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[tor-bugs] #8162 [Stem]: Parsing AddrMapEvent fails because attribute is not always quoted

#8162: Parsing AddrMapEvent fails because attribute is not always quoted
--------------------+-------------------------------------------------------
 Reporter:  Desoxy  |          Owner:  atagar
     Type:  defect  |         Status:  new   
 Priority:  normal  |      Milestone:        
Component:  Stem    |        Version:        
 Keywords:          |         Parent:        
   Points:          |   Actualpoints:        
--------------------+-------------------------------------------------------
 The AddrMapEvent class expects that "expiry" is a QUOTED argument, but
 according to the spec it is either quoted or the value NEVER:

 {{{
   Syntax:
      "650" SP "ADDRMAP" SP Address SP NewAddress SP Expiry
        [SP "error=" ErrorCode] [SP "EXPIRES=" UTCExpiry] CRLF

      NewAddress = Address / "<error>"
      Expiry = DQUOTE ISOTime DQUOTE / "NEVER"

      ErrorCode = "yes" / "internal" / "Unable to launch resolve request"
      UTCExpiry = DQUOTE IsoTime DQUOTE
 }}}

 Tor seems to return the value NEVER when the result is already in the DNS
 cache because of a query made by another control connection.

 {{{
 desoxy@localhost:~/git/stem$ ./example.py ; ./example.py
 Exception in thread Event Notifier:
 Traceback (most recent call last):
   File "/usr/lib/python2.6/threading.py", line 532, in __bootstrap_inner
     self.run()
   File "/usr/lib/python2.6/threading.py", line 484, in run
     self.__target(*self.__args, **self.__kwargs)
   File "./stem/stem/control.py", line 602, in _event_loop
     self._handle_event(event_message)
   File "./stem/stem/control.py", line 2004, in _handle_event
     stem.response.convert("EVENT", event_message, arrived_at =
 time.time())
   File "./stem/stem/response/__init__.py", line 117, in convert
     message._parse_message(**kwargs)
   File "./stem/stem/response/events.py", line 55, in _parse_message
     self._parse_standard_attr()
   File "./stem/stem/response/events.py", line 100, in _parse_standard_attr
     raise stem.ProtocolError("The %s value should be quoted, but didn't
 have a starting quote: %s" % (attr_name, self))
 ProtocolError: The expiry value should be quoted, but didn't have a
 starting quote: ADDRMAP heise.de 193.99.144.80 NEVER
 }}}

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8162>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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