A Telegram bot which translates push messages sent as simple HTTP calls into Telegram messages you can subscribe to.
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README.md

telegram-middleman-bot

Say thanks

I'm the @MiddleMan bot! I sit in the middle between whatever you want to send yourself as a message and your Telegram.

I translate simple JSON HTTP requests into Telegram push messages that you will get on your Smartphone, PC or whatever Telegram client you have.

Buy me a coffee

What's new (2018-02-05) ?

  • Reacting to non-200 status codes from Telegram API
  • Message rate limitation per recipient (--rateLimit parameter). On my hosted instance, this is set to 10 req / hour / recipient from now on.

Why might this be useful?

This is especially useful for developers or sysadmins. Imagine you want some kind of reporting from your application or server, like a daily report including some statistics. You don't want to actively look it up on a website but you want to receive it in a passive fashion. Just like getting an e-mail. But come on, let's be honest. E-Mails are so 2010. And they require your little server-side script to include some SMTP library and connect to a mail server. That's too heavyweight just to get some short information. Personally, I have a Python script running on my server which gathers some statistics from log files and databases and regularly sends me a Telegram message.

If you develop those thoughts further, this could potentially replace any kind of e-mail notifications - be it the message that someone has answered to your forum post, your favorite game is now on sale at Steam, and so on. It's lightweight and easy, unlike e-mails that have way too much overhead.

How to run it?

You can either set up your own instance or use mine, which is running at http://middleman.ferdinand-muetsch.de. The hosted instance only allows for a maxmimum of 240 requests per recipient per day. If you want to set this up on your own, do the following. You can either run the bot in long-polling- or webhook mode. For production use the latter option is recommended for various reasons. However, you'll need a server with a static IP and s (self-signed) SSL certificate.

  1. Make sure u have the latest version of Go installed.
  2. go get github.com/n1try/telegram-middleman-bot
  3. cd <YOUR_GO_WORKSPACE_PATH>/src/github.com/n1try/telegram-middleman-bot
  4. go get ./...
  5. go build .

Using long-polling mode

  1. ./telegram-middleman-bot --token <TOKEN_YOU_GOT_FROM_BOTFATHER> --port 8080 (of course you can use a different port)

Using webhook mode

  1. If you don't have an official, verified certificate, create one doing openssl req -newkey rsa:2048 -sha256 -nodes -keyout middleman.key -x509 -days 365 -out middleman.pem (the CN must match your server's IP address)
  2. Tell Telegram to use webhooks to send updates to your bot. curl -F "url=https://<YOUR_DOMAIN_OR_IP>/api/updates" -F "certificate=@<YOUR_CERTS_PATH>.pem" https://api.telegram.org/bot<TOKEN_YOU_GOT_FROM_BOTFATHER>/setWebhook
  3. ./telegram-middleman-bot --token <TOKEN_YOU_GOT_FROM_BOTFATHER> --mode webhook --certPath middleman.pem --keyPath middleman.key --port 8443 --useHttps (of course you can use a different port)

Alternatively, you can also use a reverse proxy like nginx or Caddy to handle encryption. In that case you would set the mode to webhook, but useHttps to false and your bot wouldn't need any certificate.

Additional parameters

  • --rateLimit (int) - Maximum number of messages to be delivered to each recipient per hour. Defaults to 10.

How to use it?

  1. You need to get a token from the bot. Send a message with /start to the @MiddleManBot therefore.
  2. Now you can use that token to make HTTP POST requests to http://localhost:8080/api/messages (replace localhost by the hostname of your server running the bot or mine as shown above) with a body that looks like this.
{
	"recipient_token": "3edf633a-eab0-45ea-9721-16c07bb8f245",
	"text": "__Hello World!__ (yes, this is Markdown)",
	"origin": "My lonely server script"
}

License

MIT @ Ferdinand Mütsch