725 lines
24 KiB
Ruby
725 lines
24 KiB
Ruby
# frozen_string_literal: true
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# shareable_constant_value: literal
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require 'date'
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# :stopdoc:
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# = time.rb
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#
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# When 'time' is required, Time is extended with additional methods for parsing
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# and converting Times.
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#
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# == Features
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#
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# This library extends the Time class with the following conversions between
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# date strings and Time objects:
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#
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# * date-time defined by {RFC 2822}[http://www.ietf.org/rfc/rfc2822.txt]
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# * HTTP-date defined by {RFC 2616}[http://www.ietf.org/rfc/rfc2616.txt]
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# * dateTime defined by XML Schema Part 2: Datatypes ({ISO
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# 8601}[http://www.iso.org/iso/date_and_time_format])
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# * various formats handled by Date._parse
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# * custom formats handled by Date._strptime
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# :startdoc:
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class Time
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class << Time
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#
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# A hash of timezones mapped to hour differences from UTC. The
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# set of time zones corresponds to the ones specified by RFC 2822
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# and ISO 8601.
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#
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ZoneOffset = { # :nodoc:
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'UTC' => 0,
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# ISO 8601
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'Z' => 0,
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# RFC 822
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'UT' => 0, 'GMT' => 0,
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'EST' => -5, 'EDT' => -4,
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'CST' => -6, 'CDT' => -5,
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'MST' => -7, 'MDT' => -6,
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'PST' => -8, 'PDT' => -7,
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# Following definition of military zones is original one.
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# See RFC 1123 and RFC 2822 for the error in RFC 822.
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'A' => +1, 'B' => +2, 'C' => +3, 'D' => +4, 'E' => +5, 'F' => +6,
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'G' => +7, 'H' => +8, 'I' => +9, 'K' => +10, 'L' => +11, 'M' => +12,
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'N' => -1, 'O' => -2, 'P' => -3, 'Q' => -4, 'R' => -5, 'S' => -6,
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'T' => -7, 'U' => -8, 'V' => -9, 'W' => -10, 'X' => -11, 'Y' => -12,
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}
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#
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# Return the number of seconds the specified time zone differs
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# from UTC.
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#
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# Numeric time zones that include minutes, such as
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# <code>-10:00</code> or <code>+1330</code> will work, as will
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# simpler hour-only time zones like <code>-10</code> or
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# <code>+13</code>.
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#
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# Textual time zones listed in ZoneOffset are also supported.
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#
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# If the time zone does not match any of the above, +zone_offset+
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# will check if the local time zone (both with and without
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# potential Daylight Saving \Time changes being in effect) matches
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# +zone+. Specifying a value for +year+ will change the year used
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# to find the local time zone.
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#
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# If +zone_offset+ is unable to determine the offset, nil will be
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# returned.
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#
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# require 'time'
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#
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# Time.zone_offset("EST") #=> -18000
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#
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# You must require 'time' to use this method.
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#
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def zone_offset(zone, year=self.now.year)
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off = nil
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zone = zone.upcase
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if /\A([+-])(\d\d)(:?)(\d\d)(?:\3(\d\d))?\z/ =~ zone
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off = ($1 == '-' ? -1 : 1) * (($2.to_i * 60 + $4.to_i) * 60 + $5.to_i)
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elsif zone.match?(/\A[+-]\d\d\z/)
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off = zone.to_i * 3600
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elsif ZoneOffset.include?(zone)
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off = ZoneOffset[zone] * 3600
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elsif ((t = self.local(year, 1, 1)).zone.upcase == zone rescue false)
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off = t.utc_offset
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elsif ((t = self.local(year, 7, 1)).zone.upcase == zone rescue false)
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off = t.utc_offset
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end
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off
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end
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# :stopdoc:
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def zone_utc?(zone)
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# * +0000
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# In RFC 2822, +0000 indicate a time zone at Universal Time.
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# Europe/Lisbon is "a time zone at Universal Time" in Winter.
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# Atlantic/Reykjavik is "a time zone at Universal Time".
