用swoole和websocket开发简单聊天室

时间:2024-08-18 17:35:08

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' => ,
'worker_num' => ,
'task_worker_num' => ,
'max_request' => ,
'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' => , // 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 == ) {
$('#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 == ) {
$('#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