[terry笔记]python FTP

Posted 2020-08-21

如下是作业，用python做一个ftp，主要利用socket。

server端在linux下运行，在client端可以执行shell命令（静态的）

在client端输入get xxx，即可下载。

在client端输入put xxx，即可上传。

 

server端：

 1 import socket
 2 import subprocess
 3 import os
 4 server = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
 5 server.bind(("0.0.0.0",8000))
 6 server.listen(5)
 7 print("start to listen".center(30,"-"))
 8 
 9 while True:
10     conn,client_addr = server.accept()
11     print(conn,client_addr)
12     while True:
13         try:
14             data = conn.recv(1024)
15             print("receive from client :",data)
16             if (data.decode()).startswith("get"):
17                 data_cmd = data.decode()
18                 data_cmd_list = data_cmd.split(" ")
19                 file_name = data_cmd_list[-1]
20                 conn.send(str(os.path.getsize(file_name)).encode())
21                 f = open(file_name,"rb")
22                 f_data = f.readlines()
23                 for line in f_data:
24                     conn.send(line)
25             elif (data.decode()).startswith("put"):
26                 data_size = conn.recv(1024)
27                 if data_size.decode() == "no file":
28                     continue
29                 print("The file‘s size is %sM" % round(int(data_size.decode()) / 1024 / 1024, 2))
30                 data_list = (data.decode()).split(" ")
31                 file_name = data_list[-1]
32                 f = open(file_name, "wb")
33                 total_size = int(data_size.decode())
34                 file_size = 0
35                 while True:
36                     data2 = conn.recv(1024)
37                     f.write(data2)
38                     file_size += len(data2)
39                     if file_size == total_size:
40                         break
41                 f.close()
42                 print("file upload done")
43             else:
44                 res_obj = subprocess.Popen(data,shell=True,stdout=subprocess.PIPE,stderr=subprocess.PIPE)
45                 res = res_obj.stdout.read()
46                 conn.send(str(len(res)).encode())
47                 print("--res len :",len(res))
48                 conn.send(res)
49         except ConnectionResetError as e:
50             print(client_addr,"is break")
51             break
52         except FileNotFoundError as e:
53             print("there is no such file!")
54             conn.send(b"no file")
55             continue

 

client端：

 1 import socket
 2 import os
 3 client = socket.socket()
 4 client.connect(("192.168.168.128",8000))
 5 # client.connect(("localhost",8000))
 6 
 7 while True:
 8     try:
 9         msg = input(">>>>>").strip()
10         if len(msg) == 0: continue
11         client.send(msg.encode())
12         if msg.startswith("get"):
13             data = client.recv(1024)
14             if data.decode() == "no file":
15                 print("there is no such file!")
16                 continue
17             else:
18                 print("The file‘s size is %sM" % round(int(data.decode())/1024/1024,2))
19                 msg_list = msg.split(" ")
20                 file_name = msg_list[-1]
21                 f = open(file_name,"wb")
22                 total_size = int(data.decode())
23                 file_size = 0
24                 while True:
25                     data2 = client.recv(1024)
26                     f.write(data2)
27                     file_size += len(data2)
28                     if file_size == total_size:
29                         break
30                 f.close()
31         elif msg.startswith("put"):
32             msg_cmd_list = msg.split(" ")
33             file_name = msg_cmd_list[-1]
34             client.send(str(os.path.getsize(file_name)).encode())
35             f = open(file_name, "rb")
36             f_data = f.readlines()
37             for line in f_data:
38                 client.send(line)
39         else:
40             data = client.recv(1024)
41             print("client receive:", data.decode())
42             total_size = int(data.decode())
43             received_size = 0
44             res = b""
45             while received_size < total_size:
46                 d = client.recv(1024)
47                 res += d
48                 received_size += len(d)
49             print("-----receive done-----")
50             print(res.decode())
51     except FileNotFoundError as e:
52         print("There is no such file!")
53         client.send(b"no file")
54         continue