【Python】就UDP的传输方式

coding = 'utf-8'
link = ('127.0.0.1', 8000)
BUFFER_SIZE = 1024

# UDP 协议 基于数据报的协议,没有管道或建立连接的情况,不会粘包,多余数据不会留在缓存

# 服务端
from socket import *
server = socket(AF_INET, SOCK_DGRAM) # SOCK_DGRAM 数据报协议,代表UDP, 允许发空(实际上有地址)
server.bind(*link)

# server.listen(5)
# while 1:
#   conn, addr = server.accept()  # 无握手,不等待

while 1:
    msg, client_addr = server.recvfrom(BUFFER_SIZE )
    print(msg)
    server.sendto(msg.upper(), client_addr)
    if msg == 'end':
        server.close()
        break

# 客户端
from socket import *
client = socket(AF_INET, SOCK_DGRAM)

while 1:
    msg = input('>>').strip()
    client.sendto(msg.encode(coding), link)
    data, server_addr = client.recvfrom(BUFFER_SIZE)
    print(data, server_addr)

    if msg == 'end':
        client.close()
        break