Tuesday, June 29, 2010

IE8: content-disposition:inline, opens as download

We just had a pretty weird problem. Internet Explorer 8 decided to open some links as downloads instead of just navigating to the files as per usual. All normal browsers did not have this problem. I immediately checked the headers which revealed nothing out of the ordinary:

Server: Apache-Coyote/1.1
Cache-Control: public
Expires: Thu, 12 Jul 2012 19:13:38 GMT
Pragma: Thu, 12 Jul 2012 19:13:38 GMT
Content-Disposition: inline; filename="Recipe_Details_Attachments.htm"
Content-Type: text/html
Content-Encoding: gzip
Vary: Accept-Encoding
Date: Tue, 29 Jun 2010 19:13:38 GMT
Connection: close 
The Content-Disposition: inline; part tells me that the browser should not open this as a download.

My coworker who i now owe 6 beers suggested that because of IE's stupidity it is looking at the entire Content-Disposition line, and doing substring matching on first 'attachment' and then 'inline'. He was correct. IE stupidly saw this line as basically Content-Disposition:attachment;

The fix was to change the filename to something that did not include 'attachments'.


  1. Wow, that is absolutely retarded. Fuck Microsoft.

  2. Yeah absolutely. We have code that renames any files containing the string 'attachment' to 'btachment' when IE is used as a browser. It's one of the strangest browser hacks in our code base.

  3. fucking fanboys. now you'll claim this https://bugzilla.mozilla.org/show_bug.cgi?id=229075 is not just as retarded because it's a glorious open sores project.

    goddamn incompetent hypocrites.