[Tutor] Threading and Sockets

Wayne Werner waynejwerner at gmail.com
Mon Nov 15 16:16:30 CET 2010


I'm working on creating a server/client bit of software using threading and
sockets (it's a project so I can't use something like twisted), and I've run
into a slight issue with my server. My server currently looks like this:

class ClientThread(threading.Thread):
    def __init__(self, socketdata, server):
        self.conn = socketdata[0]
        self.details = socketdata[1]
        self.server = server

    def run(self):
        ''' Method called when the Thread.start() method is called. '''
        global CONNCOUNT
        CONNCOUNT -= 1
        print("Getting data from {0}:{1}: ".format(self.details[0],
                                                 self.details[1]), end='')
        data = self.conn.recv(1024)
        if data == 'quit':

class Server(threading.Thread):
    def __init__(self, port=1500, max_connections=5):
        ''' Setup the server elements. '''

        self.server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.server.bind(('localhost', 1500))
        self.keeprunning = True

    def run(self):
        global CONNCOUNT
        while self.keeprunning:#CONNCOUNT > 1:
            ClientThread(self.server.accept(), self).start()

    def stop(self):
        ''' Stop the server. '''

        print("Stopping server... maybe...")
        self.keeprunning = False
        # Close the socket connection
        print("Server stopped.")

(CONNCOUNT is currently not used - I was using it to stop my server)

My issue is that when I send 'quit' the server does (sort of) close, but (I
think) the self.server.accept() is blocking, so until I try connecting a few
more times, the server doesn't actually finish.

So that's really my only question - how do I make my server completely stop
when I'm done? Pointing me towards documentation would be perfectly fine,
preferably with a hint about which function(s) I should look at.

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