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Perl Discussion Thread
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Apr 4th, 2009

500 Internal Error, But script runs on shell!

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Following is a perl script. It is running on shell when I go perl followed by the filename and works perfectly. But when I try to open it from browser, it gives back a 500. The permissions are fine because if i make some syntax error, it gives me the expected error message on browser screen:

PERL Syntax (Toggle Plain Text)
#!/usr/bin/perl
use strict;
use CGI;
use CGI::Carp "fatalsToBrowser"; 
use DBI;
use LWP;
 
my $cgi = new CGI;
 
my $url = "http://www.google.com";
 
my $browser = LWP::UserAgent->new;
 
my $content = $browser->get($url);
print $cgi->start_html(), $cgi->header();
 
my $doc= $content->content();
 
if(length($doc) > 100)
{
	extractMeta($doc);
}
 
print $cgi->end_html(), "\n";
 
sub extractMeta()
{
	print "Inside subroutine";
	#Databse Information
}
#!/usr/bin/perl
use strict;
use CGI;
use CGI::Carp "fatalsToBrowser"; 
use DBI;
use LWP;

my $cgi = new CGI;

my $url = "http://www.google.com";

my $browser = LWP::UserAgent->new;

my $content = $browser->get($url);
print $cgi->start_html(), $cgi->header();

my $doc= $content->content();

if(length($doc) > 100)
{
	extractMeta($doc);
}

print $cgi->end_html(), "\n";

sub extractMeta()
{
	print "Inside subroutine";
	#Databse Information
}

Can someone tell me whats killing it in the browser??

sid78669

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Apr 4th, 2009

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Re: 500 Internal Error, But script runs on shell!

The 500 is most likely caused by an error in your server setup rather than the code itself

jbennet

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Apr 4th, 2009

Re: 500 Internal Error, But script runs on shell!

Click to Expand / Collapse Quote originally posted by jbennet ...

The 500 is most likely caused by an error in your server setup rather than the code itself

Well, in that case, Its my college server. Someone must have crashed it! Thanks!!

sid78669

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Re: 500 Internal Error, But script runs on shell!

What platform and web server is it running?

jbennet

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Re: 500 Internal Error, But script runs on shell!

Click to Expand / Collapse Quote originally posted by jbennet ...

What platform and web server is it running?

I think its apache
2.0.63

sid78669

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Apr 4th, 2009

Re: 500 Internal Error, But script runs on shell!

the weird thing is its showing me syntax errors in the browser when i deleberately remove a semmi-colon or alike. But is not showing anything when everything is right. So i think it rules out the possibility of wrong permissions.

sid78669

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Apr 4th, 2009

Re: 500 Internal Error, But script runs on shell!

You need to print the header first, not second:

print $cgi->start_html(), $cgi->header();

should be:

print $cgi->header(), $cgi->start_html();

KevinADC

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Apr 5th, 2009

Re: 500 Internal Error, But script runs on shell!

Click to Expand / Collapse Quote originally posted by KevinADC ...

You need to print the header first, not second:

print $cgi->start_html(), $cgi->header();

should be:

print $cgi->header(), $cgi->start_html();

Thanks, you were right!!

sid78669

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