Alessandro Roat added the comment:
This is an example, test it with netcat (nc -u localhost ) on linux (ubuntu
9.10).
Lauch it with python , a prompt will appear.
Type "start" to launch the server, test the server sending UDP packets with
netcat, the lenght of packet will be correctly printed.
However, when you'll type "stop" the close will be invoked but the receiving
thread wont stop and the join in the stop() wont never return and you will need
to kill the python interpreter.
import socket
import threading
import sys
import select
class UDPServer:
def __init__(self):
self.s=None
self.t=None
def start(self,port=):
if not self.s:
self.s=socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
self.s.bind(("",port))
self.t=threading.Thread(target=self.run)
self.t.start()
def stop(self):
if self.s:
self.s.close()
self.t.join()
self.t=None
def run(self):
while True:
try:
data,addr=self.s.recvfrom(1024)
print "recv done"
if len(data)<=0:
raise
self.onPacket(addr,data)
except:
break
#chiusura socket
print "server is no more running"
self.s=None
def onPacket(self,addr,data):
print len(data)
us=UDPServer()
while True:
sys.stdout.write("UDP server> ")
cmd=sys.stdin.readline()
if cmd=="start\n":
print "starting server..."
us.start()
print "done"
elif cmd=="stop\n":
print "stopping server..."
us.stop()
print "done"
elif cmd=="quit\n":
print "Quitting ..."
us.stop()
break;
print "bye bye"
--
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<http://bugs.python.org/issue8831>
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