to Get Google Reader Token codes

想写一个脚本把Google reader上我订阅的所有Feed里的图片抓下来（最近订了几个毛图站，哈哈）。看了Google Reader API，挺简单。但比较讨厌的是如果要设置一个read-listing里的item为已读，则要用到token。在网上找了一圈没有。。妈的，只好自己写。这个token不只是要Google登陆验证，有两个步骤，请看代码：

/*  ------- start code -------  */
   $authentication_url = 'https://www.google.com/accounts/ClientLogin';
 
   $ch = curl_init();
   curl_setopt($ch, CURLOPT_URL, $authentication_url);
   curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
   curl_setopt($ch, CURLOPT_HEADER, 0);
   curl_setopt($ch, CURLOPT_POST, true);
   curl_setopt($ch, CURLOPT_POSTFIELDS, "service=reader&Email=[your google account]&Passwd=[your pw]");
   ob_start();
   curl_exec($ch);
   $sid = ob_get_clean();
   curl_close($ch);

   $cookie = preg_replace('/[\r\n]/','; ',$sid);

   $ch = curl_init();
   curl_setopt($ch, CURLOPT_URL, 'http://www.google.com/reader/api/0/token');
   curl_setopt($ch, CURLOPT_HEADER, 0);
   curl_setopt($ch, CURLOPT_COOKIE, $cookie);
   ob_start();
   curl_exec($ch);
   $token = ob_get_clean();
   curl_close($ch);

   echo $token  //here you go baby.
/*  ------- end code -------  */