params= new JRegistry(); $this->params->loadString($plugin->params, 'JSON'); $this->_cacheEnabled = $this->params->get('cache_enabled'); if ($this->_cacheEnabled === null) $this->_cacheEnabled == 1; $this->_autoflush = $this->params->get('autoFlush'); if ($this->_autoflush === null) $this->_autoflush = 1; $this->_autoflush3rdParty = $this->params->get('autoFlush-ThirdParty'); if ($this->_autoflush3rdParty === null) $this->_autoflush3rdParty = 1; $this->_autoflushClientSide = $this->params->get('autoFlush-ClientSide'); if ($this->_autoflushClientSide === null) $this->_autoflushClientSide = 0; } /** * Heartbeat cache checking function. Will also monitor $_GET for the jSGCache parameter * (pressing the purge cache button in admin) * * * @access public * @return null */ public function onAfterInitialise() { if (!$this->_cacheEnabled || $this->_isBlacklisted($this->_applicationPath)) { JResponse::setHeader('X-Cache-Enabled','False',true); return; } if ($this->_cacheEnabled) { JResponse::setHeader('X-Cache-Enabled','True',true); } //Init the application url $this->_applicationPath = str_replace(array('administrator/index.php','index.php'),'',str_replace($_SERVER['DOCUMENT_ROOT'],'',$_SERVER['SCRIPT_FILENAME'])); //Check for any admin action and proceed to flushMonitor and 3rd party plugins if ( isset($_POST['task']) || isset($_GET['task']) || isset($_GET['cart_virtuemart_product_id'])) { $this->_flushMonitor(); if ($this->_autoflush3rdParty) $this->_monitorThirdPartyPlugins(); } //Check if we have a logged in user and enable cache bypass cookie 'task' => string 'user.login' $user = JFactory::getUser(); if (!$user->guest || (isset($_POST['task']) && preg_match('/login/i', $_POST['task']))) { $_POST[JSession::getFormToken()] = 1; //Force the correct token, since the login box on the page is cached with the 1st visitors' token //Enable the cache bypass for logged users by setting a cache bypass cookie setcookie('jSGCacheBypass',1,time() + 6000,'/'); } if ($user->guest || (isset($_POST['task']) && $_POST['task'] == 'user.logout')) { //Remove the bypass cookie if not a logged user if (isset($_COOKIE['jSGCacheBypass'])) setcookie('jSGCacheBypass',0, time() - 3600,'/'); } // Handle purge button press when get has jSGCache=purge, but only in admin with a logged user if(isset($_GET['jSGCache']) && $_GET['jSGCache'] == 'purge' && JFactory::getApplication()->isAdmin() && !$user->guest ) $this->_purgeCache(true); } /** * Admin panel icon display * * @access public * @param string $context * @return array */ public function onGetIcons( $context ) { return array(array( 'link'=>'?jSGCache=purge', 'image'=>'header/icon-48-purge.png', 'text'=>JText::_('Purge jSGCache'), 'id'=>'jSGCache' )); } /** * Calls the cache server to purge the cache * * @access public * @param string|bool $message Message to be displayed if purge is successful. If this param is false no output would be done * @return null */ private function _purgeCache( $message = true ) { $purgeRequest = $this->_applicationPath . '(.*)'; // Check if caching server is varnish or nginx. $sgcache_ip = '/etc/sgcache_ip'; $hostname = $_SERVER['SERVER_ADDR']; $purge_method = "PURGE"; if (file_exists($sgcache_ip)) { $hostname = trim( file_get_contents( $sgcache_ip, true ) ); $purge_method = "BAN"; } $cacheServerSocket = fsockopen($hostname, 80, $errno, $errstr, 2); if(!$cacheServerSocket) { JError::raise(E_ERROR,500,JText::_('Connection to cache server failed!')); JError::raise(E_ERROR,500,JText::_($errstr ($errno))); return; } $request = "$purge_method {$purgeRequest} HTTP/1.0\r\nHost: {$_SERVER['SERVER_NAME']}\r\nConnection: Close\r\n\r\n"; if (preg_match('/^www\./',$_SERVER['SERVER_NAME'])) { $domain_no_www = preg_replace('/^www\./', '', $_SERVER['SERVER_NAME']); $request2 = "$purge_method {$purgeRequest} HTTP/1.0\r\nHost: {$domain_no_www}\r\nConnection: Close\r\n\r\n"; } else $request2 = "$purge_method {$purgeRequest} HTTP/1.0\r\nHost: www.{$_SERVER['SERVER_NAME']}\r\nConnection: Close\r\n\r\n"; fwrite($cacheServerSocket, $request); $response = fgets($cacheServerSocket); fclose($cacheServerSocket); $cacheServerSocket = fsockopen($hostname, 80, $errno, $errstr, 2); fwrite($cacheServerSocket, $request2); fclose($cacheServerSocket); if($message !== false) { if(preg_match('/200/',$response)) { if ($message === true) JFactory::getApplication()->enqueueMessage(JText::_('SG Cache Successfully Purged!')); else JFactory::getApplication()->enqueueMessage(JText::_( $message )); } else { JError::raise(E_NOTICE,501, JText::_('SG Cache: Purge was not successful!')); JError::raise(E_NOTICE,501, jText::_('Error: ' . $response)); } } } /** * Check if url is in caching blacklist * * @param string $applicationPath * * @return bool */ private function _isBlacklisted($applicationPath) { $blacklistArray = explode("\n",$this->params->get('blacklist')); $blacklistRegexArray = array(); $indexIsBlacklisted = false; foreach($blacklistArray as $key=>$row) { $row = trim($row); if ($row != '/' && $quoted = preg_quote($row,'/')) $blacklistRegexArray[$key] = $quoted; if ($row == '/') $indexIsBlacklisted = true; } if ($indexIsBlacklisted && $_SERVER['REQUEST_URI'] == $applicationPath) return true; if (empty($blacklistRegexArray)) return false; $blacklistRegex = '/('.implode('|',$blacklistRegexArray) . ')/i'; return preg_match($blacklistRegex, $_SERVER['REQUEST_URI']); } /** * 3rd party plugin monitor * * @access private * @return null */ private function _monitorThirdPartyPlugins() { // Kunena & K2 if ($this->params->get('autoFlush-ThirdParty') == 1 && isset($_POST['option']) && ($_POST['option']=='com_k2' || $_POST['option' ]== 'com_kunena')) { $this->_purgeCache(false); } // VirtueMart if ( (isset($_POST['option']) && $_POST['option'] == 'com_virtuemart') || ( isset($_GET['option']) && $_GET['option'] == 'com_virtuemart' ) || isset($_GET['cart_virtuemart_product_id']) ) { if($this->params->get('autoFlush-ThirdParty') == 1) $this->_purgeCache(false); } } /** * Action monitor * * @access private * @return null */ private function _flushMonitor() { $user = JFactory::getUser(); if ((!JFactory::getApplication()->isAdmin() && !$this->_autoflushClientSide) || $user->guest) return; $autoflush = $this->params->get('autoFlush'); if ($autoflush === null) $autoflush = 1; if (isset($_POST['task']) && $_POST['task'] && !in_array($_POST['task'],self::$_ignoreTasks) && $autoflush == 1) $this->_purgeCache(false); } } Zeszutek Consulting Services
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JWZ 

Welcome to the home page of  Zeszutek Consulting and the personal Web page of Jim Zeszutek

Jim Zeszutek is a web professional specializing in meeting the business needs of clients who want to create or extend their Internet presence.

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