when is the web module is created / destroyed?
lazarus / 38-Networking and Web Programming

----------------------------------------------------------------------
egsuh · 2020-05-24 06:58

Hi,
I've developed a web-server application using fpweb.  Two webserver
applications with the same TFPWebModules, one in CGI and another in
FCGI.

With CGI model, I have two TFPWebModules (let's say wm1, wm2) and one
TDataModule (dm1).  DM1 contains database access and common functions.

My question is, I cannot put any of these modules in the "Auto-create
forms". They are just in available forms.

Well, the web modules (wm1 and wm2) seem to be created automatically
because the application works even I did nothing to create them.

But where should I create dm1? 

Well, I can put it in the OnDataModuleCreate event handler of wm1. For
example,

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i procedure
Twm1.DataModuleCreate(Sender: TObject);begin   dm1 :=
Tdm1.Create(nil);   Log('wm1 created')end; 
But then,  Twm1.DataModuleDestroy is not called even in the CGI model.
So I cannot destroy dm1.
If I access web-server again, the dm1 is created again. This is quite
big memory loss.

When are the web modules are created? And how can I destroy them?

----------------------------------------------------------------------
trev · 2020-05-24 12:55

I'm not familiar with web and data modules, but I have written many
CGI programs. As for destroying modules, this should surely happen by
default when the CGI program terminates. CGI programs are not
persistent. They get loaded by a request to the web server, they run
and then they (should) terminate.

Perhaps your CGI programs are not terminating for some reason?

----------------------------------------------------------------------
egsuh · 2020-05-25 08:17

QuotePerhaps your CGI programs are not terminating for some reason?
That depends on the module kind. If I set it as wkOneShot, it is
automatically terminated.  But not if set to wkPooled. In CGI module,
this should not make any differnece, but it does. It seems to be a
kind of bug (I think this is already reported to bug-tracker).