Python：socket实现ftp程序

Posted 2021-01-21 本博客不再更新，新博客地址：https://blog.zs-

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刚开始学习socket编程，还不是特熟练，码了好长时间，中间遇到许多问题，记录一下用socketserver写ftp

server端：

 1 #!/usr/bin/env python
 2 
 3 import socketserver,os
 4 
 5 class FTP(socketserver.BaseRequestHandler):
 6     def handle(self):
 7         def clientsend(filename):
 8             f = open(‘/ftp/%s‘ %filename,‘w‘)
 9         #    while 1:    
10             data = self.request.recv(4096).decode("utf-8")
11         #    if not data:break
12             f.write(data)
13             f.close()
14             print(‘File %s  receive done!‘ % filename)
15         def clientdownload(filename):
16             f = open(‘/ftp/%s‘ %filename,‘r‘)
17             data = f.read()
18             f.close()
19             self.request.sendall(data.encode("utf-8"))
20         print(‘listening connect from:‘,self.client_address)
21         listmsg = ‘list:
1.help			dispaly the list
2.send file		send + filename
3.download file		download + filename
4.ls			Show files and permissions
5.exit
‘
22         self.request.sendall("Welcome my ftp,input 33[34;1m‘help‘33[0m dispaly meun".encode("utf-8"))
23         while 1:
24             try:
25                 re_msg = self.request.recv(1024).decode("utf-8")
26                 if not re_msg:break
27                 if re_msg == ‘help‘ or re_msg == ‘?‘:
28                     self.request.sendall(listmsg.encode("utf-8"))
29                 elif re_msg.split()[0] == ‘send‘:
30                     filename = re_msg.split()[1]
31                     clientsend(filename)
32                 elif re_msg.split()[0] == ‘ls‘:
33                     ls_list = os.popen(‘ls -l /ftp‘).read().encode("utf-8")
34                     self.request.sendall(ls_list)
35                 elif re_msg.split()[0] == ‘download‘:
36                     filename = re_msg.split()[1]
37                     clientdownload(filename)
38                 else:
39                     self.request.sendall(‘Invalid value‘.encode("utf-8"))
40             finally:
41                 pass
42 if __name__ == ‘__main__‘:　#只有程序执行时才会触发下面的语句，程序被导入调用时，下面的语句不会触发
43     host = ‘192.168.101.128‘
44     port = 2222
45     server = socketserver.ThreadingTCPServer((host,port),FTP)
46     server.serve_forever()

client端：

 1 #!/usr/bin/env python
 2 import socket,sys
 3 
 4 host = ‘192.168.101.128‘
 5 port = 2222
 6 
 7 s = socket.socket()
 8 s.connect((host,port))
 9 info = s.recv(8096).decode("utf-8")
10 print(info)
11 while 1:
12     INPUT = str(input(‘input:‘))
13     if INPUT.split()[0] == ‘send‘:
14         s.send(INPUT.encode("utf-8"))
15         filename = INPUT.split()[1]
16         f = open(filename,‘r‘)
17         file_data = f.read()
18         f.close()
19         s.sendall(file_data.encode("utf-8"))
20         print(‘file sent finished!‘)
21     elif INPUT.split()[0] == ‘download‘:
22         s.send(INPUT.encode("utf-8"))
23         filename = INPUT.split()[1]
24         f = open(filename,‘w‘)
25         data = s.recv(8096).decode("utf-8")
26         f.write(data)
27         f.close()
28         print(‘%s has been download!‘ %filename)
29     elif INPUT.split()[0] == ‘exit‘:
30         sys.exit()
31     else:
32         s.send(INPUT.encode("utf-8"))
33         data = s.recv(8096).decode("utf-8")
34         print(data)
35 s.close()