68 lines
1.6 KiB
Python
68 lines
1.6 KiB
Python
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import datetime
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import re
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rfc3339_re = re.compile(r'(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})(\.\d+)?(?:Z|([+-]\d{2}):(\d{2}))')
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def parse_rfc3339(v):
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m = rfc3339_re.match(v)
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if not m or m.group(0) != v:
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return None
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return parse_rfc3339_re(m)
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def parse_rfc3339_re(m):
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r = map(int, m.groups()[:6])
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if m.group(7):
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micro = float(m.group(7))
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else:
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micro = 0
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if m.group(8):
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g = int(m.group(8), 10) * 60 + int(m.group(9), 10)
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tz = _TimeZone(datetime.timedelta(0, g * 60))
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else:
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tz = _TimeZone(datetime.timedelta(0, 0))
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y, m, d, H, M, S = r
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return datetime.datetime(y, m, d, H, M, S, int(micro * 1000000), tz)
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def format_rfc3339(v):
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offs = v.utcoffset()
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offs = int(offs.total_seconds()) // 60 if offs is not None else 0
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if offs == 0:
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suffix = 'Z'
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else:
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if offs > 0:
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suffix = '+'
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else:
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suffix = '-'
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offs = -offs
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suffix = '{0}{1:02}:{2:02}'.format(suffix, offs // 60, offs % 60)
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if v.microsecond:
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return v.strftime('%Y-%m-%dT%H:%M:%S.%f') + suffix
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else:
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return v.strftime('%Y-%m-%dT%H:%M:%S') + suffix
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class _TimeZone(datetime.tzinfo):
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def __init__(self, offset):
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self._offset = offset
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def utcoffset(self, dt):
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return self._offset
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def dst(self, dt):
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return None
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def tzname(self, dt):
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m = self._offset.total_seconds() // 60
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if m < 0:
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res = '-'
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m = -m
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else:
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res = '+'
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h = m // 60
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m = m - h * 60
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return '{}{:.02}{:.02}'.format(res, h, m)
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