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<?php |
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namespace Psr7Middlewares\Middleware; |
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use Psr7Middlewares\Middleware; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Psr\Http\Message\ResponseInterface; |
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use RuntimeException; |
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/** |
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* Middleware to block request from blacklist referrer. |
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*/ |
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class BlockSpam |
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{ |
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private $spammers; |
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private $list; |
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public function __construct($spammers = null) |
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{ |
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if ($spammers === null) { |
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$spammers = __DIR__.'/../../../../vendor/piwik/referrer-spam-blacklist/spammers.txt'; |
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} |
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$this->spammers = $spammers; |
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} |
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/** |
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* Execute the middleware. |
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* |
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* @param ServerRequestInterface $request |
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* @param ResponseInterface $response |
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* @param callable $next |
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* |
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* @return ResponseInterface |
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*/ |
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public function __invoke(ServerRequestInterface $request, ResponseInterface $response, callable $next) |
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{ |
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if ($this->list === null) { |
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if (!is_file($this->spammers)) { |
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throw new RuntimeException(sprintf('The spammers file "%s" doest not exists', $this->spammers)); |
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} |
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$this->list = file($this->spammers, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES); |
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} |
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$referer = parse_url($request->getHeaderLine('Referer'), PHP_URL_HOST); |
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$referer = preg_replace('/^(www\.)/i', '', $referer); |
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if (in_array($referer, $this->list, true)) { |
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return $response->withStatus(403); |
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} |
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return $next($request, $response); |
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} |
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} |
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oscarotero /
psr7-middlewares
