unbound/libunbound/python/examples/dns-lookup.py

   1 #!/usr/bin/python
   2 '''
   3  dns-lookup.py : This example shows how to resolve IP address
   4
   5  Authors: Zdenek Vasicek (vasicek AT fit.vutbr.cz)
   6           Marek Vavrusa  (xvavru00 AT stud.fit.vutbr.cz)
   7
   8  Copyright (c) 2008. All rights reserved.
   9
  10  This software is open source.
  11
  12  Redistribution and use in source and binary forms, with or without
  13  modification, are permitted provided that the following conditions
  14  are met:
  15
  16  Redistributions of source code must retain the above copyright notice,
  17  this list of conditions and the following disclaimer.
  18
  19  Redistributions in binary form must reproduce the above copyright notice,
  20  this list of conditions and the following disclaimer in the documentation
  21  and/or other materials provided with the distribution.
  22
  23  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  25  TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  26  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  27  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  28  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  29  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  30  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  31  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  32  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  33  POSSIBILITY OF SUCH DAMAGE.
  34 '''
  35 import unbound
  36
  37 ctx = unbound.ub_ctx()
  38 ctx.resolvconf("/etc/resolv.conf")
  39
  40 status, result = ctx.resolve("www.nic.cz", unbound.RR_TYPE_A, unbound.RR_CLASS_IN)
  41 if status == 0 and result.havedata:
  42     print("Result:", result.data.address_list)
  43 elif status != 0:
  44     print("Error:", unbound.ub_strerror(status))