Revert "ci: Allow triggering releases manually"

This reverts commit 184c7f23ad.

.examples/docker-compose-mattermost/config/config.yaml

@@ -7,10 +7,9 @@ endpoints:
   - name: example
     url: https://example.org
     interval: 1m
-    alerts:
-      - type: mattermost
-        enabled: true
-        description: "health check failed 3 times in a row"
-        send-on-resolved: true
     conditions:
       - "[STATUS] == 200"
+    alerts:
+      - type: mattermost
+        description: "health check failed 3 times in a row"
+        send-on-resolved: true

.examples/docker-compose-postgres-storage/config/config.yaml

@@ -26,7 +26,7 @@ endpoints:
       - "[STATUS] == 200"
 
   - name: example-dns-query
-    url: "1.1.1.1" # Address of the DNS server to use
+    url: "8.8.8.8" # Address of the DNS server to use
     interval: 5m
     dns:
       query-name: "example.com"

.examples/docker-compose-sqlite-storage/config/config.yaml

@@ -26,7 +26,7 @@ endpoints:
       - "[STATUS] == 200"
 
   - name: example-dns-query
-    url: "1.1.1.1" # Address of the DNS server to use
+    url: "8.8.8.8" # Address of the DNS server to use
     interval: 5m
     dns:
       query-name: "example.com"

.github/assets/gatus-diagram.drawio

@@ -1 +1 @@
-<mxfile host="app.diagrams.net" modified="2021-09-12T22:49:28.336Z" agent="5.0 (Windows)" etag="r9FJ6Bphqwq-LaTO-jp3" version="15.0.6" type="device"><diagram id="FBbfVOMCjf6Z2LK8Yagy" name="Page-1">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</diagram></mxfile>
+<mxfile host="app.diagrams.net" modified="2022-12-07T04:00:31.242Z" agent="5.0 (Windows)" etag="4-CttOJPoGYGt_6RMEMf" version="20.5.3" type="device"><diagram id="oCf8YAkR0GE5Fy88uv5t" name="Page-1">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</diagram></mxfile>

.github/dependabot.yml

@@ -0,0 +1,15 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    labels: ["dependencies"]
+    schedule:
+      interval: "weekly"
+      day: "wednesday"
+  - package-ecosystem: "gomod"
+    directory: "/"
+    open-pull-requests-limit: 1
+    labels: ["dependencies"]
+    schedule:
+      interval: "weekly"
+      day: "wednesday"

.github/workflows/benchmark.yml

@@ -18,7 +18,7 @@ jobs:
     steps:
       - uses: actions/setup-go@v3
         with:
-          go-version: 1.18
+          go-version: 1.19
           repository: "${{ github.event.inputs.repository }}"
           ref: "${{ github.event.inputs.ref }}"
       - uses: actions/checkout@v3

.github/workflows/publish-experimental.yml

@@ -0,0 +1,26 @@
+name: publish-experimental
+on: [workflow_dispatch]
+jobs:
+  publish-experimental:
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      - name: Get image repository
+        run: echo IMAGE_REPOSITORY=$(echo ${{ secrets.DOCKER_USERNAME }}/${{ github.event.repository.name }} | tr '[:upper:]' '[:lower:]') >> $GITHUB_ENV
+      - name: Login to Docker Registry
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v3
+        with:
+          platforms: linux/amd64
+          pull: true
+          push: true
+          tags: ${{ env.IMAGE_REPOSITORY }}:experimental

.github/workflows/publish-latest-to-ghcr.yml

@@ -0,0 +1,38 @@
+name: publish-latest-to-ghcr
+on:
+  workflow_run:
+    workflows: [test]
+    branches: [master]
+    types: [completed]
+concurrency:
+  group: ${{ github.workflow }}
+  cancel-in-progress: true
+jobs:
+  publish-latest-to-ghcr:
+    runs-on: ubuntu-latest
+    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+    permissions:
+      contents: read
+      packages: write
+    timeout-minutes: 60
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      - name: Get image repository
+        run: echo IMAGE_REPOSITORY=$(echo ghcr.io/${{ github.actor }}/${{ github.event.repository.name }} | tr '[:upper:]' '[:lower:]') >> $GITHUB_ENV
+      - name: Login to Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v3
+        with:
+          platforms: linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64
+          pull: true
+          push: true
+          tags: ${{ env.IMAGE_REPOSITORY }}:latest

.github/workflows/publish-latest.yml

@@ -1,33 +1,34 @@
 name: publish-latest
 on:
   workflow_run:
-    workflows: ["build"]
+    workflows: [test]
     branches: [master]
     types: [completed]
+concurrency:
+  group: ${{ github.workflow }}
+  cancel-in-progress: true
 jobs:
   publish-latest:
-    name: publish-latest
     runs-on: ubuntu-latest
     if: ${{ github.event.workflow_run.conclusion == 'success' }}
-    timeout-minutes: 45
+    timeout-minutes: 60
     steps:
       - uses: actions/checkout@v3
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
       - name: Get image repository
         run: echo IMAGE_REPOSITORY=$(echo ${{ secrets.DOCKER_USERNAME }}/${{ github.event.repository.name }} | tr '[:upper:]' '[:lower:]') >> $GITHUB_ENV
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v1
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1
       - name: Login to Docker Registry
-        uses: docker/login-action@v1
+        uses: docker/login-action@v2
         with:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
-      - name: Build and push docker image
-        uses: docker/build-push-action@v2
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v3
         with:
           platforms: linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64
           pull: true
           push: true
-          tags: |
-            ${{ env.IMAGE_REPOSITORY }}:latest
+          tags: ${{ env.IMAGE_REPOSITORY }}:latest

.github/workflows/publish-release-to-ghcr.yml

@@ -0,0 +1,34 @@
+name: publish-release-to-ghcr
+on:
+  release:
+    types: [published]
+jobs:
+  publish-release-to-ghcr:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    timeout-minutes: 60
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      - name: Get image repository
+        run: echo IMAGE_REPOSITORY=$(echo ghcr.io/${{ github.actor }}/${{ github.event.repository.name }} | tr '[:upper:]' '[:lower:]') >> $GITHUB_ENV
+      - name: Get the release
+        run: echo RELEASE=${GITHUB_REF/refs\/tags\//} >> $GITHUB_ENV
+      - name: Login to Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v3
+        with:
+          platforms: linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64
+          pull: true
+          push: true
+          tags: ${{ env.IMAGE_REPOSITORY }}:${{ env.RELEASE }},${{ env.IMAGE_REPOSITORY }}:stable

.github/workflows/publish-release.yml

@@ -6,27 +6,26 @@ jobs:
   publish-release:
     name: publish-release
     runs-on: ubuntu-latest
-    timeout-minutes: 45
+    timeout-minutes: 60
     steps:
       - uses: actions/checkout@v3
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
       - name: Get image repository
         run: echo IMAGE_REPOSITORY=$(echo ${{ secrets.DOCKER_USERNAME }}/${{ github.event.repository.name }} | tr '[:upper:]' '[:lower:]') >> $GITHUB_ENV
       - name: Get the release
         run: echo RELEASE=${GITHUB_REF/refs\/tags\//} >> $GITHUB_ENV
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v1
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1
       - name: Login to Docker Registry
-        uses: docker/login-action@v1
+        uses: docker/login-action@v2
         with:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
-      - name: Build and push docker image
-        uses: docker/build-push-action@v2
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v3
         with:
           platforms: linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64
           pull: true
           push: true
-          tags: |
-            ${{ env.IMAGE_REPOSITORY }}:${{ env.RELEASE }}
+          tags: ${{ env.IMAGE_REPOSITORY }}:${{ env.RELEASE }},${{ env.IMAGE_REPOSITORY }}:stable

.github/workflows/test.yml

@@ -1,4 +1,4 @@
-name: build
+name: test
 on:
   pull_request:
     paths-ignore:
@@ -8,24 +8,24 @@ on:
       - master
     paths-ignore:
       - '*.md'
+      - '.github/*'
 jobs:
-  build:
-    name: build
+  test:
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
       - uses: actions/setup-go@v3
         with:
-          go-version: 1.18
+          go-version: 1.19
       - uses: actions/checkout@v3
       - name: Build binary to make sure it works
-        run: go build -mod vendor
+        run: go build
       - name: Test
         # We're using "sudo" because one of the tests leverages ping, which requires super-user privileges.
         # As for the 'env "PATH=$PATH" "GOROOT=$GOROOT"', we need it to use the same "go" executable that
         # was configured by the "Set up Go" step (otherwise, it'd use sudo's "go" executable)
-        run: sudo env "PATH=$PATH" "GOROOT=$GOROOT" go test -mod vendor ./... -race -coverprofile=coverage.txt -covermode=atomic
+        run: sudo env "PATH=$PATH" "GOROOT=$GOROOT" go test ./... -race -coverprofile=coverage.txt -covermode=atomic
       - name: Codecov
-        uses: codecov/codecov-action@v2.1.0
+        uses: codecov/codecov-action@v3.1.1
         with:
           files: ./coverage.txt

.gitignore

@@ -1,5 +1,6 @@
 .idea
 .vscode
+.DS_Store
 *.db
 *.db-shm
 *.db-wal

Dockerfile

@@ -3,7 +3,7 @@ FROM golang:alpine as builder
 RUN apk --update add ca-certificates
 WORKDIR /app
 COPY . ./
-RUN CGO_ENABLED=0 GOOS=linux go build -mod vendor -a -installsuffix cgo -o gatus .
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o gatus .
 
 # Run Tests inside docker image if you don't have a configured go environment
 #RUN apk update && apk add --virtual build-dependencies build-base gcc
@@ -13,7 +13,6 @@ RUN CGO_ENABLED=0 GOOS=linux go build -mod vendor -a -installsuffix cgo -o gatus
 FROM scratch
 COPY --from=builder /app/gatus .
 COPY --from=builder /app/config.yaml ./config/config.yaml
-COPY --from=builder /app/web/static ./web/static
 COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
 ENV PORT=8080
 EXPOSE ${PORT}

LICENSE

@@ -186,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright 2021 TwiN
+   Copyright [yyyy] [name of copyright owner]
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.

README.md

@@ -1,6 +1,6 @@
 ![Gatus](.github/assets/logo-with-dark-text.png)
 
-![build](https://github.com/TwiN/gatus/workflows/build/badge.svg?branch=master)
+![test](https://github.com/TwiN/gatus/workflows/test/badge.svg?branch=master)
 [![Go Report Card](https://goreportcard.com/badge/github.com/TwiN/gatus?)](https://goreportcard.com/report/github.com/TwiN/gatus)
 [![codecov](https://codecov.io/gh/TwiN/gatus/branch/master/graph/badge.svg)](https://codecov.io/gh/TwiN/gatus)
 [![Go version](https://img.shields.io/github/go-mod/go-version/TwiN/gatus.svg)](https://github.com/TwiN/gatus)
@@ -24,9 +24,12 @@ docker run -p 8080:8080 --name gatus twinproduction/gatus
 For more details, see [Usage](#usage)
 </details>
 
-![Gatus dashboard conditions](.github/assets/dashboard-conditions.png)
+![Gatus dashboard](.github/assets/dashboard-dark.png)
+
+Have any feedback or questions? [Create a discussion](https://github.com/TwiN/gatus/discussions/new).
+
+Like this project? Please consider [sponsoring me](https://github.com/sponsors/TwiN).
 
-Have any feedback or want to share your good/bad experience with Gatus? Feel free to email me at [feedback@gatus.io](mailto:feedback@gatus.io)
 
 ## Table of Contents
 - [Why Gatus?](#why-gatus)
@@ -42,8 +45,10 @@ Have any feedback or want to share your good/bad experience with Gatus? Feel fre
     - [Configuring Discord alerts](#configuring-discord-alerts)
     - [Configuring Email alerts](#configuring-email-alerts)
     - [Configuring Google Chat alerts](#configuring-google-chat-alerts)
+    - [Configuring Matrix alerts](#configuring-matrix-alerts)
     - [Configuring Mattermost alerts](#configuring-mattermost-alerts)
     - [Configuring Messagebird alerts](#configuring-messagebird-alerts)
+    - [Configuring Ntfy alerts](#configuring-ntfy-alerts)
     - [Configuring Opsgenie alerts](#configuring-opsgenie-alerts)
     - [Configuring PagerDuty alerts](#configuring-pagerduty-alerts)
     - [Configuring Slack alerts](#configuring-slack-alerts)
@@ -55,8 +60,9 @@ Have any feedback or want to share your good/bad experience with Gatus? Feel fre
   - [Maintenance](#maintenance)
   - [Security](#security)
     - [Basic](#basic)
-    - [OIDC (ALPHA)](#oidc-alpha)
+    - [OIDC](#oidc)
   - [Metrics](#metrics)
+  - [Remote instances (EXPERIMENTAL)](#remote-instances-experimental)
 - [Deployment](#deployment)
   - [Docker](#docker)
   - [Helm Chart](#helm-chart)
@@ -68,14 +74,18 @@ Have any feedback or want to share your good/bad experience with Gatus? Feel fre
   - [Recommended interval](#recommended-interval)
   - [Default timeouts](#default-timeouts)
   - [Monitoring a TCP endpoint](#monitoring-a-tcp-endpoint)
+  - [Monitoring a UDP endpoint](#monitoring-a-udp-endpoint)
+  - [Monitoring a SCTP endpoint](#monitoring-a-sctp-endpoint)
   - [Monitoring an endpoint using ICMP](#monitoring-an-endpoint-using-icmp)
   - [Monitoring an endpoint using DNS queries](#monitoring-an-endpoint-using-dns-queries)
   - [Monitoring an endpoint using STARTTLS](#monitoring-an-endpoint-using-starttls)
   - [Monitoring an endpoint using TLS](#monitoring-an-endpoint-using-tls)
+  - [Monitoring domain expiration](#monitoring-domain-expiration)
   - [disable-monitoring-lock](#disable-monitoring-lock)
   - [Reloading configuration on the fly](#reloading-configuration-on-the-fly)
   - [Endpoint groups](#endpoint-groups)
   - [Exposing Gatus on a custom port](#exposing-gatus-on-a-custom-port)
+  - [Keeping your configuration small](#keeping-your-configuration-small)
   - [Badges](#badges)
     - [Uptime](#uptime)
     - [Health](#health)
@@ -84,6 +94,7 @@ Have any feedback or want to share your good/bad experience with Gatus? Feel fre
   - [High level design overview](#high-level-design-overview)
 - [Sponsors](#sponsors)
 
+
 ## Why Gatus?
 Before getting into the specifics, I want to address the most common question:
 > Why would I use Gatus when I can just use Prometheus’ Alertmanager, Cloudwatch or even Splunk?
@@ -113,7 +124,8 @@ The main features of Gatus are:
 - **[Badges](#badges)**: ![Uptime 7d](https://status.twin.sh/api/v1/endpoints/core_blog-external/uptimes/7d/badge.svg) ![Response time 24h](https://status.twin.sh/api/v1/endpoints/core_blog-external/response-times/24h/badge.svg)
 - **Dark mode**
 
-![Gatus dashboard dark mode](.github/assets/dashboard-dark.png)
+![Gatus dashboard conditions](.github/assets/dashboard-conditions.png)
+
 
 ## Usage
 By default, the configuration file is expected to be at `config/config.yaml`.
@@ -147,53 +159,54 @@ If you want to test it locally, see [Docker](#docker).
 
 
 ## Configuration
-| Parameter                                       | Description                                                                                                                                        | Default                    |
-|:------------------------------------------------|:---------------------------------------------------------------------------------------------------------------------------------------------------|:---------------------------|
-| `debug`                                         | Whether to enable debug logs.                                                                                                                      | `false`                    |
-| `metrics`                                       | Whether to expose metrics at /metrics.                                                                                                             | `false`                    |
-| `storage`                                       | [Storage configuration](#storage)                                                                                                                  | `{}`                       |
-| `endpoints`                                     | List of endpoints to monitor.                                                                                                                      | Required `[]`              |
-| `endpoints[].enabled`                           | Whether to monitor the endpoint.                                                                                                                   | `true`                     |
-| `endpoints[].name`                              | Name of the endpoint. Can be anything.                                                                                                             | Required `""`              |
-| `endpoints[].group`                             | Group name. Used to group multiple endpoints together on the dashboard. <br />See [Endpoint groups](#endpoint-groups).                             | `""`                       |
-| `endpoints[].url`                               | URL to send the request to.                                                                                                                        | Required `""`              |
-| `endpoints[].method`                            | Request method.                                                                                                                                    | `GET`                      |
-| `endpoints[].conditions`                        | Conditions used to determine the health of the endpoint. <br />See [Conditions](#conditions).                                                      | `[]`                       |
-| `endpoints[].interval`                          | Duration to wait between every status check.                                                                                                       | `60s`                      |
-| `endpoints[].graphql`                           | Whether to wrap the body in a query param (`{"query":"$body"}`).                                                                                   | `false`                    |
-| `endpoints[].body`                              | Request body.                                                                                                                                      | `""`                       |
-| `endpoints[].headers`                           | Request headers.                                                                                                                                   | `{}`                       |
-| `endpoints[].dns`                               | Configuration for an endpoint of type DNS. <br />See [Monitoring an endpoint using DNS queries](#monitoring-an-endpoint-using-dns-queries).        | `""`                       |
-| `endpoints[].dns.query-type`                    | Query type (e.g. MX)                                                                                                                               | `""`                       |
-| `endpoints[].dns.query-name`                    | Query name (e.g. example.com)                                                                                                                      | `""`                       |
-| `endpoints[].alerts[].type`                     | Type of alert. <br />Valid types: `slack`, `discord`, `email`, `googlechat`, `pagerduty`, `twilio`, `mattermost`, `messagebird`, `teams` `custom`. | Required `""`              |
-| `endpoints[].alerts[].enabled`                  | Whether to enable the alert.                                                                                                                       | `false`                    |
-| `endpoints[].alerts[].failure-threshold`        | Number of failures in a row needed before triggering the alert.                                                                                    | `3`                        |
-| `endpoints[].alerts[].success-threshold`        | Number of successes in a row before an ongoing incident is marked as resolved.                                                                     | `2`                        |
-| `endpoints[].alerts[].send-on-resolved`         | Whether to send a notification once a triggered alert is marked as resolved.                                                                       | `false`                    |
-| `endpoints[].alerts[].description`              | Description of the alert. Will be included in the alert sent.                                                                                      | `""`                       |
-| `endpoints[].client`                            | [Client configuration](#client-configuration).                                                                                                     | `{}`                       |
-| `endpoints[].ui`                                | UI configuration at the endpoint level.                                                                                                            | `{}`                       |
-| `endpoints[].ui.hide-hostname`                  | Whether to hide the hostname in the result.                                                                                                        | `false`                    |
-| `endpoints[].ui.hide-url`                       | Whether to ensure the URL is not displayed in the results. Useful if the URL contains a token.                                                     | `false`                    |
-| `endpoints[].ui.dont-resolve-failed-conditions` | Whether to resolve failed conditions for the UI.                                                                                                   | `false`                    |
-| `alerting`                                      | [Alerting configuration](#alerting).                                                                                                               | `{}`                       |
-| `security`                                      | [Security configuration](#security).                                                                                                               | `{}`                       |
-| `disable-monitoring-lock`                       | Whether to [disable the monitoring lock](#disable-monitoring-lock).                                                                                | `false`                    |
-| `skip-invalid-config-update`                    | Whether to ignore invalid configuration update. <br />See [Reloading configuration on the fly](#reloading-configuration-on-the-fly).               | `false`                    |
-| `web`                                           | Web configuration.                                                                                                                                 | `{}`                       |
-| `web.address`                                   | Address to listen on.                                                                                                                              | `0.0.0.0`                  |
-| `web.port`                                      | Port to listen on.                                                                                                                                 | `8080`                     |
-| `ui`                                            | UI configuration.                                                                                                                                  | `{}`                       |
-| `ui.title`                                      | [Title of the document](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/title).                                                          | `Health Dashboard ǀ Gatus` |
-| `ui.header`                                     | Header at the top of the dashboard.                                                                                                                | `Health Status`            |
-| `ui.logo`                                       | URL to the logo to display.                                                                                                                        | `""`                       |
-| `ui.link`                                       | Link to open when the logo is clicked.                                                                                                             | `""`                       |
-| `ui.buttons`                                    | List of buttons to display below the header.                                                                                                       | `[]`                       |
-| `ui.buttons[].name`                             | Text to display on the button.                                                                                                                     | Required `""`              |
-| `ui.buttons[].link`                             | Link to open when the button is clicked.                                                                                                           | Required `""`              |
-| `maintenance`                                   | [Maintenance configuration](#maintenance).                                                                                                         | `{}`                       |
-
+| Parameter                                       | Description                                                                                                                                 | Default                    |
+|:------------------------------------------------|:--------------------------------------------------------------------------------------------------------------------------------------------|:---------------------------|
+| `debug`                                         | Whether to enable debug logs.                                                                                                               | `false`                    |
+| `metrics`                                       | Whether to expose metrics at /metrics.                                                                                                      | `false`                    |
+| `storage`                                       | [Storage configuration](#storage)                                                                                                           | `{}`                       |
+| `endpoints`                                     | List of endpoints to monitor.                                                                                                               | Required `[]`              |
+| `endpoints[].enabled`                           | Whether to monitor the endpoint.                                                                                                            | `true`                     |
+| `endpoints[].name`                              | Name of the endpoint. Can be anything.                                                                                                      | Required `""`              |
+| `endpoints[].group`                             | Group name. Used to group multiple endpoints together on the dashboard. <br />See [Endpoint groups](#endpoint-groups).                      | `""`                       |
+| `endpoints[].url`                               | URL to send the request to.                                                                                                                 | Required `""`              |
+| `endpoints[].method`                            | Request method.                                                                                                                             | `GET`                      |
+| `endpoints[].conditions`                        | Conditions used to determine the health of the endpoint. <br />See [Conditions](#conditions).                                               | `[]`                       |
+| `endpoints[].interval`                          | Duration to wait between every status check.                                                                                                | `60s`                      |
+| `endpoints[].graphql`                           | Whether to wrap the body in a query param (`{"query":"$body"}`).                                                                            | `false`                    |
+| `endpoints[].body`                              | Request body.                                                                                                                               | `""`                       |
+| `endpoints[].headers`                           | Request headers.                                                                                                                            | `{}`                       |
+| `endpoints[].dns`                               | Configuration for an endpoint of type DNS. <br />See [Monitoring an endpoint using DNS queries](#monitoring-an-endpoint-using-dns-queries). | `""`                       |
+| `endpoints[].dns.query-type`                    | Query type (e.g. MX)                                                                                                                        | `""`                       |
+| `endpoints[].dns.query-name`                    | Query name (e.g. example.com)                                                                                                               | `""`                       |
+| `endpoints[].alerts[].type`                     | Type of alert. <br />See [Alerting](#alerting) for all valid types.                                                                         | Required `""`              |
+| `endpoints[].alerts[].enabled`                  | Whether to enable the alert.                                                                                                                | `true`                     |
+| `endpoints[].alerts[].failure-threshold`        | Number of failures in a row needed before triggering the alert.                                                                             | `3`                        |
+| `endpoints[].alerts[].success-threshold`        | Number of successes in a row before an ongoing incident is marked as resolved.                                                              | `2`                        |
+| `endpoints[].alerts[].send-on-resolved`         | Whether to send a notification once a triggered alert is marked as resolved.                                                                | `false`                    |
+| `endpoints[].alerts[].description`              | Description of the alert. Will be included in the alert sent.                                                                               | `""`                       |
+| `endpoints[].client`                            | [Client configuration](#client-configuration).                                                                                              | `{}`                       |
+| `endpoints[].ui`                                | UI configuration at the endpoint level.                                                                                                     | `{}`                       |
+| `endpoints[].ui.hide-hostname`                  | Whether to hide the hostname in the result.                                                                                                 | `false`                    |
+| `endpoints[].ui.hide-url`                       | Whether to ensure the URL is not displayed in the results. Useful if the URL contains a token.                                              | `false`                    |
+| `endpoints[].ui.dont-resolve-failed-conditions` | Whether to resolve failed conditions for the UI.                                                                                            | `false`                    |
+| `endpoints[].ui.badge.reponse-time`             | List of response time thresholds. Each time a threshold is reached, the badge has a different color.                                        | `[50, 200, 300, 500, 750]` |
+| `alerting`                                      | [Alerting configuration](#alerting).                                                                                                        | `{}`                       |
+| `security`                                      | [Security configuration](#security).                                                                                                        | `{}`                       |
+| `disable-monitoring-lock`                       | Whether to [disable the monitoring lock](#disable-monitoring-lock).                                                                         | `false`                    |
+| `skip-invalid-config-update`                    | Whether to ignore invalid configuration update. <br />See [Reloading configuration on the fly](#reloading-configuration-on-the-fly).        | `false`                    |
+| `web`                                           | Web configuration.                                                                                                                          | `{}`                       |
+| `web.address`                                   | Address to listen on.                                                                                                                       | `0.0.0.0`                  |
+| `web.port`                                      | Port to listen on.                                                                                                                          | `8080`                     |
+| `ui`                                            | UI configuration.                                                                                                                           | `{}`                       |
+| `ui.title`                                      | [Title of the document](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/title).                                                   | `Health Dashboard ǀ Gatus` |
+| `ui.description`                                | Meta description for the page.                                                                                                              | `Gatus is an advanced...`. |
+| `ui.header`                                     | Header at the top of the dashboard.                                                                                                         | `Health Status`            |
+| `ui.logo`                                       | URL to the logo to display.                                                                                                                 | `""`                       |
+| `ui.link`                                       | Link to open when the logo is clicked.                                                                                                      | `""`                       |
+| `ui.buttons`                                    | List of buttons to display below the header.                                                                                                | `[]`                       |
+| `ui.buttons[].name`                             | Text to display on the button.                                                                                                              | Required `""`              |
+| `ui.buttons[].link`                             | Link to open when the button is clicked.                                                                                                    | Required `""`              |
+| `maintenance`                                   | [Maintenance configuration](#maintenance).                                                                                                  | `{}`                       |
 
 ### Conditions
 Here are some examples of conditions you can use:
@@ -219,18 +232,20 @@ Here are some examples of conditions you can use:
 | `[BODY].name == pat(john*)`      | String at JSONPath `$.name` matches pattern `john*` | `{"name":"john.doe"}`      | `{"name":"bob"}` |
 | `[BODY].id == any(1, 2)`         | Value at JSONPath `$.id` is equal to `1` or `2`     | 1, 2                       | 3, 4, 5          |
 | `[CERTIFICATE_EXPIRATION] > 48h` | Certificate expiration is more than 48h away        | 49h, 50h, 123h             | 1h, 24h, ...     |
+| `[DOMAIN_EXPIRATION] > 720h`     | The domain must expire in more than 720h            | 4000h                      | 1h, 24h, ...     |
 
 
 #### Placeholders
 | Placeholder                | Description                                                                               | Example of resolved value                    |
 |:---------------------------|:------------------------------------------------------------------------------------------|:---------------------------------------------|
-| `[STATUS]`                 | Resolves into the HTTP status of the request                                              | 404                                          |
-| `[RESPONSE_TIME]`          | Resolves into the response time the request took, in ms                                   | 10                                           |
-| `[IP]`                     | Resolves into the IP of the target host                                                   | 192.168.0.232                                |
+| `[STATUS]`                 | Resolves into the HTTP status of the request                                              | `404`                                        |
+| `[RESPONSE_TIME]`          | Resolves into the response time the request took, in ms                                   | `10`                                         |
+| `[IP]`                     | Resolves into the IP of the target host                                                   | `192.168.0.232`                              |
 | `[BODY]`                   | Resolves into the response body. Supports JSONPath.                                       | `{"name":"john.doe"}`                        |
 | `[CONNECTED]`              | Resolves into whether a connection could be established                                   | `true`                                       |
 | `[CERTIFICATE_EXPIRATION]` | Resolves into the duration before certificate expiration (valid units are "s", "m", "h".) | `24h`, `48h`, 0 (if not protocol with certs) |
-| `[DNS_RCODE]`              | Resolves into the DNS status of the response                                              | NOERROR                                      |
+| `[DOMAIN_EXPIRATION]`      | Resolves into the duration before the domain expires (valid units are "s", "m", "h".)     | `24h`, `48h`, `1234h56m78s`                  |
+| `[DNS_RCODE]`              | Resolves into the DNS status of the response                                              | `NOERROR`                                    |
 
 
 #### Functions
@@ -245,11 +260,12 @@ Here are some examples of conditions you can use:
 
 
 ### Storage
-| Parameter      | Description                                                                    | Default    |
-|:---------------|:-------------------------------------------------------------------------------|:-----------|
-| `storage`      | Storage configuration                                                          | `{}`       |
-| `storage.path` | Path to persist the data in. Only supported for types `sqlite` and `postgres`. | `""`       |
-| `storage.type` | Type of storage. Valid types: `memory`, `sqlite`, `postgres`.                  | `"memory"` |
+| Parameter         | Description                                                                                                                                        | Default    |
+|:------------------|:---------------------------------------------------------------------------------------------------------------------------------------------------|:-----------|
+| `storage`         | Storage configuration                                                                                                                              | `{}`       |
+| `storage.path`    | Path to persist the data in. Only supported for types `sqlite` and `postgres`.                                                                     | `""`       |
+| `storage.type`    | Type of storage. Valid types: `memory`, `sqlite`, `postgres`.                                                                                      | `"memory"` |
+| `storage.caching` | Whether to use write-through caching. Improves loading time for large dashboards. <br />Only supported if `storage.type` is `sqlite` or `postgres` | `false`    |
 
 - If `storage.type` is `memory` (default):
 ```yaml
@@ -276,7 +292,7 @@ See [examples/docker-compose-postgres-storage](.examples/docker-compose-postgres
 
 
 ### Client configuration
-In order to support a wide range of environments, each monitored endpoint has a unique configuration for 
+In order to support a wide range of environments, each monitored endpoint has a unique configuration for
 the client used to send the request.
 
 | Parameter                     | Description                                                                | Default         |
@@ -322,7 +338,7 @@ endpoints:
   - name: with-custom-dns-resolver
     url: "https://your.health.api/health"
     client:
-      dns-resolver: "tcp://1.1.1.1:53"
+      dns-resolver: "tcp://8.8.8.8:53"
     conditions:
       - "[STATUS] == 200"
 ```
@@ -342,6 +358,7 @@ endpoints:
       - "[STATUS] == 200"
 ```
 
+
 ### Alerting
 Gatus supports multiple alerting providers, such as Slack and PagerDuty, and supports different alerts for each
 individual endpoints with configurable descriptions and thresholds.
@@ -351,18 +368,21 @@ ignored.
 
 | Parameter              | Description                                                                                                                  | Default |
 |:-----------------------|:-----------------------------------------------------------------------------------------------------------------------------|:--------|
+| `alerting.custom`      | Configuration for custom actions on failure or alerts. <br />See [Configuring Custom alerts](#configuring-custom-alerts).    | `{}`    |
 | `alerting.discord`     | Configuration for alerts of type `discord`. <br />See [Configuring Discord alerts](#configuring-discord-alerts).             | `{}`    |
 | `alerting.email`       | Configuration for alerts of type `email`. <br />See [Configuring Email alerts](#configuring-email-alerts).                   | `{}`    |
 | `alerting.googlechat`  | Configuration for alerts of type `googlechat`. <br />See [Configuring Google Chat alerts](#configuring-google-chat-alerts).  | `{}`    |
+| `alerting.matrix`      | Configuration for alerts of type `matrix`. <br />See [Configuring Matrix alerts](#configuring-matrix-alerts).                | `{}`    |
 | `alerting.mattermost`  | Configuration for alerts of type `mattermost`. <br />See [Configuring Mattermost alerts](#configuring-mattermost-alerts).    | `{}`    |
 | `alerting.messagebird` | Configuration for alerts of type `messagebird`. <br />See [Configuring Messagebird alerts](#configuring-messagebird-alerts). | `{}`    |
+| `alerting.ntfy`        | Configuration for alerts of type `ntfy`. <br />See [Configuring Ntfy alerts](#configuring-ntfy-alerts).                      | `{}`    |
 | `alerting.opsgenie`    | Configuration for alerts of type `opsgenie`. <br />See [Configuring Opsgenie alerts](#configuring-opsgenie-alerts).          | `{}`    |
 | `alerting.pagerduty`   | Configuration for alerts of type `pagerduty`. <br />See [Configuring PagerDuty alerts](#configuring-pagerduty-alerts).       | `{}`    |
 | `alerting.slack`       | Configuration for alerts of type `slack`. <br />See [Configuring Slack alerts](#configuring-slack-alerts).                   | `{}`    |
 | `alerting.teams`       | Configuration for alerts of type `teams`. <br />See [Configuring Teams alerts](#configuring-teams-alerts).                   | `{}`    |
 | `alerting.telegram`    | Configuration for alerts of type `telegram`. <br />See [Configuring Telegram alerts](#configuring-telegram-alerts).          | `{}`    |
 | `alerting.twilio`      | Settings for alerts of type `twilio`. <br />See [Configuring Twilio alerts](#configuring-twilio-alerts).                     | `{}`    |
-| `alerting.custom`      | Configuration for custom actions on failure or alerts. <br />See [Configuring Custom alerts](#configuring-custom-alerts).    | `{}`    |
+
 
 #### Configuring Discord alerts
 
@@ -377,7 +397,7 @@ ignored.
 
 ```yaml
 alerting:
-  discord: 
+  discord:
     webhook-url: "https://discord.com/api/webhooks/**********/**********"
 
 endpoints:
@@ -390,11 +410,11 @@ endpoints:
       - "[RESPONSE_TIME] < 300"
     alerts:
       - type: discord
-        enabled: true
         description: "healthcheck failed"
         send-on-resolved: true
 ```
 
+
 #### Configuring Email alerts
 
 | Parameter                          | Description                                                                                | Default       |
@@ -420,7 +440,7 @@ alerting:
     host: "mail.example.com"
     port: 587
     to: "recipient1@example.com,recipient2@example.com"
-    # You can also add group-specific to keys, which will 
+    # You can also add group-specific to keys, which will
     # override the to key above for the specified groups
     overrides:
       - group: "core"
@@ -436,7 +456,6 @@ endpoints:
       - "[RESPONSE_TIME] < 300"
     alerts:
       - type: email
-        enabled: true
         description: "healthcheck failed"
         send-on-resolved: true
 
@@ -449,13 +468,13 @@ endpoints:
       - "[CERTIFICATE_EXPIRATION] > 48h"
     alerts:
       - type: email
-        enabled: true
         description: "healthcheck failed"
         send-on-resolved: true
 ```
 
 **NOTE:** Some mail servers are painfully slow.
 
+
 #### Configuring Google Chat alerts
 
 | Parameter                                     | Description                                                                                 | Default       |
@@ -470,24 +489,55 @@ endpoints:
 
 ```yaml
 alerting:
-  googlechat: 
+  googlechat:
     webhook-url: "https://chat.googleapis.com/v1/spaces/*******/messages?key=**********&token=********"
 
 endpoints:
   - name: website
     url: "https://twin.sh/health"
-    interval: 30s
+    interval: 5m
     conditions:
       - "[STATUS] == 200"
       - "[BODY].status == UP"
       - "[RESPONSE_TIME] < 300"
     alerts:
       - type: googlechat
-        enabled: true
         description: "healthcheck failed"
         send-on-resolved: true
 ```
 
+
+#### Configuring Matrix alerts
+| Parameter                                | Description                                                                                | Default                            |
+|:-----------------------------------------|:-------------------------------------------------------------------------------------------|:-----------------------------------|
+| `alerting.matrix`                        | Configuration for alerts of type `matrix`                                                  | `{}`                               |
+| `alerting.matrix.server-url`             | Homeserver URL                                                                             | `https://matrix-client.matrix.org` |
+| `alerting.matrix.access-token`           | Bot user access token (see https://webapps.stackexchange.com/q/131056)                     | Required `""`                      |
+| `alerting.matrix.internal-room-id`       | Internal room ID of room to send alerts to (can be found in Room Settings > Advanced)      | Required `""`                      |
+| `alerting.matrix.default-alert`          | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert) | N/A                                |
+
+```yaml
+alerting:
+  matrix:
+    server-url: "https://matrix-client.matrix.org"
+    access-token: "123456"
+    internal-room-id: "!example:matrix.org"
+
+endpoints:
+  - name: website
+    interval: 5m
+    url: "https://twin.sh/health"
+    conditions:
+      - "[STATUS] == 200"
+      - "[BODY].status == UP"
+      - "[RESPONSE_TIME] < 300"
+    alerts:
+      - type: matrix
+        send-on-resolved: true
+        description: "healthcheck failed"
+```
+
+
 #### Configuring Mattermost alerts
 | Parameter                                     | Description                                                                                 | Default       |
 |:----------------------------------------------|:--------------------------------------------------------------------------------------------|:--------------|
@@ -501,7 +551,7 @@ endpoints:
 
 ```yaml
 alerting:
-  mattermost: 
+  mattermost:
     webhook-url: "http://**********/hooks/**********"
     client:
       insecure: true
@@ -509,14 +559,13 @@ alerting:
 endpoints:
   - name: website
     url: "https://twin.sh/health"
-    interval: 30s
+    interval: 5m
     conditions:
       - "[STATUS] == 200"
       - "[BODY].status == UP"
       - "[RESPONSE_TIME] < 300"
     alerts:
       - type: mattermost
-        enabled: true
         description: "healthcheck failed"
         send-on-resolved: true
 ```
@@ -525,10 +574,11 @@ Here's an example of what the notifications look like:
 
 ![Mattermost notifications](.github/assets/mattermost-alerts.png)
 
+
 #### Configuring Messagebird alerts
 | Parameter                            | Description                                                                                | Default       |
 |:-------------------------------------|:-------------------------------------------------------------------------------------------|:--------------|
-| `alerting.messagebird`               | Settings for alerts of type `messagebird`                                                  | `{}`          |
+| `alerting.messagebird`               | Configuration for alerts of type `messagebird`                                             | `{}`          |
 | `alerting.messagebird.access-key`    | Messagebird access key                                                                     | Required `""` |
 | `alerting.messagebird.originator`    | The sender of the message                                                                  | Required `""` |
 | `alerting.messagebird.recipients`    | The recipients of the message                                                              | Required `""` |
@@ -544,7 +594,7 @@ alerting:
 
 endpoints:
   - name: website
-    interval: 30s
+    interval: 5m
     url: "https://twin.sh/health"
     conditions:
       - "[STATUS] == 200"
@@ -552,13 +602,47 @@ endpoints:
       - "[RESPONSE_TIME] < 300"
     alerts:
       - type: messagebird
-        enabled: true
         failure-threshold: 3
         send-on-resolved: true
         description: "healthcheck failed"
 ```
 
 
+#### Configuring Ntfy alerts
+| Parameter                     | Description                                                                                | Default           |
+|:------------------------------|:-------------------------------------------------------------------------------------------|:------------------|
+| `alerting.ntfy`               | Configuration for alerts of type `ntfy`                                                    | `{}`              |
+| `alerting.ntfy.topic`         | Topic at which the alert will be sent                                                      | Required `""`     |
+| `alerting.ntfy.url`           | The URL of the target server                                                               | `https://ntfy.sh` |
+| `alerting.ntfy.priority`      | The priority of the alert                                                                  | `3`               |
+| `alerting.ntfy.default-alert` | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert) | N/A               |
+
+[ntfy](https://github.com/binwiederhier/ntfy) is an amazing project that allows you to subscribe to desktop
+and mobile notifications, making it an awesome addition to Gatus.
+
+Example:
+```yaml
+alerting:
+  ntfy:
+    topic: "gatus-test-topic"
+    priority: 2
+    default-alert:
+      failure-threshold: 3
+      send-on-resolved: true
+
+endpoints:
+  - name: website
+    interval: 5m
+    url: "https://twin.sh/health"
+    conditions:
+      - "[STATUS] == 200"
+      - "[BODY].status == UP"
+      - "[RESPONSE_TIME] < 300"
+    alerts:
+      - type: ntfy
+```
+
+
 #### Configuring Opsgenie alerts
 | Parameter                         | Description                                                                                | Default              |
 |:----------------------------------|:-------------------------------------------------------------------------------------------|:---------------------|
@@ -601,9 +685,9 @@ Behavior:
 
 ```yaml
 alerting:
-  pagerduty: 
+  pagerduty:
     integration-key: "********************************"
-    # You can also add group-specific integration keys, which will 
+    # You can also add group-specific integration keys, which will
     # override the integration key above for the specified groups
     overrides:
       - group: "core"
@@ -619,7 +703,6 @@ endpoints:
       - "[RESPONSE_TIME] < 300"
     alerts:
       - type: pagerduty
-        enabled: true
         failure-threshold: 3
         success-threshold: 5
         send-on-resolved: true
@@ -634,7 +717,6 @@ endpoints:
       - "[CERTIFICATE_EXPIRATION] > 48h"
     alerts:
       - type: pagerduty
-        enabled: true
         failure-threshold: 3
         success-threshold: 5
         send-on-resolved: true
@@ -653,7 +735,7 @@ endpoints:
 | `alerting.slack.overrides[].webhook-url`  | Slack Webhook URL                                                                          | `""`          |
 ```yaml
 alerting:
-  slack: 
+  slack:
     webhook-url: "https://hooks.slack.com/services/**********/**********/**********"
 
 endpoints:
@@ -666,11 +748,9 @@ endpoints:
       - "[RESPONSE_TIME] < 300"
     alerts:
       - type: slack
-        enabled: true
         description: "healthcheck failed 3 times in a row"
         send-on-resolved: true
       - type: slack
-        enabled: true
         failure-threshold: 5
         description: "healthcheck failed 5 times in a row"
         send-on-resolved: true
@@ -696,7 +776,7 @@ Here's an example of what the notifications look like:
 alerting:
   teams:
     webhook-url: "https://********.webhook.office.com/webhookb2/************"
-    # You can also add group-specific to keys, which will 
+    # You can also add group-specific to keys, which will
     # override the to key above for the specified groups
     overrides:
       - group: "core"
@@ -712,7 +792,6 @@ endpoints:
       - "[RESPONSE_TIME] < 300"
     alerts:
       - type: teams
-        enabled: true
         description: "healthcheck failed"
         send-on-resolved: true
 
@@ -725,7 +804,6 @@ endpoints:
       - "[CERTIFICATE_EXPIRATION] > 48h"
     alerts:
       - type: teams
-        enabled: true
         description: "healthcheck failed"
         send-on-resolved: true
 ```
@@ -734,6 +812,7 @@ Here's an example of what the notifications look like:
 
 ![Teams notifications](.github/assets/teams-alerts.png)
 
+
 #### Configuring Telegram alerts
 | Parameter                         | Description                                                                                | Default                    |
 |:----------------------------------|:-------------------------------------------------------------------------------------------|:---------------------------|
@@ -741,11 +820,12 @@ Here's an example of what the notifications look like:
 | `alerting.telegram.token`         | Telegram Bot Token                                                                         | Required `""`              |
 | `alerting.telegram.id`            | Telegram User ID                                                                           | Required `""`              |
 | `alerting.telegram.api-url`       | Telegram API URL                                                                           | `https://api.telegram.org` |
+| `alerting.telegram.client`        | Client configuration. <br />See [Client configuration](#client-configuration).             | `{}`                       |
 | `alerting.telegram.default-alert` | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert) | N/A                        |
 
 ```yaml
 alerting:
-  telegram: 
+  telegram:
     token: "123456:ABC-DEF1234ghIkl-zyx57W2v1u123ew11"
     id: "0123456789"
 
@@ -758,7 +838,6 @@ endpoints:
       - "[BODY].status == UP"
     alerts:
       - type: telegram
-        enabled: true
         send-on-resolved: true
 ```
 
@@ -795,7 +874,6 @@ endpoints:
       - "[RESPONSE_TIME] < 300"
     alerts:
       - type: twilio
-        enabled: true
         failure-threshold: 5
         send-on-resolved: true
         description: "healthcheck failed"
@@ -813,9 +891,9 @@ endpoints:
 | `alerting.custom.client`        | Client configuration. <br />See [Client configuration](#client-configuration).             | `{}`          |
 | `alerting.custom.default-alert` | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert) | N/A           |
 
-While they're called alerts, you can use this feature to call anything. 
+While they're called alerts, you can use this feature to call anything.
 
