CODEWITHSUNDEEP
c#.nettelegram-bot
ZedZip
ZedZip

Reputation: 6488

Telegram bot: how to do self update?

I have a Telegram account and created Telegram bot to do some actions on remote machines. It works ok. I fixed some codes in the bot and want to update all bots on all computers?

I.e. the bot understands command "/update" but how to pass the new .exe from my computer to all bots and do self-update?

Upvotes: 0

Views: 542

Answers (2)

Johannes Kuhn
Johannes Kuhn

Reputation: 15172

I have also written such a bot with a self-update mechanism.

To Update the bot I just have to send the new .exe over Telegram, but any other method works fine.

Basically, I do the following:

  • Call getFile with the file_id to get the path.
  • Start a new Process with a different executable. In my case I also pass the URL of the file download.
  • Exit the old process.
  • The new process replaces the old executable and (re-)starts the bot.

On windows, you can't change a .exe while it is running.

Edit:

I run my bot as windows service, which makes things a bit more complicated, but also easier:

  • Before I exit the process, I tell the scm that the service has stopped.
  • After updating, I start the service again over the scm, not with CreateProcess.

If the bot runs as SYSTEM user, permissions/UAC are not a problem. Otherwise allow the service user to write the executable and start the process.

If you run the program from desktop, then UAC can be a problem: If run as admin, you are fine. Processes started inherit the admin access. If not run as admin... Well the user your bot runs on requires write access to the executable.

Upvotes: 1

anatol
anatol

Reputation: 1760

You need external script for cmd that will be run by your bot after getting "/update" command. This script should firstly stop your bot and replace .exe files and run new .exe file.

Upvotes: 1

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