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# Africa/Dakar is "a time zone at Universal Time".
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# So +0000 is a local time such as Europe/London, etc.
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# * GMT
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# GMT is used as a time zone abbreviation in Europe/London,
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# Africa/Dakar, etc.
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# So it is a local time.
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#
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# * -0000, -00:00
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# In RFC 2822, -0000 the date-time contains no information about the
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# local time zone.
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# In RFC 3339, -00:00 is used for the time in UTC is known,
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# but the offset to local time is unknown.
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# They are not appropriate for specific time zone such as
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# Europe/London because time zone neutral,
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# So -00:00 and -0000 are treated as UTC.
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zone.match?(/\A(?:-00:00|-0000|-00|UTC|Z|UT)\z/i)
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end
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private :zone_utc?
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def force_zone!(t, zone, offset=nil)
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if zone_utc?(zone)
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t.utc
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elsif offset ||= zone_offset(zone)
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# Prefer the local timezone over the fixed offset timezone because
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# the former is a real timezone and latter is an artificial timezone.
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t.localtime
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if t.utc_offset != offset
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# Use the fixed offset timezone only if the local timezone cannot
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# represent the given offset.
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t.localtime(offset)
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end
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else
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t.localtime
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end
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end
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private :force_zone!
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LeapYearMonthDays = [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31] # :nodoc:
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CommonYearMonthDays = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31] # :nodoc:
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def month_days(y, m)
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if ((y % 4 == 0) && (y % 100 != 0)) || (y % 400 == 0)
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LeapYearMonthDays[m-1]
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else
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CommonYearMonthDays[m-1]
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end
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end
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private :month_days
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def apply_offset(year, mon, day, hour, min, sec, off)
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if off < 0
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off = -off
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off, o = off.divmod(60)
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if o != 0 then sec += o; o, sec = sec.divmod(60); off += o end
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off, o = off.divmod(60)
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if o != 0 then min += o; o, min = min.divmod(60); off += o end
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off, o = off.divmod(24)
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if o != 0 then hour += o; o, hour = hour.divmod(24); off += o end
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if off != 0
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day += off
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days = month_days(year, mon)
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if days and days < day
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mon += 1
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if 12 < mon
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mon = 1
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year += 1
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end
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day = 1
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end
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end
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elsif 0 < off
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off, o = off.divmod(60)
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if o != 0 then sec -= o; o, sec = sec.divmod(60); off -= o end
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off, o = off.divmod(60)
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if o != 0 then min -= o; o, min = min.divmod(60); off -= o end
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off, o = off.divmod(24)
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if o != 0 then hour -= o; o, hour = hour.divmod(24); off -= o end
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if off != 0 then
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day -= off
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if day < 1
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mon -= 1
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if mon < 1
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year -= 1
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mon = 12
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end
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day = month_days(year, mon)
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end
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end
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end
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return year, mon, day, hour, min, sec
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end
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private :apply_offset
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def make_time(date, year, yday, mon, day, hour, min, sec, sec_fraction, zone, now)
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if !year && !yday && !mon && !day && !hour && !min && !sec && !sec_fraction
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raise ArgumentError, "no time information in #{date.inspect}"
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end
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off = nil
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if year || now
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off_year = year || now.year
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off = zone_offset(zone, off_year) if zone
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end
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if yday
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unless (1..366) === yday
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raise ArgumentError, "yday #{yday} out of range"
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end
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mon, day = (yday-1).divmod(31)
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mon += 1
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day += 1
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t = make_time(date, year, nil, mon, day, hour, min, sec, sec_fraction, zone, now)
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diff = yday - t.yday
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return t if diff.zero?
