C# HttpWebRequest - PreAuthenticate：仍然返回 401 禁止 (HTTPS)

Question

我想就我快速編寫的以下代碼向您尋求幫助，因為我總是得到“403 FORBIDDEN”。

HttpWebRequest pozadavek = (HttpWebRequest)WebRequest.Create("LINK THAT ASKS FOR AUTHLOGIN"); //https
    System.IO.StreamReader stream = null;
    System.String result = null;
    public Form1()
    {
        InitializeComponent();
        pozadavek.AuthenticationLevel = System.Net.Security.AuthenticationLevel.MutualAuthRequested;
        pozadavek.Credentials = new NetworkCredential("NAME", "PASS");
        pozadavek.PreAuthenticate = true;
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        WebResponse webresponse = pozadavek.GetResponse(); //throws an exception:403 forbidden
        stream = new System.IO.StreamReader(webresponse.GetResponseStream());
        result = stream.ReadToEnd();
        this.webBrowser1.DocumentText = result;
    }

Answer 1

您嘗試打開的站點需要基本身份驗證。 底線是，您需要在請求中包含 base64 編碼的用戶名/密碼。 幸運的是，.Net 可以為您做到這一點。 像這樣構建您的請求：

var credCache = new CredentialCache();
credCache.Add(new Uri("https://is.vsfs.cz/auth"), "Basic",
                  new NetworkCredential("user", "pwd"));
var request = (HttpWebRequest)WebRequest.Create(uri);
request.Credentials = credCache;

這是一篇文章，更詳細地解釋了 .Net 中如何處理各種身份驗證方案。

Answer 2

此代碼適用於 4 我...

Uri address = new Uri("https://www.example.com");
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(address);
string authInfo = username + ":" +password;
authInfo = Convert.ToBase64String(Encoding.UTF8.GetBytes(authInfo));
request.Headers.Add("Authorization", "Basic " + authInfo);
NetworkCredential myCreds = new NetworkCredential(username, password);
request.Credentials = myCreds;
request.Method = WebRequestMethods.Http.Get;
request.AllowAutoRedirect = true;
request.Proxy = null;