grpc/examples/python/interceptors/headers/greeter_server.py

# 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()