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<?php |
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namespace Koded\Framework\Middleware; |
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use Psr\Http\Message\{ResponseInterface, ServerRequestInterface}; |
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use Psr\Http\Server\{MiddlewareInterface, RequestHandlerInterface}; |
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use function gzencode; |
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use function Koded\Http\create_stream; |
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use function str_contains; |
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class GzipMiddleware implements MiddlewareInterface |
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{ |
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private const ACCEPT_ENCODING = 'Accept-Encoding'; |
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private const CONTENT_ENCODING = 'Content-Encoding'; |
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public function process( |
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ServerRequestInterface $request, |
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RequestHandlerInterface $handler): ResponseInterface |
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{ |
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$response = $handler->handle($request); |
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if ($response->hasHeader(self::CONTENT_ENCODING)) { |
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// Probably already encoded; move on |
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return $response; |
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} |
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if (empty($response->getBody()->getSize())) { |
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return $response; |
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} |
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if (false === $this->isAcceptable($request->getHeaderLine(self::ACCEPT_ENCODING))) { |
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return $response; |
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} |
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$response->getBody()->rewind(); |
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return $response |
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->withHeader(self::CONTENT_ENCODING, 'gzip') |
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->withAddedHeader('Vary', self::ACCEPT_ENCODING) |
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->withBody(create_stream( |
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gzencode($response->getBody()->getContents(), 7), |
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(string)$response->getBody()->getMetadata('mode') |
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)); |
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} |
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private function isAcceptable(string $encoding): bool |
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{ |
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return match (true) { |
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// NOTE: most common first |
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empty($encoding) => false, |
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str_contains($encoding, 'gzip'), |
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str_contains($encoding, '*') => true, |
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default => false |
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}; |
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} |
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} |
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kodeart /
koded
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