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<?php |
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namespace SilverStripe\ExternalLinks\Tasks; |
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use Psr\SimpleCache\CacheInterface; |
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use SilverStripe\Core\Config\Configurable; |
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use SilverStripe\Core\Injector\Injector; |
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/** |
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* Check links using curl |
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*/ |
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class CurlLinkChecker implements LinkChecker |
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{ |
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use Configurable; |
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/** |
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* If we want to follow redirects a 301 http code for example |
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* Set via YAML file |
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* |
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* @config |
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* @var boolean |
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*/ |
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private static $follow_location = false; |
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/** |
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* If we want to bypass the cache |
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* Set via YAML file |
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* |
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* @config |
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* @var boolean |
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*/ |
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private static $bypass_cache = false; |
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/** |
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* Return cache |
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* |
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* @return CacheInterface |
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*/ |
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protected function getCache() |
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{ |
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return Injector::inst()->get(CacheInterface::class . '.CurlLinkChecker'); |
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} |
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/** |
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* Determine the http status code for a given link |
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* |
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* @param string $href URL to check |
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* @return int HTTP status code, or null if not checkable (not a link) |
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*/ |
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public function checkLink($href) |
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{ |
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// Skip non-external links |
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if (!preg_match('/^https?[^:]*:\/\//', $href)) { |
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return null; |
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} |
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$cacheKey = md5($href); |
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if (!$this->config()->get('bypass_cache')) { |
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// Check if we have a cached result |
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$result = $this->getCache()->get($cacheKey, false); |
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if ($result !== false) { |
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return $result; |
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} |
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} |
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// No cached result so just request |
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$handle = curl_init($href); |
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curl_setopt($handle, CURLOPT_RETURNTRANSFER, true); |
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if ($this->config()->get('follow_location')) { |
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curl_setopt($handle, CURLOPT_FOLLOWLOCATION, true); |
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} |
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curl_setopt($handle, CURLOPT_CONNECTTIMEOUT, 5); |
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curl_setopt($handle, CURLOPT_TIMEOUT, 10); |
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curl_exec($handle); |
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$httpCode = curl_getinfo($handle, CURLINFO_HTTP_CODE); |
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curl_close($handle); |
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if (!$this->config()->get('bypass_cache')) { |
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// Cache result |
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$this->getCache()->set($cacheKey, $httpCode); |
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} |
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return $httpCode; |
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} |
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} |
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silverstripe /
silverstripe-externallinks
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