Initial release

This commit is contained in:
Marcus Noble 2021-07-07 11:05:36 +01:00
commit d91f18615d
10 changed files with 578 additions and 0 deletions

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Dockerfile
README.md
Makefile

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### Git ###
# Created by git for backups. To disable backups in Git:
# $ git config --global mergetool.keepBackup false
*.orig
# Created by git when using merge tools for conflicts
*.BACKUP.*
*.BASE.*
*.LOCAL.*
*.REMOTE.*
*_BACKUP_*.txt
*_BASE_*.txt
*_LOCAL_*.txt
*_REMOTE_*.txt
### Go ###
# Binaries for programs and plugins
*.exe
*.exe~
*.dll
*.so
*.dylib
# Test binary, built with `go test -c`
*.test
# Output of the go coverage tool, specifically when used with LiteIDE
*.out
# Dependency directories (remove the comment below to include it)
# vendor/
### Go Patch ###
/vendor/
/Godeps/
### Node ###
# Logs
logs
*.log
npm-debug.log*
yarn-debug.log*
yarn-error.log*
lerna-debug.log*
# Diagnostic reports (https://nodejs.org/api/report.html)
report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
# Runtime data
pids
*.pid
*.seed
*.pid.lock
# Directory for instrumented libs generated by jscoverage/JSCover
lib-cov
# Coverage directory used by tools like istanbul
coverage
*.lcov
# nyc test coverage
.nyc_output
# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
.grunt
# Bower dependency directory (https://bower.io/)
bower_components
# node-waf configuration
.lock-wscript
# Compiled binary addons (https://nodejs.org/api/addons.html)
build/Release
# Dependency directories
node_modules/
jspm_packages/
# TypeScript v1 declaration files
typings/
# TypeScript cache
*.tsbuildinfo
# Optional npm cache directory
.npm
# Optional eslint cache
.eslintcache
# Optional REPL history
.node_repl_history
# Output of 'npm pack'
*.tgz
# Yarn Integrity file
.yarn-integrity
# dotenv environment variables file
.env
.env.test
# parcel-bundler cache (https://parceljs.org/)
.cache
# next.js build output
.next
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.nuxt
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# Storybook build outputs
.out
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# vuepress build output
.vuepress/dist
# Serverless directories
.serverless/
# FuseBox cache
.fusebox/
# DynamoDB Local files
.dynamodb/
# Temporary folders
tmp/
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# VSCode
.vscode/*
!.vscode/settings.json
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*.code-workspace
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# MacOS
# General
.DS_Store
.AppleDouble
.LSOverride
# Thumbnails
._*
# Files that might appear in the root of a volume
.DocumentRevisions-V100
.fseventsd
.Spotlight-V100
.TemporaryItems
.Trashes
.VolumeIcon.icns
.com.apple.timemachine.donotpresent
# Directories potentially created on remote AFP share
.AppleDB
.AppleDesktop
Network Trash Folder
Temporary Items
.apdisk

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FROM golang:1.16-alpine AS builder
RUN apk update && apk add --no-cache git && apk add -U --no-cache ca-certificates
WORKDIR /app/
ADD go.mod go.sum ./
RUN go mod download
ADD . .
RUN GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -ldflags="-w -s" -o tank .
FROM scratch
WORKDIR /app/
COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
COPY --from=builder /app/tank /app/tank
ENTRYPOINT ["/app/tank"]

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MIT License Copyright (c) 2021 - present Marcus Noble
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is furnished
to do so, subject to the following conditions:
The above copyright notice and this permission notice (including the next
paragraph) shall be included in all copies or substantial portions of the
Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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.DEFAULT_GOAL := default
IMAGE ?= docker.cluster.fun/averagemarcus/tank:latest
.PHONY: test # Run all tests, linting and format checks
test: lint check-format run-tests
.PHONY: lint # Perform lint checks against code
lint:
@go vet && golint -set_exit_status ./...
.PHONY: check-format # Checks code formatting and returns a non-zero exit code if formatting errors found
check-format:
@gofmt -e -l .
.PHONY: format # Performs automatic format fixes on all code
format:
@gofmt -s -w .
.PHONY: run-tests # Runs all tests
run-tests:
@echo "⚠️ 'run-tests' unimplemented"
.PHONY: fetch-deps # Fetch all project dependencies
fetch-deps:
@go mod tidy
.PHONY: build # Build the project
build: lint check-format fetch-deps
@go build -o tank main.go
.PHONY: docker-build # Build the docker image
docker-build:
@docker build -t $(IMAGE) .
.PHONY: docker-publish # Push the docker image to the remote registry
docker-publish:
@docker push $(IMAGE)
.PHONY: run # Run the application
run:
@go run .
.PHONY: ci # Perform CI specific tasks to perform on a pull request
ci:
@echo "⚠️ 'ci' unimplemented"
.PHONY: release # Release the latest version of the application
release:
@kubectl --namespace opengraph set image deployment opengraph web=docker.cluster.fun/averagemarcus/tank:$(SHA)
.PHONY: help # Show this list of commands
help:
@echo "tank"
@echo "Usage: make [target]"
@echo ""
@echo "target description" | expand -t20
@echo "-----------------------------------"
@grep '^.PHONY: .* #' Makefile | sed 's/\.PHONY: \(.*\) # \(.*\)/\1 \2/' | expand -t20
default: test build

