Tcp\UDP通讯

TCP服务器通讯:

import  socket
sk=socket.socket()
sk.bind(('127.0.0.1',8080))
sk.listen()
print("正在开启监听模式")
client,comment=sk.accept()
print(client,comment)
while 1:
    msg_c=client.recv(1024)
    print(msg_c.decode('utf-8'))
    msg_s=input('>>>>>>>')
    client.send(msg_s.encode('utf-8'))

client.close()
sk.close()

Tcp客户端通讯:

import socket
sk=socket.socket()

sk.connect(('127.0.0.1',8080))

while 1:
    msg_c=input('>>>>>>')
    sk.send(msg_c.encode('utf-8'))
    msg_s=sk.recv(1024)
    print(msg_s.decode('utf-8'))

sk.close()

UDP服务器:

import  socket
sk=socket.socket(type=socket.SOCK_DGRAM)
sk.bind(('127.0.0.1',9090))
while 1:
    msg_c,add=sk.recvfrom(1024)
    print(msg_c.decode('utf-8'))
    msg_s=input('>>>')
    sk.sendto(msg_s.encode('utf-8'),add)


sk.close()

UDP客户端:

import socket
sk=socket.socket(type=socket.SOCK_DGRAM)
while 1:
    msg_c=input('>>>')
    sk.sendto(msg_c.encode('utf-8'),('127.0.0.1',9090))
    msg_r,add=sk.recvfrom(1024)
    print(msg_r.decode('utf-8'))


sk.close()

扩展方法UDP不转utf-8格式:

class my_socket(socket.socket):
    def __init__(self,encoding='utf-8'):
        self.encoding=encoding
        super(my_socket, self).__init__(type=socket.SOCK_DGRAM)
    def send(self,msg,addr):
        return self.sendto(msg.encode(self.encoding),addr)
    def receive(self,num):
        msg,addr=self.recvfrom(num)
        return msg.decode(self.encoding),addr

重写socket的一个子类,通过子类调用父类socket方法

udp服务器:

from My_Socket import my_socket

sk = my_socket()
sk.bind(('127.0.0.1', 8080))
while 1:
    msg, addr = sk.receive(1024)
    print(msg)
    msg_s = input('>>>>>>')
    sk.send(msg_s, addr)

sk.close()

UDP客户端:

from My_Socket import my_socket
#
sk = my_socket()
while 1:
    msg_c=input('>>>>>')
    sk.send(msg_c,('127.0.0.1',8080))
    msg,addr=sk.receive(1024)
    print(msg)


sk.close()

  

扩展方法TCP不转utf-8格式:

class my_sockettcp(socket.socket):
    def __init__(self,encoding="utf-8"):
        self.encoding=encoding
        super(my_sockettcp, self).__init__(type=socket.SOCK_STREAM)

    def Tcpsend(self,cli,msg):
        return cli.send(msg.encode(self.encoding))
    def Tcpreceive(self,cli,num):
        msg=cli.recv(num)
        return msg.decode(self.encoding)

TCP服务器:

from My_Socket import my_sockettcp
sk=my_sockettcp()
sk.bind(('192.168.12.16',18080))
sk.listen()
print("正在监听")
cli,addr=sk.accept()
print(cli)
while 1:
    msg=sk.Tcpreceive(cli,1024)
    print(msg)
    msg_s=input('>>>>>')
    sk.Tcpsend(cli,msg)

cli.close()
sk.close()

Tcp客户端:

from My_Socket import my_sockettcp
sk=my_sockettcp()
sk.connect(('192.168.12.16',18080))
while 1:
    msg=input('>>>>>')
    sk.Tcpsend(sk,msg)
    msg_s=sk.Tcpreceive(sk,1024)
    print(msg_s)

sk.close()

Pycharm输出带颜色字体:

  \033[字体颜色;背景颜色m   数据   \033[0m

TCP协议的三次握手与四次挥手:

  

tcp三次握手: 一定是client先发起请求

             a  客户端发起请求连接服务器

             b  服务器返回 : 接收到请求,并要求连接客户端

             c  客户端回复 : 可以连接

       四次挥手:  谁先发起断开连接的请求都可以

             a  客户端发起断开连接的请求:

                  意思是: 我想和你断开连接,我没有数据要继续发送了,但是如果你有数据需要发送,我可以继续接收

                b  服务器回复 : 我接收到你的请求了

                c  服务器发送 : 我已经准备好断开连接了

                d  客户端回复 : 收到你的信息,断开连接

 

posted @ 2018-08-13 21:39  浮云遮月  阅读(167)  评论(0编辑  收藏  举报