WebSocket 异步风格服务器
WebSocket\Server 继承自 Http\Server，所以 Http\Server 提供的所有 API 和配置项都可以使用。
# ws_server.php
class WebSocket
{
public $server;
public function __construct()
{
// 创建websocket服务器对象，监听0.0.0.0:9502端口
$this->server = new Swoole\WebSocket\Server("0.0.0.0", 9502);
// 设置服务器运行参数
$serv->set(array(
'daemonize' => 1, // 作为守护进程运行，需同时设置log_file
'log_file' => '/www/logs/swoole.log', // 指定标准输出和错误日志文件
));
// 监听WebSocket连接打开事件
$this->server->on('open', function ($ws, $request) {
var_dump($request->fd, $request->get, $request->server);
$ws->push($request->fd, "hello, welcome\n");
});
// 监听WebSocket消息事件
$this->server->on('message', function ($ws, $frame) {
echo "receive from {$frame->fd}:{$frame->data},opcode:{$frame->opcode},fin:{$frame->finish}\n";
$ws->push($frame->fd, "server: {$frame->data}");
});
// 监听WebSocket连接关闭事件
$this->server->on('close', function ($ws, $fd) {
echo "client {$fd} is closed\n";
});
// 通过 HTTP 请求向所有用户推送消息
$this->server->on('request', function ($request, $response) {
foreach ($this->server->connections as $fd) {
// 检查连接是否为有效的 WebSocket 客户端连接，避免push失败
if ($this->server->isEstablished($fd)) {
$this->server->push($fd, $request->get['message']);
}
}
});
$this->server->start();
}
}
// 启动 WebSocket 服务器
new WebSocket();
运行并测试 WebSocket 异步风格服务器
# 如果程序已经运行，先结束进程
kill -9 11591
# 在 cli 命令行环境运行服务端
php ws_server.php
# 查看服务器监听的端口
netstat -an | grep 9502
WebSocket JS客户端
# index.js
var wsServer = 'ws://127.0.0.1:9502';
var websocket = new WebSocket(wsServer);
websocket.onopen = function (evt) {
console.log("Connected to WebSocket server.");
websocket.send('hello ws!');
};
websocket.onclose = function (evt) {
console.log("Disconnected");
};
websocket.onmessage = function (evt) {
console.log('Retrieved data from server: ' + evt.data);
};
websocket.onerror = function (evt, e) {
console.log('Error occured: ' + evt.data);
};
客户端
Chrome/Firefox/高版本IE/Safari等浏览器内置了JS语言的WebSocket客户端- 微信小程序开发框架内置的
WebSocket客户端 - 异步 IO 的
PHP程序中可以使用 Swoole\Coroutine\Http 作为WebSocket客户端 Apache/PHP-FPM或其他同步阻塞的PHP程序中可以使用swoole/framework提供的同步 WebSocket 客户端- 非
WebSocket客户端不能与WebSocket服务器通信
WebSocket 协程风格服务器
Co\run(function () {
$server = new Co\Http\Server("127.0.0.1", 9502, false);
$server->handle('/websocket', function ($request, $ws) {
// 向客户端发送 WebSocket 握手消息
$ws->upgrade();
// 循环处理消息的接收和发送
while (true) {
// 接收 WebSocket 消息帧，会挂起当前协程，等待数据到来时再恢复协程的执行
$frame = $ws->recv();
if ($frame === false) {
echo "error : " . swoole_last_error() . "\n";
break;
} else if ($frame == '') {
break;
} else {
if ($frame->data == "close") {
$ws->close();
return;
}
// 向对端发送数据帧
$ws->push("Hello {$frame->data}!");
$ws->push("How are you, {$frame->data}?");
}
}
});
$server->handle('/', function ($request, $response) {
$response->end(<<<HTML
<h1>Swoole WebSocket Server</h1>
<script>
var wsServer = 'ws://127.0.0.1:9502/websocket';
var websocket = new WebSocket(wsServer);
websocket.onopen = function (evt) {
console.log("Connected to WebSocket server.");
websocket.send('hello');
};
websocket.onclose = function (evt) {
console.log("Disconnected");
};
websocket.onmessage = function (evt) {
console.log('Retrieved data from server: ' + evt.data);
};
websocket.onerror = function (evt, e) {
console.log('Error occured: ' + evt.data);
};
</script>
HTML
);
});
$server->start();
});