C# IAuthenticationRequest.IsReturnUrlDiscoverableAsync方法代码示例

		/// <summary>
		/// Processes an authentication request by a popup window.
		/// </summary>
		/// <param name="userIdentityPageBase">The base URI upon which user identity pages are created.</param>
		/// <param name="request">The incoming authentication request.</param>
		/// <param name="cancellationToken">The cancellation token.</param>
		/// <returns>
		/// A task that completes with the asynchronous operation.
		/// </returns>
		internal static async Task ProcessAuthenticationAsync(Uri userIdentityPageBase, IAuthenticationRequest request, CancellationToken cancellationToken) {
			Requires.NotNull(userIdentityPageBase, "userIdentityPageBase");
			Requires.NotNull(request, "request");

			var window = new CheckIdWindow(userIdentityPageBase, request);

			IHostFactories hostFactories = new DefaultOpenIdHostFactories();
			bool isRPDiscoverable = await request.IsReturnUrlDiscoverableAsync(hostFactories, cancellationToken) == RelyingPartyDiscoveryResult.Success;
			window.discoverableYesLabel.Visibility = isRPDiscoverable ? Visibility.Visible : Visibility.Collapsed;
			window.discoverableNoLabel.Visibility = isRPDiscoverable ? Visibility.Collapsed : Visibility.Visible;

			bool? result = window.ShowDialog();

			// If the user pressed Esc or cancel, just send a negative assertion.
			if (!result.HasValue || !result.Value) {
				request.IsAuthenticated = false;
				return;
			}

			request.IsAuthenticated = window.tabControl1.SelectedItem == window.positiveTab;
			if (request.IsAuthenticated.Value) {
				request.ClaimedIdentifier = window.claimedIdentifierBox.Text;
				request.LocalIdentifier = window.localIdentifierBox.Text;
			}
		}

		internal static async Task ProcessAuthenticationChallengeAsync(IAuthenticationRequest idrequest, CancellationToken cancellationToken) {
			// Verify that RP discovery is successful.
			var providerEndpoint = new ProviderEndpoint();
			if (await idrequest.IsReturnUrlDiscoverableAsync(providerEndpoint.Provider.Channel.HostFactories, cancellationToken) != RelyingPartyDiscoveryResult.Success) {
				idrequest.IsAuthenticated = false;
				return;
			}

			// Verify that the RP is on the whitelist.  Realms are case sensitive.
			string[] whitelist = ConfigurationManager.AppSettings["whitelistedRealms"].Split(';');
			if (Array.IndexOf(whitelist, idrequest.Realm.ToString()) < 0) {
				idrequest.IsAuthenticated = false;
				return;
			}

			if (idrequest.IsDirectedIdentity) {
				if (HttpContext.Current.User.Identity.IsAuthenticated) {
					idrequest.LocalIdentifier = Util.BuildIdentityUrl();
					idrequest.IsAuthenticated = true;
				} else {
					// If the RP demands an immediate answer, or if we're using implicit authentication
					// and therefore have nothing further to ask the user, just reject the authentication.
					if (idrequest.Immediate || ImplicitAuth) {
						idrequest.IsAuthenticated = false;
					} else {
						// Send the user to a page to actually log into the OP.
						if (!HttpContext.Current.Request.Path.EndsWith("Login.aspx", StringComparison.OrdinalIgnoreCase)) {
							HttpContext.Current.Response.Redirect("~/Login.aspx");
						}
					}
				}
			} else {
				string userOwningOpenIdUrl = Util.ExtractUserName(idrequest.LocalIdentifier);

				// NOTE: in a production provider site, you may want to only 
				// respond affirmatively if the user has already authorized this consumer
				// to know the answer.
				idrequest.IsAuthenticated = userOwningOpenIdUrl == HttpContext.Current.User.Identity.Name;

				if (!idrequest.IsAuthenticated.Value && !ImplicitAuth && !idrequest.Immediate) {
					// Send the user to a page to actually log into the OP.
					if (!HttpContext.Current.Request.Path.EndsWith("Login.aspx", StringComparison.OrdinalIgnoreCase)) {
						HttpContext.Current.Response.Redirect("~/Login.aspx");
					}
				}
			}

			if (idrequest.IsAuthenticated.Value) {
				// add extension responses here.
				var fetchRequest = idrequest.GetExtension<FetchRequest>();
				if (fetchRequest != null) {
					var fetchResponse = new FetchResponse();
					if (fetchRequest.Attributes.Contains(RolesAttribute)) {
						// Inform the RP what roles this user should fill
						// These roles would normally come out of the user database
						// or Windows security groups.
						fetchResponse.Attributes.Add(RolesAttribute, "Member", "Admin");
					}
					idrequest.AddResponseExtension(fetchResponse);
				}
			}
		}