kibana-123/src/core_plugins/elasticsearch/lib/map_uri.js

Kibana is an open source (Apache Licensed), browser based analytics and search dashboard for Elasticsearch. Kibana is a snap to setup and start using. Kibana strives to be easy to get started with, while also being flexible and powerful, just like Elastic

import { defaults, omit, trimLeft, trimRight } from 'lodash';
import { parse as parseUrl, format as formatUrl, resolve } from 'url';
import filterHeaders from './filter_headers';
import setHeaders from './set_headers';

export default function mapUri(cluster, proxyPrefix) {
  function joinPaths(pathA, pathB) {
    return trimRight(pathA, '/') + '/' + trimLeft(pathB, '/');
  }

  return function (request, done) {
    const {
      protocol: esUrlProtocol,
      slashes: esUrlHasSlashes,
      auth: esUrlAuth,
      hostname: esUrlHostname,
      port: esUrlPort,
      pathname: esUrlBasePath,
      query: esUrlQuery
    } = parseUrl(cluster.getUrl(), true);

    // copy most url components directly from the elasticsearch.url
    const mappedUrlComponents = {
      protocol: esUrlProtocol,
      slashes: esUrlHasSlashes,
      auth: esUrlAuth,
      hostname: esUrlHostname,
      port: esUrlPort
    };

    // pathname
    const reqSubPath = request.path.replace(proxyPrefix, '');
    mappedUrlComponents.pathname = joinPaths(esUrlBasePath, reqSubPath);

    // querystring
    const mappedQuery = defaults(omit(request.query, '_'), esUrlQuery);
    if (Object.keys(mappedQuery).length) {
      mappedUrlComponents.query = mappedQuery;
    }

    const filteredHeaders = filterHeaders(request.headers, cluster.getRequestHeadersWhitelist());
    const mappedHeaders = setHeaders(filteredHeaders, cluster.getCustomHeaders());
    const mappedUrl = formatUrl(mappedUrlComponents);
    done(null, mappedUrl, mappedHeaders);
  };
};