1HTTP::Date(3) User Contributed Perl Documentation HTTP::Date(3)
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6 HTTP::Date - date conversion routines
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9 use HTTP::Date;
10 $string = time2str($time); # Format as GMT ASCII time
12 $time = str2time($string); # convert ASCII date to machine time
13
15 This module provides functions that deal the date formats used by the
16 HTTP protocol (and then some more). Only the first two functions,
17 time2str() and str2time(), are exported by default.
18 time2str( [$time] )
20 The time2str() function converts a machine time (seconds since
21 epoch) to a string. If the function is called without an argument
22 or with an undefined argument, it will use the current time.
23 The string returned is in the format preferred for the HTTP
25 protocol. This is a fixed length subset of the format defined by
26 RFC 1123, represented in Universal Time (GMT). An example of a
27 time stamp in this format is:
28 Sun, 06 Nov 1994 08:49:37 GMT
30 str2time( $str [, $zone] )
32 The str2time() function converts a string to machine time. It
33 returns "undef" if the format of $str is unrecognized, otherwise
34 whatever the "Time::Local" functions can make out of the parsed
35 time. Dates before the system's epoch may not work on all
36 operating systems. The time formats recognized are the same as for
37 parse_date().
38 The function also takes an optional second argument that specifies
40 the default time zone to use when converting the date. This
41 parameter is ignored if the zone is found in the date string
42 itself. If this parameter is missing, and the date string format
43 does not contain any zone specification, then the local time zone
44 is assumed.
45 If the zone is not ""GMT"" or numerical (like ""-0800"" or
47 "+0100"), then the "Time::Zone" module must be installed in order
48 to get the date recognized.
49 parse_date( $str )
51 This function will try to parse a date string, and then return it
52 as a list of numerical values followed by a (possible undefined)
53 time zone specifier; ($year, $month, $day, $hour, $min, $sec, $tz).
54 The $year returned will not have the number 1900 subtracted from it
55 and the $month numbers start with 1.
56 In scalar context the numbers are interpolated in a string of the
58 "YYYY-MM-DD hh:mm:ss TZ"-format and returned.
59 If the date is unrecognized, then the empty list is returned.
61 The function is able to parse the following formats:
63 "Wed, 09 Feb 1994 22:23:32 GMT" -- HTTP format
65 "Thu Feb 3 17:03:55 GMT 1994" -- ctime(3) format
66 "Thu Feb 3 00:00:00 1994", -- ANSI C asctime() format
67 "Tuesday, 08-Feb-94 14:15:29 GMT" -- old rfc850 HTTP format
68 "Tuesday, 08-Feb-1994 14:15:29 GMT" -- broken rfc850 HTTP format
69 "03/Feb/1994:17:03:55 -0700" -- common logfile format
71 "09 Feb 1994 22:23:32 GMT" -- HTTP format (no weekday)
72 "08-Feb-94 14:15:29 GMT" -- rfc850 format (no weekday)
73 "08-Feb-1994 14:15:29 GMT" -- broken rfc850 format (no weekday)
74 "1994-02-03 14:15:29 -0100" -- ISO 8601 format
76 "1994-02-03 14:15:29" -- zone is optional
77 "1994-02-03" -- only date
78 "1994-02-03T14:15:29" -- Use T as separator
79 "19940203T141529Z" -- ISO 8601 compact format
80 "19940203" -- only date
81 "08-Feb-94" -- old rfc850 HTTP format (no weekday, no time)
83 "08-Feb-1994" -- broken rfc850 HTTP format (no weekday, no time)
84 "09 Feb 1994" -- proposed new HTTP format (no weekday, no time)
85 "03/Feb/1994" -- common logfile format (no time, no offset)
86 "Feb 3 1994" -- Unix 'ls -l' format
88 "Feb 3 17:03" -- Unix 'ls -l' format
89 "11-15-96 03:52PM" -- Windows 'dir' format
91 The parser ignores leading and trailing whitespace. It also allow
93 the seconds to be missing and the month to be numerical in most
94 formats.
95 If the year is missing, then we assume that the date is the first
97 matching date before current month. If the year is given with only
98 2 digits, then parse_date() will select the century that makes the
99 year closest to the current date.
100 time2iso( [$time] )
102 Same as time2str(), but returns a "YYYY-MM-DD hh:mm:ss"-formatted
103 string representing time in the local time zone.
104 time2isoz( [$time] )
106 Same as time2str(), but returns a "YYYY-MM-DD hh:mm:ssZ"-formatted
107 string representing Universal Time.
108
110 "time" in perlfunc, Time::Zone
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113 Copyright 1995-1999, Gisle Aas
114 This library is free software; you can redistribute it and/or modify it
116 under the same terms as Perl itself.
117perl v5.10.1 2009-10-03 HTTP::Date(3)