PHP创建简单RPC服务案例详解

<?php
class RpcServer {
    protected $server = null;

    public function __construct($host, $port, $path)
    {
        // 创建一个 Socket 服务
        if(($this->server = socket_create(AF_INET,SOCK_STREAM,SOL_TCP)) < 0) {
            exit("socket_create() 失败的原因是:".socket_strerror($this->server)."\n");
        }
        if(($ret = socket_bind($this->server,$host,$port)) < 0) {
            exit("socket_bind() 失败的原因是:".socket_strerror($ret)."\n");
        }
        if(($ret = socket_listen($this->server,3)) < 0) {
            exit("socket_listen() 失败的原因是:".socket_strerror($ret)."\n");
        }

        // 判断 RPC 服务目录是否存在
        $realPath = realpath(__DIR__ . $path);
        if ($realPath === false || !file_exists($realPath)) {
            exit("{$path} error \n");
        }

        do {
            $client = socket_accept($this->server);
            if($client) {
                // 一次性读取
                $buf = socket_read($client, 8024);
                echo $buf;

                //解析客户端发送过来的协议
                $classRet = preg_match('/Rpc-Class:\s(.*);\r\n/i', $buf, $class);
                $methodRet = preg_match('/Rpc-Method:\s(.*);\r\n/i', $buf, $method);
                $paramsRet = preg_match('/Rpc-Params:\s(.*);\r\n/i', $buf, $params);

                if($classRet && $methodRet) {
                    $class = ucfirst($class[1]);
                    $method = $method[1];
                    $params = JSON_decode($params[1], true);
                    $file = $realPath . '/' . $class . '.php';  // 类文件需要和类名一致
                    $data = ''; // 执行结果
                    // 判断类文件是否存在
                    if(file_exists($file)) {
                        // 引入类文件
                        require_once $file;
                        // 实例化类
                        $rfc_obj = new ReflectionClass($class);
                        // 判断该类指定方法是否存在
                        if($rfc_obj->hasMethod($method)) {
                            // 执行类方法
                            $rfc_method = $rfc_obj->getMethod($method);
                            $data = $rfc_method->invokeArgs($rfc_obj->newInstance(), [$params]);
                        } else {
                            socket_write($client, 'method error');
                        }
                        //把运行后的结果返回给客户端
                        socket_write($client, $data);
                    }
                } else {
                    socket_write($client, 'class or method error');
                }

                // 关闭客户端
                socket_close($client);
            }

        }while(true);
    }

    public function __destruct()
    {
        socket_close($this->server);
    }
}

new RpcServer('127.0.0.1',8080,'./service');

<?php
class RpcClient {
    protected $client = null;
    protected $url_info = [];   // 远程调用 URL 组成部分

    public function __construct($url)
    {
        // 解析 URL
        $this->url_info = parse_url($url);
    }

    public function __call($name, $arguments)
    {
        // 创建一个客户端
        $this->client = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
        if(!$this->client) {
            exit('socket_create() 失败');
        }
        socket_connect($this->client, $this->url_info['host'], $this->url_info['port']);

        // 传递调用的类名
        $class = basename($this->url_info['path']);
        // 传递调用的参数
        $args = '';
        if(isset($arguments[0])) {
            $args = json_encode($arguments[0]);
        }
        // 向服务端发送我们自定义的协议数据
        $proto = "Rpc-Class: {$class};".PHP_EOL
            ."Rpc-Method: {$name};".PHP_EOL
            ."Rpc-Params: {$args};".PHP_EOL;
        socket_write($this->client, $proto);
        // 读取服务端传来的数据
        $buf = socket_read($this->client, 8024);
        socket_close($this->client);
        return $buf;
    }
}

$rpcClient = new RpcClient('http://127.0.0.1:8080/news');
echo $rpcClient->display(['title'=>'txl']);
echo $rpcClient->display(['title'=>'hello world']);

<?php
class News {
    public function display($data)
    {
        return json_encode(['result'=>"News display(), title is {$data['title']}"]);
    }
}