/**
* Build the instance of the handshake from the client data buffer
*
* @return bool Whether a complete handshake request has been received
*/
public function readClientHandshake(Buffer $buffer)
{
if (!$buffer->indexOf('/\\r?\\n\\r?\\n/', 0, Buffer::NEEDLE_REGEX) !== false) {
return false;
}
$this->complete = true;
$headers = $buffer->readLine('/\\r?\\n\\r?\\n/', Buffer::NEEDLE_REGEX);
$this->request->parseString($headers);
if ($this->request->getMethod() !== 'GET') {
throw new \RangeException('Invalid request - method must be GET');
}
if ($this->request->getHttpVersion() < 1.1) {
throw new \RangeException('Invalid request - request protocol version must be >=1.1');
}
$length = $this->request->getHeader('content-length');
if ($length && current($length)) {
throw new \RangeException('Invalid request - GET requests cannot contain a non-empty entity-body');
}
if (!$this->request->getHeader('host')) {
throw new \RangeException('Invalid request - missing Host: header');
}
if (!($key = $this->request->getHeader('sec-websocket-key'))) {
throw new \RangeException('Invalid request - missing Sec-Websocket-Key: header');
}
$key = current($key);
$this->response->addHeader('Sec-WebSocket-Accept', $this->buildSignature($key));
return true;
}
/**
* Construct a frame from the current pending frame header and a data buffer
*
* @param \WebSocketServer\Socket\Buffer $buffer The data buffer
*
* @return \WebSocketServer\Socket\Frame The constructed frame
*/
private function makeFrame(Buffer $buffer)
{
$data = $buffer->read($this->pendingFrameHeader['length']);
if ($this->pendingFrameHeader['masked']) {
$data = $this->unmaskData($data, $this->pendingFrameHeader['maskingKey']);
}
$frame = $this->frameFactory->create($this->pendingFrameHeader['fin'], $this->pendingFrameHeader['rsv'], $this->pendingFrameHeader['opcode'], $data);
unset($this->pendingFrameHeader);
return $frame;
}