/**
* {@inheritdoc}
*/
public function sendBinary(ReadableStream $stream, int $priority = 0) : Awaitable
{
return $this->writer->execute(function () use($stream) {
$type = Frame::BINARY;
$reserved = Frame::RESERVED1;
$context = $this->deflate->getCompressionContext();
$len = 0;
try {
$chunk = (yield $stream->readBuffer(4092));
while (null !== ($next = (yield $stream->readBuffer(4092)))) {
$chunk = \deflate_add($context, $chunk, \ZLIB_SYNC_FLUSH);
$len += (yield $this->writeFrame(new Frame($type, $chunk, false, $reserved)));
$chunk = $next;
$type = Frame::CONTINUATION;
$reserved = 0;
}
if ($chunk !== null) {
$chunk = \substr(\deflate_add($context, $chunk, $this->deflate->getCompressionFlushMode()), 0, -4);
$len += (yield $this->writeFrame(new Frame($type, $chunk, true, $reserved)));
}
return $len;
} finally {
$stream->close();
}
}, $priority);
}
/**
* Negotiate permessage-deflate WebSocket extensio if supported by the clientn.
*
* @param HttpRequest $request
* @return PerMessageDeflate Or null when not supported by client / server or invalid window sizes are specified.
*/
protected function negotiatePerMessageDeflate(HttpRequest $request)
{
static $zlib;
$extension = null;
if ($zlib ?? ($zlib = \function_exists('inflate_init'))) {
foreach ($request->getHeaderTokens('Sec-WebSocket-Extensions') as $ext) {
if (\strtolower($ext->getValue()) === 'permessage-deflate') {
$extension = $ext;
break;
}
}
}
if ($extension === null) {
return;
}
try {
return PerMessageDeflate::fromHeaderToken($extension);
} catch (\OutOfRangeException $e) {
return;
}
}
/**
* Enable permessage-deflate WebSocket protocol extension.
*
* @param PerMessageDeflate $deflate
*/
public function enablePerMessageDeflate(PerMessageDeflate $deflate)
{
$this->deflate = $deflate;
$this->writer = new CompressedMessageWriter($this->socket, $this->client, $deflate);
if ($this->logger) {
$this->logger->debug('Enabled extension: {extension}', ['extension' => $deflate->getExtensionHeader()]);
}
}
