CGI script fails to execute in browser

revendar has asked for the wisdom of the Perl Monks concerning the following question:

Hello Monks, I'm trying to execute a CGI script from Chrome. The cgi handlers are enabled in the webserver. A small Hello world CGI script works when called from browser. I have a CGI script like mentioned below which loads some custom libraries and CPAN libraries which are installed extra

#!/usr/bin/perl

use CGI;
use Data::Dumper;
use lib::MyDatasource;
use JSON::XS;

print header();
print "Hello world\n";
[download]

Ths above code works when I comment lib::MyDatasource(which I have created) and JSON::XS(which i installed from CPAN). Also from UNIX cmd I can execute the script perfectly.

I have tried adding the lib folder to INC path, but in vain.

Please suggest.

Comment on CGI script fails to execute in browser Download Code

Replies are listed 'Best First'.
Re: CGI script fails to execute in browser (how does @INC work) by Anonymous Monk on Oct 20, 2014 at 07:12 UTC
lib::MyDatasource(which I have created) What did you do? How? What error messages did you get? Error messages explain everything :) Basically you need to add `use lib '/absolute/path/to/where/you/installed/modules'; use MyDatasource; ...;` [download] See lib, lib, lib, perlvar#@INC, perlrun#PERL5LIB, Re: -I flag being ignored and Simple Module Tutorial and even Re: package vs module? and Re: loop exits after printing the file, zentara package/module tutorial ) how does @INC work You basically need work through the checklists (do what each item says, if it solves the problem GREAT, if it doesn't move on to NEXT item), brian's Guide to Solving Any Perl Problem, CGI Help Guide , Troubleshooting Perl CGI scripts ... More generic advice :) On debugging, verify everything, talk to teddybear ... checklists and more Because https://httpd.apache.org/docs/2.2/howto/public_html.html#cgi / Apache Tutorial: Dynamic Content with CGI and more Copy/paste from Re: To call a .pl file when a button is pressed on a GUI created using Perl CGI (webserver) for the links below Its simple, you need a webserver Why? Because webpages and CGI needs a webserver, thats how it works Its weird that so many folks manage to create a GUI using Perl CGI without understanding this learn about the internet,Web Programming: For Beginners, to get an overall picture of how the internet works, how tcp/ip, sockets, html, ajax, all fit together.... See also Mojolicious::Lite +and jQuery +AJAX + Mojo::Template And a copy-pasta for you:) Also, there are checklists for that , Basic debugging checklist , brian's Guide to Solving Any Perl Problem, CGI Help Guide , Troubleshooting Perl CGI scripts Yes, work through these checklists, when you find a problem on the list, use a solution from the list, when you find a problem not on the list (rare), post the error message and problem description here brian's Guide to Solving Any Perl Problem, CGI Help Guide , Troubleshooting Perl CGI scripts So examine your server configuration and compare to https://httpd.apache.org/docs/2.2/howto/public_html.html#cgi / Apache Tutorial: Dynamic Content with CGI learn about the internet,Web Programming: For Beginners, to get an overall picture of how the internet works, how tcp/ip, sockets, html, ajax, all fit together. Explicitly using Options to permit CGI execution, Apache Tutorial: Dynamic Content with CGI - Apache HTTP Server Version 2.2 : Explicitly using Options to permit CGI execution ... let the deep links from the following explain Re: Cron revisited/Re^2: Perl Module Not Working In Crontab explain, and here they are: Perl/UNIX .profile problem Unix Aliases? Perl Script Not Working With Crontab Twig in a crontab? Running Perl program w/root privs via cron system call in crontab Perl & cron job environmental variables HowTo: Add Jobs To cron Under Linux or UNIX? Unix FAQ - Cron Unix FAQ - Cron Cron jobs do not inherit the login environment of the user Cron jobs do not have a stdin associated with them ... Cron Frequently Asked Questions Cron Job FAQ Basic Linux Operations FAQ Automating Tasks with Cron and Crontab files 4.4. Scheduling processes system command is not working I have some problem with Crontab perl file doesn't execute script fails loading module version, but > version is installed CGI Help Guide , Troubleshooting Perl CGI scripts Csh Programming Considered Harmful How do I set env. Variables from Perl with shell script Get default login environment Set shell environment variables from within a perl script How to change a script's environment after the script is already run, based on shell sourcing ? Perl: Source shell script to for environment variables? Reading and setting the environment from a shell script for the calling program Importing environment variables from shell script file to Perl sourcing a shell script/.profile and importing into %ENV setting perl ENV from file Changing parent process environment variable Re^3: DBD::mysql fail install check (DYLD_LIBRARY_PATH ldd otool install_name_tool VERSIONER_PERL_PREFER_32_BIT .bundle/.dylib/.so Making a system command work via a scheduled task. How to troubleshoot scheduled tasks in Windows XP and in Windows Server 2003 Re^6: pp and multiple perl scripts Basic debugging checklist , brian's Guide to Solving Any Perl Problem	[reply] [d/l]
Re^2: CGI script fails to execute in browser (how does @INC work) by revendar (Novice) on Oct 21, 2014 at 06:43 UTC
Thanks a lot. I will dig through all the links and will try to find the solution.	[reply]
Re: CGI script fails to execute in browser by thewebsi (Scribe) on Oct 21, 2014 at 07:42 UTC
Web servers often run in a different environment than the command-line. What I would suggest, since you seem to have Data::Dumper loading fine, is to dump out %ENV and @INC, and compare the results in the web server to your command-line. Look for environment variables that affect the path, such as PATH, PERLLIB/PERL5LIB, etc. You may want to update the web server configuration to set them differently. There are other ways to set paths depending on the web framework you are using. It's also possible for the web server to use an entirely different version of Perl than the command-line, so you might want to check for that too. Arnon Weinberg Back2Front - The Web Site People	[reply]