Add Alibaba Cloud (Aliyun) to the list of supported providers

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Discovery.cs

@@ -108,8 +108,9 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                 // types is amended to include the known supported types for the providers that require it.
 
                 if (context.Registration.ProviderType is
-                    ProviderTypes.Apple    or ProviderTypes.FaceIt or
-                    ProviderTypes.LinkedIn or ProviderTypes.QuickBooksOnline)
+                    ProviderTypes.AlibabaCloud or ProviderTypes.Apple    or
+                    ProviderTypes.FaceIt       or ProviderTypes.LinkedIn or
+                    ProviderTypes.QuickBooksOnline)
                 {
                     context.Configuration.GrantTypesSupported.Add(GrantTypes.AuthorizationCode);
                     context.Configuration.GrantTypesSupported.Add(GrantTypes.RefreshToken);
@@ -250,7 +251,8 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                 // While it is a recommended node, these providers don't include "scopes_supported" in their
                 // configuration and thus are treated as OAuth 2.0-only providers by the OpenIddict client.
                 // To avoid that, the "openid" scope is manually added to indicate OpenID Connect is supported.
-                else if (context.Registration.ProviderType is ProviderTypes.EpicGames or ProviderTypes.Xero or ProviderTypes.EveOnline)
+                else if (context.Registration.ProviderType is
+                    ProviderTypes.EpicGames or ProviderTypes.EveOnline or ProviderTypes.Xero)
                 {
                     context.Configuration.ScopesSupported.Add(Scopes.OpenId);
                 }
@@ -283,6 +285,20 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                     throw new ArgumentNullException(nameof(context));
                 }
 
+                // Alibaba Cloud doesn't document whether sending client credentials using basic authentication
+                // is supported and doesn't return a "token_endpoint_auth_methods_supported" nor a
+                // "revocation_endpoint_auth_methods_supported" node containing alternative authentication
+                // methods, making basic authentication the default. While both token and revocation requests
+                // currently work, "client_secret_post" is manually added here to avoid potential issues.
+                if (context.Registration.ProviderType is ProviderTypes.AlibabaCloud)
+                {
+                    context.Configuration.TokenEndpointAuthMethodsSupported.Add(
+                        ClientAuthenticationMethods.ClientSecretPost);
+
+                    context.Configuration.RevocationEndpointAuthMethodsSupported.Add(
+                        ClientAuthenticationMethods.ClientSecretPost);
+                }
+
                 // Apple implements a non-standard client authentication method for its endpoints that
                 // is inspired by the standard private_key_jwt method but doesn't use the standard
                 // client_assertion/client_assertion_type parameters. Instead, the client assertion
@@ -290,7 +306,7 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                 // is the same as private_key_jwt, the configuration is amended to assume Apple supports
                 // private_key_jwt and an event handler is responsible for populating the client_secret
                 // parameter using the client assertion once it has been generated by OpenIddict.
-                if (context.Registration.ProviderType is ProviderTypes.Apple)
+                else if (context.Registration.ProviderType is ProviderTypes.Apple)
                 {
                     context.Configuration.RevocationEndpointAuthMethodsSupported.Add(
                         ClientAuthenticationMethods.PrivateKeyJwt);

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Exchange.cs

@@ -357,23 +357,23 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                     context.Response.RefreshToken = null;
                 }
 
-                // Note: Deezer doesn't return a standard "expires_in" parameter
-                // but returns an equivalent "expires" integer parameter instead.
-                if (context.Registration.ProviderType is ProviderTypes.Deezer)
-                {
-                    context.Response[Parameters.ExpiresIn] = context.Response["expires"];
-                    context.Response["expires"] = null;
-                }
-
-                // Note: Exact Online returns a non-standard "expires_in"
+                // Note: Alibaba Cloud and Exact Online returns a non-standard "expires_in"
                 // parameter formatted as a string instead of a numeric type.
-                else if (context.Registration.ProviderType is ProviderTypes.ExactOnline &&
+                if (context.Registration.ProviderType is ProviderTypes.AlibabaCloud or ProviderTypes.ExactOnline &&
                          long.TryParse((string?) context.Response[Parameters.ExpiresIn],
                              NumberStyles.Integer, CultureInfo.InvariantCulture, out long value))
                 {
                     context.Response.ExpiresIn = value;
                 }
 
+                // Note: Deezer doesn't return a standard "expires_in" parameter
+                // but returns an equivalent "expires" integer parameter instead.
+                else if (context.Registration.ProviderType is ProviderTypes.Deezer)
+                {
+                    context.Response[Parameters.ExpiresIn] = context.Response["expires"];
+                    context.Response["expires"] = null;
+                }
+
                 // Note: Huawei returns a non-standard "error" parameter as a numeric value, which is not allowed
                 // by OpenIddict (that requires a string). Huawei also returns a non-standard "sub_error" parameter
                 // that contains additional error information, with which the error code can demonstrate a specific

