import socket
port=8081
s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
#从指定的端口，从任何发送者，接收UDP数据
s.bind(('',port))
print('正在等待接入...')
while True:
  #接收一个数据
  data,addr=s.recvfrom(1024)
  print('Received:',data,'from',addr)

import socket
port=8081
host='localhost'
s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
s.sendto(b'hello,this is a test info !',(host,port))

#-*- coding: utf-8 -*-
from socket import *
from time import ctime

HOST=''
PORT=12345
BUFSIZ=1024
ADDR=(HOST, PORT)
sock=socket(AF_INET, SOCK_STREAM)

sock.bind(ADDR)

sock.listen(5)
while True:
  print('waiting for connection')
  tcpClientSock, addr=sock.accept()
  print('connect from ', addr)
  while True:
    try:
      data=tcpClientSock.recv(BUFSIZ)
    except:
      print(e)
      tcpClientSock.close()
      break
    if not data:
      break
    s='Hi,you send me :[%s] %s' %(ctime(), data.decode('utf8'))
    tcpClientSock.send(s.encode('utf8'))
    print([ctime()], ':', data.decode('utf8'))
tcpClientSock.close()
sock.close()

#-*- coding: utf-8 -*-
from socket import *

class TcpClient:
  HOST='127.0.0.1'
  PORT=12345
  BUFSIZ=1024
  ADDR=(HOST, PORT)
  def __init__(self):
    self.client=socket(AF_INET, SOCK_STREAM)
    self.client.connect(self.ADDR)

    while True:
      data=input('>')
      if not data:
        break
      self.client.send(data.encode('utf8'))
      data=self.client.recv(self.BUFSIZ)
      if not data:
        break
      print(data.decode('utf8'))
      
if __name__ == '__main__':
  client=TcpClient()

#-*- coding: utf-8 -*-
from socket import *
from time import ctime
from time import localtime
import time

HOST=''
PORT=1122 #设置侦听端口
BUFSIZ=1024
ADDR=(HOST, PORT)
sock=socket(AF_INET, SOCK_STREAM)

sock.bind(ADDR)

sock.listen(5)
#设置退出条件
STOP_CHAT=False
while not STOP_CHAT:
  print('等待接入，侦听端口:%d' % (PORT))
  tcpClientSock, addr=sock.accept()
  print('接受连接，客户端地址：',addr)
  while True:
    try:
      data=tcpClientSock.recv(BUFSIZ)
    except:
      #print(e)
      tcpClientSock.close()
      break
    if not data:
      break
    #python3使用bytes，所以要进行编码
    #s='%s发送给我的信息是:[%s] %s' %(addr[0],ctime(), data.decode('utf8'))
    #对日期进行一下格式化
    ISOTIMEFORMAT='%Y-%m-%d %X'
    stime=time.strftime(ISOTIMEFORMAT, localtime())
    s='%s发送给我的信息是:%s' %(addr[0],data.decode('utf8'))
    tcpClientSock.send(s.encode('utf8'))
    print([stime], ':', data.decode('utf8'))
    #如果输入quit(忽略大小写),则程序退出
    STOP_CHAT=(data.decode('utf8').upper()=="QUIT")
    if STOP_CHAT:
      break
tcpClientSock.close()
sock.close()

#-*- coding: utf-8 -*-
from socket import *

class TcpClient:
  #测试，连接本机
  HOST='127.0.0.1'
  #设置侦听端口
  PORT=1122 
  BUFSIZ=1024
  ADDR=(HOST, PORT)
  def __init__(self):
    self.client=socket(AF_INET, SOCK_STREAM)
    self.client.connect(self.ADDR)

    while True:
      data=input('>')
      if not data:
        break
      #python3传递的是bytes，所以要编码
      self.client.send(data.encode('utf8'))
      print('发送信息到%s：%s' %(self.HOST,data))
      if data.upper()=="QUIT":
        break      
      data=self.client.recv(self.BUFSIZ)
      if not data:
        break
      print('从%s收到信息：%s' %(self.HOST,data.decode('utf8')))
      
      
if __name__ == '__main__':
  client=TcpClient()