title: Sending pdf as attachment causes undefined error in Chrome browser
body: <p>Using Django, I am sending a pdf file from the server. If I send it as an attachment using:</p>
  
  <pre><code>response['Content-Disposition'] = 'attachment; filename=test.pdf'
  </code></pre>
  
  <p>it downloads fine, but in the Chrome console there is an error:</p>
  
  <pre><code>GET http://12.345.678.09/vpas/?print_confirm=true undefined (undefined)
  </code></pre>
  
  <p>If I send the pdf without setting the Content-Disposition of the response, there is no error. What is the cause of this error and how can I get rid of it?</p>
  
  <p>This is the http (from Firefox - couldn't get as many details from Chrome):</p>
  
  <pre><code>http://12.345.678.09/vpas/?print_confirm=true&amp;vpa_id_to_print=2355
  
  GET /vpas/?print_confirm=true&amp;vpa_id_to_print=2355 HTTP/1.1
  Host: 12.345.678.09
  User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.17) Gecko/20110420 Firefox/3.6.17 GTB7.1 (.NET CLR 3.5.30729)
  Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
  Accept-Language: en-us,en;q=0.5
  Accept-Encoding: gzip,deflate
  Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
  Keep-Alive: 115
  Connection: keep-alive
  Cookie: sessionid=fdabaccd2a731fd459cd5d6c3f5004f1
  Cache-Control: max-age=0
  
  HTTP/1.1 200 OK
  Server: nginx/0.5.33
  Date: Mon, 02 May 2011 00:59:48 GMT
  Content-Type: application/pdf
  Transfer-Encoding: chunked
  Connection: keep-alive
  Vary: Cookie
  Content-Disposition: attachment;
  Set-Cookie: sessionid=fdabaccd2a731fd459cd5d6c3f5004f1; expires=Mon, 02-May-2011 01:59:48 GMT; Max-Age=3600; Path=/
  </code></pre>
  
  <p>This is the http I could get from Chrome:</p>
  
  <pre><code>Request URL:http://12.345.678.09/vpas/?print_confirm=true&amp;vpa_id_to_print=2355
  Request Headers
  Accept:application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
  User-Agent:Mozilla/5.0 (Windows NT 5.1) AppleWebKit/534.24 (KHTML, like Gecko) Chrome/11.0.696.60 Safari/534.24
  Query String Parameters
  print_confirm:true
  vpa_id_to_print:2355
  </code></pre>