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[core] Returning 304 http code when returning cached data (#793)

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Eugene Molotov 2018-08-26 00:00:38 +05:00 • committed by Teromene
parent 059656c370
commit 422c125d8e
3 changed files with 33 additions and 0 deletions
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23
lib/BridgeAbstract.php
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@ -292,4 +292,27 @@ abstract class BridgeAbstract implements BridgeInterface {
public function getCacheTimeout(){
return isset($this->cacheTimeout) ? $this->cacheTimeout : static::CACHE_TIMEOUT;
}
public function getCacheTime(){
return !is_null($this->cache) ? $this->cache->getTime() : false;
}
public function dieIfNotModified(){
if ((defined('DEBUG') && DEBUG === true)) return; // disabled in debug mode
$if_modified_since = isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) ? $_SERVER['HTTP_IF_MODIFIED_SINCE'] : false;
if (!$if_modified_since) return; // If-Modified-Since value is required
$last_modified = $this->getCacheTime();
if (!$last_modified) return; // did not detect cache time
if (time() - $this->getCacheTimeout() > $last_modified) return; // cache timeout
$last_modified = (gmdate('D, d M Y H:i:s ', $last_modified) . 'GMT');
if ($if_modified_since == $last_modified) {
header('HTTP/1.1 304 Not Modified');
die();
}
}
}