How to use the parseurl.original function in parseurl

return function (req, res, next) {
    if (req.method !== 'GET' && req.method !== 'HEAD') {
      res.statusCode = 'OPTIONS' === req.method ? 200 : 405;
      res.setHeader('Allow', 'GET, HEAD, OPTIONS');
      res.setHeader('Content-Length', '0');
      res.end();
      return;
    }

    // parse URLs
    var url = parseUrl(req);
    var originalUrl = parseUrl.original(req);
    var dir = decodeURIComponent(url.pathname);
    var originalDir = decodeURIComponent(originalUrl.pathname);

    // join / normalize from root dir
    var path = normalize(join(rootPath, dir));

    // null byte(s), bad request
    if (~path.indexOf('\0')) return next(createError(400));

    // malicious path
    if ((path + sep).substr(0, rootPath.length) !== rootPath) {
      debug('malicious path "%s"', path);
      return next(createError(403));
    }

    // determine ".." display

return function serveStatic(req, res, next) {
        if (req.method !== 'GET' && req.method !== 'HEAD') {
            if (fallthrough) {
                return next();
            }

            // method not allowed
            res.statusCode = 405;
            res.setHeader('Allow', 'GET, HEAD');
            res.setHeader('Content-Length', '0');
            res.end();
            return;
        }

        let forwardError = !fallthrough;
        const originalUrl = parseUrl.original(req);
        let path = parseUrl(req)
            .pathname;

        // make sure redirect occurs at mount
        if (path === '/' && originalUrl.pathname.substr(-1) !== '/') {
            path = '';
        }

        // create send stream
        const stream = send(req, path, opts);

        // add directory handler
        stream.on('directory', onDirectory);

        // add headers listener
        if (setHeaders) {

// self-awareness
    if (req.session) {
      next()
      return
    }

    // Handle connection as if there is no session if
    // the store has temporarily disconnected etc
    if (!storeReady) {
      debug('store is disconnected')
      next()
      return
    }

    // pathname mismatch
    var originalPath = parseUrl.original(req).pathname || '/'
    if (originalPath.indexOf(cookieOptions.path || '/') !== 0) return next();

    // ensure a secret is available or bail
    if (!secret && !req.secret) {
      next(new Error('secret option required for sessions'));
      return;
    }

    // backwards compatibility for signed cookies
    // req.secret is passed from the cookie parser middleware
    var secrets = secret || [req.secret];

    var originalHash;
    var originalId;
    var savedHash;
    var touched = false

// respect headers from error
      if (status !== undefined) {
        headers = getErrorHeaders(err)
      }

      // fallback to status code on response
      if (status === undefined) {
        status = getResponseStatusCode(res)
      }

      // get error message
      msg = getErrorMessage(err, status, env)
    } else {
      // not found
      status = 404
      msg = 'Cannot ' + req.method + ' ' + encodeUrl(parseUrl.original(req).pathname)
    }

    debug('default %s', status)

    // schedule onerror callback
    if (err && onerror) {
      defer(onerror, err, req, res)
    }

    // cannot actually respond
    if (res._header) {
      debug('cannot %d after headers sent', status)
      req.socket.destroy()
      return
    }

return function redirect () {
    if (this.hasTrailingSlash()) {
      this.error(404)
      return
    }

    // get original URL
    var originalUrl = parseUrl.original(this.req)

    // append trailing slash
    originalUrl.path = null
    originalUrl.pathname = collapseLeadingSlashes(originalUrl.pathname + '/')

    // reformat the URL
    var loc = url.format(originalUrl)
    var msg = 'Redirecting to <a href="' + escapeHtml(loc) + '">' + escapeHtml(loc) + '</a>\n'
    var res = this.res

    // send redirect response
    res.statusCode = 303
    res.setHeader('Content-Type', 'text/html; charset=UTF-8')
    res.setHeader('Content-Length', Buffer.byteLength(msg))
    res.setHeader('X-Content-Type-Options', 'nosniff')
    res.setHeader('Location', loc)

return function redirect () {
    if (this.hasTrailingSlash()) {
      this.error(404)
      return
    }

    // get original URL
    var originalUrl = parseUrl.original(this.req)

    // append trailing slash
    originalUrl.path = null
    originalUrl.pathname = collapseLeadingSlashes(originalUrl.pathname + '/')

    // reformat the URL
    var loc = encodeUrl(url.format(originalUrl))
    var msg = 'Redirecting to <a href="' + escapeHtml(loc) + '">' + escapeHtml(loc) + '</a>\n'
    var res = this.res

    // send redirect response
    res.statusCode = 301
    res.setHeader('Content-Type', 'text/html; charset=UTF-8')
    res.setHeader('Content-Length', Buffer.byteLength(msg))
    res.setHeader('X-Content-Type-Options', 'nosniff')
    res.setHeader('Location', loc)

public static isUrl(req, testUrl: string): boolean {
        const originalUrl = require("parseurl").original(req);

        if (originalUrl && originalUrl.pathname && originalUrl.pathname === testUrl) {
            return true;
        }
        return false;
    }

function getResourceName (req) {
  try {
    return parseUrl.original(req).pathname
  } catch (e) {
    return 'resource'
  }
}

function getResourceName (req) {
  try {
    return parseUrl.original(req).pathname
  } catch (e) {
    return 'resource'
  }
}

public static isServiceRequest(req): boolean {
        const parseUrl = require("parseurl");
        const oUrl = parseUrl.original(req);

        return startsWith(oUrl.pathname, Utils.buildContextPath(Utils.config.getOrDefault("fullSpa.name", "/services")));
    }