-For instance, you could automate rollbacks by having an application that keeps tracks of new deployments, and by 
+For instance, you could automate rollbacks by having an application that keeps tracks of new deployments, and by
 leveraging Gatus, you could have Gatus call that application endpoint when an endpoint starts failing. Your application
 would then check if the endpoint that started failing was part of the recently deployed application, and if it was,
 then automatically roll it back.
@@ -827,7 +905,7 @@ Furthermore, you may use the following placeholders in the body (`alerting.custo
 - `[ENDPOINT_URL]` (resolved from `endpoints[].url`)
 
 If you have an alert using the `custom` provider with `send-on-resolved` set to `true`, you can use the
-`[ALERT_TRIGGERED_OR_RESOLVED]` placeholder to differentiate the notifications. 
+`[ALERT_TRIGGERED_OR_RESOLVED]` placeholder to differentiate the notifications.
 The aforementioned placeholder will be replaced by `TRIGGERED` or `RESOLVED` accordingly, though it can be modified
 (details at the end of this section).
 
@@ -851,7 +929,6 @@ endpoints:
       - "[RESPONSE_TIME] < 300"
     alerts:
       - type: custom
-        enabled: true
         failure-threshold: 10
         success-threshold: 3
         send-on-resolved: true
@@ -867,7 +944,7 @@ alerting:
         TRIGGERED: "partial_outage"
         RESOLVED: "operational"
 ```
-As a result, the `[ALERT_TRIGGERED_OR_RESOLVED]` in the body of first example of this section would be replaced by 
+As a result, the `[ALERT_TRIGGERED_OR_RESOLVED]` in the body of first example of this section would be replaced by
 `partial_outage` when an alert is triggered and `operational` when an alert is resolved.
 
 
@@ -880,16 +957,17 @@ As a result, the `[ALERT_TRIGGERED_OR_RESOLVED]` in the body of first example of
 | `alerting.*.default-alert.send-on-resolved`   | Whether to send a notification once a triggered alert is marked as resolved   | N/A     |
 | `alerting.*.default-alert.description`        | Description of the alert. Will be included in the alert sent                  | N/A     |
 
+> ⚠ You must still specify the `type` of the alert in the endpoint configuration even if you set the default alert of a provider.
+
 While you can specify the alert configuration directly in the endpoint definition, it's tedious and may lead to a very
 long configuration file.
 
 To avoid such problem, you can use the `default-alert` parameter present in each provider configuration:
 ```yaml
 alerting:
-  slack: 
+  slack:
     webhook-url: "https://hooks.slack.com/services/**********/**********/**********"
     default-alert:
-      enabled: true
       description: "health check failed"
       send-on-resolved: true
       failure-threshold: 5
@@ -936,12 +1014,10 @@ alerting:
   slack:
     webhook-url: "https://hooks.slack.com/services/**********/**********/**********"
     default-alert:
-      enabled: true
       failure-threshold: 3
   pagerduty:
     integration-key: "********************************"
     default-alert:
-      enabled: true
       failure-threshold: 5
 
 endpoints:
@@ -962,8 +1038,9 @@ endpoints:
       - type: pagerduty
 ```
 
+
 ### Maintenance
-If you have maintenance windows, you may not want to be annoyed by alerts. 
+If you have maintenance windows, you may not want to be annoyed by alerts.
 To do that, you'll have to use the maintenance configuration:
 
 | Parameter              | Description                                                                                                                            | Default       |
@@ -1000,6 +1077,7 @@ maintenance:
 | `security.basic`                 | HTTP Basic configuration     | `{}`          |
 | `security.oidc`                  | OpenID Connect configuration | `{}`          |
 
+
 #### Basic
 | Parameter                               | Description                                                                        | Default       |
 |:----------------------------------------|:-----------------------------------------------------------------------------------|:--------------|
@@ -1018,7 +1096,8 @@ security:
 **WARNING:** Make sure to carefully select to cost of the bcrypt hash. The higher the cost, the longer it takes to compute the hash,
 and basic auth verifies the password against the hash on every request. As of 2022-01-08, I suggest a cost of 8.
 
-#### OIDC (ALPHA)
+
+#### OIDC
 | Parameter                        | Description                                                    | Default       |
 |:---------------------------------|:---------------------------------------------------------------|:--------------|
 | `security.oidc`                  | OpenID Connect configuration                                   | `{}`          |
@@ -1041,7 +1120,7 @@ security:
     #allowed-subjects: ["johndoe@example.com"]
 ```
 
-**NOTE:** The OIDC feature is currently in Alpha. Breaking changes may occur. Use this feature at your own risk.
+Confused? Read [Securing Gatus with OIDC using Auth0](https://twin.sh/articles/56/securing-gatus-with-oidc-using-auth0).
 
 
 ### Metrics
@@ -1059,6 +1138,32 @@ endpoint on the same port your application is configured to run on (`web.port`).
 See [examples/docker-compose-grafana-prometheus](.examples/docker-compose-grafana-prometheus) for further documentation as well as an example.
 
 
+### Remote instances (EXPERIMENTAL)
+This feature allows you to retrieve endpoint statuses from a remote Gatus instance.
+
+There are two main use cases for this:
+- You have multiple Gatus instances running on different machines, and you wish to visually expose the statuses through a single dashboard
+- You have one or more Gatus instances that are not publicly accessible (e.g. behind a firewall), and you wish to retrieve 
+
+This is an experimental feature. It may be removed or updated in a breaking manner at any time. Furthermore,
+there are known issues with this feature. If you'd like to provide some feedback, please write a comment in [#64](https://github.com/TwiN/gatus/issues/64).
+Use at your own risk.
+
+| Parameter                          | Description                                  | Default        |
+|:-----------------------------------|:---------------------------------------------|:---------------|
+| `remote`                           | Remote configuration                         | `{}`           |
+| `remote.instances`                 | List of remote instances                     | Required `[]`  |
+| `remote.instances.endpoint-prefix` | String to prefix all endpoint names with     | `""`           |
+| `remote.instances.url`             | URL from which to retrieve endpoint statuses | Required `""`  |
+
+```yaml
+remote:
+  instances:
+    - endpoint-prefix: "status.example.org-"
+      url: "https://status.example.org/api/v1/endpoints/statuses"
+```
+
+
 ## Deployment
 Many examples can be found in the [.examples](.examples) folder, but this section will focus on the most popular ways of deploying Gatus.
 
@@ -1069,8 +1174,8 @@ To run Gatus locally with Docker:
 docker run -p 8080:8080 --name gatus twinproduction/gatus
 ```
 
-Other than using one of the examples provided in the [.examples](.examples) folder, you can also try it out locally by 
-creating a configuration file, we'll call it `config.yaml` for this example, and running the following 
+Other than using one of the examples provided in the [.examples](.examples) folder, you can also try it out locally by
+creating a configuration file, we'll call it `config.yaml` for this example, and running the following
 command:
 ```console
 docker run -p 8080:8080 --mount type=bind,source="$(pwd)"/config.yaml,target=/config/config.yaml --name gatus twinproduction/gatus
@@ -1105,7 +1210,6 @@ and [helmfile example](https://github.com/avakarev/gatus-chart#helmfileyaml-exam
 Gatus can be deployed on Terraform by using the following module: [terraform-kubernetes-gatus](https://github.com/TwiN/terraform-kubernetes-gatus).
 
 
-
 ## Running the tests
 ```console
 go test ./... -mod vendor
@@ -1154,26 +1258,26 @@ will send a `POST` request to `http://localhost:8080/playground` with the follow
 To ensure that Gatus provides reliable and accurate results (i.e. response time), Gatus only evaluates one endpoint at a time
 In other words, even if you have multiple endpoints with the same interval, they will not execute at the same time.
 
-You can test this yourself by running Gatus with several endpoints configured with a very short, unrealistic interval, 
+You can test this yourself by running Gatus with several endpoints configured with a very short, unrealistic interval,
 such as 1ms. You'll notice that the response time does not fluctuate - that is because while endpoints are evaluated on
 different goroutines, there's a global lock that prevents multiple endpoints from running at the same time.
 
-Unfortunately, there is a drawback. If you have a lot of endpoints, including some that are very slow or prone to timing out 
+Unfortunately, there is a drawback. If you have a lot of endpoints, including some that are very slow or prone to timing out
 (the default timeout is 10s), then it means that for the entire duration of the request, no other endpoint can be evaluated.
 
-The interval does not include the duration of the request itself, which means that if an endpoint has an interval of 30s 
-and the request takes 2s to complete, the timestamp between two evaluations will be 32s, not 30s. 
+The interval does not include the duration of the request itself, which means that if an endpoint has an interval of 30s
+and the request takes 2s to complete, the timestamp between two evaluations will be 32s, not 30s.
 
-While this does not prevent Gatus' from performing health checks on all other endpoints, it may cause Gatus to be unable 
+While this does not prevent Gatus' from performing health checks on all other endpoints, it may cause Gatus to be unable
 to respect the configured interval, for instance:
-- Endpoint A has an interval of 5s, and times out after 10s to complete 
+- Endpoint A has an interval of 5s, and times out after 10s to complete
 - Endpoint B has an interval of 5s, and takes 1ms to complete
 - Endpoint B will be unable to run every 5s, because endpoint A's health evaluation takes longer than its interval
 
-To sum it up, while Gatus can handle any interval you throw at it, you're better off having slow requests with 
+To sum it up, while Gatus can handle any interval you throw at it, you're better off having slow requests with
 higher interval.
 
-As a rule of thumb, I personally set the interval for more complex health checks to `5m` (5 minutes) and 
+As a rule of thumb, I personally set the interval for more complex health checks to `5m` (5 minutes) and
 simple health checks used for alerting (PagerDuty/Twilio) to `30s`.
 
 
@@ -1199,18 +1303,49 @@ endpoints:
       - "[CONNECTED] == true"
 ```
 
-Placeholders `[STATUS]` and `[BODY]` as well as the fields `endpoints[].body`, `endpoints[].headers`, 
+Placeholders `[STATUS]` and `[BODY]` as well as the fields `endpoints[].body`, `endpoints[].headers`,
 `endpoints[].method` and `endpoints[].graphql` are not supported for TCP endpoints.
 
 This works for applications such as databases (Postgres, MySQL, etc.) and caches (Redis, Memcached, etc.).
 
-**NOTE**: `[CONNECTED] == true` does not guarantee that the endpoint itself is healthy - it only guarantees that there's 
-something at the given address listening to the given port, and that a connection to that address was successfully 
+**NOTE**: `[CONNECTED] == true` does not guarantee that the endpoint itself is healthy - it only guarantees that there's
+something at the given address listening to the given port, and that a connection to that address was successfully
 established.
 
+### Monitoring a UDP endpoint
+By prefixing `endpoints[].url` with `udp:\\`, you can monitor UDP endpoints at a very basic level:
+
+```yaml
+endpoints:
+  - name: example
+    url: "udp://example.org:80"
+    conditions:
+      - "[CONNECTED] == true"
+```
+
+Placeholders `[STATUS]` and `[BODY]` as well as the fields `endpoints[].body`, `endpoints[].headers`,
+`endpoints[].method` and `endpoints[].graphql` are not supported for UDP endpoints.
+
+This works for UDP based application.
+
+### Monitoring a SCTP endpoint
+By prefixing `endpoints[].url` with `sctp:\\`, you can monitor Stream Control Transmission Protocol (SCTP) endpoints at a very basic level:
+
+```yaml
+endpoints:
+  - name: example
+    url: "sctp://127.0.0.1:38412"
+    conditions:
+      - "[CONNECTED] == true"
+```
+
+Placeholders `[STATUS]` and `[BODY]` as well as the fields `endpoints[].body`, `endpoints[].headers`,
+`endpoints[].method` and `endpoints[].graphql` are not supported for SCTP endpoints.
+
+This works for SCTP based application.
 
 ### Monitoring an endpoint using ICMP
-By prefixing `endpoints[].url` with `icmp:\\`, you can monitor endpoints at a very basic level using ICMP, or more 
+By prefixing `endpoints[].url` with `icmp:\\`, you can monitor endpoints at a very basic level using ICMP, or more
 commonly known as "ping" or "echo":
 
 ```yaml
@@ -1231,7 +1366,6 @@ Defining a `dns` configuration in an endpoint will automatically mark said endpo
 endpoints:
   - name: example-dns-query
     url: "8.8.8.8" # Address of the DNS server to use
-    interval: 30s
     dns:
       query-name: "example.com"
       query-type: "A"
@@ -1242,12 +1376,12 @@ endpoints:
 
 There are two placeholders that can be used in the conditions for endpoints of type DNS:
 - The placeholder `[BODY]` resolves to the output of the query. For instance, a query of type `A` would return an IPv4.
-- The placeholder `[DNS_RCODE]` resolves to the name associated to the response code returned by the query, such as 
+- The placeholder `[DNS_RCODE]` resolves to the name associated to the response code returned by the query, such as
 `NOERROR`, `FORMERR`, `SERVFAIL`, `NXDOMAIN`, etc.
 
 
 ### Monitoring an endpoint using STARTTLS
-If you have an email server that you want to ensure there are no problems with, monitoring it through STARTTLS 
+If you have an email server that you want to ensure there are no problems with, monitoring it through STARTTLS
 will serve as a good initial indicator:
 ```yaml
 endpoints:
@@ -1277,14 +1411,33 @@ endpoints:
 ```
 
 
+### Monitoring domain expiration
+You can monitor the expiration of a domain with all endpoint types except for DNS by using the `[DOMAIN_EXPIRATION]`
+placeholder:
+```yaml
+endpoints:
+  - name: check-domain-and-certificate-expiration
+    url: "https://example.org"
+    interval: 1h
+    conditions:
+      - "[DOMAIN_EXPIRATION] > 720h"
+      - "[CERTIFICATE_EXPIRATION] > 240h"
+```
+
+**NOTE**: The usage of the `[DOMAIN_EXPIRATION]` placeholder requires Gatus to send a request to the official IANA WHOIS service [through a library](https://github.com/TwiN/whois)
+and in some cases, a secondary request to a TLD-specific WHOIS server (e.g. `whois.nic.sh`). 
+To prevent the WHOIS service from throttling your IP address if you send too many requests, Gatus will prevent you from
+using the `[DOMAIN_EXPIRATION]` placeholder on an endpoint with an interval of less than `5m`.
+
+
 ### disable-monitoring-lock
 Setting `disable-monitoring-lock` to `true` means that multiple endpoints could be monitored at the same time.
 
-While this behavior wouldn't generally be harmful, conditions using the `[RESPONSE_TIME]` placeholder could be impacted 
+While this behavior wouldn't generally be harmful, conditions using the `[RESPONSE_TIME]` placeholder could be impacted
 by the evaluation of multiple endpoints at the same time, therefore, the default value for this parameter is `false`.
 
 There are three main reasons why you might want to disable the monitoring lock:
-- You're using Gatus for load testing (each endpoint are periodically evaluated on a different goroutine, so 
+- You're using Gatus for load testing (each endpoint are periodically evaluated on a different goroutine, so
 technically, if you create 100 endpoints with a 1 seconds interval, Gatus will send 100 requests per second)
 - You have a _lot_ of endpoints to monitor
 - You want to test multiple endpoints at very short intervals (< 5s)
@@ -1348,7 +1501,7 @@ endpoints:
     conditions:
       - "[STATUS] == 200"
 
-  - name: random endpoint that isn't part of a group
+  - name: random endpoint that is not part of a group
     url: "https://example.org/"
     interval: 5m
     conditions:
@@ -1374,6 +1527,44 @@ web:
   port: ${PORT}
 ```
 
+
+### Keeping your configuration small
+While not specific to Gatus, you can leverage YAML anchors to create a default configuration.
+If you have a large configuration file, this should help you keep things clean.
+
+<details>
+  <summary>Example</summary>
+
+```yaml
+default-endpoint: &defaults
+  group: core
+  interval: 5m
+  client:
+    insecure: true
+    timeout: 30s
+  conditions:
+    - "[STATUS] == 200"
+
+endpoints:
+  - name: anchor-example-1
+    <<: *defaults               # This will merge the configuration under &defaults with this endpoint
+    url: "https://example.org"
+
+  - name: anchor-example-2
+    <<: *defaults 
+    group: example              # This will override the group defined in &defaults
+    url: "https://example.com"
+
+  - name: anchor-example-3
+    <<: *defaults
+    url: "https://twin.sh/health"
+    conditions:                # This will override the conditions defined in &defaults
+      - "[STATUS] == 200"
+      - "[BODY].status == UP"
+```
+</details>
+
+
 ### Badges
 #### Uptime
 ![Uptime 1h](https://status.twin.sh/api/v1/endpoints/core_blog-external/uptimes/1h/badge.svg)
@@ -1381,7 +1572,7 @@ web:
 ![Uptime 7d](https://status.twin.sh/api/v1/endpoints/core_blog-external/uptimes/7d/badge.svg)
 
 Gatus can automatically generate an SVG badge for one of your monitored endpoints.
-This allows you to put badges in your individual applications' README or even create your own status page if you 
+This allows you to put badges in your individual applications' README or even create your own status page if you
 desire.
 
 The path to generate a badge is the following:
@@ -1392,7 +1583,7 @@ Where:
 - `{duration}` is `7d`, `24h` or `1h`
 - `{key}` has the pattern `<GROUP_NAME>_<ENDPOINT_NAME>` in which both variables have ` `, `/`, `_`, `,` and `.` replaced by `-`.
 
-For instance, if you want the uptime during the last 24 hours from the endpoint `frontend` in the group `core`, 
+For instance, if you want the uptime during the last 24 hours from the endpoint `frontend` in the group `core`,
 the URL would look like this:
 ```
 https://example.com/api/v1/endpoints/core_frontend/uptimes/7d/badge.svg
@@ -1418,7 +1609,7 @@ The path to generate a badge is the following:
 Where:
 - `{key}` has the pattern `<GROUP_NAME>_<ENDPOINT_NAME>` in which both variables have ` `, `/`, `_`, `,` and `.` replaced by `-`.
 
-For instance, if you want the current status of the endpoint `frontend` in the group `core`, 
+For instance, if you want the current status of the endpoint `frontend` in the group `core`,
 the URL would look like this:
 ```
 https://example.com/api/v1/endpoints/core_frontend/health/badge.svg
@@ -1439,6 +1630,26 @@ Where:
 - `{key}` has the pattern `<GROUP_NAME>_<ENDPOINT_NAME>` in which both variables have ` `, `/`, `_`, `,` and `.` replaced by `-`.
 
 
+##### How to change the color thresholds of the response time badge  
+To change the response time badges' threshold, a corresponding configuration can be added to an endpoint.   
+The values in the array correspond to the levels [Awesome, Great, Good, Passable, Bad]  
+All five values must be given in milliseconds (ms).  
+
+```
+endpoints:
+- name: nas
+  group: internal
+  url: "https://example.org/"
+  interval: 5m
+  conditions:
+    - "[STATUS] == 200"
+  ui:
+    badge:
+      response-time:
+        thresholds: [550, 850, 1350, 1650, 1750]
+```
+
+
 ### API
 Gatus provides a simple read-only API that can be queried in order to programmatically determine endpoint status and history.
 
@@ -1456,12 +1667,12 @@ Example: https://status.twin.sh/api/v1/endpoints/core_blog-home/statuses
 
 Gzip compression will be used if the `Accept-Encoding` HTTP header contains `gzip`.
 
-The API will return a JSON payload with the `Content-Type` response header set to `application/json`. 
+The API will return a JSON payload with the `Content-Type` response header set to `application/json`.
 No such header is required to query the API.
 
 
 ### High level design overview
-![Gatus diagram](.github/assets/gatus-diagram.png)
+![Gatus diagram](.github/assets/gatus-diagram.jpg)
 
 
 ## Sponsors

alerting/alert/alert.go

@@ -17,6 +17,8 @@ type Alert struct {
 
 	// Enabled defines whether the alert is enabled
 	//
+	// Use Alert.IsEnabled() to retrieve the value of this field.
+	//
 	// This is a pointer, because it is populated by YAML and we need to know whether it was explicitly set to a value
 	// or not for provider.ParseWithDefaultAlert to work.
 	Enabled *bool `yaml:"enabled,omitempty"`
@@ -77,9 +79,10 @@ func (alert Alert) GetDescription() string {
 }
 
 // IsEnabled returns whether an alert is enabled or not
+// Returns true if not set
 func (alert Alert) IsEnabled() bool {
 	if alert.Enabled == nil {
-		return false
+		return true
 	}
 	return *alert.Enabled
 }

alerting/alert/alert_test.go

@@ -52,8 +52,8 @@ func TestAlert_ValidateAndSetDefaults(t *testing.T) {
 }
 
 func TestAlert_IsEnabled(t *testing.T) {
-	if (Alert{Enabled: nil}).IsEnabled() {
-		t.Error("alert.IsEnabled() should've returned false, because Enabled was set to nil")
+	if !(Alert{Enabled: nil}).IsEnabled() {
+		t.Error("alert.IsEnabled() should've returned true, because Enabled was set to nil")
 	}
 	if value := false; (Alert{Enabled: &value}).IsEnabled() {
 		t.Error("alert.IsEnabled() should've returned false, because Enabled was set to false")

alerting/alert/type.go

@@ -17,12 +17,21 @@ const (
 	// TypeGoogleChat is the Type for the googlechat alerting provider
 	TypeGoogleChat Type = "googlechat"
 
+	// TypeMatrix is the Type for the matrix alerting provider
+	TypeMatrix Type = "matrix"
+
 	// TypeMattermost is the Type for the mattermost alerting provider
 	TypeMattermost Type = "mattermost"
 
 	// TypeMessagebird is the Type for the messagebird alerting provider
 	TypeMessagebird Type = "messagebird"
 
+	// TypeNtfy is the Type for the ntfy alerting provider
+	TypeNtfy Type = "ntfy"
+
+	// TypeOpsgenie is the Type for the opsgenie alerting provider
+	TypeOpsgenie Type = "opsgenie"
+
 	// TypePagerDuty is the Type for the pagerduty alerting provider
 	TypePagerDuty Type = "pagerduty"
 
@@ -37,7 +46,4 @@ const (
 
 	// TypeTwilio is the Type for the twilio alerting provider
 	TypeTwilio Type = "twilio"
-
-	// TypeOpsgenie is the Type for the opsgenie alerting provider
-	TypeOpsgenie Type = "opsgenie"
 )

alerting/config.go

@@ -1,20 +1,22 @@
 package alerting
 
 import (
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/alerting/provider"
-	"github.com/TwiN/gatus/v4/alerting/provider/custom"
-	"github.com/TwiN/gatus/v4/alerting/provider/discord"
-	"github.com/TwiN/gatus/v4/alerting/provider/email"
-	"github.com/TwiN/gatus/v4/alerting/provider/googlechat"
-	"github.com/TwiN/gatus/v4/alerting/provider/mattermost"
-	"github.com/TwiN/gatus/v4/alerting/provider/messagebird"
-	"github.com/TwiN/gatus/v4/alerting/provider/opsgenie"
-	"github.com/TwiN/gatus/v4/alerting/provider/pagerduty"
-	"github.com/TwiN/gatus/v4/alerting/provider/slack"
-	"github.com/TwiN/gatus/v4/alerting/provider/teams"
-	"github.com/TwiN/gatus/v4/alerting/provider/telegram"
-	"github.com/TwiN/gatus/v4/alerting/provider/twilio"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/alerting/provider"
+	"github.com/TwiN/gatus/v5/alerting/provider/custom"
+	"github.com/TwiN/gatus/v5/alerting/provider/discord"
+	"github.com/TwiN/gatus/v5/alerting/provider/email"
+	"github.com/TwiN/gatus/v5/alerting/provider/googlechat"
+	"github.com/TwiN/gatus/v5/alerting/provider/matrix"
+	"github.com/TwiN/gatus/v5/alerting/provider/mattermost"
+	"github.com/TwiN/gatus/v5/alerting/provider/messagebird"
+	"github.com/TwiN/gatus/v5/alerting/provider/ntfy"
+	"github.com/TwiN/gatus/v5/alerting/provider/opsgenie"
+	"github.com/TwiN/gatus/v5/alerting/provider/pagerduty"
+	"github.com/TwiN/gatus/v5/alerting/provider/slack"
+	"github.com/TwiN/gatus/v5/alerting/provider/teams"
+	"github.com/TwiN/gatus/v5/alerting/provider/telegram"
+	"github.com/TwiN/gatus/v5/alerting/provider/twilio"
 )
 
 // Config is the configuration for alerting providers
@@ -22,7 +24,7 @@ type Config struct {
 	// Custom is the configuration for the custom alerting provider
 	Custom *custom.AlertProvider `yaml:"custom,omitempty"`
 
-	// googlechat is the configuration for the Google chat alerting provider
+	// GoogleChat is the configuration for the Google chat alerting provider
 	GoogleChat *googlechat.AlertProvider `yaml:"googlechat,omitempty"`
 
 	// Discord is the configuration for the discord alerting provider
@@ -31,12 +33,21 @@ type Config struct {
 	// Email is the configuration for the email alerting provider
 	Email *email.AlertProvider `yaml:"email,omitempty"`
 
+	// Matrix is the configuration for the matrix alerting provider
+	Matrix *matrix.AlertProvider `yaml:"matrix,omitempty"`
+
 	// Mattermost is the configuration for the mattermost alerting provider
 	Mattermost *mattermost.AlertProvider `yaml:"mattermost,omitempty"`
 
 	// Messagebird is the configuration for the messagebird alerting provider
 	Messagebird *messagebird.AlertProvider `yaml:"messagebird,omitempty"`
 
+	// Ntfy is the configuration for the ntfy alerting provider
+	Ntfy *ntfy.AlertProvider `yaml:"ntfy,omitempty"`
+
+	// Opsgenie is the configuration for the opsgenie alerting provider
+	Opsgenie *opsgenie.AlertProvider `yaml:"opsgenie,omitempty"`
+
 	// PagerDuty is the configuration for the pagerduty alerting provider
 	PagerDuty *pagerduty.AlertProvider `yaml:"pagerduty,omitempty"`
 
@@ -51,9 +62,6 @@ type Config struct {
 
 	// Twilio is the configuration for the twilio alerting provider
 	Twilio *twilio.AlertProvider `yaml:"twilio,omitempty"`
-
-	// Opsgenie is the configuration for the opsgenie alerting provider
-	Opsgenie *opsgenie.AlertProvider `yaml:"opsgenie,omitempty"`
 }
 
 // GetAlertingProviderByAlertType returns an provider.AlertProvider by its corresponding alert.Type
@@ -83,6 +91,12 @@ func (config Config) GetAlertingProviderByAlertType(alertType alert.Type) provid
 			return nil
 		}
 		return config.GoogleChat
+	case alert.TypeMatrix:
+		if config.Matrix == nil {
+			// Since we're returning an interface, we need to explicitly return nil, even if the provider itself is nil
+			return nil
+		}
+		return config.Matrix
 	case alert.TypeMattermost:
 		if config.Mattermost == nil {
 			// Since we're returning an interface, we need to explicitly return nil, even if the provider itself is nil
@@ -95,6 +109,12 @@ func (config Config) GetAlertingProviderByAlertType(alertType alert.Type) provid
 			return nil
 		}
 		return config.Messagebird
+	case alert.TypeNtfy:
+		if config.Ntfy == nil {
+			// Since we're returning an interface, we need to explicitly return nil, even if the provider itself is nil
+			return nil
+		}
+		return config.Ntfy
 	case alert.TypeOpsgenie:
 		if config.Opsgenie == nil {
 			// Since we're returning an interface, we need to explicitly return nil, even if the provider itself is nil

alerting/provider/custom/custom.go

@@ -7,9 +7,9 @@ import (
 	"net/http"
 	"strings"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
 )
 
 // AlertProvider is the configuration necessary for sending an alert using a custom HTTP request
@@ -84,6 +84,7 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 	if err != nil {
 		return err
 	}
+	defer response.Body.Close()
 	if response.StatusCode > 399 {
 		body, _ := io.ReadAll(response.Body)
 		return fmt.Errorf("call to provider alert returned status code %d: %s", response.StatusCode, string(body))

alerting/provider/custom/custom_test.go

@@ -6,21 +6,31 @@ import (
 	"net/http"
 	"testing"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v4/test"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
+	"github.com/TwiN/gatus/v5/test"
 )
 
 func TestAlertProvider_IsValid(t *testing.T) {
-	invalidProvider := AlertProvider{URL: ""}
-	if invalidProvider.IsValid() {
-		t.Error("provider shouldn't have been valid")
-	}
-	validProvider := AlertProvider{URL: "https://example.com"}
-	if !validProvider.IsValid() {
-		t.Error("provider should've been valid")
-	}
+	t.Run("invalid-provider", func(t *testing.T) {
+		invalidProvider := AlertProvider{URL: ""}
+		if invalidProvider.IsValid() {
+			t.Error("provider shouldn't have been valid")
+		}
+	})
+	t.Run("valid-provider", func(t *testing.T) {
+		validProvider := AlertProvider{URL: "https://example.com"}
+		if validProvider.ClientConfig != nil {
+			t.Error("provider client config should have been nil prior to IsValid() being executed")
+		}
+		if !validProvider.IsValid() {
+			t.Error("provider should've been valid")
+		}
+		if validProvider.ClientConfig == nil {
+			t.Error("provider client config should have been set after IsValid() was executed")
+		}
+	})
 }
 
 func TestAlertProvider_Send(t *testing.T) {

alerting/provider/discord/discord.go

@@ -2,13 +2,14 @@ package discord
 
 import (
 	"bytes"
+	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
 )
 
 // AlertProvider is the configuration necessary for sending an alert using Discord
@@ -44,7 +45,7 @@ func (provider *AlertProvider) IsValid() bool {
 
 // Send an alert using the provider
 func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
-	buffer := bytes.NewBuffer([]byte(provider.buildRequestBody(endpoint, alert, result, resolved)))
+	buffer := bytes.NewBuffer(provider.buildRequestBody(endpoint, alert, result, resolved))
 	request, err := http.NewRequest(http.MethodPost, provider.getWebhookURLForGroup(endpoint.Group), buffer)
 	if err != nil {
 		return err
@@ -54,6 +55,7 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 	if err != nil {
 		return err
 	}
+	defer response.Body.Close()
 	if response.StatusCode > 399 {
 		body, _ := io.ReadAll(response.Body)
 		return fmt.Errorf("call to provider alert returned status code %d: %s", response.StatusCode, string(body))
@@ -61,8 +63,26 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 	return err
 }
 
+type Body struct {
+	Content string  `json:"content"`
+	Embeds  []Embed `json:"embeds"`
+}
+
+type Embed struct {
+	Title       string  `json:"title"`
+	Description string  `json:"description"`
+	Color       int     `json:"color"`
+	Fields      []Field `json:"fields"`
+}
+
+type Field struct {
+	Name   string `json:"name"`
+	Value  string `json:"value"`
+	Inline bool   `json:"inline"`
+}
+
 // buildRequestBody builds the request body for the provider
-func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) string {
+func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) []byte {
 	var message, results string
 	var colorCode int
 	if resolved {
@@ -79,29 +99,30 @@ func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *
 		} else {
 			prefix = ":x:"
 		}
-		results += fmt.Sprintf("%s - `%s`\\n", prefix, conditionResult.Condition)
+		results += fmt.Sprintf("%s - `%s`\n", prefix, conditionResult.Condition)
 	}
 	var description string
 	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
-		description = ":\\n> " + alertDescription
+		description = ":\n> " + alertDescription
 	}
-	return fmt.Sprintf(`{
-  "content": "",
-  "embeds": [
-    {
-      "title": ":helmet_with_white_cross: Gatus",
-      "description": "%s%s",
-      "color": %d,
-      "fields": [
-        {
-          "name": "Condition results",
-          "value": "%s",
-          "inline": false
-        }
-      ]
-    }
-  ]
-}`, message, description, colorCode, results)
+	body, _ := json.Marshal(Body{
+		Content: "",
+		Embeds: []Embed{
+			{
+				Title:       ":helmet_with_white_cross: Gatus",
+				Description: message + description,
+				Color:       colorCode,
+				Fields: []Field{
+					{
+						Name:   "Condition results",
+						Value:  results,
+						Inline: false,
+					},
+				},
+			},
+		},
+	})
+	return body
 }
 
 // getWebhookURLForGroup returns the appropriate Webhook URL integration to for a given group

alerting/provider/discord/discord_test.go

@@ -5,10 +5,10 @@ import (
 	"net/http"
 	"testing"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v4/test"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
+	"github.com/TwiN/gatus/v5/test"
 )
 
 func TestAlertProvider_IsValid(t *testing.T) {
@@ -151,14 +151,14 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 			Provider:     AlertProvider{},
 			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     false,
-			ExpectedBody: "{\n  \"content\": \"\",\n  \"embeds\": [\n    {\n      \"title\": \":helmet_with_white_cross: Gatus\",\n      \"description\": \"An alert for **endpoint-name** has been triggered due to having failed 3 time(s) in a row:\\n> description-1\",\n      \"color\": 15158332,\n      \"fields\": [\n        {\n          \"name\": \"Condition results\",\n          \"value\": \":x: - `[CONNECTED] == true`\\n:x: - `[STATUS] == 200`\\n\",\n          \"inline\": false\n        }\n      ]\n    }\n  ]\n}",
+			ExpectedBody: "{\"content\":\"\",\"embeds\":[{\"title\":\":helmet_with_white_cross: Gatus\",\"description\":\"An alert for **endpoint-name** has been triggered due to having failed 3 time(s) in a row:\\n\\u003e description-1\",\"color\":15158332,\"fields\":[{\"name\":\"Condition results\",\"value\":\":x: - `[CONNECTED] == true`\\n:x: - `[STATUS] == 200`\\n:x: - `[BODY] != \\\"\\\"`\\n\",\"inline\":false}]}]}",
 		},
 		{
 			Name:         "resolved",
 			Provider:     AlertProvider{},
 			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     true,
-			ExpectedBody: "{\n  \"content\": \"\",\n  \"embeds\": [\n    {\n      \"title\": \":helmet_with_white_cross: Gatus\",\n      \"description\": \"An alert for **endpoint-name** has been resolved after passing successfully 5 time(s) in a row:\\n> description-2\",\n      \"color\": 3066993,\n      \"fields\": [\n        {\n          \"name\": \"Condition results\",\n          \"value\": \":white_check_mark: - `[CONNECTED] == true`\\n:white_check_mark: - `[STATUS] == 200`\\n\",\n          \"inline\": false\n        }\n      ]\n    }\n  ]\n}",
+			ExpectedBody: "{\"content\":\"\",\"embeds\":[{\"title\":\":helmet_with_white_cross: Gatus\",\"description\":\"An alert for **endpoint-name** has been resolved after passing successfully 5 time(s) in a row:\\n\\u003e description-2\",\"color\":3066993,\"fields\":[{\"name\":\"Condition results\",\"value\":\":white_check_mark: - `[CONNECTED] == true`\\n:white_check_mark: - `[STATUS] == 200`\\n:white_check_mark: - `[BODY] != \\\"\\\"`\\n\",\"inline\":false}]}]}",
 		},
 	}
 	for _, scenario := range scenarios {
@@ -170,15 +170,16 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 					ConditionResults: []*core.ConditionResult{
 						{Condition: "[CONNECTED] == true", Success: scenario.Resolved},
 						{Condition: "[STATUS] == 200", Success: scenario.Resolved},
+						{Condition: "[BODY] != \"\"", Success: scenario.Resolved},
 					},
 				},
 				scenario.Resolved,
 			)
-			if body != scenario.ExpectedBody {
-				t.Errorf("expected %s, got %s", scenario.ExpectedBody, body)
+			if string(body) != scenario.ExpectedBody {
+				t.Errorf("expected:\n%s\ngot:\n%s", scenario.ExpectedBody, body)
 			}
 			out := make(map[string]interface{})
-			if err := json.Unmarshal([]byte(body), &out); err != nil {
+			if err := json.Unmarshal(body, &out); err != nil {
 				t.Error("expected body to be valid JSON, got error:", err.Error())
 			}
 		})

alerting/provider/email/email.go

@@ -5,8 +5,8 @@ import (
 	"math"
 	"strings"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/core"
 	gomail "gopkg.in/mail.v2"
 )
 

alerting/provider/email/email_test.go

@@ -3,8 +3,8 @@ package email
 import (
 	"testing"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/core"
 )
 
 func TestAlertDefaultProvider_IsValid(t *testing.T) {

alerting/provider/googlechat/googlechat.go

@@ -2,13 +2,14 @@ package googlechat
 
 import (
 	"bytes"
+	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
 )
 
 // AlertProvider is the configuration necessary for sending an alert using Google chat
@@ -36,7 +37,6 @@ func (provider *AlertProvider) IsValid() bool {
 	if provider.ClientConfig == nil {
 		provider.ClientConfig = client.GetDefaultConfig()
 	}
-
 	registeredGroups := make(map[string]bool)
 	if provider.Overrides != nil {
 		for _, override := range provider.Overrides {
@@ -46,13 +46,12 @@ func (provider *AlertProvider) IsValid() bool {
 			registeredGroups[override.Group] = true
 		}
 	}
-
 	return len(provider.WebhookURL) > 0
 }
 
 // Send an alert using the provider
 func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
-	buffer := bytes.NewBuffer([]byte(provider.buildRequestBody(endpoint, alert, result, resolved)))
+	buffer := bytes.NewBuffer(provider.buildRequestBody(endpoint, alert, result, resolved))
 	request, err := http.NewRequest(http.MethodPost, provider.getWebhookURLForGroup(endpoint.Group), buffer)
 	if err != nil {
 		return err
@@ -62,6 +61,7 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 	if err != nil {
 		return err
 	}
+	defer response.Body.Close()
 	if response.StatusCode > 399 {
 		body, _ := io.ReadAll(response.Body)
 		return fmt.Errorf("call to provider alert returned status code %d: %s", response.StatusCode, string(body))
@@ -69,8 +69,50 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 	return err
 }
 
