silverstripe-externallinks/code/tasks/CurlLinkChecker.php
2014-08-13 09:17:02 +12:00

50 lines
1.1 KiB
PHP

<?php
/**
* Check links using curl
*/
class CurlLinkChecker implements LinkChecker {
/**
* Return cache
*
* @return Zend_Cache_Frontend
*/
protected function getCache() {
return SS_Cache::factory(
__CLASS__,
'Output',
array('automatic_serialization' => true)
);
}
/**
* Determine the http status code for a given link
*
* @param string $href URL to check
* @return int HTTP status code, or null if not checkable (not a link)
*/
public function checkLink($href) {
// Skip non-external links
if(!preg_match('/^https?[^:]*:\/\//', $href)) return null;
// Check if we have a cached result
$cacheKey = md5($href);
$result = $this->getCache()->load($cacheKey);
if($result !== false) return $result;
// No cached result so just request
$handle = curl_init($href);
curl_setopt($handle, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($handle, CURLOPT_CONNECTTIMEOUT, 5);
curl_setopt($handle, CURLOPT_TIMEOUT, 10);
curl_exec($handle);
$httpCode = curl_getinfo($handle, CURLINFO_HTTP_CODE);
curl_close($handle);
// Cache result
$this->getCache()->save($httpCode, $cacheKey);
return $httpCode;
}
}