Protocol Buffers🐣

Open source: grpc-expose-http

Dependent🔗

Download HTTP plugin

$ go get -u github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway

Run⛹️‍♂️

Compile the ProtoBuf file

1. Exec http_proto

2. Start the gRPC service first

go run -v grpc_server.go

3. Then start the HTTP service

go run -v http_server.go

Test it🐞

GET

// request
\
curl -X GET \
  http://localhost:8080/get/hello%20gRpc \
  -H 'content-type: application/json' \
  | json_pp

// response
> curl -X GET \
>   http://localhost:8080/get/hello%20gRpc \
>   -H 'content-type: application/json' \
>   | json_pp
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100    26  100    26    0     0   2363      0 --:--:-- --:--:-- --:--:--  2363
{
   "value" : "Get=hello gRpc"
}

POST

// request
\
curl -X POST \
  http://localhost:8080/post \
  -H 'content-type: application/json' \
  -d '{"value":"hello gRPC"}' \
 |  json_pp

// response
> curl -X POST \
>   http://localhost:8080/post \
>   -H 'content-type: application/json' \
>   -d '{"value":"hello gRPC"}' \
>  |  json_pp
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100    49  100    27  100    22   1500   1222 --:--:-- --:--:-- --:--:--  2722
{
   "value" : "Post=hello gRPC"
}

---

Protocol Buffers🌽

annotations.proto and http.proto copy from grpc-gateway, these two files are required to expose HTTP

Compile🤖

In the current directory, exec the command to compile annotations.proto and http.proto:

protoc --go_out=plugins=grpc:./ ./http.proto
protoc --go_out=plugins=grpc:./ ./annotations.proto

generate these two files:

-rw-r--r--  1 kevin  staff   2.4K Feb  3 14:19 annotations.pb.go
-rw-r--r--  1 kevin  staff    20K Feb  3 14:19 http.pb.go

continue compiling rest.proto:

protoc -I/usr/local/include -I. \
    -I${GOPATH}/src \
    -I${GOPATH}/src/github.com/grpc-ecosystem/grpc-gateway/third_party/googleapis \
    --grpc-gateway_out=. --go_out=plugins=grpc:.\
     rest.proto

generate these two files:

-rw-r--r--  1 kevin  staff   7.4K Feb  3 14:46 rest.pb.go
-rw-r--r--  1 kevin  staff    10K Feb  3 14:46 rest.pb.gw.go

👋👋👋

Proto pre work is finished