python网络编程简介

1 # coding:utf8
2
3 import socket
4
5 target_host &＃61; &＃39;www.chengzhier.com&＃39;
6 target_port &＃61; 80
7
8 # 建立一个socket 对象
9 # socket.AF_INET表示IPv4地址&＃xff0c;或者主机名
10 # socket.SCOK_STREAM 这将是一个TCP客户端
11 client &＃61; socket.socket(socket.AF_INET, socket.SOCK_STREAM)
12
13 # 连接客户端
14 client.connect((target_host, target_port))
15
16 # 发送一些数据
17 client.send("GET / HTTP/1.1\r\nHost: chengzhier.com\r\n\r\n")
18
19 # 接收一些数据
20 response &＃61; client.recv(4096)
21
22 print response

1 # coding:utf8
2
3 import socket
4
5 target_host &＃61; &＃39;127.0.0.1&＃39;
6 target_port &＃61; 80
7
8 # 建立一个socket 对象
9 # socket.AF_INET表示IPv4地址&＃xff0c;或者主机名
10 # socket.SCOK_DGRAM 这将是一个UDP客户端
11 client &＃61; socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
12
13
14 # 发送一些数据
15 client.sendto("AABBCC", (target_host, target_port))
16
17 # 接收一些数据
18 # 这里老是报出 socket error 10054 应该是本地的防火墙的问题
19 data, addr &＃61; client.recvfrom(4096)
20
21 print data

1 # coding:utf8
2 import socket
3 import threading
4
5 bind_ip &＃61; "0.0.0.0"
6 bind_port &＃61; 9999
7
8 server &＃61; socket.socket(socket.AF_INET, socket.SOCK_STREAM)
9
10 server.bind((bind_ip, bind_port))
11
12 server.listen(5)
13
14 print "[*] Listening on %s:%d " % (bind_ip, bind_port)
15
16 # 这是客户处理线程
17 def handle_client(client_socket):
18
19 # 打印出客户端发送得到内容
20 request &＃61; client_socket.recv(1024)
21
22 print "[*] Received: %s" % request
23
24 # 返还一个数据包
25 client_socket.send("ACK!")
26
27 client_socket.close()
28
29 while True:
30
31 client, addr &＃61; server.accept()
32 print "[*] Accepted connection from: %s:%d" % (addr[0], addr[1])
33
34 # 挂起客户端&＃xff0c;处理传入的数据
35 client_handler &＃61; threading.Thread(target&＃61;handle_client, args&＃61;(client,))
36
37 client_handler.start()

1 # coding:utf8
2
3 import socket
4
5 target_host &＃61; &＃39;127.0.0.1&＃39;
6 target_port &＃61; 9999
7
8 # 建立一个socket 对象
9 # socket.AF_INET表示IPv4地址&＃xff0c;或者主机名
10 # socket.SCOK_STREAM 这将是一个TCP客户端
11 client &＃61; socket.socket(socket.AF_INET, socket.SOCK_STREAM)
12
13 # 连接客户端
14 client.connect((target_host, target_port))
15
16 # 发送一些数据
17 client.send("GET / HTTP/1.1\r\nHost: 127.0.0.1\r\n\r\n")
18
19 # 接收一些数据
20 response &＃61; client.recv(4096)
21
22 print response