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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
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99 lines
3.5 KiB
99 lines
3.5 KiB
# Copyright 2019 the gRPC authors. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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"""An example of compression on the server side with gRPC.""" |
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from __future__ import absolute_import |
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from __future__ import division |
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from __future__ import print_function |
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from concurrent import futures |
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import argparse |
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import logging |
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import threading |
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import grpc |
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from examples.protos import helloworld_pb2 |
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from examples.protos import helloworld_pb2_grpc |
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_DESCRIPTION = 'A server capable of compression.' |
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_COMPRESSION_OPTIONS = { |
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"none": grpc.Compression.NoCompression, |
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"deflate": grpc.Compression.Deflate, |
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"gzip": grpc.Compression.Gzip, |
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} |
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_LOGGER = logging.getLogger(__name__) |
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_SERVER_HOST = 'localhost' |
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class Greeter(helloworld_pb2_grpc.GreeterServicer): |
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def __init__(self, no_compress_every_n): |
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super(Greeter, self).__init__() |
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self._no_compress_every_n = 0 |
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self._request_counter = 0 |
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self._counter_lock = threading.RLock() |
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def _should_suppress_compression(self): |
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suppress_compression = False |
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with self._counter_lock: |
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if self._no_compress_every_n and self._request_counter % self._no_compress_every_n == 0: |
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suppress_compression = True |
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self._request_counter += 1 |
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return suppress_compression |
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def SayHello(self, request, context): |
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if self._should_suppress_compression(): |
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context.set_response_compression(grpc.Compression.NoCompression) |
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return helloworld_pb2.HelloReply(message='Hello, %s!' % request.name) |
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def run_server(server_compression, no_compress_every_n, port): |
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server = grpc.server(futures.ThreadPoolExecutor(), |
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compression=server_compression, |
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options=(('grpc.so_reuseport', 1),)) |
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helloworld_pb2_grpc.add_GreeterServicer_to_server( |
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Greeter(no_compress_every_n), server) |
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address = '{}:{}'.format(_SERVER_HOST, port) |
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server.add_insecure_port(address) |
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server.start() |
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print("Server listening at '{}'".format(address)) |
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server.wait_for_termination() |
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def main(): |
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parser = argparse.ArgumentParser(description=_DESCRIPTION) |
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parser.add_argument('--server_compression', |
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default='none', |
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nargs='?', |
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choices=_COMPRESSION_OPTIONS.keys(), |
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help='The default compression method for the server.') |
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parser.add_argument('--no_compress_every_n', |
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type=int, |
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default=0, |
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nargs='?', |
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help='If set, every nth reply will be uncompressed.') |
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parser.add_argument('--port', |
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type=int, |
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default=50051, |
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nargs='?', |
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help='The port on which the server will listen.') |
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args = parser.parse_args() |
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run_server(_COMPRESSION_OPTIONS[args.server_compression], |
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args.no_compress_every_n, args.port) |
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if __name__ == "__main__": |
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logging.basicConfig() |
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main()
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