python 基于UDP协议套接字通信的实现

'''
from socket import *

server=socket(AF_INET,SOCK_DGRAM)
	- 这里代指的是一种数据报协议，数据报协议指的就是udp协议(补充: 数据报就是自己utp协议中有自己的头，有自己的数据部分)

server.bind('IP', PORT)

bytes类型的数据, client_addr = server.recvfrom(1024)
  - client_addr是一个2元组的形式: 第一个参数是客户端的IP地址, 第二个参数是客户端发送数据进程软件的端口号.

server.sendto(bytes类型处理过后的数据, client_addr)

server.close()
'''
from socket import *
server=socket(AF_INET,SOCK_DGRAM)
IP_PORT=('127.0.0.1',8123)
server.bind(IP_PORT)
while True:
  print("server wait...")
  data_bytes,client_addr=server.recvfrom(1024)
  server.sendto(data_bytes.upper(),client_addr)
  print('data_bytes:', data_bytes)
  print('client_addr:', client_addr)
server.close()

'''
from socket import *

client=socket(AF_INET,SOCK_DGRAM)

client.sendto(bytes类型的数据, ('服务端IP', 服务端端口))

data_bytes, client_addr = client.recvfrom(1024)

client.close()
'''
import socket

client = socket.socket(family=socket.AF_INET, type=socket.SOCK_DGRAM)
IP_PORT=('127.0.0.1',812<span style="color:transparent">来1源gaodai#ma#com搞*代#码1网</span>3)
while True:
  msg=input("请输入要发送的消息》》》").strip()
  client.sendto(msg.encode("utf-8"),IP_PORT)
  data_bytes,server_addr=client.recvfrom(1024)
  print("data_bytes:",data_bytes)
  print("server_addr:",server_addr)
client.close()

import socket

server = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) # 数据报协议-》udp
server.bind(('127.0.0.1', 8084))

data, client_addr = server.recvfrom(1024) # b'hello'==>b'h'
print('第一次：', client_addr, data)

data, client_addr = server.recvfrom(1024) # b'world' =>b'world'
print('第二次：', client_addr, data)
#
data,client_addr=server.recvfrom(1024)
print('第三次：',client_addr,data)

server.close()

import socket

client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) # 数据报协议-》udp

client.sendto('hello'.encode('utf-8'), ('127.0.0.1', 8084))
client.sendto('world'.encode('utf-8'), ('127.0.0.1', 8084))
client.sendto(''.encode('utf-8'),('127.0.0.1',8084))

client.close()