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I am writing a telegram bot on the aiogram framework. Everything was good when I run it, but today I am getting error,Cannot connect to host api.telegram.org:443 ssl:default I do not know what's problem.
I am using Ubuntu 20.04.2 LTS
Here is the full error

Traceback (most recent call last):
  File "/home/mirodil/.local/share/virtualenvs/allinone-kbyzCwMv/lib/python3.8/site-packages/aiohttp/connector.py", line 1154, in _create_direct_connection
    hosts = await asyncio.shield(host_resolved)
  File "/home/mirodil/.local/share/virtualenvs/allinone-kbyzCwMv/lib/python3.8/site-packages/aiohttp/connector.py", line 880, in _resolve_host
    addrs = await self._resolver.resolve(host, port, family=self._family)
  File "/home/mirodil/.local/share/virtualenvs/allinone-kbyzCwMv/lib/python3.8/site-packages/aiohttp/resolver.py", line 33, in resolve
    infos = await self._loop.getaddrinfo(
  File "/usr/lib/python3.8/asyncio/base_events.py", line 825, in getaddrinfo
    return await self.run_in_executor(
  File "/usr/lib/python3.8/concurrent/futures/thread.py", line 57, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/usr/lib/python3.8/socket.py", line 918, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno -3] Temporary failure in name resolution

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/mirodil/.local/share/virtualenvs/allinone-kbyzCwMv/lib/python3.8/site-packages/aiogram/bot/api.py", line 139, in make_request
    async with session.post(url, data=req, **kwargs) as response:
  File "/home/mirodil/.local/share/virtualenvs/allinone-kbyzCwMv/lib/python3.8/site-packages/aiohttp/client.py", line 1138, in __aenter__
    self._resp = await self._coro
  File "/home/mirodil/.local/share/virtualenvs/allinone-kbyzCwMv/lib/python3.8/site-packages/aiohttp/client.py", line 535, in _request
    conn = await self._connector.connect(
  File "/home/mirodil/.local/share/virtualenvs/allinone-kbyzCwMv/lib/python3.8/site-packages/aiohttp/connector.py", line 542, in connect
    proto = await self._create_connection(req, traces, timeout)
  File "/home/mirodil/.local/share/virtualenvs/allinone-kbyzCwMv/lib/python3.8/site-packages/aiohttp/connector.py", line 907, in _create_connection
    _, proto = await self._create_direct_connection(req, traces, timeout)
  File "/home/mirodil/.local/share/virtualenvs/allinone-kbyzCwMv/lib/python3.8/site-packages/aiohttp/connector.py", line 1166, in _create_direct_connection
    raise ClientConnectorError(req.connection_key, exc) from exc
aiohttp.client_exceptions.ClientConnectorError: Cannot connect to host api.telegram.org:443 ssl:default [Temporary failure in name resolution]

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "app.py", line 18, in <module>
    executor.start_polling(dp, on_startup=on_startup)
  File "/home/mirodil/.local/share/virtualenvs/allinone-kbyzCwMv/lib/python3.8/site-packages/aiogram/utils/executor.py", line 45, in start_polling
    executor.start_polling(
  File "/home/mirodil/.local/share/virtualenvs/allinone-kbyzCwMv/lib/python3.8/site-packages/aiogram/utils/executor.py", line 320, in start_polling
    loop.run_until_complete(self._startup_polling())
  File "/usr/lib/python3.8/asyncio/base_events.py", line 616, in run_until_complete
    return future.result()
  File "/home/mirodil/.local/share/virtualenvs/allinone-kbyzCwMv/lib/python3.8/site-packages/aiogram/utils/executor.py", line 372, in _startup_polling
    await self._welcome()
  File "/home/mirodil/.local/share/virtualenvs/allinone-kbyzCwMv/lib/python3.8/site-packages/aiogram/utils/executor.py", line 361, in _welcome
    user = await self.dispatcher.bot.me
  File "/home/mirodil/.local/share/virtualenvs/allinone-kbyzCwMv/lib/python3.8/site-packages/aiogram/bot/bot.py", line 30, in me
    setattr(self, '_me', await self.get_me())
  File "/home/mirodil/.local/share/virtualenvs/allinone-kbyzCwMv/lib/python3.8/site-packages/aiogram/bot/bot.py", line 228, in get_me
    result = await self.request(api.Methods.GET_ME, payload)
  File "/home/mirodil/.local/share/virtualenvs/allinone-kbyzCwMv/lib/python3.8/site-packages/aiogram/bot/base.py", line 231, in request
    return await api.make_request(await self.get_session(), self.server, self.__token, method, data, files,
  File "/home/mirodil/.local/share/virtualenvs/allinone-kbyzCwMv/lib/python3.8/site-packages/aiogram/bot/api.py", line 142, in make_request
    raise exceptions.NetworkError(f"aiohttp client throws an error: {e.__class__.__name__}: {e}")
aiogram.utils.exceptions.NetworkError: Aiohttp client throws an error: ClientConnectorError: Cannot connect to host api.telegram.org:443 ssl:default [Temporary failure in name resolution]
mirodil
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2 Answers2

2

I presume you are running your Python telegram bot script on PythonAnywhere. If this is true, ensure you have the proxy setup integrated in the bot instance:

bot = Bot(token='YOUR API TOKEN GOES HERE', proxy='http://proxy.server:3128')

If that has been setup and you still get the TLS-in-TLS-related error from PythonAnywhere:

  1. Tap consoles on the Menu option.
  2. Close the console in which your script is running.
  3. Run the script again.
Kyle F Hartzenberg
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OMMICANG
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1

Your base url should be https://api.telegram.org/, with that being said it is common to see ConnectionError and ReadTimeout during polling.

But, looking at the error socket.gaierror: [Errno -3] Temporary failure in name resolution there is an issue in getting the address info for the host. I'd start with ruling out any connection issues and then check your /etc/hosts file to see if there are any misconfigurations.

If neither works, try polling the API directly to see if the problem still exists.

FYI: Here is how I'm polling the API directly without any framework and never had a problem. https://github.com/thevickypedia/Jarvis/blob/master/modules/telegram/bot.py

Vignesh Rao
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