+type Body struct {
+	Cards []Cards `json:"cards"`
+}
+
+type Cards struct {
+	Sections []Sections `json:"sections"`
+}
+
+type Sections struct {
+	Widgets []Widgets `json:"widgets"`
+}
+
+type Widgets struct {
+	KeyValue *KeyValue `json:"keyValue,omitempty"`
+	Buttons  []Buttons `json:"buttons,omitempty"`
+}
+
+type KeyValue struct {
+	TopLabel         string `json:"topLabel,omitempty"`
+	Content          string `json:"content,omitempty"`
+	ContentMultiline string `json:"contentMultiline,omitempty"`
+	BottomLabel      string `json:"bottomLabel,omitempty"`
+	Icon             string `json:"icon,omitempty"`
+}
+
+type Buttons struct {
+	TextButton TextButton `json:"textButton"`
+}
+
+type TextButton struct {
+	Text    string  `json:"text"`
+	OnClick OnClick `json:"onClick"`
+}
+
+type OnClick struct {
+	OpenLink OpenLink `json:"openLink"`
+}
+
+type OpenLink struct {
+	URL string `json:"url"`
+}
+
 // buildRequestBody builds the request body for the provider
-func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) string {
+func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) []byte {
 	var message, color string
 	if resolved {
 		color = "#36A64F"
@@ -93,49 +135,52 @@ func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *
 	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
 		description = ":: " + alertDescription
 	}
-	return fmt.Sprintf(`{
-    "cards": [
-  {
-    "sections": [
-      {
-        "widgets": [
-          {
-            "keyValue": {
-              "topLabel": "%s [%s]",
-              "content": "%s",
-              "contentMultiline": "true",
-              "bottomLabel": "%s",
-              "icon": "BOOKMARK"
-            }
-          },
-          {
-            "keyValue": {
-              "topLabel": "Condition results",
-              "content": "%s",
-              "contentMultiline": "true",
-              "icon": "DESCRIPTION"
-            }
-          },
-          {
-            "buttons": [
-              {
-                "textButton": {
-                  "text": "URL",
-                  "onClick": {
-                    "openLink": {
-                      "url": "%s"
-                    }
-                  }
-                }
-              }
-            ]
-          }
-        ]
-      }
-    ]
-  }
-]
-}`, endpoint.Name, endpoint.Group, message, description, results, endpoint.URL)
+	payload := Body{
+		Cards: []Cards{
+			{
+				Sections: []Sections{
+					{
+						Widgets: []Widgets{
+							{
+								KeyValue: &KeyValue{
+									TopLabel:         endpoint.DisplayName(),
+									Content:          message,
+									ContentMultiline: "true",
+									BottomLabel:      description,
+									Icon:             "BOOKMARK",
+								},
+							},
+							{
+								KeyValue: &KeyValue{
+									TopLabel:         "Condition results",
+									Content:          results,
+									ContentMultiline: "true",
+									Icon:             "DESCRIPTION",
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+	if endpoint.Type() == core.EndpointTypeHTTP {
+		// We only include a button targeting the URL if the endpoint is an HTTP endpoint
+		// If the URL isn't prefixed with https://, Google Chat will just display a blank message aynways.
+		// See https://github.com/TwiN/gatus/issues/362
+		payload.Cards[0].Sections[0].Widgets = append(payload.Cards[0].Sections[0].Widgets, Widgets{
+			Buttons: []Buttons{
+				{
+					TextButton: TextButton{
+						Text:    "URL",
+						OnClick: OnClick{OpenLink: OpenLink{URL: endpoint.URL}},
+					},
+				},
+			},
+		})
+	}
+	body, _ := json.Marshal(payload)
+	return body
 }
 
 // getWebhookURLForGroup returns the appropriate Webhook URL integration to for a given group

alerting/provider/googlechat/googlechat_test.go

@@ -5,10 +5,10 @@ import (
 	"net/http"
 	"testing"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v4/test"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
+	"github.com/TwiN/gatus/v5/test"
 )
 
 func TestAlertDefaultProvider_IsValid(t *testing.T) {
@@ -141,6 +141,7 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 	secondDescription := "description-2"
 	scenarios := []struct {
 		Name         string
+		Endpoint     core.Endpoint
 		Provider     AlertProvider
 		Alert        alert.Alert
 		Resolved     bool
@@ -148,23 +149,41 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 	}{
 		{
 			Name:         "triggered",
+			Endpoint:     core.Endpoint{Name: "endpoint-name", URL: "https://example.org"},
 			Provider:     AlertProvider{},
 			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     false,
-			ExpectedBody: "{\n    \"cards\": [\n  {\n    \"sections\": [\n      {\n        \"widgets\": [\n          {\n            \"keyValue\": {\n              \"topLabel\": \"endpoint-name []\",\n              \"content\": \"\u003cfont color='#DD0000'\u003eAn alert has been triggered due to having failed 3 time(s) in a row\u003c/font\u003e\",\n              \"contentMultiline\": \"true\",\n              \"bottomLabel\": \":: description-1\",\n              \"icon\": \"BOOKMARK\"\n            }\n          },\n          {\n            \"keyValue\": {\n              \"topLabel\": \"Condition results\",\n              \"content\": \"❌   [CONNECTED] == true\u003cbr\u003e❌   [STATUS] == 200\u003cbr\u003e\",\n              \"contentMultiline\": \"true\",\n              \"icon\": \"DESCRIPTION\"\n            }\n          },\n          {\n            \"buttons\": [\n              {\n                \"textButton\": {\n                  \"text\": \"URL\",\n                  \"onClick\": {\n                    \"openLink\": {\n                      \"url\": \"\"\n                    }\n                  }\n                }\n              }\n            ]\n          }\n        ]\n      }\n    ]\n  }\n]\n}",
+			ExpectedBody: `{"cards":[{"sections":[{"widgets":[{"keyValue":{"topLabel":"endpoint-name","content":"\u003cfont color='#DD0000'\u003eAn alert has been triggered due to having failed 3 time(s) in a row\u003c/font\u003e","contentMultiline":"true","bottomLabel":":: description-1","icon":"BOOKMARK"}},{"keyValue":{"topLabel":"Condition results","content":"❌   [CONNECTED] == true\u003cbr\u003e❌   [STATUS] == 200\u003cbr\u003e","contentMultiline":"true","icon":"DESCRIPTION"}},{"buttons":[{"textButton":{"text":"URL","onClick":{"openLink":{"url":"https://example.org"}}}}]}]}]}]}`,
 		},
 		{
 			Name:         "resolved",
+			Endpoint:     core.Endpoint{Name: "endpoint-name", URL: "https://example.org"},
 			Provider:     AlertProvider{},
 			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     true,
-			ExpectedBody: "{\n    \"cards\": [\n  {\n    \"sections\": [\n      {\n        \"widgets\": [\n          {\n            \"keyValue\": {\n              \"topLabel\": \"endpoint-name []\",\n              \"content\": \"\u003cfont color='#36A64F'\u003eAn alert has been resolved after passing successfully 5 time(s) in a row\u003c/font\u003e\",\n              \"contentMultiline\": \"true\",\n              \"bottomLabel\": \":: description-2\",\n              \"icon\": \"BOOKMARK\"\n            }\n          },\n          {\n            \"keyValue\": {\n              \"topLabel\": \"Condition results\",\n              \"content\": \"✅   [CONNECTED] == true\u003cbr\u003e✅   [STATUS] == 200\u003cbr\u003e\",\n              \"contentMultiline\": \"true\",\n              \"icon\": \"DESCRIPTION\"\n            }\n          },\n          {\n            \"buttons\": [\n              {\n                \"textButton\": {\n                  \"text\": \"URL\",\n                  \"onClick\": {\n                    \"openLink\": {\n                      \"url\": \"\"\n                    }\n                  }\n                }\n              }\n            ]\n          }\n        ]\n      }\n    ]\n  }\n]\n}",
+			ExpectedBody: `{"cards":[{"sections":[{"widgets":[{"keyValue":{"topLabel":"endpoint-name","content":"\u003cfont color='#36A64F'\u003eAn alert has been resolved after passing successfully 5 time(s) in a row\u003c/font\u003e","contentMultiline":"true","bottomLabel":":: description-2","icon":"BOOKMARK"}},{"keyValue":{"topLabel":"Condition results","content":"✅   [CONNECTED] == true\u003cbr\u003e✅   [STATUS] == 200\u003cbr\u003e","contentMultiline":"true","icon":"DESCRIPTION"}},{"buttons":[{"textButton":{"text":"URL","onClick":{"openLink":{"url":"https://example.org"}}}}]}]}]}]}`,
+		},
+		{
+			Name:         "icmp-should-not-include-url", // See https://github.com/TwiN/gatus/issues/362
+			Endpoint:     core.Endpoint{Name: "endpoint-name", URL: "icmp://example.org"},
+			Provider:     AlertProvider{},
+			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:     false,
+			ExpectedBody: `{"cards":[{"sections":[{"widgets":[{"keyValue":{"topLabel":"endpoint-name","content":"\u003cfont color='#DD0000'\u003eAn alert has been triggered due to having failed 3 time(s) in a row\u003c/font\u003e","contentMultiline":"true","bottomLabel":":: description-1","icon":"BOOKMARK"}},{"keyValue":{"topLabel":"Condition results","content":"❌   [CONNECTED] == true\u003cbr\u003e❌   [STATUS] == 200\u003cbr\u003e","contentMultiline":"true","icon":"DESCRIPTION"}}]}]}]}`,
+		},
+		{
+			Name:         "tcp-should-not-include-url", // See https://github.com/TwiN/gatus/issues/362
+			Endpoint:     core.Endpoint{Name: "endpoint-name", URL: "tcp://example.org"},
+			Provider:     AlertProvider{},
+			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:     false,
+			ExpectedBody: `{"cards":[{"sections":[{"widgets":[{"keyValue":{"topLabel":"endpoint-name","content":"\u003cfont color='#DD0000'\u003eAn alert has been triggered due to having failed 3 time(s) in a row\u003c/font\u003e","contentMultiline":"true","bottomLabel":":: description-1","icon":"BOOKMARK"}},{"keyValue":{"topLabel":"Condition results","content":"❌   [CONNECTED] == true\u003cbr\u003e❌   [STATUS] == 200\u003cbr\u003e","contentMultiline":"true","icon":"DESCRIPTION"}}]}]}]}`,
 		},
 	}
 	for _, scenario := range scenarios {
 		t.Run(scenario.Name, func(t *testing.T) {
 			body := scenario.Provider.buildRequestBody(
-				&core.Endpoint{Name: "endpoint-name"},
+				&scenario.Endpoint,
 				&scenario.Alert,
 				&core.Result{
 					ConditionResults: []*core.ConditionResult{
@@ -174,13 +193,11 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 				},
 				scenario.Resolved,
 			)
-			b, _ := json.Marshal(body)
-			e, _ := json.Marshal(scenario.ExpectedBody)
-			if body != scenario.ExpectedBody {
-				t.Errorf("expected %s, got %s", e, b)
+			if string(body) != scenario.ExpectedBody {
+				t.Errorf("expected:\n%s\ngot:\n%s", scenario.ExpectedBody, body)
 			}
 			out := make(map[string]interface{})
-			if err := json.Unmarshal([]byte(body), &out); err != nil {
+			if err := json.Unmarshal(body, &out); err != nil {
 				t.Error("expected body to be valid JSON, got error:", err.Error())
 			}
 		})

alerting/provider/matrix/matrix.go

@@ -0,0 +1,190 @@
+package matrix
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"math/rand"
+	"net/http"
+	"net/url"
+	"time"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
+)
+
+// AlertProvider is the configuration necessary for sending an alert using Matrix
+type AlertProvider struct {
+	MatrixProviderConfig `yaml:",inline"`
+
+	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
+	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group string `yaml:"group"`
+
+	MatrixProviderConfig `yaml:",inline"`
+}
+
+const defaultHomeserverURL = "https://matrix-client.matrix.org"
+
+type MatrixProviderConfig struct {
+	// ServerURL is the custom homeserver to use (optional)
+	ServerURL string `yaml:"server-url"`
+
+	// AccessToken is the bot user's access token to send messages
+	AccessToken string `yaml:"access-token"`
+
+	// InternalRoomID is the room that the bot user has permissions to send messages to
+	InternalRoomID string `yaml:"internal-room-id"`
+}
+
+// IsValid returns whether the provider's configuration is valid
+func (provider *AlertProvider) IsValid() bool {
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" || len(override.AccessToken) == 0 || len(override.InternalRoomID) == 0 {
+				return false
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
+	return len(provider.AccessToken) > 0 && len(provider.InternalRoomID) > 0
+}
+
+// Send an alert using the provider
+func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
+	buffer := bytes.NewBuffer(provider.buildRequestBody(endpoint, alert, result, resolved))
+	config := provider.getConfigForGroup(endpoint.Group)
+	if config.ServerURL == "" {
+		config.ServerURL = defaultHomeserverURL
+	}
+	// The Matrix endpoint requires a unique transaction ID for each event sent
+	txnId := randStringBytes(24)
+	request, err := http.NewRequest(
+		http.MethodPut,
+		fmt.Sprintf("%s/_matrix/client/v3/rooms/%s/send/m.room.message/%s?access_token=%s",
+			config.ServerURL,
+			url.PathEscape(config.InternalRoomID),
+			txnId,
+			url.QueryEscape(config.AccessToken),
+		),
+		buffer,
+	)
+	if err != nil {
+		return err
+	}
+	request.Header.Set("Content-Type", "application/json")
+	response, err := client.GetHTTPClient(nil).Do(request)
+	if err != nil {
+		return err
+	}
+	defer response.Body.Close()
+	if response.StatusCode > 399 {
+		body, _ := io.ReadAll(response.Body)
+		return fmt.Errorf("call to provider alert returned status code %d: %s", response.StatusCode, string(body))
+	}
+	return err
+}
+
+type Body struct {
+	MsgType       string `json:"msgtype"`
+	Format        string `json:"format"`
+	Body          string `json:"body"`
+	FormattedBody string `json:"formatted_body"`
+}
+
+// buildRequestBody builds the request body for the provider
+func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) []byte {
+	body, _ := json.Marshal(Body{
+		MsgType:       "m.text",
+		Format:        "org.matrix.custom.html",
+		Body:          buildPlaintextMessageBody(endpoint, alert, result, resolved),
+		FormattedBody: buildHTMLMessageBody(endpoint, alert, result, resolved),
+	})
+	return body
+}
+
+// buildPlaintextMessageBody builds the message body in plaintext to include in request
+func buildPlaintextMessageBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) string {
+	var message, results string
+	if resolved {
+		message = fmt.Sprintf("An alert for `%s` has been resolved after passing successfully %d time(s) in a row", endpoint.DisplayName(), alert.SuccessThreshold)
+	} else {
+		message = fmt.Sprintf("An alert for `%s` has been triggered due to having failed %d time(s) in a row", endpoint.DisplayName(), alert.FailureThreshold)
+	}
+	for _, conditionResult := range result.ConditionResults {
+		var prefix string
+		if conditionResult.Success {
+			prefix = "✓"
+		} else {
+			prefix = "✕"
+		}
+		results += fmt.Sprintf("\n%s - %s", prefix, conditionResult.Condition)
+	}
+	var description string
+	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
+		description = "\n" + alertDescription
+	}
+	return fmt.Sprintf("%s%s\n%s", message, description, results)
+}
+
+// buildHTMLMessageBody builds the message body in HTML to include in request
+func buildHTMLMessageBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) string {
+	var message, results string
+	if resolved {
+		message = fmt.Sprintf("An alert for <code>%s</code> has been resolved after passing successfully %d time(s) in a row", endpoint.DisplayName(), alert.SuccessThreshold)
+	} else {
+		message = fmt.Sprintf("An alert for <code>%s</code> has been triggered due to having failed %d time(s) in a row", endpoint.DisplayName(), alert.FailureThreshold)
+	}
+	for _, conditionResult := range result.ConditionResults {
+		var prefix string
+		if conditionResult.Success {
+			prefix = "✅"
+		} else {
+			prefix = "❌"
+		}
+		results += fmt.Sprintf("<li>%s - <code>%s</code></li>", prefix, conditionResult.Condition)
+	}
+	var description string
+	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
+		description = fmt.Sprintf("\n<blockquote>%s</blockquote>", alertDescription)
+	}
+	return fmt.Sprintf("<h3>%s</h3>%s\n<h5>Condition results</h5><ul>%s</ul>", message, description, results)
+}
+
+// getConfigForGroup returns the appropriate configuration for a given group
+func (provider *AlertProvider) getConfigForGroup(group string) MatrixProviderConfig {
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				return override.MatrixProviderConfig
+			}
+		}
+	}
+	return provider.MatrixProviderConfig
+}
+
+func randStringBytes(n int) string {
+	// All the compatible characters to use in a transaction ID
+	const availableCharacterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+	b := make([]byte, n)
+	rand.Seed(time.Now().UnixNano())
+	for i := range b {
+		b[i] = availableCharacterBytes[rand.Intn(len(availableCharacterBytes))]
+	}
+	return string(b)
+}
+
+// GetDefaultAlert returns the provider's default alert configuration
+func (provider AlertProvider) GetDefaultAlert() *alert.Alert {
+	return provider.DefaultAlert
+}

alerting/provider/matrix/matrix_test.go

@@ -0,0 +1,331 @@
+package matrix
+
+import (
+	"encoding/json"
+	"net/http"
+	"testing"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
+	"github.com/TwiN/gatus/v5/test"
+)
+
+func TestAlertProvider_IsValid(t *testing.T) {
+	invalidProvider := AlertProvider{
+		MatrixProviderConfig: MatrixProviderConfig{
+			AccessToken:    "",
+			InternalRoomID: "",
+		},
+	}
+	if invalidProvider.IsValid() {
+		t.Error("provider shouldn't have been valid")
+	}
+	validProvider := AlertProvider{
+		MatrixProviderConfig: MatrixProviderConfig{
+			AccessToken:    "1",
+			InternalRoomID: "!a:example.com",
+		},
+	}
+	if !validProvider.IsValid() {
+		t.Error("provider should've been valid")
+	}
+	validProviderWithHomeserver := AlertProvider{
+		MatrixProviderConfig: MatrixProviderConfig{
+			ServerURL:      "https://example.com",
+			AccessToken:    "1",
+			InternalRoomID: "!a:example.com",
+		},
+	}
+	if !validProviderWithHomeserver.IsValid() {
+		t.Error("provider with homeserver should've been valid")
+	}
+}
+
+func TestAlertProvider_IsValidWithOverride(t *testing.T) {
+	providerWithInvalidOverrideGroup := AlertProvider{
+		Overrides: []Override{
+			{
+				Group: "",
+				MatrixProviderConfig: MatrixProviderConfig{
+					AccessToken:    "",
+					InternalRoomID: "",
+				},
+			},
+		},
+	}
+	if providerWithInvalidOverrideGroup.IsValid() {
+		t.Error("provider Group shouldn't have been valid")
+	}
+	providerWithInvalidOverrideTo := AlertProvider{
+		Overrides: []Override{
+			{
+				Group: "group",
+				MatrixProviderConfig: MatrixProviderConfig{
+					AccessToken:    "",
+					InternalRoomID: "",
+				},
+			},
+		},
+	}
+	if providerWithInvalidOverrideTo.IsValid() {
+		t.Error("provider integration key shouldn't have been valid")
+	}
+	providerWithValidOverride := AlertProvider{
+		MatrixProviderConfig: MatrixProviderConfig{
+			AccessToken:    "1",
+			InternalRoomID: "!a:example.com",
+		},
+		Overrides: []Override{
+			{
+				Group: "group",
+				MatrixProviderConfig: MatrixProviderConfig{
+					ServerURL:      "https://example.com",
+					AccessToken:    "1",
+					InternalRoomID: "!a:example.com",
+				},
+			},
+		},
+	}
+	if !providerWithValidOverride.IsValid() {
+		t.Error("provider should've been valid")
+	}
+}
+
+func TestAlertProvider_Send(t *testing.T) {
+	defer client.InjectHTTPClient(nil)
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		Name             string
+		Provider         AlertProvider
+		Alert            alert.Alert
+		Resolved         bool
+		MockRoundTripper test.MockRoundTripper
+		ExpectedError    bool
+	}{
+		{
+			Name:     "triggered",
+			Provider: AlertProvider{},
+			Alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: false,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			ExpectedError: false,
+		},
+		{
+			Name:     "triggered-error",
+			Provider: AlertProvider{},
+			Alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: false,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusInternalServerError, Body: http.NoBody}
+			}),
+			ExpectedError: true,
+		},
+		{
+			Name:     "resolved",
+			Provider: AlertProvider{},
+			Alert:    alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: true,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			ExpectedError: false,
+		},
+		{
+			Name:     "resolved-error",
+			Provider: AlertProvider{},
+			Alert:    alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: true,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusInternalServerError, Body: http.NoBody}
+			}),
+			ExpectedError: true,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			client.InjectHTTPClient(&http.Client{Transport: scenario.MockRoundTripper})
+			err := scenario.Provider.Send(
+				&core.Endpoint{Name: "endpoint-name"},
+				&scenario.Alert,
+				&core.Result{
+					ConditionResults: []*core.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.Resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.Resolved},
+					},
+				},
+				scenario.Resolved,
+			)
+			if scenario.ExpectedError && err == nil {
+				t.Error("expected error, got none")
+			}
+			if !scenario.ExpectedError && err != nil {
+				t.Error("expected no error, got", err.Error())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_buildRequestBody(t *testing.T) {
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		Name         string
+		Provider     AlertProvider
+		Alert        alert.Alert
+		Resolved     bool
+		ExpectedBody string
+	}{
+		{
+			Name:         "triggered",
+			Provider:     AlertProvider{},
+			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:     false,
+			ExpectedBody: "{\"msgtype\":\"m.text\",\"format\":\"org.matrix.custom.html\",\"body\":\"An alert for `endpoint-name` has been triggered due to having failed 3 time(s) in a row\\ndescription-1\\n\\n✕ - [CONNECTED] == true\\n✕ - [STATUS] == 200\",\"formatted_body\":\"\\u003ch3\\u003eAn alert for \\u003ccode\\u003eendpoint-name\\u003c/code\\u003e has been triggered due to having failed 3 time(s) in a row\\u003c/h3\\u003e\\n\\u003cblockquote\\u003edescription-1\\u003c/blockquote\\u003e\\n\\u003ch5\\u003eCondition results\\u003c/h5\\u003e\\u003cul\\u003e\\u003cli\\u003e❌ - \\u003ccode\\u003e[CONNECTED] == true\\u003c/code\\u003e\\u003c/li\\u003e\\u003cli\\u003e❌ - \\u003ccode\\u003e[STATUS] == 200\\u003c/code\\u003e\\u003c/li\\u003e\\u003c/ul\\u003e\"}",
+		},
+		{
+			Name:         "resolved",
+			Provider:     AlertProvider{},
+			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:     true,
+			ExpectedBody: "{\"msgtype\":\"m.text\",\"format\":\"org.matrix.custom.html\",\"body\":\"An alert for `endpoint-name` has been resolved after passing successfully 5 time(s) in a row\\ndescription-2\\n\\n✓ - [CONNECTED] == true\\n✓ - [STATUS] == 200\",\"formatted_body\":\"\\u003ch3\\u003eAn alert for \\u003ccode\\u003eendpoint-name\\u003c/code\\u003e has been resolved after passing successfully 5 time(s) in a row\\u003c/h3\\u003e\\n\\u003cblockquote\\u003edescription-2\\u003c/blockquote\\u003e\\n\\u003ch5\\u003eCondition results\\u003c/h5\\u003e\\u003cul\\u003e\\u003cli\\u003e✅ - \\u003ccode\\u003e[CONNECTED] == true\\u003c/code\\u003e\\u003c/li\\u003e\\u003cli\\u003e✅ - \\u003ccode\\u003e[STATUS] == 200\\u003c/code\\u003e\\u003c/li\\u003e\\u003c/ul\\u003e\"}",
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			body := scenario.Provider.buildRequestBody(
+				&core.Endpoint{Name: "endpoint-name"},
+				&scenario.Alert,
+				&core.Result{
+					ConditionResults: []*core.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.Resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.Resolved},
+					},
+				},
+				scenario.Resolved,
+			)
+			if string(body) != scenario.ExpectedBody {
+				t.Errorf("expected:\n%s\ngot:\n%s", scenario.ExpectedBody, body)
+			}
+			out := make(map[string]interface{})
+			if err := json.Unmarshal(body, &out); err != nil {
+				t.Error("expected body to be valid JSON, got error:", err.Error())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_GetDefaultAlert(t *testing.T) {
+	if (AlertProvider{DefaultAlert: &alert.Alert{}}).GetDefaultAlert() == nil {
+		t.Error("expected default alert to be not nil")
+	}
+	if (AlertProvider{DefaultAlert: nil}).GetDefaultAlert() != nil {
+		t.Error("expected default alert to be nil")
+	}
+}
+
+func TestAlertProvider_getConfigForGroup(t *testing.T) {
+	tests := []struct {
+		Name           string
+		Provider       AlertProvider
+		InputGroup     string
+		ExpectedOutput MatrixProviderConfig
+	}{
+		{
+			Name: "provider-no-override-specify-no-group-should-default",
+			Provider: AlertProvider{
+				MatrixProviderConfig: MatrixProviderConfig{
+					ServerURL:      "https://example.com",
+					AccessToken:    "1",
+					InternalRoomID: "!a:example.com",
+				},
+				Overrides: nil,
+			},
+			InputGroup: "",
+			ExpectedOutput: MatrixProviderConfig{
+				ServerURL:      "https://example.com",
+				AccessToken:    "1",
+				InternalRoomID: "!a:example.com",
+			},
+		},
+		{
+			Name: "provider-no-override-specify-group-should-default",
+			Provider: AlertProvider{
+				MatrixProviderConfig: MatrixProviderConfig{
+					ServerURL:      "https://example.com",
+					AccessToken:    "1",
+					InternalRoomID: "!a:example.com",
+				},
+				Overrides: nil,
+			},
+			InputGroup: "group",
+			ExpectedOutput: MatrixProviderConfig{
+				ServerURL:      "https://example.com",
+				AccessToken:    "1",
+				InternalRoomID: "!a:example.com",
+			},
+		},
+		{
+			Name: "provider-with-override-specify-no-group-should-default",
+			Provider: AlertProvider{
+				MatrixProviderConfig: MatrixProviderConfig{
+					ServerURL:      "https://example.com",
+					AccessToken:    "1",
+					InternalRoomID: "!a:example.com",
+				},
+				Overrides: []Override{
+					{
+						Group: "group",
+						MatrixProviderConfig: MatrixProviderConfig{
+							ServerURL:      "https://example01.com",
+							AccessToken:    "12",
+							InternalRoomID: "!a:example01.com",
+						},
+					},
+				},
+			},
+			InputGroup: "",
+			ExpectedOutput: MatrixProviderConfig{
+				ServerURL:      "https://example.com",
+				AccessToken:    "1",
+				InternalRoomID: "!a:example.com",
+			},
+		},
+		{
+			Name: "provider-with-override-specify-group-should-override",
+			Provider: AlertProvider{
+				MatrixProviderConfig: MatrixProviderConfig{
+					ServerURL:      "https://example.com",
+					AccessToken:    "1",
+					InternalRoomID: "!a:example.com",
+				},
+				Overrides: []Override{
+					{
+						Group: "group",
+						MatrixProviderConfig: MatrixProviderConfig{
+							ServerURL:      "https://example01.com",
+							AccessToken:    "12",
+							InternalRoomID: "!a:example01.com",
+						},
+					},
+				},
+			},
+			InputGroup: "group",
+			ExpectedOutput: MatrixProviderConfig{
+				ServerURL:      "https://example01.com",
+				AccessToken:    "12",
+				InternalRoomID: "!a:example01.com",
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.Name, func(t *testing.T) {
+			if got := tt.Provider.getConfigForGroup(tt.InputGroup); got != tt.ExpectedOutput {
+				t.Errorf("AlertProvider.getConfigForGroup() = %v, want %v", got, tt.ExpectedOutput)
+			}
+		})
+	}
+}

alerting/provider/mattermost/mattermost.go

@@ -2,13 +2,14 @@ package mattermost
 
 import (
 	"bytes"
+	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
 )
 
 // AlertProvider is the configuration necessary for sending an alert using Mattermost
@@ -60,6 +61,7 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 	if err != nil {
 		return err
 	}
+	defer response.Body.Close()
 	if response.StatusCode > 399 {
 		body, _ := io.ReadAll(response.Body)
 		return fmt.Errorf("call to provider alert returned status code %d: %s", response.StatusCode, string(body))
@@ -67,9 +69,31 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 	return err
 }
 
+type Body struct {
+	Text        string       `json:"text"`
+	Username    string       `json:"username"`
+	IconURL     string       `json:"icon_url"`
+	Attachments []Attachment `json:"attachments"`
+}
+
+type Attachment struct {
+	Title    string  `json:"title"`
+	Fallback string  `json:"fallback"`
+	Text     string  `json:"text"`
+	Short    bool    `json:"short"`
+	Color    string  `json:"color"`
+	Fields   []Field `json:"fields"`
+}
+
+type Field struct {
+	Title string `json:"title"`
+	Value string `json:"value"`
+	Short bool   `json:"short"`
+}
+
 // buildRequestBody builds the request body for the provider
-func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) string {
-	var message, color string
+func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) []byte {
+	var message, color, results string
 	if resolved {
 		message = fmt.Sprintf("An alert for *%s* has been resolved after passing successfully %d time(s) in a row", endpoint.DisplayName(), alert.SuccessThreshold)
 		color = "#36A64F"
@@ -77,7 +101,6 @@ func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *
 		message = fmt.Sprintf("An alert for *%s* has been triggered due to having failed %d time(s) in a row", endpoint.DisplayName(), alert.FailureThreshold)
 		color = "#DD0000"
 	}
-	var results string
 	for _, conditionResult := range result.ConditionResults {
 		var prefix string
 		if conditionResult.Success {
@@ -85,38 +108,34 @@ func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *
 		} else {
 			prefix = ":x:"
 		}
-		results += fmt.Sprintf("%s - `%s`\\n", prefix, conditionResult.Condition)
+		results += fmt.Sprintf("%s - `%s`\n", prefix, conditionResult.Condition)
 	}
 	var description string
 	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
-		description = ":\\n> " + alertDescription
+		description = ":\n> " + alertDescription
 	}
-	return fmt.Sprintf(`{
-  "text": "",
-  "username": "gatus",
-  "icon_url": "https://raw.githubusercontent.com/TwiN/gatus/master/.github/assets/logo.png",
-  "attachments": [
-    {
-      "title": ":rescue_worker_helmet: Gatus",
-      "fallback": "Gatus - %s",
-      "text": "%s%s",
-      "short": false,
-      "color": "%s",
-      "fields": [
-        {
-          "title": "URL",
-          "value": "%s",
-          "short": false
-        },
-        {
-          "title": "Condition results",
-          "value": "%s",
-          "short": false
-        }
-      ]
-    }
-  ]
-}`, message, message, description, color, endpoint.URL, results)
+	body, _ := json.Marshal(Body{
+		Text:     "",
+		Username: "gatus",
+		IconURL:  "https://raw.githubusercontent.com/TwiN/gatus/master/.github/assets/logo.png",
+		Attachments: []Attachment{
+			{
+				Title:    ":helmet_with_white_cross: Gatus",
+				Fallback: "Gatus - " + message,
+				Text:     message + description,
+				Short:    false,
+				Color:    color,
+				Fields: []Field{
+					{
+						Title: "Condition results",
+						Value: results,
+						Short: false,
+					},
+				},
+			},
+		},
+	})
+	return body
 }
 
 // getWebhookURLForGroup returns the appropriate Webhook URL integration to for a given group

alerting/provider/mattermost/mattermost_test.go

@@ -5,10 +5,10 @@ import (
 	"net/http"
 	"testing"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v4/test"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
+	"github.com/TwiN/gatus/v5/test"
 )
 
 func TestAlertProvider_IsValid(t *testing.T) {
@@ -155,14 +155,14 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 			Provider:     AlertProvider{},
 			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     false,
-			ExpectedBody: "{\n  \"text\": \"\",\n  \"username\": \"gatus\",\n  \"icon_url\": \"https://raw.githubusercontent.com/TwiN/gatus/master/.github/assets/logo.png\",\n  \"attachments\": [\n    {\n      \"title\": \":rescue_worker_helmet: Gatus\",\n      \"fallback\": \"Gatus - An alert for *endpoint-name* has been triggered due to having failed 3 time(s) in a row\",\n      \"text\": \"An alert for *endpoint-name* has been triggered due to having failed 3 time(s) in a row:\\n> description-1\",\n      \"short\": false,\n      \"color\": \"#DD0000\",\n      \"fields\": [\n        {\n          \"title\": \"URL\",\n          \"value\": \"\",\n          \"short\": false\n        },\n        {\n          \"title\": \"Condition results\",\n          \"value\": \":x: - `[CONNECTED] == true`\\n:x: - `[STATUS] == 200`\\n\",\n          \"short\": false\n        }\n      ]\n    }\n  ]\n}",
+			ExpectedBody: "{\"text\":\"\",\"username\":\"gatus\",\"icon_url\":\"https://raw.githubusercontent.com/TwiN/gatus/master/.github/assets/logo.png\",\"attachments\":[{\"title\":\":helmet_with_white_cross: Gatus\",\"fallback\":\"Gatus - An alert for *endpoint-name* has been triggered due to having failed 3 time(s) in a row\",\"text\":\"An alert for *endpoint-name* has been triggered due to having failed 3 time(s) in a row:\\n\\u003e description-1\",\"short\":false,\"color\":\"#DD0000\",\"fields\":[{\"title\":\"Condition results\",\"value\":\":x: - `[CONNECTED] == true`\\n:x: - `[STATUS] == 200`\\n\",\"short\":false}]}]}",
 		},
 		{
 			Name:         "resolved",
 			Provider:     AlertProvider{},
 			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     true,
-			ExpectedBody: "{\n  \"text\": \"\",\n  \"username\": \"gatus\",\n  \"icon_url\": \"https://raw.githubusercontent.com/TwiN/gatus/master/.github/assets/logo.png\",\n  \"attachments\": [\n    {\n      \"title\": \":rescue_worker_helmet: Gatus\",\n      \"fallback\": \"Gatus - An alert for *endpoint-name* has been resolved after passing successfully 5 time(s) in a row\",\n      \"text\": \"An alert for *endpoint-name* has been resolved after passing successfully 5 time(s) in a row:\\n> description-2\",\n      \"short\": false,\n      \"color\": \"#36A64F\",\n      \"fields\": [\n        {\n          \"title\": \"URL\",\n          \"value\": \"\",\n          \"short\": false\n        },\n        {\n          \"title\": \"Condition results\",\n          \"value\": \":white_check_mark: - `[CONNECTED] == true`\\n:white_check_mark: - `[STATUS] == 200`\\n\",\n          \"short\": false\n        }\n      ]\n    }\n  ]\n}",
+			ExpectedBody: "{\"text\":\"\",\"username\":\"gatus\",\"icon_url\":\"https://raw.githubusercontent.com/TwiN/gatus/master/.github/assets/logo.png\",\"attachments\":[{\"title\":\":helmet_with_white_cross: Gatus\",\"fallback\":\"Gatus - An alert for *endpoint-name* has been resolved after passing successfully 5 time(s) in a row\",\"text\":\"An alert for *endpoint-name* has been resolved after passing successfully 5 time(s) in a row:\\n\\u003e description-2\",\"short\":false,\"color\":\"#36A64F\",\"fields\":[{\"title\":\"Condition results\",\"value\":\":white_check_mark: - `[CONNECTED] == true`\\n:white_check_mark: - `[STATUS] == 200`\\n\",\"short\":false}]}]}",
 		},
 	}
 	for _, scenario := range scenarios {
@@ -178,11 +178,11 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 				},
 				scenario.Resolved,
 			)
-			if body != scenario.ExpectedBody {
-				t.Errorf("expected %s, got %s", scenario.ExpectedBody, body)
+			if string(body) != scenario.ExpectedBody {
+				t.Errorf("expected:\n%s\ngot:\n%s", scenario.ExpectedBody, body)
 			}
 			out := make(map[string]interface{})
-			if err := json.Unmarshal([]byte(body), &out); err != nil {
+			if err := json.Unmarshal(body, &out); err != nil {
 				t.Error("expected body to be valid JSON, got error:", err.Error())
 			}
 		})

alerting/provider/messagebird/messagebird.go

@@ -2,13 +2,14 @@ package messagebird
 
 import (
 	"bytes"
+	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
 )
 
 const (
@@ -33,7 +34,7 @@ func (provider *AlertProvider) IsValid() bool {
 // Send an alert using the provider
 // Reference doc for messagebird: https://developers.messagebird.com/api/sms-messaging/#send-outbound-sms
 func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
-	buffer := bytes.NewBuffer([]byte(provider.buildRequestBody(endpoint, alert, result, resolved)))
+	buffer := bytes.NewBuffer(provider.buildRequestBody(endpoint, alert, result, resolved))
 	request, err := http.NewRequest(http.MethodPost, restAPIURL, buffer)
 	if err != nil {
 		return err
@@ -44,6 +45,7 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 	if err != nil {
 		return err
 	}
+	defer response.Body.Close()
 	if response.StatusCode > 399 {
 		body, _ := io.ReadAll(response.Body)
 		return fmt.Errorf("call to provider alert returned status code %d: %s", response.StatusCode, string(body))
@@ -51,19 +53,26 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 	return err
 }
 
+type Body struct {
+	Originator string `json:"originator"`
+	Recipients string `json:"recipients"`
+	Body       string `json:"body"`
+}
+
 // buildRequestBody builds the request body for the provider
-func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) string {
+func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) []byte {
 	var message string
 	if resolved {
 		message = fmt.Sprintf("RESOLVED: %s - %s", endpoint.DisplayName(), alert.GetDescription())
 	} else {
 		message = fmt.Sprintf("TRIGGERED: %s - %s", endpoint.DisplayName(), alert.GetDescription())
 	}
-	return fmt.Sprintf(`{
-  "originator": "%s",
-  "recipients": "%s",
-  "body": "%s"
-}`, provider.Originator, provider.Recipients, message)
+	body, _ := json.Marshal(Body{
+		Originator: provider.Originator,
+		Recipients: provider.Recipients,
+		Body:       message,
+	})
+	return body
 }
 
