diff options
Diffstat (limited to 'test/http2_test/http2_base_server.py')
| -rw-r--r-- | test/http2_test/http2_base_server.py | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/test/http2_test/http2_base_server.py b/test/http2_test/http2_base_server.py new file mode 100644 index 0000000000..ee7719b1a8 --- /dev/null +++ b/test/http2_test/http2_base_server.py @@ -0,0 +1,205 @@ +# Copyright 2016, Google Inc. +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions are +# met: +# +# * Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# * Redistributions in binary form must reproduce the above +# copyright notice, this list of conditions and the following disclaimer +# in the documentation and/or other materials provided with the +# distribution. +# * Neither the name of Google Inc. nor the names of its +# contributors may be used to endorse or promote products derived from +# this software without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +import logging +import messages_pb2 +import struct + +import h2 +import h2.connection +import twisted +import twisted.internet +import twisted.internet.protocol + +_READ_CHUNK_SIZE = 16384 +_GRPC_HEADER_SIZE = 5 + +class H2ProtocolBaseServer(twisted.internet.protocol.Protocol): + def __init__(self): + self._conn = h2.connection.H2Connection(client_side=False) + self._recv_buffer = {} + self._handlers = {} + self._handlers['ConnectionMade'] = self.on_connection_made_default + self._handlers['DataReceived'] = self.on_data_received_default + self._handlers['WindowUpdated'] = self.on_window_update_default + self._handlers['RequestReceived'] = self.on_request_received_default + self._handlers['SendDone'] = self.on_send_done_default + self._handlers['ConnectionLost'] = self.on_connection_lost + self._handlers['PingAcknowledged'] = self.on_ping_acknowledged_default + self._stream_status = {} + self._send_remaining = {} + self._outstanding_pings = 0 + + def set_handlers(self, handlers): + self._handlers = handlers + + def connectionMade(self): + self._handlers['ConnectionMade']() + + def connectionLost(self, reason): + self._handlers['ConnectionLost'](reason) + + def on_connection_made_default(self): + logging.info('Connection Made') + self._conn.initiate_connection() + self.transport.setTcpNoDelay(True) + self.transport.write(self._conn.data_to_send()) + + def on_connection_lost(self, reason): + logging.info('Disconnected %s' % reason) + twisted.internet.reactor.callFromThread(twisted.internet.reactor.stop) + + def dataReceived(self, data): + try: + events = self._conn.receive_data(data) + except h2.exceptions.ProtocolError: + # this try/except block catches exceptions due to race between sending + # GOAWAY and processing a response in flight. + return + if self._conn.data_to_send: + self.transport.write(self._conn.data_to_send()) + for event in events: + if isinstance(event, h2.events.RequestReceived) and self._handlers.has_key('RequestReceived'): + logging.info('RequestReceived Event for stream: %d' % event.stream_id) + self._handlers['RequestReceived'](event) + elif isinstance(event, h2.events.DataReceived) and self._handlers.has_key('DataReceived'): + logging.info('DataReceived Event for stream: %d' % event.stream_id) + self._handlers['DataReceived'](event) + elif isinstance(event, h2.events.WindowUpdated) and self._handlers.has_key('WindowUpdated'): + logging.info('WindowUpdated Event for stream: %d' % event.stream_id) + self._handlers['WindowUpdated'](event) + elif isinstance(event, h2.events.PingAcknowledged) and self._handlers.has_key('PingAcknowledged'): + logging.info('PingAcknowledged Event') + self._handlers['PingAcknowledged'](event) + self.transport.write(self._conn.data_to_send()) + + def on_ping_acknowledged_default(self, event): + logging.info('ping acknowledged') + self._outstanding_pings -= 1 + + def on_data_received_default(self, event): + self._conn.acknowledge_received_data(len(event.data), event.stream_id) + self._recv_buffer[event.stream_id] += event.data + + def on_request_received_default(self, event): + self._recv_buffer[event.stream_id] = '' + self._stream_id = event.stream_id + self._stream_status[event.stream_id] = True + self._conn.send_headers( + stream_id=event.stream_id, + headers=[ + (':status', '200'), + ('content-type', 'application/grpc'), + ('grpc-encoding', 'identity'), + ('grpc-accept-encoding', 'identity,deflate,gzip'), + ], + ) + self.transport.write(self._conn.data_to_send()) + + def on_window_update_default(self, event): + # send pending data, if any + self.default_send(event.stream_id) + + def send_reset_stream(self): + self._conn.reset_stream(self._stream_id) + self.transport.write(self._conn.data_to_send()) + + def setup_send(self, data_to_send, stream_id): + logging.info('Setting up data to send for stream_id: %d' % stream_id) + self._send_remaining[stream_id] = len(data_to_send) + self._send_offset = 0 + self._data_to_send = data_to_send + self.default_send(stream_id) + + def default_send(self, stream_id): + if not self._send_remaining.has_key(stream_id): + # not setup to send data yet + return + + while self._send_remaining[stream_id] > 0: + lfcw = self._conn.local_flow_control_window(stream_id) + if lfcw == 0: + break + chunk_size = min(lfcw, _READ_CHUNK_SIZE) + bytes_to_send = min(chunk_size, self._send_remaining[stream_id]) + logging.info('flow_control_window = %d. sending [%d:%d] stream_id %d' % + (lfcw, self._send_offset, self._send_offset + bytes_to_send, + stream_id)) + data = self._data_to_send[self._send_offset : self._send_offset + bytes_to_send] + try: + self._conn.send_data(stream_id, data, False) + except h2.exceptions.ProtocolError: + logging.info('Stream %d is closed' % stream_id) + break + self._send_remaining[stream_id] -= bytes_to_send + self._send_offset += bytes_to_send + if self._send_remaining[stream_id] == 0: + self._handlers['SendDone'](stream_id) + + def default_ping(self): + logging.info('sending ping') + self._outstanding_pings += 1 + self._conn.ping(b'\x00'*8) + self.transport.write(self._conn.data_to_send()) + + def on_send_done_default(self, stream_id): + if self._stream_status[stream_id]: + self._stream_status[stream_id] = False + self.default_send_trailer(stream_id) + else: + logging.error('Stream %d is already closed' % stream_id) + + def default_send_trailer(self, stream_id): + logging.info('Sending trailer for stream id %d' % stream_id) + self._conn.send_headers(stream_id, + headers=[ ('grpc-status', '0') ], + end_stream=True + ) + self.transport.write(self._conn.data_to_send()) + + @staticmethod + def default_response_data(response_size): + sresp = messages_pb2.SimpleResponse() + sresp.payload.body = b'\x00'*response_size + serialized_resp_proto = sresp.SerializeToString() + response_data = b'\x00' + struct.pack('i', len(serialized_resp_proto))[::-1] + serialized_resp_proto + return response_data + + def parse_received_data(self, stream_id): + """ returns a grpc framed string of bytes containing response proto of the size + asked in request """ + recv_buffer = self._recv_buffer[stream_id] + grpc_msg_size = struct.unpack('i',recv_buffer[1:5][::-1])[0] + if len(recv_buffer) != _GRPC_HEADER_SIZE + grpc_msg_size: + return None + req_proto_str = recv_buffer[5:5+grpc_msg_size] + sr = messages_pb2.SimpleRequest() + sr.ParseFromString(req_proto_str) + logging.info('Parsed request for stream %d: response_size=%s' % (stream_id, sr.response_size)) + return sr |