Parsing a Querystring With Perl (
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Having trouble parsing a querystring with Perl? If so, then Jeff's step-by-step
guide will save you headaches and have you up and running in no time!At first, parsing a CGI query sounds like a simple task. A query is just a list
of key-value pairs, so a hash sounds like the right tool. But many CGI query
parsers fail for anything other than what the specific query is they expect.
What if it's a POST when you expected GET? What if the pairs are delimited by ;
instead of &? What if the query is encoded via m/fd instead of a/xwfu? What
if there's more than one value for a field? And what about file uploads, a topic
I've not covered yet?
How quickly a simple function becomes complex. But
if we break the cases down into simple procedures, we'll see it's not as bad as
we thought.
