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AuthenticationManager.PreAuthenticate(WebRequest, ICredentials) 方法

定義

警告

The AuthenticationManager Authenticate and PreAuthenticate methods are not supported and throw PlatformNotSupportedException.

預先驗證要求。

public:
 static System::Net::Authorization ^ PreAuthenticate(System::Net::WebRequest ^ request, System::Net::ICredentials ^ credentials);
[System.Obsolete("The AuthenticationManager Authenticate and PreAuthenticate methods are not supported and throw PlatformNotSupportedException.", DiagnosticId="SYSLIB0009", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public static System.Net.Authorization? PreAuthenticate (System.Net.WebRequest request, System.Net.ICredentials credentials);
public static System.Net.Authorization? PreAuthenticate (System.Net.WebRequest request, System.Net.ICredentials credentials);
public static System.Net.Authorization PreAuthenticate (System.Net.WebRequest request, System.Net.ICredentials credentials);
[<System.Obsolete("The AuthenticationManager Authenticate and PreAuthenticate methods are not supported and throw PlatformNotSupportedException.", DiagnosticId="SYSLIB0009", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
static member PreAuthenticate : System.Net.WebRequest * System.Net.ICredentials -> System.Net.Authorization
static member PreAuthenticate : System.Net.WebRequest * System.Net.ICredentials -> System.Net.Authorization
Public Shared Function PreAuthenticate (request As WebRequest, credentials As ICredentials) As Authorization

參數

request
WebRequest

對因特網資源的要求。

credentials
ICredentials

與要求相關聯的認證。

傳回

如果可以預先驗證要求,則為 Authorization 類別的執行個體,否則為 null。 如果 credentialsnull,這個方法會傳回 null

屬性

例外狀況

僅限 .NET Core 與 .NET 5+:在所有情況下。

requestnull

備註

如果驗證模組可以預先驗證要求,此方法會傳回驗證實例, PreAuthenticate 並將授權資訊預先傳送至伺服器,而不是等待資源發出挑戰。 此行為概述於 RFC 2617 (HTTP 驗證:基本和摘要式存取驗證) 一節 3.3。 支援預先驗證的驗證模組可讓用戶端避免驗證挑戰所造成的額外往返,以改善伺服器效率。

預先驗證要求的授權模組會將 IAuthenticationModule.CanPreAuthenticate 屬性設定為 true

適用於