python udp

python udp

server.py

# -*-coding:utf-8 -*-

import socket
import sys
HOST=''
PORT=8888

try:
    s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
    print('socket created')
except socket.error:
    print('created failed')
    sys.exit()

#bind socket
try:
    s.bind((HOST,PORT))
except socket.error:
    print('bind failed')

print('bind ok')

#keep talking with client
while True:
    #server receive and send
    d=s.recvfrom(1024)
    data=d[0]
    addr=d[1]

    if not data:
        break
    reply='ok...'+data.decode('utf-8')

    s.sendto(reply.encode('utf-8'),addr)
    print('message[' +addr[0]+':'+str(addr[1])+']-'+data.strip())
s.close()

client.py

# -*-coding:utf-8 -*-

import socket
import sys

#create dgram udp socket
try:
    s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
except socket.error:
    print('create udp failed')
    sys.exit()

host='localhost'
port=8888

while True:
    msg='this is client'

    try:
        #client send and receive
        s.sendto(msg.encode('utf-8'),(host,port))

        d=s.recvfrom(1024)
        reply=d[0]
        addr=d[1]

        print('server reply:'+reply.decode('utf-8'))
    except socket.error:
        print('client error')
        sys.exit()