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efrain |
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<?php
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declare(strict_types=1);
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namespace GuzzleHttp\Psr7;
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use Psr\Http\Message\StreamInterface;
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/**
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* Uses PHP's zlib.inflate filter to inflate zlib (HTTP deflate, RFC1950) or gzipped (RFC1952) content.
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*
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* This stream decorator converts the provided stream to a PHP stream resource,
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* then appends the zlib.inflate filter. The stream is then converted back
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* to a Guzzle stream resource to be used as a Guzzle stream.
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*
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* @link http://tools.ietf.org/html/rfc1950
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* @link http://tools.ietf.org/html/rfc1952
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* @link http://php.net/manual/en/filters.compression.php
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*/
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final class InflateStream implements StreamInterface
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{
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use StreamDecoratorTrait;
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/** @var StreamInterface */
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private $stream;
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public function __construct(StreamInterface $stream)
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{
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$resource = StreamWrapper::getResource($stream);
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// Specify window=15+32, so zlib will use header detection to both gzip (with header) and zlib data
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// See http://www.zlib.net/manual.html#Advanced definition of inflateInit2
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// "Add 32 to windowBits to enable zlib and gzip decoding with automatic header detection"
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// Default window size is 15.
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stream_filter_append($resource, 'zlib.inflate', STREAM_FILTER_READ, ['window' => 15 + 32]);
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$this->stream = $stream->isSeekable() ? new Stream($resource) : new NoSeekStream(new Stream($resource));
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}
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}
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