python socket实例练习

　　Web Server是基于Socket编程，又称之为网络编程，socket是网络编程接口，socket可以建立网络连接，读数据，写数据。socket模块定义了一些常量参数，用来指定socket的的地址族、socket的类型、以及支持的TCP/IP协议。

　　有一篇写的比较详细的关于HTTP协议请求过程和socket的文章，链接：http://www.admin10000.com/document/9347.html

　　简单实例测试socket, 代码如下：

 from socket import socket, AF_INET, SOCK_STREAM
 from threading import Thread

 port = 50008
 host = 'localhost'

 def server():
     # 建立tcp连接
     sock = socket(AF_INET, SOCK_STREAM)
     # 绑定本机和端口
     sock.bind(('', port))
     # 监听，允许连接的客户数量
     sock.listen(5)
     while True:
         # 等待客户端连接
         conn, addr = sock.accept()
         # 读取客户端请求的字节数据
         data = conn.recv(1024)
         # 响应请求给客户端
         reply = 'server got [%s]' % data
         conn.send(reply.encode())

 def client(name):
     sock = socket(AF_INET, SOCK_STREAM)
     sock.connect((host, port))
     sock.send(name.encode())
     reply = sock.recv(1024)
     sock.close()
     print('client got [%s]' % reply)

 if __name__ == '__main__':
     sthread = Thread(target=server)
     sthread.daemon = True
     sthread.start()
     for i in range(5):
         Thread(target=client, args=('client%s' % i, )).start()

　　运行结果如下：

 client got [b"server got [b'client0']"]
 client got [b"server got [b'client1']"]
 client got [b"server got [b'client2']"]
 client got [b"server got [b'client3']"]
 client got [b"server got [b'client4']"]