Redirect to Previous page after FB Login

Question

I'm using below function for redirection after FB login, But it's redirecting to Customers Account Dashboard, Instead of Account Dashboard I'd like to redirect to Home Page or the Previous Page.

 protected function _loginPostRedirect()
 {
    $session = Mage::getSingleton('customer/session');

    if (!$session->getBeforeAuthUrl() || $session->getBeforeAuthUrl() == Mage::getBaseUrl()) {
        // Set default URL to redirect customer to
        $session->setBeforeAuthUrl(Mage::helper('customer')->getDashboardUrl());

    } else if ($session->getBeforeAuthUrl() == Mage::helper('customer')->getLogoutUrl()) {
        $session->setBeforeAuthUrl(Mage::helper('customer')->getDashboardUrl());
    } else {
        if (!$session->getAfterAuthUrl()) {
            $session->setAfterAuthUrl($session->getBeforeAuthUrl());
        }
        if ($session->isLoggedIn()) {
            $session->setBeforeAuthUrl($session->getAfterAuthUrl(true));
        }
    }
    $this->_redirectUrl($session->getBeforeAuthUrl(true));
}

I've tried

$session->setBeforeAuthUrl(Mage::helper('customer')->getHomeUrl());

$session->setBeforeAuthUrl(Mage::helper('customer')->getCurrentUrl());

But it's not working

Answer 1

Try Using this to redirect to home page

$homeUrl = Mage::getBaseUrl();
$this->_redirectUrl($homeUrl);

To redirect to Previous page

$this_redirectReferer($defaultUrl=null);

Answer 2

to redirect to home url try to use Url Helper instead of Customer Helper
Mage::helper('url')->getHomeUrl(); @see Mage_Core_Helper_Url::getHomeUrl()