/
Date.pm
144 lines (96 loc) · 3.15 KB
/
Date.pm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
package Mojo::Date;
use Mojo::Base -base;
use overload
'bool' => sub {1},
'""' => sub { shift->to_string },
fallback => 1;
use Time::Local 'timegm';
has 'epoch';
# Days and months
my @DAYS = qw(Sun Mon Tue Wed Thu Fri Sat);
my @MONTHS = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
my %MONTHS;
@MONTHS{@MONTHS} = (0 .. 11);
sub new { shift->SUPER::new->parse(@_) }
sub parse {
my ($self, $date) = @_;
# Invalid
return $self unless defined $date;
# epoch (784111777)
return $self->epoch($date) if $date =~ /^\d+$/;
# RFC 822/1123 (Sun, 06 Nov 1994 08:49:37 GMT)
my ($day, $month, $year, $h, $m, $s);
if ($date =~ /^\w+\,\s+(\d+)\s+(\w+)\s+(\d+)\s+(\d+):(\d+):(\d+)\s+GMT$/) {
($day, $month, $year, $h, $m, $s) = ($1, $MONTHS{$2}, $3, $4, $5, $6);
}
# RFC 850/1036 (Sunday, 06-Nov-94 08:49:37 GMT)
elsif ($date =~ /^\w+\,\s+(\d+)-(\w+)-(\d+)\s+(\d+):(\d+):(\d+)\s+GMT$/) {
($day, $month, $year, $h, $m, $s) = ($1, $MONTHS{$2}, $3, $4, $5, $6);
}
# ANSI C asctime() (Sun Nov 6 08:49:37 1994)
elsif ($date =~ /^\w+\s+(\w+)\s+(\d+)\s+(\d+):(\d+):(\d+)\s+(\d+)$/) {
($month, $day, $h, $m, $s, $year) = ($MONTHS{$1}, $2, $3, $4, $5, $6);
}
# Invalid
else { return $self }
# Prevent crash
my $epoch;
$epoch = eval { timegm($s, $m, $h, $day, $month, $year) };
$self->epoch($epoch) if !$@ && $epoch >= 0;
return $self;
}
sub to_string {
my $self = shift;
# RFC 2616 (Sun, 06 Nov 1994 08:49:37 GMT)
my ($s, $m, $h, $mday, $month, $year, $wday) = gmtime($self->epoch // time);
return sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT", $DAYS[$wday], $mday,
$MONTHS[$month], $year + 1900, $h, $m, $s;
}
1;
=head1 NAME
Mojo::Date - HTTP date
=head1 SYNOPSIS
use Mojo::Date;
# Parse
my $date = Mojo::Date->new('Sun, 06 Nov 1994 08:49:37 GMT');
say $date->epoch;
# Build
my $date = Mojo::Date->new(time);
say "$date";
=head1 DESCRIPTION
L<Mojo::Date> implements HTTP date and time functions as described in RFC
2616.
Sun, 06 Nov 1994 08:49:37 GMT ; RFC 822, updated by RFC 1123
Sunday, 06-Nov-94 08:49:37 GMT ; RFC 850, obsoleted by RFC 1036
Sun Nov 6 08:49:37 1994 ; ANSI C's asctime() format
=head1 ATTRIBUTES
L<Mojo::Date> implements the following attributes.
=head2 C<epoch>
my $epoch = $date->epoch;
$date = $date->epoch(784111777);
Epoch seconds.
=head1 METHODS
L<Mojo::Date> inherits all methods from L<Mojo::Base> and implements the
following new ones.
=head2 C<new>
my $date = Mojo::Date->new;
my $date = Mojo::Date->new('Sun Nov 6 08:49:37 1994');
Construct a new L<Mojo::Date> object.
=head2 C<parse>
$date = $date->parse('Sun Nov 6 08:49:37 1994');
Parse date.
# Epoch
say Mojo::Date->new('784111777')->epoch;
# RFC 822/1123
say Mojo::Date->new('Sun, 06 Nov 1994 08:49:37 GMT')->epoch;
# RFC 850/1036
say Mojo::Date->new('Sunday, 06-Nov-94 08:49:37 GMT')->epoch;
# Ansi C asctime()
say Mojo::Date->new('Sun Nov 6 08:49:37 1994')->epoch;
=head2 C<to_string>
my $string = $date->to_string;
my $string = "$date";
Render date suitable for HTTP messages.
=head1 SEE ALSO
L<Mojolicious>, L<Mojolicious::Guides>, L<http://mojolicio.us>.
=cut