Python3将队列传递给多线程HTTP服务器类

时间:2017-05-21 06:06:57

标签: python-3.x queue basehttprequesthandler

我将是第一个承认我仍然相对较新的Python的人。这个板子有很多帮助...

我正在开发一个项目,我正在使用多线程HTTP服务器,我需要将信号发送回主循环。我试图以此为基础:Passing a Queue to ThreadedHTTPServer

以下是我目前正在做的摘录(在Python 3.4中):

if __name__ == '__main__':
    ...
    q1 = Queue(maxsize=0)

    ...
    remote_http_thread = threading.Thread(target=remote_threader, args=(q1))
    remote_http_thread.daemon = True
    remote_http_thread.start()
    ...


    while 1:
        time.sleep(1)
        try:
            my_message = q1.get_nowait()
            message_flag = 1
            print("GOT THE FOLLOWING QUEUE MESSAGE :", my_message)
        except:
            message flag = 0
        ...

以下是另一个文件(我的HTTP服务器代码):

def remote_threader(qit):
    remote_Server = ThreadedHTTPServer(("", 35677), P_Server)
    remote_Server.qu = qit
    remote_Server.serve_forever()

class ThreadedHTTPServer(ThreadingMixIn, HTTPServer):
    """Handle requests in a separate thread."""

class P_Server(BaseHTTPRequestHandler):
    def __init__(self, request, client_address, server):
    BaseHTTPRequestHandler.__init__(self, request, client_address, server)
    self.qu = server.qu # save the queue here.

    def go_GET(self):
        ...
        #  We have an event that we want to signal back to the main loop
        self.qu.put("Event")

HTTP服务器工作正常,我现在正试图将消息传递回主循环,以便某些事件导致事情发生。运行上面的代码导致P_Server没有属性'qu'

的异常

从测试中可以看出,我在 init 步骤中创建的任何属性(甚至是硬编码的数字或字符串)在“do_GET”部分中都不可用。

任何人都可以让我知道我在这里做错了什么,我可以更改它,以便主要部分将消息放入HTTP服务器类的队列中?

1 个答案:

答案 0 :(得分:1)

尝试在调用

之前设置属性
BaseHTTPRequestHandler.__init__()

所以代码变成......

def remote_threader(qit):
    remote_Server = ThreadedHTTPServer(("", 35677), P_Server)
    remote_Server.qu = qit
    remote_Server.serve_forever()

class ThreadedHTTPServer(ThreadingMixIn, HTTPServer):
    """Handle requests in a separate thread."""

class P_Server(BaseHTTPRequestHandler):
    def __init__(self, request, client_address, server):
        # THE ATTRIBUTE IS SET HERE
        self.qu = server.qu # save the queue here.
        # super's init called after setting attribute
        BaseHTTPRequestHandler.__init__(self, request, client_address, server)

    def go_GET(self):
        ...
        #  Accessed in GET
        self.qu.put("Event")

当我在调用BaseHttpRequestHandler的init之前设置属性时,为我工作