介绍Swoole的简单运用实现例子

Swoole框架栏目介绍介绍Swoole的简单运用实现例子

推荐（免费）：Swoole框架

前言

我们使用PHP开发WEB应用基本都是使用传统的LAMP／LNMP模式来提供HTTP服务，这种模式一般是同步且堵塞的，若我们想使用PHP开发一些高级的特性（例如：异步，非堵塞，网络服务器等），那么Swoole无疑是最佳的选择，那什么是Swoole呢？

PHP的异步、并行、高性能网络通信引擎，使用纯C语言编写，提供了 PHP语言的异步多线程服务器， 异步TCP/UDP网络客户端， 异步MySQL， 异步Redis， 数据库连接池， AsyncTask， 消息队列， 毫秒定时器， 异步文件读写， 异步DNS查询。 Swoole内置了 Http/WebSocket服务器端/ 客户端、 Http2.0服务器端/ 客户端。

简单的来说，Swoole是一个PHP扩展，实现了网络层的很多功能，应用场景非常广，下面列举几个例子简单介绍一下Swoole的应用。

安装

按照官方文档进行安装：Swoole官网，安装完后使用命令：

php -m

查看是否安装成功。注意：Swoole从2.0版本开始支持了内置协程，需使用PHP7。

基于TCP的邮件服务器

使用Swoole提供TCP服务，异步任务发送邮件。

邮件功能：

PHPMailer

PHP主代码：

 'swoole.log',    'worker_num' => 4, // 4个工作进程    'task_worker_num' => 10, // 10个任务进程];$server = new swoole_server("127.0.0.1", 9501);$server->set($setting);$server->on('WorkerStart', array($object, 'onWorkerStart'));$server->on('Connect', array($object, 'onConnect'));$server->on('Receive', array($object, 'onReceive'));$server->on('Close', array($object, 'onClose'));$server->on('Task', array($object, 'onTask'));$server->on('Finish', array($object, 'onFinish'));$server->start();class MailServer{    /** @var Mail */    private $handle;    public function __construct()    {        require 'Mail.php'; // PHPMailer邮件服务类    }    public function onWorkerStart($server, $workerId)    {        $mailConfig = require 'MailConfig.php'; // 发件人信息，重启时会重新加载配置文件        $this->handle = new Mail($mailConfig);    }    public function onConnect($server, $fd, $reactorId)    {    }    public function onReceive($server, $fd, $reactorId, $data)    {        $return = [];        $dataArr = json_decode($data, true);        if (empty($dataArr) || empty($dataArr['address']) || empty($dataArr['subject']) || empty($dataArr['body'])) {            $return['code'] = -1;            $return['msg'] = '参数不能为空';        } else { // 参数校验成功            $server->task($data); // 投递一个任务            $return['code'] = 0;            $return['msg'] = '投递任务成功';        }        $server->send($fd, json_encode($return));    }    public function onTask($server, $taskId, $workerId, $data)    {        $data = json_decode($data, true);        $this->handle->send($data['address'], $data['subject'], $data['body']); // 发送邮件    }    public function onFinish($server, $task_id, $data)    {    }    public function onClose($server, $fd, $reactorId)    {    }}

发件人信息配置：

 'smtp.qq.com',    'port' => '465',    'fromName' => 'Mr.litt',    'username' => '137057181@qq.com',    'password' => '',];

PHPMailer邮件服务类：

host = $config['host'];        !empty($config['port']) && $this->port = $config['port'];        !empty($config['fromName']) && $this->fromName = $config['fromName'];        !empty($config['username']) && $this->username = $config['username'];        !empty($config['password']) && $this->password = $config['password'];        if (empty($this->host) || empty($this->port) || empty($this->fromName) ||            empty($this->username) || empty($this->password)) {            throw new Exception('发件人信息错误');        }    }    public function send($address, $subject, $body)    {        if (empty($address) || empty($subject) || empty($body)) {            throw new Exception('收件人信息错误');        }        // 实例化PHPMailer核心类        $mail = new PHPMailer();        // 是否启用smtp的debug进行调试 开发环境建议开启 生产环境注释掉即可 默认关闭debug调试模式        $mail->SMTPDebug = 0;        // 使用smtp鉴权方式发送邮件        $mail->isSMTP();        // smtp需要鉴权 这个必须是true        $mail->SMTPAuth = true;        // 链接邮箱的服务器地址        $mail->Host = $this->host;        // 设置使用ssl加密方式登录鉴权        $mail->SMTPSecure = 'ssl';        // 设置ssl连接smtp服务器的远程服务器端口号        $mail->Port = $this->port;        // 设置发送的邮件的编码        $mail->CharSet = 'UTF-8';        // 设置发件人昵称 显示在收件人邮件的发件人邮箱地址前的发件人姓名        $mail->FromName = $this->fromName;        // smtp登录的账号 QQ邮箱即可        $mail->Username = $this->username;        // smtp登录的密码 使用生成的授权码        $mail->Password = $this->password;        // 设置发件人邮箱地址 同登录账号        $mail->From = $this->username;        // 邮件正文是否为html编码 注意此处是一个方法        $mail->isHTML(true);        // 设置收件人邮箱地址        $mail->addAddress($address);        // 添加多个收件人 则多次调用方法即可        //$mail->addAddress('87654321@163.com');        // 添加该邮件的主题        $mail->Subject = $subject;        // 添加邮件正文        $mail->Body = $body;        // 为该邮件添加附件        //$mail->addAttachment('./example.pdf');        // 发送邮件 返回状态        $status = $mail->send();        return $status;    }}

