[Kst] kdeextragear-2/kst/datapush [POSSIBLY UNSAFE]
staikos at kde.org
Tue Aug 12 17:11:07 CEST 2003
On Tuesday 12 August 2003 10:58, C. Barth Netterfield wrote:
> Do you have examples of 'dirfile' data files to test this on?
> Do you have a test program? Should I whip one up?
Still working on it. Essentially it works like this:
It then listens for arbitrary connections on its port (no access control is
implemented yet - this is up for discussion).
The incoming connections join in and send:
This means that 42 bytes have already been read and cached previous for this
file, so there is no need to resend them. 0\n is also acceptable. [Note:
right now it assumes you are picking up at the end of the file, which is
wrong because it creates a race. I need to fix this.]
The server then sends chunks of data as they arrive. I don't do
line-buffering in the server because it will slow it down, but it can be done
if we need to. I was thinking it's better to do that in the client for
performance reasons though.
I was also thinking that it would be possible to implement this directly in
Kst by inheriting from KstFile and making a specialised implementation. This
could do caching transparently.
Regarding testing: any data file works. I basically implemented "tail -f"
with a multiplexed network socket. My present test client is "telnet
localhost 4242". :-)
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