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diff --git a/solr-8.1.1/server/solr-webapp/webapp/js/angular/controllers/unknown.js b/solr-8.1.1/server/solr-webapp/webapp/js/angular/controllers/unknown.js
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+/*
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements.  See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership.
+ The ASF licenses this file to You under the Apache License, Version 2.0
+ (the "License"); you may not use this file except in compliance with
+ the License.  You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * This controller is called whenever no other routes match.
+ * It is a place to intercept to look for special flows such as authentication callbacks (that do not support fragment in URL).
+ * Normal action is to redirect to dashboard "/" if no login is in progress
+ */
+solrAdminApp.controller('UnknownController',
+  ['$scope', '$window', '$routeParams', '$location', 'Constants', 'AuthenticationService',
+    function($scope, $window, $routeParams, $location, Constants, AuthenticationService) {
+      var fragment = $window.location.hash.startsWith("#/") ? $window.location.hash.substring(2) : $window.location.hash;
+      // Check if the URL is actually a callback from Identiy provider 
+      if (AuthenticationService.isJwtCallback(fragment)) {
+        console.log("Detected an authentication callback, redirecting to /#/login/callback");
+        $location.path("/login/callback").hash(fragment);
+      } else {
+        console.log("Redirecting from unknown path " + fragment + " to Dashboard");
+        $location.path("/").hash("");
+      }
+    }
+  ]
+);