[whatwg] Video with MIME type application/octet-stream

Philip Jägenstedt philipj at opera.com
Wed Sep 1 07:23:57 PDT 2010

On Wed, 01 Sep 2010 15:14:10 +0200, Boris Zbarsky <bzbarsky at mit.edu> wrote:

> On 9/1/10 4:12 AM, Philip Jägenstedt wrote:
>> If we start ignoring the Content-Type I expect we would also add
>> sniffing so that opening a video served with the wrong (or missing)
>> Content-Type still works in a top-level browsing context, as it does for
>> images (I think).
> It can't possibly work for images.  If I send a file as text/html, and  
> you load it from an <img> then you will render it as an image (possibly  
> a broken one).  If you load it from a toplevel browsing context you will  
> render it as text/html, even if it's image data (where "you" possibly  
> excludes IE/Windows, which will do some sniffing in that situation).

Huh, I guessed incorrectly, neither serving a PNG as text/plain or  
text/html makes it be sniffed and rendered in a top-level browsing context  
in Opera. However, both work in IE8.

Why do you say that it can't possibly work? Are there any security risks  
with the browser potentially interpreting a plain text or HTML document  
and failing to decode it? Anything else?

Philip Jägenstedt
Core Developer
Opera Software

More information about the whatwg mailing list