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day += diff
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if day > 28 and day > (mday = month_days(off_year, mon))
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if (mon += 1) > 12
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raise ArgumentError, "yday #{yday} out of range"
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end
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day -= mday
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end
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return make_time(date, year, nil, mon, day, hour, min, sec, sec_fraction, zone, now)
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end
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if now and now.respond_to?(:getlocal)
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if off
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now = now.getlocal(off) if now.utc_offset != off
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else
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now = now.getlocal
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end
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end
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usec = nil
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usec = sec_fraction * 1000000 if sec_fraction
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if now
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begin
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break if year; year = now.year
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break if mon; mon = now.mon
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break if day; day = now.day
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break if hour; hour = now.hour
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break if min; min = now.min
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break if sec; sec = now.sec
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break if sec_fraction; usec = now.tv_usec
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end until true
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end
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year ||= 1970
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mon ||= 1
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day ||= 1
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hour ||= 0
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min ||= 0
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sec ||= 0
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usec ||= 0
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if year != off_year
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off = nil
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off = zone_offset(zone, year) if zone
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end
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if off
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year, mon, day, hour, min, sec =
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apply_offset(year, mon, day, hour, min, sec, off)
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t = self.utc(year, mon, day, hour, min, sec, usec)
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force_zone!(t, zone, off)
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t
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else
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self.local(year, mon, day, hour, min, sec, usec)
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end
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end
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private :make_time
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# :startdoc:
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#
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# Takes a string representation of a Time and attempts to parse it
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# using a heuristic.
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#
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# This method **does not** function as a validator. If the input
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# string does not match valid formats strictly, you may get a
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# cryptic result. Should consider to use `Time.strptime` instead
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# of this method as possible.
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#
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# require 'time'
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#
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# Time.parse("2010-10-31") #=> 2010-10-31 00:00:00 -0500
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#
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# Any missing pieces of the date are inferred based on the current date.
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#
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# require 'time'
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#
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# # assuming the current date is "2011-10-31"
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# Time.parse("12:00") #=> 2011-10-31 12:00:00 -0500
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#
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# We can change the date used to infer our missing elements by passing a second
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# object that responds to #mon, #day and #year, such as Date, Time or DateTime.
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# We can also use our own object.
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#
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# require 'time'
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#
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# class MyDate
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# attr_reader :mon, :day, :year
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#
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# def initialize(mon, day, year)
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# @mon, @day, @year = mon, day, year
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# end
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# end
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#
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# d = Date.parse("2010-10-28")
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# t = Time.parse("2010-10-29")
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# dt = DateTime.parse("2010-10-30")
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# md = MyDate.new(10,31,2010)
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#
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# Time.parse("12:00", d) #=> 2010-10-28 12:00:00 -0500
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# Time.parse("12:00", t) #=> 2010-10-29 12:00:00 -0500
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# Time.parse("12:00", dt) #=> 2010-10-30 12:00:00 -0500
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# Time.parse("12:00", md) #=> 2010-10-31 12:00:00 -0500
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#
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# If a block is given, the year described in +date+ is converted
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# by the block. This is specifically designed for handling two
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# digit years. For example, if you wanted to treat all two digit
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# years prior to 70 as the year 2000+ you could write this:
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#
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# require 'time'
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#
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# Time.parse("01-10-31") {|year| year + (year < 70 ? 2000 : 1900)}
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# #=> 2001-10-31 00:00:00 -0500
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# Time.parse("70-10-31") {|year| year + (year < 70 ? 2000 : 1900)}
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# #=> 1970-10-31 00:00:00 -0500
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#
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# If the upper components of the given time are broken or missing, they are
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# supplied with those of +now+. For the lower components, the minimum
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# values (1 or 0) are assumed if broken or missing. For example:
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#
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# require 'time'
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#
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# # Suppose it is "Thu Nov 29 14:33:20 2001" now and
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# # your time zone is EST which is GMT-5.
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# now = Time.parse("Thu Nov 29 14:33:20 2001")
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# Time.parse("16:30", now) #=> 2001-11-29 16:30:00 -0500
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# Time.parse("7/23", now) #=> 2001-07-23 00:00:00 -0500
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# Time.parse("Aug 31", now) #=> 2001-08-31 00:00:00 -0500
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# Time.parse("Aug 2000", now) #=> 2000-08-01 00:00:00 -0500
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#
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# Since there are numerous conflicts among locally defined time zone
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# abbreviations all over the world, this method is not intended to
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# understand all of them. For example, the abbreviation "CST" is
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# used variously as:
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#
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# -06:00 in America/Chicago,
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# -05:00 in America/Havana,
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# +08:00 in Asia/Harbin,
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# +09:30 in Australia/Darwin,
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# +10:30 in Australia/Adelaide,
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# etc.
