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 logging
16
17import http2_base_server
18
19class TestcasePing(object):
20  """
21    This test injects PING frames before and after header and data. Keeps count
22    of outstanding ping response and asserts when the count is non-zero at the
23    end of the test.
24  """
25  def __init__(self):
26    self._base_server = http2_base_server.H2ProtocolBaseServer()
27    self._base_server._handlers['RequestReceived'] = self.on_request_received
28    self._base_server._handlers['DataReceived'] = self.on_data_received
29    self._base_server._handlers['ConnectionLost'] = self.on_connection_lost
30
31  def get_base_server(self):
32    return self._base_server
33
34  def on_request_received(self, event):
35    self._base_server.default_ping()
36    self._base_server.on_request_received_default(event)
37    self._base_server.default_ping()
38
39  def on_data_received(self, event):
40    self._base_server.on_data_received_default(event)
41    sr = self._base_server.parse_received_data(event.stream_id)
42    if sr:
43      logging.info('Creating response size = %s' % sr.response_size)
44      response_data = self._base_server.default_response_data(sr.response_size)
45      self._base_server.default_ping()
46      self._base_server.setup_send(response_data, event.stream_id)
47      self._base_server.default_ping()
48
49  def on_connection_lost(self, reason):
50    logging.info('Disconnect received. Ping Count %d' % self._base_server._outstanding_pings)
51    assert(self._base_server._outstanding_pings == 0)
52    self._base_server.on_connection_lost(reason)
53