监视远程FTP目录 [英] Monitor remote FTP directory

问题描述

我只能通过FTP访问远程服务器上的目录，并希望在目录中出现新文件后立即获取它们.

I only have FTP access to a directory on a remote server and would like to get the contents of new files as soon as they appear in the directory.

是否有FAM for Python之类的东西可以让我通过FTP监视新文件?

Is there any thing like FAM for Python that lets me monitor for new files over FTP?

推荐答案

如果轮询服务器是一种选择:

If polling the server is an option:

from ftplib import FTP
from time import sleep

ftp = FTP('localhost')
ftp.login()

def changemon(dir='./'):
    ls_prev = set()

    while True:
        ls = set(ftp.nlst(dir))

        add, rem = ls-ls_prev, ls_prev-ls
        if add or rem: yield add, rem

        ls_prev = ls
        sleep(5)

for add, rem in changemon():
    print('\n'.join('+ %s' % i for i in add))
    print('\n'.join('- %s' % i for i in remove))

ftp.quit()

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