Hello World

Hello world in gRPC!

Directory Structure

.
├── helloworld.proto
├── main.go
├── Makefile
├── protos
│   ├── helloworld_grpc.pb.go
│   └── helloworld.pb.go
├── README.md
└── server
    └── server.go

Testing

To test the system install grpccurl which is a command line tool which can interact with gRPC API's

Link to the repo is here!

go install github.com/fullstorydev/grpcurl/cmd/grpcurl

Run the server

• Command: go run main.go

List Services

• Command: grpcurl --plaintext localhost:8080 list
• Output:

  Greeter
  grpc.reflection.v1alpha.ServerReflection
  

List Methods

• Command: grpcurl --plaintext localhost:8080 list Currency
• Output: Greeter.SayHello

Method detail for GetRate

• Command: grpcurl --plaintext localhost:8080 describe Currency.GetRate
• Output:

  Greeter.SayHello is a method:
  rpc SayHello ( .HelloRequest ) returns ( .HelloResponse );
  

RateRequest detail

• Command: grpcurl --plaintext localhost:8080 describe .HelloRequest
• Output:

  HelloRequest is a message:
  message HelloRequest {
      string name = 1;
  }
  

RateResponse detail

• Command: grpcurl --plaintext localhost:8080 describe .HelloResponse
• Output:

  HelloResponse is a message:
  message HelloResponse {
      string message = 1;
  }
  

Execute a request

• Command: grpcurl --plaintext -d '{"name":"Ankit"}' localhost:8080 Greeter.SayHello
• Output:

  {
      "message": "Hello Ankit"
  }