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xsrf.js
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xsrf.js
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/*
* Licensed to Elasticsearch B.V. under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch B.V. 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.
*/
import { badRequest } from 'boom';
export function setupXsrf(server, config) {
const disabled = config.get('server.xsrf.disableProtection');
const whitelist = config.get('server.xsrf.whitelist');
const versionHeader = 'kbn-version';
const xsrfHeader = 'kbn-xsrf';
server.ext('onPostAuth', function onPostAuthXsrf(req, h) {
if (disabled) {
return h.continue;
}
if (whitelist.includes(req.path)) {
return h.continue;
}
const isSafeMethod = req.method === 'get' || req.method === 'head';
const hasVersionHeader = versionHeader in req.headers;
const hasXsrfHeader = xsrfHeader in req.headers;
if (!isSafeMethod && !hasVersionHeader && !hasXsrfHeader) {
throw badRequest(`Request must contain a ${xsrfHeader} header.`);
}
return h.continue;
});
}