什么是webSocket
webSocket协议是基于TCP的一种新的网络协议。它实现了浏览器与服务器全双工（full-duplex）通信——允许服务器主动发送信息给客户端。
websocket特点
1.建立在TCP协议之上
2. 性能开销小通信高效
3.客户端可以与任意服务器通信
4.协议标识符ws wss
5.持久化网络通信协议
后端示例代码
<?php
/**
* Created by PhpStorm.
* User: baidu
* Date: 18/3/1
* Time: 下午11:45
*/
$server = new swoole_websocket_server("0.0.0.0", 8812);
//$server->set([]);
$server->set(
[
'enable_static_handler' => true,
'document_root' => "/home/work/hdtocs/swoole_mooc/data",
]
);
//监听websocket连接打开事件
$server->on('open', 'onOpen');
function onOpen($server, $request) {
print_r($request->fd);
}
// 监听ws消息事件
$server->on('message', function (swoole_websocket_server $server, $frame) {
echo "receive from {$frame->fd}:{$frame->data},opcode:{$frame->opcode},fin:{$frame->finish}\n";
$server->push($frame->fd, "singwa-push-secesss");
});
$server->on('close', function ($ser, $fd) {
echo "client {$fd} closed\n";
});
$server->start();客户端代码
扫描二维码关注公众号，回复：
1899906 查看本文章
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<h1>singwa-swoole-ws测试<h1>
<script>
var wsUrl = "ws://singwa.swoole.com:8812";
var websocket = new WebSocket(wsUrl);
//实例对象的onopen属性
websocket.onopen = function(evt) {
websocket.send("hello-sinwa");
console.log("conected-swoole-success");
}
// 实例化 onmessage
websocket.onmessage = function(evt) {
console.log("ws-server-return-data:" + evt.data);
}
//onclose
websocket.onclose = function(evt) {
console.log("close");
}
//onerror
websocket.onerror = function(evt, e) {
console.log("error:" + evt.data);
}
</script>
</body>
</html>