在 .Net 中使用 IE 设置中的代理自动配置

问题描述

我无法使用 .Net WebRequest 使 IE 选项中的代理自动配置 (PAC) 按预期工作.

I'm having trouble getting Proxy Automatic Configuration (PAC) in IE options to work as expected using .Net WebRequest.

根据这篇文章:
代理检测通过 .NET 中的自动配置减轻用户的负担

默认情况下应为每个 WebRequest 设置系统代理.

The system proxy should be set by default with to each WebRequest.

proxy.js pac 文件是这样的:

That's how the proxy.js pac file looks like:

function FindProxyForURL(url, host)
{
  return "PROXY ProxyServerName:3118; DIRECT;";
}

我也看了这个帖子:我应该如何设置默认代理以使用默认凭据?

建议在 app.config 中添加:

Which suggests to add this in the app.config:

<system.net>
  <defaultProxy useDefaultCredentials="true" />
</system.net>

添加这个没有帮助.

我创建了一个小的控制台应用程序只是为了测试这个......它是:

I created a small console application just to test this out.. here it is:

static void Main(string[] args)
{
    HttpWebRequest request = null;
    try
    {
        String resolvedAddress = WebRequest.DefaultWebProxy.GetProxy(new Uri("http://www.google.com")).ToString();
        Console.WriteLine("Proxy for address is: " + resolvedAddress);

        Uri m_URLToTest = new Uri("http://www.google.com");
        request = WebRequest.Create(m_URLToTest) as HttpWebRequest;
        request.Method = "GET";
        request.KeepAlive = false;
        request.Timeout = 5000;
        request.Proxy = WebRequest.DefaultWebProxy;
        WebResponse response = request.GetResponse();
        StreamReader reader = new StreamReader(response.GetResponseStream());
        string message = reader.ReadToEnd();
    }
    catch (Exception ex)
    {
        Console.Write("Exception");
    }

}

输出:地址的代理是 http://www.google.com

代替地址的代理是 ProxyServerName:3118

instead of Proxy for address is ProxyServerName:3118

仅在使用自动配置脚本时发生...

It happens only when using auto configuration script...

我错过了什么吗?请帮忙！

Did I miss anything? Please help!

推荐答案

找到解决方案！

PAC 文件的 MIME 类型为:[Content-type: application/x-ns-proxy-autoconfig]

It is really important that the mime type of the PAC file would be: [Content-type: application/x-ns-proxy-autoconfig]

其他 mime 类型可能不起作用.

Other mime types might not work.

确保使用 fiddler2(禁用缓存)mime 类型是合适的.某些配置可能会显示 Content-Type: text/plain 这很糟糕.

Make sure using fiddler2 (with cache disabled) that the mime type is appropriate.Some configurations might show Content-Type: text/plain which is bad.

这篇关于在 .Net 中使用 IE 设置中的代理自动配置的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！