PHP JavaScript客户端WebSocket无法接收超过125个字节的数据

Question

我在服务器端使用PHP套接字，在客户端使用JavaScript套接字。握手，取消屏蔽和屏蔽对于长度不超过125的消息正常工作，但是问题是，当服务器发送的数据超过125个字节时，客户端套接字不会接收到数据并自动关闭。

这是我正在使用的代码：

private function unmask($payload) {
  $length = ord($payload[1]) & 127;

  if($length == 126) {
    $masks = substr($payload, 4, 4);
    $data = substr($payload, 8);
    $len = (ord($payload[2]) << 8) + ord($payload[3]);
  }
  elseif($length == 127) {
    $masks = substr($payload, 10, 4);
    $data = substr($payload, 14);
    $len = (ord($payload[2]) << 56) + (ord($payload[3]) << 48) + (ord($payload[4]) << 40) + (ord($payload[5]) << 32) + (ord($payload[6]) << 24) + (ord($payload[7]) << 16) + (ord($payload[8]) << 8) + ord($payload[9]);
  }
  else {
    $masks = substr($payload, 2, 4);
    $data = substr($payload, 6);
    $len = $length;
  }

  $text = '';
  for ($i = 0; $i < $len; ++$i) {
    $text .= $data[$i] ^ $masks[$i%4];
  }
  return $text;
}

private function encode($text) {
  // 0x1 text frame (FIN + opcode)
  $b1 = 0x80 | (0x1 & 0x0f);
  $length = strlen($text);

  if($length <= 125)
    $header = pack('CC', $b1, $length);
  elseif($length > 125 && $length < 65536)
    $header = pack('CCS', $b1, 126, $length);
  elseif($length >= 65536)
    $header = pack('CCN', $b1, 127, $length);

  return $header.$text;
}

private function handshake($buffer,$socket,$socket_index) {
  list($resource,$host,$origin,$key) = $this->getSocketKeyFromHeaders($buffer);
  $retkey = base64_encode(sha1($key."258EAFA5-E914-47DA-95CA-C5AB0DC85B11",true));
  $upgrade  = "HTTP/1.1 101 Switching Protocols\r\nUpgrade: websocket\r\nConnection: Upgrade\r\nSec-WebSocket-Accept: {$retkey}\r\n\r\n";
  $this->handshakes[$socket_index] = true;
  socket_write($socket,$upgrade,strlen($upgrade));
  echo $this->output("Done handshaking...\n");
}

private function getSocketKeyFromHeaders($req) {
  $req  = substr($req,4); /* RegEx kill babies */
  $res  = substr($req,0,strpos($req," HTTP"));
  $req  = substr($req,strpos($req,"Host:")+6);
  $host = substr($req,0,strpos($req,"\r\n"));
  $req  = substr($req,strpos($req,"Sec-WebSocket-Key: ")+19);
  $key  = trim(substr($req,0,strpos($req,"\r\n")));
  $req  = substr($req,strpos($req,"Origin:")+8);
  $ori  = substr($req,0,strpos($req,"\r\n"));

  return array($res,$host,$ori,$key);
}