Object
Implements the extensions to the Time class that are described in the documentation for the time.rb library.
Parses date as 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 Time class cannot represent specified date.
See httpdate for more information on this format.
time library should be required to use this method as follows.
require 'time'
# File time.rb, line 357
def httpdate(date)
if /\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/x =~ date
self.rfc2822(date)
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/x =~ 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/x =~ 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 date using Date._parse and converts it to a Time object.
If a block is given, the year described in date is converted by the block. For example:
Time.parse(...) {|y| 0 <= y && y < 100 ? (y >= 69 ? y + 1900 : y + 2000) : y}
If the upper components of the given time are broken or missing, they are supplied with those of now. For the lower components, the minimum values (1 or 0) are assumed if broken or missing. For example:
# Suppose it is "Thu Nov 29 14:33:20 GMT 2001" now and # your timezone is GMT: now = Time.parse("Thu Nov 29 14:33:20 GMT 2001") Time.parse("16:30", now) #=> 2001-11-29 16:30:00 +0900 Time.parse("7/23", now) #=> 2001-07-23 00:00:00 +0900 Time.parse("Aug 31", now) #=> 2001-08-31 00:00:00 +0900 Time.parse("Aug 2000", now) #=> 2000-08-01 00:00:00 +0900
Since there are numerous conflicts among locally defined timezone abbreviations all over the world, this method is not made to understand all of them. For example, the abbreviation “CST” is used variously as:
-06:00 in America/Chicago, -05:00 in America/Havana, +08:00 in Asia/Harbin, +09:30 in Australia/Darwin, +10:30 in Australia/Adelaide, etc.
Based on the fact, this method only understands the timezone abbreviations described in RFC 822 and the system timezone, in the order named. (i.e. a definition in RFC 822 overrides the system timezone definition.) The system timezone is taken from Time.local(year, 1, 1).zone and Time.local(year, 7, 1).zone. If the extracted timezone abbreviation does not match any of them, it is ignored and the given time is regarded as a local time.
ArgumentError is raised if Date._parse cannot extract information from date or Time class cannot represent specified date.
This method can be used as fail-safe for other parsing methods as:
Time.rfc2822(date) rescue Time.parse(date) Time.httpdate(date) rescue Time.parse(date) Time.xmlschema(date) rescue Time.parse(date)
A failure for Time.parse should be checked, though.
time library should be required to use this method as follows.
require 'time'
# File time.rb, line 259
def parse(date, now=self.now)
comp = !block_given?
d = Date._parse(date, comp)
if !d[:year] && !d[:mon] && !d[:mday] && !d[:hour] && !d[:min] && !d[:sec] && !d[:sec_fraction]
raise ArgumentError, "no time information in #{date.inspect}"
end
year = d[:year]
year = yield(year) if year && !comp
make_time(year, d[:mon], d[:mday], d[:hour], d[:min], d[:sec], d[:sec_fraction], d[:zone], now)
end
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 Time class cannot represent specified date.
See rfc2822 for more information on this format.
time library should be required to use this method as follows.
require 'time'
# File time.rb, line 304
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])/x =~ date
# Since RFC 2822 permit comments, the regexp has no right anchor.
day = $1.to_i
mon = MonthValue[$2.upcase]
year = $3.to_i
hour = $4.to_i
min = $5.to_i
sec = $6 ? $6.to_i : 0
zone = $7
# following year completion is compliant with RFC 2822.
year = if year < 50
2000 + year
elsif year < 1000
1900 + year
else
year
end
year, mon, day, hour, min, sec =
apply_offset(year, mon, day, hour, min, sec, zone_offset(zone))
t = self.utc(year, mon, day, hour, min, sec)
t.localtime if !zone_utc?(zone)
t
else
raise ArgumentError.new("not RFC 2822 compliant date: #{date.inspect}")
end
end
Parses date using Date._strptime and converts it to a Time object.
