title: Chrome cannot recognize url encoded filename while downloading
body: <p>I tried to download a file with filename GB2312%D5%D5%C6%AC.JPG from my site, everything goes well in IE9/Firefox, but not in Google Chrome.</p>
  
  <p>In Google Chrome, this filename is replaced by my download page name (Maybe Chrome is failed to decode the filename).</p>
  
  <p>To find out if Chrome is tring to decode filename, I tried to use another string GB2312%2C%2D%2E.txt as the filename, firefox/IE9 still work as expected, but Google Chrome will try to decode this filename (replace %2D with '-').</p>
  
  <p>How to prevent Google Chrome from decoding filename? Better if I can solve this problem at my server side (PHP)</p>
  
  <p>The following lines are response headers generated by my server.</p>
  
  <pre><code>**Response Headers:**
  Cache-Control:must-revalidate, post-check=0, pre-check=0, private
  Connection:keep-alive
  Content-Description:File Transfer
  Content-Disposition:attachment; filename="GB2312%D5%D5%C6%AC.JPG"
  Content-Length:121969
  Content-Transfer-Encoding:binary
  Content-Type:application/force-download; charset=UTF-8
  Date:Wed, 18 Apr 2012 03:32:30 GMT
  Expires:0
  Pragma:public
  Server:nginx/1.1.5
  X-Powered-By:PHP/5.3.8
  </code></pre>