Python监控目录和文件变化

一、os.listdir

import os, time
path_to_watch = "."
before = dict ([(f, None) for f in os.listdir (path_to_watch)])
while 1:
  time.sleep (10)
  after = dict ([(f, None) for f in os.listdir (path_to_watch)])
  added = [f for f in after if not f in before]
  removed = [f for f in before if not f in after]
  if added: print "Added: ", ", ".join (added)
  if removed: print "Removed: ", ", ".join (removed)
  before = after

二、FindFirstChangeNotification

import os

import win32file
import win32event
import win32con

path_to_watch = os.path.abspath (".")

#
# FindFirstChangeNotification sets up a handle for watching
#  file changes. The first parameter is the path to be
#  watched; the second is a boolean indicating whether the
#  directories underneath the one specified are to be watched;
#  the third is a list of flags as to what kind of changes to
#  watch for. We're just looking at file additions / deletions.
#
change_handle = win32file.FindFirstChangeNotification (
  path_to_watch,
  0,
  win32con.FILE_NOTIFY_CHANGE_FILE_NAME
)

#
# Loop forever, listing any file changes. The WaitFor... will
#  time out every half a second allowing for keyboard interrupts
#  to terminate the loop.
#
try:

  old_path_contents = dict ([(f, None) for f in os.listdir (path_to_watch)])
  while 1:
    result = win32event.WaitForSingleObject (change_handle, 500)

    #
    # If the WaitFor... returned because of a notification (as
    #  opposed to timing out or some error) then look for the
    #  changes in the directory contents.
    #
    if result == win32con.WAIT_OBJECT_0:
      new_path_contents = dict ([(f, None) for f in os.listdir (path_to_watch)])
      added = [f for f in new_path_contents if not f in old_path_contents]
      deleted = [f for f in old_path_contents if not f in new_path_contents]
      if added: print "Added: ", ", ".join (added)
      if deleted: print "Deleted: ", ", ".join (deleted)

      old_path_contents = new_path_contents
      win32file.FindNextChangeNotification (change_handle)

finally:
  win32file.FindCloseChangeNotification (change_handle)

三、ReadDirectoryChanges 


#coding:utf8
#author:lcamry

import
os import win32file import win32con ACTIONS = { 1 : "Created", 2 : "Deleted", 3 : "Updated", 4 : "Renamed from something", 5 : "Renamed to something" } # Thanks to Claudio Grondi for the correct set of numbers FILE_LIST_DIRECTORY = 0x0001 path_to_watch = "." hDir = win32file.CreateFile ( path_to_watch, FILE_LIST_DIRECTORY, win32con.FILE_SHARE_READ | win32con.FILE_SHARE_WRITE | win32con.FILE_SHARE_DELETE, None, win32con.OPEN_EXISTING, win32con.FILE_FLAG_BACKUP_SEMANTICS, None ) while 1: # # ReadDirectoryChangesW takes a previously-created # handle to a directory, a buffer size for results, # a flag to indicate whether to watch subtrees and # a filter of what changes to notify. # # NB Tim Juchcinski reports that he needed to up # the buffer size to be sure of picking up all # events when a large number of files were # deleted at once. # results = win32file.ReadDirectoryChangesW ( hDir, 1024, True, win32con.FILE_NOTIFY_CHANGE_FILE_NAME | win32con.FILE_NOTIFY_CHANGE_DIR_NAME | win32con.FILE_NOTIFY_CHANGE_ATTRIBUTES | win32con.FILE_NOTIFY_CHANGE_SIZE | win32con.FILE_NOTIFY_CHANGE_LAST_WRITE | win32con.FILE_NOTIFY_CHANGE_SECURITY, None, None ) for action, file in results: full_filename = os.path.join (path_to_watch, file) print full_filename, ACTIONS.get (action, "Unknown")

四、watchdog


#coding:utf8
#author:lcamry
from watchdog.observers import Observer
from watchdog.events import *
import time

class FileEventHandler(FileSystemEventHandler):
    def __init__(self):
        FileSystemEventHandler.__init__(self)

    def on_moved(self, event):
        if event.is_directory:
            print("directory moved from {0} to {1}".format(event.src_path,event.dest_path))
        else:
            print("file moved from {0} to {1}".format(event.src_path,event.dest_path))

    def on_created(self, event):
        if event.is_directory:
            print("directory created:{0}".format(event.src_path))
        else:
            print("file created:{0}".format(event.src_path))

    def on_deleted(self, event):
        if event.is_directory:
            print("directory deleted:{0}".format(event.src_path))
        else:
            print("file deleted:{0}".format(event.src_path))

    def on_modified(self, event):
        if event.is_directory:
            print("directory modified:{0}".format(event.src_path))
        else:
            print("file modified:{0}".format(event.src_path))

if __name__ == "__main__":
    observer = Observer()
    event_handler = FileEventHandler()
    observer.schedule(event_handler,"d:/dcm",True)
    observer.start()
    try:
        while True:
            time.sleep(1)
    except KeyboardInterrupt:
        observer.stop()
    observer.join()

五、linux下pyinotify

#coding:utf8
#author:lcamry
import os import pyinotify from functions import * WATCH_PATH = '' #监控目录 if not WATCH_PATH: wlog('Error',"The WATCH_PATH setting MUST be set.") sys.exit() else: if os.path.exists(WATCH_PATH): wlog('Watch status','Found watch path: path=%s.' % (WATCH_PATH)) else: wlog('Error','The watch path NOT exists, watching stop now: path=%s.' % (WATCH_PATH)) sys.exit() class OnIOHandler(pyinotify.ProcessEvent): def process_IN_CREATE(self, event): wlog('Action',"create file: %s " % os.path.join(event.path,event.name)) def process_IN_DELETE(self, event): wlog('Action',"delete file: %s " % os.path.join(event.path,event.name)) def process_IN_MODIFY(self, event): wlog('Action',"modify file: %s " % os.path.join(event.path,event.name)) def auto_compile(path = '.'): wm = pyinotify.WatchManager() mask = pyinotify.IN_CREATE | pyinotify.IN_DELETE | pyinotify.IN_MODIFY notifier = pyinotify.ThreadedNotifier(wm, OnIOHandler()) notifier.start() wm.add_watch(path, mask,rec = True,auto_add = True) wlog('Start Watch','Start monitoring %s' % path) while True: try: notifier.process_events() if notifier.check_events(): notifier.read_events() except KeyboardInterrupt: notifier.stop() break if __name__ == "__main__": auto_compile(WATCH_PATH)

 

posted @ 2018-01-31 15:13  lcamry  阅读(...)  评论(... 编辑 收藏