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#
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# Based on this fact, this method only understands the time zone
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# abbreviations described in RFC 822 and the system time zone, in the
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# order named. (i.e. a definition in RFC 822 overrides the system
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# time zone definition.) The system time zone is taken from
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# <tt>Time.local(year, 1, 1).zone</tt> and
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# <tt>Time.local(year, 7, 1).zone</tt>.
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# If the extracted time zone abbreviation does not match any of them,
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# it is ignored and the given time is regarded as a local time.
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#
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# ArgumentError is raised if Date._parse cannot extract information from
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# +date+ or if the Time class cannot represent specified date.
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#
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# This method can be used as a fail-safe for other parsing methods as:
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#
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# Time.rfc2822(date) rescue Time.parse(date)
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# Time.httpdate(date) rescue Time.parse(date)
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# Time.xmlschema(date) rescue Time.parse(date)
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#
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# A failure of Time.parse should be checked, though.
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#
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# You must require 'time' to use this method.
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#
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def parse(date, now=self.now)
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comp = !block_given?
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d = Date._parse(date, comp)
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year = d[:year]
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year = yield(year) if year && !comp
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make_time(date, year, d[:yday], d[:mon], d[:mday], d[:hour], d[:min], d[:sec], d[:sec_fraction], d[:zone], now)
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end
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#
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# Works similar to +parse+ except that instead of using a
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# heuristic to detect the format of the input string, you provide
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# a second argument that describes the format of the string.
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#
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# If a block is given, the year described in +date+ is converted by the
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# block. For example:
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#
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# Time.strptime(...) {|y| y < 100 ? (y >= 69 ? y + 1900 : y + 2000) : y}
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#
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# Below is a list of the formatting options:
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#
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# %a :: The abbreviated weekday name ("Sun")
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# %A :: The full weekday name ("Sunday")
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# %b :: The abbreviated month name ("Jan")
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# %B :: The full month name ("January")
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# %c :: The preferred local date and time representation
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# %C :: Century (20 in 2009)
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# %d :: Day of the month (01..31)
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# %D :: Date (%m/%d/%y)
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# %e :: Day of the month, blank-padded ( 1..31)
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# %F :: Equivalent to %Y-%m-%d (the ISO 8601 date format)
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# %g :: The last two digits of the commercial year
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# %G :: The week-based year according to ISO-8601 (week 1 starts on Monday
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# and includes January 4)
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# %h :: Equivalent to %b
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# %H :: Hour of the day, 24-hour clock (00..23)
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# %I :: Hour of the day, 12-hour clock (01..12)
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# %j :: Day of the year (001..366)
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# %k :: hour, 24-hour clock, blank-padded ( 0..23)
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# %l :: hour, 12-hour clock, blank-padded ( 0..12)
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# %L :: Millisecond of the second (000..999)
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# %m :: Month of the year (01..12)
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# %M :: Minute of the hour (00..59)
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# %n :: Newline (\n)
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# %N :: Fractional seconds digits
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# %p :: Meridian indicator ("AM" or "PM")
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# %P :: Meridian indicator ("am" or "pm")
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# %r :: time, 12-hour (same as %I:%M:%S %p)
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# %R :: time, 24-hour (%H:%M)
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# %s :: Number of seconds since 1970-01-01 00:00:00 UTC.
