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Viewing changes to vendor/Twisted-10.0.0/doc/names/examples/dns-service.py

  • Committer: Jesse Andrews
  • Date: 2010-05-28 06:05:26 UTC
  • Revision ID: git-v1:bf6e6e718cdc7488e2da87b21e258ccc065fe499
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vendor/Twisted-10.0.0/doc/names/examples/dns-service.py
 
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#!/usr/bin/env python
 
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# Copyright (c) 2009 Twisted Matrix Laboratories.
 
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# See LICENSE for details.
 
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"""
 
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Sample app to lookup SRV records in DNS.
 
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"""
 
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from twisted.names import client
 
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from twisted.internet import reactor
 
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import sys
 
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def printAnswer((answers, auth, add)):
 
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    if not len(answers):
 
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        print 'No answers'
 
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    else:
 
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        print '\n'.join([str(x.payload) for x in answers])
 
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    reactor.stop()
 
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def printFailure(arg):
 
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    print "error: could not resolve:", arg
 
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    reactor.stop()
 
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try:
 
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    service, proto, domain = sys.argv[1:]
 
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except ValueError:
 
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    sys.stderr.write('%s: usage:\n' % sys.argv[0] +
 
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                     '  %s SERVICE PROTO DOMAIN\n' % sys.argv[0])
 
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    sys.exit(1)
 
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resolver = client.Resolver('/etc/resolv.conf')
 
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d = resolver.lookupService('_%s._%s.%s' % (service, proto, domain), [1])
 
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d.addCallbacks(printAnswer, printFailure)
 
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reactor.run()