Sample Telegram Bot.

• /mychatid: returns the user chat id if sent directly or, if sent from a group, the group id

Can be extended to implement other commands.

• Deploy the application / Docker container online (it must be available on https)
• Create a new Bot using BotFather, using the command /newbot and take note of your token
• Add the available commands using the BotFather command /setcommands, sending a content like the one below

mychatid - Send me back the chat id / group id

• Set a webhook POSTing the payload below to https://api.telegram.org/bot<your bot token>/setWebhook

{
  "url": "https://<server><path>"
}

• to get a chat id:
  • write directly to your bot
  • you can now delete the chat with your bot (optional)
• to get a group id:
  • create a group, including your bot
  • send a message /mychatid@<your bot> within the group
  • you can now remove your bot from the group (optional)

You can export the following environment variables, to customize the bot:

• HTTP_PORT: http port to listen to. Defaults to 8080.
• ENDPOINT: url path invoked by Telegram webhooks. Must be the same <path> used in setWebhook. Defaults to '/'.

Listening on https://<your server>:8080

docker run -p 8080:8080 paolodenti/chatidbot

Listening on https://<your server>:443/mysecretpath

docker run -p 443:8888 -e HTTP_PORT=8888 -e ENDPOINT="/mysecretpath" paolodenti/chatidbot