快速搭建 Go JSON-RPC Server

1import (2    "net/rpc"3    "net"4    "log"5    "net/rpc/jsonrpc"6    "fmt"7)

 1// rpc handler 2type Edwin int  3// 定义rpc method 第一个参数是请求对象，第二参数是返回对象,返回值是返回rpc 内部调用过程中出现的错误信息 4func (this *Edwin) Add(args map[string]float64,res *float64) error  { 5    *res = args["num1"] + args["num2"] 6    return  nil 7} 8func (this *Edwin) Multi(args map[string]interface{},res *float64) error { 9    *res = args["num1"].(float64) * args["num2"].(float64)10    return nil11}

 1    rpc.Register(new(Edwin)) 2 3    l,err := net.Listen("tcp",":11223") 4 5    if err!=nil{ 6        log.Fatalln("listen error:",err) 7    } 8 9    for{10        conn,err := l.Accept()1112        if err!= nil{13            log.Fatalln("accept failed:",err)14        }1516        fmt.Println("jsonrpc server  start lisen on 11223...")171819        go func(conn net.Conn) {20            fmt.Println("a new connection is coming...")21            jsonrpc.ServeConn(conn)22        }(conn)23    }

 1class JsonRpc { 2    private $conn; 3 4    function __construct($host, $port) { 5        $this->conn = fsockopen($host, $port, $errno, $errStr, 2); 6 7    } 8 9    public function call($method, $params) {1011        $err = fwrite($this->conn, json_encode([12            'method' => $method,13            'params' => array($params),14            'id' => 1,15        ]));1617        if (empty($err)) {18            return false;19        }2021        stream_set_timeout($this->conn, 0, 300);2223        $line = fgets($this->conn);24        if ($line === false) {25            return NULL;26        }2728        fclose($this->conn);2930        return json_decode($line, true);31    }32}3334$client = new JsonRPC("127.0.0.1", 11223);35$client2 = new JsonRPC("127.0.0.1", 11223);36$ret = $client->Call("Edwin2.Multi", array("num1" => 14, "num2" => 20));37$ret2 = $client2->Call("Edwin2.Add", array("num1" => 14, "num2" => 20));38var_export($ret);39var_export($ret2);

 1# 开启 jsonrpc server 2go run jsonrpc_server.go 3# 正常会输出监听信息 4> jsonrpc server  start lisen on 11223... 5> a new connection is coming... 6# 执行 jsonrpc client 7php jsonrpc_clinent.php 8# 正常输出以下信息 9> array (10  'id' => 1,11  'result' => 280,12  'error' => NULL,13)array (14  'id' => 1,15  'result' => 34,16  'error' => NULL,17)

1$err = fwrite($this->conn, json_encode([2            'method' => $method,3            'params' => array($params),4            // 'params' => $params // 不能这么用5            'id' => 1,6        ]));

1array (2  'id' => 1,3  'result' => NULL,4  'error' => 'json: cannot unmarshal object into Go value of type [1]interface {}',5)

1在 src/net/rpc/jsonrpc/server.go 第95行,go官方实现指定params必须是数组：2    var params [1]interface{}3    params[0] = x4    return json.Unmarshal(*c.req.Params, &params)5    ...