python网络编程

客户端socket

#!/usr/bin/env python3
#-*- coding:utf-8 -*-
'''
'''
#导入socket网络编程模块
import socket
#创建客户端通信对象
client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

#建立客户端与服务器连接,ip+port以数组的方式传入
client_socket.connect(('', 80))
#执行客户端操作
client_socket.send(b'GET / HTTP/1.1\r\nHost: \r\nConnection: close\r\n\r\n')

#接收数据
buffer=[]
while True:
    datarecv=client_socket.recv(1024)
    if datarecv:
        buffer.append(datarecv)
    else:
        break
data = b''.join(buffer)
#关闭链接
client_socket.close()

header, html = data.split(b'\r\n\r\n',1)
print(header.decode('utf-8'))
#数据写入文件
with open('sina.html', 'wb') as f:
    f.write(html)

t@localhost untitled$ python3 socket_client.py 
HTTP/1.1 200 OK
Content-Type: text/html
Vary: Accept-Encoding
X-Powered-By: schi_v1.02
Server: nginx
Date: Mon, 09 May 2016 08:26:19 GMT
Last-Modified: Mon, 09 May 2016 08:24:36 GMT
Expires: Mon, 09 May 2016 08:27:19 GMT
Cache-Control: max-age=60
Age: 48
Content-Length: 549273
X-Cache: HIT from localhost
Connection: close

服务端socket
服务端

#!/usr/bin/env python3
#-*- coding:utf-8 -*-
'''
'''
#导入库
import socket, threading, time
#创建socket实例
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
#绑定监听网卡
server_socket.bind(('0.0.0.0', 10086))
#监听连接,最大连接数5
server_socket.listen(5)
print('Wait for connection...')
#定义处理函数
def tcplink(sock, addr):
    print('sock:',type(sock))
    print('addr:',type(addr))
    print('Accept new connection from %s:%s' % addr)
    sock.send(b'Welcome!')
    while True:
        data = sock.recv(1024)
        time.sleep(1)
        if not data or data.decode(('utf-8')) == 'exit':
            break
        sock.send(('Hello, %s!' % data.decode('utf-8')).encode('utf-8'))
    sock.close()
    print('Connection from %s:%s closed.' % addr )
#创建永久循环来接受客户端连接
while True:
#接受一个新连接
    sock, addr = server_socket.accept()
#创建一个线程处理请求
    t = threading.Thread(target=tcplink, args=(sock, addr))
    t.start()

客户端

#!/usr/bin/env python3
#-*- coding:utf-8 -*-
'''
'''


import socket
socket_client = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
socket_client.connect(('127.0.0.1',10086))
print(socket_client.recv(1024).decode('utf-8'))
for data in [b'talen',b'eric',b'tom']:
    socket_client.send(data)
    print(socket_client.recv(1024).decode('utf-8'))
socket_client.send(b'exit')
socket_client.close()

print('the connection from %s:%s is closed' % addr)   # addr是一个tuple(IP,port)，需要两个%s来接受数据。the connection from 127.0.0.1:20481 is closed

t@localhost untitled$ python3 socket_client2.py 
Welcome!
Hello, talen!
Hello, eric!
Hello, tom!

参考学习: