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- package Apache::ASP::Date;
-
- # This package code was taken from HTTP::Date, written by Gisle Aas
- # Copyright 1995-1997, Gisle Aas
- # This library is free software; you can redistribute it and/or
- # modify it under the same terms as Perl itself.
-
- use strict;
- use vars qw($VERSION @ISA @EXPORT @EXPORT_OK);
-
- require 5.002;
- require Exporter;
- @ISA = qw(Exporter);
- @EXPORT = qw(time2str str2time);
- @EXPORT_OK = qw(time2iso time2isoz);
-
- use Time::Local ();
-
- use strict;
- use vars qw(@DoW @MoY %MoY);
-
- #@DoW = qw(Sunday Monday Tuesday Wednesday Thursday Friday Saturday);
- @DoW = qw(Sun Mon Tue Wed Thu Fri Sat);
- @MoY = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
- # Build %MoY hash
- my $i = 0;
- foreach(@MoY) {
- $MoY{lc $_} = $i++;
- }
-
- my($current_month, $current_year) = (localtime)[4, 5];
-
-
- sub time2str (;$)
- {
- my $time = shift;
- $time = time unless defined $time;
- my ($sec, $min, $hour, $mday, $mon, $year, $wday) = gmtime($time);
- sprintf("%s, %02d %s %04d %02d:%02d:%02d GMT",
- $DoW[$wday],
- $mday, $MoY[$mon], $year+1900,
- $hour, $min, $sec);
- }
-
-
-
- sub str2time ($;$)
- {
- local($_) = shift;
- return undef unless defined;
- my($default_zone) = @_;
-
- # Remove useless weekday, if it exists
- s/^\s*(?:sun|mon|tue|wed|thu|fri|sat)\w*,?\s*//i;
-
- my($day, $mon, $yr, $hr, $min, $sec, $tz, $aorp);
- my $offset = 0; # used when compensating for timezone
-
- PARSEDATE: {
- # Then we are able to check for most of the formats with this regexp
- ($day,$mon,$yr,$hr,$min,$sec,$tz) =
- /^\s*
- (\d\d?) # day
- (?:\s+|[-\/])
- (\w+) # month
- (?:\s+|[-\/])
- (\d+) # year
- (?:
- (?:\s+|:) # separator before clock
- (\d\d?):(\d\d) # hour:min
- (?::(\d\d))? # optional seconds
- )? # optional clock
- \s*
- ([-+]?\d{2,4}|GMT|gmt)? # timezone
- \s*$
- /x
- and last PARSEDATE;
-
- # Try the ctime and asctime format
- ($mon, $day, $hr, $min, $sec, $tz, $yr) =
- /^\s* # allow intial whitespace
- (\w{1,3}) # month
- \s+
- (\d\d?) # day
- \s+
- (\d\d?):(\d\d) # hour:min
- (?::(\d\d))? # optional seconds
- \s+
- (?:(GMT|gmt)\s+)? # optional GMT timezone
- (\d+) # year
- \s*$ # allow trailing whitespace
- /x
- and last PARSEDATE;
-
- # Then the Unix 'ls -l' date format
- ($mon, $day, $yr, $hr, $min, $sec) =
- /^\s*
- (\w{3}) # month
- \s+
- (\d\d?) # day
- \s+
- (?:
- (\d\d\d\d) | # year
- (\d{1,2}):(\d{2}) # hour:min
- (?::(\d\d))? # optional seconds
- )
- \s*$
- /x
- and last PARSEDATE;
-
- # ISO 8601 format '1996-02-29 12:00:00 -0100' and variants
- ($yr, $mon, $day, $hr, $min, $sec, $tz) =
- /^\s*
- (\d{4}) # year
- [-\/]?
- (\d\d?) # numerical month
- [-\/]?
- (\d\d?) # day
- (?:
- (?:\s+|:|T|-) # separator before clock
- (\d\d?):?(\d\d) # hour:min
- (?::?(\d\d))? # optional seconds
- )? # optional clock
- \s*
- ([-+]?\d\d?:?(:?\d\d)?
- |Z|z)? # timezone (Z is "zero meridian", i.e. GMT)
- \s*$
- /x
- and last PARSEDATE;
-
- # Windows 'dir' 11-12-96 03:52PM
- ($mon, $day, $yr, $hr, $min, $aorp) =
- /^\s*
- (\d{2}) # numerical month
- -
- (\d{2}) # day
- -
- (\d{2}) # year
- \s+
- (\d\d?):(\d\d)([apAP][mM]) # hour:min AM or PM
- \s*$
- /x
- and last PARSEDATE;
-
- # If it is not recognized by now we give up
- return undef;
- }
-
- # Translate month name to number
- if ($mon =~ /^\d+$/) {
- # numeric month
- return undef if $mon < 1 || $mon > 12;
- $mon--;
- } else {
- $mon = lc $mon;
- return undef unless exists $MoY{$mon};
- $mon = $MoY{$mon};
- }
-
- # If the year is missing, we assume some date before the current,
- # because these date are mostly present on "ls -l" listings.
- unless (defined $yr) {
- $yr = $current_year;
- $yr-- if $mon > $current_month;
- }
-
- # Then we check if the year is acceptable
- return undef if $yr > 99 && $yr < 1900; # We ignore these years
- $yr += 100 if $yr < 50; # a stupid thing to do???
- $yr -= 1900 if $yr >= 1900;
- # The $yr is now relative to 1900 (as expected by timelocal())
-
- # timelocal() seems to go into an infinite loop if it is given out
- # of range parameters. Let's check the year at least.
-
- # Epoch counter maxes out in year 2038, assuming "time_t" is 32 bit
- return undef if $yr > 138;
- return undef if $yr < 70; # 1970 is Unix epoch
-
- # Compensate for AM/PM
- if ($aorp) {
- $aorp = uc $aorp;
- $hr = 0 if $hr == 12 && $aorp eq 'AM';
- $hr += 12 if $aorp eq 'PM' && $hr != 12;
- }
-
- # Make sure things are defined
- for ($sec, $min, $hr) { $_ = 0 unless defined }
-
- # Should we compensate for the timezone?
- $tz = $default_zone unless defined $tz;
- return eval {Time::Local::timelocal($sec, $min, $hr, $day, $mon, $yr)}
- unless defined $tz;
-
- # We can calculate offset for numerical time zones
- if ($tz =~ /^([-+])?(\d\d?):?(\d\d)?$/) {
- $offset = 3600 * $2;
- $offset += 60 * $3 if $3;
- $offset *= -1 if $1 && $1 ne '-';
- }
- eval{Time::Local::timegm($sec, $min, $hr, $day, $mon, $yr) + $offset};
- }
-
-
-
- # And then some bloat because I happen to like the ISO 8601 time
- # format.
-
- sub time2iso (;$)
- {
- my $time = shift;
- $time = time unless defined $time;
- my($sec,$min,$hour,$mday,$mon,$year) = localtime($time);
- sprintf("%04d-%02d-%02d %02d:%02d:%02d",
- $year+1900, $mon+1, $mday, $hour, $min, $sec);
- }
-
-
- sub time2isoz (;$)
- {
- my $time = shift;
- $time = time unless defined $time;
- my($sec,$min,$hour,$mday,$mon,$year) = gmtime($time);
- sprintf("%04d-%02d-%02d %02d:%02d:%02dZ",
- $year+1900, $mon+1, $mday, $hour, $min, $sec);
- }
-
- 1;
-