interceptors/headers/greeter_server.py

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# Copyright 2017 gRPC authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""The Python implementation of the GRPC helloworld.Greeter server."""
 
from concurrent import futures
import logging
 
import grpc
import helloworld_pb2
import helloworld_pb2_grpc
from request_header_validator_interceptor import \
    RequestHeaderValidatorInterceptor
 
 
class Greeter(helloworld_pb2_grpc.GreeterServicer):
 
    def SayHello(self, request, context):
        return helloworld_pb2.HelloReply(message='Hello, %s!' % request.name)
 
 
def serve():
    header_validator = RequestHeaderValidatorInterceptor(
        'one-time-password', '42', grpc.StatusCode.UNAUTHENTICATED,
        'Access denied!')
    server = grpc.server(futures.ThreadPoolExecutor(max_workers=10),
                         interceptors=(header_validator,))
    helloworld_pb2_grpc.add_GreeterServicer_to_server(Greeter(), server)
    server.add_insecure_port('[::]:50051')
    server.start()
    server.wait_for_termination()
 
 
if __name__ == '__main__':
    logging.basicConfig()
    serve()