python ftp服务器搭建_利用Python快速搭建HTTP&FTP服务器

Python自带了一个ftplib模块，可以用来创建FTP服务器。下面是一个简单的Python脚本，用于创建一个FTP服务器：

import os
import sys
from ftplib import FTP
from threading import Thread

class FTPHandler(FTP):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.cwd = os.getcwd()

    def cdup(self):
        self.cwd = os.path.dirname(self.cwd)
        super().cwd(self.cwd)

    def cwd(self, path):
        self.cwd = os.path.join(self.cwd, path)
        super().cwd(self.cwd)

def handle_client(client_socket):
    """
    处理客户端请求
    """
    ftp = FTPHandler()
    ftp.set_pasv(True)
    ftp.sock = client_socket
    print('FTP连接来自:', client_socket.getpeername())
    ftp.welcome = 'Welcome to my FTP server.'
    ftp.login()
    while True:
        try:
            cmd = client_socket.recv(1024).decode()
            if not cmd:
                break
            print(cmd)
            cmd = cmd.split()
            if cmd[0] == 'QUIT':
                ftp.quit()
                break
            elif cmd[0] == 'CWD':
                ftp.cwd(cmd[1])
                client_socket.send(b'250 Directory changed.\r\n')
            elif cmd[0] == 'CDUP':
                ftp.cdup()
                client_socket.send(b'200 Directory changed.\r\n')
            elif cmd[0] == 'PWD':
                client_socket.send(('257 "%s"\r\n' % ftp.cwd).encode())
            elif cmd[0] == 'LIST':
                data_socket, addr = ftp.transfercmd('LIST')
                client_socket.send(b'150 Here comes the directory listing.\r\n')
                data = data_socket.recv(1024)
                while data:
                    client_socket.send(data)
                    data = data_socket.recv(1024)
                data_socket.close()
                client_socket.send(b'226 Directory send OK.\r\n')
            elif cmd[0] == 'RETR':
                file = open(os.path.join(ftp.cwd, cmd[1]), 'rb')
                data_socket, addr = ftp.transfercmd('RETR ' + cmd[1])
                client_socket.send(b'150 Opening data connection.\r\n')
                data = file.read(1024)
                while data:
                    data_socket.send(data)
                    data = file.read(1024)
                file.close()
                data_socket.close()
                client_socket.send(b'226 Transfer complete.\r\n')
            else:
                client_socket.send(('502 Command not implemented.\r\n').encode())
        except Exception as e:
            print(e)
            break
    client_socket.close()

def main():
    """
    启动服务器
    """
    host = ''
    port = 21
    backlog = 5
    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    server_socket.bind((host, port))
    server_socket.listen(backlog)
    print('FTP服务器已经启动，监听端口为:', port)
    while True:
        try:
            client_socket, addr = server_socket.accept()
            Thread(target=handle_client, args=(client_socket,)).start()
        except KeyboardInterrupt:
            sys.exit(0)

if __name__ == '__main__':
    main()

该脚本启动一个FTP服务器，监听21端口。在客户端输入命令时，它会响应CWD、CDUP、PWD、LIST和RETR命令。

使用该脚本非常简单，只需要运行该脚本即可启动一个FTP服务器。