Python搭建FTP服务器

Python版本 3.6.2

使用的ftp包:pyftpdlib    pip install pyftpdlib就可以下载安装了

FTP协议下载上传文件在文件过大的情况下会比HTTP更具有优势，更为方便的实现断点上传和进度监控，下面是官方文档中的基本方法

import os

from pyftpdlib.authorizers import DummyAuthorizer
from pyftpdlib.handlers import FTPHandler
from pyftpdlib.servers import FTPServer

def main():
    # 实例化用户授权管理
    authorizer = DummyAuthorizer()
    authorizer.add_user('user', '12345', 'path', perm='elradfmwMT')#添加用户 参数:username,password,允许的路径,权限
    authorizer.add_anonymous(os.getcwd())#这里是允许匿名用户,如果不允许删掉此行即可

    # 实例化FTPHandler
    handler = FTPHandler
    handler.authorizer = authorizer

    # 设定一个客户端链接时的标语
    handler.banner = "pyftpdlib based ftpd ready."

    #handler.masquerade_address = '151.25.42.11'#指定伪装ip地址
    #handler.passive_ports = range(60000, 65535)#指定允许的端口范围

    address = (ipaddr, 21)#FTP一般使用21,20端口
    server = FTPServer(address, handler)#FTP服务器实例

    # set a limit for connections
    server.max_cons = 256
    server.max_cons_per_ip = 5

    # 开启服务器
    server.serve_forever()

if __name__ == '__main__':
    main()

开启ftp服务器后要确定防火墙开启了21,20端口,并且在客户端的浏览器中设置internet选项高级选项卡中的被动ftp的勾去掉之后才能登陆到ftp服务器

从Windows登录到服务器:

利用Python从ftp服务器上下载文件

from ftplib import FTP

ftp=FTP()
ftp.connect('localhost',21)#localhost改成服务器ip地址
ftp.login(user='user',passwd='12345')

file=open('f://ftpdownload/test.txt','wb')
ftp.retrbinary("RETR test.txt",file.write,1024)#从服务器上下载文件 1024字节一个块
ftp.set_debuglevel(0)
ftp.close()

FTP服务器事件回调函数:

class MyHandler(FTPHandler):

    def on_connect(self):#链接时调用
        print "%s:%s connected" % (self.remote_ip, self.remote_port)

    def on_disconnect(self):#关闭连接是调用
        # do something when client disconnects
        pass

    def on_login(self, username):#登录时调用
        # do something when user login
        pass

    def on_logout(self, username):#登出时调用
        # do something when user logs out
        pass

    def on_file_sent(self, file):#文件下载后调用
        # do something when a file has been sent
        pass

    def on_file_received(self, file):#文件上传后调用
        # do something when a file has been received
        pass

    def on_incomplete_file_sent(self, file):#下载文件时调用
        # do something when a file is partially sent
        pass

    def on_incomplete_file_received(self, file):#上传文件时调用
        # remove partially uploaded files
        import os
        os.remove(file)