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# %S :: Second of the minute (00..60)
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# %t :: Tab character (\t)
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# %T :: time, 24-hour (%H:%M:%S)
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# %u :: Day of the week as a decimal, Monday being 1. (1..7)
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# %U :: Week number of the current year, starting with the first Sunday as
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# the first day of the first week (00..53)
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# %v :: VMS date (%e-%b-%Y)
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# %V :: Week number of year according to ISO 8601 (01..53)
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# %W :: Week number of the current year, starting with the first Monday
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# as the first day of the first week (00..53)
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# %w :: Day of the week (Sunday is 0, 0..6)
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# %x :: Preferred representation for the date alone, no time
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# %X :: Preferred representation for the time alone, no date
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# %y :: Year without a century (00..99)
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# %Y :: Year which may include century, if provided
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# %z :: Time zone as hour offset from UTC (e.g. +0900)
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# %Z :: Time zone name
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# %% :: Literal "%" character
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# %+ :: date(1) (%a %b %e %H:%M:%S %Z %Y)
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#
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# require 'time'
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#
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# Time.strptime("2000-10-31", "%Y-%m-%d") #=> 2000-10-31 00:00:00 -0500
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#
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# You must require 'time' to use this method.
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#
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def strptime(date, format, now=self.now)
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d = Date._strptime(date, format)
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raise ArgumentError, "invalid date or strptime format - `#{date}' `#{format}'" unless d
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if seconds = d[:seconds]
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|
if sec_fraction = d[:sec_fraction]
|
|
usec = sec_fraction * 1000000
|
|
usec *= -1 if seconds < 0
|
|
else
|
|
usec = 0
|
|
end
|
|
t = Time.at(seconds, usec)
|
|
if zone = d[:zone]
|
|
force_zone!(t, zone)
|
|
end
|
|
else
|
|
year = d[:year]
|
|
year = yield(year) if year && block_given?
|
|
yday = d[:yday]
|
|
if (d[:cwyear] && !year) || ((d[:cwday] || d[:cweek]) && !(d[:mon] && d[:mday]))
|
|
# make_time doesn't deal with cwyear/cwday/cweek
|
|
return Date.strptime(date, format).to_time
|
|
end
|
|
if (d[:wnum0] || d[:wnum1]) && !yday && !(d[:mon] && d[:mday])
|
|
yday = Date.strptime(date, format).yday
|
|
end
|
|
t = make_time(date, year, yday, d[:mon], d[:mday], d[:hour], d[:min], d[:sec], d[:sec_fraction], d[:zone], now)
|
|
end
|
|
t
|
|
end
|
|
|
|
MonthValue = { # :nodoc:
|
|
'JAN' => 1, 'FEB' => 2, 'MAR' => 3, 'APR' => 4, 'MAY' => 5, 'JUN' => 6,
|
|
'JUL' => 7, 'AUG' => 8, 'SEP' => 9, 'OCT' =>10, 'NOV' =>11, 'DEC' =>12
|
|
}
|
|
|
|
#
|
|
# Parses +date+ as date-time defined by RFC 2822 and converts it to a Time
|
|
# object. The format is identical to the date format defined by RFC 822 and
|
|
# updated by RFC 1123.
|
|
#
|
|
# ArgumentError is raised if +date+ is not compliant with RFC 2822
|
|
# or if the Time class cannot represent specified date.
|
|
#
|
|
# See #rfc2822 for more information on this format.
|
|
#
|
|
# require 'time'
|
|
#
|
|
# Time.rfc2822("Wed, 05 Oct 2011 22:26:12 -0400")
|
|
# #=> 2010-10-05 22:26:12 -0400
|
|
#
|
|
# You must require 'time' to use this method.
|
|
#
|
|
def rfc2822(date)
|
|
if /\A\s*
|
|
(?:(?:Mon|Tue|Wed|Thu|Fri|Sat|Sun)\s*,\s*)?
