How to get post parameters and print/log them in Perl

leela11krishna has asked for the wisdom of the Perl Monks concerning the following question:

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Re: How to get post parameters and print/log them in Perl by Corion (Patriarch) on Nov 11, 2016 at 07:09 UTC
For the simplest solution, see CGI and its `->multi_param` or `->param` method.	[reply] [d/l] [select]
Re: How to get post parameters and print/log them in Perl by 1nickt (Canon) on Nov 11, 2016 at 00:54 UTC
Sure, here you are: `my %parameters = params;` [download] Hope this helps! The way forward always starts with a minimal test.	[reply] [d/l]
Re: How to get post parameters and print/log them in Perl by Linicks (Scribe) on Nov 11, 2016 at 14:27 UTC
I use this on a couple of my CGI scripts... I just use sed thus in the perl code: `sed -i '1i $var1 $var2 $var3' /path/to/log/log.txt`; If you use this, the file MUST not be empty to start with, so I just put at the top the date the log was created. It also adds the new entry at the top. Nick P.S. ummm, for some reason the code tags fail here...	[reply] [d/l]
Re^2: How to get post parameters and print/log them in Perl by marto (Cardinal) on Nov 11, 2016 at 15:04 UTC
What if `$var1` contains something like this: `my $var1 = "\\'; cat /etc/passwd";`? I'm unsure why you'd want to use sed rather than perl to write some data to a file.	[reply] [d/l] [select]
Re^3: How to get post parameters and print/log them in Perl by Linicks (Scribe) on Nov 11, 2016 at 15:36 UTC
Well, it depends on the context - for known data input, I would rather use existing tools than re-invent the wheel. In the example you gave, surely some sort of user input sanitisation goes on first? Nick	[reply]
Re^4: How to get post parameters and print/log them in Perl by marto (Cardinal) on Nov 11, 2016 at 15:49 UTC
Re^5: How to get post parameters and print/log them in Perl by Linicks (Scribe) on Nov 11, 2016 at 16:09 UTC
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Re^2: How to get post parameters and print/log them in Perl by Anonymous Monk on Nov 15, 2016 at 08:02 UTC
I just use sed ... Yeah, lots of people use perl as a replacement for bash/csh ... nothing wrong with that But even in 1994 even amateur bash programmers acknowledged the crazy insecurity of writing cgi programs in bash ... using sed from perl or bash or any programming language, to print out some CGI data into a file , its about as silly as programming can get but as actual advice to someone else, its mean and it stinks	[reply]
Re^2: How to get post parameters and print/log them in Perl by Anonymous Monk on Nov 15, 2016 at 07:48 UTC
P.S. ummm, for some reason the code tags fail here... The code tags are working fine `just like these code tags` but single-line mostly don't end up in `download code`	[reply] [d/l] [select]