$git clone https://github.com/google/protobuf
   $cd protobuf
   $./autogen.sh
   $./configure
   $make
   $make check
   #make install

   go get -u github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway
   go get -u github.com/grpc-ecosystem/grpc-gateway/protoc-gen-swagger
   go get -u github.com/golang/protobuf/{proto,protoc-gen-go}
   go get google.golang.org/grpc

.
├── gateway
│   └── main.go
├── greeter_client
│   └── main.go
├── greeter_server
│   └── main.go
├── proto
│   ├── google
│   │   └── api
│   │       ├── annotations.pb.go
│   │       ├── annotations.proto
│   │       ├── http.pb.go
│   │       └── http.proto
│   ├── helloworld.pb.go
│   ├── helloworld.pb.gw.go
│   ├── helloworld.proto
│   └── Makefile
└── README.md

   cd proto && make 

   $cd greeter_server && go run main.go

   $cd gateway && go run main.go

   $curl -X POST -k http://localhost:8080/v1/example/echo -d '{"name": " world"}'