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.cs

@@ -1853,13 +1853,28 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                 throw new ArgumentNullException(nameof(context));
             }
 
-            // Active Directory Federation Services allows sending a custom "resource"
+            // Active Directory Federation Services allows sending an optional custom "resource"
             // parameter to define what API resources the access token will give access to.
             if (context.Registration.ProviderType is ProviderTypes.ActiveDirectoryFederationServices)
             {
                 var settings = context.Registration.GetActiveDirectoryFederationServicesSettings();
 
-                context.Request["resource"] = settings.Resource;
+                if (!string.IsNullOrEmpty(settings.Resource))
+                {
+                    context.Request.Resources = [settings.Resource];
+                }
+            }
+
+            // By default, Alibaba Cloud doesn't return a refresh token for native applications but allows sending an
+            // "access_type" parameter to retrieve one (but it is only returned during the first authorization dance).
+            // The documentation also indicates the "prompt" parameter is supported but not required,
+            // which can be set to "admin_consent" to force the display of the authorization page
+            if (context.Registration.ProviderType is ProviderTypes.AlibabaCloud)
+            {
+                var settings = context.Registration.GetAlibabaCloudSettings();
+
+                context.Request["access_type"] = settings.AccessType;
+                context.Request.Prompt = settings.Prompt;
             }
 
             // Atlassian requires sending an "audience" parameter (by default, "api.atlassian.com").
@@ -1899,7 +1914,7 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                 var settings = context.Registration.GetHuaweiSettings();
 
                 context.Request["access_type"] = settings.AccessType;
-                context.Request["display"] = settings.Display;
+                context.Request.Display = settings.Display;
             }
 
             // By default, MusicBrainz doesn't return a refresh token but allows sending an "access_type"
@@ -1956,7 +1971,7 @@ public static partial class OpenIddictClientWebIntegrationHandlers
             {
                 var settings = context.Registration.GetWeiboSettings();
 
-                context.Request["display"] = settings.Display;
+                context.Request.Display = settings.Display;
                 context.Request["forcelogin"] = settings.ForceLogin;
                 context.Request["language"] = settings.Language;
             }

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xml

@@ -74,6 +74,33 @@
     </Environment>
   </Provider>
 
+  <!--
+                            ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
+                            █ ▄▄▀██ ████▄ ▄██ ▄▄▀█ ▄▄▀██ ▄▄▀█ ▄▄▀████ ▄▄▀██ █████ ▄▄▄ ██ ██ ██ ▄▄▀██
+                            █ ▀▀ ██ █████ ███ ▄▄▀█ ▀▀ ██ ▄▄▀█ ▀▀ ████ █████ █████ ███ ██ ██ ██ ██ ██
+                            █ ██ ██ ▀▀ █▀ ▀██ ▀▀ █ ██ ██ ▀▀ █ ██ ████ ▀▀▄██ ▀▀ ██ ▀▀▀ ██▄▀▀▄██ ▀▀ ██
+                            ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
+  -->
+
+  <Provider Name="AlibabaCloud" DisplayName="Alibaba Cloud (Aliyun)" Id="078caf87-3c5b-46aa-a8af-31e7cb2f4b7a"
+            Documentation="https://www.alibabacloud.com/help/en/ram/user-guide/oauth-management/">
+    <!--
+      Note: Alibaba Cloud serves global users, but it is known as Aliyun in China, which has a separate issuer and domain.
+    -->
+
+    <Environment Issuer="https://oauth.{(settings.Region?.ToUpperInvariant() is 'CN' ? 'aliyun' : 'alibabacloud')}.com/"
+                 ConfigurationEndpoint="https://oauth.{(settings.Region?.ToUpperInvariant() is 'CN' ? 'aliyun' : 'alibabacloud')}.com/.well-known/openid-configuration" />
+
+    <Setting PropertyName="Region" ParameterName="region" Type="String" Required="false" DefaultValue="Global"
+             Description="The Alibaba Cloud (Aliyun) service region ('Global' for the global Alibaba Cloud by default, or can be set to 'CN' for Aliyun)" />
+
+    <Setting PropertyName="AccessType" ParameterName="type" Type="String" Required="false"
+             Description="The value used as the 'access_type' parameter (can be set to 'offline' to retrieve a refresh token)" />
+
+    <Setting PropertyName="Prompt" ParameterName="prompt" Type="String" Required="false"
+             Description="The value used as the 'prompt' parameter (can be set to 'admin_consent' to force the display of the authorization page)" />
+  </Provider>
+
   <!--
                                             ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
                                             █ ▄▄▀██ ▄▀▄ █ ▄▄▀██ ▄▄▄ ██ ▄▄▄ ██ ▀██ ██