html js
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>聊天室</title>
<link rel="stylesheet" href="css/style.css">
<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
</head>
<body>
<div class="head"></div>
<div id="wrapper">
<div id="message">
</div>
<div id="action">
<textarea id="data"></textarea>
<button id="send">发送</button>
</div>
</div>
<script>
(function() {
var socket = new WebSocket('ws://127.0.0.1:8008');
var send = document.getElementById('send');
var data = document.getElementById('data');
var message = document.getElementById('message');
var wrapper = document.getElementById('wrapper');
var height = (wrapper.offsetHeight) -270;
message.style.height = height+'px';
socket.onopen = function(event) {
message.innerHTML = '<p><span>连接成功！</span></p>';
}
socket.onmessage = function(event) {
var dl = document.createElement('dl');
var jsonData = JSON.parse(event.data);
dl.innerHTML = "<dt><img src="+jsonData.avatar+"><dt><dd><span></span>"+jsonData.content+"</dd>";
message.appendChild(dl);
message.scrollTop = message.scrollHeight;
}
socket.onerror = function() {
message.innerHTML = '<p><span>连接失败！</span></p>';
}
send.addEventListener('click', function() {
var content = data.value;
if(content.length <= 0) {
alert('消息不能为空！');
return false;
}
var avatar = Math.random();
var message = {
"avatar" : 'images/avatar.jpg',
"content" : content
}
var json = JSON.stringify(message);
socket.send(json);
data.value = ''; data.focus();
});
})();
</script>
</body>
</html>
PHP
<?php
class WebSocket {
private $socket;
private $accept;
private $isHand = array();
public function __construct($host, $port, $max) {
$this->socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_set_option($this->socket, SOL_SOCKET, SO_REUSEADDR, TRUE);
socket_bind($this->socket, $host, $port);
socket_listen($this->socket, $max);
}
public function start() {
while(true) {
$cycle = $this->accept;
$cycle[] = $this->socket;
socket_select($cycle, $write, $except, null);
foreach($cycle as $sock) {
if($sock === $this->socket) {
$client = socket_accept($this->socket);
$this->accept[] = $client;
$key = array_keys($this->accept);
$key = end($key);
$this->isHand[$key] = false;
} else {
$length = socket_recv($sock, $buffer, 204800, 0);
$key = array_search($sock, $this->accept);
if($length < 7) {
$this->close($sock);
continue;
}
if(!$this->isHand[$key]) {
$this->dohandshake($sock, $buffer, $key);
} else {
// 先解码，再编码
$data = $this->decode($buffer);
$data = $this->encode($data);
// 判断断开连接（断开连接时数据长度小于10）
if(strlen($data) > 10) {
foreach($this->accept as $client) {
socket_write($client, $data, strlen($data));
}
}
}
}
}
}
}
/**
* 首次与客户端握手
*/
public function dohandshake($sock, $data, $key) {
if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $data, $match)) {
$response = base64_encode(sha1($match[1] . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));
$upgrade = "HTTP/1.1 101 Switching Protocol\r\n" .
"Upgrade: websocket\r\n" .
"Connection: Upgrade\r\n" .
"Sec-WebSocket-Accept: " . $response . "\r\n\r\n";
socket_write($sock, $upgrade, strlen($upgrade));
$this->isHand[$key] = true;
}
}
/**
* 关闭一个客户端连接
*/
public function close($sock) {
$key = array_search($sock, $this->accept);
socket_close($sock);
unset($this->accept[$key]);
unset($this->handshake[$key]);
}
/**
* 解码过程
*/
public function decode($buffer) {
$len = $masks = $data = $decoded = null;
$len = ord($buffer[1]) & 127;
if ($len === 126) {
$masks = substr($buffer, 4, 4);
$data = substr($buffer, 8);
}
else if ($len === 127) {
$masks = substr($buffer, 10, 4);
$data = substr($buffer, 14);
}
else {
$masks = substr($buffer, 2, 4);
$data = substr($buffer, 6);
}
for ($index = 0; $index < strlen($data); $index++) {
$decoded .= $data[$index] ^ $masks[$index % 4];
}
return $decoded;
}
/**
* 编码过程
*/
public function encode($buffer) {
$length = strlen($buffer);
if($length <= 125) {
return "\x81".chr($length).$buffer;
} else if($length <= 65535) {
return "\x81".chr(126).pack("n", $length).$buffer;
} else {
return "\x81".char(127).pack("xxxxN", $length).$buffer;
}
}
}
$webSocket = new WebSocket('127.0.0.1', 8008, 100);
$webSocket->start();
?>
