Das deutsche Python-Forum

Code: Alles auswählen

import logging
from datetime import date
import string


class DailyRollingFileHandler(logging.FileHandler):
    def __init__(self, filename, mode="a"):
        """
        Open the specified file and use it as the stream for logging.

        Rollover occurs whenever the day changes.

        The names of the log files each contain the date when they were
        created. Thus if the filename "myapp.log" was used, the log files
        each have look like myapp-2005-01-07.log etc.

        The date is inserted at the position of the last '.' in the filename
        if any or simply appended to the given name if no dot was present.
        """
        self.currentDay   = date.today()
        # create the logfile name parts (base part and extension)
        nameparts     = string.split(string.strip(filename), ".")
        self.filestub = ""
        self.fileext  = ""

        # remove empty items
        while nameparts.count("") > 0:
            nameparts.remove("")

        if len(nameparts) < 2:
            self.filestub = nameparts[0]
        else:
            # construct the filename
            for part in nameparts[0:-2]:
                self.filestub += part + "."
            self.filestub += nameparts[-2]
            self.fileext   = "." + nameparts[-1]
            
        logging.FileHandler.__init__(self, self.getFilename(), mode)

    def getFilename(self):
        return self.filestub + "-" + self.currentDay.isoformat() + self.fileext

    def doRollover(self):
        """
        Do a rollover, as described in __init__().
        """

        self.stream.close()
        self.currentDay   = date.today()        
        self.baseFilename = self.getFilename()
        self.stream = open(self.baseFilename, "w")

    def emit(self, record):
        """
        Emit a record.

        Output the record to the file, catering for rollover as described
        in doRollover().
        """
        msg = "%s\n" % self.format(record)
        self.stream.seek(0, 2)  #due to non-posix-compliant Windows feature
        if date.today() != self.currentDay:
            self.doRollover()
        logging.FileHandler.emit(self, record)

Code: Alles auswählen

# Copyright 2004-2005 by Stephan Stapel <stephan.stapel@web.de>. All Rights Reserved.
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose and without fee is hereby granted,
# provided that the above copyright notice appear in all copies and that
# both that copyright notice and this permission notice appear in
# supporting documentation, and that the name of Stephan Stapel
# not be used in advertising or publicity pertaining to distribution
# of the software without specific, written prior permission.
#
# STEPHAN STAPEL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
# ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
# STEPHAN STAPEL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
# ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
# IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

import logging
from datetime import date
import string
    
class DailyRollingFileHandler(logging.FileHandler):
    """
    The class is based on the standard RotatingFileHandler class from the
    official logging module.

    It rolls over each day, thus one log file per day is created in the form
    myapp-2005-01-07.log, myapp-2005-01-08.log etc.
    """
    
    def __init__(self, filename, mode="a"):
        """
        Open the specified file and use it as the stream for logging.

        Rollover occurs whenever the day changes.

        The names of the log files each contain the date when they were
        created. Thus if the filename "myapp.log" was used, the log files
        each have look like myapp-2005-01-07.log etc.

        The date is inserted at the position of the last '.' in the filename
        if any or simply appended to the given name if no dot was present.
        """
        self.currentDay   = date.today()
        # create the logfile name parts (base part and extension)
        nameparts     = string.split(string.strip(filename), ".")
        self.filestub = ""
        self.fileext  = ""

        # remove empty items
        while nameparts.count("") > 0:
            nameparts.remove("")

        if len(nameparts) < 2:
            self.filestub = nameparts[0]
        else:
            # construct the filename
            for part in nameparts[0:-2]:
                self.filestub += part + "."
            self.filestub += nameparts[-2]
            self.fileext   = "." + nameparts[-1]
            
        logging.FileHandler.__init__(self, self.getFilename(), mode)

    def getFilename(self):
        return self.filestub + "-" + self.currentDay.isoformat() + self.fileext

    def doRollover(self):
        """
        Do a rollover, as described in __init__().
        """

        self.stream.close()
        self.currentDay   = date.today()        
        self.baseFilename = self.getFilename()
        self.stream = open(self.baseFilename, "w")

    def emit(self, record):
        """
        Emit a record.

        Output the record to the file, catering for rollover as described
        in doRollover().
        """
        msg = "%s\n" % self.format(record)
        self.stream.seek(0, 2)  #due to non-posix-compliant Windows feature
        if date.today() != self.currentDay:
            self.doRollover()
        logging.FileHandler.emit(self, record)