[Sugar-devel] Collaboration support for sugar web activities

Daniel Narvaez dwnarvaez at gmail.com
Sat Jan 18 06:19:24 EST 2014

Interesting! Are you planning to use a js actitvity or a python one as

On 18 January 2014 01:21, Emil Dudev <emildudev at gmail.com> wrote:

> Busy month...
> Anyway, I checked out telepathy and tried to fix the many protocol
> problems. Sadly, I gave up pretty easily. I suppose it would be easier to
> rewrite the whole process from scratch.
> Today I was able to recreate the basic functionality of TogetherJS'
> server. From a nodejs server, I rewrote it in python (using gwebsockets).
> This will give me the ability to customize it freely.
> Tomorrow I plan on building the basic invitation process using web
> sockets. I suppose it will be more reliable than telepathy. And it would
> possibly be better for an Android app or other systems with limited
> functionality.
> About WebRTC: I really think that peer-to-peer connections are needed. But
> at this point, I'll go with client-server connections.
> gwebsockets: https://github.com/edudev/gwebsockets/tree/master
> websocket-server: https://github.com/edudev/web-reply
> Emil Dudev
> On Sun, Jan 12, 2014 at 8:51 PM, Daniel Narvaez <dwnarvaez at gmail.com>wrote:
>> On 12 January 2014 19:01, Emil Dudev <emildudev at gmail.com> wrote:
>>> About the telepathy part to send only the invites and establish the
>>> connection:
>>> I can't seem to be able to complete the invitation accepted process.
>>> Sometimes it works, sometimes not (mostly not). For normal sugar activities
>>> it's the same (with the exception that with them it mostly works, at least
>>> I think it works).
>>> Exchanging the TogetherJS ID is not a problem. The invited user can't
>>> seem to connect to the telepathy channel properly.
>>> As you noted above, it's a protocol mess.
>>> If telepathy is completely dropped for web activities, then a question
>>> arises: how to send the invite with the unique ID?
>> I don't know the details of the current invitation protocol. I suppose
>> you could register a "private" activity with the server and then send a
>> token to the invitee. Making this up as an example, not really well thought
>> :)
>>> Also, I still don't like using 1 server and having everything else
>>> depend on that 1 server. The server would most likely have to process a lot
>>> of traffic.
>>> Would it be possible to use a peer to peer connection with web sockets?
>>> Browsers don't support this, with reason. But if sugar's core is used, it
>>> should be possible.
>> Did you investigate WebRTC? If nothing else I suspect it would allow to
>> exchange data between peers. I'm not sure if it provides any facility that
>> we could use to share presence information, i.e. a shared
>> buddies+activiities list. That's the really hard problem to solve if you
>> want fully p2p communication.

Daniel Narvaez
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