Fix: Changed Statuscode on invalid authorization

src/ApiCommons/Middleware/LoggingMiddleware.cs

-using Coscine.Configuration;
+using Coscine.Configuration;
 using Coscine.JwtHandler;
 using Coscine.Logging;
 using Microsoft.AspNetCore.Http;
@@ -23,6 +23,7 @@ namespace Coscine.ApiCommons.Middleware
 
         public async Task Invoke(HttpContext context)
         {
+            bool _authorized = false;
             if (context.Request.Path.Value.Contains("TOS"))
             {
                 await _next(context);
@@ -61,25 +62,33 @@ namespace Coscine.ApiCommons.Middleware
                             CoscineLoggerMetadata.SetUri(_uri);
 
                             // Get the User Id
-                            var authorization = context.Request.Headers["Authorization"].ToArray();
-                            string bearer = null;
-                            foreach (var line in authorization)
+                            try
                             {
-                                if (line.Contains("Bearer"))
+                                var authorization = context.Request.Headers["Authorization"].ToArray();
+                                string bearer = null;
+                                foreach (var line in authorization)
                                 {
-                                    bearer = line;
+                                    if (line.Contains("Bearer"))
+                                    {
+                                        bearer = line;
+                                    }
                                 }
-                            }
-                            if (!string.IsNullOrWhiteSpace(bearer))
-                            {
-                                bearer = bearer.Replace("Bearer", "").Trim();
-                                JWTHandler jwtHandler = new JWTHandler(new ConsulConfiguration());
-                                var claims = jwtHandler.GetContents(bearer);
-                                var userId = Authenticator.GetUserId(claims);
-                                if (userId != null)
+                                if (!string.IsNullOrWhiteSpace(bearer))
                                 {
-                                    CoscineLoggerMetadata.SetUserId(userId);
+                                    bearer = bearer.Replace("Bearer", "").Trim();
+                                    JWTHandler jwtHandler = new JWTHandler(new ConsulConfiguration());
+                                    var claims = jwtHandler.GetContents(bearer);
+                                    var userId = Authenticator.GetUserId(claims);
+                                    if (userId != null)
+                                    {
+                                        CoscineLoggerMetadata.SetUserId(userId);
+                                    }
                                 }
+                                _authorized = true;
+                            }
+                            catch (Exception ex)
+                            {
+                                _authorized = false;
                             }
 
                             // Get the corrolation Id
@@ -180,8 +189,19 @@ namespace Coscine.ApiCommons.Middleware
 
                             if (!context.Response.HasStarted)
                             {
-                                context.Response.StatusCode = StatusCodes.Status500InternalServerError;
-                                byte[] data = System.Text.Encoding.UTF8.GetBytes("Unhandled Error occured. Please, try again in a while.");
+                                byte[] data;
+
+                                if (!_authorized)
+                                {
+									context.Response.StatusCode = StatusCodes.Status401Unauthorized;
+                                    data = System.Text.Encoding.UTF8.GetBytes("Invalid authentication. Please try again.");
+								}
+								else
+								{
+									context.Response.StatusCode = StatusCodes.Status500InternalServerError;
+									data = System.Text.Encoding.UTF8.GetBytes("Unhandled Error occured. Please, try again in a while.");
+								}						
+								
                                 context.Response.ContentLength = data.Length;
                                 originalResponseBody.Write(data, 0, data.Length);
                             }