Joomla! Programmierung/Framework/JHtmlBehavior/keepalive

Beschreibung

JHTMLBehavior/keepalive bindet eine Javascriptfunktion ein, um die Session am Leben zu erhalten. Nützlich z.B. bei längerem editieren von Artikeln.

Syntax

static keepalive()

• @return void
• @since

Beispiele

Session aktiv halten

JHtml::_('behavior.keepalive');

Quellcode

 libraries

•  joomla
  •  html
    •  html
      •  behavior.php

public static function keepalive()
{
   // Only load once
   if (isset(self::$loaded[__METHOD__]))
   {
      return;
   }
 
   // Include MooTools framework
   self::framework();
 
   $config = JFactory::getConfig();
   $lifetime = ($config->get('lifetime') * 60000);
   $refreshTime = ($lifetime <= 60000) ? 30000 : $lifetime - 60000;
   // Refresh time is 1 minute less than the liftime assined in the configuration.php file.
 
   // the longest refresh period is one hour to prevent integer overflow.
   if ($refreshTime > 3600000 || $refreshTime <= 0)
   {
      $refreshTime = 3600000;
   }
 
   $document = JFactory::getDocument();
   $script = '';
   $script .= 'function keepAlive() {';
   $script .= '   var myAjax = new Request({method: "get", url: "index.php"}).send();';
   $script .= '}';
   $script .= ' window.addEvent("domready", function()';
   $script .= '{ keepAlive.periodical(' . $refreshTime . '); }';
   $script .= ');';
 
   $document->addScriptDeclaration($script);
   self::$loaded[__METHOD__] = true;
 
   return;
}

Siehe auch

• JHtmlBehavior->keepalive auf api.joomla.org
• JHtml::_