sample-go-rpc

client.go

package main

import (
	"fmt"
	"net/rpc"
)

type DoubleArgs struct {
	Arg int
}
type DoubleReply struct {
	Res int
}

func main() {

	client, err := rpc.DialHTTP("tcp", "localhost:8081")
	if err != nil {
		panic(err.Error())
	}

	args := DoubleArgs{Arg: 1,}

	var reply *DoubleReply

	err = client.Call("MathUtil.Double", args, &reply)

	if err != nil {
		panic(err.Error())
	}

	fmt.Println(reply.Res)

}

Makefile

run-server:
	go run server/server.go

run-client:
	go run client/client.go

server.go

package main

import (
	"net"
	"net/http"
	"net/rpc"
)

type MathUtil struct {
}

type DoubleArgs struct {
	Arg int
}
type DoubleReply struct {
	Res int
}


func (mu *MathUtil) Double(args DoubleArgs, reply *DoubleReply) error {
	reply.Res = 2 * args.Arg
	return nil
}
func main() {
	mathUtil := new(MathUtil)

	err := rpc.Register(mathUtil)

	if err != nil {
		panic(err.Error())
	}

	rpc.HandleHTTP()

	listen, err := net.Listen("tcp", "localhost:8081")

	if err != nil {
		panic(err.Error())
	}

	http.Serve(listen, nil)
}

tree.txt

.
├── Makefile
├── client
│   └── client.go
└── server
    └── server.go