 // GetDefaultAlert returns the provider's default alert configuration

alerting/provider/messagebird/messagebird_test.go

@@ -5,10 +5,10 @@ import (
 	"net/http"
 	"testing"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v4/test"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
+	"github.com/TwiN/gatus/v5/test"
 )
 
 func TestMessagebirdAlertProvider_IsValid(t *testing.T) {
@@ -118,14 +118,14 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 			Provider:     AlertProvider{AccessKey: "1", Originator: "2", Recipients: "3"},
 			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     false,
-			ExpectedBody: "{\n  \"originator\": \"2\",\n  \"recipients\": \"3\",\n  \"body\": \"TRIGGERED: endpoint-name - description-1\"\n}",
+			ExpectedBody: "{\"originator\":\"2\",\"recipients\":\"3\",\"body\":\"TRIGGERED: endpoint-name - description-1\"}",
 		},
 		{
 			Name:         "resolved",
 			Provider:     AlertProvider{AccessKey: "4", Originator: "5", Recipients: "6"},
 			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     true,
-			ExpectedBody: "{\n  \"originator\": \"5\",\n  \"recipients\": \"6\",\n  \"body\": \"RESOLVED: endpoint-name - description-2\"\n}",
+			ExpectedBody: "{\"originator\":\"5\",\"recipients\":\"6\",\"body\":\"RESOLVED: endpoint-name - description-2\"}",
 		},
 	}
 	for _, scenario := range scenarios {
@@ -141,8 +141,8 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 				},
 				scenario.Resolved,
 			)
-			if body != scenario.ExpectedBody {
-				t.Errorf("expected %s, got %s", scenario.ExpectedBody, body)
+			if string(body) != scenario.ExpectedBody {
+				t.Errorf("expected:\n%s\ngot:\n%s", scenario.ExpectedBody, body)
 			}
 			out := make(map[string]interface{})
 			if err := json.Unmarshal([]byte(body), &out); err != nil {

alerting/provider/ntfy/ntfy.go

@@ -0,0 +1,96 @@
+package ntfy
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"strconv"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
+)
+
+const (
+	DefaultURL      = "https://ntfy.sh"
+	DefaultPriority = 3
+)
+
+// AlertProvider is the configuration necessary for sending an alert using Slack
+type AlertProvider struct {
+	Topic    string `yaml:"topic"`
+	URL      string `yaml:"url,omitempty"`      // Defaults to DefaultURL
+	Priority int    `yaml:"priority,omitempty"` // Defaults to DefaultPriority
+
+	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
+	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+}
+
+// IsValid returns whether the provider's configuration is valid
+func (provider *AlertProvider) IsValid() bool {
+	if len(provider.URL) == 0 {
+		provider.URL = DefaultURL
+	}
+	if provider.Priority == 0 {
+		provider.Priority = DefaultPriority
+	}
+	return len(provider.URL) > 0 && len(provider.Topic) > 0 && provider.Priority > 0 && provider.Priority < 6
+}
+
+// Send an alert using the provider
+func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
+	buffer := bytes.NewBuffer(provider.buildRequestBody(endpoint, alert, result, resolved))
+	request, err := http.NewRequest(http.MethodPost, provider.URL, buffer)
+	if err != nil {
+		return err
+	}
+	request.Header.Set("Content-Type", "application/json")
+	response, err := client.GetHTTPClient(nil).Do(request)
+	if err != nil {
+		return err
+	}
+	defer response.Body.Close()
+	if response.StatusCode > 399 {
+		body, _ := io.ReadAll(response.Body)
+		return fmt.Errorf("call to provider alert returned status code %d: %s", response.StatusCode, string(body))
+	}
+	return err
+}
+
+type Body struct {
+	Topic    string   `json:"topic"`
+	Title    string   `json:"title"`
+	Message  string   `json:"message"`
+	Tags     []string `json:"tags"`
+	Priority int      `json:"priority"`
+}
+
+// buildRequestBody builds the request body for the provider
+func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) []byte {
+	var message, tag string
+	if resolved {
+		tag = "white_check_mark"
+		message = "An alert has been resolved after passing successfully " + strconv.Itoa(alert.SuccessThreshold) + " time(s) in a row"
+	} else {
+		tag = "x"
+		message = "An alert has been triggered due to having failed " + strconv.Itoa(alert.FailureThreshold) + " time(s) in a row"
+	}
+	if len(alert.GetDescription()) > 0 {
+		message += " with the following description: " + alert.GetDescription()
+	}
+	body, _ := json.Marshal(Body{
+		Topic:    provider.Topic,
+		Title:    "Gatus: " + endpoint.DisplayName(),
+		Message:  message,
+		Tags:     []string{tag},
+		Priority: provider.Priority,
+	})
+	return body
+}
+
+// GetDefaultAlert returns the provider's default alert configuration
+func (provider AlertProvider) GetDefaultAlert() *alert.Alert {
+	return provider.DefaultAlert
+}

alerting/provider/ntfy/ntfy_test.go

@@ -0,0 +1,104 @@
+package ntfy
+
+import (
+	"encoding/json"
+	"testing"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/core"
+)
+
+func TestAlertDefaultProvider_IsValid(t *testing.T) {
+	scenarios := []struct {
+		name     string
+		provider AlertProvider
+		expected bool
+	}{
+		{
+			name:     "valid",
+			provider: AlertProvider{URL: "https://ntfy.sh", Topic: "example", Priority: 1},
+			expected: true,
+		},
+		{
+			name:     "no-url-should-use-default-value",
+			provider: AlertProvider{Topic: "example", Priority: 1},
+			expected: true,
+		},
+		{
+			name:     "invalid-topic",
+			provider: AlertProvider{URL: "https://ntfy.sh", Topic: "", Priority: 1},
+			expected: false,
+		},
+		{
+			name:     "invalid-priority-too-high",
+			provider: AlertProvider{URL: "https://ntfy.sh", Topic: "example", Priority: 6},
+			expected: false,
+		},
+		{
+			name:     "invalid-priority-too-low",
+			provider: AlertProvider{URL: "https://ntfy.sh", Topic: "example", Priority: -1},
+			expected: false,
+		},
+		{
+			name:     "no-priority-should-use-default-value",
+			provider: AlertProvider{URL: "https://ntfy.sh", Topic: "example"},
+			expected: true,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			if scenario.provider.IsValid() != scenario.expected {
+				t.Errorf("expected %t, got %t", scenario.expected, scenario.provider.IsValid())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_buildRequestBody(t *testing.T) {
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		Name         string
+		Provider     AlertProvider
+		Alert        alert.Alert
+		Resolved     bool
+		ExpectedBody string
+	}{
+		{
+			Name:         "triggered",
+			Provider:     AlertProvider{URL: "https://ntfy.sh", Topic: "example", Priority: 1},
+			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:     false,
+			ExpectedBody: `{"topic":"example","title":"Gatus: endpoint-name","message":"An alert has been triggered due to having failed 3 time(s) in a row with the following description: description-1","tags":["x"],"priority":1}`,
+		},
+		{
+			Name:         "resolved",
+			Provider:     AlertProvider{URL: "https://ntfy.sh", Topic: "example", Priority: 2},
+			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:     true,
+			ExpectedBody: `{"topic":"example","title":"Gatus: endpoint-name","message":"An alert has been resolved after passing successfully 5 time(s) in a row with the following description: description-2","tags":["white_check_mark"],"priority":2}`,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			body := scenario.Provider.buildRequestBody(
+				&core.Endpoint{Name: "endpoint-name"},
+				&scenario.Alert,
+				&core.Result{
+					ConditionResults: []*core.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.Resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.Resolved},
+					},
+				},
+				scenario.Resolved,
+			)
+			if string(body) != scenario.ExpectedBody {
+				t.Errorf("expected:\n%s\ngot:\n%s", scenario.ExpectedBody, body)
+			}
+			out := make(map[string]interface{})
+			if err := json.Unmarshal(body, &out); err != nil {
+				t.Error("expected body to be valid JSON, got error:", err.Error())
+			}
+		})
+	}
+}

alerting/provider/opsgenie/opsgenie.go

@@ -9,9 +9,9 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
 )
 
 const (
@@ -83,37 +83,36 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 
 func (provider *AlertProvider) createAlert(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
 	payload := provider.buildCreateRequestBody(endpoint, alert, result, resolved)
-	_, err := provider.sendRequest(restAPI, http.MethodPost, payload)
-	return err
+	return provider.sendRequest(restAPI, http.MethodPost, payload)
 }
 
 func (provider *AlertProvider) closeAlert(endpoint *core.Endpoint, alert *alert.Alert) error {
 	payload := provider.buildCloseRequestBody(endpoint, alert)
 	url := restAPI + "/" + provider.alias(buildKey(endpoint)) + "/close?identifierType=alias"
-	_, err := provider.sendRequest(url, http.MethodPost, payload)
-	return err
+	return provider.sendRequest(url, http.MethodPost, payload)
 }
 
-func (provider *AlertProvider) sendRequest(url, method string, payload interface{}) (*http.Response, error) {
+func (provider *AlertProvider) sendRequest(url, method string, payload interface{}) error {
 	body, err := json.Marshal(payload)
 	if err != nil {
-		return nil, fmt.Errorf("fail to build alert payload: %v", payload)
+		return fmt.Errorf("error build alert with payload %v: %w", payload, err)
 	}
 	request, err := http.NewRequest(method, url, bytes.NewBuffer(body))
 	if err != nil {
-		return nil, err
+		return err
 	}
 	request.Header.Set("Content-Type", "application/json")
 	request.Header.Set("Authorization", "GenieKey "+provider.APIKey)
-	res, err := client.GetHTTPClient(nil).Do(request)
+	response, err := client.GetHTTPClient(nil).Do(request)
 	if err != nil {
-		return nil, err
+		return err
 	}
-	if res.StatusCode > 399 {
-		rBody, _ := io.ReadAll(res.Body)
-		return nil, fmt.Errorf("call to provider alert returned status code %d: %s", res.StatusCode, string(rBody))
+	defer response.Body.Close()
+	if response.StatusCode > 399 {
+		rBody, _ := io.ReadAll(response.Body)
+		return fmt.Errorf("call to provider alert returned status code %d: %s", response.StatusCode, string(rBody))
 	}
-	return res, nil
+	return nil
 }
 
 func (provider *AlertProvider) buildCreateRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) alertCreateRequest {

alerting/provider/opsgenie/opsgenie_test.go

@@ -5,10 +5,10 @@ import (
 	"reflect"
 	"testing"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v4/test"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
+	"github.com/TwiN/gatus/v5/test"
 )
 
 func TestAlertProvider_IsValid(t *testing.T) {

alerting/provider/pagerduty/pagerduty.go

@@ -8,9 +8,9 @@ import (
 	"log"
 	"net/http"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
 )
 
 const (
@@ -53,7 +53,7 @@ func (provider *AlertProvider) IsValid() bool {
 //
 // Relevant: https://developer.pagerduty.com/docs/events-api-v2/trigger-events/
 func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
-	buffer := bytes.NewBuffer([]byte(provider.buildRequestBody(endpoint, alert, result, resolved)))
+	buffer := bytes.NewBuffer(provider.buildRequestBody(endpoint, alert, result, resolved))
 	request, err := http.NewRequest(http.MethodPost, restAPIURL, buffer)
 	if err != nil {
 		return err
@@ -63,6 +63,7 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 	if err != nil {
 		return err
 	}
+	defer response.Body.Close()
 	if response.StatusCode > 399 {
 		body, _ := io.ReadAll(response.Body)
 		return fmt.Errorf("call to provider alert returned status code %d: %s", response.StatusCode, string(body))
@@ -86,8 +87,21 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 	return nil
 }
 
+type Body struct {
+	RoutingKey  string  `json:"routing_key"`
+	DedupKey    string  `json:"dedup_key"`
+	EventAction string  `json:"event_action"`
+	Payload     Payload `json:"payload"`
+}
+
+type Payload struct {
+	Summary  string `json:"summary"`
+	Source   string `json:"source"`
+	Severity string `json:"severity"`
+}
+
 // buildRequestBody builds the request body for the provider
-func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) string {
+func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) []byte {
 	var message, eventAction, resolveKey string
 	if resolved {
 		message = fmt.Sprintf("RESOLVED: %s - %s", endpoint.DisplayName(), alert.GetDescription())
@@ -98,16 +112,17 @@ func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *
 		eventAction = "trigger"
 		resolveKey = ""
 	}
-	return fmt.Sprintf(`{
-  "routing_key": "%s",
-  "dedup_key": "%s",
-  "event_action": "%s",
-  "payload": {
-    "summary": "%s",
-    "source": "%s",
-    "severity": "critical"
-  }
-}`, provider.getIntegrationKeyForGroup(endpoint.Group), resolveKey, eventAction, message, endpoint.Name)
+	body, _ := json.Marshal(Body{
+		RoutingKey:  provider.getIntegrationKeyForGroup(endpoint.Group),
+		DedupKey:    resolveKey,
+		EventAction: eventAction,
+		Payload: Payload{
+			Summary:  message,
+			Source:   "Gatus",
+			Severity: "critical",
+		},
+	})
+	return body
 }
 
 // getIntegrationKeyForGroup returns the appropriate pagerduty integration key for a given group

alerting/provider/pagerduty/pagerduty_test.go

@@ -5,10 +5,10 @@ import (
 	"net/http"
 	"testing"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v4/test"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
+	"github.com/TwiN/gatus/v5/test"
 )
 
 func TestAlertProvider_IsValid(t *testing.T) {
@@ -149,24 +149,24 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 			Provider:     AlertProvider{IntegrationKey: "00000000000000000000000000000000"},
 			Alert:        alert.Alert{Description: &description},
 			Resolved:     false,
-			ExpectedBody: "{\n  \"routing_key\": \"00000000000000000000000000000000\",\n  \"dedup_key\": \"\",\n  \"event_action\": \"trigger\",\n  \"payload\": {\n    \"summary\": \"TRIGGERED:  - test\",\n    \"source\": \"\",\n    \"severity\": \"critical\"\n  }\n}",
+			ExpectedBody: "{\"routing_key\":\"00000000000000000000000000000000\",\"dedup_key\":\"\",\"event_action\":\"trigger\",\"payload\":{\"summary\":\"TRIGGERED: endpoint-name - test\",\"source\":\"Gatus\",\"severity\":\"critical\"}}",
 		},
 		{
 			Name:         "resolved",
 			Provider:     AlertProvider{IntegrationKey: "00000000000000000000000000000000"},
 			Alert:        alert.Alert{Description: &description, ResolveKey: "key"},
 			Resolved:     true,
-			ExpectedBody: "{\n  \"routing_key\": \"00000000000000000000000000000000\",\n  \"dedup_key\": \"key\",\n  \"event_action\": \"resolve\",\n  \"payload\": {\n    \"summary\": \"RESOLVED:  - test\",\n    \"source\": \"\",\n    \"severity\": \"critical\"\n  }\n}",
+			ExpectedBody: "{\"routing_key\":\"00000000000000000000000000000000\",\"dedup_key\":\"key\",\"event_action\":\"resolve\",\"payload\":{\"summary\":\"RESOLVED: endpoint-name - test\",\"source\":\"Gatus\",\"severity\":\"critical\"}}",
 		},
 	}
 	for _, scenario := range scenarios {
 		t.Run(scenario.Name, func(t *testing.T) {
-			body := scenario.Provider.buildRequestBody(&core.Endpoint{}, &scenario.Alert, &core.Result{}, scenario.Resolved)
-			if body != scenario.ExpectedBody {
-				t.Errorf("expected %s, got %s", scenario.ExpectedBody, body)
+			body := scenario.Provider.buildRequestBody(&core.Endpoint{Name: "endpoint-name"}, &scenario.Alert, &core.Result{}, scenario.Resolved)
+			if string(body) != scenario.ExpectedBody {
+				t.Errorf("expected:\n%s\ngot:\n%s", scenario.ExpectedBody, body)
 			}
 			out := make(map[string]interface{})
-			if err := json.Unmarshal([]byte(body), &out); err != nil {
+			if err := json.Unmarshal(body, &out); err != nil {
 				t.Error("expected body to be valid JSON, got error:", err.Error())
 			}
 		})

alerting/provider/provider.go

@@ -1,20 +1,22 @@
 package provider
 
 import (
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/alerting/provider/custom"
-	"github.com/TwiN/gatus/v4/alerting/provider/discord"
-	"github.com/TwiN/gatus/v4/alerting/provider/email"
-	"github.com/TwiN/gatus/v4/alerting/provider/googlechat"
-	"github.com/TwiN/gatus/v4/alerting/provider/mattermost"
-	"github.com/TwiN/gatus/v4/alerting/provider/messagebird"
-	"github.com/TwiN/gatus/v4/alerting/provider/opsgenie"
-	"github.com/TwiN/gatus/v4/alerting/provider/pagerduty"
-	"github.com/TwiN/gatus/v4/alerting/provider/slack"
-	"github.com/TwiN/gatus/v4/alerting/provider/teams"
-	"github.com/TwiN/gatus/v4/alerting/provider/telegram"
-	"github.com/TwiN/gatus/v4/alerting/provider/twilio"
-	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/alerting/provider/custom"
+	"github.com/TwiN/gatus/v5/alerting/provider/discord"
+	"github.com/TwiN/gatus/v5/alerting/provider/email"
+	"github.com/TwiN/gatus/v5/alerting/provider/googlechat"
+	"github.com/TwiN/gatus/v5/alerting/provider/matrix"
+	"github.com/TwiN/gatus/v5/alerting/provider/mattermost"
+	"github.com/TwiN/gatus/v5/alerting/provider/messagebird"
+	"github.com/TwiN/gatus/v5/alerting/provider/ntfy"
+	"github.com/TwiN/gatus/v5/alerting/provider/opsgenie"
+	"github.com/TwiN/gatus/v5/alerting/provider/pagerduty"
+	"github.com/TwiN/gatus/v5/alerting/provider/slack"
+	"github.com/TwiN/gatus/v5/alerting/provider/teams"
+	"github.com/TwiN/gatus/v5/alerting/provider/telegram"
+	"github.com/TwiN/gatus/v5/alerting/provider/twilio"
+	"github.com/TwiN/gatus/v5/core"
 )
 
 // AlertProvider is the interface that each providers should implement
@@ -57,8 +59,10 @@ var (
 	_ AlertProvider = (*discord.AlertProvider)(nil)
 	_ AlertProvider = (*email.AlertProvider)(nil)
 	_ AlertProvider = (*googlechat.AlertProvider)(nil)
+	_ AlertProvider = (*matrix.AlertProvider)(nil)
 	_ AlertProvider = (*mattermost.AlertProvider)(nil)
 	_ AlertProvider = (*messagebird.AlertProvider)(nil)
+	_ AlertProvider = (*ntfy.AlertProvider)(nil)
 	_ AlertProvider = (*opsgenie.AlertProvider)(nil)
 	_ AlertProvider = (*pagerduty.AlertProvider)(nil)
 	_ AlertProvider = (*slack.AlertProvider)(nil)

alerting/provider/provider_test.go

@@ -3,7 +3,7 @@ package provider
 import (
 	"testing"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
+	"github.com/TwiN/gatus/v5/alerting/alert"
 )
 
 func TestParseWithDefaultAlert(t *testing.T) {

alerting/provider/slack/slack.go

@@ -2,13 +2,14 @@ package slack
 
 import (
 	"bytes"
+	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
 )
 
 // AlertProvider is the configuration necessary for sending an alert using Slack
@@ -42,7 +43,7 @@ func (provider *AlertProvider) IsValid() bool {
 
 // Send an alert using the provider
 func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
-	buffer := bytes.NewBuffer([]byte(provider.buildRequestBody(endpoint, alert, result, resolved)))
+	buffer := bytes.NewBuffer(provider.buildRequestBody(endpoint, alert, result, resolved))
 	request, err := http.NewRequest(http.MethodPost, provider.getWebhookURLForGroup(endpoint.Group), buffer)
 	if err != nil {
 		return err
@@ -52,6 +53,7 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 	if err != nil {
 		return err
 	}
+	defer response.Body.Close()
 	if response.StatusCode > 399 {
 		body, _ := io.ReadAll(response.Body)
 		return fmt.Errorf("call to provider alert returned status code %d: %s", response.StatusCode, string(body))
@@ -59,8 +61,27 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 	return err
 }
 
+type Body struct {
+	Text        string       `json:"text"`
+	Attachments []Attachment `json:"attachments"`
+}
+
+type Attachment struct {
+	Title  string  `json:"title"`
+	Text   string  `json:"text"`
+	Short  bool    `json:"short"`
+	Color  string  `json:"color"`
+	Fields []Field `json:"fields"`
+}
+
+type Field struct {
+	Title string `json:"title"`
+	Value string `json:"value"`
+	Short bool   `json:"short"`
+}
+
 // buildRequestBody builds the request body for the provider
-func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) string {
+func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) []byte {
 	var message, color, results string
 	if resolved {
 		message = fmt.Sprintf("An alert for *%s* has been resolved after passing successfully %d time(s) in a row", endpoint.DisplayName(), alert.SuccessThreshold)
@@ -76,30 +97,31 @@ func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *
 		} else {
 			prefix = ":x:"
 		}
-		results += fmt.Sprintf("%s - `%s`\\n", prefix, conditionResult.Condition)
+		results += fmt.Sprintf("%s - `%s`\n", prefix, conditionResult.Condition)
 	}
 	var description string
 	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
-		description = ":\\n> " + alertDescription
+		description = ":\n> " + alertDescription
 	}
-	return fmt.Sprintf(`{
-  "text": "",
-  "attachments": [
-    {
-      "title": ":helmet_with_white_cross: Gatus",
-      "text": "%s%s",
-      "short": false,
-      "color": "%s",
-      "fields": [
-        {
-          "title": "Condition results",
-          "value": "%s",
-          "short": false
-        }
-      ]
-    }
-  ]
-}`, message, description, color, results)
+	body, _ := json.Marshal(Body{
+		Text: "",
+		Attachments: []Attachment{
+			{
+				Title: ":helmet_with_white_cross: Gatus",
+				Text:  message + description,
+				Short: false,
+				Color: color,
+				Fields: []Field{
+					{
+						Title: "Condition results",
+						Value: results,
+						Short: false,
+					},
+				},
+			},
+		},
+	})
+	return body
 }
 
 // getWebhookURLForGroup returns the appropriate Webhook URL integration to for a given group

alerting/provider/slack/slack_test.go

@@ -5,10 +5,10 @@ import (
 	"net/http"
 	"testing"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v4/test"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
+	"github.com/TwiN/gatus/v5/test"
 )
 
 func TestAlertDefaultProvider_IsValid(t *testing.T) {
@@ -20,8 +20,8 @@ func TestAlertDefaultProvider_IsValid(t *testing.T) {
 	if !validProvider.IsValid() {
 		t.Error("provider should've been valid")
 	}
-
 }
+
 func TestAlertProvider_IsValidWithOverride(t *testing.T) {
 	providerWithInvalidOverrideGroup := AlertProvider{
 		Overrides: []Override{
@@ -58,6 +58,7 @@ func TestAlertProvider_IsValidWithOverride(t *testing.T) {
 		t.Error("provider should've been valid")
 	}
 }
+
 func TestAlertProvider_Send(t *testing.T) {
 	defer client.InjectHTTPClient(nil)
 	firstDescription := "description-1"
@@ -152,7 +153,7 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 			Endpoint:     core.Endpoint{Name: "name"},
 			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     false,
-			ExpectedBody: "{\n  \"text\": \"\",\n  \"attachments\": [\n    {\n      \"title\": \":helmet_with_white_cross: Gatus\",\n      \"text\": \"An alert for *name* has been triggered due to having failed 3 time(s) in a row:\\n> description-1\",\n      \"short\": false,\n      \"color\": \"#DD0000\",\n      \"fields\": [\n        {\n          \"title\": \"Condition results\",\n          \"value\": \":x: - `[CONNECTED] == true`\\n:x: - `[STATUS] == 200`\\n\",\n          \"short\": false\n        }\n      ]\n    }\n  ]\n}",
+			ExpectedBody: "{\"text\":\"\",\"attachments\":[{\"title\":\":helmet_with_white_cross: Gatus\",\"text\":\"An alert for *name* has been triggered due to having failed 3 time(s) in a row:\\n\\u003e description-1\",\"short\":false,\"color\":\"#DD0000\",\"fields\":[{\"title\":\"Condition results\",\"value\":\":x: - `[CONNECTED] == true`\\n:x: - `[STATUS] == 200`\\n\",\"short\":false}]}]}",
 		},
 		{
 			Name:         "triggered-with-group",
@@ -160,7 +161,7 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 			Endpoint:     core.Endpoint{Name: "name", Group: "group"},
 			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     false,
-			ExpectedBody: "{\n  \"text\": \"\",\n  \"attachments\": [\n    {\n      \"title\": \":helmet_with_white_cross: Gatus\",\n      \"text\": \"An alert for *group/name* has been triggered due to having failed 3 time(s) in a row:\\n> description-1\",\n      \"short\": false,\n      \"color\": \"#DD0000\",\n      \"fields\": [\n        {\n          \"title\": \"Condition results\",\n          \"value\": \":x: - `[CONNECTED] == true`\\n:x: - `[STATUS] == 200`\\n\",\n          \"short\": false\n        }\n      ]\n    }\n  ]\n}",
+			ExpectedBody: "{\"text\":\"\",\"attachments\":[{\"title\":\":helmet_with_white_cross: Gatus\",\"text\":\"An alert for *group/name* has been triggered due to having failed 3 time(s) in a row:\\n\\u003e description-1\",\"short\":false,\"color\":\"#DD0000\",\"fields\":[{\"title\":\"Condition results\",\"value\":\":x: - `[CONNECTED] == true`\\n:x: - `[STATUS] == 200`\\n\",\"short\":false}]}]}",
 		},
 		{
 			Name:         "resolved",
@@ -168,7 +169,7 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 			Endpoint:     core.Endpoint{Name: "name"},
 			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     true,
-			ExpectedBody: "{\n  \"text\": \"\",\n  \"attachments\": [\n    {\n      \"title\": \":helmet_with_white_cross: Gatus\",\n      \"text\": \"An alert for *name* has been resolved after passing successfully 5 time(s) in a row:\\n> description-2\",\n      \"short\": false,\n      \"color\": \"#36A64F\",\n      \"fields\": [\n        {\n          \"title\": \"Condition results\",\n          \"value\": \":white_check_mark: - `[CONNECTED] == true`\\n:white_check_mark: - `[STATUS] == 200`\\n\",\n          \"short\": false\n        }\n      ]\n    }\n  ]\n}",
+			ExpectedBody: "{\"text\":\"\",\"attachments\":[{\"title\":\":helmet_with_white_cross: Gatus\",\"text\":\"An alert for *name* has been resolved after passing successfully 5 time(s) in a row:\\n\\u003e description-2\",\"short\":false,\"color\":\"#36A64F\",\"fields\":[{\"title\":\"Condition results\",\"value\":\":white_check_mark: - `[CONNECTED] == true`\\n:white_check_mark: - `[STATUS] == 200`\\n\",\"short\":false}]}]}",
 		},
 		{
 			Name:         "resolved-with-group",
@@ -176,7 +177,7 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 			Endpoint:     core.Endpoint{Name: "name", Group: "group"},
 			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     true,
-			ExpectedBody: "{\n  \"text\": \"\",\n  \"attachments\": [\n    {\n      \"title\": \":helmet_with_white_cross: Gatus\",\n      \"text\": \"An alert for *group/name* has been resolved after passing successfully 5 time(s) in a row:\\n> description-2\",\n      \"short\": false,\n      \"color\": \"#36A64F\",\n      \"fields\": [\n        {\n          \"title\": \"Condition results\",\n          \"value\": \":white_check_mark: - `[CONNECTED] == true`\\n:white_check_mark: - `[STATUS] == 200`\\n\",\n          \"short\": false\n        }\n      ]\n    }\n  ]\n}",
+			ExpectedBody: "{\"text\":\"\",\"attachments\":[{\"title\":\":helmet_with_white_cross: Gatus\",\"text\":\"An alert for *group/name* has been resolved after passing successfully 5 time(s) in a row:\\n\\u003e description-2\",\"short\":false,\"color\":\"#36A64F\",\"fields\":[{\"title\":\"Condition results\",\"value\":\":white_check_mark: - `[CONNECTED] == true`\\n:white_check_mark: - `[STATUS] == 200`\\n\",\"short\":false}]}]}",
 		},
 	}
 	for _, scenario := range scenarios {
@@ -192,11 +193,11 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 				},
 				scenario.Resolved,
 			)
-			if body != scenario.ExpectedBody {
-				t.Errorf("expected %s, got %s", scenario.ExpectedBody, body)
+			if string(body) != scenario.ExpectedBody {
+				t.Errorf("expected:\n%s\ngot:\n%s", scenario.ExpectedBody, body)
 			}
 			out := make(map[string]interface{})
-			if err := json.Unmarshal([]byte(body), &out); err != nil {
+			if err := json.Unmarshal(body, &out); err != nil {
 				t.Error("expected body to be valid JSON, got error:", err.Error())
 			}
 		})

alerting/provider/teams/teams.go

@@ -2,13 +2,14 @@ package teams
 
 import (
 	"bytes"
+	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
 )
 
 // AlertProvider is the configuration necessary for sending an alert using Teams
@@ -44,7 +45,7 @@ func (provider *AlertProvider) IsValid() bool {
 
 // Send an alert using the provider
 func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
-	buffer := bytes.NewBuffer([]byte(provider.buildRequestBody(endpoint, alert, result, resolved)))
+	buffer := bytes.NewBuffer(provider.buildRequestBody(endpoint, alert, result, resolved))
 	request, err := http.NewRequest(http.MethodPost, provider.getWebhookURLForGroup(endpoint.Group), buffer)
 	if err != nil {
 		return err
@@ -54,6 +55,7 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 	if err != nil {
 		return err
 	}
+	defer response.Body.Close()
 	if response.StatusCode > 399 {
 		body, _ := io.ReadAll(response.Body)
 		return fmt.Errorf("call to provider alert returned status code %d: %s", response.StatusCode, string(body))
@@ -61,8 +63,22 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 	return err
 }
 
+type Body struct {
+	Type       string    `json:"@type"`
+	Context    string    `json:"@context"`
+	ThemeColor string    `json:"themeColor"`
+	Title      string    `json:"title"`
+	Text       string    `json:"text"`
+	Sections   []Section `json:"sections"`
+}
+
+type Section struct {
+	ActivityTitle string `json:"activityTitle"`
+	Text          string `json:"text"`
+}
+
 // buildRequestBody builds the request body for the provider
-func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) string {
+func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) []byte {
 	var message, color string
 	if resolved {
 		message = fmt.Sprintf("An alert for *%s* has been resolved after passing successfully %d time(s) in a row", endpoint.DisplayName(), alert.SuccessThreshold)
@@ -83,25 +99,22 @@ func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *
 	}
 	var description string
 	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
-		description = ":\\n> " + alertDescription
+		description = ": " + alertDescription
 	}
-	return fmt.Sprintf(`{
-  "@type": "MessageCard",
-  "@context": "http://schema.org/extensions",
-  "themeColor": "%s",
-  "title": "🚨 Gatus",
-  "text": "%s%s",
-  "sections": [
-    {
-      "activityTitle": "URL",
-      "text": "%s"
-    },
-    {
-      "activityTitle": "Condition results",
-      "text": "%s"
-    }
-  ]
-}`, color, message, description, endpoint.URL, results)
+	body, _ := json.Marshal(Body{
+		Type:       "MessageCard",
+		Context:    "http://schema.org/extensions",
+		ThemeColor: color,
+		Title:      "🚨 Gatus",
+		Text:       message + description,
+		Sections: []Section{
+			{
+				ActivityTitle: "Condition results",
+				Text:          results,
+			},
+		},
+	})
+	return body
 }
 
 // getWebhookURLForGroup returns the appropriate Webhook URL integration to for a given group

alerting/provider/teams/teams_test.go

@@ -5,10 +5,10 @@ import (
 	"net/http"
 	"testing"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v4/test"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
+	"github.com/TwiN/gatus/v5/test"
 )
 
 func TestAlertDefaultProvider_IsValid(t *testing.T) {
@@ -151,14 +151,14 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 			Provider:     AlertProvider{},
 			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     false,
-			ExpectedBody: "{\n  \"@type\": \"MessageCard\",\n  \"@context\": \"http://schema.org/extensions\",\n  \"themeColor\": \"#DD0000\",\n  \"title\": \"&#x1F6A8; Gatus\",\n  \"text\": \"An alert for *endpoint-name* has been triggered due to having failed 3 time(s) in a row:\\n> description-1\",\n  \"sections\": [\n    {\n      \"activityTitle\": \"URL\",\n      \"text\": \"\"\n    },\n    {\n      \"activityTitle\": \"Condition results\",\n      \"text\": \"&#x274C; - `[CONNECTED] == true`<br/>&#x274C; - `[STATUS] == 200`<br/>\"\n    }\n  ]\n}",
+			ExpectedBody: "{\"@type\":\"MessageCard\",\"@context\":\"http://schema.org/extensions\",\"themeColor\":\"#DD0000\",\"title\":\"\\u0026#x1F6A8; Gatus\",\"text\":\"An alert for *endpoint-name* has been triggered due to having failed 3 time(s) in a row: description-1\",\"sections\":[{\"activityTitle\":\"Condition results\",\"text\":\"\\u0026#x274C; - `[CONNECTED] == true`\\u003cbr/\\u003e\\u0026#x274C; - `[STATUS] == 200`\\u003cbr/\\u003e\"}]}",
 		},
 		{
 			Name:         "resolved",
 			Provider:     AlertProvider{},
 			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     true,
-			ExpectedBody: "{\n  \"@type\": \"MessageCard\",\n  \"@context\": \"http://schema.org/extensions\",\n  \"themeColor\": \"#36A64F\",\n  \"title\": \"&#x1F6A8; Gatus\",\n  \"text\": \"An alert for *endpoint-name* has been resolved after passing successfully 5 time(s) in a row:\\n> description-2\",\n  \"sections\": [\n    {\n      \"activityTitle\": \"URL\",\n      \"text\": \"\"\n    },\n    {\n      \"activityTitle\": \"Condition results\",\n      \"text\": \"&#x2705; - `[CONNECTED] == true`<br/>&#x2705; - `[STATUS] == 200`<br/>\"\n    }\n  ]\n}",
+			ExpectedBody: "{\"@type\":\"MessageCard\",\"@context\":\"http://schema.org/extensions\",\"themeColor\":\"#36A64F\",\"title\":\"\\u0026#x1F6A8; Gatus\",\"text\":\"An alert for *endpoint-name* has been resolved after passing successfully 5 time(s) in a row: description-2\",\"sections\":[{\"activityTitle\":\"Condition results\",\"text\":\"\\u0026#x2705; - `[CONNECTED] == true`\\u003cbr/\\u003e\\u0026#x2705; - `[STATUS] == 200`\\u003cbr/\\u003e\"}]}",
 		},
 	}
 	for _, scenario := range scenarios {
@@ -174,11 +174,11 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 				},
 				scenario.Resolved,
 			)
-			if body != scenario.ExpectedBody {
-				t.Errorf("expected %s, got %s", scenario.ExpectedBody, body)
+			if string(body) != scenario.ExpectedBody {
+				t.Errorf("expected:\n%s\ngot:\n%s", scenario.ExpectedBody, body)
 			}
 			out := make(map[string]interface{})
-			if err := json.Unmarshal([]byte(body), &out); err != nil {
+			if err := json.Unmarshal(body, &out); err != nil {
 				t.Error("expected body to be valid JSON, got error:", err.Error())
 			}
 		})

alerting/provider/telegram/telegram.go

@@ -2,13 +2,14 @@ package telegram
 
 import (
 	"bytes"
+	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
 )
 
 const defaultAPIURL = "https://api.telegram.org"
@@ -19,18 +20,24 @@ type AlertProvider struct {
 	ID     string `yaml:"id"`
 	APIURL string `yaml:"api-url"`
 
+	// ClientConfig is the configuration of the client used to communicate with the provider's target
+	ClientConfig *client.Config `yaml:"client,omitempty"`
+
 	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
 	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
 }
 
 // IsValid returns whether the provider's configuration is valid
 func (provider *AlertProvider) IsValid() bool {
+	if provider.ClientConfig == nil {
+		provider.ClientConfig = client.GetDefaultConfig()
+	}
 	return len(provider.Token) > 0 && len(provider.ID) > 0
 }
 
 // Send an alert using the provider
 func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
-	buffer := bytes.NewBuffer([]byte(provider.buildRequestBody(endpoint, alert, result, resolved)))
+	buffer := bytes.NewBuffer(provider.buildRequestBody(endpoint, alert, result, resolved))
 	apiURL := provider.APIURL
 	if apiURL == "" {
 		apiURL = defaultAPIURL
@@ -40,10 +47,11 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 		return err
 	}
 	request.Header.Set("Content-Type", "application/json")
-	response, err := client.GetHTTPClient(nil).Do(request)
+	response, err := client.GetHTTPClient(provider.ClientConfig).Do(request)
 	if err != nil {
 		return err
 	}
+	defer response.Body.Close()
 	if response.StatusCode > 399 {
 		body, _ := io.ReadAll(response.Body)
 		return fmt.Errorf("call to provider alert returned status code %d: %s", response.StatusCode, string(body))
@@ -51,13 +59,19 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 	return err
 }
 
+type Body struct {
+	ChatID    string `json:"chat_id"`
+	Text      string `json:"text"`
+	ParseMode string `json:"parse_mode"`
+}
+
 // buildRequestBody builds the request body for the provider
-func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) string {
+func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) []byte {
 	var message, results string
 	if resolved {
-		message = fmt.Sprintf("An alert for *%s* has been resolved:\\n—\\n    _healthcheck passing successfully %d time(s) in a row_\\n—  ", endpoint.DisplayName(), alert.FailureThreshold)
+		message = fmt.Sprintf("An alert for *%s* has been resolved:\n—\n    _healthcheck passing successfully %d time(s) in a row_\n—  ", endpoint.DisplayName(), alert.FailureThreshold)
 	} else {
-		message = fmt.Sprintf("An alert for *%s* has been triggered:\\n—\\n    _healthcheck failed %d time(s) in a row_\\n—  ", endpoint.DisplayName(), alert.FailureThreshold)
+		message = fmt.Sprintf("An alert for *%s* has been triggered:\n—\n    _healthcheck failed %d time(s) in a row_\n—  ", endpoint.DisplayName(), alert.FailureThreshold)
 	}
 	for _, conditionResult := range result.ConditionResults {
 		var prefix string
@@ -66,15 +80,20 @@ func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *
 		} else {
 			prefix = "❌"
 		}
-		results += fmt.Sprintf("%s - `%s`\\n", prefix, conditionResult.Condition)
+		results += fmt.Sprintf("%s - `%s`\n", prefix, conditionResult.Condition)
 	}
 	var text string
 	if len(alert.GetDescription()) > 0 {
-		text = fmt.Sprintf("⛑ *Gatus* \\n%s \\n*Description* \\n_%s_  \\n\\n*Condition results*\\n%s", message, alert.GetDescription(), results)
+		text = fmt.Sprintf("⛑ *Gatus* \n%s \n*Description* \n_%s_  \n\n*Condition results*\n%s", message, alert.GetDescription(), results)
 	} else {
-		text = fmt.Sprintf("⛑ *Gatus* \\n%s \\n*Condition results*\\n%s", message, results)
+		text = fmt.Sprintf("⛑ *Gatus* \n%s \n*Condition results*\n%s", message, results)
 	}
-	return fmt.Sprintf(`{"chat_id": "%s", "text": "%s", "parse_mode": "MARKDOWN"}`, provider.ID, text)
+	body, _ := json.Marshal(Body{
+		ChatID:    provider.ID,
+		Text:      text,
+		ParseMode: "MARKDOWN",
+	})
+	return body
 }
 
 // GetDefaultAlert returns the provider's default alert configuration

alerting/provider/telegram/telegram_test.go

@@ -5,21 +5,31 @@ import (
 	"net/http"
 	"testing"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v4/test"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
+	"github.com/TwiN/gatus/v5/test"
 )
 
 func TestAlertProvider_IsValid(t *testing.T) {
-	invalidProvider := AlertProvider{Token: "", ID: ""}
-	if invalidProvider.IsValid() {
-		t.Error("provider shouldn't have been valid")
-	}
-	validProvider := AlertProvider{Token: "123456:ABC-DEF1234ghIkl-zyx57W2v1u123ew11", ID: "12345678"}
-	if !validProvider.IsValid() {
-		t.Error("provider should've been valid")
-	}
+	t.Run("invalid-provider", func(t *testing.T) {
+		invalidProvider := AlertProvider{Token: "", ID: ""}
+		if invalidProvider.IsValid() {
+			t.Error("provider shouldn't have been valid")
+		}
+	})
+	t.Run("valid-provider", func(t *testing.T) {
+		validProvider := AlertProvider{Token: "123456:ABC-DEF1234ghIkl-zyx57W2v1u123ew11", ID: "12345678"}
+		if validProvider.ClientConfig != nil {
+			t.Error("provider client config should have been nil prior to IsValid() being executed")
+		}
+		if !validProvider.IsValid() {
+			t.Error("provider should've been valid")
+		}
+		if validProvider.ClientConfig == nil {
+			t.Error("provider client config should have been set after IsValid() was executed")
+		}
+	})
 }
 
 func TestAlertProvider_Send(t *testing.T) {
@@ -114,14 +124,14 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 			Provider:     AlertProvider{ID: "123"},
 			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     false,
-			ExpectedBody: "{\"chat_id\": \"123\", \"text\": \"⛑ *Gatus* \\nAn alert for *endpoint-name* has been triggered:\\n—\\n    _healthcheck failed 3 time(s) in a row_\\n—   \\n*Description* \\n_description-1_  \\n\\n*Condition results*\\n❌ - `[CONNECTED] == true`\\n❌ - `[STATUS] == 200`\\n\", \"parse_mode\": \"MARKDOWN\"}",
+			ExpectedBody: "{\"chat_id\":\"123\",\"text\":\"⛑ *Gatus* \\nAn alert for *endpoint-name* has been triggered:\\n—\\n    _healthcheck failed 3 time(s) in a row_\\n—   \\n*Description* \\n_description-1_  \\n\\n*Condition results*\\n❌ - `[CONNECTED] == true`\\n❌ - `[STATUS] == 200`\\n\",\"parse_mode\":\"MARKDOWN\"}",
 		},
 		{
 			Name:         "resolved",
 			Provider:     AlertProvider{ID: "123"},
 			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     true,
-			ExpectedBody: "{\"chat_id\": \"123\", \"text\": \"⛑ *Gatus* \\nAn alert for *endpoint-name* has been resolved:\\n—\\n    _healthcheck passing successfully 3 time(s) in a row_\\n—   \\n*Description* \\n_description-2_  \\n\\n*Condition results*\\n✅ - `[CONNECTED] == true`\\n✅ - `[STATUS] == 200`\\n\", \"parse_mode\": \"MARKDOWN\"}",
+			ExpectedBody: "{\"chat_id\":\"123\",\"text\":\"⛑ *Gatus* \\nAn alert for *endpoint-name* has been resolved:\\n—\\n    _healthcheck passing successfully 3 time(s) in a row_\\n—   \\n*Description* \\n_description-2_  \\n\\n*Condition results*\\n✅ - `[CONNECTED] == true`\\n✅ - `[STATUS] == 200`\\n\",\"parse_mode\":\"MARKDOWN\"}",
 		},
 	}
 	for _, scenario := range scenarios {
@@ -137,11 +147,11 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 				},
 				scenario.Resolved,
 			)
-			if body != scenario.ExpectedBody {
-				t.Errorf("expected %s, got %s", scenario.ExpectedBody, body)
+			if string(body) != scenario.ExpectedBody {
+				t.Errorf("expected:\n%s\ngot:\n%s", scenario.ExpectedBody, body)
 			}
 			out := make(map[string]interface{})
-			if err := json.Unmarshal([]byte(body), &out); err != nil {
+			if err := json.Unmarshal(body, &out); err != nil {
 				t.Error("expected body to be valid JSON, got error:", err.Error())
 			}
 		})

alerting/provider/twilio/twilio.go

@@ -8,9 +8,9 @@ import (
 	"net/http"
 	"net/url"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core"
 )
 
 // AlertProvider is the configuration necessary for sending an alert using Twilio
@@ -42,6 +42,7 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 	if err != nil {
 		return err
 	}
+	defer response.Body.Close()
 	if response.StatusCode > 399 {
 		body, _ := io.ReadAll(response.Body)
 		return fmt.Errorf("call to provider alert returned status code %d: %s", response.StatusCode, string(body))

alerting/provider/twilio/twilio_test.go

@@ -3,8 +3,8 @@ package twilio
 import (
 	"testing"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/core"
 )
 
 func TestTwilioAlertProvider_IsValid(t *testing.T) {

client/client.go

@@ -4,6 +4,7 @@ import (
 	"crypto/tls"
 	"crypto/x509"
 	"errors"
+	"fmt"
 	"net"
 	"net/http"
 	"net/smtp"
@@ -11,13 +12,21 @@ import (
 	"strings"
 	"time"
 
+	"github.com/TwiN/gocache/v2"
+	"github.com/TwiN/whois"
 	"github.com/go-ping/ping"
+	"github.com/ishidawataru/sctp"
 )
 
