day 29
一、TCP协议代码实现
1、基础版:
-------------socket.serve-------import socket# 买手机 默认得到是一个TCP的socketserver = socket.socket()# 两行代码的效果是一样的# socket的家族 AF_INET# socket的类型# SOCK_STREAM 对应的是TCP SOCK_DGRAM 对应的是UDP# server = socket.socket(socket.AF_INET,socket.SOCK_STREAM,0)# 床架基于UDP的socket# server = socket.socket(socket.AF_INET,socket.SOCK_DGRAM,0)server.bind(("127.0.0.1",16888)) # 绑定手机卡server.listen() # 开始待机# 得到对方的socket对象与地址client,addr = server.accept() # 接收通话请求 # 该函数会阻塞 直到有连接请求过来print("==========")# buffersize 表示应用程序的缓冲区大小 recv其实是 从系统缓冲区读取数据到应用程序data = client.recv(1024) # 该函数会阻塞 直到操作缓冲区有数据位置print("==========")-----------------socket.client----------------import socketclient = socket.socket()client.connect(("127.0.0.1",16888))client.send("hello 服务器".encode("utf-8"))print("===================")data = client.recv(1024) # 该函数会阻塞 直到操作缓冲区有数据位置print("===================")print("收到服务器:%s" % data.decode("utf-8"))client.close()
2、TPC异常处理版:
---------------socket.serve-------------import socketserver = socket.socket()server.bind(("127.0.0.1",8888))server.listen()client,addr = server.accept()while True: try: data = client.recv(1024) #win状态下客户端异常关闭,会抛出错误 if not data: #如果是linux 不会抛出异常 会死循环收到空的数据包 print("对方已经关闭.....") break print(data.decode("utf-8")) client.send(data.upper()) except ConnectionResetError: print("对方异常关闭连接...")client.close()server.close()---------------socket.client-------------import socketclient = socket.socket()client.connect(("127.0.0.1",8888))client.send("hello".encode("utf-8"))data = client.recv(1024)print(data.decode("utf-8"))client.close()
3、半连接池:
----------socket.serve--------import socketserver = socket.socket()server.bind(("127.0.0.1",8888))# 参数可以设置最大的半连接数 最大5个server.listen(5)import timewhile True: time.sleep(0.5)server.close()---------socket.client---------import socketclient = socket.socket()client.connect(("127.0.0.1",8888))while True: client.send(input(">>:").encode("utf-8")) data = client.recv(1024) print(data.decode("utf-8"))client.close()
4、循环收发:
-------------------socket.serve-----------import socket# 买手机 默认得到是一个TCP的socketserver = socket.socket()# 两行代码的效果是一样的# socket的家族 AF_INET# socket的类型# SOCK_STREAM 对应的是TCP SOCK_DGRAM 对应的是UDP# server = socket.socket(socket.AF_INET,socket.SOCK_STREAM,0)# 创建基于UDP的socket# server = socket.socket(socket.AF_INET,socket.SOCK_DGRAM,0)server.bind(("127.0.0.1",16888)) # 绑定手机卡server.listen() # 开始待机# 连接循环 可以不断接受新连接while True: client, addr = server.accept() # 通讯循环 可以不断的收发数据 while True: try: # 如果是windows 对方强行关闭连接 会抛出异常 # 如果是linux 不会抛出异常 会死循环收到空的数据包 data = client.recv(1024) if not data: client.close() break print("收到客户端发来的数据:%s" % data.decode("utf-8")) client.send(data) except ConnectionResetError: print("客户端强行关闭了连接") client.close() breakclient.close() #挂断电话server.close() # 关机---------------socket.client--------------import socketclient = socket.socket()client.connect(("127.0.0.1",16888))while True: msg = input(">:") client.send(msg.encode("utf-8")) data = client.recv(1024) print("收到服务器:%s" % data.decode("utf-8"))client.close()
二、UDP协议代码实现:
------------------socket.serve--------------import socket# UDP协议 在创建socket是 只有一个类型不同server = socket.socket(socket.AF_INET,socket.SOCK_DGRAM,proto=0)server.bind(("127.0.0.1",8888))while True: data,addr = server.recvfrom(1024) # 阻塞 直到收到数据为止 print("收到来自%s的消息:%s" % (data.decode("utf-8"),addr[0])) # 返回值为 数据 和 对方ip地址 和端口号 server.sendto(data.upper(),addr)print(res)server.close()---------------socket.client1--------------import socketclient = socket.socket(socket.AF_INET,socket.SOCK_DGRAM,0)while True: data = input(">>:").encode("utf-8") client.sendto(data,("127.0.0.1",8888)) d,addr = client.recvfrom(1024) print(d.decode("utf-8"))client.close()------------socket.client2--------------import socketclient = socket.socket(socket.AF_INET,socket.SOCK_DGRAM,0)while True: data = input(">>:").encode("utf-8") client.sendto(data,("127.0.0.1",8888)) d,addr = client.recvfrom(1024) print(d.decode("utf-8"))client.close()