Re: [rtcweb] Data transfer

Magnus Westerlund <magnus.westerlund@ericsson.com> Fri, 16 September 2011 14:07 UTC

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Date: Fri, 16 Sep 2011 16:09:48 +0200
From: Magnus Westerlund <magnus.westerlund@ericsson.com>
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Subject: Re: [rtcweb] Data transfer
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On 2011-09-16 16:01, Iñaki Baz Castillo wrote:
> 2011/9/16 Olle E. Johansson <oej@edvina.net>et>:
>> "The goal is to enable innovation on
>>
>>   top of a set of basic components.  One core component is to enable
>>   real-time media like audio and video, a second is to enable data
>>   transfer directly between clients."
>>
>> Most of the discussions on the list has been about the media. What are the
>> ideas for data transfer? Applications?
> 
> Hi. Just my opinion:
> 
> Having WebSocket protocol I don't see the need for a separate/specific
> data transfer protocol within WebRTC. WebSocket already allows
> bidirectional traffic for carrying long text or binary data (I means
> even GigaBytes of data).
> 
> Also, HTML5 offers some cool features for "downloading" data received
> by the JavaScript code. See a demo:
> 
>   http://html5-demos.appspot.com/static/a.download.html
> 

The argument for having a peer to peer unreliable datagram channel has
been two:

1) Minimal delay by direct peer-to-peer connection instead of going
through a central server. This as you can't normally establish a
websocket connection to a browser behind a NAT/FW.

2) Scalability by not requiring a server or having to handle the data
flows at all on the server side.

As an individual I think these arguments are good, and assuming we can
find a reasonable solution that fulfills the requirements we should
specify it.

Cheers

Magnus Westerlund

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