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<?php |
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declare(strict_types=1); |
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namespace loophp\UnalteredPsrHttpMessageBridgeBundle\Factory; |
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use Generator; |
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use Symfony\Bridge\PsrHttpMessage\HttpMessageFactoryInterface; |
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use Symfony\Component\HttpFoundation\Request; |
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use Symfony\Component\HttpFoundation\Response; |
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final class UnalteredPsrHttpFactory implements HttpMessageFactoryInterface |
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{ |
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/** |
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* @var \Symfony\Bridge\PsrHttpMessage\HttpMessageFactoryInterface |
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*/ |
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private $httpMessageFactory; |
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public function __construct(HttpMessageFactoryInterface $httpMessageFactory) |
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{ |
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$this->httpMessageFactory = $httpMessageFactory; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function createRequest(Request $symfonyRequest) |
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{ |
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// Call the original object to avoid duplicating code. |
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$request = $this->httpMessageFactory->createRequest($symfonyRequest); |
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// If a query string does not exist, return the original object. |
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if ('' === $unalteredQueryString = $symfonyRequest->server->get('QUERY_STRING')) { |
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return $request; |
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} |
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// This is where all is happening. |
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// We do not rely on $symfonyRequest->query->all() because it relies |
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// on parse_str() which is altering the query string parameters. |
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// We rely on $symfonyRequest->server->get('QUERY_STRING') so we are |
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// sure that the query string hasn't been altered. |
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// Create a new request with the URI and Params updated. |
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return $request |
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->withQueryParams( |
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iterator_to_array($this->parseStr($unalteredQueryString)) |
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) |
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->withUri( |
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$request |
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->getUri() |
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->withQuery($unalteredQueryString) |
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); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function createResponse(Response $symfonyResponse) |
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{ |
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return $this->httpMessageFactory->createResponse($symfonyResponse); |
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} |
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/** |
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* Custom parse_str() function that doesn't alter the parameters key value. |
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* |
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* @see: https://github.com/ecphp/cas-lib/issues/5. |
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* |
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* @param string $queryString |
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* |
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* @return Generator<string, string> |
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*/ |
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private function parseStr(string $queryString): Generator |
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{ |
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$regex = '/^(?<key>[^&=]+?)(?:\[[^&=]*\])?=(?<value>[^&=]+)$/'; |
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$parameters = explode('&', $queryString); |
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foreach (['urldecode', 'bin2hex'] as $callback) { |
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$parameters = array_map( |
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static function (string $keyValue) use ($regex, $callback): string { |
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return (string) preg_replace_callback( |
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$regex, |
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static function (array $match) use ($callback): string { |
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return str_replace($match['key'], $callback($match['key']), $match[0]); |
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}, |
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$keyValue |
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); |
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}, |
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$parameters |
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); |
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} |
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parse_str( |
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implode('&', $parameters), |
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$parameters |
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); |
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foreach ($parameters as $key => $value) { |
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yield (string) hex2bin($key) => $value; |
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} |
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return yield from []; |
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} |
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} |
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