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POPython Access to BaseRequestHandler
 

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  1. POPython Access to BaseRequestHandler
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    <p>My code basically needs to start up a simple chat server with a client. Where the server and the client can talk back and forth to each other. I've gotten everything to be implemented correctly, but I can't figure out how to shut down the server whenever I'm done. (I know it's <code>ss.shutdown()</code>). </p> <p>I'm wanting to end right now based on a keyword shared between the two (something like <code>"bye"</code>), but I don't know if I can somehow send a message to my <code>SocketServer</code> from <code>BaseRequestHandler</code> to <code>shutdown()</code> whenever it receives the message.</p> <p>Eventually, my goal is to incorporate <code>Tkinter</code> to make a GUI, but I wanted to get everything else to work first, and this is my first time dealing with sockets in Python.</p> <pre><code>from sys import argv, stderr from threading import Thread import socket import SocketServer import threading import sys class ThreadedRecv(Thread): def __init__(self,socket): Thread.__init__(self) self.__socket = socket self.__message = '' self.__done = False def recv(self): while self.__message.strip() != "bye" and not self.getStatus(): self.__message = self.__socket.recv(4096) print 'received',self.__message self.setStatus(True) def run(self): self.recv() def setStatus(self,status): self.__done = status def getStatus(self): return self.__done class ThreadedSend(Thread): def __init__(self,socket): Thread.__init__(self) self.__socket = socket self.__message = '' self.__done = False def send(self): while self.__message != "bye" and not self.getStatus(): self.__message = raw_input() self.__socket.send(self.__message) self.setStatus(True) def run(self): self.send() def setStatus(self,status): self.__done = status def getStatus(self): return self.__done class HostException(Exception): def __init__(self, value): self.value = value def __str__(self): return repr(self.value) class EchoServer(SocketServer.BaseRequestHandler): def setup(self): print self.client_address, 'is connected!' self.request.send('Hello ' + str(self.client_address) + '\n') self.__done = False def handle(self): sender = ThreadedSend(self.request) recver = ThreadedRecv(self.request) sender.start() recver.start() while 1: if recver.getStatus(): sender.setStatus(True) break if sender.getStatus(): recver.setStatus(True) break def finish(self): print self.client_address, 'disconnected' self.request.send('bye client %s\n' % str(self.client_address)) self.setDone(True) def setDone(self,done): self.__done = done def getDone(self): return self.__done def setup(arg1, arg2, arg3): server = False defaultPort,defaultHost = 2358,"localhost" hosts = [] port = defaultPort serverNames = ["TRUE","SERVER","S","YES"] arg1 = arg1.upper() arg2 = arg2.upper() arg3 = arg3.upper() if arg1 in serverNames or arg2 in serverNames or arg3 in serverNames: server = True try: port = int(arg1) if arg2 != '': hosts.append(arg2) except ValueError: if arg1 != '': hosts.append(arg1) try: port = int(arg2) if arg3 != '': hosts.append(arg3) except ValueError: if arg2 != '': hosts.append(arg2) try: port = int(arg3) except ValueError: if arg3 != '': hosts.append(arg3) port = defaultPort for sn in serverNames: if sn in hosts: hosts.remove(sn) try: if len(hosts) != 1: raise HostException("Either more than one or no host "+ \ "declared. Setting host to localhost.") except HostException as error: print error.value, "Setting hosts to default" return (server,defaultHost,port) return (server,hosts[0].lower(),port) def main(): bufsize = 4096 while len(argv[1:4]) &lt; 3: argv.append('') settings = setup(*argv[1:4]) connections = (settings[1],settings[2]) print connections if not settings[0]: try: mySocket = socket.socket(socket.AF_INET,\ socket.SOCK_STREAM) except socket.error, msg: stderr.write("[ERROR] %s\n" % msg[1]) sys.exit(1) try: mySocket.connect(connections) except socket.error, msg: stderr.write("[ERROR] %s\n" % msg[1]) sys.exit(2) message = "" print "Enter a message to send to the server. "+\ "Enter \"bye\" to quit." sender = ThreadedSend(mySocket) recver = ThreadedRecv(mySocket) sender.start() recver.start() while 1: if sender.getStatus(): recver.setStatus(True) break if recver.getStatus(): sender.setStatus(True) break else: xserverhandler = EchoServer serversocket = SocketServer.ThreadedTCPServer(\ connections,xserverhandler) server_thread = Thread(target = serversocket.serve_forever) server_thread.setDaemon(True) server_thread.start() # I would like to shut down this server whenever # I get done talking to it. """while 1: if xserverhandler.getDone(): print 'This is now true!' serversocket.shutdown() break""" if __name__ == '__main__': main() </code></pre> <p>Yeah, I know setup() is a terrible function right now with the try's and catches, but it works for now, so I was going to fix it later.</p> <p>My question is basically: How can I get the server to actually end based on a message that it receives? If possible, is there a way to access the Request Handler after it's started?</p>
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