atompub-multipart-01: browser implementation

[Bill de hOra <bill@xxxxxxxxxx>]

http://www.ietf.org/internet-drafts/draft-gregorio-atompub-multipart-01.txt

When doing multipart, browsers/AJAX can't load files from the file 
system. As a result XHR objects generally can't submit non-text content. 
The standard (only?) workaround for this is a hack that allows a form 
post to be sent via a hidden iframe. At that point there's no way to set 
headers and the client is limited to application/x-www-form-urlencoded 
or multipart/form-data (due to HTML forms).

Short version: I think this draft can't be implemented in a browser [1].

Bill

[1] 
http://www.dehora.net/journal/2008/06/18/atompub-multipart-media-creation-draft-01/#comments