40 lines
1002 B
ReStructuredText
40 lines
1002 B
ReStructuredText
.. _example_asynch:
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Asynchronous lookup
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===================
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This example performs the name lookup in the background.
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The main program keeps running while the name is resolved.
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Source code
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-----------
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::
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#!/usr/bin/python
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import time
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import unbound
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ctx = unbound.ub_ctx()
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ctx.resolvconf("/etc/resolv.conf")
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def call_back(my_data,status,result):
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print "Call_back:", my_data
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if status == 0 and result.havedata:
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print "Result:", result.data.address_list
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my_data['done_flag'] = True
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my_data = {'done_flag':False,'arbitrary':"object"}
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status, async_id = ctx.resolve_async("www.seznam.cz", my_data, call_back, unbound.RR_TYPE_A, unbound.RR_CLASS_IN)
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while (status == 0) and (not my_data['done_flag']):
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status = ctx.process()
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time.sleep(0.1)
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if (status != 0):
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print "Resolve error:", unbound.ub_strerror(status)
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The :meth:`unbound.ub_ctx.resolve_async` method is able to pass on any Python
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object. In this example, we used a dictionary object ``my_data``.
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