-// injectedHTTPClient is used for testing purposes
-var injectedHTTPClient *http.Client
+var (
+	// injectedHTTPClient is used for testing purposes
+	injectedHTTPClient *http.Client
 
-// GetHTTPClient returns the shared HTTP client
+	whoisClient              = whois.NewClient().WithReferralCache(true)
+	whoisExpirationDateCache = gocache.NewCache().WithMaxSize(10000).WithDefaultTTL(24 * time.Hour)
+)
+
+// GetHTTPClient returns the shared HTTP client, or the client from the configuration passed
 func GetHTTPClient(config *Config) *http.Client {
 	if injectedHTTPClient != nil {
 		return injectedHTTPClient
@@ -28,6 +37,35 @@ func GetHTTPClient(config *Config) *http.Client {
 	return config.getHTTPClient()
 }
 
+// GetDomainExpiration retrieves the duration until the domain provided expires
+func GetDomainExpiration(hostname string) (domainExpiration time.Duration, err error) {
+	var retrievedCachedValue bool
+	if v, exists := whoisExpirationDateCache.Get(hostname); exists {
+		domainExpiration = time.Until(v.(time.Time))
+		retrievedCachedValue = true
+		// If the domain OR the TTL is not going to expire in less than 24 hours
+		// we don't have to refresh the cache. Otherwise, we'll refresh it.
+		cacheEntryTTL, _ := whoisExpirationDateCache.TTL(hostname)
+		if cacheEntryTTL > 24*time.Hour && domainExpiration > 24*time.Hour {
+			// No need to refresh, so we'll just return the cached values
+			return domainExpiration, nil
+		}
+	}
+	if whoisResponse, err := whoisClient.QueryAndParse(hostname); err != nil {
+		if !retrievedCachedValue { // Add an error unless we already retrieved a cached value
+			return 0, fmt.Errorf("error querying and parsing hostname using whois client: %w", err)
+		}
+	} else {
+		domainExpiration = time.Until(whoisResponse.ExpirationDate)
+		if domainExpiration > 720*time.Hour {
+			whoisExpirationDateCache.SetWithTTL(hostname, whoisResponse.ExpirationDate, 240*time.Hour)
+		} else {
+			whoisExpirationDateCache.SetWithTTL(hostname, whoisResponse.ExpirationDate, 72*time.Hour)
+		}
+	}
+	return domainExpiration, nil
+}
+
 // CanCreateTCPConnection checks whether a connection can be established with a TCP endpoint
 func CanCreateTCPConnection(address string, config *Config) bool {
 	conn, err := net.DialTimeout("tcp", address, config.Timeout)
@@ -38,6 +76,41 @@ func CanCreateTCPConnection(address string, config *Config) bool {
 	return true
 }
 
+// CanCreateUDPConnection checks whether a connection can be established with a UDP endpoint
+func CanCreateUDPConnection(address string, config *Config) bool {
+	conn, err := net.DialTimeout("udp", address, config.Timeout)
+	if err != nil {
+		return false
+	}
+	_ = conn.Close()
+	return true
+}
+
+// CanCreateSCTPConnection checks whether a connection can be established with a SCTP endpoint
+func CanCreateSCTPConnection(address string, config *Config) bool {
+	ch := make(chan bool)
+	go (func(res chan bool) {
+		addr, err := sctp.ResolveSCTPAddr("sctp", address)
+		if err != nil {
+			res <- false
+		}
+
+		conn, err := sctp.DialSCTP("sctp", nil, addr)
+		if err != nil {
+			res <- false
+		}
+		_ = conn.Close()
+		res <- true
+	})(ch)
+
+	select {
+	case result := <-ch:
+		return result
+	case <-time.After(config.Timeout):
+		return false
+	}
+}
+
 // CanPerformStartTLS checks whether a connection can be established to an address using the STARTTLS protocol
 func CanPerformStartTLS(address string, config *Config) (connected bool, certificate *x509.Certificate, err error) {
 	hostAndPort := strings.Split(address, ":")

client/client_test.go

@@ -7,7 +7,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/TwiN/gatus/v4/test"
+	"github.com/TwiN/gatus/v5/test"
 )
 
 func TestGetHTTPClient(t *testing.T) {
@@ -35,6 +35,33 @@ func TestGetHTTPClient(t *testing.T) {
 	}
 }
 
+func TestGetDomainExpiration(t *testing.T) {
+	if domainExpiration, err := GetDomainExpiration("example.com"); err != nil {
+		t.Fatalf("expected error to be nil, but got: `%s`", err)
+	} else if domainExpiration <= 0 {
+		t.Error("expected domain expiration to be higher than 0")
+	}
+	if domainExpiration, err := GetDomainExpiration("example.com"); err != nil {
+		t.Errorf("expected error to be nil, but got: `%s`", err)
+	} else if domainExpiration <= 0 {
+		t.Error("expected domain expiration to be higher than 0")
+	}
+	// Hack to pretend like the domain is expiring in 1 hour, which should trigger a refresh
+	whoisExpirationDateCache.SetWithTTL("example.com", time.Now().Add(time.Hour), 25*time.Hour)
+	if domainExpiration, err := GetDomainExpiration("example.com"); err != nil {
+		t.Errorf("expected error to be nil, but got: `%s`", err)
+	} else if domainExpiration <= 0 {
+		t.Error("expected domain expiration to be higher than 0")
+	}
+	// Make sure the refresh works when the ttl is <24 hours
+	whoisExpirationDateCache.SetWithTTL("example.com", time.Now().Add(35*time.Hour), 23*time.Hour)
+	if domainExpiration, err := GetDomainExpiration("example.com"); err != nil {
+		t.Errorf("expected error to be nil, but got: `%s`", err)
+	} else if domainExpiration <= 0 {
+		t.Error("expected domain expiration to be higher than 0")
+	}
+}
+
 func TestPing(t *testing.T) {
 	if success, rtt := Ping("127.0.0.1", &Config{Timeout: 500 * time.Millisecond}); !success {
 		t.Error("expected true")

client/config.go

@@ -49,7 +49,7 @@ type Config struct {
 	Timeout time.Duration `yaml:"timeout"`
 
 	// DNSResolver override for the HTTP client
-	// Expected format is {protocol}://{host}:{port}, e.g. tcp://1.1.1.1:53
+	// Expected format is {protocol}://{host}:{port}, e.g. tcp://8.8.8.8:53
 	DNSResolver string `yaml:"dns-resolver,omitempty"`
 
 	// OAuth2Config is the OAuth2 configuration used for the client.

config.yaml

@@ -31,7 +31,7 @@ endpoints:
       - "[STATUS] == 200"
 
   - name: example-dns-query
-    url: "1.1.1.1" # Address of the DNS server to use
+    url: "8.8.8.8" # Address of the DNS server to use
     interval: 5m
     dns:
       query-name: "example.com"
@@ -45,3 +45,9 @@ endpoints:
     interval: 1m
     conditions:
       - "[CONNECTED] == true"
+
+  - name: check-domain-expiration
+    url: "https://example.org/"
+    interval: 1h
+    conditions:
+      - "[DOMAIN_EXPIRATION] > 720h"

config/config.go

@@ -2,19 +2,22 @@ package config
 
 import (
 	"errors"
+	"fmt"
 	"log"
 	"os"
 	"time"
 
-	"github.com/TwiN/gatus/v4/alerting"
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/alerting/provider"
-	"github.com/TwiN/gatus/v4/config/maintenance"
-	"github.com/TwiN/gatus/v4/config/ui"
-	"github.com/TwiN/gatus/v4/config/web"
-	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v4/security"
-	"github.com/TwiN/gatus/v4/storage"
+	"github.com/TwiN/gatus/v5/alerting"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/alerting/provider"
+	"github.com/TwiN/gatus/v5/config/maintenance"
+	"github.com/TwiN/gatus/v5/config/remote"
+	"github.com/TwiN/gatus/v5/config/ui"
+	"github.com/TwiN/gatus/v5/config/web"
+	"github.com/TwiN/gatus/v5/core"
+	"github.com/TwiN/gatus/v5/security"
+	"github.com/TwiN/gatus/v5/storage"
+	"github.com/TwiN/gatus/v5/util"
 	"gopkg.in/yaml.v2"
 )
 
@@ -65,14 +68,6 @@ type Config struct {
 	// Endpoints List of endpoints to monitor
 	Endpoints []*core.Endpoint `yaml:"endpoints,omitempty"`
 
-	// Services List of endpoints to monitor
-	//
-	// XXX: Remove this in v5.0.0
-	// XXX: This is not a typo -- not v4.0.0, but v5.0.0 -- I want to give enough time for people to migrate
-	//
-	// Deprecated in favor of Endpoints
-	Services []*core.Endpoint `yaml:"services,omitempty"`
-
 	// Storage is the configuration for how the data is stored
 	Storage *storage.Config `yaml:"storage,omitempty"`
 
@@ -85,10 +80,24 @@ type Config struct {
 	// Maintenance is the configuration for creating a maintenance window in which no alerts are sent
 	Maintenance *maintenance.Config `yaml:"maintenance,omitempty"`
 
+	// Remote is the configuration for remote Gatus instances
+	// WARNING: This is in ALPHA and may change or be completely removed in the future
+	Remote *remote.Config `yaml:"remote,omitempty"`
+
 	filePath        string    // path to the file from which config was loaded from
 	lastFileModTime time.Time // last modification time
 }
 
+func (config *Config) GetEndpointByKey(key string) *core.Endpoint {
+	for i := 0; i < len(config.Endpoints); i++ {
+		ep := config.Endpoints[i]
+		if util.ConvertGroupAndEndpointNameToKey(ep.Group, ep.Name) == key {
+			return ep
+		}
+	}
+	return nil
+}
+
 // HasLoadedConfigurationFileBeenModified returns whether the file that the
 // configuration has been loaded from has been modified since it was last read
 func (config Config) HasLoadedConfigurationFileBeenModified() bool {
@@ -156,12 +165,6 @@ func parseAndValidateConfigBytes(yamlBytes []byte) (config *Config, err error) {
 	if err = yaml.Unmarshal(yamlBytes, &config); err != nil {
 		return
 	}
-	if config != nil && len(config.Services) > 0 { // XXX: Remove this in v5.0.0
-		log.Println("WARNING: Your configuration is using 'services:', which is deprecated in favor of 'endpoints:'.")
-		log.Println("WARNING: See https://github.com/TwiN/gatus/issues/191 for more information")
-		config.Endpoints = append(config.Endpoints, config.Services...)
-		config.Services = nil
-	}
 	// Check if the configuration file at least has endpoints configured
 	if config == nil || config.Endpoints == nil || len(config.Endpoints) == 0 {
 		err = ErrNoEndpointInConfig
@@ -185,10 +188,22 @@ func parseAndValidateConfigBytes(yamlBytes []byte) (config *Config, err error) {
 		if err := validateStorageConfig(config); err != nil {
 			return nil, err
 		}
+		if err := validateRemoteConfig(config); err != nil {
+			return nil, err
+		}
 	}
 	return
 }
 
+func validateRemoteConfig(config *Config) error {
+	if config.Remote != nil {
+		if err := config.Remote.ValidateAndSetDefaults(); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
 func validateStorageConfig(config *Config) error {
 	if config.Storage == nil {
 		config.Storage = &storage.Config{
@@ -239,7 +254,7 @@ func validateEndpointsConfig(config *Config) error {
 			log.Printf("[config][validateEndpointsConfig] Validating endpoint '%s'", endpoint.Name)
 		}
 		if err := endpoint.ValidateAndSetDefaults(); err != nil {
-			return err
+			return fmt.Errorf("invalid endpoint %s: %w", endpoint.DisplayName(), err)
 		}
 	}
 	log.Printf("[config][validateEndpointsConfig] Validated %d endpoints", len(config.Endpoints))
@@ -273,9 +288,12 @@ func validateAlertingConfig(alertingConfig *alerting.Config, endpoints []*core.E
 	alertTypes := []alert.Type{
 		alert.TypeCustom,
 		alert.TypeDiscord,
+		alert.TypeGoogleChat,
 		alert.TypeEmail,
+		alert.TypeMatrix,
 		alert.TypeMattermost,
 		alert.TypeMessagebird,
+		alert.TypeNtfy,
 		alert.TypeOpsgenie,
 		alert.TypePagerDuty,
 		alert.TypeSlack,

config/config_test.go

@@ -5,22 +5,27 @@ import (
 	"testing"
 	"time"
 
-	"github.com/TwiN/gatus/v4/alerting"
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/alerting/provider/custom"
-	"github.com/TwiN/gatus/v4/alerting/provider/discord"
-	"github.com/TwiN/gatus/v4/alerting/provider/mattermost"
-	"github.com/TwiN/gatus/v4/alerting/provider/messagebird"
-	"github.com/TwiN/gatus/v4/alerting/provider/pagerduty"
-	"github.com/TwiN/gatus/v4/alerting/provider/slack"
-	"github.com/TwiN/gatus/v4/alerting/provider/teams"
-	"github.com/TwiN/gatus/v4/alerting/provider/telegram"
-	"github.com/TwiN/gatus/v4/alerting/provider/twilio"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/config/ui"
-	"github.com/TwiN/gatus/v4/config/web"
-	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v4/storage"
+	"github.com/TwiN/gatus/v5/alerting"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/alerting/provider"
+	"github.com/TwiN/gatus/v5/alerting/provider/custom"
+	"github.com/TwiN/gatus/v5/alerting/provider/discord"
+	"github.com/TwiN/gatus/v5/alerting/provider/email"
+	"github.com/TwiN/gatus/v5/alerting/provider/googlechat"
+	"github.com/TwiN/gatus/v5/alerting/provider/matrix"
+	"github.com/TwiN/gatus/v5/alerting/provider/mattermost"
+	"github.com/TwiN/gatus/v5/alerting/provider/messagebird"
+	"github.com/TwiN/gatus/v5/alerting/provider/ntfy"
+	"github.com/TwiN/gatus/v5/alerting/provider/opsgenie"
+	"github.com/TwiN/gatus/v5/alerting/provider/pagerduty"
+	"github.com/TwiN/gatus/v5/alerting/provider/slack"
+	"github.com/TwiN/gatus/v5/alerting/provider/teams"
+	"github.com/TwiN/gatus/v5/alerting/provider/telegram"
+	"github.com/TwiN/gatus/v5/alerting/provider/twilio"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/web"
+	"github.com/TwiN/gatus/v5/core"
+	"github.com/TwiN/gatus/v5/storage"
 )
 
 func TestLoadFileThatDoesNotExist(t *testing.T) {
@@ -39,10 +44,6 @@ func TestLoadDefaultConfigurationFile(t *testing.T) {
 
 func TestParseAndValidateConfigBytes(t *testing.T) {
 	file := t.TempDir() + "/test.db"
-	ui.StaticFolder = "../web/static"
-	defer func() {
-		ui.StaticFolder = "./web/static"
-	}()
 	config, err := parseAndValidateConfigBytes([]byte(fmt.Sprintf(`
 storage:
   type: sqlite
@@ -453,26 +454,21 @@ endpoints:
     url: https://twin.sh/health
     alerts:
       - type: slack
-        enabled: true
       - type: pagerduty
-        enabled: true
         failure-threshold: 7
         success-threshold: 5
         description: "Healthcheck failed 7 times in a row"
       - type: mattermost
-        enabled: true
       - type: messagebird
+        enabled: false
       - type: discord
-        enabled: true
         failure-threshold: 10
       - type: telegram
         enabled: true
       - type: twilio
-        enabled: true
         failure-threshold: 12
         success-threshold: 15
       - type: teams
-        enabled: true
     conditions:
       - "[STATUS] == 200"
 `))
@@ -1125,7 +1121,7 @@ endpoints:
     conditions:
       - "[STATUS] == 200"
 `))
-	if err != core.ErrEndpointWithNoName {
+	if err == nil {
 		t.Error("should've returned an error")
 	}
 }
@@ -1225,87 +1221,43 @@ func TestGetAlertingProviderByAlertType(t *testing.T) {
 	alertingConfig := &alerting.Config{
 		Custom:      &custom.AlertProvider{},
 		Discord:     &discord.AlertProvider{},
+		Email:       &email.AlertProvider{},
+		GoogleChat:  &googlechat.AlertProvider{},
+		Matrix:      &matrix.AlertProvider{},
 		Mattermost:  &mattermost.AlertProvider{},
 		Messagebird: &messagebird.AlertProvider{},
+		Ntfy:        &ntfy.AlertProvider{},
+		Opsgenie:    &opsgenie.AlertProvider{},
 		PagerDuty:   &pagerduty.AlertProvider{},
 		Slack:       &slack.AlertProvider{},
 		Telegram:    &telegram.AlertProvider{},
 		Twilio:      &twilio.AlertProvider{},
 		Teams:       &teams.AlertProvider{},
 	}
-	if alertingConfig.GetAlertingProviderByAlertType(alert.TypeCustom) != alertingConfig.Custom {
-		t.Error("expected Custom configuration")
+	scenarios := []struct {
+		alertType alert.Type
+		expected  provider.AlertProvider
+	}{
+		{alertType: alert.TypeCustom, expected: alertingConfig.Custom},
+		{alertType: alert.TypeDiscord, expected: alertingConfig.Discord},
+		{alertType: alert.TypeEmail, expected: alertingConfig.Email},
+		{alertType: alert.TypeGoogleChat, expected: alertingConfig.GoogleChat},
+		{alertType: alert.TypeMatrix, expected: alertingConfig.Matrix},
+		{alertType: alert.TypeMattermost, expected: alertingConfig.Mattermost},
+		{alertType: alert.TypeMessagebird, expected: alertingConfig.Messagebird},
+		{alertType: alert.TypeNtfy, expected: alertingConfig.Ntfy},
+		{alertType: alert.TypeOpsgenie, expected: alertingConfig.Opsgenie},
+		{alertType: alert.TypePagerDuty, expected: alertingConfig.PagerDuty},
+		{alertType: alert.TypeSlack, expected: alertingConfig.Slack},
+		{alertType: alert.TypeTelegram, expected: alertingConfig.Telegram},
+		{alertType: alert.TypeTwilio, expected: alertingConfig.Twilio},
+		{alertType: alert.TypeTeams, expected: alertingConfig.Teams},
 	}
-	if alertingConfig.GetAlertingProviderByAlertType(alert.TypeDiscord) != alertingConfig.Discord {
-		t.Error("expected Discord configuration")
-	}
-	if alertingConfig.GetAlertingProviderByAlertType(alert.TypeMattermost) != alertingConfig.Mattermost {
-		t.Error("expected Mattermost configuration")
-	}
-	if alertingConfig.GetAlertingProviderByAlertType(alert.TypeMessagebird) != alertingConfig.Messagebird {
-		t.Error("expected Messagebird configuration")
-	}
-	if alertingConfig.GetAlertingProviderByAlertType(alert.TypePagerDuty) != alertingConfig.PagerDuty {
-		t.Error("expected PagerDuty configuration")
-	}
-	if alertingConfig.GetAlertingProviderByAlertType(alert.TypeSlack) != alertingConfig.Slack {
-		t.Error("expected Slack configuration")
-	}
-	if alertingConfig.GetAlertingProviderByAlertType(alert.TypeTelegram) != alertingConfig.Telegram {
-		t.Error("expected Telegram configuration")
-	}
-	if alertingConfig.GetAlertingProviderByAlertType(alert.TypeTwilio) != alertingConfig.Twilio {
-		t.Error("expected Twilio configuration")
-	}
-	if alertingConfig.GetAlertingProviderByAlertType(alert.TypeTeams) != alertingConfig.Teams {
-		t.Error("expected Teams configuration")
-	}
-}
-
-// XXX: Remove this in v5.0.0
-func TestParseAndValidateConfigBytes_backwardCompatibleWithServices(t *testing.T) {
-	config, err := parseAndValidateConfigBytes([]byte(`
-services:
-  - name: website
-    url: https://twin.sh/actuator/health
-    conditions:
-      - "[STATUS] == 200"
-`))
-	if err != nil {
-		t.Error("expected no error, got", err.Error())
-	}
-	if config == nil {
-		t.Fatal("Config shouldn't have been nil")
-	}
-	if config.Endpoints[0].URL != "https://twin.sh/actuator/health" {
-		t.Errorf("URL should have been %s", "https://twin.sh/actuator/health")
-	}
-	if config.Endpoints[0].Interval != 60*time.Second {
-		t.Errorf("Interval should have been %s, because it is the default value", 60*time.Second)
-	}
-}
-
-// XXX: Remove this in v5.0.0
-func TestParseAndValidateConfigBytes_backwardCompatibleMergeServicesInEndpoints(t *testing.T) {
-	config, err := parseAndValidateConfigBytes([]byte(`
-services:
-  - name: website1
-    url: https://twin.sh/actuator/health
-    conditions:
-      - "[STATUS] == 200"
-endpoints:
-  - name: website2
-    url: https://twin.sh/actuator/health
-    conditions:
-      - "[STATUS] == 200"
-`))
-	if err != nil {
-		t.Error("expected no error, got", err.Error())
-	}
-	if config == nil {
-		t.Fatal("Config shouldn't have been nil")
-	}
-	if len(config.Endpoints) != 2 {
-		t.Error("services should've been merged in endpoints")
+	for _, scenario := range scenarios {
+		t.Run(string(scenario.alertType), func(t *testing.T) {
+			if alertingConfig.GetAlertingProviderByAlertType(scenario.alertType) != scenario.expected {
+				t.Errorf("expected %s configuration", scenario.alertType)
+			}
+		})
 	}
 }

config/remote/remote.go

@@ -0,0 +1,39 @@
+package remote
+
+import (
+	"log"
+
+	"github.com/TwiN/gatus/v5/client"
+)
+
+// NOTICE: This is an experimental alpha feature and may be updated/removed in future versions.
+// For more information, see https://github.com/TwiN/gatus/issues/64
+
+type Config struct {
+	// Instances is a list of remote instances to retrieve endpoint statuses from.
+	Instances []Instance `yaml:"instances,omitempty"`
+
+	// ClientConfig is the configuration of the client used to communicate with the provider's target
+	ClientConfig *client.Config `yaml:"client,omitempty"`
+}
+
+type Instance struct {
+	EndpointPrefix string `yaml:"endpoint-prefix"`
+	URL            string `yaml:"url"`
+}
+
+func (c *Config) ValidateAndSetDefaults() error {
+	if c.ClientConfig == nil {
+		c.ClientConfig = client.GetDefaultConfig()
+	} else {
+		if err := c.ClientConfig.ValidateAndSetDefaults(); err != nil {
+			return err
+		}
+	}
+	if len(c.Instances) > 0 {
+		log.Println("WARNING: Your configuration is using 'remote', which is in alpha and may be updated/removed in future versions.")
+		log.Println("WARNING: See https://github.com/TwiN/gatus/issues/64 for more information")
+		log.Println("WARNING: This feature is a candidate for removal in future versions. Please comment on the issue above if you need this feature.")
+	}
+	return nil
+}

config/ui/ui.go

@@ -4,30 +4,30 @@ import (
 	"bytes"
 	"errors"
 	"html/template"
+
+	static "github.com/TwiN/gatus/v5/web"
 )
 
 const (
-	defaultTitle  = "Health Dashboard | Gatus"
-	defaultHeader = "Health Status"
-	defaultLogo   = ""
-	defaultLink   = ""
+	defaultTitle       = "Health Dashboard | Gatus"
+	defaultDescription = "Gatus is an advanced automated status page that lets you monitor your applications and configure alerts to notify you if there's an issue"
+	defaultHeader      = "Health Status"
+	defaultLogo        = ""
+	defaultLink        = ""
 )
 
 var (
-	// StaticFolder is the path to the location of the static folder from the root path of the project
-	// The only reason this is exposed is to allow running tests from a different path than the root path of the project
-	StaticFolder = "./web/static"
-
 	ErrButtonValidationFailed = errors.New("invalid button configuration: missing required name or link")
 )
 
 // Config is the configuration for the UI of Gatus
 type Config struct {
-	Title   string   `yaml:"title,omitempty"`   // Title of the page
-	Header  string   `yaml:"header,omitempty"`  // Header is the text at the top of the page
-	Logo    string   `yaml:"logo,omitempty"`    // Logo to display on the page
-	Link    string   `yaml:"link,omitempty"`    // Link to open when clicking on the logo
-	Buttons []Button `yaml:"buttons,omitempty"` // Buttons to display below the header
+	Title       string   `yaml:"title,omitempty"`       // Title of the page
+	Description string   `yaml:"description,omitempty"` // Meta description of the page
+	Header      string   `yaml:"header,omitempty"`      // Header is the text at the top of the page
+	Logo        string   `yaml:"logo,omitempty"`        // Logo to display on the page
+	Link        string   `yaml:"link,omitempty"`        // Link to open when clicking on the logo
+	Buttons     []Button `yaml:"buttons,omitempty"`     // Buttons to display below the header
 }
 
 // Button is the configuration for a button on the UI
@@ -47,10 +47,11 @@ func (btn *Button) Validate() error {
 // GetDefaultConfig returns a Config struct with the default values
 func GetDefaultConfig() *Config {
 	return &Config{
-		Title:  defaultTitle,
-		Header: defaultHeader,
-		Logo:   defaultLogo,
-		Link:   defaultLink,
+		Title:       defaultTitle,
+		Description: defaultDescription,
+		Header:      defaultHeader,
+		Logo:        defaultLogo,
+		Link:        defaultLink,
 	}
 }
 
@@ -59,6 +60,9 @@ func (cfg *Config) ValidateAndSetDefaults() error {
 	if len(cfg.Title) == 0 {
 		cfg.Title = defaultTitle
 	}
+	if len(cfg.Description) == 0 {
+		cfg.Description = defaultDescription
+	}
 	if len(cfg.Header) == 0 {
 		cfg.Header = defaultHeader
 	}
@@ -71,7 +75,7 @@ func (cfg *Config) ValidateAndSetDefaults() error {
 		}
 	}
 	// Validate that the template works
-	t, err := template.ParseFiles(StaticFolder + "/index.html")
+	t, err := template.ParseFS(static.FileSystem, static.IndexPath)
 	if err != nil {
 		return err
 	}

config/ui/ui_test.go

@@ -6,15 +6,12 @@ import (
 )
 
 func TestConfig_ValidateAndSetDefaults(t *testing.T) {
-	StaticFolder = "../../web/static"
-	defer func() {
-		StaticFolder = "./web/static"
-	}()
 	cfg := &Config{
-		Title:  "",
-		Header: "",
-		Logo:   "",
-		Link:   "",
+		Title:       "",
+		Description: "",
+		Header:      "",
+		Logo:        "",
+		Link:        "",
 	}
 	if err := cfg.ValidateAndSetDefaults(); err != nil {
 		t.Error("expected no error, got", err.Error())
@@ -22,6 +19,9 @@ func TestConfig_ValidateAndSetDefaults(t *testing.T) {
 	if cfg.Title != defaultTitle {
 		t.Errorf("expected title to be %s, got %s", defaultTitle, cfg.Title)
 	}
+	if cfg.Description != defaultDescription {
+		t.Errorf("expected description to be %s, got %s", defaultDescription, cfg.Description)
+	}
 	if cfg.Header != defaultHeader {
 		t.Errorf("expected header to be %s, got %s", defaultHeader, cfg.Header)
 	}

controller/controller.go

@@ -8,10 +8,8 @@ import (
 	"os"
 	"time"
 
-	"github.com/TwiN/gatus/v4/config/ui"
-	"github.com/TwiN/gatus/v4/config/web"
-	"github.com/TwiN/gatus/v4/controller/handler"
-	"github.com/TwiN/gatus/v4/security"
+	"github.com/TwiN/gatus/v5/config"
+	"github.com/TwiN/gatus/v5/controller/handler"
 )
 
 var (
@@ -21,19 +19,19 @@ var (
 )
 
 // Handle creates the router and starts the server
-func Handle(securityConfig *security.Config, webConfig *web.Config, uiConfig *ui.Config, enableMetrics bool) {
-	var router http.Handler = handler.CreateRouter(ui.StaticFolder, securityConfig, uiConfig, enableMetrics)
+func Handle(cfg *config.Config) {
+	var router http.Handler = handler.CreateRouter(cfg)
 	if os.Getenv("ENVIRONMENT") == "dev" {
 		router = handler.DevelopmentCORS(router)
 	}
 	server = &http.Server{
-		Addr:         fmt.Sprintf("%s:%d", webConfig.Address, webConfig.Port),
+		Addr:         fmt.Sprintf("%s:%d", cfg.Web.Address, cfg.Web.Port),
 		Handler:      router,
 		ReadTimeout:  15 * time.Second,
 		WriteTimeout: 15 * time.Second,
 		IdleTimeout:  15 * time.Second,
 	}
-	log.Println("[controller][Handle] Listening on " + webConfig.SocketAddress())
+	log.Println("[controller][Handle] Listening on " + cfg.Web.SocketAddress())
 	if os.Getenv("ROUTER_TEST") == "true" {
 		return
 	}

controller/controller_test.go

@@ -7,9 +7,9 @@ import (
 	"os"
 	"testing"
 
-	"github.com/TwiN/gatus/v4/config"
-	"github.com/TwiN/gatus/v4/config/web"
-	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v5/config"
+	"github.com/TwiN/gatus/v5/config/web"
+	"github.com/TwiN/gatus/v5/core"
 )
 
 func TestHandle(t *testing.T) {
@@ -32,7 +32,7 @@ func TestHandle(t *testing.T) {
 	_ = os.Setenv("ROUTER_TEST", "true")
 	_ = os.Setenv("ENVIRONMENT", "dev")
 	defer os.Clearenv()
-	Handle(cfg.Security, cfg.Web, cfg.UI, cfg.Metrics)
+	Handle(cfg)
 	defer Shutdown()
 	request, _ := http.NewRequest("GET", "/health", http.NoBody)
 	responseRecorder := httptest.NewRecorder()

controller/handler/badge.go

@@ -7,9 +7,10 @@ import (
 	"strings"
 	"time"
 
-	"github.com/TwiN/gatus/v4/storage/store"
-	"github.com/TwiN/gatus/v4/storage/store/common"
-	"github.com/TwiN/gatus/v4/storage/store/common/paging"
+	"github.com/TwiN/gatus/v5/config"
+	"github.com/TwiN/gatus/v5/storage/store"
+	"github.com/TwiN/gatus/v5/storage/store/common"
+	"github.com/TwiN/gatus/v5/storage/store/common/paging"
 	"github.com/gorilla/mux"
 )
 
@@ -28,6 +29,10 @@ const (
 	HealthStatusUnknown = "?"
 )
 
+var (
+	badgeColors = []string{badgeColorHexAwesome, badgeColorHexGreat, badgeColorHexGood, badgeColorHexPassable, badgeColorHexBad}
+)
+
 // UptimeBadge handles the automatic generation of badge based on the group name and endpoint name passed.
 //
 // Valid values for {duration}: 7d, 24h, 1h
@@ -68,38 +73,40 @@ func UptimeBadge(writer http.ResponseWriter, request *http.Request) {
 // ResponseTimeBadge handles the automatic generation of badge based on the group name and endpoint name passed.
 //
 // Valid values for {duration}: 7d, 24h, 1h
-func ResponseTimeBadge(writer http.ResponseWriter, request *http.Request) {
-	variables := mux.Vars(request)
-	duration := variables["duration"]
-	var from time.Time
-	switch duration {
-	case "7d":
-		from = time.Now().Add(-7 * 24 * time.Hour)
-	case "24h":
-		from = time.Now().Add(-24 * time.Hour)
-	case "1h":
-		from = time.Now().Add(-2 * time.Hour) // Because response time metrics are stored by hour, we have to cheat a little
-	default:
-		http.Error(writer, "Durations supported: 7d, 24h, 1h", http.StatusBadRequest)
-		return
-	}
-	key := variables["key"]
-	averageResponseTime, err := store.Get().GetAverageResponseTimeByKey(key, from, time.Now())
-	if err != nil {
-		if err == common.ErrEndpointNotFound {
-			http.Error(writer, err.Error(), http.StatusNotFound)
-		} else if err == common.ErrInvalidTimeRange {
-			http.Error(writer, err.Error(), http.StatusBadRequest)
-		} else {
-			http.Error(writer, err.Error(), http.StatusInternalServerError)
+func ResponseTimeBadge(config *config.Config) http.HandlerFunc {
+	return func(writer http.ResponseWriter, request *http.Request) {
+		variables := mux.Vars(request)
+		duration := variables["duration"]
+		var from time.Time
+		switch duration {
+		case "7d":
+			from = time.Now().Add(-7 * 24 * time.Hour)
+		case "24h":
+			from = time.Now().Add(-24 * time.Hour)
+		case "1h":
+			from = time.Now().Add(-2 * time.Hour) // Because response time metrics are stored by hour, we have to cheat a little
+		default:
+			http.Error(writer, "Durations supported: 7d, 24h, 1h", http.StatusBadRequest)
+			return
 		}
-		return
+		key := variables["key"]
+		averageResponseTime, err := store.Get().GetAverageResponseTimeByKey(key, from, time.Now())
+		if err != nil {
+			if err == common.ErrEndpointNotFound {
+				http.Error(writer, err.Error(), http.StatusNotFound)
+			} else if err == common.ErrInvalidTimeRange {
+				http.Error(writer, err.Error(), http.StatusBadRequest)
+			} else {
+				http.Error(writer, err.Error(), http.StatusInternalServerError)
+			}
+			return
+		}
+		writer.Header().Set("Content-Type", "image/svg+xml")
+		writer.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
+		writer.Header().Set("Expires", "0")
+		writer.WriteHeader(http.StatusOK)
+		_, _ = writer.Write(generateResponseTimeBadgeSVG(duration, averageResponseTime, key, config))
 	}
-	writer.Header().Set("Content-Type", "image/svg+xml")
-	writer.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
-	writer.Header().Set("Expires", "0")
-	writer.WriteHeader(http.StatusOK)
-	_, _ = writer.Write(generateResponseTimeBadgeSVG(duration, averageResponseTime))
 }
 
 // HealthBadge handles the automatic generation of badge based on the group name and endpoint name passed.
@@ -199,7 +206,7 @@ func getBadgeColorFromUptime(uptime float64) string {
 	return badgeColorHexVeryBad
 }
 
-func generateResponseTimeBadgeSVG(duration string, averageResponseTime int) []byte {
+func generateResponseTimeBadgeSVG(duration string, averageResponseTime int, key string, cfg *config.Config) []byte {
 	var labelWidth, valueWidth int
 	switch duration {
 	case "7d":
@@ -210,7 +217,7 @@ func generateResponseTimeBadgeSVG(duration string, averageResponseTime int) []by
 		labelWidth = 105
 	default:
 	}
-	color := getBadgeColorFromResponseTime(averageResponseTime)
+	color := getBadgeColorFromResponseTime(averageResponseTime, key, cfg)
 	sanitizedValue := strconv.Itoa(averageResponseTime) + "ms"
 	valueWidth = len(sanitizedValue) * 11
 	width := labelWidth + valueWidth
@@ -247,17 +254,13 @@ func generateResponseTimeBadgeSVG(duration string, averageResponseTime int) []by
 	return svg
 }
 
-func getBadgeColorFromResponseTime(responseTime int) string {
-	if responseTime <= 50 {
-		return badgeColorHexAwesome
-	} else if responseTime <= 200 {
-		return badgeColorHexGreat
-	} else if responseTime <= 300 {
-		return badgeColorHexGood
-	} else if responseTime <= 500 {
-		return badgeColorHexPassable
-	} else if responseTime <= 750 {
-		return badgeColorHexBad
+func getBadgeColorFromResponseTime(responseTime int, key string, cfg *config.Config) string {
+	endpoint := cfg.GetEndpointByKey(key)
+	// the threshold config requires 5 values, so we can be sure it's set here
+	for i := 0; i < 5; i++ {
+		if responseTime <= endpoint.UIConfig.Badge.ResponseTime.Thresholds[i] {
+			return badgeColors[i]
+		}
 	}
 	return badgeColorHexVeryBad
 }

controller/handler/badge_test.go

@@ -7,10 +7,11 @@ import (
 	"testing"
 	"time"
 
-	"github.com/TwiN/gatus/v4/config"
-	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v4/storage/store"
-	"github.com/TwiN/gatus/v4/watchdog"
+	"github.com/TwiN/gatus/v5/config"
+	"github.com/TwiN/gatus/v5/core"
+	"github.com/TwiN/gatus/v5/core/ui"
+	"github.com/TwiN/gatus/v5/storage/store"
+	"github.com/TwiN/gatus/v5/watchdog"
 )
 
 func TestBadge(t *testing.T) {
@@ -29,9 +30,39 @@ func TestBadge(t *testing.T) {
 			},
 		},
 	}
+
+	testSuccessfulResult = core.Result{
+		Hostname:              "example.org",
+		IP:                    "127.0.0.1",
+		HTTPStatus:            200,
+		Errors:                nil,
+		Connected:             true,
+		Success:               true,
+		Timestamp:             timestamp,
+		Duration:              150 * time.Millisecond,
+		CertificateExpiration: 10 * time.Hour,
+		ConditionResults: []*core.ConditionResult{
+			{
+				Condition: "[STATUS] == 200",
+				Success:   true,
+			},
+			{
+				Condition: "[RESPONSE_TIME] < 500",
+				Success:   true,
+			},
+			{
+				Condition: "[CERTIFICATE_EXPIRATION] < 72h",
+				Success:   true,
+			},
+		},
+	}
+
+	cfg.Endpoints[0].UIConfig = ui.GetDefaultConfig()
+	cfg.Endpoints[1].UIConfig = ui.GetDefaultConfig()
+
 	watchdog.UpdateEndpointStatuses(cfg.Endpoints[0], &core.Result{Success: true, Connected: true, Duration: time.Millisecond, Timestamp: time.Now()})
 	watchdog.UpdateEndpointStatuses(cfg.Endpoints[1], &core.Result{Success: false, Connected: false, Duration: time.Second, Timestamp: time.Now()})
-	router := CreateRouter("../../web/static", cfg.Security, nil, cfg.Metrics)
+	router := CreateRouter(cfg)
 	type Scenario struct {
 		Name         string
 		Path         string
@@ -109,6 +140,16 @@ func TestBadge(t *testing.T) {
 			Path:         "/api/v1/endpoints/core_backend/response-times/24h/chart.svg",
 			ExpectedCode: http.StatusOK,
 		},
+		{
+			Name:         "chart-response-time-7d",
+			Path:         "/api/v1/endpoints/core_frontend/response-times/7d/chart.svg",
+			ExpectedCode: http.StatusOK,
+		},
+		{
+			Name:         "chart-response-time-with-invalid-duration",
+			Path:         "/api/v1/endpoints/core_backend/response-times/3d/chart.svg",
+			ExpectedCode: http.StatusBadRequest,
+		},
 	}
 	for _, scenario := range scenarios {
 		t.Run(scenario.Name, func(t *testing.T) {
@@ -181,55 +222,128 @@ func TestGetBadgeColorFromUptime(t *testing.T) {
 }
 
 func TestGetBadgeColorFromResponseTime(t *testing.T) {
+	defer store.Get().Clear()
+	defer cache.Clear()
+
+	var (
+		firstCondition  = core.Condition("[STATUS] == 200")
+		secondCondition = core.Condition("[RESPONSE_TIME] < 500")
+		thirdCondition  = core.Condition("[CERTIFICATE_EXPIRATION] < 72h")
+	)
+
+	firstTestEndpoint := core.Endpoint{
+		Name:                    "a",
+		URL:                     "https://example.org/what/ever",
+		Method:                  "GET",
+		Body:                    "body",
+		Interval:                30 * time.Second,
+		Conditions:              []core.Condition{firstCondition, secondCondition, thirdCondition},
+		Alerts:                  nil,
+		NumberOfFailuresInARow:  0,
+		NumberOfSuccessesInARow: 0,
+		UIConfig:                ui.GetDefaultConfig(),
+	}
+	secondTestEndpoint := core.Endpoint{
+		Name:                    "b",
+		URL:                     "https://example.org/what/ever",
+		Method:                  "GET",
+		Body:                    "body",
+		Interval:                30 * time.Second,
+		Conditions:              []core.Condition{firstCondition, secondCondition, thirdCondition},
+		Alerts:                  nil,
+		NumberOfFailuresInARow:  0,
+		NumberOfSuccessesInARow: 0,
+		UIConfig: &ui.Config{
+			Badge: &ui.Badge{
+				ResponseTime: &ui.ResponseTime{
+					Thresholds: []int{100, 500, 1000, 2000, 3000},
+				},
+			},
+		},
+	}
+	cfg := &config.Config{
+		Metrics:   true,
+		Endpoints: []*core.Endpoint{&firstTestEndpoint, &secondTestEndpoint},
+	}
+
+	store.Get().Insert(&firstTestEndpoint, &testSuccessfulResult)
+	store.Get().Insert(&secondTestEndpoint, &testSuccessfulResult)
+
 	scenarios := []struct {
+		Key           string
 		ResponseTime  int
 		ExpectedColor string
 	}{
 		{
+			Key:           firstTestEndpoint.Key(),
 			ResponseTime:  10,
 			ExpectedColor: badgeColorHexAwesome,
 		},
 		{
+			Key:           firstTestEndpoint.Key(),
 			ResponseTime:  50,
 			ExpectedColor: badgeColorHexAwesome,
 		},
 		{
+			Key:           firstTestEndpoint.Key(),
 			ResponseTime:  75,
 			ExpectedColor: badgeColorHexGreat,
 		},
 		{
+			Key:           firstTestEndpoint.Key(),
 			ResponseTime:  150,
 			ExpectedColor: badgeColorHexGreat,
 		},
 		{
+			Key:           firstTestEndpoint.Key(),
 			ResponseTime:  201,
 			ExpectedColor: badgeColorHexGood,
 		},
 		{
+			Key:           firstTestEndpoint.Key(),
 			ResponseTime:  300,
 			ExpectedColor: badgeColorHexGood,
 		},
 		{
+			Key:           firstTestEndpoint.Key(),
 			ResponseTime:  301,
 			ExpectedColor: badgeColorHexPassable,
 		},
 		{
+			Key:           firstTestEndpoint.Key(),
 			ResponseTime:  450,
 			ExpectedColor: badgeColorHexPassable,
 		},
 		{
+			Key:           firstTestEndpoint.Key(),
 			ResponseTime:  700,
 			ExpectedColor: badgeColorHexBad,
 		},
 		{
+			Key:           firstTestEndpoint.Key(),
 			ResponseTime:  1500,
 			ExpectedColor: badgeColorHexVeryBad,
 		},
+		{
+			Key:           secondTestEndpoint.Key(),
+			ResponseTime:  50,
+			ExpectedColor: badgeColorHexAwesome,
+		},
+		{
+			Key:           secondTestEndpoint.Key(),
+			ResponseTime:  1500,
+			ExpectedColor: badgeColorHexPassable,
+		},
+		{
+			Key:           secondTestEndpoint.Key(),
+			ResponseTime:  2222,
+			ExpectedColor: badgeColorHexBad,
+		},
 	}
 	for _, scenario := range scenarios {
-		t.Run("response-time-"+strconv.Itoa(scenario.ResponseTime), func(t *testing.T) {
-			if getBadgeColorFromResponseTime(scenario.ResponseTime) != scenario.ExpectedColor {
-				t.Errorf("expected %s from %d, got %v", scenario.ExpectedColor, scenario.ResponseTime, getBadgeColorFromResponseTime(scenario.ResponseTime))
+		t.Run(scenario.Key+"-response-time-"+strconv.Itoa(scenario.ResponseTime), func(t *testing.T) {
+			if getBadgeColorFromResponseTime(scenario.ResponseTime, scenario.Key, cfg) != scenario.ExpectedColor {
+				t.Errorf("expected %s from %d, got %v", scenario.ExpectedColor, scenario.ResponseTime, getBadgeColorFromResponseTime(scenario.ResponseTime, scenario.Key, cfg))
 			}
 		})
 	}

controller/handler/chart.go

@@ -7,8 +7,8 @@ import (
 	"sort"
 	"time"
 