注意事项：

修改发件人信息后，只需重启task_worker就生效，命令 kill -USER1 主进程PID。TCP客户端可使用swoole_client类来模拟。短信、推送等异步任务同样适用于此场景。

基于WebSocket多房间聊天功能

使用Swoole提供WebSocket服务，使用Redis保存房间人员信息。

PHP主代码：

 'swoole_ws.log',    'worker_num' => 4, // 4个工作进程];$ws = new swoole_websocket_server("127.0.0.1", 9502);$ws->set($setting);$ws->on('WorkerStart', array($object, 'onWorkerStart'));$ws->on('open', array($object, 'onOpen'));$ws->on('message', array($object, 'onMessage'));$ws->on('close', array($object, 'onClose'));$ws->start();class ChatServer{    /** @var  Redis */    private $redis;    public function __construct()    {        echo "启动前清理数据";        $redis = new Redis();        $redis->connect('127.0.0.1', 6379);        if ($redis->ping() != '+PONG') {            echo "redis连接失败";exit;        }        $delKeys = $redis->keys('fd_*');        foreach ($delKeys as $key) {            $redis->del($key);        }        $delKeys = $redis->keys('roomId_*');        foreach ($delKeys as $key) {            $redis->del($key);        }    }    public function onWorkerStart($ws, $workerId)    {        $redis = new Redis();        $redis->connect('127.0.0.1', 6379);        if ($redis->ping() != '+PONG') {            echo "redis连接失败";        }        $this->redis = $redis;    }    public function onOpen($ws, $request)    {        echo "fd:{$request->fd} is open";        if (empty($request->get['roomId']) || empty($request->get['nick'])) {            $status = 'fail';        } else {            //建立身份关联            $this->redis->hSet("fd_".$request->fd, 'roomId', $request->get['roomId']);            $this->redis->hSet("fd_".$request->fd, 'nick', $request->get['nick']);            $this->redis->sAdd("roomId_".$request->get['roomId'], $request->fd);            $status = 'success';        }        $sendData = [            'cmd' => 'open',            'data' => [                'status' => $status            ]        ];        $ws->push($request->fd, json_encode($sendData));    }    public function onMessage($ws, $frame)    {        echo "fd:[$frame->fd}, Message: {$frame->data}";        if (!empty($frame->data)) {            $fdInfo = $this->redis->hGetAll("fd_".$frame->fd);            if (!empty($fdInfo['nick']) && !empty($fdInfo['roomId'])) {                $sendData = [                    'cmd' => 'ReceiveMessage',                    'data' => [                        'nick' => $fdInfo['nick'],                        'msg' => $frame->data,                    ]                ];                $fdArr = $this->redis->sMembers("roomId_".$fdInfo['roomId']);                foreach ($fdArr as $fd) {                    $ws->push($fd, json_encode($sendData));                }            }        }    }    public function onClose($ws, $fd, $reactorId)    {        echo "fd:{$fd} is closed";        //删除fd身份数据并在房间内移动该fd        $fdInfo = $this->redis->hGetAll("fd_".$fd);        if (!empty($fdInfo['roomId'])) {            $this->redis->sRem("roomId_".$fdInfo['roomId'], $fd);        }        $this->redis->del("fd_".$fd);    }}

注意事项：

1.Worker进程之间不能共享变量，这里使用Redis来共享数据。

2.Worker进程不能共用同一个Redis客户端，需要放到onWorkerStart中实例化。

3.客户端可使用JS内置等WebSokcet客户端，异步的PHP程序可使用SwooleHttpClient，同步可以使用swoole/framework提供的同步WebSocket客户端。

