python win32api阻塞瓶路线 [英] python win32api blocking bottle routes

问题描述

我有一个Bottle Web应用程序。在某个时候，我希望服务器引发一个对话框，要求服务器管理员提供某些信息。即使从 Thread 启动，此警报也会阻止-我真的不明白为什么。

I have a bottle web application. At some point, i want the server to raise a dialog window to ask the server admin for something. This alert, even when started from a Thread is blocking - And i don't really understand why.

要查看此ctypes MessageBox是否被阻止，我尝试在一个最小的示例上在线程上运行它。我已经尝试过以下示例：

To see if this ctypes MessageBox is blocking, i've tried to run it on a thread on a minimal example. I've tried this example:

import threading
from threading import Thread
import ctypes
import time
MessageBox = ctypes.windll.user32.MessageBoxA

def alert():
    userChoice = MessageBox(0, "And this is crazy", "Hey I just met you",4)
    threading.Timer(3.0,alert).start()

worker = Thread(target=alert)
worker.setDaemon(False)
worker.start()

while (True):
    print("main thread is printing")
    time.sleep(2)

这里，主线程每隔2秒继续打印一次。同时，每3秒显示一次从线程启动的警报方法。我们清楚地看到，循环不是在等待对话框返回值。

Here, the main thread keeps on printing on 2 seconds interval. Concurrently, each 3 seconds the alert method started from a thread is shown. We clearly see that the loop isn't waiting for the dialog to return a value.

尽管从瓶子应用程序尝试类似代码时，此测试一直到是。或在对话框上单击否，则服务器不响应其路由。而是等待对话框返回一个值，这意味着该对话框在某种程度上阻止了执行。

Despite this test, when trying similar code from a bottle application, until 'Yes' or 'No' is clicked on the dialog, the server does not respond to it's routes. Instead, it waits for the dialog to return a value, which means the dialog is blocking execution at some level.

任何人都知道如何在不影响瓶装工作的情况下引发对话框。 ？我的想法不多了。感谢您的时间和精力。

Anyone knows how to raise a dialog without interfering with bottle work? I'm running out of ideas. Appreciate your time and effort.

更新：

这不是问题。瓶子确实在没有干扰的情况下运行。在这里可以更好地描述实际问题： bottle gevent和线程：gevent仅可用于单个线程

推荐答案

您可能会在您的Bottle应用程序中使用Gevent 。如果您选择monkey.patch_all（），则您的线程将变为串行线程，并会阻止执行瓶。

You probably use Gevent with your bottle application . If you monkey.patch_all() , your threads become serial , and will block bottle execution .

您不应该修补线程：

from gevent import monkey
monkey.patch_all(thread=False)

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