-	"github.com/TwiN/gatus/v4/storage/store"
-	"github.com/TwiN/gatus/v4/storage/store/common"
+	"github.com/TwiN/gatus/v5/storage/store"
+	"github.com/TwiN/gatus/v5/storage/store/common"
 	"github.com/gorilla/mux"
 	"github.com/wcharczuk/go-chart/v2"
 	"github.com/wcharczuk/go-chart/v2/drawing"

controller/handler/chart_test.go

@@ -6,10 +6,10 @@ import (
 	"testing"
 	"time"
 
-	"github.com/TwiN/gatus/v4/config"
-	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v4/storage/store"
-	"github.com/TwiN/gatus/v4/watchdog"
+	"github.com/TwiN/gatus/v5/config"
+	"github.com/TwiN/gatus/v5/core"
+	"github.com/TwiN/gatus/v5/storage/store"
+	"github.com/TwiN/gatus/v5/watchdog"
 )
 
 func TestResponseTimeChart(t *testing.T) {
@@ -30,7 +30,7 @@ func TestResponseTimeChart(t *testing.T) {
 	}
 	watchdog.UpdateEndpointStatuses(cfg.Endpoints[0], &core.Result{Success: true, Duration: time.Millisecond, Timestamp: time.Now()})
 	watchdog.UpdateEndpointStatuses(cfg.Endpoints[1], &core.Result{Success: false, Duration: time.Second, Timestamp: time.Now()})
-	router := CreateRouter("../../web/static", cfg.Security, nil, cfg.Metrics)
+	router := CreateRouter(cfg)
 	type Scenario struct {
 		Name         string
 		Path         string

controller/handler/config.go

@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"net/http"
 
-	"github.com/TwiN/gatus/v4/security"
+	"github.com/TwiN/gatus/v5/security"
 )
 
 // ConfigHandler is a handler that returns information for the front end of the application.

controller/handler/config_test.go

@@ -5,7 +5,7 @@ import (
 	"net/http/httptest"
 	"testing"
 
-	"github.com/TwiN/gatus/v4/security"
+	"github.com/TwiN/gatus/v5/security"
 	"github.com/gorilla/mux"
 )
 

controller/handler/endpoint_status.go

@@ -5,14 +5,19 @@ import (
 	"compress/gzip"
 	"encoding/json"
 	"fmt"
+	"io"
 	"log"
 	"net/http"
 	"strings"
 	"time"
 
-	"github.com/TwiN/gatus/v4/storage/store"
-	"github.com/TwiN/gatus/v4/storage/store/common"
-	"github.com/TwiN/gatus/v4/storage/store/common/paging"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config"
+	"github.com/TwiN/gatus/v5/config/remote"
+	"github.com/TwiN/gatus/v5/core"
+	"github.com/TwiN/gatus/v5/storage/store"
+	"github.com/TwiN/gatus/v5/storage/store/common"
+	"github.com/TwiN/gatus/v5/storage/store/common/paging"
 	"github.com/TwiN/gocache/v2"
 	"github.com/gorilla/mux"
 )
@@ -28,48 +33,89 @@ var (
 // EndpointStatuses handles requests to retrieve all EndpointStatus
 // Due to the size of the response, this function leverages a cache.
 // Must not be wrapped by GzipHandler
-func EndpointStatuses(writer http.ResponseWriter, r *http.Request) {
-	page, pageSize := extractPageAndPageSizeFromRequest(r)
-	gzipped := strings.Contains(r.Header.Get("Accept-Encoding"), "gzip")
-	var exists bool
-	var value interface{}
-	if gzipped {
-		writer.Header().Set("Content-Encoding", "gzip")
-		value, exists = cache.Get(fmt.Sprintf("endpoint-status-%d-%d-gzipped", page, pageSize))
-	} else {
-		value, exists = cache.Get(fmt.Sprintf("endpoint-status-%d-%d", page, pageSize))
-	}
-	var data []byte
-	if !exists {
-		var err error
-		buffer := &bytes.Buffer{}
-		gzipWriter := gzip.NewWriter(buffer)
-		endpointStatuses, err := store.Get().GetAllEndpointStatuses(paging.NewEndpointStatusParams().WithResults(page, pageSize))
-		if err != nil {
-			log.Printf("[handler][EndpointStatuses] Failed to retrieve endpoint statuses: %s", err.Error())
-			http.Error(writer, err.Error(), http.StatusInternalServerError)
-			return
-		}
-		data, err = json.Marshal(endpointStatuses)
-		if err != nil {
-			log.Printf("[handler][EndpointStatuses] Unable to marshal object to JSON: %s", err.Error())
-			http.Error(writer, "unable to marshal object to JSON", http.StatusInternalServerError)
-			return
-		}
-		_, _ = gzipWriter.Write(data)
-		_ = gzipWriter.Close()
-		gzippedData := buffer.Bytes()
-		cache.SetWithTTL(fmt.Sprintf("endpoint-status-%d-%d", page, pageSize), data, cacheTTL)
-		cache.SetWithTTL(fmt.Sprintf("endpoint-status-%d-%d-gzipped", page, pageSize), gzippedData, cacheTTL)
+func EndpointStatuses(cfg *config.Config) http.HandlerFunc {
+	return func(writer http.ResponseWriter, r *http.Request) {
+		page, pageSize := extractPageAndPageSizeFromRequest(r)
+		gzipped := strings.Contains(r.Header.Get("Accept-Encoding"), "gzip")
+		var exists bool
+		var value interface{}
 		if gzipped {
-			data = gzippedData
+			writer.Header().Set("Content-Encoding", "gzip")
+			value, exists = cache.Get(fmt.Sprintf("endpoint-status-%d-%d-gzipped", page, pageSize))
+		} else {
+			value, exists = cache.Get(fmt.Sprintf("endpoint-status-%d-%d", page, pageSize))
 		}
-	} else {
-		data = value.([]byte)
+		var data []byte
+		if !exists {
+			var err error
+			buffer := &bytes.Buffer{}
+			gzipWriter := gzip.NewWriter(buffer)
+			endpointStatuses, err := store.Get().GetAllEndpointStatuses(paging.NewEndpointStatusParams().WithResults(page, pageSize))
+			if err != nil {
+				log.Printf("[handler][EndpointStatuses] Failed to retrieve endpoint statuses: %s", err.Error())
+				http.Error(writer, err.Error(), http.StatusInternalServerError)
+				return
+			}
+			// ALPHA: Retrieve endpoint statuses from remote instances
+			if endpointStatusesFromRemote, err := getEndpointStatusesFromRemoteInstances(cfg.Remote); err != nil {
+				log.Printf("[handler][EndpointStatuses] Silently failed to retrieve endpoint statuses from remote: %s", err.Error())
+			} else if endpointStatusesFromRemote != nil {
+				endpointStatuses = append(endpointStatuses, endpointStatusesFromRemote...)
+			}
+			// Marshal endpoint statuses to JSON
+			data, err = json.Marshal(endpointStatuses)
+			if err != nil {
+				log.Printf("[handler][EndpointStatuses] Unable to marshal object to JSON: %s", err.Error())
+				http.Error(writer, "unable to marshal object to JSON", http.StatusInternalServerError)
+				return
+			}
+			_, _ = gzipWriter.Write(data)
+			_ = gzipWriter.Close()
+			gzippedData := buffer.Bytes()
+			cache.SetWithTTL(fmt.Sprintf("endpoint-status-%d-%d", page, pageSize), data, cacheTTL)
+			cache.SetWithTTL(fmt.Sprintf("endpoint-status-%d-%d-gzipped", page, pageSize), gzippedData, cacheTTL)
+			if gzipped {
+				data = gzippedData
+			}
+		} else {
+			data = value.([]byte)
+		}
+		writer.Header().Add("Content-Type", "application/json")
+		writer.WriteHeader(http.StatusOK)
+		_, _ = writer.Write(data)
 	}
-	writer.Header().Add("Content-Type", "application/json")
-	writer.WriteHeader(http.StatusOK)
-	_, _ = writer.Write(data)
+}
+
+func getEndpointStatusesFromRemoteInstances(remoteConfig *remote.Config) ([]*core.EndpointStatus, error) {
+	if remoteConfig == nil || len(remoteConfig.Instances) == 0 {
+		return nil, nil
+	}
+	var endpointStatusesFromAllRemotes []*core.EndpointStatus
+	httpClient := client.GetHTTPClient(remoteConfig.ClientConfig)
+	for _, instance := range remoteConfig.Instances {
+		response, err := httpClient.Get(instance.URL)
+		if err != nil {
+			return nil, err
+		}
+		body, err := io.ReadAll(response.Body)
+		if err != nil {
+			_ = response.Body.Close()
+			log.Printf("[handler][getEndpointStatusesFromRemoteInstances] Silently failed to retrieve endpoint statuses from %s: %s", instance.URL, err.Error())
+			continue
+		}
+		var endpointStatuses []*core.EndpointStatus
+		if err = json.Unmarshal(body, &endpointStatuses); err != nil {
+			_ = response.Body.Close()
+			log.Printf("[handler][getEndpointStatusesFromRemoteInstances] Silently failed to retrieve endpoint statuses from %s: %s", instance.URL, err.Error())
+			continue
+		}
+		_ = response.Body.Close()
+		for _, endpointStatus := range endpointStatuses {
+			endpointStatus.Name = instance.EndpointPrefix + endpointStatus.Name
+		}
+		endpointStatusesFromAllRemotes = append(endpointStatusesFromAllRemotes, endpointStatuses...)
+	}
+	return endpointStatusesFromAllRemotes, nil
 }
 
 // EndpointStatus retrieves a single core.EndpointStatus by group and endpoint name

controller/handler/endpoint_status_test.go

@@ -6,10 +6,10 @@ import (
 	"testing"
 	"time"
 
-	"github.com/TwiN/gatus/v4/config"
-	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v4/storage/store"
-	"github.com/TwiN/gatus/v4/watchdog"
+	"github.com/TwiN/gatus/v5/config"
+	"github.com/TwiN/gatus/v5/core"
+	"github.com/TwiN/gatus/v5/storage/store"
+	"github.com/TwiN/gatus/v5/watchdog"
 )
 
 var (
@@ -97,7 +97,7 @@ func TestEndpointStatus(t *testing.T) {
 	}
 	watchdog.UpdateEndpointStatuses(cfg.Endpoints[0], &core.Result{Success: true, Duration: time.Millisecond, Timestamp: time.Now()})
 	watchdog.UpdateEndpointStatuses(cfg.Endpoints[1], &core.Result{Success: false, Duration: time.Second, Timestamp: time.Now()})
-	router := CreateRouter("../../web/static", cfg.Security, nil, cfg.Metrics)
+	router := CreateRouter(cfg)
 
 	type Scenario struct {
 		Name         string
@@ -153,7 +153,7 @@ func TestEndpointStatuses(t *testing.T) {
 	// Can't be bothered dealing with timezone issues on the worker that runs the automated tests
 	firstResult.Timestamp = time.Time{}
 	secondResult.Timestamp = time.Time{}
-	router := CreateRouter("../../web/static", nil, nil, false)
+	router := CreateRouter(&config.Config{Metrics: true})
 
 	type Scenario struct {
 		Name         string

controller/handler/favicon.go

@@ -1,12 +0,0 @@
-package handler
-
-import (
-	"net/http"
-)
-
-// FavIcon handles requests for /favicon.ico
-func FavIcon(staticFolder string) http.HandlerFunc {
-	return func(writer http.ResponseWriter, request *http.Request) {
-		http.ServeFile(writer, request, staticFolder+"/favicon.ico")
-	}
-}

controller/handler/favicon_test.go

@@ -1,33 +0,0 @@
-package handler
-
-import (
-	"net/http"
-	"net/http/httptest"
-	"testing"
-)
-
-func TestFavIcon(t *testing.T) {
-	router := CreateRouter("../../web/static", nil, nil, false)
-	type Scenario struct {
-		Name         string
-		Path         string
-		ExpectedCode int
-	}
-	scenarios := []Scenario{
-		{
-			Name:         "favicon",
-			Path:         "/favicon.ico",
-			ExpectedCode: http.StatusOK,
-		},
-	}
-	for _, scenario := range scenarios {
-		t.Run(scenario.Name, func(t *testing.T) {
-			request, _ := http.NewRequest("GET", scenario.Path, http.NoBody)
-			responseRecorder := httptest.NewRecorder()
-			router.ServeHTTP(responseRecorder, request)
-			if responseRecorder.Code != scenario.ExpectedCode {
-				t.Errorf("%s %s should have returned %d, but returned %d instead", request.Method, request.URL, scenario.ExpectedCode, responseRecorder.Code)
-			}
-		})
-	}
-}

controller/handler/handler.go

@@ -1,46 +1,50 @@
 package handler
 
 import (
+	"io/fs"
 	"net/http"
 
-	"github.com/TwiN/gatus/v4/config/ui"
-	"github.com/TwiN/gatus/v4/security"
+	"github.com/TwiN/gatus/v5/config"
+	static "github.com/TwiN/gatus/v5/web"
 	"github.com/TwiN/health"
 	"github.com/gorilla/mux"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 )
 
-func CreateRouter(staticFolder string, securityConfig *security.Config, uiConfig *ui.Config, enabledMetrics bool) *mux.Router {
+func CreateRouter(cfg *config.Config) *mux.Router {
 	router := mux.NewRouter()
-	if enabledMetrics {
+	if cfg.Metrics {
 		router.Handle("/metrics", promhttp.Handler()).Methods("GET")
 	}
 	api := router.PathPrefix("/api").Subrouter()
 	protected := api.PathPrefix("/").Subrouter()
 	unprotected := api.PathPrefix("/").Subrouter()
-	if securityConfig != nil {
-		if err := securityConfig.RegisterHandlers(router); err != nil {
+	if cfg.Security != nil {
+		if err := cfg.Security.RegisterHandlers(router); err != nil {
 			panic(err)
 		}
-		if err := securityConfig.ApplySecurityMiddleware(protected); err != nil {
+		if err := cfg.Security.ApplySecurityMiddleware(protected); err != nil {
 			panic(err)
 		}
 	}
 	// Endpoints
-	unprotected.Handle("/v1/config", ConfigHandler{securityConfig: securityConfig}).Methods("GET")
-	protected.HandleFunc("/v1/endpoints/statuses", EndpointStatuses).Methods("GET") // No GzipHandler for this one, because we cache the content as Gzipped already
+	unprotected.Handle("/v1/config", ConfigHandler{securityConfig: cfg.Security}).Methods("GET")
+	protected.HandleFunc("/v1/endpoints/statuses", EndpointStatuses(cfg)).Methods("GET") // No GzipHandler for this one, because we cache the content as Gzipped already
 	protected.HandleFunc("/v1/endpoints/{key}/statuses", GzipHandlerFunc(EndpointStatus)).Methods("GET")
 	unprotected.HandleFunc("/v1/endpoints/{key}/health/badge.svg", HealthBadge).Methods("GET")
 	unprotected.HandleFunc("/v1/endpoints/{key}/uptimes/{duration}/badge.svg", UptimeBadge).Methods("GET")
-	unprotected.HandleFunc("/v1/endpoints/{key}/response-times/{duration}/badge.svg", ResponseTimeBadge).Methods("GET")
+	unprotected.HandleFunc("/v1/endpoints/{key}/response-times/{duration}/badge.svg", ResponseTimeBadge(cfg)).Methods("GET")
 	unprotected.HandleFunc("/v1/endpoints/{key}/response-times/{duration}/chart.svg", ResponseTimeChart).Methods("GET")
 	// Misc
 	router.Handle("/health", health.Handler().WithJSON(true)).Methods("GET")
-	router.HandleFunc("/favicon.ico", FavIcon(staticFolder)).Methods("GET")
 	// SPA
-	router.HandleFunc("/endpoints/{name}", SinglePageApplication(staticFolder, uiConfig)).Methods("GET")
-	router.HandleFunc("/", SinglePageApplication(staticFolder, uiConfig)).Methods("GET")
+	router.HandleFunc("/endpoints/{name}", SinglePageApplication(cfg.UI)).Methods("GET")
+	router.HandleFunc("/", SinglePageApplication(cfg.UI)).Methods("GET")
 	// Everything else falls back on static content
-	router.PathPrefix("/").Handler(GzipHandler(http.FileServer(http.Dir(staticFolder))))
+	staticFileSystem, err := fs.Sub(static.FileSystem, static.RootPath)
+	if err != nil {
+		panic(err)
+	}
+	router.PathPrefix("/").Handler(GzipHandler(http.FileServer(http.FS(staticFileSystem))))
 	return router
 }

controller/handler/handler_test.go

@@ -4,10 +4,12 @@ import (
 	"net/http"
 	"net/http/httptest"
 	"testing"
+
+	"github.com/TwiN/gatus/v5/config"
 )
 
 func TestCreateRouter(t *testing.T) {
-	router := CreateRouter("../../web/static", nil, nil, true)
+	router := CreateRouter(&config.Config{Metrics: true})
 	type Scenario struct {
 		Name         string
 		Path         string
@@ -26,16 +28,32 @@ func TestCreateRouter(t *testing.T) {
 			ExpectedCode: http.StatusOK,
 		},
 		{
-			Name:         "scripts",
+			Name:         "favicon.ico",
+			Path:         "/favicon.ico",
+			ExpectedCode: http.StatusOK,
+		},
+		{
+			Name:         "app.js",
 			Path:         "/js/app.js",
 			ExpectedCode: http.StatusOK,
 		},
 		{
-			Name:         "scripts-gzipped",
+			Name:         "app.js-gzipped",
 			Path:         "/js/app.js",
 			ExpectedCode: http.StatusOK,
 			Gzip:         true,
 		},
+		{
+			Name:         "chunk-vendors.js",
+			Path:         "/js/chunk-vendors.js",
+			ExpectedCode: http.StatusOK,
+		},
+		{
+			Name:         "chunk-vendors.js-gzipped",
+			Path:         "/js/chunk-vendors.js",
+			ExpectedCode: http.StatusOK,
+			Gzip:         true,
+		},
 		{
 			Name:         "index-redirect",
 			Path:         "/index.html",

controller/handler/spa.go

@@ -1,26 +1,30 @@
 package handler
 
 import (
+	_ "embed"
 	"html/template"
 	"log"
 	"net/http"
 
-	"github.com/TwiN/gatus/v4/config/ui"
+	"github.com/TwiN/gatus/v5/config/ui"
+	static "github.com/TwiN/gatus/v5/web"
 )
 
-func SinglePageApplication(staticFolder string, ui *ui.Config) http.HandlerFunc {
+func SinglePageApplication(ui *ui.Config) http.HandlerFunc {
 	return func(writer http.ResponseWriter, request *http.Request) {
-		t, err := template.ParseFiles(staticFolder + "/index.html")
+		t, err := template.ParseFS(static.FileSystem, static.IndexPath)
 		if err != nil {
-			log.Println("[handler][SinglePageApplication] Failed to parse template:", err.Error())
-			http.ServeFile(writer, request, staticFolder+"/index.html")
+			// This should never happen, because ui.ValidateAndSetDefaults validates that the template works.
+			log.Println("[handler][SinglePageApplication] Failed to parse template. This should never happen, because the template is validated on start. Error:", err.Error())
+			http.Error(writer, "Failed to parse template. This should never happen, because the template is validated on start.", http.StatusInternalServerError)
 			return
 		}
 		writer.Header().Set("Content-Type", "text/html")
 		err = t.Execute(writer, ui)
 		if err != nil {
-			log.Println("[handler][SinglePageApplication] Failed to parse template:", err.Error())
-			http.ServeFile(writer, request, staticFolder+"/index.html")
+			// This should never happen, because ui.ValidateAndSetDefaults validates that the template works.
+			log.Println("[handler][SinglePageApplication] Failed to execute template. This should never happen, because the template is validated on start. Error:", err.Error())
+			http.Error(writer, "Failed to execute template. This should never happen, because the template is validated on start.", http.StatusInternalServerError)
 			return
 		}
 	}

controller/handler/spa_test.go

@@ -6,10 +6,10 @@ import (
 	"testing"
 	"time"
 
-	"github.com/TwiN/gatus/v4/config"
-	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v4/storage/store"
-	"github.com/TwiN/gatus/v4/watchdog"
+	"github.com/TwiN/gatus/v5/config"
+	"github.com/TwiN/gatus/v5/core"
+	"github.com/TwiN/gatus/v5/storage/store"
+	"github.com/TwiN/gatus/v5/watchdog"
 )
 
 func TestSinglePageApplication(t *testing.T) {
@@ -30,7 +30,7 @@ func TestSinglePageApplication(t *testing.T) {
 	}
 	watchdog.UpdateEndpointStatuses(cfg.Endpoints[0], &core.Result{Success: true, Duration: time.Millisecond, Timestamp: time.Now()})
 	watchdog.UpdateEndpointStatuses(cfg.Endpoints[1], &core.Result{Success: false, Duration: time.Second, Timestamp: time.Now()})
-	router := CreateRouter("../../web/static", cfg.Security, nil, cfg.Metrics)
+	router := CreateRouter(cfg)
 	type Scenario struct {
 		Name         string
 		Path         string

controller/handler/util.go

@@ -4,7 +4,7 @@ import (
 	"net/http"
 	"strconv"
 
-	"github.com/TwiN/gatus/v4/storage/store/common"
+	"github.com/TwiN/gatus/v5/storage/store/common"
 )
 
 const (

core/condition.go

@@ -1,13 +1,14 @@
 package core
 
 import (
+	"errors"
 	"fmt"
 	"strconv"
 	"strings"
 	"time"
 
-	"github.com/TwiN/gatus/v4/jsonpath"
-	"github.com/TwiN/gatus/v4/pattern"
+	"github.com/TwiN/gatus/v5/jsonpath"
+	"github.com/TwiN/gatus/v5/pattern"
 )
 
 const (
@@ -21,7 +22,7 @@ const (
 	// Values that could replace the placeholder: 127.0.0.1, 10.0.0.1, ...
 	IPPlaceholder = "[IP]"
 
-	// DNSRCodePlaceholder is a place holder for DNS_RCODE
+	// DNSRCodePlaceholder is a placeholder for DNS_RCODE
 	//
 	// Values that could replace the placeholder: NOERROR, FORMERR, SERVFAIL, NXDOMAIN, NOTIMP, REFUSED
 	DNSRCodePlaceholder = "[DNS_RCODE]"
@@ -46,6 +47,9 @@ const (
 	// Values that could replace the placeholder: 4461677039 (~52 days)
 	CertificateExpirationPlaceholder = "[CERTIFICATE_EXPIRATION]"
 
+	// DomainExpirationPlaceholder is a placeholder for the duration before the domain expires, in milliseconds.
+	DomainExpirationPlaceholder = "[DOMAIN_EXPIRATION]"
+
 	// LengthFunctionPrefix is the prefix for the length function
 	//
 	// Usage: len([BODY].articles) == 10, len([BODY].name) > 5
@@ -83,50 +87,59 @@ const (
 // Condition is a condition that needs to be met in order for an Endpoint to be considered healthy.
 type Condition string
 
+// Validate checks if the Condition is valid
+func (c Condition) Validate() error {
+	r := &Result{}
+	c.evaluate(r, false)
+	if len(r.Errors) != 0 {
+		return errors.New(r.Errors[0])
+	}
+	return nil
+}
+
 // evaluate the Condition with the Result of the health check
-// TODO: Add a mandatory space between each operators (e.g. " == " instead of "==") (BREAKING CHANGE)
 func (c Condition) evaluate(result *Result, dontResolveFailedConditions bool) bool {
 	condition := string(c)
 	success := false
 	conditionToDisplay := condition
-	if strings.Contains(condition, "==") {
-		parameters, resolvedParameters := sanitizeAndResolve(strings.Split(condition, "=="), result)
+	if strings.Contains(condition, " == ") {
+		parameters, resolvedParameters := sanitizeAndResolve(strings.Split(condition, " == "), result)
 		success = isEqual(resolvedParameters[0], resolvedParameters[1])
 		if !success && !dontResolveFailedConditions {
 			conditionToDisplay = prettify(parameters, resolvedParameters, "==")
 		}
-	} else if strings.Contains(condition, "!=") {
-		parameters, resolvedParameters := sanitizeAndResolve(strings.Split(condition, "!="), result)
+	} else if strings.Contains(condition, " != ") {
+		parameters, resolvedParameters := sanitizeAndResolve(strings.Split(condition, " != "), result)
 		success = !isEqual(resolvedParameters[0], resolvedParameters[1])
 		if !success && !dontResolveFailedConditions {
 			conditionToDisplay = prettify(parameters, resolvedParameters, "!=")
 		}
-	} else if strings.Contains(condition, "<=") {
-		parameters, resolvedParameters := sanitizeAndResolveNumerical(strings.Split(condition, "<="), result)
+	} else if strings.Contains(condition, " <= ") {
+		parameters, resolvedParameters := sanitizeAndResolveNumerical(strings.Split(condition, " <= "), result)
 		success = resolvedParameters[0] <= resolvedParameters[1]
 		if !success && !dontResolveFailedConditions {
 			conditionToDisplay = prettifyNumericalParameters(parameters, resolvedParameters, "<=")
 		}
-	} else if strings.Contains(condition, ">=") {
-		parameters, resolvedParameters := sanitizeAndResolveNumerical(strings.Split(condition, ">="), result)
+	} else if strings.Contains(condition, " >= ") {
+		parameters, resolvedParameters := sanitizeAndResolveNumerical(strings.Split(condition, " >= "), result)
 		success = resolvedParameters[0] >= resolvedParameters[1]
 		if !success && !dontResolveFailedConditions {
 			conditionToDisplay = prettifyNumericalParameters(parameters, resolvedParameters, ">=")
 		}
-	} else if strings.Contains(condition, ">") {
-		parameters, resolvedParameters := sanitizeAndResolveNumerical(strings.Split(condition, ">"), result)
+	} else if strings.Contains(condition, " > ") {
+		parameters, resolvedParameters := sanitizeAndResolveNumerical(strings.Split(condition, " > "), result)
 		success = resolvedParameters[0] > resolvedParameters[1]
 		if !success && !dontResolveFailedConditions {
 			conditionToDisplay = prettifyNumericalParameters(parameters, resolvedParameters, ">")
 		}
-	} else if strings.Contains(condition, "<") {
-		parameters, resolvedParameters := sanitizeAndResolveNumerical(strings.Split(condition, "<"), result)
+	} else if strings.Contains(condition, " < ") {
+		parameters, resolvedParameters := sanitizeAndResolveNumerical(strings.Split(condition, " < "), result)
 		success = resolvedParameters[0] < resolvedParameters[1]
 		if !success && !dontResolveFailedConditions {
 			conditionToDisplay = prettifyNumericalParameters(parameters, resolvedParameters, "<")
 		}
 	} else {
-		result.AddError(fmt.Sprintf("invalid condition '%s' has been provided", condition))
+		result.AddError(fmt.Sprintf("invalid condition: %s", condition))
 		return false
 	}
 	if !success {
@@ -142,9 +155,21 @@ func (c Condition) hasBodyPlaceholder() bool {
 	return strings.Contains(string(c), BodyPlaceholder)
 }
 
+// hasDomainExpirationPlaceholder checks whether the condition has a DomainExpirationPlaceholder
+// Used for determining whether a whois operation is necessary
+func (c Condition) hasDomainExpirationPlaceholder() bool {
+	return strings.Contains(string(c), DomainExpirationPlaceholder)
+}
+
+// hasIPPlaceholder checks whether the condition has an IPPlaceholder
+// Used for determining whether an IP lookup is necessary
+func (c Condition) hasIPPlaceholder() bool {
+	return strings.Contains(string(c), IPPlaceholder)
+}
+
 // isEqual compares two strings.
 //
-// Supports the pattern and the any functions.
+// Supports the "pat" and the "any" functions.
 // i.e. if one of the parameters starts with PatternFunctionPrefix and ends with FunctionSuffix, it will be treated like
 // a pattern.
 func isEqual(first, second string) bool {
@@ -219,6 +244,8 @@ func sanitizeAndResolve(elements []string, result *Result) ([]string, []string)
 			element = strconv.FormatBool(result.Connected)
 		case CertificateExpirationPlaceholder:
 			element = strconv.FormatInt(result.CertificateExpiration.Milliseconds(), 10)
+		case DomainExpirationPlaceholder:
+			element = strconv.FormatInt(result.DomainExpiration.Milliseconds(), 10)
 		default:
 			// if contains the BodyPlaceholder, then evaluate json path
 			if strings.Contains(element, BodyPlaceholder) {

core/condition_test.go

@@ -1,11 +1,59 @@
 package core
 
 import (
+	"errors"
+	"fmt"
 	"strconv"
 	"testing"
 	"time"
 )
 
