pyftpdlib代码实战

最新推荐文章于 2025-05-28 10:00:00 发布

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最新推荐文章于 2025-05-28 10:00:00 发布

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分类专栏： Python基础文章标签： ftp服务器 pyftpdlib

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本文介绍了如何使用pyftpdlib库创建一个FTP服务器，并着重讲解了如何添加日志管理、启用MD5加密用户密码、实现多线程/多进程支持、带宽限制以及SSL认证。此外，还探讨了自定义事件回调处理，增强了服务器的安全性和可控性。

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新建一个基本的ftp服务器

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

def main():
    authorizer = DummyAuthorizer()
    authorizer.add_user('user', '12345', '.', perm='elradfmwM')

    authorizer.add_anonymous(os.getcwd())              #此处添加一个匿名用户

    handler = FTPHandler                               #初始化处理客户端命令的类
    handler.authorizer = authorizer

    handler.banner = "pyftpdlib based ftpd ready."     #客户端连接时返回的字符串

    #handler.masquerade_address = '151.25.42.11'       #如果你在NAT之后，就用这个指定被动连接的参数
    #handler.passive_ports = range(60000, 65535)

    address = ('0.0.0.0', 2121)                        #设置服务器的监听地址和端口
    server = FTPServer(address, handler)


    server.max_cons = 256                              #给链接设置限制
    server.max_cons_per_ip = 5

    server.serve_forever()                             # 启动服务器

if __name__ == '__main__':
    main()

添加一个日志管理功能

level可以等于logging.INFO或者 logging.DEBUG，后者记录的更加详细
启用logging后，屏幕上不显示了，全都重定向到了自己设置的.log文件中

import logging

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

authorizer = DummyAuthorizer()
authorizer.add_user('user', '12345', '.', perm='elradfmwM')
handler = FTPHandler
handler.authorizer = authorizer

logging.basicConfig(filename='/var/log/pyftpd.log', level=logging.INFO)

server = FTPServer(('', 2121), handler)
server.serve_forever()

md5加密用户名密码，一定程度上防止攻击

import os
import sys
from hashlib import md5

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

#继承类以后添加加密功能
class DummyMD5Authorizer(DummyAuthorizer):

    def validate_authentication(self, username, password, handler):
        if sys.version_info >= (3, 0):
            password = md5(password.encode('latin1'))
        hash = md5(password).hexdigest()
        try:
            if self.user_table[username]['pwd'] != hash:
                raise KeyError
        except KeyError:
            raise AuthenticationFailed


def main():
    # get a hash digest from a clear-text password
    hash = md5('12345').hexdigest()
    authorizer = DummyMD5Authorizer()
    authorizer.add_user('user', hash, os.getcwd(), perm='elradfmw')
    authorizer.add_anonymous(os.getcwd())
    handler = FTPHandler
    handler.authorizer = authorizer
    server = FTPServer(('', 2121), handler)
    server.serve_forever()

if __name__ == "__main__":
    main()

多线程和多进程

from pyftpdlib.handlers import FTPHandler
from pyftpdlib.servers import ThreadedFTPServer  # <-
from pyftpdlib.authorizers import DummyAuthorizer


def main():
    authorizer = DummyAuthorizer()
    authorizer.add_user('user', '12345', '.')
    handler = FTPHandler
    handler.authorizer = authorizer
    server = ThreadedFTPServer(('', 2121), handler)
    server.serve_forever()

if __name__ == "__main__":
    main()

from pyftpdlib.handlers import FTPHandler
from pyftpdlib.servers import MultiprocessFTPServer  # <-
from pyftpdlib.authorizers import DummyAuthorizer


def main():
    authorizer = DummyAuthorizer()
    authorizer.add_user('user', '12345', '.')
    handler = FTPHandler
    handler.authorizer = authorizer
    server = MultiprocessFTPServer(('', 2121), handler)
    server.serve_forever()

if __name__ == "__main__":
    main()

带宽限制

import os

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


def main():
    authorizer = DummyAuthorizer()
    authorizer.add_user('user', '12345', os.getcwd(), perm='elradfmw')
    authorizer.add_anonymous(os.getcwd())

    dtp_handler = ThrottledDTPHandler
    dtp_handler.read_limit = 30720  # 30 Kb/sec (30 * 1024)
    dtp_handler.write_limit = 30720  # 30 Kb/sec (30 * 1024)

    ftp_handler = FTPHandler
    ftp_handler.authorizer = authorizer
    # have the ftp handler use the alternative dtp handler class
    ftp_handler.dtp_handler = dtp_handler

    server = FTPServer(('', 2121), ftp_handler)
    server.serve_forever()

if __name__ == '__main__':
    main()

添加ssl认证

"""
An RFC-4217 asynchronous FTPS server supporting both SSL and TLS.
Requires PyOpenSSL module (http://pypi.python.org/pypi/pyOpenSSL).
"""

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


def main():
    authorizer = DummyAuthorizer()
    authorizer.add_user('user', '12345', '.', perm='elradfmw')
    authorizer.add_anonymous('.')
    handler = TLS_FTPHandler
    handler.certfile = 'keycert.pem'
    handler.authorizer = authorizer
    # requires SSL for both control and data channel
    #handler.tls_control_required = True
    #handler.tls_data_required = True
    server = FTPServer(('', 21), handler)
    server.serve_forever()

if __name__ == '__main__':
    main()

自定义事件回调处理

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


class MyHandler(FTPHandler):

    def on_connect(self):
        print "%s:%s connected" % (self.remote_ip, self.remote_port)

    def on_disconnect(self):
        # do something when client disconnects
        pass

    def on_login(self, username):
        # do something when user login
        pass

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

    def on_file_sent(self, file):
        # do something when a file has been sent
        pass

    def on_file_received(self, file):
        # do something when a file has been received
        pass

    def on_incomplete_file_sent(self, file):
        # do something when a file is partially sent
        pass

    def on_incomplete_file_received(self, file):
        # remove partially uploaded files
        import os
        os.remove(file)


def main():
    authorizer = DummyAuthorizer()
    authorizer.add_user('user', '12345', homedir='.', perm='elradfmw')
    authorizer.add_anonymous(homedir='.')

    handler = MyHandler
    handler.authorizer = authorizer
    server = FTPServer(('', 2121), handler)
    server.serve_forever()

if __name__ == "__main__":
    main()