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<?php |
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namespace Psr7Middlewares\Middleware; |
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use Psr7Middlewares\Utils; |
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use Psr\Http\Message\RequestInterface; |
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use Psr\Http\Message\ResponseInterface; |
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/** |
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* Middleware to redirect to force www subdomain or remove it. |
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*/ |
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class Www |
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{ |
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use Utils\RedirectTrait; |
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/** |
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* @var bool Add or remove www |
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*/ |
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private $addWww; |
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/** |
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* Configure whether the www subdomain should be added or removed. |
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* |
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* @param bool $addWww |
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*/ |
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public function __construct($addWww = false) |
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{ |
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$this->addWww = (boolean) $addWww; |
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} |
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/** |
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* Execute the middleware. |
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* |
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* @param RequestInterface $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(RequestInterface $request, ResponseInterface $response, callable $next) |
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{ |
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$uri = $request->getUri(); |
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$host = $uri->getHost(); |
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if ($this->addWww) { |
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if ($this->canAddWww($host)) { |
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$host = "www.{$host}"; |
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} |
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} elseif (strpos($host, 'www.') === 0) { |
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$host = substr($host, 4); |
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} |
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//redirect |
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if (is_int($this->redirectStatus) && ($uri->getHost() !== $host)) { |
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return self::getRedirectResponse($this->redirectStatus, $uri->withHost($host), $response); |
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} |
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return $next($request->withUri($uri->withHost($host)), $response); |
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} |
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/** |
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* Check whether the domain can add a www. subdomain. |
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* Returns false if: |
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* - the host is "localhost" |
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* - the host is a ip |
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* - the host has already a subdomain, for example "subdomain.example.com". |
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* |
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* @param string $host |
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* |
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* @return bool |
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*/ |
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private function canAddWww($host) |
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{ |
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if (empty($host) || filter_var($host, FILTER_VALIDATE_IP)) { |
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return false; |
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} |
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$host = array_reverse(explode('.', $host)); |
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switch (count($host)) { |
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case 1: //localhost |
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return false; |
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case 2: //example.com |
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return true; |
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case 3: |
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//example.co.uk |
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if ($host[1] === 'co') { |
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return true; |
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} |
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default: |
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return false; |
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} |
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} |
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} |
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oscarotero /
psr7-middlewares
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