+func TestCondition_Validate(t *testing.T) {
+	scenarios := []struct {
+		condition   Condition
+		expectedErr error
+	}{
+		{condition: "[STATUS] == 200", expectedErr: nil},
+		{condition: "[STATUS] != 200", expectedErr: nil},
+		{condition: "[STATUS] <= 200", expectedErr: nil},
+		{condition: "[STATUS] >= 200", expectedErr: nil},
+		{condition: "[STATUS] < 200", expectedErr: nil},
+		{condition: "[STATUS] > 200", expectedErr: nil},
+		{condition: "[STATUS] == any(200, 201, 202, 203)", expectedErr: nil},
+		{condition: "[STATUS] == [BODY].status", expectedErr: nil},
+		{condition: "[CONNECTED] == true", expectedErr: nil},
+		{condition: "[RESPONSE_TIME] < 500", expectedErr: nil},
+		{condition: "[IP] == 127.0.0.1", expectedErr: nil},
+		{condition: "[BODY] == 1", expectedErr: nil},
+		{condition: "[BODY].test == wat", expectedErr: nil},
+		{condition: "[BODY].test.wat == wat", expectedErr: nil},
+		{condition: "[BODY].age == [BODY].id", expectedErr: nil},
+		{condition: "[BODY].users[0].id == 1", expectedErr: nil},
+		{condition: "len([BODY].users) == 100", expectedErr: nil},
+		{condition: "len([BODY].data) < 5", expectedErr: nil},
+		{condition: "has([BODY].errors) == false", expectedErr: nil},
+		{condition: "has([BODY].users[0].name) == true", expectedErr: nil},
+		{condition: "[BODY].name == pat(john*)", expectedErr: nil},
+		{condition: "[CERTIFICATE_EXPIRATION] > 48h", expectedErr: nil},
+		{condition: "[DOMAIN_EXPIRATION] > 720h", expectedErr: nil},
+		{condition: "raw == raw", expectedErr: nil},
+		{condition: "[STATUS] ? 201", expectedErr: errors.New("invalid condition: [STATUS] ? 201")},
+		{condition: "[STATUS]==201", expectedErr: errors.New("invalid condition: [STATUS]==201")},
+		{condition: "[STATUS] = = 201", expectedErr: errors.New("invalid condition: [STATUS] = = 201")},
+		{condition: "[STATUS] ==", expectedErr: errors.New("invalid condition: [STATUS] ==")},
+		{condition: "[STATUS]", expectedErr: errors.New("invalid condition: [STATUS]")},
+		// FIXME: Should return an error, but doesn't because jsonpath isn't evaluated due to body being empty in Condition.Validate()
+		//{condition: "len([BODY].users == 100", expectedErr: nil},
+	}
+	for _, scenario := range scenarios {
+		t.Run(string(scenario.condition), func(t *testing.T) {
+			if err := scenario.condition.Validate(); fmt.Sprint(err) != fmt.Sprint(scenario.expectedErr) {
+				t.Errorf("expected err %v, got %v", scenario.expectedErr, err)
+			}
+		})
+	}
+}
+
 func TestCondition_evaluate(t *testing.T) {
 	scenarios := []struct {
 		Name                        string
@@ -155,13 +203,6 @@ func TestCondition_evaluate(t *testing.T) {
 			ExpectedSuccess: false,
 			ExpectedOutput:  "[BODY].data.name (INVALID) == john",
 		},
-		{
-			Name:            "body-jsonpath-complex-len",
-			Condition:       Condition("len([BODY].data.name) == 4"),
-			Result:          &Result{body: []byte("{\"data\": {\"name\": \"john\"}}")},
-			ExpectedSuccess: true,
-			ExpectedOutput:  "len([BODY].data.name) == 4",
-		},
 		{
 			Name:            "body-jsonpath-complex-len-invalid",
 			Condition:       Condition("len([BODY].data.name) == john"),
@@ -232,154 +273,6 @@ func TestCondition_evaluate(t *testing.T) {
 			ExpectedSuccess: false,
 			ExpectedOutput:  "[BODY].data.id (10) < 5",
 		},
-		{
-			Name:            "body-len-array",
-			Condition:       Condition("len([BODY].data) == 3"),
-			Result:          &Result{body: []byte("{\"data\": [{\"id\": 1}, {\"id\": 2}, {\"id\": 3}]}")},
-			ExpectedSuccess: true,
-			ExpectedOutput:  "len([BODY].data) == 3",
-		},
-		{
-			Name:            "body-len-array-invalid",
-			Condition:       Condition("len([BODY].data) == 8"),
-			Result:          &Result{body: []byte("{\"name\": \"john.doe\"}")},
-			ExpectedSuccess: false,
-			ExpectedOutput:  "len([BODY].data) (INVALID) == 8",
-		},
-		{
-			Name:            "body-len-string",
-			Condition:       Condition("len([BODY].name) == 8"),
-			Result:          &Result{body: []byte("{\"name\": \"john.doe\"}")},
-			ExpectedSuccess: true,
-			ExpectedOutput:  "len([BODY].name) == 8",
-		},
-		{
-			Name:            "body-pattern",
-			Condition:       Condition("[BODY] == pat(*john*)"),
-			Result:          &Result{body: []byte("{\"name\": \"john.doe\"}")},
-			ExpectedSuccess: true,
-			ExpectedOutput:  "[BODY] == pat(*john*)",
-		},
-		{
-			Name:            "body-pattern-2",
-			Condition:       Condition("[BODY].name == pat(john*)"),
-			Result:          &Result{body: []byte("{\"name\": \"john.doe\"}")},
-			ExpectedSuccess: true,
-			ExpectedOutput:  "[BODY].name == pat(john*)",
-		},
-		{
-			Name:            "body-pattern-failure",
-			Condition:       Condition("[BODY].name == pat(bob*)"),
-			Result:          &Result{body: []byte("{\"name\": \"john.doe\"}")},
-			ExpectedSuccess: false,
-			ExpectedOutput:  "[BODY].name (john.doe) == pat(bob*)",
-		},
-		{
-			Name:            "body-pattern-html",
-			Condition:       Condition("[BODY] == pat(*<div id=\"user\">john.doe</div>*)"),
-			Result:          &Result{body: []byte(`<!DOCTYPE html><html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /></head><body><div id="user">john.doe</div></body></html>`)},
-			ExpectedSuccess: true,
-			ExpectedOutput:  "[BODY] == pat(*<div id=\"user\">john.doe</div>*)",
-		},
-		{
-			Name:            "body-pattern-html-failure",
-			Condition:       Condition("[BODY] == pat(*<div id=\"user\">john.doe</div>*)"),
-			Result:          &Result{body: []byte(`<!DOCTYPE html><html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /></head><body><div id="user">jane.doe</div></body></html>`)},
-			ExpectedSuccess: false,
-			ExpectedOutput:  "[BODY] (<!DOCTYPE html><html lang...(truncated)) == pat(*<div id=\"user\">john.doe</div>*)",
-		},
-		{
-			Name:            "body-pattern-html-failure-alt",
-			Condition:       Condition("pat(*<div id=\"user\">john.doe</div>*) == [BODY]"),
-			Result:          &Result{body: []byte(`<!DOCTYPE html><html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /></head><body><div id="user">jane.doe</div></body></html>`)},
-			ExpectedSuccess: false,
-			ExpectedOutput:  "pat(*<div id=\"user\">john.doe</div>*) == [BODY] (<!DOCTYPE html><html lang...(truncated))",
-		},
-		{
-			Name:            "ip-pattern",
-			Condition:       Condition("[IP] == pat(10.*)"),
-			Result:          &Result{IP: "10.0.0.0"},
-			ExpectedSuccess: true,
-			ExpectedOutput:  "[IP] == pat(10.*)",
-		},
-		{
-			Name:            "ip-pattern-failure",
-			Condition:       Condition("[IP] == pat(10.*)"),
-			Result:          &Result{IP: "255.255.255.255"},
-			ExpectedSuccess: false,
-			ExpectedOutput:  "[IP] (255.255.255.255) == pat(10.*)",
-		},
-		{
-			Name:            "status-pattern",
-			Condition:       Condition("[STATUS] == pat(4*)"),
-			Result:          &Result{HTTPStatus: 404},
-			ExpectedSuccess: true,
-			ExpectedOutput:  "[STATUS] == pat(4*)",
-		},
-		{
-			Name:            "status-pattern-failure",
-			Condition:       Condition("[STATUS] == pat(4*)"),
-			Result:          &Result{HTTPStatus: 200},
-			ExpectedSuccess: false,
-			ExpectedOutput:  "[STATUS] (200) == pat(4*)",
-		},
-		{
-			Name:            "body-any",
-			Condition:       Condition("[BODY].name == any(john.doe, jane.doe)"),
-			Result:          &Result{body: []byte("{\"name\": \"john.doe\"}")},
-			ExpectedSuccess: true,
-			ExpectedOutput:  "[BODY].name == any(john.doe, jane.doe)",
-		},
-		{
-			Name:            "body-any-2",
-			Condition:       Condition("[BODY].name == any(john.doe, jane.doe)"),
-			Result:          &Result{body: []byte("{\"name\": \"jane.doe\"}")},
-			ExpectedSuccess: true,
-			ExpectedOutput:  "[BODY].name == any(john.doe, jane.doe)",
-		},
-		{
-			Name:            "body-any-failure",
-			Condition:       Condition("[BODY].name == any(john.doe, jane.doe)"),
-			Result:          &Result{body: []byte("{\"name\": \"bob\"}")},
-			ExpectedSuccess: false,
-			ExpectedOutput:  "[BODY].name (bob) == any(john.doe, jane.doe)",
-		},
-		{
-			Name:            "status-any",
-			Condition:       Condition("[STATUS] == any(200, 429)"),
-			Result:          &Result{HTTPStatus: 200},
-			ExpectedSuccess: true,
-			ExpectedOutput:  "[STATUS] == any(200, 429)",
-		},
-		{
-			Name:            "status-any-2",
-			Condition:       Condition("[STATUS] == any(200, 429)"),
-			Result:          &Result{HTTPStatus: 429},
-			ExpectedSuccess: true,
-			ExpectedOutput:  "[STATUS] == any(200, 429)",
-		},
-		{
-			Name:            "status-any-reverse",
-			Condition:       Condition("any(200, 429) == [STATUS]"),
-			Result:          &Result{HTTPStatus: 429},
-			ExpectedSuccess: true,
-			ExpectedOutput:  "any(200, 429) == [STATUS]",
-		},
-		{
-			Name:            "status-any-failure",
-			Condition:       Condition("[STATUS] == any(200, 429)"),
-			Result:          &Result{HTTPStatus: 404},
-			ExpectedSuccess: false,
-			ExpectedOutput:  "[STATUS] (404) == any(200, 429)",
-		},
-		{
-			Name:                        "status-any-failure-but-dont-resolve",
-			Condition:                   Condition("[STATUS] == any(200, 429)"),
-			Result:                      &Result{HTTPStatus: 404},
-			DontResolveFailedConditions: true,
-			ExpectedSuccess:             false,
-			ExpectedOutput:              "[STATUS] == any(200, 429)",
-		},
 		{
 			Name:            "connected",
 			Condition:       Condition("[CONNECTED] == true"),
@@ -429,6 +322,238 @@ func TestCondition_evaluate(t *testing.T) {
 			ExpectedSuccess: false,
 			ExpectedOutput:  "[CERTIFICATE_EXPIRATION] (86400000) > 48h (172800000)",
 		},
+		{
+			Name:            "no-placeholders",
+			Condition:       Condition("1 == 2"),
+			Result:          &Result{},
+			ExpectedSuccess: false,
+			ExpectedOutput:  "1 == 2",
+		},
+		///////////////
+		// Functions //
+		///////////////
+		// len
+		{
+			Name:            "len-body-jsonpath-complex",
+			Condition:       Condition("len([BODY].data.name) == 4"),
+			Result:          &Result{body: []byte("{\"data\": {\"name\": \"john\"}}")},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "len([BODY].data.name) == 4",
+		},
+		{
+			Name:            "len-body-array",
+			Condition:       Condition("len([BODY]) == 3"),
+			Result:          &Result{body: []byte("[{\"id\": 1}, {\"id\": 2}, {\"id\": 3}]")},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "len([BODY]) == 3",
+		},
+		{
+			Name:            "len-body-keyed-array",
+			Condition:       Condition("len([BODY].data) == 3"),
+			Result:          &Result{body: []byte("{\"data\": [{\"id\": 1}, {\"id\": 2}, {\"id\": 3}]}")},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "len([BODY].data) == 3",
+		},
+		{
+			Name:            "len-body-array-invalid",
+			Condition:       Condition("len([BODY].data) == 8"),
+			Result:          &Result{body: []byte("{\"name\": \"john.doe\"}")},
+			ExpectedSuccess: false,
+			ExpectedOutput:  "len([BODY].data) (INVALID) == 8",
+		},
+		{
+			Name:            "len-body-string",
+			Condition:       Condition("len([BODY]) == 8"),
+			Result:          &Result{body: []byte("john.doe")},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "len([BODY]) == 8",
+		},
+		{
+			Name:            "len-body-keyed-string",
+			Condition:       Condition("len([BODY].name) == 8"),
+			Result:          &Result{body: []byte("{\"name\": \"john.doe\"}")},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "len([BODY].name) == 8",
+		},
+		{
+			Name:            "len-body-keyed-int",
+			Condition:       Condition("len([BODY].age) == 2"),
+			Result:          &Result{body: []byte(`{"age":18}`)},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "len([BODY].age) == 2",
+		},
+		{
+			Name:            "len-body-keyed-bool",
+			Condition:       Condition("len([BODY].adult) == 4"),
+			Result:          &Result{body: []byte(`{"adult":true}`)},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "len([BODY].adult) == 4",
+		},
+		{
+			Name:            "len-body-object-inside-array",
+			Condition:       Condition("len([BODY][0]) == 23"),
+			Result:          &Result{body: []byte(`[{"age":18,"adult":true}]`)},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "len([BODY][0]) == 23",
+		},
+		{
+			Name:            "len-body-object-keyed-int-inside-array",
+			Condition:       Condition("len([BODY][0].age) == 2"),
+			Result:          &Result{body: []byte(`[{"age":18,"adult":true}]`)},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "len([BODY][0].age) == 2",
+		},
+		{
+			Name:            "len-body-keyed-bool-inside-array",
+			Condition:       Condition("len([BODY][0].adult) == 4"),
+			Result:          &Result{body: []byte(`[{"age":18,"adult":true}]`)},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "len([BODY][0].adult) == 4",
+		},
+		{
+			Name:            "len-body-object",
+			Condition:       Condition("len([BODY]) == 20"),
+			Result:          &Result{body: []byte("{\"name\": \"john.doe\"}")},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "len([BODY]) == 20",
+		},
+		// pat
+		{
+			Name:            "pat-body-1",
+			Condition:       Condition("[BODY] == pat(*john*)"),
+			Result:          &Result{body: []byte("{\"name\": \"john.doe\"}")},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "[BODY] == pat(*john*)",
+		},
+		{
+			Name:            "pat-body-2",
+			Condition:       Condition("[BODY].name == pat(john*)"),
+			Result:          &Result{body: []byte("{\"name\": \"john.doe\"}")},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "[BODY].name == pat(john*)",
+		},
+		{
+			Name:            "pat-body-failure",
+			Condition:       Condition("[BODY].name == pat(bob*)"),
+			Result:          &Result{body: []byte("{\"name\": \"john.doe\"}")},
+			ExpectedSuccess: false,
+			ExpectedOutput:  "[BODY].name (john.doe) == pat(bob*)",
+		},
+		{
+			Name:            "pat-body-html",
+			Condition:       Condition("[BODY] == pat(*<div id=\"user\">john.doe</div>*)"),
+			Result:          &Result{body: []byte(`<!DOCTYPE html><html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /></head><body><div id="user">john.doe</div></body></html>`)},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "[BODY] == pat(*<div id=\"user\">john.doe</div>*)",
+		},
+		{
+			Name:            "pat-body-html-failure",
+			Condition:       Condition("[BODY] == pat(*<div id=\"user\">john.doe</div>*)"),
+			Result:          &Result{body: []byte(`<!DOCTYPE html><html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /></head><body><div id="user">jane.doe</div></body></html>`)},
+			ExpectedSuccess: false,
+			ExpectedOutput:  "[BODY] (<!DOCTYPE html><html lang...(truncated)) == pat(*<div id=\"user\">john.doe</div>*)",
+		},
+		{
+			Name:            "pat-body-html-failure-alt",
+			Condition:       Condition("pat(*<div id=\"user\">john.doe</div>*) == [BODY]"),
+			Result:          &Result{body: []byte(`<!DOCTYPE html><html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /></head><body><div id="user">jane.doe</div></body></html>`)},
+			ExpectedSuccess: false,
+			ExpectedOutput:  "pat(*<div id=\"user\">john.doe</div>*) == [BODY] (<!DOCTYPE html><html lang...(truncated))",
+		},
+		{
+			Name:            "pat-body-in-array",
+			Condition:       Condition("[BODY].data == pat(*Whatever*)"),
+			Result:          &Result{body: []byte("{\"data\": [\"hello\", \"world\", \"Whatever\"]}")},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "[BODY].data == pat(*Whatever*)",
+		},
+		{
+			Name:            "pat-ip",
+			Condition:       Condition("[IP] == pat(10.*)"),
+			Result:          &Result{IP: "10.0.0.0"},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "[IP] == pat(10.*)",
+		},
+		{
+			Name:            "pat-ip-failure",
+			Condition:       Condition("[IP] == pat(10.*)"),
+			Result:          &Result{IP: "255.255.255.255"},
+			ExpectedSuccess: false,
+			ExpectedOutput:  "[IP] (255.255.255.255) == pat(10.*)",
+		},
+		{
+			Name:            "pat-status",
+			Condition:       Condition("[STATUS] == pat(4*)"),
+			Result:          &Result{HTTPStatus: 404},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "[STATUS] == pat(4*)",
+		},
+		{
+			Name:            "pat-status-failure",
+			Condition:       Condition("[STATUS] == pat(4*)"),
+			Result:          &Result{HTTPStatus: 200},
+			ExpectedSuccess: false,
+			ExpectedOutput:  "[STATUS] (200) == pat(4*)",
+		},
+		// any
+		{
+			Name:            "any-body-1",
+			Condition:       Condition("[BODY].name == any(john.doe, jane.doe)"),
+			Result:          &Result{body: []byte("{\"name\": \"john.doe\"}")},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "[BODY].name == any(john.doe, jane.doe)",
+		},
+		{
+			Name:            "any-body-2",
+			Condition:       Condition("[BODY].name == any(john.doe, jane.doe)"),
+			Result:          &Result{body: []byte("{\"name\": \"jane.doe\"}")},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "[BODY].name == any(john.doe, jane.doe)",
+		},
+		{
+			Name:            "any-body-failure",
+			Condition:       Condition("[BODY].name == any(john.doe, jane.doe)"),
+			Result:          &Result{body: []byte("{\"name\": \"bob\"}")},
+			ExpectedSuccess: false,
+			ExpectedOutput:  "[BODY].name (bob) == any(john.doe, jane.doe)",
+		},
+		{
+			Name:            "any-status-1",
+			Condition:       Condition("[STATUS] == any(200, 429)"),
+			Result:          &Result{HTTPStatus: 200},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "[STATUS] == any(200, 429)",
+		},
+		{
+			Name:            "any-status-2",
+			Condition:       Condition("[STATUS] == any(200, 429)"),
+			Result:          &Result{HTTPStatus: 429},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "[STATUS] == any(200, 429)",
+		},
+		{
+			Name:            "any-status-reverse",
+			Condition:       Condition("any(200, 429) == [STATUS]"),
+			Result:          &Result{HTTPStatus: 429},
+			ExpectedSuccess: true,
+			ExpectedOutput:  "any(200, 429) == [STATUS]",
+		},
+		{
+			Name:            "any-status-failure",
+			Condition:       Condition("[STATUS] == any(200, 429)"),
+			Result:          &Result{HTTPStatus: 404},
+			ExpectedSuccess: false,
+			ExpectedOutput:  "[STATUS] (404) == any(200, 429)",
+		},
+		{
+			Name:                        "any-status-failure-but-dont-resolve",
+			Condition:                   Condition("[STATUS] == any(200, 429)"),
+			Result:                      &Result{HTTPStatus: 404},
+			DontResolveFailedConditions: true,
+			ExpectedSuccess:             false,
+			ExpectedOutput:              "[STATUS] == any(200, 429)",
+		},
+		// has
 		{
 			Name:            "has",
 			Condition:       Condition("has([BODY].errors) == false"),
@@ -451,13 +576,6 @@ func TestCondition_evaluate(t *testing.T) {
 			ExpectedSuccess:             false,
 			ExpectedOutput:              "has([BODY].errors) == false",
 		},
-		{
-			Name:            "no-placeholders",
-			Condition:       Condition("1 == 2"),
-			Result:          &Result{},
-			ExpectedSuccess: false,
-			ExpectedOutput:  "1 == 2",
-		},
 	}
 	for _, scenario := range scenarios {
 		t.Run(scenario.Name, func(t *testing.T) {

core/dns_test.go

@@ -4,7 +4,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/TwiN/gatus/v4/pattern"
+	"github.com/TwiN/gatus/v5/pattern"
 )
 
 func TestIntegrationQuery(t *testing.T) {
@@ -22,7 +22,7 @@ func TestIntegrationQuery(t *testing.T) {
 				QueryType: "A",
 				QueryName: "example.com.",
 			},
-			inputURL:        "1.1.1.1",
+			inputURL:        "8.8.8.8",
 			expectedDNSCode: "NOERROR",
 			expectedBody:    "93.184.216.34",
 		},
@@ -32,7 +32,7 @@ func TestIntegrationQuery(t *testing.T) {
 				QueryType: "AAAA",
 				QueryName: "example.com.",
 			},
-			inputURL:        "1.1.1.1",
+			inputURL:        "8.8.8.8",
 			expectedDNSCode: "NOERROR",
 			expectedBody:    "2606:2800:220:1:248:1893:25c8:1946",
 		},
@@ -42,7 +42,7 @@ func TestIntegrationQuery(t *testing.T) {
 				QueryType: "CNAME",
 				QueryName: "en.wikipedia.org.",
 			},
-			inputURL:        "1.1.1.1",
+			inputURL:        "8.8.8.8",
 			expectedDNSCode: "NOERROR",
 			expectedBody:    "dyna.wikimedia.org.",
 		},
@@ -52,7 +52,7 @@ func TestIntegrationQuery(t *testing.T) {
 				QueryType: "MX",
 				QueryName: "example.com.",
 			},
-			inputURL:        "1.1.1.1",
+			inputURL:        "8.8.8.8",
 			expectedDNSCode: "NOERROR",
 			expectedBody:    ".",
 		},
@@ -62,7 +62,7 @@ func TestIntegrationQuery(t *testing.T) {
 				QueryType: "NS",
 				QueryName: "example.com.",
 			},
-			inputURL:        "1.1.1.1",
+			inputURL:        "8.8.8.8",
 			expectedDNSCode: "NOERROR",
 			expectedBody:    "*.iana-servers.net.",
 		},
@@ -72,7 +72,7 @@ func TestIntegrationQuery(t *testing.T) {
 				QueryType: "B",
 				QueryName: "example",
 			},
-			inputURL:      "1.1.1.1",
+			inputURL:      "8.8.8.8",
 			isErrExpected: true,
 		},
 	}

core/endpoint.go

@@ -5,6 +5,7 @@ import (
 	"crypto/x509"
 	"encoding/json"
 	"errors"
+	"fmt"
 	"io"
 	"net"
 	"net/http"
@@ -12,10 +13,10 @@ import (
 	"strings"
 	"time"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core/ui"
-	"github.com/TwiN/gatus/v4/util"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core/ui"
+	"github.com/TwiN/gatus/v5/util"
 )
 
 type EndpointType string
@@ -33,13 +34,15 @@ const (
 	// GatusUserAgent is the default user agent that Gatus uses to send requests.
 	GatusUserAgent = "Gatus/1.0"
 
-	// EndpointType enum for the endpoint type.
 	EndpointTypeDNS      EndpointType = "DNS"
 	EndpointTypeTCP      EndpointType = "TCP"
+	EndpointTypeSCTP     EndpointType = "SCTP"
+	EndpointTypeUDP      EndpointType = "UDP"
 	EndpointTypeICMP     EndpointType = "ICMP"
 	EndpointTypeSTARTTLS EndpointType = "STARTTLS"
 	EndpointTypeTLS      EndpointType = "TLS"
 	EndpointTypeHTTP     EndpointType = "HTTP"
+	EndpointTypeUNKNOWN  EndpointType = "UNKNOWN"
 )
 
 var (
@@ -54,6 +57,18 @@ var (
 
 	// ErrEndpointWithInvalidNameOrGroup is the error with which Gatus will panic if an endpoint has an invalid character where it shouldn't
 	ErrEndpointWithInvalidNameOrGroup = errors.New("endpoint name and group must not have \" or \\")
+
+	// ErrUnknownEndpointType is the error with which Gatus will panic if an endpoint has an unknown type
+	ErrUnknownEndpointType = errors.New("unknown endpoint type")
+
+	// ErrInvalidConditionFormat is the error with which Gatus will panic if a condition has an invalid format
+	ErrInvalidConditionFormat = errors.New("invalid condition format: does not match '<VALUE> <COMPARATOR> <VALUE>'")
+
+	// ErrInvalidEndpointIntervalForDomainExpirationPlaceholder is the error with which Gatus will panic if an endpoint
+	// has both an interval smaller than 5 minutes and a condition with DomainExpirationPlaceholder.
+	// This is because the free whois service we are using should not be abused, especially considering the fact that
+	// the data takes a while to be updated.
+	ErrInvalidEndpointIntervalForDomainExpirationPlaceholder = errors.New("the minimum interval for an endpoint with a condition using the " + DomainExpirationPlaceholder + " placeholder is 300s (5m)")
 )
 
 // Endpoint is the configuration of a monitored
@@ -122,18 +137,24 @@ func (endpoint Endpoint) Type() EndpointType {
 		return EndpointTypeDNS
 	case strings.HasPrefix(endpoint.URL, "tcp://"):
 		return EndpointTypeTCP
+	case strings.HasPrefix(endpoint.URL, "sctp://"):
+		return EndpointTypeSCTP
+	case strings.HasPrefix(endpoint.URL, "udp://"):
+		return EndpointTypeUDP
 	case strings.HasPrefix(endpoint.URL, "icmp://"):
 		return EndpointTypeICMP
 	case strings.HasPrefix(endpoint.URL, "starttls://"):
 		return EndpointTypeSTARTTLS
 	case strings.HasPrefix(endpoint.URL, "tls://"):
 		return EndpointTypeTLS
-	default:
+	case strings.HasPrefix(endpoint.URL, "http://") || strings.HasPrefix(endpoint.URL, "https://"):
 		return EndpointTypeHTTP
+	default:
+		return EndpointTypeUNKNOWN
 	}
 }
 
-// ValidateAndSetDefaults validates the endpoint's configuration and sets the default value of fields that have one
+// ValidateAndSetDefaults validates the endpoint's configuration and sets the default value of args that have one
 func (endpoint *Endpoint) ValidateAndSetDefaults() error {
 	// Set default values
 	if endpoint.ClientConfig == nil {
@@ -145,6 +166,10 @@ func (endpoint *Endpoint) ValidateAndSetDefaults() error {
 	}
 	if endpoint.UIConfig == nil {
 		endpoint.UIConfig = ui.GetDefaultConfig()
+	} else {
+		if err := endpoint.UIConfig.ValidateAndSetDefaults(); err != nil {
+			return err
+		}
 	}
 	if endpoint.Interval == 0 {
 		endpoint.Interval = 1 * time.Minute
@@ -181,9 +206,20 @@ func (endpoint *Endpoint) ValidateAndSetDefaults() error {
 	if len(endpoint.Conditions) == 0 {
 		return ErrEndpointWithNoCondition
 	}
+	for _, c := range endpoint.Conditions {
+		if endpoint.Interval < 5*time.Minute && c.hasDomainExpirationPlaceholder() {
+			return ErrInvalidEndpointIntervalForDomainExpirationPlaceholder
+		}
+		if err := c.Validate(); err != nil {
+			return fmt.Errorf("%v: %w", ErrInvalidConditionFormat, err)
+		}
+	}
 	if endpoint.DNS != nil {
 		return endpoint.DNS.validateAndSetDefault()
 	}
+	if endpoint.Type() == EndpointTypeUNKNOWN {
+		return ErrUnknownEndpointType
+	}
 	// Make sure that the request can be created
 	_, err := http.NewRequest(endpoint.Method, endpoint.URL, bytes.NewBuffer([]byte(endpoint.Body)))
 	if err != nil {
@@ -208,12 +244,35 @@ func (endpoint Endpoint) Key() string {
 // EvaluateHealth sends a request to the endpoint's URL and evaluates the conditions of the endpoint.
 func (endpoint *Endpoint) EvaluateHealth() *Result {
 	result := &Result{Success: true, Errors: []string{}}
-	endpoint.getIP(result)
+	// Parse or extract hostname from URL
+	if endpoint.DNS != nil {
+		result.Hostname = strings.TrimSuffix(endpoint.URL, ":53")
+	} else {
+		urlObject, err := url.Parse(endpoint.URL)
+		if err != nil {
+			result.AddError(err.Error())
+		} else {
+			result.Hostname = urlObject.Hostname()
+		}
+	}
+	// Retrieve IP if necessary
+	if endpoint.needsToRetrieveIP() {
+		endpoint.getIP(result)
+	}
+	// Retrieve domain expiration if necessary
+	if endpoint.needsToRetrieveDomainExpiration() && len(result.Hostname) > 0 {
+		var err error
+		if result.DomainExpiration, err = client.GetDomainExpiration(result.Hostname); err != nil {
+			result.AddError(err.Error())
+		}
+	}
+	// Call the endpoint (if there's no errors)
 	if len(result.Errors) == 0 {
 		endpoint.call(result)
 	} else {
 		result.Success = false
 	}
+	// Evaluate the conditions
 	for _, condition := range endpoint.Conditions {
 		success := condition.evaluate(result, endpoint.UIConfig.DontResolveFailedConditions)
 		if !success {
@@ -239,22 +298,12 @@ func (endpoint *Endpoint) EvaluateHealth() *Result {
 }
 
 func (endpoint *Endpoint) getIP(result *Result) {
-	if endpoint.DNS != nil {
-		result.Hostname = strings.TrimSuffix(endpoint.URL, ":53")
-	} else {
-		urlObject, err := url.Parse(endpoint.URL)
-		if err != nil {
-			result.AddError(err.Error())
-			return
-		}
-		result.Hostname = urlObject.Hostname()
-	}
-	ips, err := net.LookupIP(result.Hostname)
-	if err != nil {
+	if ips, err := net.LookupIP(result.Hostname); err != nil {
 		result.AddError(err.Error())
 		return
+	} else {
+		result.IP = ips[0].String()
 	}
-	result.IP = ips[0].String()
 }
 
 func (endpoint *Endpoint) call(result *Result) {
@@ -285,6 +334,12 @@ func (endpoint *Endpoint) call(result *Result) {
 	} else if endpointType == EndpointTypeTCP {
 		result.Connected = client.CanCreateTCPConnection(strings.TrimPrefix(endpoint.URL, "tcp://"), endpoint.ClientConfig)
 		result.Duration = time.Since(startTime)
+	} else if endpointType == EndpointTypeUDP {
+		result.Connected = client.CanCreateUDPConnection(strings.TrimPrefix(endpoint.URL, "udp://"), endpoint.ClientConfig)
+		result.Duration = time.Since(startTime)
+	} else if endpointType == EndpointTypeSCTP {
+		result.Connected = client.CanCreateSCTPConnection(strings.TrimPrefix(endpoint.URL, "sctp://"), endpoint.ClientConfig)
+		result.Duration = time.Since(startTime)
 	} else if endpointType == EndpointTypeICMP {
 		result.Connected, result.Duration = client.Ping(strings.TrimPrefix(endpoint.URL, "icmp://"), endpoint.ClientConfig)
 	} else {
@@ -305,7 +360,7 @@ func (endpoint *Endpoint) call(result *Result) {
 		if endpoint.needsToReadBody() {
 			result.body, err = io.ReadAll(response.Body)
 			if err != nil {
-				result.AddError(err.Error())
+				result.AddError("error reading response body:" + err.Error())
 			}
 		}
 	}
@@ -332,7 +387,7 @@ func (endpoint *Endpoint) buildHTTPRequest() *http.Request {
 	return request
 }
 
-// needsToReadBody checks if there's any conditions that requires the response body to be read
+// needsToReadBody checks if there's any condition that requires the response body to be read
 func (endpoint *Endpoint) needsToReadBody() bool {
 	for _, condition := range endpoint.Conditions {
 		if condition.hasBodyPlaceholder() {
@@ -341,3 +396,23 @@ func (endpoint *Endpoint) needsToReadBody() bool {
 	}
 	return false
 }
+
+// needsToRetrieveDomainExpiration checks if there's any condition that requires a whois query to be performed
+func (endpoint *Endpoint) needsToRetrieveDomainExpiration() bool {
+	for _, condition := range endpoint.Conditions {
+		if condition.hasDomainExpirationPlaceholder() {
+			return true
+		}
+	}
+	return false
+}
+
+// needsToRetrieveIP checks if there's any condition that requires an IP lookup
+func (endpoint *Endpoint) needsToRetrieveIP() bool {
+	for _, condition := range endpoint.Conditions {
+		if condition.hasIPPlaceholder() {
+			return true
+		}
+	}
+	return false
+}

core/endpoint_status.go

@@ -1,6 +1,6 @@
 package core
 
-import "github.com/TwiN/gatus/v4/util"
+import "github.com/TwiN/gatus/v5/util"
 
 // EndpointStatus contains the evaluation Results of an Endpoint
 type EndpointStatus struct {

core/endpoint_test.go

@@ -1,16 +1,245 @@
 package core
 
 import (
+	"bytes"
+	"crypto/tls"
+	"crypto/x509"
 	"io"
+	"net/http"
 	"strings"
 	"testing"
 	"time"
 
-	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v4/core/ui"
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/core/ui"
+	"github.com/TwiN/gatus/v5/test"
 )
 
+func TestEndpoint(t *testing.T) {
+	defer client.InjectHTTPClient(nil)
+	scenarios := []struct {
+		Name             string
+		Endpoint         Endpoint
+		ExpectedResult   *Result
+		MockRoundTripper test.MockRoundTripper
+	}{
+		{
+			Name: "success",
+			Endpoint: Endpoint{
+				Name:       "website-health",
+				URL:        "https://twin.sh/health",
+				Conditions: []Condition{"[STATUS] == 200", "[BODY].status == UP", "[CERTIFICATE_EXPIRATION] > 24h"},
+			},
+			ExpectedResult: &Result{
+				Success:   true,
+				Connected: true,
+				Hostname:  "twin.sh",
+				ConditionResults: []*ConditionResult{
+					{Condition: "[STATUS] == 200", Success: true},
+					{Condition: "[BODY].status == UP", Success: true},
+					{Condition: "[CERTIFICATE_EXPIRATION] > 24h", Success: true},
+				},
+				DomainExpiration: 0, // Because there's no [DOMAIN_EXPIRATION] condition, this is not resolved, so it should be 0.
+			},
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{
+					StatusCode: http.StatusOK,
+					Body:       io.NopCloser(bytes.NewBufferString(`{"status": "UP"}`)),
+					TLS:        &tls.ConnectionState{PeerCertificates: []*x509.Certificate{{NotAfter: time.Now().Add(9999 * time.Hour)}}},
+				}
+			}),
+		},
+		{
+			Name: "failed-body-condition",
+			Endpoint: Endpoint{
+				Name:       "website-health",
+				URL:        "https://twin.sh/health",
+				Conditions: []Condition{"[STATUS] == 200", "[BODY].status == UP"},
+			},
+			ExpectedResult: &Result{
+				Success:   false,
+				Connected: true,
+				Hostname:  "twin.sh",
+				ConditionResults: []*ConditionResult{
+					{Condition: "[STATUS] == 200", Success: true},
+					{Condition: "[BODY].status (DOWN) == UP", Success: false},
+				},
+				DomainExpiration: 0, // Because there's no [DOMAIN_EXPIRATION] condition, this is not resolved, so it should be 0.
+			},
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusOK, Body: io.NopCloser(bytes.NewBufferString(`{"status": "DOWN"}`))}
+			}),
+		},
+		{
+			Name: "failed-status-condition",
+			Endpoint: Endpoint{
+				Name:       "website-health",
+				URL:        "https://twin.sh/health",
+				Conditions: []Condition{"[STATUS] == 200"},
+			},
+			ExpectedResult: &Result{
+				Success:   false,
+				Connected: true,
+				Hostname:  "twin.sh",
+				ConditionResults: []*ConditionResult{
+					{Condition: "[STATUS] (502) == 200", Success: false},
+				},
+				DomainExpiration: 0, // Because there's no [DOMAIN_EXPIRATION] condition, this is not resolved, so it should be 0.
+			},
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusBadGateway, Body: http.NoBody}
+			}),
+		},
+		{
+			Name: "condition-with-failed-certificate-expiration",
+			Endpoint: Endpoint{
+				Name:       "website-health",
+				URL:        "https://twin.sh/health",
+				Conditions: []Condition{"[CERTIFICATE_EXPIRATION] > 100h"},
+				UIConfig:   &ui.Config{DontResolveFailedConditions: true},
+			},
+			ExpectedResult: &Result{
+				Success:   false,
+				Connected: true,
+				Hostname:  "twin.sh",
+				ConditionResults: []*ConditionResult{
+					// Because UIConfig.DontResolveFailedConditions is true, the values in the condition should not be resolved
+					{Condition: "[CERTIFICATE_EXPIRATION] > 100h", Success: false},
+				},
+				DomainExpiration: 0, // Because there's no [DOMAIN_EXPIRATION] condition, this is not resolved, so it should be 0.
+			},
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{
+					StatusCode: http.StatusOK,
+					Body:       http.NoBody,
+					TLS:        &tls.ConnectionState{PeerCertificates: []*x509.Certificate{{NotAfter: time.Now().Add(5 * time.Hour)}}},
+				}
+			}),
+		},
+		{
+			Name: "domain-expiration",
+			Endpoint: Endpoint{
+				Name:       "website-health",
+				URL:        "https://twin.sh/health",
+				Conditions: []Condition{"[DOMAIN_EXPIRATION] > 100h"},
+			},
+			ExpectedResult: &Result{
+				Success:   true,
+				Connected: true,
+				Hostname:  "twin.sh",
+				ConditionResults: []*ConditionResult{
+					{Condition: "[DOMAIN_EXPIRATION] > 100h", Success: true},
+				},
+				DomainExpiration: 999999 * time.Hour, // Note that this test only checks if it's non-zero.
+			},
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+		},
+		{
+			Name: "endpoint-that-will-time-out-and-hidden-hostname",
+			Endpoint: Endpoint{
+				Name:         "endpoint-that-will-time-out",
+				URL:          "https://twin.sh/health",
+				Conditions:   []Condition{"[CONNECTED] == true"},
+				UIConfig:     &ui.Config{HideHostname: true},
+				ClientConfig: &client.Config{Timeout: time.Millisecond},
+			},
+			ExpectedResult: &Result{
+				Success:   false,
+				Connected: false,
+				Hostname:  "", // Because Endpoint.UIConfig.HideHostname is true, this should be empty.
+				ConditionResults: []*ConditionResult{
+					{Condition: "[CONNECTED] (false) == true", Success: false},
+				},
+				// Because there's no [DOMAIN_EXPIRATION] condition, this is not resolved, so it should be 0.
+				DomainExpiration: 0,
+				// Because Endpoint.UIConfig.HideHostname is true, the hostname should be replaced by <redacted>.
+				Errors: []string{`Get "https://<redacted>/health": context deadline exceeded (Client.Timeout exceeded while awaiting headers)`},
+			},
+			MockRoundTripper: nil,
+		},
+		{
+			Name: "endpoint-that-will-time-out-and-hidden-url",
+			Endpoint: Endpoint{
+				Name:         "endpoint-that-will-time-out",
+				URL:          "https://twin.sh/health",
+				Conditions:   []Condition{"[CONNECTED] == true"},
+				UIConfig:     &ui.Config{HideURL: true},
+				ClientConfig: &client.Config{Timeout: time.Millisecond},
+			},
+			ExpectedResult: &Result{
+				Success:   false,
+				Connected: false,
+				Hostname:  "twin.sh",
+				ConditionResults: []*ConditionResult{
+					{Condition: "[CONNECTED] (false) == true", Success: false},
+				},
+				// Because there's no [DOMAIN_EXPIRATION] condition, this is not resolved, so it should be 0.
+				DomainExpiration: 0,
+				// Because Endpoint.UIConfig.HideURL is true, the URL should be replaced by <redacted>.
+				Errors: []string{`Get "<redacted>": context deadline exceeded (Client.Timeout exceeded while awaiting headers)`},
+			},
+			MockRoundTripper: nil,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			if scenario.MockRoundTripper != nil {
+				mockClient := &http.Client{Transport: scenario.MockRoundTripper}
+				if scenario.Endpoint.ClientConfig != nil && scenario.Endpoint.ClientConfig.Timeout > 0 {
+					mockClient.Timeout = scenario.Endpoint.ClientConfig.Timeout
+				}
+				client.InjectHTTPClient(mockClient)
+			} else {
+				client.InjectHTTPClient(nil)
+			}
+			scenario.Endpoint.ValidateAndSetDefaults()
+			result := scenario.Endpoint.EvaluateHealth()
+			if result.Success != scenario.ExpectedResult.Success {
+				t.Errorf("Expected success to be %v, got %v", scenario.ExpectedResult.Success, result.Success)
+			}
+			if result.Connected != scenario.ExpectedResult.Connected {
+				t.Errorf("Expected connected to be %v, got %v", scenario.ExpectedResult.Connected, result.Connected)
+			}
+			if result.Hostname != scenario.ExpectedResult.Hostname {
+				t.Errorf("Expected hostname to be %v, got %v", scenario.ExpectedResult.Hostname, result.Hostname)
+			}
+			if len(result.ConditionResults) != len(scenario.ExpectedResult.ConditionResults) {
+				t.Errorf("Expected %v condition results, got %v", len(scenario.ExpectedResult.ConditionResults), len(result.ConditionResults))
+			} else {
+				for i, conditionResult := range result.ConditionResults {
+					if conditionResult.Condition != scenario.ExpectedResult.ConditionResults[i].Condition {
+						t.Errorf("Expected condition to be %v, got %v", scenario.ExpectedResult.ConditionResults[i].Condition, conditionResult.Condition)
+					}
+					if conditionResult.Success != scenario.ExpectedResult.ConditionResults[i].Success {
+						t.Errorf("Expected success of condition '%s' to be %v, got %v", conditionResult.Condition, scenario.ExpectedResult.ConditionResults[i].Success, conditionResult.Success)
+					}
+				}
+			}
+			if len(result.Errors) != len(scenario.ExpectedResult.Errors) {
+				t.Errorf("Expected %v errors, got %v", len(scenario.ExpectedResult.Errors), len(result.Errors))
+			} else {
+				for i, err := range result.Errors {
+					if err != scenario.ExpectedResult.Errors[i] {
+						t.Errorf("Expected error to be %v, got %v", scenario.ExpectedResult.Errors[i], err)
+					}
+				}
+			}
+			if result.DomainExpiration != scenario.ExpectedResult.DomainExpiration {
+				// Note that DomainExpiration is only resolved if there's a condition with the DomainExpirationPlaceholder in it.
+				// In other words, if there's no condition with [DOMAIN_EXPIRATION] in it, the DomainExpiration field will be 0.
+				// Because this is a live call, mocking it would be too much of a pain, so we're just going to check if
+				// the actual value is non-zero when the expected result is non-zero.
+				if scenario.ExpectedResult.DomainExpiration.Hours() > 0 && !(result.DomainExpiration.Hours() > 0) {
+					t.Errorf("Expected domain expiration to be non-zero, got %v", result.DomainExpiration)
+				}
+			}
+		})
+	}
+}
+
 func TestEndpoint_IsEnabled(t *testing.T) {
 	if !(Endpoint{Enabled: nil}).IsEnabled() {
 		t.Error("endpoint.IsEnabled() should've returned true, because Enabled was set to nil")
@@ -24,53 +253,84 @@ func TestEndpoint_IsEnabled(t *testing.T) {
 }
 
 func TestEndpoint_Type(t *testing.T) {
-	type fields struct {
+	type args struct {
 		URL string
 		DNS *DNS
 	}
 	tests := []struct {
-		fields fields
-		want   EndpointType
-	}{{
-		fields: fields{
-			URL: "1.1.1.1",
-			DNS: &DNS{
-				QueryType: "A",
-				QueryName: "example.com",
+		args args
+		want EndpointType
+	}{
+		{
+			args: args{
+				URL: "8.8.8.8",
+				DNS: &DNS{
+					QueryType: "A",
+					QueryName: "example.com",
+				},
 			},
+			want: EndpointTypeDNS,
 		},
-		want: EndpointTypeDNS,
-	}, {
-		fields: fields{
-			URL: "tcp://127.0.0.1:6379",
+		{
+			args: args{
+				URL: "tcp://127.0.0.1:6379",
+			},
+			want: EndpointTypeTCP,
 		},
-		want: EndpointTypeTCP,
-	}, {
-		fields: fields{
-			URL: "icmp://example.com",
+		{
+			args: args{
+				URL: "icmp://example.com",
+			},
+			want: EndpointTypeICMP,
 		},
-		want: EndpointTypeICMP,
-	}, {
-		fields: fields{
-			URL: "starttls://smtp.gmail.com:587",
+		{
+			args: args{
+				URL: "sctp://example.com",
+			},
+			want: EndpointTypeSCTP,
 		},
-		want: EndpointTypeSTARTTLS,
-	}, {
-		fields: fields{
-			URL: "tls://example.com:443",
+		{
+			args: args{
+				URL: "udp://example.com",
+			},
+			want: EndpointTypeUDP,
 		},
-		want: EndpointTypeTLS,
-	}, {
-		fields: fields{
-			URL: "https://twin.sh/health",
+		{
+			args: args{
+				URL: "starttls://smtp.gmail.com:587",
+			},
+			want: EndpointTypeSTARTTLS,
 		},
-		want: EndpointTypeHTTP,
-	}}
+		{
+			args: args{
+				URL: "tls://example.com:443",
+			},
+			want: EndpointTypeTLS,
+		},
+		{
+			args: args{
+				URL: "https://twin.sh/health",
+			},
+			want: EndpointTypeHTTP,
+		},
+		{
+			args: args{
+				URL: "invalid://example.org",
+			},
+			want: EndpointTypeUNKNOWN,
+		},
+		{
+			args: args{
+				URL: "no-scheme",
+			},
+			want: EndpointTypeUNKNOWN,
+		},
+	}
 	for _, tt := range tests {
 		t.Run(string(tt.want), func(t *testing.T) {
 			endpoint := Endpoint{
-				URL: tt.fields.URL,
-				DNS: tt.fields.DNS,
+				URL: tt.args.URL,
+				DNS: tt.args.DNS,
 			}
 			if got := endpoint.Type(); got != tt.want {
 				t.Errorf("Endpoint.Type() = %v, want %v", got, tt.want)
@@ -86,7 +346,9 @@ func TestEndpoint_ValidateAndSetDefaults(t *testing.T) {
 		Conditions: []Condition{Condition("[STATUS] == 200")},
 		Alerts:     []*alert.Alert{{Type: alert.TypePagerDuty}},
 	}
-	endpoint.ValidateAndSetDefaults()
+	if err := endpoint.ValidateAndSetDefaults(); err != nil {
+		t.Errorf("Expected no error, got %v", err)
+	}
 	if endpoint.ClientConfig == nil {
 		t.Error("client configuration should've been set to the default configuration")
 	} else {
@@ -112,8 +374,8 @@ func TestEndpoint_ValidateAndSetDefaults(t *testing.T) {
 	if len(endpoint.Alerts) != 1 {
 		t.Error("Endpoint should've had 1 alert")
 	}
-	if endpoint.Alerts[0].IsEnabled() {
-		t.Error("Endpoint alert should've defaulted to disabled")
+	if !endpoint.Alerts[0].IsEnabled() {
+		t.Error("Endpoint alert should've defaulted to true")
 	}
 	if endpoint.Alerts[0].SuccessThreshold != 2 {
 		t.Error("Endpoint alert should've defaulted to a success threshold of 2")
@@ -123,12 +385,22 @@ func TestEndpoint_ValidateAndSetDefaults(t *testing.T) {
 	}
 }
 
+func TestEndpoint_ValidateAndSetDefaultsWithInvalidCondition(t *testing.T) {
+	endpoint := Endpoint{
+		Name:       "invalid-condition",
+		URL:        "https://twin.sh/health",
+		Conditions: []Condition{"[STATUS] invalid 200"},
+	}
+	if err := endpoint.ValidateAndSetDefaults(); err == nil {
+		t.Error("endpoint validation should've returned an error, but didn't")
+	}
+}
+
 func TestEndpoint_ValidateAndSetDefaultsWithClientConfig(t *testing.T) {
-	condition := Condition("[STATUS] == 200")
 	endpoint := Endpoint{
 		Name:       "website-health",
 		URL:        "https://twin.sh/health",
-		Conditions: []Condition{condition},
+		Conditions: []Condition{Condition("[STATUS] == 200")},
 		ClientConfig: &client.Config{
 			Insecure:       true,
 			IgnoreRedirect: true,
@@ -151,51 +423,10 @@ func TestEndpoint_ValidateAndSetDefaultsWithClientConfig(t *testing.T) {
 	}
 }
 
-func TestEndpoint_ValidateAndSetDefaultsWithNoName(t *testing.T) {
-	defer func() { recover() }()
-	condition := Condition("[STATUS] == 200")
-	endpoint := &Endpoint{
-		Name:       "",
-		URL:        "http://example.com",
-		Conditions: []Condition{condition},
-	}
-	err := endpoint.ValidateAndSetDefaults()
-	if err == nil {
-		t.Fatal("Should've returned an error because endpoint didn't have a name, which is a mandatory field")
-	}
-}
-
-func TestEndpoint_ValidateAndSetDefaultsWithNoUrl(t *testing.T) {
-	defer func() { recover() }()
-	condition := Condition("[STATUS] == 200")
-	endpoint := &Endpoint{
-		Name:       "example",
-		URL:        "",
-		Conditions: []Condition{condition},
-	}
-	err := endpoint.ValidateAndSetDefaults()
-	if err == nil {
-		t.Fatal("Should've returned an error because endpoint didn't have an url, which is a mandatory field")
-	}
-}
-
-func TestEndpoint_ValidateAndSetDefaultsWithNoConditions(t *testing.T) {
-	defer func() { recover() }()
-	endpoint := &Endpoint{
-		Name:       "example",
-		URL:        "http://example.com",
-		Conditions: nil,
-	}
-	err := endpoint.ValidateAndSetDefaults()
-	if err == nil {
-		t.Fatal("Should've returned an error because endpoint didn't have at least 1 condition")
-	}
-}
-
 func TestEndpoint_ValidateAndSetDefaultsWithDNS(t *testing.T) {
 	endpoint := &Endpoint{
 		Name: "dns-test",
-		URL:  "http://example.com",
+		URL:  "https://example.com",
 		DNS: &DNS{
 			QueryType: "A",
 			QueryName: "example.com",
@@ -204,13 +435,70 @@ func TestEndpoint_ValidateAndSetDefaultsWithDNS(t *testing.T) {
 	}
 	err := endpoint.ValidateAndSetDefaults()
 	if err != nil {
-
+		t.Error("did not expect an error, got", err)
 	}
 	if endpoint.DNS.QueryName != "example.com." {
 		t.Error("Endpoint.dns.query-name should be formatted with . suffix")
 	}
 }
 
