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Telepush

Send Telegram push notifications easily via HTTP


Description

A simple Telegram Bot to translate POST requests with JSON payload into Telegram push messages. Similar Gotify and ntfy.sh, except without an extra app. Useful for server monitoring, alerting, and anything else.

How to use?

Step 1: Get a token

Open Telegram, start a chat with the TelepushBot (or your own bot, respectively) and type /start to obtain a recipient token.

Step 2: Send messages

Messages are sent via POST to https://telepush.dev/api/[[inlets/<inlet_name>]|messages]/<recipient>.

curl -XPOST \
     -H 'Content-Type: application/json' \
     -d '{ "text": "*Hello World!* (yes, this is Markdown)" }' \
     'https://telepush.dev/api/messages/<recipient>'

When hosting your own instance, replace the URL respectively.

Message options

Key Type Description
text* string Actual message in plain text or Markdown format
origin string What will be shown as the sender of your message
type [TEXT, FILE] Message type, i.e. to send text or a file (default: TEXT)
file** base64 Base64-encoded file content
filename** string Name of the file to send
options object Additional options to pass
options.disable_link_previews bool Whether to show previews of links in the chat

* = required for type: TEXT, ** = required for type: FILE

More details to be found here.

How to run?

Option 1: telepush.dev

Simply use the official hosted instance. Rate-limited to 240 requests per recipient per day.

Option 2: Self-hosted

When hosting your own Telepush instance, you need to create a new bot with @BotFather first. As a result, you will get a token that you then pass to Telepush when starting the server (see below).

Option 2.1: With Docker

$ docker volume create telepush_data
$ docker run -d \
    -p 8080:8080 \
    -v telepush_data:/srv/data \
    --name telepush \
    ghcr.io/muety/telepush \
    -mode webhook \
    -token <YOUR_BOTFATHER_TOKEN>

Option 2.2: Compile from source

# Install
$ go install github.com/muety/telepush@latest

# Run (webhook mode)
$ ./telepush -token <YOUR_BOTFATHER_TOKEN> -mode webhook

Webhook vs. long-polling

You can either run the bot in long-polling- or webhook mode (-mode [webhook|poll]). For production use the latter option is recommended for various reasons. However, you'll need a server with a static IP and a TLS certificate.

More details about webhook setup can be found in Marvin's Marvellous Guide to All Things Webhook.

HTTPS

In webhook mode, Telegram requires your updates endpoint to use HTTPS. To enable such, either run Telepush behind a reverse proxy (like Caddy), that terminates TLS.

Or, let Telepush itself handle TLS. You'll need a certificate for this, so either get one from Let's Encrypt or create a self-signed one, then use -useHttps in combination with -certPath and -keyPath pointed to your certificate and private key files respectively.

For self-signed certificates, you'll need to pass your public key to Telegram's setWebhook method in addition, see these instructions.

Configuration options

  • -address (string) Network address (IPv4) to bind to. Defaults to 127.0.0.1.
  • -address6 (string) Network address (IPv6) to bind to. Defaults to ::1.
  • -disableIPv6 (bool) Whether to disable listening on both IPv4 and IPv6 interfaces. Defaults to false.
  • -port (int) TCP port to listen on. Defaults to 8080.
  • -proxy (string) Proxy connection string to be used for long-polling mode. Defaults to none.
  • -urlSecret (string) Random suffix to append to your updates route called by Telegram's servers to prevent spam. Defaults to none.
  • -useHttps (bool) Whether to use HTTPS. Defaults to false.
  • -certPath (string) Path of your SSL certificate when using webhook mode with useHttp. Default to none.
  • -keyPath (string) Path of your private SSL key when using webhook mode with useHttp. Default to none.
  • -dataDir (string) File system location where to store persistent data. Defaults to ..
  • -blacklist (string) Path to a user id blacklist file (send /help to get your id). Defaults to blacklist.txt.
  • -whitelist (string) Path to a user id whitelist file (send /help to get your id). Defaults to whitelist.txt.
  • -rateLimit (int) Maximum number of messages to be delivered to each recipient per hour. Defaults to 100.
  • -metrics (bool) Whether to expose Prometheus metrics under /metrics. Defaults to false.

When using the Docker image, you can alternatively set most of the above config options via environment variables (passed to docker run using -e), e.g. APP_USE_HTTPS=true, APP_CERT_PATH=/etc/telepush.crt, etc. For details, see entrypoint.sh.

Inlets

Inlets provide a mechanism to pre-process incoming data that comes in a format different from what is normally expected by the bot.

This is especially useful if data is sent by external, third-party applications which you cannot modify.

For instance, you might want to deliver alerts from Prometheus' Alertmanager as Telegram notifications. However, Alertmanager's webhook requests look much different from Telepush's default input format. To still make them fit, you can write an Inlet to massage the data accordingly.

To directly address an inlet, request https://telepush.dev/api/inlets/<inlet_name>. Note that /api/inlets/default is equivalent to /api/messages.

Following inlets are currently available:

Name Description Status
default Simply passes the request through without any changes
alertmanager Consumes Alertmanager webhook requests
webmentionio Accepts Webmention.io webhook requests to notify about a new Webmention of one of your articles
bitbucket Accepts Bitbucket webhook requests to notify about a pipeline status change

Further documentation about the individual inlets is available here.

Metrics

Fundamental Prometheus metrics are exposed under /metrics, if the -metrics flag gets passed. They include:

  • telepush_messages_total{origin="string", type="string"}
  • telepush_requests_total{success="string"}

Troubleshooting

Error: panic: template: pattern matches no files: *.tpl.html

When running Telepush as a single executable, you must not use dev mode unless Telepush's source code is located inside the same directory. Make sure to not pass -env dev in this case.

License

MIT @ Ferdinand M羹tsch