arturo wrote:

        my %data = map { $_ => param ($_) } param();
[download]

While that will work for many cases, it fails with a query strings that have multiple values for a single name:

color=blue&color=red
[download]

There are two ways of resolving this. The first is map all hash keys to list references:

my %data = map { $_ => [ param($_) ] } param();
[download]

Because param() uses wantarray, it will return a list if called in that context. Accessing param names with a single value become $data{'someval'}->[0]. Some people might think that's a bit weird, so one could also do the following:

my %data = map { $_ => scalar @{[ param( $_ ) ]} == 1 ? param( $_ ) : 
+[ param( $_ ) ] } param;
[download]

With the following query string...

name=fred&color=red&color=blue
[download]

... the value for name can be accessed with $data{'name'} and the first value for color can be accessed with $data{'color'}->[0]

I don't like the second method because there winds up being two methods for accessing similar data. This will likely cause problems in the long run. Further, with the multiple calls to param(), it's less efficient. However, I really don't like either method (though I've posted similar stuff before) because when I see people blindly pulling in all of that data, they tend not to untaint it.

Cheers,
Ovid

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