+func TestEndpoint_ValidateAndSetDefaultsWithSimpleErrors(t *testing.T) {
+	scenarios := []struct {
+		endpoint    *Endpoint
+		expectedErr error
+	}{
+		{
+			endpoint: &Endpoint{
+				Name:       "",
+				URL:        "https://example.com",
+				Conditions: []Condition{Condition("[STATUS] == 200")},
+			},
+			expectedErr: ErrEndpointWithNoName,
+		},
+		{
+			endpoint: &Endpoint{
+				Name:       "endpoint-with-no-url",
+				URL:        "",
+				Conditions: []Condition{Condition("[STATUS] == 200")},
+			},
+			expectedErr: ErrEndpointWithNoURL,
+		},
+		{
+			endpoint: &Endpoint{
+				Name:       "endpoint-with-no-conditions",
+				URL:        "https://example.com",
+				Conditions: nil,
+			},
+			expectedErr: ErrEndpointWithNoCondition,
+		},
+		{
+			endpoint: &Endpoint{
+				Name:       "domain-expiration-with-bad-interval",
+				URL:        "https://example.com",
+				Interval:   time.Minute,
+				Conditions: []Condition{Condition("[DOMAIN_EXPIRATION] > 720h")},
+			},
+			expectedErr: ErrInvalidEndpointIntervalForDomainExpirationPlaceholder,
+		},
+		{
+			endpoint: &Endpoint{
+				Name:       "domain-expiration-with-good-interval",
+				URL:        "https://example.com",
+				Interval:   5 * time.Minute,
+				Conditions: []Condition{Condition("[DOMAIN_EXPIRATION] > 720h")},
+			},
+			expectedErr: nil,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.endpoint.Name, func(t *testing.T) {
+			if err := scenario.endpoint.ValidateAndSetDefaults(); err != scenario.expectedErr {
+				t.Errorf("Expected error %v, got %v", scenario.expectedErr, err)
+			}
+		})
+	}
+}
+
 func TestEndpoint_buildHTTPRequest(t *testing.T) {
 	condition := Condition("[STATUS] == 200")
 	endpoint := Endpoint{
@@ -330,72 +618,6 @@ func TestIntegrationEvaluateHealth(t *testing.T) {
 	}
 }
 
-func TestIntegrationEvaluateHealthWithFailure(t *testing.T) {
-	condition := Condition("[STATUS] == 500")
-	endpoint := Endpoint{
-		Name:       "website-health",
-		URL:        "https://twin.sh/health",
-		Conditions: []Condition{condition},
-	}
-	endpoint.ValidateAndSetDefaults()
-	result := endpoint.EvaluateHealth()
-	if result.ConditionResults[0].Success {
-		t.Errorf("Condition '%s' should have been a failure", condition)
-	}
-	if !result.Connected {
-		t.Error("Because the connection has been established, result.Connected should've been true")
-	}
-	if result.Success {
-		t.Error("Because one of the conditions failed, result.Success should have been false")
-	}
-}
-
-func TestIntegrationEvaluateHealthWithInvalidCondition(t *testing.T) {
-	condition := Condition("[STATUS] invalid 200")
-	endpoint := Endpoint{
-		Name:       "invalid-condition",
-		URL:        "https://twin.sh/health",
-		Conditions: []Condition{condition},
-	}
-	if err := endpoint.ValidateAndSetDefaults(); err != nil {
-		// XXX: Should this really not return an error? After all, the condition is not valid and conditions are part of the endpoint...
-		t.Error("endpoint validation should've been successful, but wasn't")
-	}
-	result := endpoint.EvaluateHealth()
-	if result.Success {
-		t.Error("Because one of the conditions was invalid, result.Success should have been false")
-	}
-	if len(result.Errors) == 0 {
-		t.Error("There should've been an error")
-	}
-}
-
-func TestIntegrationEvaluateHealthWithError(t *testing.T) {
-	condition := Condition("[STATUS] == 200")
-	endpoint := Endpoint{
-		Name:       "invalid-host",
-		URL:        "http://invalid/health",
-		Conditions: []Condition{condition},
-		UIConfig: &ui.Config{
-			HideHostname: true,
-		},
-	}
-	endpoint.ValidateAndSetDefaults()
-	result := endpoint.EvaluateHealth()
-	if result.Success {
-		t.Error("Because one of the conditions was invalid, result.Success should have been false")
-	}
-	if len(result.Errors) == 0 {
-		t.Error("There should've been an error")
-	}
-	if !strings.Contains(result.Errors[0], "<redacted>") {
-		t.Error("result.Errors[0] should've had the hostname redacted because ui.hide-hostname is set to true")
-	}
-	if result.Hostname != "" {
-		t.Error("result.Hostname should've been empty because ui.hide-hostname is set to true")
-	}
-}
-
 func TestIntegrationEvaluateHealthWithErrorAndHideURL(t *testing.T) {
 	endpoint := Endpoint{
 		Name:       "invalid-url",
@@ -426,7 +648,7 @@ func TestIntegrationEvaluateHealthForDNS(t *testing.T) {
 	conditionBody := Condition("[BODY] == 93.184.216.34")
 	endpoint := Endpoint{
 		Name: "example",
-		URL:  "1.1.1.1",
+		URL:  "8.8.8.8",
 		DNS: &DNS{
 			QueryType: "A",
 			QueryName: "example.com.",
@@ -436,7 +658,7 @@ func TestIntegrationEvaluateHealthForDNS(t *testing.T) {
 	endpoint.ValidateAndSetDefaults()
 	result := endpoint.EvaluateHealth()
 	if !result.ConditionResults[0].Success {
-		t.Errorf("Conditions '%s' and %s should have been a success", conditionSuccess, conditionBody)
+		t.Errorf("Conditions '%s' and '%s' should have been a success", conditionSuccess, conditionBody)
 	}
 	if !result.Connected {
 		t.Error("Because the connection has been established, result.Connected should've been true")
@@ -447,16 +669,15 @@ func TestIntegrationEvaluateHealthForDNS(t *testing.T) {
 }
 
 func TestIntegrationEvaluateHealthForICMP(t *testing.T) {
-	conditionSuccess := Condition("[CONNECTED] == true")
 	endpoint := Endpoint{
 		Name:       "icmp-test",
 		URL:        "icmp://127.0.0.1",
-		Conditions: []Condition{conditionSuccess},
+		Conditions: []Condition{"[CONNECTED] == true"},
 	}
 	endpoint.ValidateAndSetDefaults()
 	result := endpoint.EvaluateHealth()
 	if !result.ConditionResults[0].Success {
-		t.Errorf("Conditions '%s' should have been a success", conditionSuccess)
+		t.Errorf("Conditions '%s' should have been a success", endpoint.Conditions[0])
 	}
 	if !result.Connected {
 		t.Error("Because the connection has been established, result.Connected should've been true")
@@ -466,12 +687,20 @@ func TestIntegrationEvaluateHealthForICMP(t *testing.T) {
 	}
 }
 
+func TestEndpoint_DisplayName(t *testing.T) {
+	if endpoint := (Endpoint{Name: "n"}); endpoint.DisplayName() != "n" {
+		t.Error("endpoint.DisplayName() should've been 'n', but was", endpoint.DisplayName())
+	}
+	if endpoint := (Endpoint{Group: "g", Name: "n"}); endpoint.DisplayName() != "g/n" {
+		t.Error("endpoint.DisplayName() should've been 'g/n', but was", endpoint.DisplayName())
+	}
+}
+
 func TestEndpoint_getIP(t *testing.T) {
-	conditionSuccess := Condition("[CONNECTED] == true")
 	endpoint := Endpoint{
 		Name:       "invalid-url-test",
 		URL:        "",
-		Conditions: []Condition{conditionSuccess},
+		Conditions: []Condition{"[CONNECTED] == true"},
 	}
 	result := &Result{}
 	endpoint.getIP(result)
@@ -480,7 +709,7 @@ func TestEndpoint_getIP(t *testing.T) {
 	}
 }
 
-func TestEndpoint_NeedsToReadBody(t *testing.T) {
+func TestEndpoint_needsToReadBody(t *testing.T) {
 	statusCondition := Condition("[STATUS] == 200")
 	bodyCondition := Condition("[BODY].status == UP")
 	bodyConditionWithLength := Condition("len([BODY].tags) > 0")
@@ -503,3 +732,21 @@ func TestEndpoint_NeedsToReadBody(t *testing.T) {
 		t.Error("expected true, got false")
 	}
 }
+
+func TestEndpoint_needsToRetrieveDomainExpiration(t *testing.T) {
+	if (&Endpoint{Conditions: []Condition{"[STATUS] == 200"}}).needsToRetrieveDomainExpiration() {
+		t.Error("expected false, got true")
+	}
+	if !(&Endpoint{Conditions: []Condition{"[STATUS] == 200", "[DOMAIN_EXPIRATION] < 720h"}}).needsToRetrieveDomainExpiration() {
+		t.Error("expected true, got false")
+	}
+}
+
+func TestEndpoint_needsToRetrieveIP(t *testing.T) {
+	if (&Endpoint{Conditions: []Condition{"[STATUS] == 200"}}).needsToRetrieveIP() {
+		t.Error("expected false, got true")
+	}
+	if !(&Endpoint{Conditions: []Condition{"[STATUS] == 200", "[IP] == 127.0.0.1"}}).needsToRetrieveIP() {
+		t.Error("expected true, got false")
+	}
+}

core/health_status.go

@@ -1,11 +0,0 @@
-package core
-
-// HealthStatus is the status of Gatus
-type HealthStatus struct {
-	// Status is the state of Gatus (UP/DOWN)
-	Status string `json:"status"`
-
-	// Message is an accompanying description of why the status is as reported.
-	// If the Status is UP, no message will be provided
-	Message string `json:"message,omitempty"`
-}

core/result.go

@@ -41,6 +41,9 @@ type Result struct {
 	// CertificateExpiration is the duration before the certificate expires
 	CertificateExpiration time.Duration `json:"-"`
 
+	// DomainExpiration is the duration before the domain expires
+	DomainExpiration time.Duration `json:"-"`
+
 	// body is the response body
 	//
 	// Note that this variable is only used during the evaluation of an Endpoint's health.

core/ui/ui.go

@@ -1,13 +1,48 @@
 package ui
 
+import "errors"
+
 // Config is the UI configuration for core.Endpoint
 type Config struct {
 	// HideHostname whether to hide the hostname in the Result
 	HideHostname bool `yaml:"hide-hostname"`
+
 	// HideURL whether to ensure the URL is not displayed in the results. Useful if the URL contains a token.
 	HideURL bool `yaml:"hide-url"`
+
 	// DontResolveFailedConditions whether to resolve failed conditions in the Result for display in the UI
 	DontResolveFailedConditions bool `yaml:"dont-resolve-failed-conditions"`
+
+	// Badge is the configuration for the badges generated
+	Badge *Badge `yaml:"badge"`
+}
+
+type Badge struct {
+	ResponseTime *ResponseTime `yaml:"response-time"`
+}
+
+type ResponseTime struct {
+	Thresholds []int `yaml:"thresholds"`
+}
+
+var (
+	ErrInvalidBadgeResponseTimeConfig = errors.New("invalid response time badge configuration: expected parameter 'response-time' to have 5 ascending numerical values")
+)
+
+func (config *Config) ValidateAndSetDefaults() error {
+	if config.Badge != nil {
+		if len(config.Badge.ResponseTime.Thresholds) != 5 {
+			return ErrInvalidBadgeResponseTimeConfig
+		}
+		for i := 4; i > 0; i-- {
+			if config.Badge.ResponseTime.Thresholds[i] < config.Badge.ResponseTime.Thresholds[i-1] {
+				return ErrInvalidBadgeResponseTimeConfig
+			}
+		}
+	} else {
+		config.Badge = GetDefaultConfig().Badge
+	}
+	return nil
 }
 
 // GetDefaultConfig retrieves the default UI configuration
@@ -16,5 +51,10 @@ func GetDefaultConfig() *Config {
 		HideHostname:                false,
 		HideURL:                     false,
 		DontResolveFailedConditions: false,
+		Badge: &Badge{
+			ResponseTime: &ResponseTime{
+				Thresholds: []int{50, 200, 300, 500, 750},
+			},
+		},
 	}
 }

go.mod

@@ -1,56 +1,59 @@
-module github.com/TwiN/gatus/v4
+module github.com/TwiN/gatus/v5
 
-go 1.18
+go 1.19
 
 require (
-	github.com/TwiN/g8 v1.3.0
-	github.com/TwiN/gocache/v2 v2.0.0
-	github.com/TwiN/health v1.4.0
-	github.com/coreos/go-oidc/v3 v3.1.0
+	github.com/TwiN/g8 v1.4.0
+	github.com/TwiN/gocache/v2 v2.2.0
+	github.com/TwiN/health v1.5.0
+	github.com/TwiN/whois v1.1.0
+	github.com/coreos/go-oidc/v3 v3.4.0
 	github.com/go-ping/ping v0.0.0-20210911151512-381826476871
 	github.com/google/uuid v1.3.0
 	github.com/gorilla/mux v1.8.0
-	github.com/lib/pq v1.10.3
+	github.com/lib/pq v1.10.7
 	github.com/miekg/dns v1.1.43
-	github.com/prometheus/client_golang v1.11.0
+	github.com/prometheus/client_golang v1.14.0
 	github.com/wcharczuk/go-chart/v2 v2.1.0
 	golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9
-	golang.org/x/oauth2 v0.0.0-20210514164344-f6687ab2804c
+	golang.org/x/oauth2 v0.0.0-20220822191816-0ebed06d0094
 	gopkg.in/mail.v2 v2.3.1
 	gopkg.in/yaml.v2 v2.4.0
-	modernc.org/sqlite v1.13.1
+	modernc.org/sqlite v1.19.5
 )
 
 require (
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.1.2 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/ishidawataru/sctp v0.0.0-20210707070123-9a39160e9062
 	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51 // indirect
-	github.com/mattn/go-isatty v0.0.14 // indirect
+	github.com/mattn/go-isatty v0.0.16 // indirect
 	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
-	github.com/prometheus/client_model v0.2.0 // indirect
-	github.com/prometheus/common v0.31.1 // indirect
-	github.com/prometheus/procfs v0.7.3 // indirect
+	github.com/prometheus/client_model v0.3.0 // indirect
+	github.com/prometheus/common v0.37.0 // indirect
+	github.com/prometheus/procfs v0.8.0 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20200410134404-eec4a21b6bb0 // indirect
 	golang.org/x/image v0.0.0-20210628002857-a66eb6448b8d // indirect
 	golang.org/x/mod v0.5.1 // indirect
-	golang.org/x/net v0.0.0-20211209124913-491a49abca63 // indirect
-	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
-	golang.org/x/sys v0.0.0-20211003122950-b1ebd4e1001c // indirect
+	golang.org/x/net v0.0.0-20220826154423-83b083e8dc8b // indirect
+	golang.org/x/sync v0.0.0-20220601150217-0de741cfad7f // indirect
+	golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab // indirect
 	golang.org/x/tools v0.1.7 // indirect
-	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
-	google.golang.org/appengine v1.6.6 // indirect
-	google.golang.org/protobuf v1.27.1 // indirect
+	golang.org/x/xerrors v0.0.0-20220609144429-65e65417b02f // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
 	gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc // indirect
-	gopkg.in/square/go-jose.v2 v2.5.1 // indirect
-	lukechampine.com/uint128 v1.1.1 // indirect
-	modernc.org/cc/v3 v3.35.8 // indirect
-	modernc.org/ccgo/v3 v3.12.16 // indirect
-	modernc.org/libc v1.11.22 // indirect
-	modernc.org/mathutil v1.4.1 // indirect
-	modernc.org/memory v1.0.5 // indirect
-	modernc.org/opt v0.1.1 // indirect
-	modernc.org/strutil v1.1.1 // indirect
-	modernc.org/token v1.0.0 // indirect
+	gopkg.in/square/go-jose.v2 v2.6.0 // indirect
+	lukechampine.com/uint128 v1.2.0 // indirect
+	modernc.org/cc/v3 v3.40.0 // indirect
+	modernc.org/ccgo/v3 v3.16.13 // indirect
+	modernc.org/libc v1.21.5 // indirect
+	modernc.org/mathutil v1.5.0 // indirect
+	modernc.org/memory v1.4.0 // indirect
+	modernc.org/opt v0.1.3 // indirect
+	modernc.org/strutil v1.1.3 // indirect
+	modernc.org/token v1.0.1 // indirect
 )

go.sum

@@ -13,14 +13,36 @@ cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKV
 cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
 cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
 cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
+cloud.google.com/go v0.72.0/go.mod h1:M+5Vjvlc2wnp6tjzE102Dw08nGShTscUx2nZMufOKPI=
+cloud.google.com/go v0.74.0/go.mod h1:VV1xSbzvo+9QJOxLDaJfTjx5e+MePCpCWwvftOeQmWk=
+cloud.google.com/go v0.78.0/go.mod h1:QjdrLG0uq+YwhjoVOLsS1t7TW8fs36kLs4XO5R5ECHg=
+cloud.google.com/go v0.79.0/go.mod h1:3bzgcEeQlzbuEAYu4mrWhKqWjmpprinYgKJLgKHnbb8=
+cloud.google.com/go v0.81.0/go.mod h1:mk/AM35KwGk/Nm2YSeZbxXdrNK3KZOYHmLkOqC2V6E0=
+cloud.google.com/go v0.83.0/go.mod h1:Z7MJUsANfY0pYPdw0lbnivPx4/vhy/e2FEkSkF7vAVY=
+cloud.google.com/go v0.84.0/go.mod h1:RazrYuxIK6Kb7YrzzhPoLmCVzl7Sup4NrbKPg8KHSUM=
+cloud.google.com/go v0.87.0/go.mod h1:TpDYlFy7vuLzZMMZ+B6iRiELaY7z/gJPaqbMx6mlWcY=
+cloud.google.com/go v0.90.0/go.mod h1:kRX0mNRHe0e2rC6oNakvwQqzyDmg57xJ+SZU1eT2aDQ=
+cloud.google.com/go v0.93.3/go.mod h1:8utlLll2EF5XMAV15woO4lSbWQlk8rer9aLOfLh7+YI=
+cloud.google.com/go v0.94.1/go.mod h1:qAlAugsXlC+JWO+Bke5vCtc9ONxjQT3drlTTnAplMW4=
+cloud.google.com/go v0.97.0/go.mod h1:GF7l59pYBVlXQIBLx3a761cZ41F9bBH3JUlihCt2Udc=
+cloud.google.com/go v0.99.0/go.mod h1:w0Xx2nLzqWJPuozYQX+hFfCSI8WioryfRDzkoI/Y2ZA=
+cloud.google.com/go v0.100.2/go.mod h1:4Xra9TjzAeYHrl5+oeLlzbM2k3mjVhZh4UqTZ//w99A=
+cloud.google.com/go v0.102.0/go.mod h1:oWcCzKlqJ5zgHQt9YsaeTY9KzIvjyy0ArmiBUgpQ+nc=
 cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
 cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
 cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
 cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
 cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
 cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
+cloud.google.com/go/compute v0.1.0/go.mod h1:GAesmwr110a34z04OlxYkATPBEfVhkymfTBXtfbBFow=
+cloud.google.com/go/compute v1.3.0/go.mod h1:cCZiE1NHEtai4wiufUhW8I8S1JKkAnhnQJWM7YD99wM=
+cloud.google.com/go/compute v1.5.0/go.mod h1:9SMHyhJlzhlkJqrPAc839t2BZFTSk6Jdj6mkzQJeu0M=
+cloud.google.com/go/compute v1.6.0/go.mod h1:T29tfhtVbq1wvAPo0E3+7vhgmkOYeXjhFvz/FMzPu0s=
+cloud.google.com/go/compute v1.6.1/go.mod h1:g85FgpzFvNULZ+S8AYq87axRKuf2Kh7deLqV/jJ3thU=
+cloud.google.com/go/compute v1.7.0/go.mod h1:435lt8av5oL9P3fv1OEzSbSUe+ybHXGMPQHHZWZxy9U=
 cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
 cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
+cloud.google.com/go/iam v0.3.0/go.mod h1:XzJPvDayI+9zsASAFO68Hk07u3z+f+JrT2xXNdp4bnY=
 cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
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@@ -30,25 +52,31 @@ cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0Zeo
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@@ -57,26 +85,42 @@ github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5P
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@@ -94,6 +138,8 @@ github.com/golang/mock v1.4.0/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt
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@@ -109,8 +155,10 @@ github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QD
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@@ -120,13 +168,19 @@ github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
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@@ -134,21 +188,42 @@ github.com/google/pprof v0.0.0-20200212024743-f11f1df84d12/go.mod h1:ZgVRPoUq/hf
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@@ -263,6 +350,8 @@ golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHl
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@@ -271,6 +360,9 @@ golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzB
 golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
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+golang.org/x/mod v0.4.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/mod v0.4.1/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
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@@ -295,7 +387,6 @@ golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLL
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@@ -303,18 +394,46 @@ golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81R
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@@ -325,8 +444,9 @@ golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJ
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@@ -344,7 +464,6 @@ golang.org/x/sys v0.0.0-20191204072324-ce4227a45e2e/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -359,25 +478,57 @@ golang.org/x/sys v0.0.0-20200523222454-059865788121/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -421,14 +572,27 @@ golang.org/x/tools v0.0.0-20200618134242-20370b0cb4b2/go.mod h1:EkVYQZoAsY45+roY
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@@ -445,13 +609,37 @@ google.golang.org/api v0.24.0/go.mod h1:lIXQywCXRcnZPGlsd8NbLnOjtAoL6em04bJ9+z0M
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-google.golang.org/appengine v1.6.6 h1:lMO5rYAqUxkmaj76jAkRUvt5JZgFymx/+Q5Mzfivuhc=
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@@ -475,12 +663,61 @@ google.golang.org/genproto v0.0.0-20200312145019-da6875a35672/go.mod h1:55QSHmfG
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@@ -505,8 +762,10 @@ google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGj
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-modernc.org/ccgo/v3 v3.12.16/go.mod h1:4Irvb6s9pzGIjrtVfvDDgoAQAH/L7KpHjgTYvcAMXV0=
+lukechampine.com/uint128 v1.2.0 h1:mBi/5l91vocEN8otkC5bDLhi2KdCticRiwbdB0O+rjI=
+lukechampine.com/uint128 v1.2.0/go.mod h1:c4eWIwlEGaxC/+H1VguhU4PHXNWDCDMUlWdIWl2j1gk=
+modernc.org/cc/v3 v3.40.0 h1:P3g79IUS/93SYhtoeaHW+kRCIrYaxJ27MFPv+7kaTOw=
+modernc.org/cc/v3 v3.40.0/go.mod h1:/bTg4dnWkSXowUO6ssQKnOV0yMVxDYNIsIrzqTFDGH0=
+modernc.org/ccgo/v3 v3.16.13 h1:Mkgdzl46i5F/CNR/Kj80Ri59hC8TKAhZrYSaqvkwzUw=
+modernc.org/ccgo/v3 v3.16.13/go.mod h1:2Quk+5YgpImhPjv2Qsob1DnZ/4som1lJTodubIcoUkY=
+modernc.org/ccorpus v1.11.6 h1:J16RXiiqiCgua6+ZvQot4yUuUy8zxgqbqEEUuGPlISk=
 modernc.org/httpfs v1.0.6 h1:AAgIpFZRXuYnkjftxTAZwMIiwEqAfk8aVB2/oA6nAeM=
-modernc.org/httpfs v1.0.6/go.mod h1:7dosgurJGp0sPaRanU53W4xZYKh14wfzX420oZADeHM=
-modernc.org/libc v1.9.8/go.mod h1:U1eq8YWr/Kc1RWCMFUWEdkTg8OTcfLw2kY8EDwl039w=
-modernc.org/libc v1.9.11/go.mod h1:NyF3tsA5ArIjJ83XB0JlqhjTabTCHm9aX4XMPHyQn0Q=
-modernc.org/libc v1.11.0/go.mod h1:2lOfPmj7cz+g1MrPNmX65QCzVxgNq2C5o0jdLY2gAYg=
-modernc.org/libc v1.11.2/go.mod h1:ioIyrl3ETkugDO3SGZ+6EOKvlP3zSOycUETe4XM4n8M=
-modernc.org/libc v1.11.3/go.mod h1:k3HDCP95A6U111Q5TmG3nAyUcp3kR5YFZTeDS9v8vSU=
-modernc.org/libc v1.11.5/go.mod h1:k3HDCP95A6U111Q5TmG3nAyUcp3kR5YFZTeDS9v8vSU=
-modernc.org/libc v1.11.6/go.mod h1:ddqmzR6p5i4jIGK1d/EiSw97LBcE3dK24QEwCFvgNgE=
-modernc.org/libc v1.11.11/go.mod h1:lXEp9QOOk4qAYOtL3BmMve99S5Owz7Qyowzvg6LiZso=
-modernc.org/libc v1.11.13/go.mod h1:ZYawJWlXIzXy2Pzghaf7YfM8OKacP3eZQI81PDLFdY8=
-modernc.org/libc v1.11.16/go.mod h1:+DJquzYi+DMRUtWI1YNxrlQO6TcA5+dRRiq8HWBWRC8=
-modernc.org/libc v1.11.19/go.mod h1:e0dgEame6mkydy19KKaVPBeEnyJB4LGNb0bBH1EtQ3I=
-modernc.org/libc v1.11.22 h1:u2ek1qgzki0RUDI2kW3EC9VKHP9LXKxKnoQLZmIeCbA=
-modernc.org/libc v1.11.22/go.mod h1:FOSzE0UwookyT1TtCJrRkvsOrX2k38HoInhw+cSCUGk=
-modernc.org/mathutil v1.1.1/go.mod h1:mZW8CKdRPY1v87qxC/wUdX5O1qDzXMP5TH3wjfpga6E=
-modernc.org/mathutil v1.2.2/go.mod h1:mZW8CKdRPY1v87qxC/wUdX5O1qDzXMP5TH3wjfpga6E=
-modernc.org/mathutil v1.4.0/go.mod h1:mZW8CKdRPY1v87qxC/wUdX5O1qDzXMP5TH3wjfpga6E=
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jsonpath/jsonpath.go

@@ -9,21 +9,48 @@ import (
 
 // Eval is a half-baked json path implementation that needs some love
 func Eval(path string, b []byte) (string, int, error) {
+	if len(path) == 0 && !(len(b) != 0 && b[0] == '[' && b[len(b)-1] == ']') {
+		// if there's no path AND the value is not a JSON array, then there's nothing to walk
+		return string(b), len(b), nil
+	}
 	var object interface{}
-	err := json.Unmarshal(b, &object)
-	if err != nil {
-		// Try to unmarshal it into an array instead
+	if err := json.Unmarshal(b, &object); err != nil {
 		return "", 0, err
 	}
 	return walk(path, object)
 }
 
+// walk traverses the object and returns the value as a string as well as its length
 func walk(path string, object interface{}) (string, int, error) {
-	keys := strings.Split(path, ".")
+	var keys []string
+	startOfCurrentKey, bracketDepth := 0, 0
+	for i := range path {
+		if path[i] == '[' {
+			bracketDepth++
+		} else if path[i] == ']' {
+			bracketDepth--
+		}
+		// If we encounter a dot, we've reached the end of a key unless we're inside a bracket
+		if path[i] == '.' && bracketDepth == 0 {
+			keys = append(keys, path[startOfCurrentKey:i])
+			startOfCurrentKey = i + 1
+		}
+	}
+	if startOfCurrentKey <= len(path) {
+		keys = append(keys, path[startOfCurrentKey:])
+	}
 	currentKey := keys[0]
 	switch value := extractValue(currentKey, object).(type) {
 	case map[string]interface{}:
-		return walk(strings.Replace(path, fmt.Sprintf("%s.", currentKey), "", 1), value)
+		newPath := strings.Replace(path, fmt.Sprintf("%s.", currentKey), "", 1)
+		if path == newPath {
+			// If the path hasn't changed, it means we're at the end of the path
+			// So we'll treat it as a string by re-marshaling it to JSON since it's a map.
+			// Note that the output JSON will be minified.
+			b, err := json.Marshal(value)
+			return string(b), len(b), err
+		}
+		return walk(newPath, value)
 	case string:
 		if len(keys) > 1 {
 			return "", 0, fmt.Errorf("couldn't walk through '%s', because '%s' was a string instead of an object", keys[1], currentKey)
@@ -32,7 +59,8 @@ func walk(path string, object interface{}) (string, int, error) {
 	case []interface{}:
 		return fmt.Sprintf("%v", value), len(value), nil
 	case interface{}:
-		return fmt.Sprintf("%v", value), 1, nil
+		newValue := fmt.Sprintf("%v", value)
+		return newValue, len(newValue), nil
 	default:
 		return "", 0, fmt.Errorf("couldn't walk through '%s' because type was '%T', but expected 'map[string]interface{}'", currentKey, value)
 	}
@@ -41,37 +69,56 @@ func walk(path string, object interface{}) (string, int, error) {
 func extractValue(currentKey string, value interface{}) interface{} {
 	// Check if the current key ends with [#]
 	if strings.HasSuffix(currentKey, "]") && strings.Contains(currentKey, "[") {
-		tmp := strings.SplitN(currentKey, "[", 3)
-		arrayIndex, err := strconv.Atoi(strings.Replace(tmp[1], "]", "", 1))
+		var isNestedArray bool
+		var index string
+		startOfBracket, endOfBracket, bracketDepth := 0, 0, 0
+		for i := range currentKey {
+			if currentKey[i] == '[' {
+				startOfBracket = i
+				bracketDepth++
+			} else if currentKey[i] == ']' && bracketDepth == 1 {
+				bracketDepth--
+				endOfBracket = i
+				index = currentKey[startOfBracket+1 : i]
+				if len(currentKey) > i+1 && currentKey[i+1] == '[' {
+					isNestedArray = true // there's more keys.
+				}
+				break
+			}
+		}
+		arrayIndex, err := strconv.Atoi(index)
 		if err != nil {
 			return nil
 		}
-		currentKey := tmp[0]
-		// if currentKey contains only an index (i.e. [0] or 0)
-		if len(currentKey) == 0 {
+		currentKeyWithoutIndex := currentKey[:startOfBracket]
+		// if currentKeyWithoutIndex contains only an index (i.e. [0] or 0)
+		if len(currentKeyWithoutIndex) == 0 {
 			array := value.([]interface{})
 			if len(array) > arrayIndex {
-				if len(tmp) > 2 {
-					// Nested array? Go deeper.
-					return extractValue(fmt.Sprintf("%s[%s", currentKey, tmp[2]), array[arrayIndex])
+				if isNestedArray {
+					return extractValue(currentKey[endOfBracket+1:], array[arrayIndex])
 				}
 				return array[arrayIndex]
 			}
 			return nil
 		}
-		if value == nil || value.(map[string]interface{})[currentKey] == nil {
+		if value == nil || value.(map[string]interface{})[currentKeyWithoutIndex] == nil {
 			return nil
 		}
-		// if currentKey contains both a key and an index (i.e. data[0])
-		array := value.(map[string]interface{})[currentKey].([]interface{})
+		// if currentKeyWithoutIndex contains both a key and an index (i.e. data[0])
+		array := value.(map[string]interface{})[currentKeyWithoutIndex].([]interface{})
 		if len(array) > arrayIndex {
-			if len(tmp) > 2 {
-				// Nested array? Go deeper.
-				return extractValue(fmt.Sprintf("[%s", tmp[2]), array[arrayIndex])
+			if isNestedArray {
+				return extractValue(currentKey[endOfBracket+1:], array[arrayIndex])
 			}
 			return array[arrayIndex]
 		}
 		return nil
 	}
+	if valueAsSlice, ok := value.([]interface{}); ok {
+		// If the type is a slice, return it
+		return valueAsSlice
+	}
+	// otherwise, it's a map
 	return value.(map[string]interface{})[currentKey]
 }

jsonpath/jsonpath_bench_test.go

@@ -0,0 +1,11 @@
+package jsonpath
+
+import "testing"
+
+func BenchmarkEval(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		Eval("ids[0]", []byte(`{"ids": [1, 2]}`))
+		Eval("long.simple.walk", []byte(`{"long": {"simple": {"walk": "value"}}}`))
+		Eval("data[0].apps[1].name", []byte(`{"data": [{"apps": [{"name":"app1"}, {"name":"app2"}, {"name":"app3"}]}]}`))
+	}
+}

jsonpath/jsonpath_test.go

@@ -47,7 +47,7 @@ func TestEval(t *testing.T) {
 			ExpectedError:        false,
 		},
 		{
-			Name:                 "array-of-maps",
+			Name:                 "array-of-objects",
 			Path:                 "ids[1].id",
 			Data:                 `{"ids": [{"id": 1}, {"id": 2}]}`,
 			ExpectedOutput:       "2",
@@ -62,6 +62,14 @@ func TestEval(t *testing.T) {
 			ExpectedOutputLength: 1,
 			ExpectedError:        false,
 		},
+		{
+			Name:                 "array-of-values-with-no-path",
+			Path:                 "",
+			Data:                 `[1, 2]`,
+			ExpectedOutput:       "[1 2]", // the output is an array
+			ExpectedOutputLength: 2,
+			ExpectedError:        false,
+		},
 		{
 			Name:                 "array-of-values-and-invalid-index",
 			Path:                 "ids[wat]",
@@ -79,7 +87,15 @@ func TestEval(t *testing.T) {
 			ExpectedError:        false,
 		},
 		{
-			Name:                 "array-of-maps-at-root",
+			Name:                 "array-of-objects-at-root",
+			Path:                 "[0]",
+			Data:                 `[{"id": 1}, {"id": 2}]`,
+			ExpectedOutput:       `{"id":1}`,
+			ExpectedOutputLength: 8,
+			ExpectedError:        false,
+		},
+		{
+			Name:                 "array-of-objects-with-int-at-root",
 			Path:                 "[0].id",
 			Data:                 `[{"id": 1}, {"id": 2}]`,
 			ExpectedOutput:       "1",
@@ -87,7 +103,7 @@ func TestEval(t *testing.T) {
 			ExpectedError:        false,
 		},
 		{
-			Name:                 "array-of-maps-at-root-and-invalid-index",
+			Name:                 "array-of-objects-at-root-and-invalid-index",
 			Path:                 "[5].id",
 			Data:                 `[{"id": 1}, {"id": 2}]`,
 			ExpectedOutput:       "",
@@ -111,13 +127,29 @@ func TestEval(t *testing.T) {
 			ExpectedError:        false,
 		},
 		{
-			Name:                 "map-of-nested-arrays",
+			Name:                 "object-with-nested-arrays",
 			Path:                 "data[1][1]",
 			Data:                 `{"data": [["a", "b", "c"], ["d", "eeeee", "f"]]}`,
 			ExpectedOutput:       "eeeee",
 			ExpectedOutputLength: 5,
 			ExpectedError:        false,
 		},
+		{
+			Name:                 "object-with-arrays-of-objects",
+			Path:                 "data[0].apps[1].name",
+			Data:                 `{"data": [{"apps": [{"name":"app1"}, {"name":"app2"}, {"name":"app3"}]}]}`,
+			ExpectedOutput:       "app2",
+			ExpectedOutputLength: 4,
+			ExpectedError:        false,
+		},
+		{
+			Name:                 "object-with-arrays-of-objects-with-missing-element",
+			Path:                 "data[0].apps[1].name",
+			Data:                 `{"data": [{"apps": []}]}`,
+			ExpectedOutput:       "",
+			ExpectedOutputLength: 0,
+			ExpectedError:        true,
+		},
 		{
 			Name:                 "partially-invalid-path-issue122",
 			Path:                 "data.name.invalid",

main.go

@@ -7,10 +7,10 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/TwiN/gatus/v4/config"
-	"github.com/TwiN/gatus/v4/controller"
-	"github.com/TwiN/gatus/v4/storage/store"
-	"github.com/TwiN/gatus/v4/watchdog"
+	"github.com/TwiN/gatus/v5/config"
+	"github.com/TwiN/gatus/v5/controller"
+	"github.com/TwiN/gatus/v5/storage/store"
+	"github.com/TwiN/gatus/v5/watchdog"
 )
 
 func main() {
@@ -36,7 +36,7 @@ func main() {
 }
 
 func start(cfg *config.Config) {
-	go controller.Handle(cfg.Security, cfg.Web, cfg.UI, cfg.Metrics)
+	go controller.Handle(cfg)
 	watchdog.Monitor(cfg)
 	go listenToConfigurationFileChanges(cfg)
 }
@@ -66,7 +66,7 @@ func loadConfiguration() (cfg *config.Config, err error) {
 //
 // Q: "TwiN, why are you putting this here? Wouldn't it make more sense to have this in the config?!"
 // A: Yes. Yes it would make more sense to have it in the config package. But I don't want to import
-//    the massive SQL dependencies just because I want to import the config, so here we are.
+// the massive SQL dependencies just because I want to import the config, so here we are.
 func initializeStorage(cfg *config.Config) {
 	err := store.Initialize(cfg.Storage)
 	if err != nil {

metrics/metrics.go

@@ -3,7 +3,7 @@ package metrics
 import (
 	"strconv"
 
-	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v5/core"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promauto"
 )

metrics/metrics_test.go

@@ -5,7 +5,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v5/core"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/testutil"
 )
@@ -75,7 +75,7 @@ gatus_results_total{group="http-ep-group",key="http-ep-group_http-ep-name",name=
 	if err != nil {
 		t.Errorf("Expected no errors but got: %v", err)
 	}
-	dnsEndpoint := &core.Endpoint{Name: "dns-ep-name", Group: "dns-ep-group", URL: "1.1.1.1", DNS: &core.DNS{
+	dnsEndpoint := &core.Endpoint{Name: "dns-ep-name", Group: "dns-ep-group", URL: "8.8.8.8", DNS: &core.DNS{
 		QueryType: "A",
 		QueryName: "example.com.",
 	}}

storage/config.go

@@ -19,6 +19,12 @@ type Config struct {
 	// Type of store
 	// If blank, uses the default in-memory store
 	Type Type `yaml:"type"`
+
+	// Caching is whether to enable caching.
+	// This is used to drastically decrease read latency by pre-emptively caching writes
+	// as they happen, also known as the write-through caching strategy.
+	// Does not apply if Config.Type is not TypePostgres or TypeSQLite.
+	Caching bool `yaml:"caching,omitempty"`
 }
 
 // ValidateAndSetDefaults validates the configuration and sets the default values (if applicable)

storage/store/memory/memory.go

@@ -1,26 +1,17 @@
 package memory
 
 import (
-	"encoding/gob"
 	"sort"
 	"sync"
 	"time"
 
-	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v4/storage/store/common"
-	"github.com/TwiN/gatus/v4/storage/store/common/paging"
-	"github.com/TwiN/gatus/v4/util"
+	"github.com/TwiN/gatus/v5/core"
+	"github.com/TwiN/gatus/v5/storage/store/common"
+	"github.com/TwiN/gatus/v5/storage/store/common/paging"
+	"github.com/TwiN/gatus/v5/util"
 	"github.com/TwiN/gocache/v2"
 )
 
-func init() {
-	gob.Register(&core.EndpointStatus{})
-	gob.Register(&core.HourlyUptimeStatistics{})
-	gob.Register(&core.Uptime{})
-	gob.Register(&core.Result{})
-	gob.Register(&core.Event{})
-}
-
 // Store that leverages gocache
 type Store struct {
 	sync.RWMutex
@@ -32,7 +23,7 @@ type Store struct {
 //
 // This store holds everything in memory, and if the file parameter is not blank,
 // supports eventual persistence.
-func NewStore(file string) (*Store, error) {
+func NewStore() (*Store, error) {
 	store := &Store{
 		cache: gocache.NewCache().WithMaxSize(gocache.NoMaxSize),
 	}

storage/store/memory/memory_test.go

@@ -4,8 +4,8 @@ import (
 	"testing"
 	"time"
 
-	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v4/storage/store/common/paging"
+	"github.com/TwiN/gatus/v5/core"
+	"github.com/TwiN/gatus/v5/storage/store/common/paging"
 )
 
 var (
@@ -82,7 +82,7 @@ var (
 // Note that are much more extensive tests in /storage/store/store_test.go.
 // This test is simply an extra sanity check
 func TestStore_SanityCheck(t *testing.T) {
-	store, _ := NewStore("")
+	store, _ := NewStore()
 	defer store.Close()
 	store.Insert(&testEndpoint, &testSuccessfulResult)
 	endpointStatuses, _ := store.GetAllEndpointStatuses(paging.NewEndpointStatusParams())
@@ -122,22 +122,14 @@ func TestStore_SanityCheck(t *testing.T) {
 }
 
 func TestStore_Save(t *testing.T) {
-	files := []string{
-		"",
-		t.TempDir() + "/test.db",
+	store, err := NewStore()
+	if err != nil {
+		t.Fatal("expected no error, got", err.Error())
 	}
-	for _, file := range files {
-		t.Run(file, func(t *testing.T) {
-			store, err := NewStore(file)
-			if err != nil {
-				t.Fatal("expected no error, got", err.Error())
-			}
-			err = store.Save()
-			if err != nil {
-				t.Fatal("expected no error, got", err.Error())
-			}
-			store.Clear()
-			store.Close()
-		})
+	err = store.Save()
+	if err != nil {
+		t.Fatal("expected no error, got", err.Error())
 	}
+	store.Clear()
+	store.Close()
 }

storage/store/memory/uptime.go

@@ -3,7 +3,7 @@ package memory
 import (
 	"time"
 
-	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v5/core"
 )
 
 const (