python TCP UDP

# -*- coding: utf-8 -*- import socket import threading import time def tcplink(sock, addr): print 'Accept new connection from %s:%s...' % addr sock.send('Welcome!') while True: data = sock.recv(1024) time.sleep(1) if data == 'exit' or not data: break sock.send('Hello, %s!' % data) sock.close() print 'Connection from %s:%s closed.' % addr s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.bind(('127.0.0.1',1234)) s.listen(5) print 'Waiting for connection...' while True: # 接受一个新连接: sock, addr = s.accept() # 创建新线程来处理TCP连接: t = threading.Thread(target=tcplink, args=(sock, addr)) t.start()

# -*- coding: utf-8 -*- import socket s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # 建立连接: s.bind(('127.0.0.1',1234)) s.connect(('127.0.0.1', 1234)) # 接收欢迎消息: print s.recv(1024) for data in ['Michael', 'Tracy', 'Sarah']: # 发送数据: s.send(data) print s.recv(1024) s.send('exit') s.close()

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# -*- coding: utf-8 -*- import socket s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) # 绑定端口: s.bind(('127.0.0.1', 9999)) print 'Bind UDP on 9999...' while True: # 接收数据: data, addr = s.recvfrom(1024) print 'Received from %s:%s.' % addr s.sendto('Hello, %s!' % data, addr)

# -*- coding: utf-8 -*- import socket s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) for data in ['Michael', 'Tracy', 'Sarah']: # 发送数据: s.sendto(data, ('127.0.0.1', 9999)) # 接收数据: print s.recv(1024) s.close()