golang的rpc有两种方法进行调用，一种是rpc例子中给的：package main

import (

"net/rpc"

"net/http"

"log"

"net"

"time"

)

type Args struct {

A, B int

}

type Arith int

func (t *Arith) Multiply(args *Args, reply *([]string)) error {

*reply = append(*reply, "test")

return nil

}

func main() {

arith := new(Arith)

rpc.Register(arith)

rpc.HandleHTTP()

l, e := net.Listen("tcp", ":1234")

if e != nil {

log.Fatal("listen error:", e)

}

go http.Serve(l, nil)

time.Sleep(5 * time.Second)

client, err := rpc.DialHTTP("tcp", "127.0.0.1" + ":1234")

if err != nil {

log.Fatal("dialing:", err)

}

args := &Args{7,8}

reply := make([]string, 10)

err = client.Call("Arith.Multiply", args, &reply)

if err != nil {

log.Fatal("arith error:", err)

}

log.Println(reply)

}

另一种是使用NewServer

这种是当rpc已经注册的时候就要使用了另外一种了。即一个server只能在DefaultRPC中注册一种类型。

当Server使用rpc.NewServer的时候，client也需要进行下改动了package main

import (

"net/rpc"

//"net/http"

"log"

"net"

"time"

)

type Args struct {

A, B int

}

type Arith int

func (t *Arith) Multiply(args *Args, reply *([]string)) error {

*reply = append(*reply, "test")

return nil

}

func main() {

newServer := rpc.NewServer()

newServer.Register(new(Arith))

l, e := net.Listen("tcp", "127.0.0.1:1234") // any available address

if e != nil {

log.Fatalf("net.Listen tcp :0: %v", e)

}

go newServer.Accept(l)

newServer.HandleHTTP("/foo", "/bar")

time.Sleep(2 * time.Second)

address, err := net.ResolveTCPAddr("tcp", "127.0.0.1:1234")

if err != nil {

panic(err)

}

conn, _ := net.DialTCP("tcp", nil, address)

defer conn.Close()

client := rpc.NewClient(conn)

defer client.Close()

args := &Args{7,8}

reply := make([]string, 10)

err = client.Call("Arith.Multiply", args, &reply)

if err != nil {

log.Fatal("arith error:", err)

}

log.Println(reply)

}第二个例子中的newServer.HandleHTTP("/foo", "/bar")可以任意设置，第一个例子其实是设置了默认的两个这里也顺便将reply作为[]slice的例子给演示了下