1# Copyright 2016 gRPC authors. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14 15import hyperframe.frame 16import logging 17 18import http2_base_server 19 20class TestcaseSettingsMaxStreams(object): 21 """ 22 This test sets MAX_CONCURRENT_STREAMS to 1 and asserts that at any point 23 only 1 stream is active. 24 """ 25 def __init__(self): 26 self._base_server = http2_base_server.H2ProtocolBaseServer() 27 self._base_server._handlers['DataReceived'] = self.on_data_received 28 self._base_server._handlers['ConnectionMade'] = self.on_connection_made 29 30 def get_base_server(self): 31 return self._base_server 32 33 def on_connection_made(self): 34 logging.info('Connection Made') 35 self._base_server._conn.initiate_connection() 36 self._base_server._conn.update_settings( 37 {hyperframe.frame.SettingsFrame.MAX_CONCURRENT_STREAMS: 1}) 38 self._base_server.transport.setTcpNoDelay(True) 39 self._base_server.transport.write(self._base_server._conn.data_to_send()) 40 41 def on_data_received(self, event): 42 self._base_server.on_data_received_default(event) 43 sr = self._base_server.parse_received_data(event.stream_id) 44 if sr: 45 logging.info('Creating response of size = %s' % sr.response_size) 46 response_data = self._base_server.default_response_data(sr.response_size) 47 self._base_server.setup_send(response_data, event.stream_id) 48 # TODO (makdharma): Add assertion to check number of live streams 49