Improve response catch module (#3848)

* add err hanlder for dialog ajax request

* add error handler for component ajax request

* repair code bug

* repair code bug

* add handler for page ajax module

frontend/src/components/dialog/org-add-admin-dialog.js

@@ -2,6 +2,8 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import { Button, Modal, ModalHeader, ModalBody, ModalFooter, Alert } from 'reactstrap';
 import { gettext, orgID } from '../../utils/constants';
+import { Utils } from '../../utils/utils';
+import toaster from '../toast';
 import UserSelect from '../user-select';
 import { seafileAPI } from '../../utils/seafile-api';
 import OrgUserInfo from '../../models/org-user';
@@ -35,12 +37,9 @@ class AddOrgAdminDialog extends React.Component {
     seafileAPI.setOrgAdmin(orgID, userEmail, true).then(res => {
       let userInfo = new OrgUserInfo(res.data);
       this.props.onAddedOrgAdmin(userInfo);
-    }).catch((error) => {
-      if (error.response) {
-        this.setState({
-          errMessage: error.response.data.error_msg
-        });
-      }
+    }).catch(error => {
+      let errMessage = Utils.getErrorMsg(error);
+      toaster.danger(errMessage);
     });
   }