grpc-proxy

gRpcHelloClient ----> gRpcProxy ----> gRpcHelloServer
                      ^                    |
                      |______register______|

building

go build -o gRpcHelloServer internal/hello/pkg/server/server.go
go build -o gRpcHelloClient internal/hello/pkg/client/client.go
go build -o gRpcProxy internal/main.go

grpc-proxy

• listen address 0.0.0.0:9991
  • internal/main.go
  • internal/proxy/pkg/cmd/cmd.go
  • internal/proxy/pkg/boot/boot.go
  • internal/proxy/internal/api/proxy_register_impl.go
• forward service
  • receive register request from 'gRpcHelloServer'
  • forward request of '/grpc.proxy.hello.v1.HelloService/Hello' from 'gRpcHelloClient' to 'gRpcHelloServer'
  • param fullMethodName for Director like '/grpc.proxy.hello.v1.HelloService/Hello'
  • parse service name to 'grpc.proxy.hello.v1.HelloService' and forward to 'gRpcHelloServer'
• running log

grpc-proxy ./gRpcProxy      
2022/06/04 14:16:55 Listen at: 0.0.0.0:9991
2022/06/04 14:16:58 proxy register grpc.proxy.hello.v1.HelloService 127.0.0.1:9999
2022/06/04 14:17:01 proxy.forward.Director /grpc.proxy.hello.v1.HelloService/Hello grpc.proxy.hello.v1.HelloService

hello server

• listen address 0.0.0.0:9999
  • internal/hello/pkg/server/server.go
  • internal/hello/pkg/cmd/cmd.go
  • internal/hello/pkg/boot/boot.go
  • internal/hello/internal/api/hello_service_impl.go
• register hello service to gRpcProxy
  • serviceName: grpc.proxy.hello.v1.HelloService
  • serviceEndpoint: 127.0.0.1:9999
• running log

grpc-proxy ./gRpcHelloServer
2022/06/04 14:16:58 Listen outer at: 0.0.0.0:9999
2022/06/04 14:17:01 hello-server begin hello

hello client

• connect to gRpcProxy by 127.0.0.1:9991
• gRpcProxy forward hello request to gRpcHelloServer by 127.0.0.1:9999
  • internal/hello/pkg/client/client.go
• running log

grpc-proxy ./gRpcHelloClient
2022/06/04 14:17:01 Hello response hello

more infos pls refer to https://github.com/mwitkow/grpc-proxy