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+# 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.
+"""Tests server and client side compression."""
+
+import unittest
+
+import grpc
+from grpc import _grpcio_metadata
+from grpc.framework.foundation import logging_pool
+
+from tests.unit import test_common
+from tests.unit.framework.common import test_constants
+
+_UNARY_UNARY = '/test/UnaryUnary'
+_STREAM_STREAM = '/test/StreamStream'
+
+
+def handle_unary(request, servicer_context):
+ servicer_context.send_initial_metadata([
+ ('grpc-internal-encoding-request', 'gzip')])
+ return request
+
+
+def handle_stream(request_iterator, servicer_context):
+ # TODO(issue:#6891) We should be able to remove this loop,
+ # and replace with return; yield
+ servicer_context.send_initial_metadata([
+ ('grpc-internal-encoding-request', 'gzip')])
+ for request in request_iterator:
+ yield request
+
+
+class _MethodHandler(grpc.RpcMethodHandler):
+
+ def __init__(self, request_streaming, response_streaming):
+ self.request_streaming = request_streaming
+ self.response_streaming = response_streaming
+ self.request_deserializer = None
+ self.response_serializer = None
+ self.unary_unary = None
+ self.unary_stream = None
+ self.stream_unary = None
+ self.stream_stream = None
+ if self.request_streaming and self.response_streaming:
+ self.stream_stream = lambda x, y: handle_stream(x, y)
+ elif not self.request_streaming and not self.response_streaming:
+ self.unary_unary = lambda x, y: handle_unary(x, y)
+
+
+class _GenericHandler(grpc.GenericRpcHandler):
+
+ def service(self, handler_call_details):
+ if handler_call_details.method == _UNARY_UNARY:
+ return _MethodHandler(False, False)
+ elif handler_call_details.method == _STREAM_STREAM:
+ return _MethodHandler(True, True)
+ else:
+ return None
+
+
+class CompressionTest(unittest.TestCase):
+
+ def setUp(self):
+ self._server_pool = logging_pool.pool(test_constants.THREAD_CONCURRENCY)
+ self._server = grpc.server((_GenericHandler(),), self._server_pool)
+ self._port = self._server.add_insecure_port('[::]:0')
+ self._server.start()
+
+ def testUnary(self):
+ request = b'\x00' * 100
+
+ # Client -> server compressed through default client channel compression
+ # settings. Server -> client compressed via server-side metadata setting.
+ # TODO(https://github.com/grpc/grpc/issues/4078): replace the "1" integer
+ # literal with proper use of the public API.
+ compressed_channel = grpc.insecure_channel('localhost:%d' % self._port,
+ options=[('grpc.default_compression_algorithm', 1)])
+ multi_callable = compressed_channel.unary_unary(_UNARY_UNARY)
+ response = multi_callable(request)
+ self.assertEqual(request, response)
+
+ # Client -> server compressed through client metadata setting. Server ->
+ # client compressed via server-side metadata setting.
+ # TODO(https://github.com/grpc/grpc/issues/4078): replace the "0" integer
+ # literal with proper use of the public API.
+ uncompressed_channel = grpc.insecure_channel('localhost:%d' % self._port,
+ options=[('grpc.default_compression_algorithm', 0)])
+ multi_callable = compressed_channel.unary_unary(_UNARY_UNARY)
+ response = multi_callable(request, metadata=[
+ ('grpc-internal-encoding-request', 'gzip')])
+ self.assertEqual(request, response)
+
+ def testStreaming(self):
+ request = b'\x00' * 100
+
+ # TODO(https://github.com/grpc/grpc/issues/4078): replace the "1" integer
+ # literal with proper use of the public API.
+ compressed_channel = grpc.insecure_channel('localhost:%d' % self._port,
+ options=[('grpc.default_compression_algorithm', 1)])
+ multi_callable = compressed_channel.stream_stream(_STREAM_STREAM)
+ call = multi_callable([request] * test_constants.STREAM_LENGTH)
+ for response in call:
+ self.assertEqual(request, response)
+
+
+if __name__ == '__main__':
+ unittest.main(verbosity=2)