change DashboardMiddleware to async (#390)

src/DotNetCore.CAP/Dashboard/CAP.DashboardMiddleware.cs

@@ -27,12 +27,13 @@ namespace DotNetCore.CAP
             _routes = routes ?? throw new ArgumentNullException(nameof(routes));
         }
 
-        public Task Invoke(HttpContext context)
+        public async Task Invoke(HttpContext context)
         {
             if (!context.Request.Path.StartsWithSegments(_options.PathMatch,
                 out var matchedPath, out var remainingPath))
             {
-                return _next(context);
+                await _next(context);
+                return;
             }
 
             // Update the path
@@ -48,23 +49,27 @@ namespace DotNetCore.CAP
 
                 if (findResult == null)
                 {
-                    return _next.Invoke(context);
+                    await _next.Invoke(context);
+                    return;
                 }
 
-                if (_options.Authorization.Any(filter => !filter.Authorize(dashboardContext)))
+                foreach (var authorizationFilter in _options.Authorization)
                 {
+                    var authenticateResult = await authorizationFilter.AuthorizeAsync(dashboardContext);
+                    if (authenticateResult) continue;
+
                     var isAuthenticated = context.User?.Identity?.IsAuthenticated;
 
                     context.Response.StatusCode = isAuthenticated == true
-                        ? (int) HttpStatusCode.Forbidden
-                        : (int) HttpStatusCode.Unauthorized;
+                        ? (int)HttpStatusCode.Forbidden
+                        : (int)HttpStatusCode.Unauthorized;
 
-                    return Task.CompletedTask;
+                    return;
                 }
 
                 dashboardContext.UriMatch = findResult.Item2;
 
-                return findResult.Item1.Dispatch(dashboardContext);
+                await findResult.Item1.Dispatch(dashboardContext);
             }
             finally
             {

src/DotNetCore.CAP/Dashboard/IDashboardAuthorizationFilter.cs

@@ -1,10 +1,12 @@
 // Copyright (c) .NET Core Community. All rights reserved.
 // Licensed under the MIT License. See License.txt in the project root for license information.
 
+using System.Threading.Tasks;
+
 namespace DotNetCore.CAP.Dashboard
 {
     public interface IDashboardAuthorizationFilter
     {
-        bool Authorize(DashboardContext context);
+        Task<bool> AuthorizeAsync(DashboardContext context);
     }
 }

src/DotNetCore.CAP/Dashboard/LocalRequestsOnlyAuthorizationFilter.cs

@@ -1,13 +1,16 @@
 // Copyright (c) .NET Core Community. All rights reserved.
 // Licensed under the MIT License. See License.txt in the project root for license information.
 
+using System.Threading.Tasks;
 using DotNetCore.CAP.Infrastructure;
 
 namespace DotNetCore.CAP.Dashboard
 {
     public class LocalRequestsOnlyAuthorizationFilter : IDashboardAuthorizationFilter
     {
-        public bool Authorize(DashboardContext context)
+#pragma warning disable 1998
+        public async Task<bool> AuthorizeAsync(DashboardContext context)
+#pragma warning restore 1998
         {
             var ipAddress = context.Request.RemoteIpAddress;
             // if unknown, assume not local