Magento: Detect if admin is logged in in frontend pages

Question

I have created a magento extension. I want to implement access to the extension. The extension creates a page in frontend and i want only admin to access that page. So basically

Answer 1

It is quite simple but not a recommended solution. I myself spend number of hours to do this. For, windows based server try below solution:

$sessionFilePath = Mage::getBaseDir('session').DS.'sess_'.$_COOKIE['adminhtml'];
$sessionFile     = file_get_contents($sessionFilePath); 
$exp_cookie   = explode(';',$sessionFile);
if(count($exp_cookie)   >   100)
{
  return "login";
}
return "expire";    

For, Linux based server try below solution:

$sessionFilePath = Mage::getBaseDir('session').DS.'sess_'.$_COOKIE['adminhtml'];
$sessionFile     = file_get_contents($sessionFilePath); 
$exp_cookie   = explode('--',$sessionFile)
if(count($exp_cookie)   >   10)
{
  return "login";
}
return "expire";

Thanks, Kashif