用swoole和websocket开发简单聊天室
首先,我想说下写代码的一些习惯,第一,任何可配置的参数或变量都要写到一个config文件中。第二,代码中一定要有日志记录和完善的报错并记录报错。言归正传,swoole应该是每个phper必须要了解的,它号称重新定义了php。此聊天室利用了swoole高并发并且异步非阻塞的特点提高了程序的性能。
首先,定义一个 swoole_lock 和 swoole_websocket_server ,并且配置参数,具体参数详情可以去swoole官网查看。
public function start()
{ $this->lock = new swoole_lock(SWOOLE_MUTEX); // 对文件或数组进行锁操作,已达到同步 $this->server = new swoole_websocket_server($this->addr, $this->port); // swoole提供的Websocket Server $this->server->set(array( 'daemonize' => 0, 'worker_num' => 4, 'task_worker_num' => 10, 'max_request' => 1000, 'log_file' => ROOT_PATH . 'storage\\logs\\swoole.log' // swoole日志路径,必须是绝对路径 )); $this->server->on('open', array($this, 'onOpen')); $this->server->on('message', array($this, 'onMessage')); $this->server->on('task', array($this, 'onTask')); $this->server->on('finish', array($this, 'onFinish')); $this->server->on('close', array($this, 'onClose'));
// 启动服务 $this->server->start(); }
当有客户端链接时,简单记录客户端的信息。
public function onOpen($server, $request) { $message = array( 'remote_addr' => $request->server['remote_addr'], 'request_time' => date('Y-m-d H:i:s', $request->server['request_time']) ); write_log($message); }
当有客户端发送信息时,对信息进行处理。
public function onMessage($server, $frame) { $data = json_decode($frame->data); switch ($data->type) { case 'init': case 'INIT': $this->users[$frame->fd] = $data->message; // 记录每个链接的信息,同样不要尝试打印出来看,因为你只能看到自己的链接信息 $message = '欢迎' . $data->message . '加入了聊天室'; $response = array( 'type' => 1, // 1代表系统消息,2代表用户聊天 'message' => $message ); break; case 'chat': case 'CHAT': $message = $data->message; $response = array( 'type' => 2, // 1代表系统消息,2代表用户聊天 'username' => $this->users[$frame->fd], 'message' => $message ); break; default: return false; }
// 将信息交给task处理 $this->server->task($response); } public function onTask($server, $task_id, $from_id, $message) {
// 迭代所有的客户端链接,将消息推送过去。(如果你尝试将 $this->server->connections 打印出来,那么你会发现他是空的。但当时用 foreach 去循环时,它确实有用。) foreach ($this->server->connections as $fd) { $this->server->push($fd, json_encode($message)); } $server->finish( 'Task' . $task_id . 'Finished' . PHP_EOL); }
最后,当客户端断开链接时,利用锁机制,同步删除客户端信息,并记录日志。
public function onClose($server, $fd) { $username = $this->users[$fd]; // 释放客户端,利用锁进行同步 $this->lock->lock(); unset($this->users[$fd]); $this->lock->unlock(); if( $username ) { $response = array( 'type' => 1, // 1代表系统消息,2代表用户聊天 'message' => $username . '离开了聊天室' ); $this->server->task($response); } write_log( $fd . ' disconnected'); }
服务端完了,下面就是客户端,很简单,只需要用websocket链接就ok!
// websocket let address = 'ws://<?php echo CLIENT_CONNECT_ADDR . ':' . CLIENT_CONNECT_PORT ?>'; let webSocket = new WebSocket(address); webSocket.onerror = function (event) { alert('服务器连接错误,请稍后重试'); }; webSocket.onopen = function (event) { if(!sessionStorage.getItem('username')) { setName(); }else { username = sessionStorage.getItem('username') webSocket.send(JSON.stringify({ 'message': username, 'type': 'init' })); } }; webSocket.onmessage = function (event) { console.log(event); let data = JSON.parse(event.data); if (data.type == 1) { $('#chat-list2').append('<li class="ui-border-tb"><span class="username">系统消息:</span><span class="message">' + data.message + '</span></li>'); } else if (data.type == 2) { $('#chat-list2').append('<li class="ui-border-tb"><span class="username">' + data.username + ':</span><span class="message">' + data.message + '</span></li>'); } }; webSocket.onclose = function (event) { alert('散了吧,服务器都关了'); };
详细代码可以去我的github下载