python-网络

1、tcp-ipv4方式

• python2

1）server端：

from socket import *

from time import ctime

HOST=''

PORT=21567

BUFSIZ=1024

ADDR=(HOST,PORT)

tcpsocket=socket(AF_INET,SOCK_STREAM)

tcpsocket.bind(ADDR)

tcpsocket.listen(5)

while True:

    print("waiting for connecting...")

    tcpCliSock,addr=tcpsocket.accept()

    print('...connect from:',addr)

    while True:

        data=tcpCliSock.recv(BUFSIZ)

        if not data:

            break

        tcpCliSock.send('[%s] %s' % (ctime(),data))

    tcpCliSock.close()

tcpsocket.close()

2）client端

from socket import *

HOST='127.0.0.1'

PORT=21567

BUFSIZ=1024

ADDR=(HOST,PORT)

tcpCliSock=socket(AF_INET,SOCK_STREAM)

tcpCliSock.connect(ADDR)

while True:

    data=raw_input('> ')

    if not data:

        break

    tcpCliSock.send(data)

    data=tcpCliSock.recv(BUFSIZ)

    if not data:

        break

    print(data)

tcpCliSock.close()

• python3

1）server端： 

from socket import *

from time import ctime

HOST=''

PORT=21567

BUFSIZ=1024

ADDR=(HOST,PORT)

tcpsocket=socket(AF_INET,SOCK_STREAM)

tcpsocket.bind(ADDR)

tcpsocket.listen(5)

while True:

    print("waiting for connecting...")

    tcpCliSock,addr=tcpsocket.accept()

    print('...connect from:',addr)

    while True:

        data=tcpCliSock.recv(BUFSIZ)

        if not data:

            break

        tcpCliSock.send(('[%s] %s' % (ctime(),str(data,'utf-8'))).encode())

    tcpCliSock.close()

tcpsocket.close()

2）client端

from socket import *

HOST='127.0.0.1'

PORT=21567

BUFSIZ=1024

ADDR=(HOST,PORT)

tcpCliSock=socket(AF_INET,SOCK_STREAM)

tcpCliSock.connect(ADDR)

while True:

    data=input('> ')

    if not data:

        break

    tcpCliSock.send(data.encode())

    data=tcpCliSock.recv(BUFSIZ)

    if not data:

        break

    print(data.decode('utf-8'))

tcpCliSock.close()

2、tcp-ipv6方式

与ipv4的区别：server和client中将AF_INET改为AF_INET6，client中将127.0.0.1改为::1,也可以用localhost(v4/v6都可以)。

3、udp-ipv4方式