If a block is given, the year described in date is converted by the block. For example:
Time.strptime(...) {|y| y < 100 ? (y >= 69 ? y + 1900 : y + 2000) : y}
# File time.rb, line 277
def strptime(date, format, now=self.now)
d = Date._strptime(date, format)
raise ArgumentError, "invalid strptime format - `#{format}'" unless d
year = d[:year]
year = yield(year) if year && block_given?
make_time(year, d[:mon], d[:mday], d[:hour], d[:min], d[:sec], d[:sec_fraction], d[:zone], now)
end
Parses date as dateTime defined by XML Schema and converts it to a Time object. The format is restricted version of the format defined by ISO 8601.
ArgumentError is raised if date is not compliant with the format or Time class cannot represent specified date.
See xmlschema for more information on this format.
time library should be required to use this method as follows.
require 'time'
# File time.rb, line 408
def xmlschema(date)
if /\A\s*
(-?\d+)-(\d\d)-(\d\d)
T
(\d\d):(\d\d):(\d\d)
(\.\d+)?
(Z|[+-]\d\d:\d\d)?
\s*\z/x =~ date
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
year, mon, day, hour, min, sec =
apply_offset(year, mon, day, hour, min, sec, zone_offset(zone))
self.utc(year, mon, day, hour, min, sec, usec)
else
self.local(year, mon, day, hour, min, sec, usec)
end
else
raise ArgumentError.new("invalid date: #{date.inspect}")
end
end
# File time.rb, line 65
def zone_offset(zone, year=self.now.year)
off = nil
zone = zone.upcase
if /\A([+-])(\d\d):?(\d\d)\z/ =~ zone
off = ($1 == '-' ? -1 : 1) * ($2.to_i * 60 + $3.to_i) * 60
elsif /\A[+-]\d\d\z/ =~ zone
off = zone.to_i * 3600
elsif ZoneOffset.include?(zone)
off = ZoneOffset[zone] * 3600
elsif ((t = self.local(year, 1, 1)).zone.upcase == zone rescue false)
off = t.utc_offset
elsif ((t = self.local(year, 7, 1)).zone.upcase == zone rescue false)
off = t.utc_offset
end
off
end
Returns a string which represents the time as rfc1123-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).
time library should be required to use this method as follows.
require 'time'
# File time.rb, line 489
def httpdate
t = dup.utc
sprintf('%s, %02d %s %0*d %02d:%02d:%02d GMT',
RFC2822_DAY_NAME[t.wday],
t.day, RFC2822_MONTH_NAME[t.mon-1], t.year < 0 ? 5 : 4, t.year,
t.hour, t.min, t.sec)
end
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.
time library should be required to use this method as follows.
require 'time'
# File time.rb, line 454
def rfc2822
sprintf('%s, %02d %s %0*d %02d:%02d:%02d ',
RFC2822_DAY_NAME[wday],
day, RFC2822_MONTH_NAME[mon-1], year < 0 ? 5 : 4, year,
hour, min, sec) +
if utc?
'-0000'
else
off = utc_offset
sign = off < 0 ? '-' : '+'
sprintf('%s%02d%02d', sign, *(off.abs / 60).divmod(60))
end
end
Returns a string which represents the time as 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.
fractional_seconds specifies a number of digits of fractional seconds. Its default value is 0.
time library should be required to use this method as follows.
require 'time'
# File time.rb, line 515
def xmlschema(fraction_digits=0)
sprintf('%0*d-%02d-%02dT%02d:%02d:%02d',
year < 0 ? 5 : 4, year, mon, day, hour, min, sec) +
if fraction_digits == 0
''
else
'.' + sprintf('%0*d', fraction_digits, (subsec * 10**fraction_digits).floor)
end +
if utc?
'Z'
else
off = utc_offset
sign = off < 0 ? '-' : '+'
sprintf('%s%02d:%02d', sign, *(off.abs / 60).divmod(60))
end
end