mcgilman commented on a change in pull request #3401: NIFI-6160 NIFI-6170 Apply
config error handling convention
URL: https://github.com/apache/nifi/pull/3401#discussion_r274508453
##########
File path:
nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/js/nf/nf-error-handler.js
##########
@@ -142,6 +142,36 @@
// show the error pane
$('#message-pane').show();
}
+ },
+
+ /**
+ * Method for handling ajax errors when submitting configuration
update (PUT/POST) requests.
+ * In addition to what handleAjaxError does, this function splits
+ * the error message text to display them as an unordered list.
+ *
+ * @argument {object} xhr The XmlHttpRequest
+ * @argument {string} status The status of the request
+ * @argument {string} error The error
+ */
+ handleConfigurationUpdateAjaxError: function (xhr, status, error) {
+ if (xhr.status === 400) {
+ var errors = xhr.responseText.split('\n');
+
+ var content;
+ if (errors.length === 1) {
+ content = $('<span></span>').text(errors[0]);
+ } else {
+ content = nfCommon.formatUnorderedList(errors);
+ }
+
+ nfDialog.showOkDialog({
+ dialogContent: content,
+ headerText: 'Configuration Error'
+ });
+ } else {
+ self.handleAjaxError(xhr, status, error);
Review comment:
The idea is the error handler is to simply show a dialog when the error is
something that is expected and where we want the user to be able to continue
using the application. When the error is not expected (like a 500 response
code) or we do not want the user to attempt another request (like the user is
not authenticated) we hide the canvas by showing the `message-pane`.
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