我正在使用https://github.com/Azure-Samples/active-directory-b2c-dotnet-webapp-and-webapi中的示例代码。当我收到授权代码时，回调方法\中的方法ConfidentialClientApplication.AcquireTokenByAuthorizationCodeAsync会抛出异常：
OnAuthorizationCodeReceived
以下是示例代码的片段：
System.Runtime.Serialization.SerializationException: There was an error deserializing the object of type Microsoft.Identity.Client.Internal.OAuth2.TokenResponse. Encountered unexpected character '<'.答案 0 :(得分：2)
问题在于，传递给/*
* Callback function when an authorization code is received
*/
private async Task OnAuthorizationCodeReceived(AuthorizationCodeReceivedNotification notification)
{
// Extract the code from the response notification
var code = notification.Code;
string signedInUserID = notification.AuthenticationTicket.Identity.FindFirst(ClaimTypes.NameIdentifier).Value;
TokenCache userTokenCache = new MSALSessionCache(signedInUserID, notification.OwinContext.Environment["System.Web.HttpContextBase"] as HttpContextBase).GetMsalCacheInstance();
ConfidentialClientApplication cca = new ConfidentialClientApplication(ClientId, Authority, RedirectUri, new ClientCredential(ClientSecret), userTokenCache, null);
try
{
AuthenticationResult result = await cca.AcquireTokenByAuthorizationCodeAsync(code, Scopes);
}
catch (Exception ex)
{
//TODO: Handle
throw;
}
}
的{{1}}网址无效，并且返回了HTTP 404未找到错误。 Authority网址是使用ConfidentialClientApplication和Authority值创建的。在我的情况下，Tenant和DefaultPolicy属性在Tenant属性之后被初始化，导致URL不包含正确的值。
DefaultPolicy这导致Authority网址具有以下值：
public static string Authority = String.Format(AadInstance, Tenant, DefaultPolicy);
...
public static string Tenant = ConfigurationManager.AppSettings["ida:Tenant"];
public static string DefaultPolicy = SignUpSignInPolicyId;
vs
Authority
在我最初的搜索过程中，我发现了这个问题 https://github.com/AzureAD/azure-activedirectory-library-for-dotnet/issues/720但没有解决方案。我已经在那里发布了我的答案，以帮助将来的任何人。