THttpServer and a web page autoupdate?

ROOT
1

Dear ROOT experts,

I’m running a data quality monitoring job with THttpServer rendering the histograms.
I’m setting the URL=http://localhost:8877/win4/?monitoring=2000 in hope that the page would be updated every two seconds. That doesn’t happen. I can update the page manually by clicking on a “Reload RBrowser” icon, but an automatic update seems to be disabled.

The outcome doesn’t depend on whether I’m trying to display a browser page or a page displaying a canvas with a histogram drawn on it.

Most likely, I’m not specifying all needed options, so I’d appreciate an expert advice on how to specify a ‘refresh page’ behavior.

– thanks, regards, Pasha

_ROOT Version: 6.32.08
_Platform: alma linux 9
_Compiler:gcc13

dqm_002
dqm_0022109×1172 103 KB

2

Hi,

You are showing screenshot of RBrowser.

This kind of application does not support monitoring URL parameter.
But you can simply use TCanvas functionality like:

c->Modified();
c->Update();

And call this every time when you want to update drawing in the RBrowser.
Most convenient way is to use TTimer to configure regular actions in the ROOT.

Regards,
Sergey

3

Sergey, thanks a lot !