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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
19
20class TestcasePing(object):
21    """
22    This test injects PING frames before and after header and data. Keeps count
23    of outstanding ping response and asserts when the count is non-zero at the
24    end of the test.
25  """
26
27    def __init__(self):
28        self._base_server = http2_base_server.H2ProtocolBaseServer()
29        self._base_server._handlers[
30            'RequestReceived'] = self.on_request_received
31        self._base_server._handlers['DataReceived'] = self.on_data_received
32        self._base_server._handlers['ConnectionLost'] = self.on_connection_lost
33
34    def get_base_server(self):
35        return self._base_server
36
37    def on_request_received(self, event):
38        self._base_server.default_ping()
39        self._base_server.on_request_received_default(event)
40        self._base_server.default_ping()
41
42    def on_data_received(self, event):
43        self._base_server.on_data_received_default(event)
44        sr = self._base_server.parse_received_data(event.stream_id)
45        if sr:
46            logging.info('Creating response size = %s' % sr.response_size)
47            response_data = self._base_server.default_response_data(
48                sr.response_size)
49            self._base_server.default_ping()
50            self._base_server.setup_send(response_data, event.stream_id)
51            self._base_server.default_ping()
52
53    def on_connection_lost(self, reason):
54        logging.info('Disconnect received. Ping Count %d' %
55                     self._base_server._outstanding_pings)
56        assert (self._base_server._outstanding_pings == 0)
57        self._base_server.on_connection_lost(reason)
58