I build de demo script (for firefox) here :
http://experiments.benvii.com/blob_content_length/
You will also notice that the player's load event isn't called.
Content-Length should be added to firefox (maybe open a ticket on
https://bugzilla.mozilla.org/) but it should also be recommended in the
section "11.7.3. Request and Response Headers" of the spec.
Thanks for responding.
Benjamin BERNARD
Le 12/08/2012 21:23, Jonas Sicking a écrit :
On Sun, Aug 12, 2012 at 2:56 AM, Benjamin BERNARD
<[email protected]> wrote:
Hi,
I was developing an offline music web App when I discover that is no
"Content-length" header specified here :
http://www.w3.org/TR/FileAPI/#ProtocolExamples
So when you play an audio/video file stored as a blob (under a blob URI)
it's considered by the player as streaming content which means you can't get
the duration of a song for instance (it has an infinite duration). I think
it might be the consequence of not providing a content-length header.
I experienced it using Firefox I heard Internet Explorer already provide
this header.
Moreover, I don't understand why there is no content-length header
recommended in the spec because when you use URL.createObjectURL(blob), blob
has a finished size (correct me if I'm wrong). So a content-length header
should also be provided and recommended in the spec.
Yes, I agree, we should have a content-length header similar to the
content-type header.
In Gecko things are a bit complicated because we don't have headers on
anything but http channels. But we do have the concept of a length of
a response for all channels so that should take care of it. Not sure
off the top of my head why it doesn't. Filing a bug with an example
would be great.
/ Jonas
