大家好,又见面了,我是你们的朋友全栈君。
netstart -anp udp | find "9999"
netstart -anbp udp | findstr 9999
echo "123abc" | nc -u 172.0.0.1 9999
import logging
import sys
import socket
logging.basicConfig(format="%(asctime)s %(threadName)s %(thread)d %(message)s",stream=sys.stdout,level=logging.INFO)
server = socket.socket(type=socket.SOCK_DGRAM) #创建一个基于UDP的socket
server.bind(("127.0.0.1",3999)) #立即绑定一个udp端口
# data = server.recv(1024) #阻塞等待数据
data,radde = server.recvfrom(1024) #阻塞等待数据(value,(ip,port))
logging.info("{}-{}".format(radde,data))
server.sendto("{} server msg = {}".format(server.getsockname(),data).encode(),radde)
server.close()
import logging
import sys
import socket
logging.basicConfig(format="%(asctime)s %(threadName)s %(thread)d %(message)s",stream=sys.stdout,level=logging.INFO)
client = socket.socket(type=socket.SOCK_DGRAM)
raddr = "127.0.0.1",3999
client.connect(raddr) #connect方法会自动分配一个本地的UDP地址,和设置UDP的链接对象raddr地址
logging.info(client)
client.send(b"hello") #由于使用了connect方法,所以不指定终端也能发送
client.sendto(b"why",raddr) #也可以使用指定地址发送
data,radde = client.recvfrom(1024)
logging.info("{}-{}".format(radde,data))
client.close()
import logging
import sys
import socket
logging.basicConfig(format="%(asctime)s %(threadName)s %(thread)d %(message)s",stream=sys.stdout,level=logging.INFO)
client = socket.socket(type=socket.SOCK_DGRAM)
raddr = "127.0.0.1",3999
client.sendto(b"hello",raddr)
logging.info(client)
data,laddr = client.recvfrom(1024)
logging.info("{}-{}".format(data,laddr))
client.close()
方法 | 说明 |
---|---|
bind(laddr) | 可以指定本地地址和端口laddr,会立即占用,laddr为一个元组,(ip,prot) |
connect(raddr) | 会随机分配一个本地的端口laddr,会绑定远端地址和端口raddr,raddr是个元组,(ip,prot) |
sendto(msg,raddr) | 可以立即占用本地地址和端口laddr,并把数据发往指定远端。只有有了本地绑定的端口,sendto就可以向任何远端发送数据msg #要发送的数据。bytes类型。raddr#远端地址和端口组成的一个元组(ip,prot) |
send(msg) | 需要和connect方法配合,可以使用已经从本地端口把数据发往raddr指定的远端msg#需要发送的消息bytes类型 |
recv(buffersize) | 要求一定要在占用了本地端口后,返回接受的数据,buffersize指定一个缓冲区大小 |
recvfrom(buffersize) | 要求一定要占用了本地端口后,返回接收的数据和对端地址的二元组(msg,raddr)buffersize指定一个缓冲区大小。 |
""" author:xdd date:2019-06-17 09:20 """
import logging
import sys
import socket
import threading
import datetime
logging.basicConfig(format="%(asctime)s %(threadName)s %(thread)d %(message)s",stream=sys.stdout,level=logging.INFO)
class ChatUDPServer:
def __init__(self,ip="127.0.0.1",port=3999,timeout=10):
self.socket = socket.socket(type = socket.SOCK_DGRAM)
self.laddr = ip,port
self.event = threading.Event()
self.timeout = timeout
self.clients = {
}
def start(self):
socket = self.socket
socket.bind(self.laddr)
threading.Thread(target=self.run,name="run").start()
def run(self):
socket = self.socket
clients = self.clients
while not self.event.is_set():
try:
data,raddr = socket.recvfrom(1024)
except:
continue
utctime = datetime.datetime.now().timestamp()
if data.strip() == b"by": #如果用户自己发送by表示要退出
self.clients.pop(raddr)
continue
clients[raddr] = utctime
if data.strip() == b"^hh^": #如果是心跳,就忽略
continue
msg = "[{}] {}".format(raddr,data)
logging.info(msg)
outclient = [] #记录超时的链接地址
for cr,tm in clients.items():
if 0 <= utctime - tm <= self.timeout:
socket.sendto(msg.encode(),cr)
else:
outclient.append(cr)
for cr in outclient: #超时后删除
self.clients.pop(cr)
def stop(self):
try:
self.event.set()
self.socket.close()
finally:
self.clients.clear()
@classmethod
def main(cls):
chserver = cls()
chserver.start()
while True:
cmd = input(">>>>")
if cmd.strip() == "quit":
chserver.stop()
threading.Event().wait(1)
break
logging.info(threading.enumerate())
logging.info(chserver.clients)
ChatUDPServer.main()
""" author:xdd date:2019-06-17 10:26 """
import logging
import sys
import socket
import threading
logging.basicConfig(format="%(asctime)s %(thread)d %(threadName)s %(message)s",stream=sys.stdout,level=logging.INFO)
class UdpClient:
def __init__(self,ip="127.0.0.1",prost = 3999,heartbeattime = 5):
self.socket = socket.socket(type=socket.SOCK_DGRAM)
self.raddr = ip,prost
self.event = threading.Event()
self.heartbeattime = heartbeattime
def start(self):
self.socket.connect(self.raddr)
self.send("hello")
threading.Thread(target=self.heartbeat,name="heartbeat").start()
threading.Thread(target=self.run,name="client").start()
#发送心跳包,保持链接
def heartbeat(self):
while not self.event.wait(self.heartbeattime):
self.send("^hh^")
logging.info("心跳结束")
def run(self):
while not self.event.is_set():
try:
data,raddr = self.socket.recvfrom(1024)
except:
continue
logging.info("[ {} msg ] {}".format(raddr,data))
def send(self,msg):#发送消息
socket = self.socket
socket.send(msg.encode())
def stop(self):#停止
self.event.set()
self.socket.close()
@classmethod
def main(cls):
client = cls()
client.start()
while True:
cmd = input(">>>")
if cmd.strip() == "quit":
client.stop()
break
else:
client.send(cmd)
UdpClient.main()
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