c# – WebClient DownloadFile with Authorization not working – Stack Overflow

Доброго дня. Есть сайт первый и второй.
Нужно получить доступ к защищенному методу в первом, используя стандартный механизм авторизации форм.
WebClient на втором сайте делает запрос на авторизацию, отсылая имя/пароль, ему приходит кука, он ее сохраняет и посылает второй запрос на защищенный метод с кукой.
Во втором запросе видна AUTH кука и она валидна, но авторизация не проходит.

Request.isauthenticated = false

В чем может быть дело?

Код запросов вебклиента

    //Create an instance of your new CookieAware Web Client
var client = new CookieAwareWebClient();

//Authenticate (username and password can be either hard-coded or pulled from a settings area)
var values = new NameValueCollection { { "Name", "name" }, { "Password", "1234" } };

//Perform authentication - after this has been performed the cookie will be stored within the Web Client
client.UploadValues(new Uri("http://localhost:15536/Plugins/ProductListGetter/login"), "POST", values);
var _cookies = client.ResponseHeaders["Set-Cookie"];

client.UploadString(new Uri("http://localhost:15536/Plugins/ProductListGetter/ChangeNameForCurrentUser"), "POST", "Example Message");
client.UploadString(new Uri("http://localhost:15536/Plugins/ProductListGetter/ChangeNameForCurrentUser"), "POST", "Example Message");
client.Dispose();

Код модифицированного вебклиента для поддержки кук

public class CookieAwareWebClient : WebClient
{
    //Properties to handle implementing a timeout
    private int? _timeout = null;
    public int? Timeout
    {
        get
        {
            return _timeout;
        }
        set
        {
            _timeout = value;
        }
    }

    //A CookieContainer class to house the Cookie once it is contained within one of the Requests
    public CookieContainer CookieContainer { get; private set; }

    //Constructor
    public CookieAwareWebClient()
    {
        CookieContainer = new CookieContainer();
    }

    //Method to handle setting the optional timeout (in milliseconds)
    public void SetTimeout(int timeout)
    {
        _timeout = timeout;
    }

    //This handles using and storing the Cookie information as well as managing the Request timeout
    protected override WebRequest GetWebRequest(Uri address)
    {
        //Handles the CookieContainer
        var request = (HttpWebRequest)base.GetWebRequest(address);
        request.CookieContainer = CookieContainer;
        //Sets the Timeout if it exists
        if (_timeout.HasValue)
        {
            request.Timeout = _timeout.Value;
        }
        return request;
    }

I have tried just about everything I can think of to get this to work, including several things I’ve found online. All I’m trying to do is download a file (which has a direct link) from a website that I have to log in to.

I tried doing the following, with the “UploadValues”:

WebClient myWebClient = new WebClient();
NameValueCollection myNameValueCollection = new NameValueCollection();
myNameValueCollection.Add("username", this.UserName);
myNameValueCollection.Add("password", this.Password);
byte[] responseArray = myWebClient.UploadValues(felony, myNameValueCollection);
myWebClient.DownloadFile(felony, localfelony);

and I’ve also tried putting the login info in the headers as well. I’ve also tried just setting the credentials, as you can see from the commented code:

WebClient client = new WebClient();
//client.UseDefaultCredentials = false;
//client.Credentials = new NetworkCredential(this.UserName, this.Password);
client.Headers.Add(HttpRequestHeader.Authorization, "Basic "   Convert.ToBase64String(Encoding.ASCII.GetBytes(this.UserName   ":"   this.Password)));
client.Headers.Add(HttpRequestHeader.UserAgent, "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36");
//client.Headers.Add(HttpRequestHeader.Cookie, this.webBrowser.Document.Cookie);
client.DownloadFile(felony, localfelony);

No matter what I try, the only thing I can get it to download is a file that ends up being the login page, as if it didn’t accept the login info I passed.

I’ve looked at the headers and such, and I don’t see anything out of the ordinary that would explain why this isn’t working. Any ideas?