Weird error after a configuration change

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

I have this part of admin.pl script which checks one param of referer script called param('Apostoli!);

##############################################################
my $action    =  param('action');
#============ REDIRECT TO PROPER SCRIPT ===================
if( ($action eq 'Apostoli') && ($ENV{HTTP_REFERER} =~ /
index/) )
##############################################################
[download]

and iam gettign thsi error now: Fri Apr 27 22:28:11 2007 error client 10.0.0.2 Fri Apr 27 22:28:11 2007 admin.pl: Use of uninitialized value in string eq at D:\ \www\\cgi-bin\\admin.pl line 26., referer: http://dell/

Line 26 is the line with if. All this happened when i deleted the d:\www\index.html file which was pointing to d:\www\cgi-bin\index.pl through a javascipt call and set apache to load /cgi-bin/ index.pl directly when http://localhost.

Comment on Weird error after a configuration change Download Code

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Re: Weird error after a configuration change by jdporter (Paladin) on Apr 27, 2007 at 20:56 UTC
You should probably test all scalars (both `$action` and `$ENV{HTTP_REFERER}`, in this case) for defined-ness before doing string tests on them. However, `'Use of uninitialized value'` is not an error, it's a warning. You should probably also ensure that http headers are being issued by your program before any other output, so that warning messages such as this don't cause CGI/HTTP errors. A word spoken in Mind will reach its own level, in the objective world, by its own weight	[reply] [d/l] [select]
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Re: Weird error after a configuration change by shigetsu (Hermit) on Apr 27, 2007 at 20:55 UTC
My guess is that `my $action = param('action');` [download] yields an undefined value, thus `$action eq 'Ξ‘Ο€ΞΏΟƒΟ„ΞΏΞ +»Ξ®!'` [download] is responsible for the "`uninitialized value in string eq`" warning. Are you sure your index.pl is being invoked with the same query string as before?	[reply] [d/l] [select]
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Re: Weird error after a configuration change by blazar (Canon) on Apr 29, 2007 at 19:55 UTC
Line 26 is the line with if. All this happened when i deleted the d:\www\index.html file which was pointing to d:\www\cgi-bin\index.pl through a javascipt call and set apache to load /cgi-bin/ index.pl directly when http://localhost. Once again, why don't you say that you posted the very same question in clpmisc? (link @ GG.)	[reply]
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