def _deferred_query_callback(cls, list):
responses = NotaryResponses([])
for success, response in list:
if success:
responses.append(response)
return responses
def query(self, service, num=0, timeout=10):
"""Query Notaries and return NotaryResponses instance
For any Notary not responding, a None will be in the array.
num specifies the number of Notaries to query. If 0, all notaries
are queried.
timeout is the timeout in seconds"""
if num == 0:
to_query = self
else:
if num > len(self):
raise ValueError("Too many notaries requested (%s > %s)" % (num, len(self)))
to_query = random.sample(self, num)
responses = NotaryResponses()
dispatchers = []
# Use own map here for thread safety
map = {}
for notary in to_query:
self.logger.debug("Querying %s about %s..." % (notary, service))
dispatchers.append((notary, notary.get_dispatcher(service, map)))
self.logger.debug("Calling asyncore.loop()")
timed_asyncore.loop_with_timeout(timeout=timeout, map=map)
self.logger.debug("asyncore.loop() done.")
for notary, dispatcher in dispatchers:
try:
self.logger.debug("Parsing response from %s" % notary)
response = dispatcher.get_response()
self.logger.debug("Response from %s parsed" % notary)
responses.append(response)
except EOFError as e:
self.logger.error("Failed to get response from %s: %s" % (notary, str(e)))
responses.append(None)
except httplib.BadStatusLine as e:
self.logger.error("Failed to parse response from %s, bad status: %s" % (notary, e))
responses.append(None)
except NotaryException as e:
self.logger.error("Error validating response from %s: %s" % (notary, e))
responses.append(None)
except Exception as e:
self.logger.exception("Unknown error handling response from %s: %s" % (notary, e))
responses.append(None)
return responses