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snkarnam / adns-python

Automatically exported from code.google.com/p/adns-python
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Build Instructions

First, you gotta have the adns_ libraries installed somewhere. Maybe your OS vendor has it packaged already.

.. _adns: http://www.chiark.greenend.org.uk/~ian/adns/

For adns-python-1.2.0 and newer, you must have at least adns-1.2.

Second, you gotta have Distutils_, which comes in Python 1.6 and up. If you have Python 1.5.2, upgrade already!

.. _Distutils: http://www.python.org/sigs/distutils-sig/download.html

Then, you can build and install::

$ python setup.py build
# python setup.py install # this is as root; use su or sudo

Other useful things::

$ python setup.py bdist # make a binary distribution
$ python setup.py bdist_rpm # make an RPM

RTFM for Distutils for more options.

Usage

See the included test programs for examples. A simple interactive example that uses synchronous queries::

>>> import adns
>>> s=adns.init()
>>> s.synchronous('python.org',adns.rr.MX)
(0, None, 1107034862, ((50, ('mail.python.org', 0,
((2, '194.109.207.14'),))),))

Results are generally returned as a 4-tuple: status, CNAME, expires, answer

status is the adns status, enumerated in adns.status.

CNAME is the CNAME of the answer, if any (None if the query target is not a CNAME)

expires is the time (in ticks) that the answer's TTL expires.

answer is what you really want. Since queries generally can return more than one answer, answer is returned as an n-tuple. The format of each item in the tuple depends on what type of RR was requested.::

>>> s.synchronous('python.org',adns.rr.MXraw)
(0, None, 1107034862, ((50, 'mail.python.org'),))

In this case, MXraw returns only the MX data (priority and hostname). MX does further expansions upon the hostname, returning a tuple of hostname, status for the following data, and then a tuple of rr.ADDR answers, which are the address class and the IP address, i.e.::

>>> s.synchronous('mail.python.org',adns.rr.ADDR)
(0, None, 1107034862, ((2, '194.109.207.14'),))

and compare to::

>>> s.synchronous('mail.python.org',adns.rr.A)
(0, None, 1107034862, ('194.109.207.14',))

Prefer to use exceptions to processing status codes? adns.exception(status) will raise an appropriate exception. Sometimes you need to have the result, even when there is an exceptional condition. The exceptions are:

For asynchronous examples, see ADNS.py, hostmx.py, and DNSBL.py. DNSBL.py is very outdated in terms of actual working blacklists, but may still be instructive.

adns-python-1.2.0 and newer requires at least adns-1.2. For adns-1.1 and older, use adns-python-1.1.1.

:Author: Andy Dustman farcepest@gmail.com :Date: January 27, 2007