[Standards] File Repository and Sharing updates

Peter Saint-Andre stpeter at jabber.org
Wed Mar 14 17:38:44 UTC 2007


Nick Parker wrote:
> Peter Saint-Andre wrote:
>>> 1) Using XEP-0137 (SI)
>>>
>>> [...]
>>> I'm planning on entirely replacing my custom file requests with SI. In
>>> other words, I will be removing the "jabber" mirror type and replacing
>>> it with a new "si" mirror type which holds the same information as
>>> 0137's sipub element.
>>
>> Now, it is possible that SI-pub doesn't play well with transfers that 
>> don't use SI (think Jingle), so we need to think about that.
>>
>>> 2) Using Jingle for sending files
>>>
>>> I've skimmed the Jingle spec a couple times, but haven't seen anything
>>> yet which explicitly covers file transfers. Is something for this coming
>>> soon, or have I just been looking in the wrong places? 
>>
>> Google Talk uses Jingle for File Transfer. Some documentation here:
>>
>> http://www.xmpp.org/extensions/inbox/jingle-httpft.html
>>
>> We haven't published that yet officially, since the file transfer 
>> landscape is a bit unsettled right now. :(
>>
>>> Assuming there's
>>> something out there for sending files over Jingle, it seems like the
>>> best thing to do would be simply adding a "jingle" mirror type which
>>> holds the info for requesting the file. If, instead, Jingle file
>>> transfers can be requested with SI, then it can simply be listed as
>>> another SI mirror with a different 'profile' field.
>>
>> Yes that seems reasonable.
> 
> After looking through jingle-httpft and SI, it looks like there wouldn't 
> be any problem with using SI, at least as far as the listings are 
> concerned. File-transfer's "file" element can simply be replaced with 
> jingle-httpft's "description" element. Here's an example, plugging 
> httpft's Example 1 into 0137's Example 2:
> 
> <iq from='bard at shakespeare.lit/globe'
>     to='pubsub.shakespeare.lit'
>     id='ps1'>
>   <pubsub xmlns='http://jabber.org/protocol/pubsub'>
>     <publish node='characters'>
>       <sipub xmlns='http://jabber.org/protocol/si-pub'
>           from='bard at shakespeare.lit'
>           id='publish-0123'
>           mime-type='multipart/form-data(?)'
>           profile='http://jabber.org/protocol/si/profile/jingle-httpft'>
>         <description 
> xmlns='http://www.xmpp.org/extensions/xep-XXXX.html#ns'>
>           <manifest>
>             <file size='341'>
>               <name>file.txt</name>
>             </file>
>             <file size='51321'>
>               <name>picture.jpg</name>
>               <image width='480' height='320'/>
>             </file>
>             <folder>
>               <name>directory</name>
>             </folder>
>           </manifest>
>           <http>
>             <url name='source-path'>/source/23A53F01/</url>
>             <url name='preview-path'>/preview/90266EA1/</url>
>           </http>
>         </description>
>         </file>
>       </sipub>
>     </publish>
>   </pubsub>
> </iq>

That looks good. Do you have an updated proposal you could send along so 
that I can update <http://www.xmpp.org/extensions/inbox/fileshare.html>?
> 
> PS: A minor bug in the SI protocol: In Examples 2 and 3, the mime-type 
> field is "text/plain" for a PDF, should it instead be "application/pdf"?

Fixed in XEP-0137.

Peter

-- 
Peter Saint-Andre
XMPP Standards Foundation
http://www.xmpp.org/xsf/people/stpeter.shtml

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