If I understand you correctly, then you're middleware is attempting to translate a set of key/value pairs from the user into a URL which is passed to your third party app.
I'll assume that the user input is pre-processed into a hash, and so you need to
- Strip out keys that have no meaning to the app
- Regularise the hash to ensure that the keys have the right case
- Turn it into a URL
The following code does steps 1 and 2 in rapid succession:
my %input = (
"NaMe" => "Fred",
"iD" => "123",
"PET" => "Cat",
"spoon" => "garbage",
);
my %caseCorrection =
(
"name" => "Name",
"id" => "ID",
"pet" => "pet",
);
my %output;
%output = map {
$caseCorrection{lc $_} => $input{$_}
} grep {
exists $caseCorrection{lc $_}
} keys %input;
my $getString = join ";", map {
"$_=$output{$_}"
} keys %output;
The above doesn't handle:
- Input keys which only differ by case. eg (id => 1, ID => 2)
- Encoding significant characters in the URL, eg "=" -> "%61"
Depending on what else is going on before this point, these may be non-issues.
It now occurs to me that I've not used the CGI module anywhere. I hope I've been barking up the right tree...
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