socket模拟服务器，客户端下载东西（ftp）

服务端（ftp_server.py）

 1 import hashlib,socket,os
 2 
 3 server = socket.socket()
 4 server.bind(("localhost",9999))
 5 server.listen()
 6 while True:
 7     client,address = server.accept()
 8     while True:
 9         req_data = client.recv(1024)
10         print(req_data.decode())
11         if not req_data:
12             print("客户端连接已断开")
13             break
14         if len(req_data) == 0: continue
15         if os.path.isfile(req_data.decode()):
16             file_size = os.stat(req_data).st_size
17             print("file size:",file_size)
18             client.send(str(file_size).encode('utf-8'))
19             client_ack = client.recv(1024)
20             f = open(req_data,'rb')
21             for line in f:
22                 m = hashlib.md5()
23                 print(line)
24                 client.send(line)
25                 m.update(line)
26             res = m.hexdigest()
27             client.send(res.encode('utf-8'))
28         else:
29             client.send("无此文件")
View Code

客户端（ftp_client.py）

 1 import socket,hashlib
 2 
 3 client = socket.socket()
 4 client.connect(("localhost",9999))
 5 while True:
 6     cmd = input("输入文件名>>:")
 7     if cmd !=None or cmd != '':
 8         client.send(cmd.encode('utf-8'))
 9     file_total_size = client.recv(1024)
10     print(file_total_size)
11     file_total_size = int(file_total_size)
12     client.send(b"ok")
13     curent_size = 0
14     size = 0
15     m = hashlib.md5()
16     f = open(cmd+"new",'wb')
17     while curent_size != file_total_size:
18         if file_total_size-curent_size > 1024:#不是最后一次
19             size = 1024
20         else:
21             size = file_total_size-curent_size
22         ser_info = client.recv(size)
23         print(ser_info)
24         f.write(ser_info)
25         m.update(ser_info)
26         curent_size += len(ser_info)
27 
28     else:
29         print("原文件：%s，新文件：%s"%(str(file_total_size),str(curent_size)))
30         ser_md5 = client.recv(1024)
31         cli_md5 = m.hexdigest()
32         f.close()
33         print("cli_md5:%s,ser_md5:%s"%(cli_md5,ser_md5.decode()))
View Code

说明：

1.程序使用python3运行

2.明确http传输的基本概念

posted @ 2017-12-26 22:36  海的味道  阅读(497)  评论(0)  编辑  收藏  举报