【grpcurl】使用grpcurl测试GRPC服务

一、场景

    由于我们需要访问GRPC服务的方法，便于我们进行测试，所以我们开启了grpc服务的反射机制

 

二、安装grpcurl

    https://github.com/fullstorydev/grpcurl

   https://github.com/fullstorydev/grpcurl/releases 下载对应环境的包即可

sudo dpkg -i grpcurl_1.9.1_linux_amd64.deb

ubuntu系统安装

 

三、服务端代码

# Copyright 2018 The 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 reflection-enabled version of gRPC helloworld.Greeter server."""
import time
from concurrent import futures
import loggingimport grpc
from grpc_reflection.v1alpha import reflection
from grpc_reflection.v1alpha import reflection_pb2_grpc
import helloworld_pb2
import helloworld_pb2_grpcclass Greeter(helloworld_pb2_grpc.GreeterServicer):def SayHello(self, request, context):print(time.time())return helloworld_pb2.HelloReply(message="Hello, %s!" % request.name)def serve():server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))helloworld_pb2_grpc.add_GreeterServicer_to_server(Greeter(), server)SERVICE_NAMES = (helloworld_pb2.DESCRIPTOR.services_by_name["Greeter"].full_name,reflection.SERVICE_NAME,)reflection.enable_server_reflection(SERVICE_NAMES, server)# server.add_insecure_port("[::]:50051")server.add_insecure_port("127.0.0.1:50051")server.start()server.wait_for_termination()if __name__ == "__main__":logging.basicConfig()serve()

需要安装

pip install grpcio_reflection

 

四、使用

1、查看服务及接口信息

$ grpcurl --plaintext  localhost:50051 describe
grpc.reflection.v1alpha.ServerReflection is a service:
service ServerReflection {rpc ServerReflectionInfo ( stream .grpc.reflection.v1alpha.ServerReflectionRequest ) returns ( stream .grpc.reflection.v1alpha.ServerReflectionResponse );
}
helloworld.Greeter is a service:
service Greeter {rpc SayHello ( .helloworld.HelloRequest ) returns ( .helloworld.HelloReply );rpc SayHelloBidiStream ( stream .helloworld.HelloRequest ) returns ( stream .helloworld.HelloReply );rpc SayHelloStreamReply ( .helloworld.HelloRequest ) returns ( stream .helloworld.HelloReply );
}

 

2、查看服务信息

$ grpcurl --plaintext  localhost:50051 list
grpc.reflection.v1alpha.ServerReflection
helloworld.Greeter

 

3、调用grpc服务方法

$ grpcurl --plaintext -d '{ "name": "World" }' localhost:50051 helloworld.Greeter/SayHello
{"message": "Hello, World!"
}

 

 

五、问题

1、$ grpcurl localhost:50051 describe
Failed to dial target host "localhost:50051": tls: first record does not look like a TLS handshake

由于默认是TLS加密，我们起的服务不支持，所以需要使用--plaintext参数

 

参考链接：

在 ASP.NET Core 中使用 gRPCurl 和 gRPCui 测试 gRPC 服务 | Microsoft Learn