2.3 利用FTP服务器下载和上传文件

from ftplib import FTP
from os.path import exists

def getfile(file,site,dir,user=(),*,verbose=True,refetch=False):       #verbose为是否打印信息，refetch为是否重新获取文件
    if exists(file) and not refetch:
        if verbose: print(file,‘already fetched‘)
    else:
        if verbose:print(‘Downloading‘,file)
        local = open(file,‘wb‘)
        try:
            remote = FTP(site)
            remote.login(*user)
            remote.cwd(dir)
            remote.retrbinary(‘RETR ‘ + file, local.write, 1024)
            remote.quit()
            if verbose: print(‘Finished‘)
        finally:
            local.close()


if __name__ == ‘__main__‘:
    file = ‘new_1.py‘
    dir = ‘.‘
    site = ‘192.168.191.1‘
    user = ()
    getfile(file,site,dir,user)

import ftplib

def putfile(file,site,dir,user=(),*,verbose=True):
    if verbose: print(‘Uploading‘,file)
    local = open(file,‘rb‘)
    remote = ftplib.FTP(site)
    remote.login(*user)
    remote.cwd(dir)
    remote.storbinary(‘STOR ‘ + file,local,1024)
    remote.quit()
    local.close()
    if verbose: print(‘Upload done‘)

if __name__ == ‘__main__‘:
    file = ‘test.py‘
    dir = ‘.‘
    site = ‘192.168.191.1‘
    user = ()
    putfile(file, site, dir, user)