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[3.11] gh-88352: Fix logging.TimedRotatingFileHandler (GH-116191) by miss-islington · Pull Request #116209 · python/cpython · GitHub

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[3.11] gh-88352: Fix logging.TimedRotatingFileHandler (GH-116191) #116209

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serhiy-storchaka merged 1 commit into from
Mar 1, 2024
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[3.11] gh-88352: Fix logging.TimedRotatingFileHandler (GH-116191) #116209

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51 changes: 21 additions & 30 deletions Lib/logging/handlers.py
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Original file line number Diff line number Diff line change
Expand Up @@ -299,7 +299,7 @@ def computeRollover(self, currentTime):

r = rotate_ts - ((currentHour * 60 + currentMinute) * 60 +
currentSecond)
if r < 0:
if r <= 0:
# Rotate time is before the current time (for example when
# self.rotateAt is 13:45 and it now 14:15), rotation is
# tomorrow.
Expand Down Expand Up @@ -328,17 +328,18 @@ def computeRollover(self, currentTime):
daysToWait = self.dayOfWeek - day
else:
daysToWait = 6 - day + self.dayOfWeek + 1
newRolloverAt = result + (daysToWait * (60 * 60 * 24))
if not self.utc:
dstNow = t[-1]
dstAtRollover = time.localtime(newRolloverAt)[-1]
if dstNow != dstAtRollover:
if not dstNow: # DST kicks in before next rollover, so we need to deduct an hour
addend = -3600
else: # DST bows out before next rollover, so we need to add an hour
addend = 3600
newRolloverAt += addend
result = newRolloverAt
result += daysToWait * (60 * 60 * 24)
if not self.utc:
dstNow = t[-1]
dstAtRollover = time.localtime(result)[-1]
if dstNow != dstAtRollover:
if not dstNow: # DST kicks in before next rollover, so we need to deduct an hour
addend = -3600
if not time.localtime(result-3600)[-1]:
addend = 0
else: # DST bows out before next rollover, so we need to add an hour
addend = 3600
result += addend
return result

def shouldRollover(self, record):
Expand Down Expand Up @@ -415,17 +416,14 @@ def doRollover(self):
then we have to get a list of matching filenames, sort them and remove
the one with the oldest suffix.
"""
if self.stream:
self.stream.close()
self.stream = None
# get the time that this sequence started at and make it a TimeTuple
currentTime = int(time.time())
dstNow = time.localtime(currentTime)[-1]
t = self.rolloverAt - self.interval
if self.utc:
timeTuple = time.gmtime(t)
else:
timeTuple = time.localtime(t)
dstNow = time.localtime(currentTime)[-1]
dstThen = timeTuple[-1]
if dstNow != dstThen:
if dstNow:
Expand All @@ -436,26 +434,19 @@ def doRollover(self):
dfn = self.rotation_filename(self.baseFilename + "." +
time.strftime(self.suffix, timeTuple))
if os.path.exists(dfn):
os.remove(dfn)
# Already rolled over.
return

if self.stream:
self.stream.close()
self.stream = None
self.rotate(self.baseFilename, dfn)
if self.backupCount > 0:
for s in self.getFilesToDelete():
os.remove(s)
if not self.delay:
self.stream = self._open()
newRolloverAt = self.computeRollover(currentTime)
while newRolloverAt <= currentTime:
newRolloverAt = newRolloverAt + self.interval
#If DST changes and midnight or weekly rollover, adjust for this.
if (self.when == 'MIDNIGHT' or self.when.startswith('W')) and not self.utc:
dstAtRollover = time.localtime(newRolloverAt)[-1]
if dstNow != dstAtRollover:
if not dstNow: # DST kicks in before next rollover, so we need to deduct an hour
addend = -3600
else: # DST bows out before next rollover, so we need to add an hour
addend = 3600
newRolloverAt += addend
self.rolloverAt = newRolloverAt
self.rolloverAt = self.computeRollover(currentTime)

class WatchedFileHandler(logging.FileHandler):
"""
Expand Down
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