/**
* Test if an item is already cached and if its cache is still valid
*
* This may check if a cache exists for the item and if it seems always valid ; validity
* may be tested for a static duration time (a `max_cache_time`) and could be checked
* comparing the creation time of the cache entry and the last modification time of the
* source if it is possible.
*
* @return bool
*/
public function isCached()
{
$cache_lifetime = Helper::getOption('cache_lifetime', 0);
if ($cache_lifetime > 0) {
return @file_exists($this->getCacheKey()) && filemtime($this->getCacheKey()) + $cache_lifetime > time();
} else {
return @file_exists($this->getCacheKey());
}
}
public function read()
{
$proxy = Helper::getOption('proxy');
if (is_null($proxy)) {
$protocol = substr($this->getFeedUrl(), 0, 5) == 'https' ? 'https' : 'http';
$proxy = Helper::getOption('proxy_' . $protocol);
}
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $this->getFeedUrl());
if (!is_null($proxy)) {
curl_setopt($ch, CURLOPT_PROXY, $proxy);
}
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
// curl_setopt($ch, CURLOPT_HEADER, 1);
$result = curl_exec($ch);
curl_close($ch);
if (!empty($result)) {
$this->_init($result)->parse();
}
}
public function forceRefresh($feed_url)
{
$cachable = Helper::getOption('use_cache', false);
$index = $this->getFeedItemIndex($feed_url);
if ($index) {
$this->feeds_registry[$i] = $cachable ? new FeedCachable($this->offsetGet($index), $index) : new Feed($this->offsetGet($index), $index);
}
}
