标题：Websocket通信实例，配合后端php
出处：刘新修
时间：Tue, 27 Sep 2016 21:14:17 +0000
作者：刘新修
地址：http://liuxinxiu.com:80/WebSocket/
内容：
本站测试实例访问地址: http://code.liuxinxiu.com/php/Interface/html/WebSocket.html
XML/HTML代码
chatdemo
后端PHP代码部分：
PHP代码
2.php code: 'system', 'message'=>$ip.' connected'))); send_message($response); $found_socket = array_search($socket, $changed); unset($changed[$found_socket]); } //轮询 每个client socket 连接 foreach ($changed as $changed_socket) { //如果有client数据发送过来 while(socket_recv($changed_socket, $buf, 1024, 0) >= 1) { //解码发送过来的数据 $received_text = unmask($buf); $tst_msg = json_decode($received_text); $user_name = $tst_msg->name; $user_message = $tst_msg->message; //把消息发送回所有连接的 client 上去 $response_text = mask(json_encode(array('type'=>'usermsg', 'name'=>$user_name, 'message'=>$user_message))); send_message($response_text); break 2; } //检查offline的client $buf = @socket_read($changed_socket, 1024, PHP_NORMAL_READ); if ($buf === false) { $found_socket = array_search($changed_socket, $clients); socket_getpeername($changed_socket, $ip); unset($clients[$found_socket]); $response = mask(json_encode(array('type'=>'system', 'message'=>$ip.' disconnected'))); send_message($response); } } } // 关闭监听的socket socket_close($sock); //发送消息的方法 function send_message($msg) { global $clients; foreach($clients as $changed_socket) { @socket_write($changed_socket,$msg,strlen($msg)); } return true; } //解码数据 function unmask($text) { $length = ord($text[1]) & 127; if($length == 126) { $masks = substr($text, 4, 4); $data = substr($text, 8); } elseif($length == 127) { $masks = substr($text, 10, 4); $data = substr($text, 14); } else { $masks = substr($text, 2, 4); $data = substr($text, 6); } $text = ""; for ($i = 0; $i < strlen($data); ++$i) { $text .= $data[$i] ^ $masks[$i%4]; } return $text; } //编码数据 function mask($text) { $b1 = 0x80 | (0x1 & 0x0f); $length = strlen($text); if($length <= 125) $header = pack('CC', $b1, $length); elseif($length > 125 && $length < 65536) $header = pack('CCn', $b1, 126, $length); elseif($length >= 65536) $header = pack('CCNN', $b1, 127, $length); return $header.$text; } //握手的逻辑 function perform_handshaking($receved_header,$client_conn, $host, $port) { $headers = array(); $lines = preg_split("/\r\n/", $receved_header); foreach($lines as $line) { $line = chop($line); if(preg_match('/\A(\S+): (.*)\z/', $line, $matches)) { $headers[$matches[1]] = $matches[2]; } } $secKey = $headers['Sec-WebSocket-Key']; $secAccept = base64_encode(pack('H*', sha1($secKey . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11'))); $upgrade = "HTTP/1.1 101 Web Socket Protocol Handshake\r\n" . "Upgrade: websocket\r\n" . "Connection: Upgrade\r\n" . "WebSocket-Origin: $host\r\n" . "WebSocket-Location: ws://$host:$port/demo/shout.php\r\n". "Sec-WebSocket-Accept:$secAccept\r\n\r\n"; socket_write($client_conn,$upgrade,strlen($upgrade)); }
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