udp协议 基于socketserver实现并发
一:udp协议没有粘包问题:
1,udp协议是数据报协议
客户端:
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',8080))#不需要建立链接,直接sendto发送和消息内容,对方的地址信息
client.sendto('world'.encode('utf-8'),('127.0.0.1',8080))
# client.sendto(''.encode('utf-8'),('127.0.0.1',8080))
client.close()
服务端:
import socket
server=socket.socket(socket.AF_INET,socket.SOCK_DGRAM) #数据报协议-》udp
server.bind(('127.0.0.1',8080))
data,client_addr=server.recvfrom(1) #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()
二;基于socketserver(基于udp协议)实现并发效果
1,服务端:
import socketserver
class MyHandler(socketserver.BaseRequestHandler):
def handle(self):
#通信循环
# print(self.client_address)
# print(self.request)
data=self.request[0]
print('客户消息',data)
self.request[1].sendto(data.upper(),self.client_address)
if __name__ == '__main__':
s=socketserver.ThreadingUDPServer(('127.0.0.1',8080),MyHandler)
s.serve_forever()
2 , 客 户端:
import socket
client=socket.socket(socket.AF_INET,socket.SOCK_DGRAM) #数据报协议-》udp
while True:
# msg=input('>>: ').strip() #msg=''
msg='client444444'
client.sendto(msg.encode('utf-8'),('127.0.0.1',8080))
data,server_addr=client.recvfrom(1024)
print(data)
client.close()
三:基于socketserver(基于tcp协议)实现并发效果
1 客户端链接
import socketserver
class MyHandler(socketserver.BaseRequestHandler):
def handle(self):
#通信循环
while True:
# print(self.client_address)
# print(self.request) #self.request=conn
try:
data=self.request.recv(1024)
if len(data) == 0:break
self.request.send(data.upper())
except ConnectionResetError:
break
if __name__ == '__main__':
s=socketserver.ThreadingTCPServer(('127.0.0.1',8080),MyHandler,bind_and_activate=True)
s.serve_forever() # 代表连接循环
# 循环建立连接,每建立一个连接就会启动一个线程(服务员)+调用Myhanlder类产生一个对象,
#调用该对象下的handle方法,专门与刚刚建立好的连接做通信循环 、
2 服务端
import socket
phone=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
phone.connect(('127.0.0.1',8080)) # 指定服务端ip和端口
while True:
# msg=input('>>: ').strip() #msg=''
msg = 'client33333' # msg=''
if len(msg) == 0:continue
phone.send(msg.encode('utf-8'))
data=phone.recv(1024)
print(data)
phone.close()