Fixed some access related bugs
These were not obvious previously, but with the sidebar not showing
up when one does not have access, they stood out.
"Implementation of tzinfo classes for use with datetime.datetime."
import locale
import time
from datetime import timedelta, tzinfo
from django.utils.encoding import smart_unicode
try:
DEFAULT_ENCODING = locale.getdefaultlocale()[1] or 'ascii'
except:
# Any problems at all determining the locale and we fallback. See #5846.
DEFAULT_ENCODING = 'ascii'
class FixedOffset(tzinfo):
"Fixed offset in minutes east from UTC."
def __init__(self, offset):
if isinstance(offset, timedelta):
self.__offset = offset
offset = self.__offset.seconds // 60
else:
self.__offset = timedelta(minutes=offset)
self.__name = u"%+03d%02d" % (offset / 60, offset % 60)
def __repr__(self):
return self.__name
def utcoffset(self, dt):
return self.__offset
def tzname(self, dt):
return self.__name
def dst(self, dt):
return timedelta(0)
class LocalTimezone(tzinfo):
"Proxy timezone information from time module."
def __init__(self, dt):
tzinfo.__init__(self)
self._tzname = self.tzname(dt)
def __repr__(self):
return self._tzname
def utcoffset(self, dt):
if self._isdst(dt):
return timedelta(seconds=-time.altzone)
else:
return timedelta(seconds=-time.timezone)
def dst(self, dt):
if self._isdst(dt):
return timedelta(seconds=-time.altzone) - timedelta(seconds=-time.timezone)
else:
return timedelta(0)
def tzname(self, dt):
try:
return smart_unicode(time.tzname[self._isdst(dt)], DEFAULT_ENCODING)
except UnicodeDecodeError:
return None
def _isdst(self, dt):
tt = (dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second, dt.weekday(), 0, -1)
try:
stamp = time.mktime(tt)
except (OverflowError, ValueError):
# 32 bit systems can't handle dates after Jan 2038, and certain
# systems can't handle dates before ~1901-12-01:
#
# >>> time.mktime((1900, 1, 13, 0, 0, 0, 0, 0, 0))
# OverflowError: mktime argument out of range
# >>> time.mktime((1850, 1, 13, 0, 0, 0, 0, 0, 0))
# ValueError: year out of range
#
# In this case, we fake the date, because we only care about the
# DST flag.
tt = (2037,) + tt[1:]
stamp = time.mktime(tt)
tt = time.localtime(stamp)
return tt.tm_isdst > 0