Without knowing what the errors are there's little anyone can do to help. Like going to the doctor but not telling them any of your symptoms. Provide the details needed for others to understand your system/setup. Show the errors you find in the logs.

"Also , if i want to do it using a module instead of cgi , how to do it. Should I be loading cgi modules within that module and then do it or is there any better way?"

If I understand you correctly you're currently using CGI. If I were starting anything new (web based) I'd use Dancer, other modern frameworks exist. Dancer has extensive documentation and example code.

When posting here links are displayed by default, including How do I compose an effective node title? and How do I post a question effectively?. Please read and understand them at least once.

Update: Since you're using CGI Tutorials->Web Programming->CGI Programming->Ovid's CGI Course is worth reading, since you need help debugging your cgi scrips.

Thanks for the response. The second cgi script inserts data into db. Lets say i mess the insert query. So the script would ideally break with an error. But the problem is error is thrown to the server error log. But parent cgi script which called this db inserting cgi script is not aware of the error that happened.

Then you should look at the web server (you don't say which) error logs. For Apache this is error_log. Failing that if you read the link I gave you specifically for learning how to use CGI you'll find out how to dump errors in the browser.

Still not useful info: post code and error messages, verbatim. Anything else we might do is navel-gazing and WAGs.




check Ln42!

The idea is to refactor the portions of your code that can be shared by A.cgi and B.cgi. Consider the following:

my $data = 'pretend this is a complex data structure';
my $is_web_browser = 1;

if ($is_web_browser) {
    print qq(<span color="red">$data</span>\n);
}
else {
    print qq(\e[0;31m$data\e[0m\n);
}
[download]

file: SomeModule.pm

package SomeModule;
use strict;
use warnings;

sub get_data {
    return 'pretend this is a complex data structure';
}

1;
[download]

file: app.cgi

use strict;
use warnings;
use SomeModule;

my $data = SomeModule::get_data();
print qq(<span color="red">$data</span>\n);
[download]

file: app.pl

use strict;
use warnings;
use SomeModule;

my $data = SomeModule::get_data();
print qq(\e[0;31m$data\e[0m\n);
[download]

This is a very simple and distilled example, but hopefully you see how different apps can reuse the same modules without actually executing each other as a script.

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)

Thanks , So if i am passing the form data of cgi ( i.e. the $ENV{QUERY_STRING} to this module ) , in that case I should be splitting it using split function and extract the param from there right ?

No, you use CGI module, CGI is your interface to QUERY_STRING ...  CGI->new reads QUERY_STRING and form data ... then you can $query->url_param('key') or $query->param('key') or both

See Tutorials: Web Programming: CGI Programming

CGI Programming 101

Ovid's CGI Course

Dancer and CGI are just ways for computer programs to speak internet, you should learn about the internet :)

Don't "call" other cgi's from a cgi ... whatever you mean by "call"

using system or exec to call other cgis is a fudgy idea,

fudgy , unless you're clever enough to write your cgis to take @ARGs, but then if you did that you wouldn't call them cgis :) and you'd be clever enough to use Capture::Tiny to capture anything your cgi prints on STDERR or STDOUT

but if you wrote both programs, and the second is really just a part of the first, then yeah, it shouldn't exist, it should be part of your module ... yeah, your real cgi should be

#!/usr/bin/perl --
...
use MyModule;
MyModuule::DoTheCgiDance();
[download]

If you still need the "other" then you can have that one too

#!/usr/bin/perl --
...
use MyModule;
MyModuule::DoTheCgiDanceOTHER();
[download]

:)

If I have to pass the form data to this perl module , How should I be doing it.

Should i pass the "param" from cgi to this module and split it using split function ?

:) Form data comes from CGI object, you can pass this $query around ... example

sub MyModuule::DoTheCgiDance {
    my $query = CGI->new; ## FORMDATA
    my( $headers, $body ) = DoTheDance( $query );
    print $headers, $body;
}
[download]

Re^5: I need help with displaying newline or paragraph using perl on my website (pass arguments more subs), CGI Programming, Mojolicious::Lite +and jQuery +AJAX + Mojo::Template

If you are transitioning from CGI to modernity, then I would recommend looking at CGI::Application. I still use it and it works well in many situations. However, it is not persistent. This shouldn't matter to you at this point.

CGI::Application encourages modularity and introduces you to a sane way to manage a request life cycle. Once you cut your teeth there, then you can look at the plethera of frameworks out there.