DNS query against a specific server.

[Michel Albert]

On Monday, 30 September 2013 14:54:41 UTC+2, Ervin Hegedüs  wrote:
> Hello,
> 
> 
> 
> On Mon, Sep 30, 2013 at 04:42:29AM -0700, Michel Albert wrote:
> 
> > Hi,
> 
> > 
> 
> > ``socket.gethostbyname`` sends the DNS resolution query to the DNS server specified by the OS. Is there an easy way to send a query to a *different* server?
> 
> > 
> 
> > I see that twisted.names allows you to do this, but, having all of twisted as dependency to my project when all I need to do is a simple DNS query seems a bit extreme. I also found pydns, but that looks fairly outdated and unmaintained.
> 
> > 
> 
> > Is there not an actively maintained lightweight solution? If not, I will go with twisted.
> 
> > 
> 
> 
> 
> there is a dns modul for Python (I don't know is it part of
> 
> standard Python library or not), on most Linux distribution you
> 
> can find it, eg. in Debian it's called python-dnspython.
> 
> 
> 
> It can handle different nameserver, than OS knows - here is a
> 
> sample code:
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> 
> 
> 
> 
> import dns.resolver
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> 
> 
> r = dns.resolver.Resolver()
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> r.namerservers =  ['127.0.0.1']
> 
> # or any other IP, in my case I'm using PDNS, which have two
> 
> # parts: a recursor and a resolver; recursor allows requests only
> 
> # on localhost
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> 
> 
> mxservers = r.query("python.org", 'MX').response
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> 
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> 
> hth,
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> 
> 
> 
> 
> a.


Indeed, this looks much nicer than both twisted or pydns. I think I'll go with that one. Thanks a lot!