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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
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104 lines
3.3 KiB
104 lines
3.3 KiB
# Copyright the 2019 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 cancelling requests in 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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import argparse |
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import logging |
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import signal |
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import sys |
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import grpc |
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from examples.python.cancellation import hash_name_pb2 |
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from examples.python.cancellation import hash_name_pb2_grpc |
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_DESCRIPTION = "A client for finding hashes similar to names." |
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_LOGGER = logging.getLogger(__name__) |
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def run_unary_client(server_target, name, ideal_distance): |
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with grpc.insecure_channel(server_target) as channel: |
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stub = hash_name_pb2_grpc.HashFinderStub(channel) |
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future = stub.Find.future( |
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hash_name_pb2.HashNameRequest( |
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desired_name=name, ideal_hamming_distance=ideal_distance), |
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wait_for_ready=True) |
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def cancel_request(unused_signum, unused_frame): |
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future.cancel() |
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sys.exit(0) |
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signal.signal(signal.SIGINT, cancel_request) |
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result = future.result() |
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print(result) |
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def run_streaming_client(server_target, name, ideal_distance, |
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interesting_distance): |
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with grpc.insecure_channel(server_target) as channel: |
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stub = hash_name_pb2_grpc.HashFinderStub(channel) |
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result_generator = stub.FindRange( |
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hash_name_pb2.HashNameRequest( |
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desired_name=name, |
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ideal_hamming_distance=ideal_distance, |
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interesting_hamming_distance=interesting_distance), |
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wait_for_ready=True) |
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def cancel_request(unused_signum, unused_frame): |
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result_generator.cancel() |
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sys.exit(0) |
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signal.signal(signal.SIGINT, cancel_request) |
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for result in result_generator: |
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print(result) |
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def main(): |
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parser = argparse.ArgumentParser(description=_DESCRIPTION) |
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parser.add_argument("name", type=str, help='The desired name.') |
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parser.add_argument( |
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"--ideal-distance", |
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default=0, |
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nargs='?', |
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type=int, |
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help="The desired Hamming distance.") |
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parser.add_argument( |
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'--server', |
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default='localhost:50051', |
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type=str, |
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nargs='?', |
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help='The host-port pair at which to reach the server.') |
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parser.add_argument( |
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'--show-inferior', |
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default=None, |
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type=int, |
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nargs='?', |
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help='Also show candidates with a Hamming distance less than this value.' |
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) |
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args = parser.parse_args() |
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if args.show_inferior is not None: |
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run_streaming_client(args.server, args.name, args.ideal_distance, |
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args.show_inferior) |
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else: |
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run_unary_client(args.server, args.name, args.ideal_distance) |
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if __name__ == "__main__": |
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logging.basicConfig() |
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main()
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