python中的压缩(存档)旧日志文件

Question

我在Python中使用标准记录器库.例如,RotatingFileHandler可以每天旋转日志文件.

但它只是重命名它们.将是伟大的,如果它不仅可以重命名,而且还将旧文件放在zip(或gz,bzip等)存档中.

有没有简单的方法来实现这一目标？

Answer 1

我认为你最好的选择是扩展RotatingFileHandler这样的东西(未经测试):

import os
from logging.handlers import RotatingFileHandler


COMPRESSION_SUPPORTED = {}

try:
   import gzip
   COMPRESSION_SUPPORTED['gz'] = gzip
except ImportError:
   pass

try:
   import zipfile
   COMPRESSION_SUPPORTED['zip'] = zipfile
except ImportError:
   pass


class NewRotatingFileHandler(RotatingFileHandler):

     def __init__(self, *args, **kws):
         compress_mode = kws.pop('compress_mode')

         try:
             self.compress_cls = COMPRESSION_SUPPORTED[compress_mode]
         except KeyError:
             raise ValueError('"%s" compression method not supported.' % compress_mode)

         super(NewRotatingFileHandler, self).__init__(self, *args, **kws)

     def doRollover(self):
         super(NewRotatingFileHandler, self).doRollover()

         # Compress the old log.
         old_log = self.baseFilename + ".1"
         with open(old_log) as log:
             with self.compress_cls.open(old_log + '.gz', 'wb') as comp_log:
                 comp_log.writelines(log)

         os.remove(old_log)

Answer 2

接受的答案将仅归档1个文件 - (basefile.log.1).其他文件不归档.此代码将归档除基本文件之外的所有日志文件.

import os
import gzip
import logging.handlers

class NewRotatingFileHandler(logging.handlers.RotatingFileHandler):
    def __init__(self, filename, **kws):
        backupCount = kws.get('backupCount', 0)
        self.backup_count = backupCount
        logging.handlers.RotatingFileHandler.__init__(self, filename, **kws)

    def doArchive(self, old_log):
        with open(old_log) as log:
            with gzip.open(old_log + '.gz', 'wb') as comp_log:
                comp_log.writelines(log)
       os.remove(old_log)

   def doRollover(self):
      if self.stream:
          self.stream.close()
          self.stream = None
      if self.backup_count > 0:
          for i in range(self.backup_count - 1, 0, -1):
              sfn = "%s.%d.gz" % (self.baseFilename, i)
              dfn = "%s.%d.gz" % (self.baseFilename, i + 1)
              if os.path.exists(sfn):
                  if os.path.exists(dfn):
                      os.remove(dfn)
                  os.rename(sfn, dfn)
      dfn = self.baseFilename + ".1"
      if os.path.exists(dfn):
          os.remove(dfn)
      if os.path.exists(self.baseFilename):
          os.rename(self.baseFilename, dfn)
          self.doArchive(dfn)
      if not self.delay:
          self.stream = self._open()