112 lines
2.8 KiB
PHP
112 lines
2.8 KiB
PHP
<?php
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namespace Ratchet\Protocol\WebSocket\Version;
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class Hybi10 implements VersionInterface {
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const GUID = '258EAFA5-E914-47DA-95CA-C5AB0DC85B11';
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/**
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*/
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public function handshake(array $headers) {
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$key = $this->sign($headers['Sec-Websocket-Key']);
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return array(
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'' => 'HTTP/1.1 101 Switching Protocols'
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, 'Upgrade' => 'websocket'
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, 'Connection' => 'Upgrade'
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, 'Sec-WebSocket-Accept' => $this->sign($headers['Sec-Websocket-Key'])
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// , 'Sec-WebSocket-Protocol' => ''
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);
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}
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/**
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* Unframe a message received from the client
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* Thanks to @lemmingzshadow for the code on decoding a HyBi-10 frame
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* @link https://github.com/lemmingzshadow/php-websocket
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* @param string
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* @return string
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* @throws UnexpectedValueException
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*/
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public function unframe($message) {
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$data = $message;
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$payloadLength = '';
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$mask = '';
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$unmaskedPayload = '';
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$decodedData = array();
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// estimate frame type:
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$firstByteBinary = sprintf('%08b', ord($data[0]));
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$secondByteBinary = sprintf('%08b', ord($data[1]));
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$opcode = bindec(substr($firstByteBinary, 4, 4));
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$isMasked = ($secondByteBinary[0] == '1') ? true : false;
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$payloadLength = ord($data[1]) & 127;
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// close connection if unmasked frame is received:
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if($isMasked === false) {
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throw new \UnexpectedValueException('Masked byte is false');
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}
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switch($opcode) {
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// text frame:
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case 1:
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$decodedData['type'] = 'text';
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break;
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// connection close frame:
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case 8:
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$decodedData['type'] = 'close';
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break;
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// ping frame:
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case 9:
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$decodedData['type'] = 'ping';
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break;
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// pong frame:
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case 10:
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$decodedData['type'] = 'pong';
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break;
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default:
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// Close connection on unknown opcode:
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throw new UnexpectedValueException('Unknown opcode');
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break;
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}
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if($payloadLength === 126) {
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$mask = substr($data, 4, 4);
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$payloadOffset = 8;
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} elseif($payloadLength === 127) {
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$mask = substr($data, 10, 4);
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$payloadOffset = 14;
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} else {
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$mask = substr($data, 2, 4);
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$payloadOffset = 6;
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}
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$dataLength = strlen($data);
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if($isMasked === true) {
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for($i = $payloadOffset; $i < $dataLength; $i++) {
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$j = $i - $payloadOffset;
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$unmaskedPayload .= $data[$i] ^ $mask[$j % 4];
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}
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$decodedData['payload'] = $unmaskedPayload;
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} else {
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$payloadOffset = $payloadOffset - 4;
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$decodedData['payload'] = substr($data, $payloadOffset);
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}
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return $decodedData;
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}
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/**
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* @todo Complete this method
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*/
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public function frame($message) {
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return $message;
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}
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public function sign($key) {
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return base64_encode(sha1($key . static::GUID, 1));
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}
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} |