python tcp,udp简单使用

import socket

host = '127.0.0.1'
port = 9999

#创建一个tcp socket套接字
tcp_server = socket.socket(socket.AF_INIT, socket.SOCK.STREAM)
#绑定ip,port
tcp_server.bind((host, port))
#设置最大连接数
tcp_server.listen(5)
#监听
while True:
    client, address = tcp_server.accept()
    print "received from %s:%d" %(address[0], address[1])
    #设置接收字节
    request = client.recv(1024)
    print 'receive data %s' %request
    #发送接收成功通知
    client.send('ACK!')
    #关闭
    client.close()

一个简单的tcp服务端

import socket

target_host = '127.0.0.1'
target_port = 9999

#创建一个tcp socket套接字
tcp_client = socket.socket(socket.AF_INIT, socket.SOCK_STREAM)
#连接到目标
tcp_client.connect((target_host, target_port))
#发送数据
tcp_client.send('test')
#接收来自服务器的数据
response = tcp_client.recv(1024)
print response
tcp_client.close

一个简单的tcp客户端

import socket

host = '127.0.0.1'
port = 9999

udp_server = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
udp_server.bind((host, port))
print '..waiting for message..'
while True:
    data, address = udp_server.recvfrom(1024)
    print 'Received data %s for %s:%d' %(data, address[0], address[1])
    udp_server.sendto('success', address)
udp_server.close()

一个简单的UDP服务端

import socket

target_host = '127.0.0.1'
target_port = 9999

client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

client.sendto("AAABBBCCC", (target_host, target_port))

data, addr = client.recvfrom(4096)

print data
print addr
client.close()

一个简单的UDP客户端

最大的区别在于是否需要建立连接，tcp是可靠的需要连接，而udp是不可靠的不需要连接，其他的都比较类似