SystemError resolving TXT record

Question

SystemError resolving TXT record

pin3da opened this issue 7 years ago · comments

Hello, I was resolving DNS records for some domains and I found an unexpected error resolving the TXT record of like.com.sa

Here is a code to reproduce the error

import asyncio
import aiodns

loop = asyncio.get_event_loop()
resolver = aiodns.DNSResolver(loop=loop)
result = loop.run_until_complete(resolver.query('like.com.sa', 'TXT'))
print(result)

Thanks

Saúl Ibarra Corretgé commented 7 years ago

Thanks!

Saúl Ibarra Corretgé · Answer 1 · Tue Jul 18 2017 00:48:17 GMT+0800 (China Standard Time)

What error do you get?

Manuel Pineda · Answer 2 · Tue Jul 18 2017 00:53:23 GMT+0800 (China Standard Time)

Exception ignored in: functools.partial(<function DNSResolver._callback at 0x7fc615986950>, <Future pending cb=[_run_until_complete_cb() at /usr/local/lib/python3.6/asyncio/base_events.py:176]>)
Traceback (most recent call last):
  File "/home/pin3da/py-envs/py36-discovery/lib/python3.6/site-packages/aiodns/__init__.py", line 56, in _callback
    if fut.cancelled():
SystemError: <built-in method cancelled of _asyncio.Future object at 0x7fc615ebbcf8> returned a result with an error set

Saúl Ibarra Corretgé · Answer 3 · Tue Jul 18 2017 15:24:01 GMT+0800 (China Standard Time)

Hi there! I could reproduce it. It seems to only happen with that domain, as tests pass. I'll take a look as soon as I can!

Saúl Ibarra Corretgé · Answer 4 · Tue Jul 18 2017 15:27:05 GMT+0800 (China Standard Time)

I think the problem is in pycares.

Manuel Pineda · Answer 5 · Tue Jul 18 2017 20:57:08 GMT+0800 (China Standard Time)

I found another domain which causes the same problem (maybe helps to see what happens):

wide.com.es

Saúl Ibarra Corretgé · Answer 6 · Thu Jul 20 2017 06:11:48 GMT+0800 (China Standard Time)

This should fix it: saghul/pycares#57

Saúl Ibarra Corretgé · Answer 7 · Thu Jul 20 2017 07:23:31 GMT+0800 (China Standard Time)

Tests pass, this will be part of the next pycares release. You can alternatively install pycares from master in the meantime. Cheers!

Manuel Pineda · Answer 8 · Thu Jul 20 2017 09:47:06 GMT+0800 (China Standard Time)

It's working now, thank you very much !

Steven Pineda · Answer 9 · Wed Jan 31 2018 22:08:30 GMT+0800 (China Standard Time)

Hi, I have the exact problem just with another domain and MX:

import asyncio
import aiodns

loop = asyncio.get_event_loop()
resolver = aiodns.DNSResolver(loop=loop)
result = loop.run_until_complete(resolver.query('xn--cardeosapeluqueros-r0b.com', 'MX'))
print(result)

I get
Exception ignored in: functools.partial(<function DNSResolver._callback at 0x7fc89b406ea0>, <Future pending cb=[_run_until_complete_cb() at /usr/local/lib/python3.6/asyncio/base_events.py:176]>) Traceback (most recent call last): File "/home/steven/Envs/vPandapipe/lib/python3.6/site-packages/aiodns/__init__.py", line 56, in _callback if fut.cancelled(): SystemError: <built-in method cancelled of _asyncio.Future object at 0x7fc89bb3b828> returned a result with an error set

I'm using aiodns 1.1.1 and pycares 2.3.0. Should I create a new issue?

Steven Pineda · Answer 10 · Wed Jan 31 2018 22:17:42 GMT+0800 (China Standard Time)

Doing a ns lookup I found this for MX:
Non-authoritative answer: xn--cardeosapeluqueros-r0b.com mail exchanger = 10 carde\241osapeluqueros.com.
Maybe it's the special character "\241"?

Found another case with SOA for ayesas.com. Its record also contains a special character:

ayesas.com
	origin = ns2.3c1b.com
	mail addr = adm\253n.domain.com
	serial = 2015010244
	refresh = 3600
	retry = 600
	expire = 1209600
	minimum = 3600

I think the origin of the problem is different so I'm creating a new issue.