Howto display Graphs/Monitored data on web browser ?

[Nalin Gupta]

Hello,

I am newbie to web programming, though a did bit 10 years back.
I have to do this for embedded device, which is running some
simple minimal web server as of now.

On browser, I need to display (say) a simple graph, with X-axis and Y-axis.
Say throughput or CPU Performance extra. (refresh it at run time)

How to do this whole thing ?

Any existing support from any freeware or any thing.

I understand, web server need to do streaming of data.
For this web browser should do polling or so.

FYI,
0. There need to be only 1 client for the server in our case.
1. I wish to move most computing on browser side.
2. E.g. gnuplot genrates PNG images, I wish if that could be done
at browser. How ? I have no clue ?
3. I do not want to ship PNG/Image files from web server.

I just came across AJAX. Will this along with javascript / XML help me.
Any existing Applet or anything, which I can put on web page.

I also came across gnuplot, but do not know how to run that with refreshed data file from inside web browser.

Thanks for any pointers, I need them very much.

regards,
- nalin

[abducted]

I'm far from guru status so you should take this comment as only a possibilty, but Scalable Vector Graphics might be something worth looking into. You can insert javascript code to control what is plotted, and even use a timeout function for javascript powered animation, but I do not know if the ajax XML HTTP request would work.

[abducted]

Here's a link that I found:

http://www.jibbering.c om/2002/5/dynamic-update-svg.html