|
|
(\d{1,2})\s+
|
|
(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s+
|
|
(\d{2,})\s+
|
|
(\d{2})\s*
|
|
:\s*(\d{2})\s*
|
|
(?::\s*(\d{2}))?\s+
|
|
([+-]\d{4}|
|
|
UT|GMT|EST|EDT|CST|CDT|MST|MDT|PST|PDT|[A-IK-Z])/ix =~ date
|
|
# Since RFC 2822 permit comments, the regexp has no right anchor.
|
|
day = $1.to_i
|
|
mon = MonthValue[$2.upcase]
|
|
year = $3.to_i
|
|
short_year_p = $3.length <= 3
|
|
hour = $4.to_i
|
|
min = $5.to_i
|
|
sec = $6 ? $6.to_i : 0
|
|
zone = $7
|
|
|
|
if short_year_p
|
|
# following year completion is compliant with RFC 2822.
|
|
year = if year < 50
|
|
2000 + year
|
|
else
|
|
1900 + year
|
|
end
|
|
end
|
|
|
|
off = zone_offset(zone)
|
|
year, mon, day, hour, min, sec =
|
|
apply_offset(year, mon, day, hour, min, sec, off)
|
|
t = self.utc(year, mon, day, hour, min, sec)
|
|
force_zone!(t, zone, off)
|
|
t
|
|
else
|
|
raise ArgumentError.new("not RFC 2822 compliant date: #{date.inspect}")
|
|
end
|
|
end
|
|
alias rfc822 rfc2822
|
|
|
|
#
|
|
# Parses +date+ as an HTTP-date defined by RFC 2616 and converts it to a
|
|
# Time object.
|
|
#
|
|
# ArgumentError is raised if +date+ is not compliant with RFC 2616 or if
|
|
# the Time class cannot represent specified date.
|
|
#
|
|
# See #httpdate for more information on this format.
|
|
#
|
|
# require 'time'
|
|
#
|
|
# Time.httpdate("Thu, 06 Oct 2011 02:26:12 GMT")
|
|
# #=> 2011-10-06 02:26:12 UTC
|
|
#
|
|
# You must require 'time' to use this method.
|
|
#
|
|
def httpdate(date)
|
|
if date.match?(/\A\s*
|
|
(?:Mon|Tue|Wed|Thu|Fri|Sat|Sun),\x20
|
|
(\d{2})\x20
|
|
(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\x20
|
|
(\d{4})\x20
|
|
(\d{2}):(\d{2}):(\d{2})\x20
|
|
GMT
|
|
\s*\z/ix)
|
|
self.rfc2822(date).utc
|
|
elsif /\A\s*
|
|
(?:Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday),\x20
|
|
(\d\d)-(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)-(\d\d)\x20
|
|
(\d\d):(\d\d):(\d\d)\x20
|
|
GMT
|
|
\s*\z/ix =~ date
|
|
year = $3.to_i
|
|
if year < 50
|
|
year += 2000
|
|
else
|
|
year += 1900
|
|
end
|
|
self.utc(year, $2, $1.to_i, $4.to_i, $5.to_i, $6.to_i)
|
|
elsif /\A\s*
|
|
(?:Mon|Tue|Wed|Thu|Fri|Sat|Sun)\x20
|
|
(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\x20
|
|
(\d\d|\x20\d)\x20
|
|
(\d\d):(\d\d):(\d\d)\x20
|
|
(\d{4})
|
|
\s*\z/ix =~ date
|
|
self.utc($6.to_i, MonthValue[$1.upcase], $2.to_i,
|
|
$3.to_i, $4.to_i, $5.to_i)
|
|
else
|
|
raise ArgumentError.new("not RFC 2616 compliant date: #{date.inspect}")
|
|
end
|
|
end
|
|
|
|
#
|
|
# Parses +time+ as a dateTime defined by the XML Schema and converts it to
|
|
# a Time object. The format is a restricted version of the format defined
|
|
# by ISO 8601.
|
|
#
|
|
# ArgumentError is raised if +time+ is not compliant with the format or if
|
|
# the Time class cannot represent the specified time.
|
|
#
|
|
# See #xmlschema for more information on this format.
|
|
#
|
|
# require 'time'
|
|
#
|
|
# Time.xmlschema("2011-10-05T22:26:12-04:00")
|
|
# #=> 2011-10-05 22:26:12-04:00
|
|
#
|
|
# You must require 'time' to use this method.
|
|
#
|
|
def xmlschema(time)
|
|
if /\A\s*
|
|
(-?\d+)-(\d\d)-(\d\d)
|
|
T
|
|
(\d\d):(\d\d):(\d\d)
|
|
(\.\d+)?
