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Simple DNS resolver for asyncio

Project description

Simple DNS resolver for asyncio

.. image::

aiodns provides a simple way for doing asynchronous DNS resolutions using `pycares <>`_.



import asyncio
import aiodns

loop = asyncio.get_event_loop()
resolver = aiodns.DNSResolver(loop=loop)

async def query(name, query_type):
return await resolver.query(name, query_type)

coro = query('', 'A')
result = loop.run_until_complete(coro)

The following query types are supported: A, AAAA, ANY, CNAME, MX, NAPTR, NS, PTR, SOA, SRV, TXT.


The API is pretty simple, three functions are provided in the ``DNSResolver`` class:

* ``query(host, type)``: Do a DNS resolution of the given type for the given hostname. It returns an
instance of ``asyncio.Future``. The actual result of the DNS query is taken directly from pycares.
As of version 1.0.0 of aiodns (and pycares, for that matter) results are always namedtuple-like
objects with different attributes. Please check `the documentation <>`_
for the result fields.
* ``gethostbyname(host, socket_family)``: Do a DNS resolution for the given
hostname and the desired type of address family (i.e. ``socket.AF_INET``).
While ``query()`` always performs a request to a DNS server,
``gethostbyname()`` first looks into ``/etc/hosts`` and thus can resolve
local hostnames (such as ``localhost``). Please check `the documentation
for the result fields. The actual result of the call is a ``asyncio.Future``.
* ``gethostbyaddr(name)``: Make a reverse lookup for an address.
* ``cancel()``: Cancel all pending DNS queries. All futures will get ``DNSError`` exception set, with

Running the test suite

To run the test suite: ``python``


Saúl Ibarra Corretgé <>


aiodns uses the MIT license, check LICENSE file.

Python versions

Python >= 3.5 are supported.


If you'd like to contribute, fork the project, make a patch and send a pull
request. Have a look at the surrounding code and please, make yours look
alike :-)

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