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<?php |
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declare(strict_types=1); |
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namespace Shlinkio\Shlink\Rest\Middleware\ShortCode; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Psr\Http\Server\MiddlewareInterface; |
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use Psr\Http\Server\RequestHandlerInterface; |
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use Zend\Diactoros\Response; |
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use Zend\Diactoros\Response\JsonResponse; |
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class CreateShortCodeContentNegotiationMiddleware implements MiddlewareInterface |
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{ |
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private const PLAIN_TEXT = 'text'; |
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private const JSON = 'json'; |
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/** |
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* Process an incoming server request and return a response, optionally delegating |
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* response creation to a handler. |
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* @throws \RuntimeException |
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* @throws \InvalidArgumentException |
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*/ |
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public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface |
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{ |
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/** @var JsonResponse $response */ |
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$response = $handler->handle($request); |
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$acceptedType = $request->hasHeader('Accept') |
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? $this->determineAcceptTypeFromHeader($request->getHeaderLine('Accept')) |
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: $this->determineAcceptTypeFromQuery($request->getQueryParams()); |
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// If JSON was requested, return the response from next handler as is |
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if ($acceptedType === self::JSON) { |
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return $response; |
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} |
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// If requested, return a plain text response containing the short URL only |
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$resp = (new Response())->withHeader('Content-Type', 'text/plain'); |
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$body = $resp->getBody(); |
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$body->write($response->getPayload()['shortUrl'] ?? ''); |
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$body->rewind(); |
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return $resp; |
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} |
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private function determineAcceptTypeFromQuery(array $query): string |
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{ |
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if (! isset($query['format'])) { |
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return self::JSON; |
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} |
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$format = \strtolower((string) $query['format']); |
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return $format === 'txt' ? self::PLAIN_TEXT : self::JSON; |
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} |
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private function determineAcceptTypeFromHeader(string $acceptValue): string |
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{ |
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$accepts = \explode(',', $acceptValue); |
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$accept = \strtolower(\array_shift($accepts)); |
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return \strpos($accept, 'text/plain') !== false ? self::PLAIN_TEXT : self::JSON; |
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} |
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} |
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shlinkio /
shlink
