使用 Python 以编程方式检测 Windows XP 上的系统代理设置 [英] Programmatically detect system-proxy settings on Windows XP with Python

问题描述

我开发了一个跨国公司使用的关键应用程序.全球各地办公室的用户都需要能够安装此应用程序.

该应用程序实际上是 Excel 插件，我们有一个基于 Setuptools 的 easy_install 的自动安装程序，可确保在用户打开 Excel 时自动安装或更新项目的所有依赖项.这一切都非常优雅，因为用户很少意识到完全在后台进行的所有安装.

不幸的是，我们正在扩展和开设新的办公室，它们都有不同的代理设置.这些设置似乎每天都在变化，因此我们无法跟上那些在不告诉我们的情况下更改内容的外包安全人员.这很糟糕，但我们只需要解决它.

我想在我们的用户运行的 Windows 工作站上以编程方式检测系统范围的代理设置:

组织中的每个人都运行 Windows XP 和 Internet Explorer.我已经证实每个人都可以毫无问题地从 IE 下载我们的东西，无论他们身在何处.

所以我需要做的就是检测 IE 正在使用的代理设置并让 Setuptools 使用这些设置.理论上所有这些信息都应该在注册表中..但是有没有更好的方法来找到它保证不会随着人们升级IE而改变?例如，是否有可用于发现代理设置的 Windows API 调用?

总结:

• 我们在 Windows XP 上使用 Python 2.4.4
• 我们需要检测 Internet Explorer 代理设置(例如主机、端口和代理类型)
• 我将使用此信息动态重新配置easy_install，以便它可以通过代理下载egg 文件.

更新0:

我忘记了一个重要细节:每个站点都有一个自动配置的pac"文件.

在 Windows\CurrentVersion\InternetSettings\AutoConfigURL 中有一个键指向本地服务器上的 HTTP 文档，其中包含看起来像 javascript 文件的内容.

pac 脚本基本上是一系列嵌套的 if 语句，它们将 URL 与正则表达式进行比较，然后最终返回所选代理服务器的主机名.该脚本是一个名为 FindProxyForURL(url, host)

的 javascript 函数

因此，挑战在于为任何给定的服务器找出要使用的代理.唯一 100% 保证的方法是查找 pac 文件并从 Python 调用 Javascript 函数.

有什么建议吗?有没有更优雅的方法来做到这一点?

解决方案

据我所知，在 Windows 环境中，如果没有设置代理环境变量，代理设置是从注册表的 Internet 设置部分获取的..还不够吗?

或者你可以从注册表中获取一些有用的信息:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyServer

抱歉不知道如何格式化评论的源代码，我在这里重新发布.

<预><代码>>>>导入 win32com.client>>>js = win32com.client.Dispatch('MSScriptControl.ScriptControl')>>>js.Language = 'JavaScript'>>>js.AddCode('function add(a, b) {return a+b;}')>>>js.Run('添加', 1, 2)3

I develop a critical application used by a multi-national company. Users in offices all around the globe need to be able to install this application.

The application is actually a plugin to Excel and we have an automatic installer based on Setuptools' easy_install that ensures that all a project's dependancies are automatically installed or updated any time a user switches on their Excel. It all works very elegantly as users are seldom aware of all the installation which occurs entirely in the background.

Unfortunately we are expanding and opening new offices which all have different proxy settings. These settings seem to change from day to day so we cannot keep up with the outsourced security guys who change stuff without telling us. It sucks but we just have to work around it.

I want to programatically detect the system-wide proxy settings on the Windows workstations our users run:

Everybody in the organisazation runs Windows XP and Internet Explorer. I've verified that everybody can download our stuff from IE without problems regardless of where they are int the world.

So all I need to do is detect what proxy settings IE is using and make Setuptools use those settings. Theoretically all of this information should be in the Registry.. but is there a better way to find it that is guaranteed not to change with people upgrade IE? For example is there a Windows API call I can use to discover the proxy settings?

In summary:

• We use Python 2.4.4 on Windows XP
• We need to detect the Internet Explorer proxy settings (e.g. host, port and Proxy type)
• I'm going to use this information to dynamically re-configure easy_install so that it can download the egg files via the proxy.

UPDATE0:

I forgot one important detail: Each site has an auto-config "pac" file.

There's a key in Windows\CurrentVersion\InternetSettings\AutoConfigURL which points to a HTTP document on a local server which contains what looks like a javascript file.

The pac script is basically a series of nested if-statements which compare URLs against a regexp and then eventually return the hostname of the chosen proxy-server. The script is a single javascript function called FindProxyForURL(url, host)

The challenge is therefore to find out for any given server which proxy to use. The only 100% guaranteed way to do this is to look up the pac file and call the Javascript function from Python.

Any suggestions? Is there a more elegant way to do this?

解决方案

As far as I know, In a Windows environment, if no proxy environment variables are set, proxy settings are obtained from the registry's Internet Settings section. . Isn't it enough?

Or u can get something useful info from registry: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyServer

Edit:
sorry for don't know how to format comment's source code, I repost it here.

>>> import win32com.client
>>> js = win32com.client.Dispatch('MSScriptControl.ScriptControl')
>>> js.Language = 'JavaScript'
>>> js.AddCode('function add(a, b) {return a+b;}')
>>> js.Run('add', 1, 2)
3

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