在线客服~~
Posted 悦~
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SOCKET流程:
1:服务器端开启端口等待客户端建立TCP连接
2:客户端建立TCP四次握手协议TCP连接 (TCP的四次握手连接全部被封装好的代码处理)
3: 客户端发起WS协议
4:服务器判断 客户端发送消息内容即是WS协议请求
5:服务器端返回WS连接协议
6:双方建立WS长连接
7:此时客户端可以接受服务器推送过来的内容(接受WS加密内容),也可以向服务器端发送内容(服务端解码WS加密内容)。
双方关闭SOCKET
先看下效果~~有待加强
(1)要先链接啊,链接成功后才可以发送消息
(2)下面就是代码的生成了
先要编写页面,先不写链接(界面中的各个按钮)
<textarea class="log" style="width: 100%; height: 500px;"> =======websocket====== </textarea>
<input type="button" value="连接" onClick="link()"> <input type="button" value="断开" onClick="dis()"> <input type="text" id="text"> <input type="button" value="发送" onClick="send()">
(3)编写链接功能
<?php class WS { //存储连接资源 private $clients; //主线端口 private $master; //客户资源 private $user; private $ip; private $port; public function __construct($ip="127.0.0.1",$port = 3432) { $this->ip = $ip; $this->port = $port; error_reporting(E_ALL); set_time_limit(0); ob_implicit_flush(); $this->master = $this->WebSocket($this->ip,$this->port); $this->clients = array(\'s\'=>$this->master); } //建立服务器端连接 function WebSocket($address,$port){ $server = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); socket_set_option($server, SOL_SOCKET, SO_REUSEADDR, 1); socket_bind($server, $address, $port); socket_listen($server); $this->log(\'开始监听: \'.$address.\' : \'.$port); return $server; } function run() { while (true) { $read = $this->clients; //var_dump($read);exit; @socket_select($read, $write = NULL, $except = NULL, null); /*if ( < 1) { //如果没有连接跳出 continue; }*/ foreach($read as $r) { if($r == $this->master) { //建立四步握手协议 //有客户端新进连接进来 //判断服务器socket是否被激活 //接受客户端,并将他添加到客户数组 $this->clients[] = $newCli = socket_accept($this->master); $this->user[] = array( \'handle\'=>false, \'socket\'=>$newCli ); $k = $this->search($newCli); echo "NUM = ".$k."\\n"; //服务器端输出当前连接的 用户ID,既是数组K } else { //已有的连接发来的消息所有的客户数据读取 // 读到换行符或1024字节 // 虽然客户端断开连接时显示错误,所以沉默错误消息 $buffer = \'\'; $data = socket_recv($r,$buffer ,2048,0); // 检查客户端是否断开连接 if ($data < 7) { // 删除客户端为客户数组 $k = $this->search($r); echo "NO---".$k; $this->close($r); // continue to the next client to read from continue; } $k = $this->search($r); if($this->user[$k][\'handle\'] == false) { //只是进行了四步握手协议,此时浏览器发来WS协议请求 echo "$k=".$k."\\n"; $this->handshake($k,$buffer); //返回WS协议应答 } else { //已经建立WS协议,获取通过WS发来的消息 $str = $this->uncode($buffer); echo "\\n".$str; $this->sendAll($str,$r); //发送消息广播 } } } } } //WebSocket 握手协议 function handshake($k,$buffer){ //获取KEY及生成新的KEY $buf = substr($buffer,strpos($buffer,\'Sec-WebSocket-Key:\')+18); $key = trim(substr($buf,0,strpos($buf,"\\r\\n"))); $new_key = base64_encode(sha1($key."258EAFA5-E914-47DA-95CA-C5AB0DC85B11",true)); //返回HTTP协议 $new_message = "HTTP/1.1 101 Switching Protocols\\r\\n"; $new_message .= "Upgrade: websocket\\r\\n"; $new_message .= "Sec-WebSocket-Version: 13\\r\\n"; $new_message .= "Connection: Upgrade\\r\\n"; $new_message .= "Sec-WebSocket-Accept: " . $new_key . "\\r\\n\\r\\n"; socket_write($this->user[$k][\'socket\'],$new_message,strlen($new_message)); $this->user[$k][\'handle\']=true; return true; } //群发消息 function sendAll($str,$socket) { // 把这所有的客户在客户数组(除了第一个,这是一个监听套接字) foreach ($this->clients as $send_sock) { // 如果这个资源等于 服务器或是等于它自己则跳过, if ($send_sock == $this->master || $send_sock == $socket) continue; //发送给其他用户一个信息 $data = $this->code($str); socket_write($send_sock, $data,strlen($data)); } } //查找用户 function search($sign) {//通过标示遍历获取id foreach ($this->user as $k=>$v){ if($sign == $v[\'socket\']) return $k; } return false; } //断开连接 function close($sign){//通过标示断开连接 $k = array_search($sign, $this->clients); socket_close($sign); //断开的连接需要在服务器端手动关闭 unset($this->clients[$k]); unset($this->user[$k]); } //信息解码 function uncode($str){ $mask = array(); $data = \'\'; $msg = unpack(\'H*\',$str); $head = substr($msg[1],0,2); if (hexdec($head{1}) === 8) { $data = false; }else if (hexdec($head{1}) === 1){ $mask[] = hexdec(substr($msg[1],4,2)); $mask[] = hexdec(substr($msg[1],6,2)); $mask[] = hexdec(substr($msg[1],8,2)); $mask[] = hexdec(substr($msg[1],10,2)); $s = 12; $e = strlen($msg[1])-2; $n = 0; for ($i=$s; $i<= $e; $i+= 2) { $data .= chr($mask[$n%4]^hexdec(substr($msg[1],$i,2))); $n++; } } return $data; } //信息加码 function code($msg){ $msg = preg_replace(array(\'/\\r$/\',\'/\\n$/\',\'/\\r\\n$/\',), \'\', $msg); $frame = array(); $frame[0] = \'81\'; $len = strlen($msg); $frame[1] = $len<16?\'0\'.dechex($len):dechex($len); $frame[2] = $this->ord_hex($msg); $data = implode(\'\',$frame); return pack("H*", $data); } function ord_hex($data) { $msg = \'\'; $l = strlen($data); for ($i= 0; $i<$l; $i++) { $msg .= dechex(ord($data{$i})); } return $msg; } function log($t){//控制台输出 $t=$t."\\r\\n"; fwrite(STDOUT, iconv(\'utf-8\',\'gbk//IGNORE\',$t)); } } $ws = new WS("127.0.0.1",8000); $ws->run();
(4)写js(就是单击链接按钮和断开按钮出现的字)记得要引入jq
function link(){ var url=\'ws://127.0.0.1:8000\'; socket=new WebSocket(url); socket.onopen=function(){ log(\'连接成功\'); } socket.onmessage=function(msg) { log(\'获得消息:\'+msg.data); console.log(msg); } socket.onclose=function(){log(\'断开连接\')} } function dis(){ socket.close(); socket=null; } function log(var1){ $(\'.log\').append(var1+"\\r\\n"); } function send(){ socket.send($(\'#text\').val()); }
这样,简单的在线客服就完成了
在运行的时候要先运行ws,这样才能链接成功
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