[JDEV] RE: File Transfer [was buddy icons]

Jens Alfke jens at mac.com
Mon Apr 9 12:51:35 CDT 2001


On Sunday, April 8, 2001, at 08:04 AM, Thomas Parslow (PatRat) wrote:

> This question was asked about a week ago I think, the answer given was
> that the limit for an XML node is 500k.
> I would have thought sending anything over a few k would cause a big
> problem for users with very slow connections (while it is being
> received no other messages can get through)....

Yup. This obviously isn't an issue for buddy icons, which would be 
~2kbytes.

For file xfers, at the time I suggested breaking the file into 
manageable chunks (32k?) and sending them as separate elements with 
sequence numbers, from which it would be really easy to reconstruct the 
file at the other end. Someone objected that this is an attempt to 
re-implement TCP, but it isn't since we already have a reliable channel 
and out-of-order delivery isn't a problem.

—Jens
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