Python SocketServer 通过线程本地存储将数据传递到主线程

Question

抱歉，如果这个问题太基础了 - 这是我第一次尝试在 Python 中使用多线程套接字。

基本上，我正在尝试编写代码来获取 UDPServer 套接字接收的数据；套接字本身在线程内运行。 为了使主线程可以访问数据，我使用了线程本地存储(根据我读到的所有内容，这似乎是正确的方法)。下面的代码是我第一次尝试使其工作，但变量似乎没有正确更新。知道会发生什么吗？

编辑:请参阅下面的工作示例

服务器:

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 = ""

客户:

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))

谢谢!!

Answer 1

成功了。是的 - 线程本地与此无关...:)

我设置了一个全局变量，并在每个修改它的函数中将其定义为全局变量(按照 this very helpful answer )

import socket
import threading
import SocketServer

data = ""

class UDPHandler(SocketServer.BaseRequestHandler):

    def handle(self):
        global data
        data = self.request[0].strip()

class ThreadedUDPServer(SocketServer.ThreadingMixIn, SocketServer.UDPServer):
    pass

if __name__ == "__main__":

    ReceiverSocket = ThreadedUDPServer(("localhost",11111), UDPHandler)
    ServerThread = threading.Thread(target=ReceiverSocket.serve_forever)
    ServerThread.start()

    while 1:
        if data:
            print data
            data = ""