How to connect to .onion sites using python aiohttp? - python-3.x

Question

I am trying to connect to a .onion site using python. I have tor running on port 9050 and I am getting the following error:
Traceback (most recent call last):
File "/Users/jane/code/test/test.py", line 15, in main
res = await fetch(session, id)
File "/Users/jane/code/test/test.py", line 9, in fetch
async with session.get(url) as res:
File "/usr/local/lib/python3.7/site-packages/aiohttp/client.py", line 1005, in __aenter__
self._resp = await self._coro
File "/usr/local/lib/python3.7/site-packages/aiohttp/client.py", line 476, in _request
timeout=real_timeout
File "/usr/local/lib/python3.7/site-packages/aiohttp/connector.py", line 522, in connect
proto = await self._create_connection(req, traces, timeout)
File "/usr/local/lib/python3.7/site-packages/aiohttp/connector.py", line 854, in _create_connection
req, traces, timeout)
File "/usr/local/lib/python3.7/site-packages/aiohttp/connector.py", line 959, in _create_direct_connection
raise ClientConnectorError(req.connection_key, exc) from exc
aiohttp.client_exceptions.ClientConnectorError: Cannot connect to host intelex7ny6coqno.onion:80 ssl:None [nodename nor servname provided, or not known]
The code:
import asyncio
import aiohttp
from aiohttp_socks import SocksConnector
async def fetch(session, id):
print('Starting {}'.format(id))
url = 'http://intelex7ny6coqno.onion/topic/{}'.format(id)
async with session.get(url) as res:
return res.text
async def main(id):
connector = SocksConnector.from_url('socks5://localhost:9050')
async with aiohttp.ClientSession(connector=connector) as session:
res = await fetch(session, id)
print(res)
if __name__ == '__main__':
ids = ['10', '11', '12']
loop = asyncio.get_event_loop()
future = [asyncio.ensure_future(main(id)) for id in ids]
loop.run_until_complete(asyncio.wait(future))
This code works fine:
import requests
session = requests.session()
session.proxies['http'] = 'socks5h://localhost:9050'
session.proxies['https'] = 'socks5h://localhost:9050'
headers = {
'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; rv:60.0) Gecko/20100101 Firefox/60.0',
'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
}
res = session.get(url, headers=headers)
print(res)
Why am I getting Cannot connect to host intelex7ny6coqno.onion:80 ssl:None [nodename nor servname provided, or not known]?
What am I missing here?

Answer 1

By default it appears to be using the local DNS resolver to asynchronously resolve hostnames. When using requests socks5h you are getting DNS resolution over SOCKS (Tor).
Adding rdns=True appears to work for .onion addresses:
connector = SocksConnector.from_url('socks5://localhost:9050', rdns=True)