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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
https://grpc.io/
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105 lines
3.1 KiB
105 lines
3.1 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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"""Server of the Python example of customizing authentication mechanism.""" |
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import argparse |
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from concurrent import futures |
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import contextlib |
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import logging |
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import _credentials |
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import grpc |
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helloworld_pb2, helloworld_pb2_grpc = grpc.protos_and_services( |
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"helloworld.proto" |
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) |
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_LOGGER = logging.getLogger(__name__) |
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_LOGGER.setLevel(logging.INFO) |
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_LISTEN_ADDRESS_TEMPLATE = "localhost:%d" |
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_SIGNATURE_HEADER_KEY = "x-signature" |
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class SignatureValidationInterceptor(grpc.ServerInterceptor): |
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def __init__(self): |
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def abort(ignored_request, context): |
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context.abort(grpc.StatusCode.UNAUTHENTICATED, "Invalid signature") |
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self._abortion = grpc.unary_unary_rpc_method_handler(abort) |
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def intercept_service(self, continuation, handler_call_details): |
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# Example HandlerCallDetails object: |
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# _HandlerCallDetails( |
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# method=u'/helloworld.Greeter/SayHello', |
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# invocation_metadata=...) |
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method_name = handler_call_details.method.split("/")[-1] |
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expected_metadata = (_SIGNATURE_HEADER_KEY, method_name[::-1]) |
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if expected_metadata in handler_call_details.invocation_metadata: |
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return continuation(handler_call_details) |
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else: |
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return self._abortion |
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class SimpleGreeter(helloworld_pb2_grpc.GreeterServicer): |
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def SayHello(self, request, unused_context): |
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return helloworld_pb2.HelloReply(message="Hello, %s!" % request.name) |
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@contextlib.contextmanager |
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def run_server(port): |
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# Bind interceptor to server |
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server = grpc.server( |
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futures.ThreadPoolExecutor(), |
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interceptors=(SignatureValidationInterceptor(),), |
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) |
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helloworld_pb2_grpc.add_GreeterServicer_to_server(SimpleGreeter(), server) |
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# Loading credentials |
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server_credentials = grpc.ssl_server_credentials( |
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( |
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( |
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_credentials.SERVER_CERTIFICATE_KEY, |
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_credentials.SERVER_CERTIFICATE, |
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), |
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) |
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) |
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# Pass down credentials |
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port = server.add_secure_port( |
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_LISTEN_ADDRESS_TEMPLATE % port, server_credentials |
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) |
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server.start() |
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try: |
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yield server, port |
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finally: |
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server.stop(0) |
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def main(): |
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parser = argparse.ArgumentParser() |
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parser.add_argument( |
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"--port", nargs="?", type=int, default=50051, help="the listening port" |
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) |
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args = parser.parse_args() |
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with run_server(args.port) as (server, port): |
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logging.info("Server is listening at port :%d", port) |
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server.wait_for_termination() |
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if __name__ == "__main__": |
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logging.basicConfig(level=logging.INFO) |
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main()
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