public function stream(InputStreamInterface $in) : \Generator
{
if ($this->disconnected) {
throw new WebSocketException('Cannot send message to disconnected web socket');
}
$eof = $in->eof();
$i = 0;
while (!$eof) {
$chunk = (yield from $in->read(8188));
$eof = $in->eof();
yield from $this->sendFrame(new Frame($i++ === 0 ? Frame::BINARY : Frame::CONTINUATION, $chunk, $eof));
}
}
/**
* Read next inbound frame from the socket.
*
* @return Frame or false when connection has been terminated.
*/
protected function readNextFrane() : \Generator
{
try {
list($a, $b) = array_map('ord', str_split(yield from Stream::readBuffer($this->stream, 2, true), 1));
$finished = $a & Frame::FINISHED ? true : false;
$opcode = (int) ($a & Frame::OPCODE);
$masked = $b & Frame::MASKED ? true : false;
$len = (int) ($b & Frame::LENGTH);
if ($this->masked && !$masked) {
throw new WebSocketException('Client messages must be masked');
}
// Parse extended length fields:
if ($len === 0x7e) {
$len = unpack('n', yield from Stream::readBuffer($this->stream, 2, true))[1];
} elseif ($len === 0x7f) {
$lp = unpack('N2', yield from Stream::readBuffer($this->stream, 8, true));
// 32 bit int check:
if (PHP_INT_MAX === 0x7fffffff) {
if ($lp[1] !== 0 || $lp[2] < 0) {
throw new WebSocketException('Max payload size exceeded');
}
$len = $lp[2];
} else {
$len = $lp[1] << 32 | $lp[2];
if ($len < 0) {
throw new WebSocketException('Cannot use most significant bit in 64 bit length field');
}
}
}
if ($len < 0) {
throw new WebSocketException('Payload length must not be negative');
}
// Read and unmask data in chunks:
if ($this->masked) {
$key = str_split(yield from Stream::readBuffer($this->stream, 4, true), 1);
}
$data = '';
$read = 0;
$i = 0;
while ($read < $len && !$this->stream->eof()) {
$data .= (yield from $this->stream->read($len - $read));
if ($this->masked) {
for ($read = \strlen($data); $i < $read; $i++) {
$data[$i] = $data[$i] ^ $key[$i % 4];
}
} else {
$read = \strlen($data);
}
}
if (\strlen($data) !== $len) {
throw new WebSocketException(sprintf('Expected %u bytes, received %u bytes', $len, \strlen($data)));
}
return new Frame($opcode, $data, $finished);
} catch (StreamException $e) {
if ($this->stream->eof()) {
return false;
}
throw $e;
} catch (WebSocketException $e) {
if ($this->stream->eof()) {
return false;
}
throw $e;
}
}
protected function broadcastBinary(InputStreamInterface $in, Client $sender = NULL, bool $excludeSender = true) : \Generator
{
// Copy clients array to avoid sending partial messages to clients that connect during broadcast.
$clients = $this->clients;
$eof = $in->eof();
$i = 0;
while (!$eof) {
$chunk = (yield from $in->read(8188));
$eof = $in->eof();
yield from $this->broadcastFrame(new Frame($i++ === 0 ? Frame::BINARY : Frame::CONTINUATION, $chunk, $eof), $clients, $sender, $excludeSender);
}
}
