python - 在 Python 服务器中读取 gRPC 元数据

Question

我有这样的客户:

def run():
    channel = grpc.insecure_channel('localhost:50051')
    stub = helloworld_pb2_grpc.GreeterStub(channel)
    metadata = [('key', "value")]
    response = stub.SayHello(
        helloworld_pb2.HelloRequest(name='you'),
        metadata=metadata
    )
    print("Greeter client received: " + response.message)

和服务器:

class Greeter(helloworld_pb2_grpc.GreeterServicer):    
    def SayHello(self, request, context):
        return helloworld_pb2.HelloReply(message='Hello, %s!' % request.name)

那么，在服务器端，我该如何读取客户端发送的元数据呢？

Answer 1

https://grpc.io/grpc/python/grpc.html#grpc.ServicerContext.invocation_metadata

我们可以使用context.invocation_metadata()来访问客户端的元数据