What is it?

If you wanna use Telegram API on a server that can't access it, mainly because of being banned by Telegram or the country itself blocking Telegram from inside, like Iran, you can use Cloudflare workers as something like a proxy to send and receive requests from the API for free.

Example

In the worker.js file you can find a simple script that gets the text from the url parameter and sends it to a Telegram user.

What do you need to start?

• Create a Bot in Telegram using the https://t.me/BotFather; You need the Bot's TOKEN, and the User's CHAT_ID.
• Create a free Cloudflare account.

How to do it?

• Create a worker in the Cloudflare dashboard, name it whatever you want, and paste the code from worker.js file into worker.js file in the cloudflare's worker.
• Change the TOKEN and CHAT_ID with your data, you can either put them directly in the script or use an environment variable.
• Deploy the worker and get the its url.
• Now you should be able to send a message to the user by using the text parameter after the url;
  EX: https://my-worker-name.workers.dev/?text=hi mom!.

Automate it in an actuall application

So I'm going to use Django to send the admin a message when a user create an account.

...
### acount has been created
worker_url = 'https://my-worker-name.workers.dev/'
text = 'hi mom, someone just created a new account!'
try:
  response = requests.get(f'{worker_url}?text={text}')
  return JsonResponse(response.json(), status=response.status_code)
except requests.RequestException as e:
  return JsonResponse({'error': str(e)}, status=500)
...

Don't forget to install "requests" by pip install requests, and import both from django.http import JsonResponse and import requests

Here's a more beginner friendly way of explaning everything https://unixnexo.github.io/src/blog/Using_Telegram_API_even_if_the_host_doesn't_let_you_to.html