SystemError when record contains special characters. about aiodns

[saghul]

Almost a year later... I'm preparing a new pycares release here: saghul/pycares#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 :-)

[saghul]

Hi there! Yep, I see the issue. Looks like a fix is need in pycares. This makes me wonder where else we could find such chars, so a big change, returning bytes everywhere sounds about the right thing to do...

FTR:

dig mx xn--cardeosapeluqueros-r0b.com

; <<>> DiG 9.9.7-P3 <<>> mx xn--cardeosapeluqueros-r0b.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2315
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;xn--cardeosapeluqueros-r0b.com.	IN	MX

;; ANSWER SECTION:
xn--cardeosapeluqueros-r0b.com.	900 IN	MX	10 carde\241osapeluqueros.com.

;; Query time: 93 msec
;; SERVER: 10.53.53.53#53(10.53.53.53)
;; WHEN: Wed Jan 31 16:13:49 CET 2018
;; MSG SIZE  rcvd: 95

dig soa ayesas.com

; <<>> DiG 9.9.7-P3 <<>> soa ayesas.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 56952
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;ayesas.com.			IN	SOA

;; ANSWER SECTION:
ayesas.com.		3600	IN	SOA	ns2.3c1b.com. adm\253n.domain.com. 2015010244 3600 600 1209600 3600

;; Query time: 127 msec
;; SERVER: 10.53.53.53#53(10.53.53.53)
;; WHEN: Wed Jan 31 16:14:29 CET 2018
;; MSG SIZE  rcvd: 97

Are you up for writing a patch?

[steven2308]

Sadly I'm not familiar with CPython and not even with C. I don't think I'm suitable for such change.

[saghul]

That's ok, but that means you'll need to wait until I find the time to solve this all across the library.

[steven2308]

I understand, we have found some hacky workaround while it happens. Thanks for your time!

[saghul]

This is not fixed in the ongoing V2 PR: #54 which depends on the new pycares 3.