concurrency fix

Author: Björn Weström

Titanium.Web.Proxy/ResponseHandler.cs

@@ -28,15 +28,14 @@ private async Task HandleHttpSessionResponse(SessionEventArgs args)
                 await args.WebSession.ReceiveResponse();
 
                 var response = args.WebSession.Response;
+                args.ReRequest = false;
 
                 //check for windows authentication
                 if (isWindowsAuthenticationEnabledAndSupported && response.StatusCode == (int)HttpStatusCode.Unauthorized)
                 {
                     await Handle401UnAuthorized(args);
                 }
 
-                args.ReRequest = false;
-
                 //if user requested call back then do it
                 if (!response.Locked)
                 {

Titanium.Web.Proxy/WinAuthHandler.cs

@@ -130,12 +130,8 @@ internal async Task Handle401UnAuthorized(SessionEventArgs args)
                 //Should we cache all Set-Cokiee headers from server during auth process
                 //and send it to client after auth?
 
-                //clear current server response
-                await args.ClearResponse();
-
-                //request again with updated authorization header
-                //and server cookies
-                await HandleHttpSessionRequestInternal(args.WebSession.ServerConnection, args);
+                // Let ReposnseHandler send the updated request
+                args.ReRequest = true;
             }
         }
     }