WebRequest.GetResponse() = error (407) Proxy Authentication Required

[abiemann]

I'm following this example: http://www.geekpedia.com/tutorial179\_Creating-a-download-manager-in-Csharp.html it seems like a really straight-forward tutorial, however, the line "webResponse = (HttpWebResponse)webRequest.GetResponse();" always gives a (407) Proxy Authentication Required exception. What can I do to make my app pick up the same authentication that Internet Explorer uses ? Note: Internet Explorer LAN settings is set to: Checked "Use automatic configuration script" Address: http://xxxxxxxxxxxxxx.yyyyy.zzzzzzz.net/proxy.pac

[N a v a n e e t h]

Have a look at WebProxy[^] class. After you created the WebProxy instance, supply that to HttpWebRequest.Proxy[^] :)

Navaneeth How to use google | Ask smart questions

[abiemann]

GetDefaultProxy() sounds like a dream come true since I don't want the user to have to hassle with copy and pasting their proxy IP and port into my "settings" form. Additionally, I don't want the responsibility of storing their details in an encrypted file. However, GetDefaultProxy() is now antiquated. Also, using UseDefaultCredentials = true doesn't work. Is there an alternate solution to using GetDefaultProxy() ? Maybe reading the registry ?

[abiemann]

WebRequest.GetSystemWebProxy() doesn't work either. I still get the 407 error. i.e. webRequest = (HttpWebRequest)WebRequest.Create(strURL); webRequest.Credentials = CredentialCache.DefaultCredentials; IWebProxy wp = WebRequest.GetSystemWebProxy(); webRequest.Proxy = wp;

[abiemann]

through trial-and-error I finally got it solved. On my journey I've noticed that MANY people have problems with this, so no doubt this code will be copied plenty:

    public string GetWebPage(string strURL)
    {
        //stores the html returned by the server
        string strResult = "";

        //build the http request
        HttpWebRequest webRequest;
        webRequest = (HttpWebRequest)WebRequest.Create(strURL);

        IWebProxy proxy = WebRequest.GetSystemWebProxy();
        proxy.Credentials = CredentialCache.DefaultCredentials;

        webRequest.Proxy = proxy;
        webRequest.Method = "GET";
        webRequest.UserAgent = "Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+.NET+CLR+1.1.4322)";
        webRequest.Timeout = -1;

        //initiate contact with the server
        HttpWebResponse webResponse;
        webResponse = (HttpWebResponse)webRequest.GetResponse();

        //download the HTML
        using (StreamReader sr = new StreamReader(webResponse.GetResponseStream()))
        {
            //read the html
            strResult = sr.ReadToEnd();
            // Close and clean up the StreamReader
            sr.Close();
        }

        return strResult;
    }

[ishant7890]

this is also not working boss.M getting error

[ebjean]

Hi, not sure if you're still struggling with this. Maybe this could help... I was looking at a solution to call a web service from behind a company firewall, but I didn't want to code any proxy settings nor user credentials in my app. The app should simply use my default IE proxy settings. I'm using .Net 2.0 and here's the C# code to make it work. IWebProxy oProxy = WebRequest.GetSystemWebProxy(); oProxy.Credentials = (System.Net.NetworkCredential)CredentialCache.DefaultCredentials; "your WS stub".Proxy = oProxy; Hope this helps.

[eeidfn]

I get the Proxy Authentication only when using NUnit; the same code works fine when invoked in the real environment. Anyway, adding the following lines makes it work in NUnit: IWebProxy proxy = WebRequest.GetSystemWebProxy(); proxy.Credentials = (System.Net.NetworkCredential)CredentialCache.DefaultCredentials; request.Proxy = proxy;