(407)需要代理验证

Question

我知道这已被问过很多次了.我已经阅读了这里的大部分帖子和其他类似的网站.

http://social.msdn.microsoft.com/Forums/en-US/ncl/thread/2931d21c-9ca8-4256-b213-915fad4c941b/

无济于事.这是环境

Windows Server 2008 R2 64位Visual Studio 2008 .Net Framework 3.5

这是我尝试过的

我使用代码进行了代理身份验证

WebRequest req = WebRequest.Create(requestUri + data);
req.Proxy = new System.Net.WebProxy(<ProxyURL>:<port>",true);
req.Proxy.Credentials = CredentialCache.DefaultCredentials;
WebResponse resp = req.GetResponse();

这工作,但看到它减慢了应用程序,我了解到我可以编辑我所做的machine.config文件.它也有效!

    <system.net>
      <defaultProxy
      useDefaultCredentials="true">
      <proxy
        proxyaddress="<proxyURL>:<port>"
        bypassonlocal="True"/>
     </defaultProxy>
   </system.net>

至少一天或2.然后它开始失败.

然后我把它编辑成这个

    <system.net>
     <defaultProxy
       useDefaultCredentials="true">
       <proxy usesystemdefault="True"/>
       </defaultProxy>
    </system.net>

根据我的理解,这将使用IE设置连接到代理但仍然无法正常工作.我也尝试过代码

WebProxy proxy = new WebProxy(<proxy>:<port>);
CredentialCache myCache = new CredentialCache();
myCache.Add(new Uri(requestUri + data), "BASIC", new NetworkCredential(<username>,<password>));
proxy.Credentials = myCache;
request.Proxy = proxy;
request.Method = "GET";

这没用.

注意:我可以将machine.config文件复制到我的计算机(Win XP)并从那里运行.exe(没有代理代码),它工作正常.

我需要对64位操作系统有什么不同吗？我也可以在服务器上打开IE8并访问URI就好了.目标是预先验证代理,而无需在代码中提供用户名密码.

Answer 1

@David Moore是对的.如果IE在您手动浏览时工作正常,那么只需添加即可req.Proxy.Credentials = CredentialCache.DefaultCredentials;正常工作.

下面是从MSDN中获取的修改后的代码,它正在为我工​​作.

using System;
using System.Diagnostics;
using System.IO;
using System.Net;

namespace ConsoleApplication4
{
    class Program
    {
        static void Main(string[] args)
        {
            string urlDemo = "http://en.wikipedia.org/wiki/Main_Page";
            // Create a request for the URL. 
            WebRequest request = WebRequest.Create(urlDemo);
            // If required by the server, set the proxy credentials.
            request.Proxy.Credentials = CredentialCache.DefaultCredentials;
            // Get the response.
            WebResponse response = request.GetResponse();
            // Display the status.
            Console.WriteLine(((HttpWebResponse)response).StatusDescription);
            // Get the stream containing content returned by the server.
            Stream dataStream = response.GetResponseStream();
            // Open the stream using a StreamReader for easy access.
            StreamReader reader = new StreamReader(dataStream);
            // Read the content.
            string responseFromServer = reader.ReadToEnd();
            // Display the content.
            Console.WriteLine(responseFromServer);
            Console.ReadLine();
            // Clean up the streams and the response.
            reader.Close();
            response.Close();

        }
    }
}

希望能帮助到你 ;-)