[whatwg] File API Streaming Blobs

Ian Hickson ian at hixie.ch
Tue Jun 14 16:59:27 PDT 2011

On Mon, 21 Mar 2011, Simon Heckmann wrote:
> I found this thread 
> (<http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2011-January/02997 
> 3.html>) in the archive of this mailing list, but I could not determine 
> if any decision was made whether this should be implemented or not. I am 
> interested in this, because I came up with a scenario which would 
> benefit from Streaming Blobs:
> I use the File API to locally store larger video files on the users hard 
> drive. For security purposes I encrypted them with AES and use a 
> javascript library for local just-in-time decryption. This is not yet a 
> productive application bur more of a prototype. However, I experienced 
> javascript manipulation of large data can be quite slow so we do not 
> want the user to wait until the full video is decrypted/manipulated. 
> Therefore I would vote for a way to append data to a Blob and the 
> ObjectURL reflects these modifications. Maybe something like 
> createStreamableObjectURL could be used for differentiation?
> Just wanted to express my thoughts because I think the whole File API is 
> a great idea!

I recommend forwarding your suggestion to the W3C public-webapps at w3.org 
mailing list, which is where discussion of the File API specs more usually 
takes place.

Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'

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