golang版rpc之JSON_RPC

JSON_RPC

直接上代码

server.go

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package main

import (
"errors"
"fmt"
"net"
"net/rpc"
"net/rpc/jsonrpc"
"os"
)

type Args struct {
A, B int
}
type Quotient struct {
Quo, Rem int
}
type Arith int

func (t *Arith) Multiply(args *Args, reply *int) error {
*reply = args.A * args.B
return nil
}
func (t *Arith) Divide(args *Args, quo *Quotient) error {
if args.B == 0 {
return errors.New("divide by zero")
}
quo.Quo = args.A / args.B
quo.Rem = args.A % args.B
return nil
}
func main() {
arith := new(Arith)
rpc.Register(arith)
tcpAddr, err := net.ResolveTCPAddr("tcp", ":1234")
checkError(err)
listener, err := net.ListenTCP("tcp", tcpAddr)
checkError(err)
for {
conn, err := listener.Accept()
if err != nil {
continue
}
jsonrpc.ServeConn(conn)
}
}
func checkError(err error) {
if err != nil {
fmt.Println("Fatal error ", err.Error())
os.Exit(1)
}
}

client.go

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package main

import (
"fmt"
"log"
"net/rpc/jsonrpc"
"os"
)

type Args struct {
A, B int
}
type Quotient struct {
Quo, Rem int
}

func main() {
if len(os.Args) != 2 {
fmt.Println("Usage: ", os.Args[0], "server:port")
log.Fatal(1)
}
service := os.Args[1]
client, err := jsonrpc.Dial("tcp", service)
if err != nil {
log.Fatal("dialing:", err)
}
// Synchronous call
args := Args{17, 8}
var reply int
err = client.Call("Arith.Multiply", args, &reply)
if err != nil {
log.Fatal("arith error:", err)
}
fmt.Printf("Arith: %d*%d=%d\n", args.A, args.B, reply)
var quot Quotient
err = client.Call("Arith.Divide", args, &quot)
if err != nil {
log.Fatal("arith error:", err)
}
fmt.Printf("Arith: %d/%d=%d remainder %d\n", args.A, args.B, quot.Quo, quot.Rem)
}
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