基于HTTP的简易框架

使用Swoole提供HTTP服务，模拟官方Swoole框架实现一个简易框架。

PHP主代码：

 'swoole_http.log',    'worker_num' => 4, // 4个工作进程];$server = new swoole_http_server("127.0.0.1", 9503);$server->set($setting);$server->on('request', array($object, 'onRequest'));$server->on('close', array($object, 'onClose'));$server->start();/** * Class AppServer * @property swoole_http_request $request * @property swoole_http_response $response * @property PDO $db * @property libSession $session */class AppServer{    private $module = [];    /** @var AppServer */    private static $instance;    public static function getInstance()    {        return self::$instance;    }    public function __construct()    {        $baseControllerFile = __DIR__ .'/controller/Base.php';        require_once "$baseControllerFile";    }    /**     * @param swoole_http_request $request     * @param swoole_http_response $response     */    public function onRequest($request, $response)    {        $this->module['request'] = $request;        $this->module['response'] = $response;        self::$instance = $this;        list($controllerName, $methodName) = $this->route($request);        empty($controllerName) && $controllerName = 'index';        empty($methodName) && $methodName = 'index';        try {            $controllerClass = "controller" . ucfirst($controllerName);            $controllerFile = __DIR__ . "/controller/" . ucfirst($controllerName) . ".php";            if (!class_exists($controllerClass, false)) {                if (!is_file($controllerFile)) {                    throw new Exception('控制器不存在');                }                require_once "$controllerFile";            }            $controller = new $controllerClass($this);            if (!method_exists($controller, $methodName)) {                throw new Exception('控制器方法不存在');            }            ob_start();            $return = $controller->$methodName();            $return .= ob_get_contents();            ob_end_clean();            $this->session->end();            $response->end($return);        } catch (Exception $e) {            $response->status(500);            $response->end($e->getMessage());        }    }    private function route($request)    {        $pathInfo = explode('/', $request->server['path_info']);        return [$pathInfo[1], $pathInfo[2]];    }    public function onClose($server, $fd, $reactorId)    {    }    public function __get($name)    {        if (!in_array($name, array('request', 'response', 'db', 'session'))) {            return null;        }        if (empty($this->module[$name])) {            $moduleClass = "lib" . ucfirst($name);            $moduleFile = __DIR__ . '/lib/' . ucfirst($name) . ".php";            if (is_file($moduleFile)) {                require_once "$moduleFile";                $object = new $moduleClass;                $this->module[$name] = $object;            }        }        return $this->module[$name];    }}

使用header和setCooike示例：

response->status(302);        //使用此函数代替PHP的header函数        $this->response->header('Location', 'http://www.baidu.com/');    }    public function cookie()    {        $this->response->cookie('http_cookie','http_cookie_value');    }}

Session实现：

cookieKey = 'PHPSESSID';        $this->storeDir = 'tmp/';        $this->isStart = false;    }    public function start()    {        $this->isStart = true;        $appServer = AppServer::getInstance();        $request = $appServer->request;        $response = $appServer->response;        $sessionId = $request->cookie[$this->cookieKey];        if (empty($sessionId)){            $sessionId = uniqid();            $response->cookie($this->cookieKey, $sessionId);        }        $this->sessionId = $sessionId;        $storeFile = $this->storeDir . $sessionId;        if (!is_file($storeFile)) {            touch($storeFile);        }        $session = $this->get($storeFile);        $_SESSION = $session;    }    public function end()    {        $this->save();    }    public function commit()    {        $this->save();    }    private function save()    {        if ($this->isStart) {            $data = json_encode($_SESSION);            ftruncate($this->file, 0);            if ($data) {                rewind($this->file);                fwrite($this->file, $data);            }            flock($this->file, LOCK_UN);            fclose($this->file);        }    }    private function get($fileName)    {        $this->file = fopen($fileName, 'c+b');        if(flock($this->file, LOCK_EX | LOCK_NB)) {            $data = [];            clearstatcache();            if (filesize($fileName) > 0) {                $data = fread($this->file, filesize($fileName));                $data = json_decode($data, true);            }            return $data;        }    }}

注意事项：

使用Redis／MySQL等客户端理应使用线程池，参照官方Swoole框架。Swoole是在执行PHP文件这一阶段进行接管，因此header，setCooike，seesion_start不可用，header和setCooike可用$response变量实现，Session可自行实现。推荐查看官方框架：Swoole框架。

上述demo可以戳这里：demo

总结

Swoole的应用远不如此，Swoole就像打开了PHP世界的新大门，我觉得每一位PHPer都应该学习和掌握Swoole的用法，能学到很多使用LAMP／LNMP模式时未涉及到的知识点。

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