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# Tank
A webhook handler to send messages to a Matrix homeserver.
## Example
```sh
curl -X "POST" "http://localhost:3000/" \
-H 'Content-Type: application/json; charset=utf-8' \
-d $'{
"message": "Test webhook",
"type": "text",
"roomID": "example"
}'
```
## Features
* Send text messages to a room
* Send notice messages to a room
## Building from source
With Docker:
```sh
make docker-build
```
Standalone:
```sh
make build
```
## Contributing
If you find a bug or have an idea for a new feature please [raise an issue](issues/new) to discuss it.
Pull requests are welcomed but please try and follow similar code style as the rest of the project and ensure all tests and code checkers are passing.
Thank you 💛
## License
See [LICENSE](LICENSE)

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module github.com/AverageMarcus/tank
go 1.16
require (
github.com/gofiber/fiber/v2 v2.14.0
maunium.net/go/mautrix v0.9.14
)

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package main
import (
"fmt"
"os"
"strings"
"github.com/gofiber/fiber/v2"
"maunium.net/go/mautrix"
"maunium.net/go/mautrix/id"
)
var (
matrixClient *mautrix.Client
defaultRoom *string
port = "3000"
)
func init() {
homeserverURL, ok := os.LookupEnv("HOMESERVER_URL")
if !ok {
panic("HOMESERVER_URL env var required")
}
userID, ok := os.LookupEnv("USER_ID")
if !ok {
panic("USER_ID env var required")
} else {
userID = strings.Replace(userID, homeserverURL, "", -1)
userID = strings.TrimPrefix(userID, "@")
}
accessToken, ok := os.LookupEnv("ACCESS_TOKEN")
if !ok {
panic("ACCESS_TOKEN env var required")
}
if p, ok := os.LookupEnv("PORT"); ok {
port = p
}
room, ok := os.LookupEnv("DEFAULT_ROOM")
if ok {
defaultRoom = &room
}
client, err := mautrix.NewClient(homeserverURL, id.NewUserID(userID, homeserverURL), accessToken)
if err != nil {
panic(err)
}
matrixClient = client
}
func main() {
app := fiber.New()
app.Post("/", HandlePayloadPost)
app.Listen(fmt.Sprintf(":%s", port))
}
func HandlePayloadPost(c *fiber.Ctx) error {
payload := Payload{}
if err := c.BodyParser(&payload); err != nil {
return err
}
if err := payload.Validate(defaultRoom); err != nil {
fmt.Println("Invalid payload - ", err)
return c.Status(fiber.StatusBadRequest).SendString(err.Error())
}
switch payload.Type {
case PayloadTypeText:
_, err := matrixClient.SendText(id.RoomID(payload.RoomID), payload.Message)
if err != nil {
if httpErr, ok := err.(mautrix.HTTPError); ok {
return c.Status(httpErr.Response.StatusCode).SendString(httpErr.RespError.Err)
}
return fiber.ErrInternalServerError
}
case PayloadTypeNotice:
_, err := matrixClient.SendNotice(id.RoomID(payload.RoomID), payload.Message)
if err != nil {
if httpErr, ok := err.(mautrix.HTTPError); ok {
return c.Status(httpErr.Response.StatusCode).SendString(httpErr.RespError.Err)
}
return fiber.ErrInternalServerError
}
}
return c.SendStatus(fiber.StatusOK)
}

82
payload.go Normal file
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@ -0,0 +1,82 @@
package main
import (
"errors"
"fmt"
"strings"
"maunium.net/go/mautrix/id"
)
type PayloadType string
const (
PayloadTypeText PayloadType = "text"
PayloadTypeNotice PayloadType = "notice"
)
type Payload struct {
Type PayloadType `json:"type"`
Message string `json:"message"`
RoomID string `json:"roomID"`
}
func (p *Payload) Validate(defaultRoom *string) error {
if p.Type == "" {
p.Type = PayloadTypeText
}
if p.RoomID == "" && defaultRoom != nil {
p.RoomID = *defaultRoom
}
if p.Message == "" {
return errors.New("'message' is required")
}
if p.RoomID == "" {
return errors.New("'roomID' is required")
}
room := parseRoom(p.RoomID)
if strings.HasPrefix(room, "#") || !strings.HasPrefix("!", room) {
if !strings.HasPrefix(room, "#") {
room = fmt.Sprintf("#%s", room)
}
resp, err := matrixClient.ResolveAlias(id.RoomAlias(room))
if err == nil {
p.RoomID = resp.RoomID.String()
} else {
p.RoomID = strings.Replace(room, "#", "!", 1)
}
}
return nil
}
func parseRoom(room string) string {
prefix := ""
local := ""
domain := ""
parts := strings.Split(room, ":")
if len(parts) == 2 {
domain = parts[1]
} else {
domain = matrixClient.HomeserverURL.Host
}
if strings.HasPrefix(parts[0], "!") {
prefix = "!"
parts[0] = strings.TrimPrefix(parts[0], "!")
}
if strings.HasPrefix(parts[0], "#") {
prefix = "#"
parts[0] = strings.TrimPrefix(parts[0], "#")
}
local = parts[0]
return fmt.Sprintf("%s%s:%s", prefix, local, domain)
}