|
websocket连接失败，报错：WebSocket connection to 'ws://127.0.0.1:8888/' failed: Error during WebSocket handshake: Response must not include 'Sec-WebSocket-Protocol' header if not present in request: chat
遇到这个问题怎么解决呢？有两种方法
function handleShake($request){
preg_match("/Sec-WebSocket-Key: (.*) /",$request,$match); $key = $match[1]; $new_key = base64_encode(sha1($key.'258EAFA5-E914-47DA-95CA-C5AB0DC85B11',true)); $response = "HTTP/1.1 101 Switching Protocols "; $response .= "Upgrade: websocket "; $response .= "Connection: Upgrade "; $response .= "Sec-WebSocket-Accept: $new_key ";//在这行多加一个" " //$response .= "Sec-WebSocket-Protocol: chat ";//注释掉这行 return $response; } 后端完整代码如下：
<?php
$socket = socket_create(AF_INET,SOCK_STREAM,SOL_TCP); socket_set_option($socket,SOL_SOCKET,SO_REUSEADDR,true); socket_bind($socket,0,8888); socket_listen($socket); while(true){ $conSock = socket_accept($socket); $request = socket_read($conSock,1024); $response = handleShake($request); socket_write($conSock,$response,strlen($response)); $res = socket_read($conSock,1024); echo decode($res); $str = encode('hello client'); socket_write($conSock,$str,strlen($str)); } function encode($msg) { $frame = []; $frame[0] = '81'; $len = strlen($msg); if ($len < 126) { $frame[1] = $len < 16 ? '0' . dechex($len) : dechex($len); } else if ($len < 65025) { $s = dechex($len); $frame[1] = '7e' . str_repeat('0', 4 - strlen($s)) . $s; } else { $s = dechex($len); $frame[1] = '7f' . str_repeat('0', 16 - strlen($s)) . $s; } $data = ''; $l = strlen($msg); for ($i = 0; $i < $l; $i++) { $data .= dechex(ord($msg{$i})); } $frame[2] = $data; $data = implode('', $frame); return pack("H*", $data); } function handleShake($request){ preg_match("/Sec-WebSocket-Key: (.*) /",$request,$match); $key = $match[1]; $new_key = base64_encode(sha1($key.'258EAFA5-E914-47DA-95CA-C5AB0DC85B11',true)); $response = "HTTP/1.1 101 Switching Protocols "; $response .= "Upgrade: websocket "; $response .= "Connection: Upgrade "; $response .= "Sec-WebSocket-Accept: $new_key "; //$response .= "Sec-WebSocket-Protocol: chat "; return $response; } function decode($buffer) { $decoded = ''; $len = ord($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; } 二、第二种方法是在前端websocket连接里面，加一个参数'chat'，第二种方法不需要在php中去掉Sec-WebSocket-Protocol这行。
<script>
const socket = new WebSocket('ws://127.0.0.1:8888','chat'); console.log(socket) socket.onopen = function(){ console.log('connected success'); socket.send('hello server'); } socket.onmessage = function(e){ console.log(e.data) } </script> |
