pylresolv 0.2

Most common usage

from pylresolv import ns_parse, ns_type, res_query

answer = res_query('gmail.com', rr_type=ns_type.ns_t_mx)
ret = ns_parse(answer, handler=ns_type.handle_t_mx)
print(ret)

Will produce a list of RR objects:

[RR<ns_type.ns_t_mx: 15>((40, u'alt4.gmail-smtp-in.l.google.com')),
 RR<ns_type.ns_t_mx: 15>((30, u'alt3.gmail-smtp-in.l.google.com')),
 RR<ns_type.ns_t_mx: 15>((10, u'alt1.gmail-smtp-in.l.google.com')),
 RR<ns_type.ns_t_mx: 15>((20, u'alt2.gmail-smtp-in.l.google.com')),
 RR<ns_type.ns_t_mx: 15>((5, u'gmail-smtp-in.l.google.com'))]

Example from main:

from pprint import pprint
queries = (
    ('gmail.com', ns_type.ns_t_ns),
    ('gmail.com', ns_type.ns_t_a),
    ('gmail.com', ns_type.ns_t_mx),
    ('gmail.com', ns_type.ns_t_txt),
    ('www.gmail.com', ns_type.ns_t_cname),
)
for qhost, qtype in queries:
    print('Querying host {!r} type {!r}:'.format(qhost, qtype))
    answer = res_query(qhost, rr_type=qtype)
    ret = ns_parse(answer)
    # ret = ns_parse(answer, handler=ns_type.handle_t_mx)
    # ret = ns_parse(answer, handler=ns_type.handle_bin)
    pprint([rr.contents for rr in ret])
    print()

Produces:

Querying host 'gmail.com' type <ns_type.ns_t_ns: 2>:
['ns2.google.com', 'ns4.google.com', 'ns3.google.com', 'ns1.google.com']

Querying host 'gmail.com' type <ns_type.ns_t_a: 1>:
[bytearray(b'\xac\xd9\x11e')]

Querying host 'gmail.com' type <ns_type.ns_t_mx: 15>:
[(40, 'alt4.gmail-smtp-in.l.google.com'),
 (30, 'alt3.gmail-smtp-in.l.google.com'),
 (10, 'alt1.gmail-smtp-in.l.google.com'),
 (20, 'alt2.gmail-smtp-in.l.google.com'),
 (5, 'gmail-smtp-in.l.google.com')]

Querying host 'gmail.com' type <ns_type.ns_t_txt: 16>:
['globalsign-smime-dv=CDYX+XFHUw2wml6/Gb8+59BsH31KzUr6c1l2BPvqKX8=',
 'v=spf1 redirect=_spf.google.com']

Querying host 'www.gmail.com' type <ns_type.ns_t_cname: 5>:
['mail.google.com']

Copyright

Copyright 2019, Walter Doekes (OSSO B.V.)

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.