How can I validate a "yyyy-MM-dd'T'HH:mm:ssZ" date/timestamp in UTC with Perl?

Code开发者_如何学运维 would be nice but a point in the right direction is good as well.

CPAN? RegEx?

I've seen both ways

"yyyy-MM-dd'T'HH:mm:ssZ";

"yyyy-MM-ddTHH:mm:ssZ";

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Ether is definitely on the right track with DateTime. Using DateTime, you can be sure that you have a time that actually exists, where something on Feb 29, 2000 might get by if you wrote the checks yourself.

Your format looks like an ISO8601 string. So, use DateTime::Format::ISO8601 to do your parsing.

use DateTime;
use DateTime::Format::ISO8601;

my $string = '2010-02-28T15:21:33Z';

my $dt = DateTime::Format::ISO8601->parse_datetime( $string );
die "Impossible time" unless $dt;

You could use other format modules, such as D::F::Strptime, but you will wind up recreating what ISO8601 formatter already does.

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Depending on what you're doing, you might want to coerce your string into a DateTime object, e.g.:

use DateTime::Format::MySQL;
my $dt = DateTime::Format::MySQL->parse_datetime( '2003-01-16 23:12:01' );

Then you can easily output your time string in a different format, perform calculations with it, etc.

You didn't specify what is generating the string in that particular format, but there are DateTime::Format:: modules for a large number of input sources.