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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
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90 lines
2.6 KiB
90 lines
2.6 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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"""This example sends out rich error status from server-side.""" |
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from concurrent import futures |
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import time |
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import logging |
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import threading |
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import grpc |
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from grpc_status import rpc_status |
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from google.protobuf import any_pb2 |
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from google.rpc import code_pb2, status_pb2, error_details_pb2 |
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from examples import helloworld_pb2 |
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from examples import helloworld_pb2_grpc |
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_ONE_DAY_IN_SECONDS = 60 * 60 * 24 |
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def create_greet_limit_exceed_error_status(name): |
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detail = any_pb2.Any() |
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detail.Pack( |
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error_details_pb2.QuotaFailure( |
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violations=[ |
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error_details_pb2.QuotaFailure.Violation( |
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subject="name: %s" % name, |
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description="Limit one greeting per person", |
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) |
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],)) |
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return status_pb2.Status( |
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code=code_pb2.RESOURCE_EXHAUSTED, |
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message='Request limit exceeded.', |
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details=[detail], |
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) |
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class LimitedGreeter(helloworld_pb2_grpc.GreeterServicer): |
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def __init__(self): |
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self._lock = threading.RLock() |
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self._greeted = set() |
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def SayHello(self, request, context): |
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with self._lock: |
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if request.name in self._greeted: |
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rich_status = create_greet_limit_exceed_error_status( |
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request.name) |
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context.abort_with_status(rpc_status.to_status(rich_status)) |
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else: |
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self._greeted.add(request.name) |
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return helloworld_pb2.HelloReply(message='Hello, %s!' % request.name) |
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def create_server(server_address): |
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server = grpc.server(futures.ThreadPoolExecutor()) |
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helloworld_pb2_grpc.add_GreeterServicer_to_server(LimitedGreeter(), server) |
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port = server.add_insecure_port(server_address) |
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return server, port |
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def serve(server): |
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server.start() |
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try: |
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while True: |
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time.sleep(_ONE_DAY_IN_SECONDS) |
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except KeyboardInterrupt: |
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server.stop(None) |
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def main(): |
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server, unused_port = create_server('[::]:50051') |
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serve(server) |
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if __name__ == '__main__': |
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logging.basicConfig() |
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main()
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