I'm trying to have a CGI script ("a.pl") call another CGI script ("b.cgi"), using system(). ("b.cgi" is used elsewhere; I just want to grab its (json) output and do things with it (using Capture::Tiny).

This works fine from the command line, but from the browser, "b.cgi" doesn't get the parameters that "a.pl" sends... or rather, the parms end up in @ARGV rather than $query->param.

Here's a minimal example. In this example, I'm not trying to process b.cgi's output in a.pl... I just want to show that b.cgi is not getting the parameters in $query->param.

a.pl

#!/usr/bin/perl
use strict;
use warnings;
my @args = ("animal=duck", "vegetable=carrot");
system("/usr/bin/perl", "/tmp/b.cgi", @args);

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and b.cgi:

#!/usr/bin/perl
use warnings;
use strict;
use CGI;

my $query = new CGI;

print "Content-type: text/plain\n\n";

print "b.cgi query dump:\n";
print $query->Dump . "\n";
print "b.cgi argv dump:\n";
print join(',', @ARGV);
print "\n";

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Output when a.pl is invoked from the command line:

Content-type: text/plain

b.cgi query dump:
<ul>
<li><strong>animal</strong></li>
<ul>
<li>duck</li>
</ul>
<li><strong>vegetable</strong></li>
<ul>
<li>carrot</li>
</ul>
</ul>
b.cgi argv dump:
animal=duck,vegetable=carrot

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Output when a.pl is invoked through the browser:

b.cgi query dump:
<ul></ul>
b.cgi argv dump:
animal=duck,vegetable=carrot

[download]

Is there some difference between a command-line invocation and a system() invocation?

I'm clearly misunderstanding something here... Any help you could give would be... well... helpful!

update: spelling

In reply to Invoking a cgi script from another cgi script using system() by bibliophile

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