Autologin with referer IP address

It’s me again,

with a solution for the feature request “autologin with specific referer host name(s)”.

Now it is possible to autologin into the blog frontend, if the user is comming from a specific website.

I extended the function doHeadActions() in file wp-content/plugins/password-protect-wordpress/pluginCallbacks.php after this lines of code:

function doHeadActions()
{
  $isEnabled = $this->_settings()->fetchSetting( "enabled" )->getValue();
    if( $isEnabled == "off" ) {
      //protection is disabled
      return;
  }

with my new code:

// autologin by referer host
  $referer = @$_SERVER['HTTP_REFERER'];
  $checkRefererHosts = array('www.source.net');
  if (isset($referer)) {
    $aParsedUrl = parse_url($referer);
    if (isset($aParsedUrl['host'])) {
      $refererHost = $aParsedUrl['host'];
      if (in_array($refererHost, $checkRefererHosts)) {
        //refresh logged in cookies
        $this->setCookie();
        return;
      }
      else {
        $isLoggedIn = apply_filters( $this->_slug( "isLoggedIn" ), false );
      if (false === $isLoggedIn ) {
	do_action( $this->_slug( "displayLoginPage" ) );
	exit;
      }
    }
  }

It works fine, but It’s not update safe.
Couldn’t it be a new feature in further releases of the plugin?
The referer hosts (checkRefererHosts) should be defined in settings of the plugin.

Greets TJ

FYI, you’re missing a “{” at the end of line 14.

Perhaps you can help me with my need, which is to allow Facebook’s crawler to see my content without a password. I tried the following, right where your code starts (instead of yours), with no luck:

$userAgent = "";
		$userAgent = @$_SERVER['HTTP_USER_AGENT'];
		if (strpos($userAgent, 'facebookexternalhit') !== FALSE) {
			//refresh logged in cookies
			this->setCookie();
		    return;
		}
		else {
			$isLoggedIn = apply_filters( $this->_slug( "isLoggedIn" ), false );
		}
		if (false === $isLoggedIn ) {
			do_action( $this->_slug( "displayLoginPage" ) );
			exit;
		}

I even tried just a:

‘
this->setCookie();
return;
‘

to try and make everything go around login…and it’s not working. So what obvious point am I missing?