GUACAMOLE-136: Use hidden submit button for submitting Duo response (form.submit() inserts query parameters and causes browser navigation, despite ngSubmit preventing default).

extensions/guacamole-auth-duo/src/main/resources/controllers/duoSignedResponseController.js

@@ -56,7 +56,7 @@ angular.module('guacDuo').controller('duoSignedResponseController', ['$scope',
         });
 
         // Submit updated credentials
-        $(iframe).parents('form').submit();
+        $('.duo-signature-response-field input[type="submit"]').click();
 
     };
 

extensions/guacamole-auth-duo/src/main/resources/styles/duo.css

@@ -17,6 +17,10 @@
  * under the License.
  */
 
+.duo-signature-response-field input[type="submit"] {
+    display: none !important;
+}
+
 .duo-signature-response-field iframe {
     width: 100%;
     max-width: 620px;

extensions/guacamole-auth-duo/src/main/resources/templates/duoSignedResponseField.html

@@ -1,3 +1,4 @@
 <div class="duo-signature-response-field" ng-class="{ loading : !duoInterfaceLoaded }">
     <iframe></iframe>
+    <input type="submit">
 </div>