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89 lines
3.4 KiB
Python
89 lines
3.4 KiB
Python
'''
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resmod.py: This example shows how to modify the response from iterator
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Copyright (c) 2009, Zdenek Vasicek (vasicek AT fit.vutbr.cz)
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Marek Vavrusa (xvavru00 AT stud.fit.vutbr.cz)
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This software is open source.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of the organization nor the names of its
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contributors may be used to endorse or promote products derived from this
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software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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'''
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def init(id, cfg): return True
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def deinit(id): return True
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def inform_super(id, qstate, superqstate, qdata): return True
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def setTTL(qstate, ttl):
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"""Updates return_msg TTL and the TTL of all the RRs"""
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if qstate.return_msg:
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qstate.return_msg.rep.ttl = ttl
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if (qstate.return_msg.rep):
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for i in range(0,qstate.return_msg.rep.rrset_count):
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d = qstate.return_msg.rep.rrsets[i].entry.data
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for j in range(0,d.count+d.rrsig_count):
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d.rr_ttl[j] = ttl
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def operate(id, event, qstate, qdata):
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if (event == MODULE_EVENT_NEW) or (event == MODULE_EVENT_PASS):
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#pass the query to validator
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qstate.ext_state[id] = MODULE_WAIT_MODULE
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return True
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if event == MODULE_EVENT_MODDONE:
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log_info("pythonmod: iterator module done")
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if not qstate.return_msg:
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qstate.ext_state[id] = MODULE_FINISHED
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return True
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#modify the response
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qdn = qstate.qinfo.qname_str
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if qdn.endswith(".nic.cz."):
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#invalidate response in cache added by iterator
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#invalidateQueryInCache(qstate, qstate.return_msg.qinfo)
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#modify TTL to 10 secs and store response in cache
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#setTTL(qstate, 5)
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#if not storeQueryInCache(qstate, qstate.return_msg.qinfo, qstate.return_msg.rep, 0):
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# qstate.ext_state[id] = MODULE_ERROR
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# return False
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#modify TTL of response, which will be send to a) validator and then b) client
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setTTL(qstate, 10)
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qstate.return_rcode = RCODE_NOERROR
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qstate.ext_state[id] = MODULE_FINISHED
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return True
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log_err("pythonmod: bad event")
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qstate.ext_state[id] = MODULE_ERROR
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return True
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