__construct()
__construct(\Psr\Http\Message\StreamInterface $stream) : mixed
Parameters
| \Psr\Http\Message\StreamInterface | $stream |
Uses PHP's zlib.inflate filter to inflate deflate or gzipped content.
This stream decorator skips the first 10 bytes of the given stream to remove the gzip header, converts the provided stream to a PHP stream resource, then appends the zlib.inflate filter. The stream is then converted back to a Guzzle stream resource to be used as a Guzzle stream.
__get(string $name) : \Psr\Http\Message\StreamInterface
Magic method used to create a new stream if streams are not added in the constructor of a decorator (e.g., LazyOpenStream).
| string | $name | Name of the property (allows "stream" only). |
<?php
namespace GuzzleHttp\Psr7;
use Psr\Http\Message\StreamInterface;
/**
* Uses PHP's zlib.inflate filter to inflate deflate or gzipped content.
*
* This stream decorator skips the first 10 bytes of the given stream to remove
* the gzip header, converts the provided stream to a PHP stream resource,
* then appends the zlib.inflate filter. The stream is then converted back
* to a Guzzle stream resource to be used as a Guzzle stream.
*
* @link http://tools.ietf.org/html/rfc1952
* @link http://php.net/manual/en/filters.compression.php
*
* @final
*/
class InflateStream implements StreamInterface
{
use StreamDecoratorTrait;
public function __construct(StreamInterface $stream)
{
// read the first 10 bytes, ie. gzip header
$header = $stream->read(10);
$filenameHeaderLength = $this->getLengthOfPossibleFilenameHeader($stream, $header);
// Skip the header, that is 10 + length of filename + 1 (nil) bytes
$stream = new LimitStream($stream, -1, 10 + $filenameHeaderLength);
$resource = StreamWrapper::getResource($stream);
stream_filter_append($resource, 'zlib.inflate', STREAM_FILTER_READ);
$this->stream = $stream->isSeekable() ? new Stream($resource) : new NoSeekStream(new Stream($resource));
}
/**
* @param StreamInterface $stream
* @param $header
*
* @return int
*/
private function getLengthOfPossibleFilenameHeader(StreamInterface $stream, $header)
{
$filename_header_length = 0;
if (substr(bin2hex($header), 6, 2) === '08') {
// we have a filename, read until nil
$filename_header_length = 1;
while ($stream->read(1) !== chr(0)) {
$filename_header_length++;
}
}
return $filename_header_length;
}
}