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51 lines
1.7 KiB
Python
51 lines
1.7 KiB
Python
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"""
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Custom formatters for the logging handlers.
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"""
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from __future__ import absolute_import
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import logging
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import sys
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import time
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class ISO8601Formatter(logging.Formatter):
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"""
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An ISO 8601 compliant formatter for log messages. It formats the
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timezone as an hour/minute offset and uses a period as the
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millisecond separator in order to match the log messages of MongoDB.
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"""
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def formatTime(self, record, datefmt=None):
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converted_time = self.converter(record.created)
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if datefmt is not None:
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return time.strftime(datefmt, converted_time)
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formatted_time = time.strftime("%Y-%m-%dT%H:%M:%S", converted_time)
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timezone = ISO8601Formatter._format_timezone_offset(converted_time)
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return "%s.%03d%s" % (formatted_time, record.msecs, timezone)
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@staticmethod
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def _format_timezone_offset(converted_time):
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"""
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Returns the timezone as an hour/minute offset in the form
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"+HHMM" or "-HHMM".
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"""
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# Windows treats %z in the format string as %Z, so we compute the hour/minute offset
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# manually.
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if converted_time.tm_isdst == 1 and time.daylight:
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utc_offset_secs = time.altzone
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else:
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utc_offset_secs = time.timezone
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# The offset is positive if the local timezone is behind (east of) UTC, and negative if it
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# is ahead (west) of UTC.
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utc_offset_prefix = "-" if utc_offset_secs > 0 else "+"
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utc_offset_secs = abs(utc_offset_secs)
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utc_offset_mins = (utc_offset_secs / 60) % 60
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utc_offset_hours = utc_offset_secs / 3600
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return "%s%02d%02d" % (utc_offset_prefix, utc_offset_hours, utc_offset_mins)
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