Serilog.Sinks.Telegram

Writes Serilog events to a given Telegram chat being it a private chat or a group.

Install

Install-Package Serilog.Sinks.Telegram

Note that a Telegram bot api key is required in order to configure the sink, if you don't know how the bot creation process works please refer to the official documentation.

Configuration

To configure the sink simply add "TeleSink" using the "WriteTo" method on the Serilog logger configuration.

new LoggerConfiguration()
   .MinimumLevel.Information()
   .WriteTo.TeleSink(
      telegramApiKey:"my-bot-api-key",
      telegramChatId:"the target chat id")
   .CreateLogger();

Optionally a minimum log level can be specified:

new LoggerConfiguration()
   .MinimumLevel.Information()
   .WriteTo.TeleSink(
      telegramApiKey:"my-bot-api-key",
      telegramChatId:"the target chat id",
      minimumLevel:LogEventLevel.Warning)
   .CreateLogger();

Q.A.

How do i discover the chat id parameter?

Once your bot is created simply open a chat towards it (or include it into a group), then you can use the Telegram API to get the last updates for your bot:

curl -X GET \
  https://api.telegram.org/bot<my-bot-api-key>/getUpdates \
  -H 'Cache-Control: no-cache'

The response should report the last conversations your bot had along with their chat ids:

{
    "ok": true,
    "result": [
        {
            "update_id": 123456789,
            "message": {
                "message_id": 2,
                "from": {
                    "id": 000000,
                    "is_bot": false,
                    "first_name": "XXX",
                    "last_name": "XXX",
                    "username": "XXX",
                    "language_code": "XX"
                },
                "chat": {
                    "id": 0000000,
                    "first_name": "XXX",
                    "last_name": "XXX",
                    "username": "XXX",
                    "type": "private"
                },
                "date": 1531306919,
                "text": "hello dear bot!"
            }
        }
    ]
}

How can i run unit tests?

You need an api key and a chat id in order to run the unit tests. You can add them to the Configuration/TestConfig.json config file or (better solution) you can add another config file named /Configuration/TestConfig_private.json and use it to store you secrets. This is the preferred solution if you want to make a pull request or fork & push the code to another repo since that path is already ignored.