def _handleResponse(self, token, data):
try:
cursor = self._cursor_cache.get(token)
if cursor is not None:
cursor._extend(data)
elif token in self._user_queries:
query, deferred = self._user_queries[token]
res = Response(token, data,
self._parent._get_json_decoder(query))
if res.type == pResponse.SUCCESS_ATOM:
deferred.callback(maybe_profile(res.data[0], res))
elif res.type in (pResponse.SUCCESS_SEQUENCE,
pResponse.SUCCESS_PARTIAL):
cursor = TwistedCursor(self, query, res)
deferred.callback(maybe_profile(cursor, res))
elif res.type == pResponse.WAIT_COMPLETE:
deferred.callback(None)
elif res.type == pResponse.SERVER_INFO:
deferred.callback(res.data[0])
else:
deferred.errback(res.make_error(query))
del self._user_queries[token]
elif not self._closing:
raise ReqlDriverError("Unexpected response received.")
except Exception as e:
if not self._closing:
self.close(exception=e)
def _reader(self):
try:
while True:
buf = yield from self._streamreader.readexactly(12)
(token, length,) = struct.unpack("<qL", buf)
buf = yield from self._streamreader.readexactly(length)
cursor = self._cursor_cache.get(token)
if cursor is not None:
cursor._extend(buf)
elif token in self._user_queries:
# Do not pop the query from the dict until later, so
# we don't lose track of it in case of an exception
query, future = self._user_queries[token]
res = Response(token, buf, self._parent._get_json_decoder(query))
if res.type == pResponse.SUCCESS_ATOM:
future.set_result(maybe_profile(res.data[0], res))
elif res.type in (
pResponse.SUCCESS_SEQUENCE,
pResponse.SUCCESS_PARTIAL,
):
cursor = AsyncioCursor(self, query, res)
future.set_result(maybe_profile(cursor, res))
elif res.type == pResponse.WAIT_COMPLETE:
future.set_result(None)
elif res.type == pResponse.SERVER_INFO:
future.set_result(res.data[0])
else:
future.set_exception(res.make_error(query))
del self._user_queries[token]
elif not self._closing:
raise ReqlDriverError("Unexpected response received.")
except Exception as ex:
if not self._closing:
yield from self.close(exception=ex)
def data_received(self, data):
if self._response_buf:
data = self._response_buf + data
try:
value = None
if self.connection.requests_processed == 1:
if b'\0' in data:
idx = data.index(b'\0')
msg, data = data[:idx], data[idx+1:]
if msg != b'SUCCESS':
raise RqlDriverError(
'Server dropped connection: "%s"' %
msg.decode('utf-8').strip())
elif len(data) >= 12:
buf, data = data[:12], data[12:]
token, size = struct.unpack("<qL", buf)
if len(data) >= size:
buf, data = data[:size], data[size:]
response = Response(token, buf)
if data:
raise RqlDriverError('protocol error')
elif response.token != self.request.token:
raise RqlDriverError('Unexpected response token')
value = self._check_response(response)
else:
data = buf + data
except Exception as exc:
self.finished(exc=exc)
else:
self._response_buf = data
if not data:
self.finished(value)
def _extend(self, res_buf):
''' Override so that we can make this async, and also to wake up blocked
tasks. '''
self.outstanding_requests -= 1
self._maybe_fetch_batch()
res = Response(self.query.token, res_buf, self._json_decoder)
self._extend_internal(res)
self._new_response.set()
self._new_response = trio.Event()