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<?php |
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|
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declare (strict_types=1); |
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namespace WCPOS\Vendor\GuzzleHttp\Psr7; |
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|
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use WCPOS\Vendor\GuzzleHttp\Psr7\Exception\TimeoutException; |
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use WCPOS\Vendor\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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* @see https://datatracker.ietf.org/doc/html/rfc1950 |
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* @see https://datatracker.ietf.org/doc/html/rfc1952 |
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* @see https://www.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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use NonSerializableStreamTrait; |
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private StreamInterface $stream; |
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private ?StreamInterface $source; |
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public function __construct(StreamInterface $stream) |
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{ |
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$this->source = $stream; |
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$resource = StreamWrapper::getResource($stream); |
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// Specify window=15+32, so zlib will use header detection to both gzip (with header) and zlib data |
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// See https://www.zlib.net/manual.html#Advanced definition of inflateInit2 |
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// "Add 32 to windowBits to enable zlib and gzip decoding with automatic header detection" |
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// Default window size is 15. |
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\stream_filter_append($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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public function read(int $length) : string |
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{ |
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if ($length <= 0 || $this->source === null) { |
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return $this->stream->read($length); |
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} |
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try { |
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$data = $this->stream->read($length); |
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} catch (TimeoutException $e) { |
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throw $e; |
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} catch (\RuntimeException $e) { |
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if (StreamTimeout::isReadTimedOut($this->source)) { |
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throw new TimeoutException('Unable to read from stream: timed out', 0, $e); |
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} |
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throw $e; |
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} |
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if ($data === '' && StreamTimeout::isReadTimedOut($this->source)) { |
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throw new TimeoutException('Unable to read from stream: timed out'); |
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} |
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return $data; |
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} |
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public function close() : void |
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{ |
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$source = $this->source; |
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$this->source = null; |
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$exception = null; |
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try { |
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$this->stream->close(); |
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} catch (\Throwable $e) { |
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$exception = $e; |
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} |
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if ($source !== null) { |
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try { |
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$source->close(); |
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} catch (\Throwable $e) { |
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if ($exception === null) { |
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$exception = $e; |
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} |
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} |
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} |
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if ($exception !== null) { |
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throw $exception; |
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} |
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} |
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public function detach() |
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{ |
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$this->source = null; |
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return $this->stream->detach(); |
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} |
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} |
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