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('google.com', '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 ofasyncio.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
). Whilequery()
always performs a request to a DNS server,gethostbyname()
first looks into/etc/hosts
and thus can resolve local hostnames (such aslocalhost
). Please check the documentation for the result fields. The actual result of the call is aasyncio.Future
.gethostbyaddr(name)
: Make a reverse lookup for an address.cancel()
: Cancel all pending DNS queries. All futures will getDNSError
exception set, withARES_ECANCELLED
errno.
To run the test suite: python tests.py
Saúl Ibarra Corretgé <[email protected]>
aiodns uses the MIT license, check LICENSE file.
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 :-)