|
|
(Z|[+-]\d\d(?::?\d\d)?)?
|
|
\s*\z/ix =~ time
|
|
year = $1.to_i
|
|
mon = $2.to_i
|
|
day = $3.to_i
|
|
hour = $4.to_i
|
|
min = $5.to_i
|
|
sec = $6.to_i
|
|
usec = 0
|
|
if $7
|
|
usec = Rational($7) * 1000000
|
|
end
|
|
if $8
|
|
zone = $8
|
|
off = zone_offset(zone)
|
|
year, mon, day, hour, min, sec =
|
|
apply_offset(year, mon, day, hour, min, sec, off)
|
|
t = self.utc(year, mon, day, hour, min, sec, usec)
|
|
force_zone!(t, zone, off)
|
|
t
|
|
else
|
|
self.local(year, mon, day, hour, min, sec, usec)
|
|
end
|
|
else
|
|
raise ArgumentError.new("invalid xmlschema format: #{time.inspect}")
|
|
end
|
|
end
|
|
alias iso8601 xmlschema
|
|
end # class << self
|
|
|
|
#
|
|
# Returns a string which represents the time as date-time defined by RFC 2822:
|
|
#
|
|
# day-of-week, DD month-name CCYY hh:mm:ss zone
|
|
#
|
|
# where zone is [+-]hhmm.
|
|
#
|
|
# If +self+ is a UTC time, -0000 is used as zone.
|
|
#
|
|
# require 'time'
|
|
#
|
|
# t = Time.now
|
|
# t.rfc2822 # => "Wed, 05 Oct 2011 22:26:12 -0400"
|
|
#
|
|
# You must require 'time' to use this method.
|
|
#
|
|
def rfc2822
|
|
strftime('%a, %d %b %Y %T ') << (utc? ? '-0000' : strftime('%z'))
|
|
end
|
|
alias rfc822 rfc2822
|
|
|
|
#
|
|
# Returns a string which represents the time as RFC 1123 date of HTTP-date
|
|
# defined by RFC 2616:
|
|
#
|
|
# day-of-week, DD month-name CCYY hh:mm:ss GMT
|
|
#
|
|
# Note that the result is always UTC (GMT).
|
|
#
|
|
# require 'time'
|
|
#
|
|
# t = Time.now
|
|
# t.httpdate # => "Thu, 06 Oct 2011 02:26:12 GMT"
|
|
#
|
|
# You must require 'time' to use this method.
|
|
#
|
|
def httpdate
|
|
getutc.strftime('%a, %d %b %Y %T GMT')
|
|
end
|
|
|
|
#
|
|
# Returns a string which represents the time as a dateTime defined by XML
|
|
# Schema:
|
|
#
|
|
# CCYY-MM-DDThh:mm:ssTZD
|
|
# CCYY-MM-DDThh:mm:ss.sssTZD
|
|
#
|
|
# where TZD is Z or [+-]hh:mm.
|
|
#
|
|
# If self is a UTC time, Z is used as TZD. [+-]hh:mm is used otherwise.
|
|
#
|
|
# +fraction_digits+ specifies a number of digits to use for fractional
|
|
# seconds. Its default value is 0.
|
|
#
|
|
# require 'time'
|
|
#
|
|
# t = Time.now
|
|
# t.iso8601 # => "2011-10-05T22:26:12-04:00"
|
|
#
|
|
# You must require 'time' to use this method.
|
|
#
|
|
def xmlschema(fraction_digits=0)
|
|
fraction_digits = fraction_digits.to_i
|
|
s = strftime("%FT%T")
|
|
if fraction_digits > 0
|
|
s << strftime(".%#{fraction_digits}N")
|
|
end
|
|
s << (utc? ? 'Z' : strftime("%:z"))
|
|
end
|
|
alias iso8601 xmlschema
|
|
end
|
|
|