4812f02dd0
bypassing the cache response stage and uniquifying mesh states. Four EDNS option lists were added to module_qstate (module_qstate.edns_opts_*) to store EDNS options from/to front/back side. - Added two flags to module_qstate (no_cache_lookup, no_cache_store) that control the modules' cache interactions. - Added code for registering inplace callback functions. The registered functions can be called just before replying with local data or Chaos, replying from cache, replying with SERVFAIL, replying with a resolved query, sending a query to a nameserver. The functions can inspect the available data and maybe change response/query related data (i.e. append EDNS options). - Updated Python module for the above. - Updated Python documentation. git-svn-id: https://unbound.nlnetlabs.nl/svn/trunk@3947 be551aaa-1e26-0410-a405-d3ace91eadb9
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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