AuthenticationSchemeSelector 代理人

定義

命名空間:

System.Net

組件:

System.Net.HttpListener.dll

選取 HttpListener 執行個體的驗證配置。

public delegate System::Net::AuthenticationSchemes AuthenticationSchemeSelector(HttpListenerRequest ^ httpRequest);

public delegate System.Net.AuthenticationSchemes AuthenticationSchemeSelector(HttpListenerRequest httpRequest);

type AuthenticationSchemeSelector = delegate of HttpListenerRequest -> AuthenticationSchemes

Public Delegate Function AuthenticationSchemeSelector(httpRequest As HttpListenerRequest) As AuthenticationSchemes 

參數

httpRequest

HttpListenerRequest

要選取驗證配置的 HttpListenerRequest 執行個體。

傳回值

AuthenticationSchemes

其中一個 AuthenticationSchemes 值，指出要用於指定用戶端要求的驗證方法。

範例

下列範例會使用這個類型的實例來設定 AuthenticationSchemeSelectorDelegate 屬性。

// Set up a listener.
HttpListener listener = new HttpListener();
HttpListenerPrefixCollection prefixes = listener.Prefixes;
prefixes.Add(@"http://localhost:8080/");
prefixes.Add(@"http://contoso.com:8080/");

// Specify the authentication delegate.
listener.AuthenticationSchemeSelectorDelegate =
    new AuthenticationSchemeSelector (AuthenticationSchemeForClient);

// Start listening for requests and process them
// synchronously.
listener.Start();

' Set up a listener.
Dim listener As New HttpListener()
Dim prefixes As HttpListenerPrefixCollection = listener.Prefixes
prefixes.Add("http://localhost:8080/")
prefixes.Add("http://contoso.com:8080/")

' Specify the authentication delegate.
listener.AuthenticationSchemeSelectorDelegate = New AuthenticationSchemeSelector(AddressOf AuthenticationSchemeForClient)

' Start listening for requests and process them 
' synchronously.
listener.Start()

下列範例顯示上一個範例中委派叫用 AuthenticationSchemeSelector 的方法實作。

static AuthenticationSchemes AuthenticationSchemeForClient(HttpListenerRequest request)
{
    Console.WriteLine("Client authentication protocol selection in progress...");
    // Do not authenticate local machine requests.
    if (request.RemoteEndPoint.Address.Equals (IPAddress.Loopback))
    {
        return AuthenticationSchemes.None;
    }
    else
    {
        return AuthenticationSchemes.IntegratedWindowsAuthentication;
    }
}

Private Shared Function AuthenticationSchemeForClient(ByVal request As HttpListenerRequest) As AuthenticationSchemes
    Console.WriteLine("Client authentication protocol selection in progress...")
    ' Do not authenticate local machine requests.
    If request.RemoteEndPoint.Address.Equals(IPAddress.Loopback) Then
        Return AuthenticationSchemes.None
    Else
        Return AuthenticationSchemes.IntegratedWindowsAuthentication
    End If
End Function

備註

實例會使用此 HttpListener 類型的委派，根據要求的特性來選取驗證配置。

AuthenticationSchemeSelector委派會針對未提供驗證資訊的每個傳入要求傳遞HttpListenerRequest物件。 委派叫用的方法會 HttpListenerRequest 使用 物件和任何其他可用信息來決定需要哪一個驗證配置。 委派是使用 AuthenticationSchemeSelectorDelegate 屬性來指定。

擴充方法

GetMethodInfo(Delegate)

取得表示特定委派所代表之方法的物件。