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SystemError when record contains special characters.

See original GitHub issue

Hi, I have a very similar problem to this solved issue:

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 this error and the program hangs.

Exception ignored in: functools.partial(<function DNSResolver._callback at 0x7fe1067b2ea0>, <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 0x7fe106ee7828> returned a result with an error set

Looking further I found that this problem happens when the result of the query has special characters, Doing a ns lookup I found this for MX:

Non-authoritative answer:
 xn--cardeosapeluqueros-r0b.com mail exchanger = 10 carde\241osapeluqueros.com.

Querying SOA for ayesas.com. Its record also contains a special character:

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

I’m using aiodns 1.1.1 and pycares 2.3.0.

Thank you!

Issue Analytics

State:
Created 6 years ago
Comments:6 (4 by maintainers)

Top GitHub Comments

2reactions

saghulcommented, Jan 8, 2019

Almost a year later… I’m preparing a new pycares release here: https://github.com/saghul/pycares/pull/83 and then I’ll update this library to use it and this bug will be fixed.

I took the liberty of using your domain examples as tests 😃

0reactions

saghulcommented, Jan 17, 2019

This is not fixed in the ongoing V2 PR: https://github.com/saghul/aiodns/pull/54 which depends on the new pycares 3.