/**
* {@inheritdoc}
*
* @throws \Icicle\Http\Exception\MessageException If an invalid chunk length is found.
*/
protected function send(string $data, float $timeout = 0, bool $end = false) : \Generator
{
$this->buffer->push($data);
$data = '';
while (!$this->buffer->isEmpty()) {
if (0 === $this->length) {
// Read chunk length.
if (false === ($position = $this->buffer->search("\r\n"))) {
return yield from parent::send($data, $timeout, $end);
}
$length = rtrim($this->buffer->remove($position + 2), "\r\n");
if ($position = strpos($length, ';')) {
$length = substr($length, 0, $position);
}
if (!preg_match('/^[a-f0-9]+$/i', $length)) {
yield from parent::send('', $timeout, true);
throw new MessageException(Response::BAD_REQUEST, 'Invalid chunk length.');
}
$this->length = hexdec($length) + 2;
if (2 === $this->length) {
// Termination chunk.
$end = true;
}
}
if (2 < $this->length) {
// Read chunk.
$buffer = $this->buffer->remove($this->length - 2);
$this->length -= strlen($buffer);
$data .= $buffer;
}
if (2 >= $this->length) {
// Remove \r\n after chunk.
$this->length -= strlen($this->buffer->remove($this->length));
}
}
return yield from parent::send($data, $timeout, $end);
}
