Current Path :
/
usr
/
lib64
/
python2.7
/
site-packages
/
mx
/
DateTime
/
Or
Select Your Path :
Upload File :
New :
File
Dir
//usr/lib64/python2.7/site-packages/mx/DateTime/ARPA.py
""" This module provides a set of constructors and routines to convert between DateTime[Delta] instances and ARPA representations of date and time. The format is specified by RFC822 + RFC1123. Note: Timezones are only interpreted by ParseDateTimeGMT(). All other constructors silently ignore the time zone information. Copyright (c) 1998-2000, Marc-Andre Lemburg; mailto:mal@lemburg.com Copyright (c) 2000-2011, eGenix.com Software GmbH; mailto:info@egenix.com See the documentation for further information on copyrights, or contact the author. All Rights Reserved. """ import DateTime,Timezone import re # Grammar: RFC822 + RFC1123 + depreciated RFC850 _litday = '(?P<litday>Mon|Tue|Wed|Thu|Fri|Sat|Sun)[a-z]*' _litmonth = '(?P<litmonth>Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)'\ '[a-z]*' _date = ('(?:(?P<day>\d?\d)(?: +' + _litmonth + ' +|-(?P<month>\d?\d)-)(?P<year>(?:\d\d)?\d\d))') _zone = Timezone.zone _time = ('(?:(?P<hour>\d\d):(?P<minute>\d\d)' '(?::(?P<second>\d\d))?(?: +'+_zone+')?)') # Timezone information is made optional because some mail apps # forget to add it (most of these seem to be spamming engines, btw). # It defaults to UTC. _arpadate = '(?:'+ _litday + ',? )? *' + _date _arpadatetime = '(?:'+ _litday + ',? )? *' + _date + ' +' + _time # We are not strict about the extra characters: some applications # add extra information to the date header field. Additional spaces # between the fields and extra characters in the literal day # and month fields are also silently ignored. arpadateRE = re.compile(_arpadate) arpadatetimeRE = re.compile(_arpadatetime) # Translation tables litdaytable = {'mon':0, 'tue':1, 'wed':2, 'thu':3, 'fri':4, 'sat':5, 'sun':6 } litmonthtable = {'jan':1, 'feb':2, 'mar':3, 'apr':4, 'may':5, 'jun':6, 'jul':7, 'aug':8, 'sep':9, 'oct':10, 'nov':11, 'dec':12 } _days = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'] _months = [None, 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec' ] def ParseDate(arpastring,parse_arpadate=arpadateRE.match): """ ParseDate(arpastring) Returns a DateTime instance reflecting the given ARPA date. Only the date part is parsed, any time part will be ignored. The instance's time is set to 0:00:00. """ s = arpastring.strip() date = parse_arpadate(s) if not date: raise ValueError,'wrong format' litday,day,litmonth,month,year = date.groups() if len(year) == 2: year = DateTime.add_century(int(year)) else: year = int(year) if litmonth: litmonth = litmonth.lower() try: month = litmonthtable[litmonth] except KeyError: raise ValueError,'wrong month format' else: month = int(month) day = int(day) # litday and timezone are ignored return DateTime.DateTime(year,month,day) def ParseDateTime(arpastring,parse_arpadatetime=arpadatetimeRE.match): """ ParseDateTime(arpastring) Returns a DateTime instance reflecting the given ARPA date assuming it is local time (timezones are silently ignored). """ s = arpastring.strip() date = parse_arpadatetime(s) if not date: raise ValueError,'wrong format or unknown time zone' litday,day,litmonth,month,year,hour,minute,second,zone = date.groups() if len(year) == 2: year = DateTime.add_century(int(year)) else: year = int(year) if litmonth: litmonth = litmonth.lower() try: month = litmonthtable[litmonth] except KeyError: raise ValueError,'wrong month format' else: month = int(month) day = int(day) hour = int(hour) minute = int(minute) if second is None: second = 0.0 else: second = float(second) # litday and timezone are ignored return DateTime.DateTime(year,month,day,hour,minute,second) def ParseDateTimeGMT(arpastring,parse_arpadatetime=arpadatetimeRE.match): """ ParseDateTimeGMT(arpastring) Returns a DateTime instance reflecting the given ARPA date converting it to UTC (timezones are honored). """ s = arpastring.strip() date = parse_arpadatetime(s) if not date: raise ValueError,'wrong format or unknown time zone' litday,day,litmonth,month,year,hour,minute,second,zone = date.groups() if len(year) == 2: year = DateTime.add_century(int(year)) else: year = int(year) if litmonth: litmonth = litmonth.lower() try: month = litmonthtable[litmonth] except KeyError: raise ValueError,'wrong month format' else: month = int(month) day = int(day) hour = int(hour) minute = int(minute) if second is None: second = 0.0 else: second = float(second) offset = Timezone.utc_offset(zone) # litday is ignored return DateTime.DateTime(year,month,day,hour,minute,second) - offset # Alias ParseDateTimeUTC = ParseDateTimeGMT def str(datetime,tz=None): """ str(datetime,tz=DateTime.tz_offset(datetime)) Returns the datetime instance as ARPA date string. tz can be given as DateTimeDelta instance providing the time zone difference from datetime's zone to UTC. It defaults to DateTime.tz_offset(datetime) which assumes local time. """ if tz is None: tz = datetime.gmtoffset() return '%s, %02i %s %04i %02i:%02i:%02i %+03i%02i' % ( _days[datetime.day_of_week], datetime.day, _months[datetime.month], datetime.year, datetime.hour, datetime.minute, datetime.second, tz.hour,tz.minute) def strGMT(datetime): """ strGMT(datetime) Returns the datetime instance as ARPA date string assuming it is given in GMT. """ return '%s, %02i %s %04i %02i:%02i:%02i GMT' % ( _days[datetime.day_of_week], datetime.day, _months[datetime.month], datetime.year, datetime.hour, datetime.minute, datetime.second) def strUTC(datetime): """ strUTC(datetime) Returns the datetime instance as ARPA date string assuming it is given in UTC. """ return '%s, %02i %s %04i %02i:%02i:%02i UTC' % ( _days[datetime.day_of_week], datetime.day, _months[datetime.month], datetime.year, datetime.hour, datetime.minute, datetime.second) def _test(): import sys, os, rfc822 file = os.path.join(os.environ['HOME'], 'nsmail/Inbox') f = open(file, 'r') while 1: m = rfc822.Message(f) if not m: break print 'From:', m.getaddr('from') print 'To:', m.getaddrlist('to') print 'Subject:', m.getheader('subject') raw = m.getheader('date') try: date = ParseDateTimeUTC(raw) print 'Date:',strUTC(date) except ValueError,why: print 'PROBLEMS:',repr(raw),'-->',why raw_input('...hit return to continue') print # Netscape mail file while 1: line = f.readline() if line[:6] == 'From -': break if __name__ == '__main__': _test()
