Added temporary code for identity server multitenancy

src/MicroserviceDemo/MicroserviceDemo.AuthServer/MicroservicesAuthServerModule.cs

@@ -97,11 +97,12 @@ namespace MicroserviceDemo.AuthServer
                 app.UseDeveloperExceptionPage();
             }
 
-            app.UseMultiTenancy();
-
             app.UseStaticFiles();
             app.UseVirtualFiles();
 
+            app.UseAuthentication(); //TODO: This makes it twice since UseIdentityServer also internally adds UseAuthentication!
+            app.UseMultiTenancy();
+
             app.UseIdentityServer(); //This internally adds .UseAuthentication() (we should be carefully about that)
 
             app.UseMvc(routes =>

src/MicroserviceDemo/MicroserviceDemo.Web/MicroservicesDemoWebModule.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Threading.Tasks;
 using Microsoft.AspNetCore.Authentication.OAuth.Claims;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
@@ -69,9 +70,9 @@ namespace MicroserviceDemo.Web
                 {
                     "/Abp/ApplicationConfigurationScript?_v=" + DateTime.Now.Ticks,
                     "/Abp/ServiceProxyScript?_v=" + DateTime.Now.Ticks
-                }); 
+                });
             });
-            
+
             services.AddAuthentication(options =>
                 {
                     options.DefaultChallengeScheme = "oidc";
@@ -97,6 +98,19 @@ namespace MicroserviceDemo.Web
                     options.Scope.Add("multi-tenancy-api");
 
                     options.ClaimActions.MapAbpClaimTypes();
+
+                    options.Events.OnRedirectToIdentityProvider += context =>
+                    {
+                        //TODO: ...
+
+                        var tenantId = context.HttpContext.RequestServices.GetRequiredService<ICurrentTenant>().Id?.ToString();
+                        if (!tenantId.IsNullOrEmpty())
+                        {
+                            context.ProtocolMessage.Parameters[TenantResolverConsts.DefaultTenantKey] = tenantId;
+                        }
+
+                        return Task.CompletedTask;
+                    };
                 });
 
             services.Configure<RemoteServiceOptions>(configuration);

src/Volo.Abp.Account.Web.IdentityServer/Pages/Account/Login.cshtml.cs

@@ -18,6 +18,7 @@ using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
 using Volo.Abp.Account.Web.Auth;
 using Volo.Abp.Identity;
+using Volo.Abp.MultiTenancy;
 using Volo.Abp.Ui;
 using Volo.Abp.Uow;
 
@@ -55,12 +56,12 @@ namespace Volo.Abp.Account.Web.Pages.Account
         private readonly IEventService _identityServerEvents;
 
         public IdsLoginModel(
-            SignInManager<IdentityUser> signInManager, 
-            IdentityUserManager userManager, 
-            IIdentityServerInteractionService interaction, 
-            IAuthenticationSchemeProvider schemeProvider, 
-            IOptions<AbpAccountOptions> accountOptions, 
-            IClientStore clientStore, 
+            SignInManager<IdentityUser> signInManager,
+            IdentityUserManager userManager,
+            IIdentityServerInteractionService interaction,
+            IAuthenticationSchemeProvider schemeProvider,
+            IOptions<AbpAccountOptions> accountOptions,
+            IClientStore clientStore,
             IEventService identityServerEvents)
         {
             _signInManager = signInManager;
@@ -77,12 +78,29 @@ namespace Volo.Abp.Account.Web.Pages.Account
             LoginInput = new LoginInputModel();
 
             var context = await _interaction.GetAuthorizationContextAsync(ReturnUrl);
-            LoginInput.UserNameOrEmailAddress = context?.LoginHint;
+
+            if (context != null)
+            {
+                LoginInput.UserNameOrEmailAddress = context.LoginHint;
+
+                //TODO: !!! Always exchanging tenant id, not name!
+                var tenant = context.Parameters[TenantResolverConsts.DefaultTenantKey];
+                if (tenant.IsNullOrEmpty())
+                {
+                    Response.Cookies.Delete(TenantResolverConsts.DefaultTenantKey);
+                    CurrentTenant.Change(null);
+                }
+                else
+                {
+                    Response.Cookies.Append(TenantResolverConsts.DefaultTenantKey, tenant);
+                    CurrentTenant.Change(Guid.Parse(tenant));
+                }
+            }
 
             if (context?.IdP != null)
             {
                 LoginInput.UserNameOrEmailAddress = context.LoginHint;
-                ExternalProviders = new[] {new ExternalProviderModel {AuthenticationScheme = context.IdP}};
+                ExternalProviders = new[] { new ExternalProviderModel { AuthenticationScheme = context.IdP } };
                 return;
             }
 
@@ -111,7 +129,7 @@ namespace Volo.Abp.Account.Web.Pages.Account
                     }
                 }
             }
-            
+
             ExternalProviders = providers.ToArray();
 
             if (IsExternalLoginOnly)
@@ -165,7 +183,7 @@ namespace Volo.Abp.Account.Web.Pages.Account
 
             return Redirect(ReturnUrl); //ReturnUrlHash?
         }
-        
+
         [UnitOfWork]
         public virtual async Task<IActionResult> OnPostExternalLogin(string provider)
         {

src/Volo.Abp.AspNetCore.MultiTenancy/Volo/Abp/AspNetCore/MultiTenancy/AspNetCoreMultiTenancyOptions.cs

@@ -1,15 +1,17 @@
-namespace Volo.Abp.AspNetCore.MultiTenancy
+using Volo.Abp.MultiTenancy;
+
+namespace Volo.Abp.AspNetCore.MultiTenancy
 {
     public class AspNetCoreMultiTenancyOptions
     {
         /// <summary>
-        /// Default: "__tenant".
+        /// Default: <see cref="TenantResolverConsts.DefaultTenantKey"/>.
         /// </summary>
         public string TenantKey { get; set; }
 
         public AspNetCoreMultiTenancyOptions()
         {
-            TenantKey = "__tenant";
+            TenantKey = TenantResolverConsts.DefaultTenantKey;
         }
     }
 }

src/Volo.Abp.MultiTenancy.Abstractions/Volo/Abp/MultiTenancy/TenantResolverConsts.cs

@@ -0,0 +1,7 @@
+namespace Volo.Abp.MultiTenancy
+{
+    public class TenantResolverConsts
+    {
+        public const string DefaultTenantKey = "__tenant";
+    }
+}