python实现从ftp上下载⽂件的实例⽅法python从ftp上下载⽂件的⽅法：
⾸先导⼊ftp模块；
然后使⽤【chdir】命令切换⼯作路径；
再使⽤“self.ftp.nlst()”命令获取⽬录下的⽂件；
最后使⽤“binary()”命令下载ftp⽂件即可。
#!/usr/bin/python
# coding=utf-8
import os
from ftplib import FTP # 引⼊ftp模块
class MyFtp:
ftp = FTP()
def __init__(self,host,port=21):
t(host,port)
def login(self,username,pwd):
self.ftp.set_debuglevel(2) # 打开调试级别2，显⽰详细信息
self.ftp.login(username,pwd)
p
rint(self.ftp.welcome)
def downloadFile(self,localpath,remotepath,filename):
os.chdir(localpath) # 切换⼯作路径到下载⽬录
self.ftp.cwd( remotepath) # 要登录的ftp⽬录
self.ftp.nlst() # 获取⽬录下的⽂件
file_handle = open(filename,"wb").write # 以写模式在本地打开⽂件
binary('RETR %s' % os.path.basename(filename),file_handle,blocksize=1024) # 下载ftp⽂件
# ftp.delete（filename） # 删除ftp服务器上的⽂件
def close(self):
self.ftp.set_debuglevel(0) # 关闭调试
self.ftp.quit()if __name__ == '__main__':
ftp = MyFtp('host')
ftp.login('username','pwd')
ftp.downloadFile('E:\\RED\\workspace\\appAuto\\apk\\Android10','/mobile/Android/release10/','xxx.apk')
ftp.close()
实例扩展：
#coding=utf-8
'''
ftp⾃动下载、⾃动上传脚本，可以递归⽬录操作
'''
from ftplib import FTP
import os,sys,string,datetime,time
import socket
class MYFTP:
def __init__(self, hostaddr, username, password, remotedir, port=21):
self.hostaddr = hostaddr
self.username = username
self.password = password
self.port = port
self.ftp = FTP()
self.file_list = []
# self.ftp.set_debuglevel(2)
def __del__(self):
self.ftp.close()
# self.ftp.set_debuglevel(0)
def login(self):
ftp = self.ftp
try:
timeout = 300
socket.setdefaulttimeout(timeout)
ftp.set_pasv(True)
print u'开始连接到 %s' %(self.hostaddr)
print u'成功连接到 %s' %(self.hostaddr)
print u'开始登录到 %s' %(self.hostaddr)
ftp.login(self.username, self.password)
print u'成功登录到 %s' %(self.hostaddr)
debug_welcome())
except Exception:
print u'连接或登录失败'
try:
ftp.dir)
except(Exception):
print u'切换⽬录失败'
def is_same_size(self, localfile, remotefile):
try:
remotefile_size = self.ftp.size(remotefile)
except:
remotefile_size = -1
try:
localfile_size = size(localfile)
except:
localfile_size = -1
connect下载debug_print('localfile_size:%d remotefile_size:%d' %(localfile_size, remotefile_size),) if remotefile_size == localfile_size:
return 1
else:
return 0
def download_file(self, localfile, remotefile):
if self.is_same_size(localfile, remotefile):
debug_print(u'%s ⽂件⼤⼩相同，⽆需下载' %localfile)
return
else:
debug_print(u'>>>>>>>>>>>>下载⽂件 %s ... ...' %localfile)
#return
file_handler = open(localfile, 'wb')
binary(u'RETR %s'%(remotefile), file_handler.write)
file_handler.close()
def download_files(self, localdir='./', remotedir='./'):
try:
self.ftp.cwd(remotedir)
except:
debug_print(u'⽬录%s不存在，继续...' %remotedir)
return
if not os.path.isdir(localdir):
os.makedirs(localdir)
debug_print(u'切换⾄⽬录 %s' %self.ftp.pwd())
self.file_list = []
self.ftp._file_list)
remotenames = self.file_list
#print(remotenames)
#return
for item in remotenames:
filetype = item[0]
filename = item[1]
local = os.path.join(localdir, filename)
if filetype == 'd':
self.download_files(local, filename)
elif filetype == '-':
self.download_file(local, filename)
self.ftp.cwd('..')
debug_print(u'返回上层⽬录 %s' %self.ftp.pwd())
def upload_file(self, localfile, remotefile):
if not os.path.isfile(localfile):
return
if self.is_same_size(localfile, remotefile):
debug_print(u'跳过[相等]: %s' %localfile)
return
file_handler = open(localfile, 'rb')
self.ftp.storbinary('STOR %s' %remotefile, file_handler)
file_handler.close()
debug_print(u'已传送: %s' %localfile)
def upload_files(self, localdir='./', remotedir = './'):
if not os.path.isdir(localdir):
return
localnames = os.listdir(localdir)
self.ftp.cwd(remotedir)
for item in localnames:
src = os.path.join(localdir, item)
if os.path.isdir(src):
try:
self.ftp.mkd(item)
except:
debug_print(u'⽬录已存在 %s' %item)
self.upload_files(src, item)
else:
self.upload_file(src, item)
self.ftp.cwd('..')
def get_file_list(self, line):
ret_arr = []
file_arr = _filename(line)
if file_arr[1] not in ['.', '..']:
self.file_list.append(file_arr)
def get_filename(self, line):
pos = line.rfind(':')
while(line[pos] != ' '):
pos += 1
while(line[pos] == ' '):
pos += 1
file_arr = [line[0], line[pos:]]
return file_arr
def debug_print(s):
print s
if __name__ == '__main__':
timenow = time.localtime()
datenow = time.strftime('%Y-%m-%d', timenow)
# 配置如下变量
hostaddr = '211.15.113.45' # ftp地址
username = 'UserName' # ⽤户名
password = '123456' # 密码
port = 21 # 端⼝号
rootdir_local = 'E:/mypiv' # 本地⽬录
rootdir_remote = '/PIV' # 远程⽬录
f = MYFTP(hostaddr, username, password, rootdir_remote, port)
f.login()
f.download_files(rootdir_local, rootdir_remote)
timenow = time.localtime()
datenow = time.strftime('%Y-%m-%d', timenow)
logstr = u"%s 成功执⾏了备份n" %datenow
debug_print(logstr)
到此这篇关于python实现从ftp上下载⽂件的实例⽅法的⽂章就介绍到这了，更多相关python怎么实现从ftp上下载⽂件内容请搜索以前的⽂章或继续浏览下⾯的相关⽂章希望⼤家以后多多⽀持！
版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系QQ:729038198，我们将在24小时内删除。
发表评论