vendor/php-http/client-common/src/Plugin/DecoderPlugin.php line 69
<?phpdeclare(strict_types=1);namespace Http\Client\Common\Plugin;use Http\Client\Common\Plugin;use Http\Message\Encoding;use Http\Promise\Promise;use Psr\Http\Message\RequestInterface;use Psr\Http\Message\ResponseInterface;use Psr\Http\Message\StreamInterface;use Symfony\Component\OptionsResolver\OptionsResolver;/*** Allow to decode response body with a chunk, deflate, compress or gzip encoding.** If zlib is not installed, only chunked encoding can be handled.** If Content-Encoding is not disabled, the plugin will add an Accept-Encoding header for the encoding methods it supports.** @author Joel Wurtz <joel.wurtz@gmail.com>*/final class DecoderPlugin implements Plugin{/*** @var bool Whether this plugin decode stream with value in the Content-Encoding header (default to true).** If set to false only the Transfer-Encoding header will be used*/private $useContentEncoding;/*** @param array{'use_content_encoding'?: bool} $config** Configuration options:* - use_content_encoding: Whether this plugin should look at the Content-Encoding header first or only at the Transfer-Encoding (defaults to true)*/public function __construct(array $config = []){$resolver = new OptionsResolver();$resolver->setDefaults(['use_content_encoding' => true,]);$resolver->setAllowedTypes('use_content_encoding', 'bool');$options = $resolver->resolve($config);$this->useContentEncoding = $options['use_content_encoding'];}public function handleRequest(RequestInterface $request, callable $next, callable $first): Promise{$encodings = extension_loaded('zlib') ? ['gzip', 'deflate'] : ['identity'];if ($this->useContentEncoding) {$request = $request->withHeader('Accept-Encoding', $encodings);}$encodings[] = 'chunked';$request = $request->withHeader('TE', $encodings);return $next($request)->then(function (ResponseInterface $response) {return $this->decodeResponse($response);});}/*** Decode a response body given its Transfer-Encoding or Content-Encoding value.*/private function decodeResponse(ResponseInterface $response): ResponseInterface{$response = $this->decodeOnEncodingHeader('Transfer-Encoding', $response);if ($this->useContentEncoding) {$response = $this->decodeOnEncodingHeader('Content-Encoding', $response);}return $response;}/*** Decode a response on a specific header (content encoding or transfer encoding mainly).*/private function decodeOnEncodingHeader(string $headerName, ResponseInterface $response): ResponseInterface{if ($response->hasHeader($headerName)) {$encodings = $response->getHeader($headerName);$newEncodings = [];while ($encoding = array_pop($encodings)) {$stream = $this->decorateStream($encoding, $response->getBody());if (false === $stream) {array_unshift($newEncodings, $encoding);continue;}$response = $response->withBody($stream);}if (\count($newEncodings) > 0) {$response = $response->withHeader($headerName, $newEncodings);} else {$response = $response->withoutHeader($headerName);}}return $response;}/*** Decorate a stream given an encoding.** @return StreamInterface|false A new stream interface or false if encoding is not supported*/private function decorateStream(string $encoding, StreamInterface $stream){if ('chunked' === strtolower($encoding)) {return new Encoding\DechunkStream($stream);}if ('deflate' === strtolower($encoding)) {return new Encoding\DecompressStream($stream);}if ('gzip' === strtolower($encoding)) {return new Encoding\GzipDecodeStream($stream);}return false;}}