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POPython SocketServer passing data to the main thread via Thread local storage
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  1. POPython SocketServer passing data to the main thread via Thread local storage
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    copied!<p>Sorry if this question is too basic - this is the first time that I try using multithreaded sockets in Python.</p> <p>Basically, I'm trying to write code that gets data that's being received by a UDPServer socket; the socket itself is running inside of a thread. <del>In order to make the data accessible to the main thread, I'm using Thread local storage (it seems that's the correct way to do it based on everything that I read)</del>. The code below is my first attempt to make it work, but the variable doesn't seem to be properly updated. Any idea about what could be happening?</p> <p>EDIT: see below for a working example</p> <p>Server:</p> <pre><code>import socket import threading import SocketServer data = threading.local() class UDPHandler(SocketServer.BaseRequestHandler): def handle(self): data.outputString = self.request[0].strip() class ThreadedUDPServer(SocketServer.ThreadingMixIn, SocketServer.UDPServer): def __init__(self, serverAddress, handlerClass): SocketServer.UDPServer.__init__(self, serverAddress, handlerClass) data.outputString = "" if __name__ == "__main__": ReceiverSocket = ThreadedUDPServer(("localhost",11111), UDPHandler) ServerThread = threading.Thread(target=ReceiverSocket.serve_forever) ServerThread.daemon = True ServerThread.start() while 1: if data.outputString: print data.outputString data.outputString = "" </code></pre> <p>Client:</p> <pre><code>import socket import sys HOST, PORT = "localhost", 11111 data = " ".join(sys.argv[1:]) sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.sendto(data + "\n", (HOST, PORT)) </code></pre> <p>Thanks!!</p>
 

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