/**
* Chunk encode data as it is being written to the given output stream.
*
* @param StreamInterface $stream
* @param int $chunkSize
*
* @throws \InvalidArgumentException When the given chunk size is too small.
*/
public function __construct(StreamInterface $stream, $chunkSize = self::DEFAULT_CHUNK_SIZE)
{
parent::__construct($stream);
$this->chunkSize = (int) $chunkSize;
if ($this->chunkSize < 16) {
throw new \InvalidArgumentException(sprintf('Chunk size must not be less than 16, given %s (you can use flush() to send smaller chunks as needed)', $this->chunkSize));
}
}
/**
* Decompress data as it is being written.
*
* @param StreamInterface $stream
* @param int $encoding
*
* @throws \RuntimeException When decompression is not supported by the installed PHP version.
* @throws \InvalidArgumentException When the given compression encoding is invalid.
*/
public function __construct(StreamInterface $stream, $encoding = ZLIB_ENCODING_DEFLATE)
{
if (!function_exists('inflate_init')) {
throw new \RuntimeException('Stream decompression requires PHP 7');
}
parent::__construct($stream);
switch ($encoding) {
case self::RAW:
case self::DEFLATE:
case self::GZIP:
// OK
break;
default:
throw new \InvalidArgumentException(sprintf('Invalid decompression ecncoding specified: %s', $encoding));
}
$this->context = $this->invokeWithErrorHandler('inflate_init', $encoding);
}
/**
* Compress data as it is being written to the given output stream.
*
* @param StreamInterface $stream
* @param int $encoding
* @param int $level
* @param int $window
*
* @throws \RuntimeException When compression is not supported by the installed PHP version.
* @throws \InvalidArgumentException When compression encoding or level is invalid.
*/
public function __construct(StreamInterface $stream, $encoding = self::DEFLATE, $level = 1, $window = 32768)
{
if (!function_exists('deflate_init')) {
throw new \RuntimeException('Stream compression requires PHP 7');
}
parent::__construct($stream);
switch ($encoding) {
case self::RAW:
case self::DEFLATE:
case self::GZIP:
// OK
break;
default:
throw new \InvalidArgumentException(sprintf('Invalid compression ecncoding specified: %s', $encoding));
}
$level = (int) $level;
if ($level < 1 || $level > 9) {
throw new \InvalidArgumentException(sprintf('Compression level must be between 1 and 9, given %s', $level));
}
$this->context = $this->invokeWithErrorHandler('deflate_init', $encoding, ['level' => $level]);
$this->window = (int) $window;
}
