Re: timezone-related bug in DateTime::Format::W3CDTF?

[Dave Rolsky]

On Thu, 29 Oct 2009, Pete Hodgson wrote:

Ever since British Summer Time ended in the UK last week my application 
has been seeing a very interesting bug. Here's an isolated perl script 
which demonstrates the issue:


This is a known bug - see 
http://rt.cpan.org/Public/Bug/Display.html?id=22802


I've emailed the maintainer to see if he still wants ownership of the 
module. If not, I'll probably apply a few patches and make a new release.


BTW, if anyone else out there wants to maintain this module, please let me 
know.



-dave

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timezone-related bug in DateTime::Format::W3CDTF?

[Pete Hodgson]

Hi Folks,

Ever since British Summer Time ended in the UK last week my application 
has been seeing a very interesting bug. Here's an isolated perl script 
which demonstrates the issue:



   #!/usr/bin/perl
  
   use strict; use warnings;
  
   use DateTime::Format::W3CDTF;

   use DateTime::Format::ISO8601;
  
   my $tz = 'Europe/London';
  
   sub print_formatted_date {

 my $date = shift;
  
 my $tz_date = DateTime::Format::ISO8601->new->parse_datetime( $date );

 $tz_date->set_time_zone( $tz );
  
 print "tz_date:  $tz_date\n";

 $tz_date->set_formatter( DateTime::Format::W3CDTF->new );
  
 print "tz_date with W3C formatter: $tz_date\n";

   }
  
  
   print_formatted_date( '2009-10-25' );

   print "\n";
   print_formatted_date( '2009-10-26' );



The output of this is:


   tz_date:  2009-10-25T00:00:00
   tz_date with W3C formatter: 2009-10-25T00:00:00+01:00
  
   tz_date:  2009-10-26T00:00:00

   tz_date with W3C formatter: 0



Notice that for dates which fall outside of BST the W3C formatter is 
rendering them as '0'.


This is an issue for me because a 3rd party library which my app uses is 
using DateTime::Format::W3CDTF to format parameters during a SOAP call. 
Because the formatting is failing the calls are failing.


Could this be a bug in the DateTime::Format::W3CDTF library? I'm no perl 
guru so any help would be really appreciated. Please do ask away if 
there is any other pertinent information I can provide which would shed 
light on this.


Cheers,
Pete