fix bug on authn for gRPC

Author: thangchung

src/NetCoreKit.Infrastructure.GrpcHost/AuthInterceptor.cs

@@ -37,7 +37,8 @@ public override async Task<TResponse> UnaryServerHandler<TRequest, TResponse>(TR
         {
             try
             {
-                var attribute = (CheckPolicyAttribute)continuation.Method.GetCustomAttributes(typeof(CheckPolicyAttribute), false).FirstOrDefault();
+                var attribute = (CheckPolicyAttribute)continuation.Method
+                    .GetCustomAttributes(typeof(CheckPolicyAttribute), false).FirstOrDefault();
                 if (attribute == null)
                 {
                     return await continuation(request, context);
@@ -54,10 +55,27 @@ public override async Task<TResponse> UnaryServerHandler<TRequest, TResponse>(TR
                 }
 
                 var client = new HttpClient();
+
                 var idpConfig = _config.GetSection("Idp");
-                var disco = await client.GetDiscoveryDocumentAsync(idpConfig.GetValue<string>("Authority"));
-                var keys = new List<SecurityKey>();
+                var discoveryRequest = new DiscoveryDocumentRequest
+                {
+                    Address = idpConfig.GetValue<string>("Authority"),
+                    Policy =
+                    {
+                        Authority = idpConfig.GetValue<string>("Authority"),
+                        RequireHttps = false, // TODO: for demo only
+                        ValidateIssuerName = false, // TODO: for demo only
+                    }
+                };
 
+                var disco = await client.GetDiscoveryDocumentAsync(discoveryRequest);
+                if (disco?.KeySet == null)
+                {
+                    throw new Exception(
+                        $"Cannot discover IdpServer with Authority={idpConfig.GetValue<string>("Authority")} and Audience={idpConfig.GetValue<string>("Audience")}.");
+                }
+
+                var keys = new List<SecurityKey>();
                 foreach (var webKey in disco.KeySet.Keys)
                 {
                     var e = Base64Url.Decode(webKey.E);
@@ -94,7 +112,8 @@ public override async Task<TResponse> UnaryServerHandler<TRequest, TResponse>(TR
                     throw new AuthenticationException("Cannot get authorization on the header.");
                 }
 
-                var user = handler.ValidateToken(userToken.TrimStart("Bearer").TrimStart("bearer").TrimStart(" "), parameters, out _);
+                var user = handler.ValidateToken(userToken.TrimStart("Bearer").TrimStart("bearer").TrimStart(" "),
+                    parameters, out _);
 
                 if (user == null)
                 {

templates/NetCoreKit.GrpcTemplate.MongoDb/HostBuilderExtensions.cs

@@ -23,19 +23,19 @@ public static IHost ConfigureDefaultSettings(this HostBuilder hostBuilder,
         {
             return hostBuilder
                 .ConfigureHostConfiguration(configHost =>
-                 {
-                     configHost.SetBasePath(Directory.GetCurrentDirectory());
-                     configHost.AddJsonFile("hostsettings.json", optional: true);
-                     configHost.AddEnvironmentVariables();
-                     configHost.AddCommandLine(args);
-                 })
+                {
+                    configHost.SetBasePath(Directory.GetCurrentDirectory());
+                    configHost.AddJsonFile("hostsettings.json", optional: true);
+                    configHost.AddEnvironmentVariables();
+                    configHost.AddCommandLine(args);
+                })
                 .ConfigureAppConfiguration((hostContext, configApp) =>
                 {
+                    configApp.AddEnvironmentVariables();
                     configApp.AddJsonFile("appsettings.json", optional: true);
                     configApp.AddJsonFile(
                         $"appsettings.{hostContext.HostingEnvironment.EnvironmentName}.json",
                         optional: true);
-                    configApp.AddEnvironmentVariables();
                     configApp.AddCommandLine(args);
                 })
                 .ConfigureServices((hostContext, services) =>