@lskjs/server/utils/fallback.js

LSK server.

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = fallback;

var _regenerator = _interopRequireDefault(require("@babel/runtime/regenerator"));

var _asyncToGenerator2 = _interopRequireDefault(require("@babel/runtime/helpers/asyncToGenerator"));

var _mapValues = _interopRequireDefault(require("lodash/mapValues"));

var _pick = _interopRequireDefault(require("lodash/pick"));

function fallback() {
  return _fallback.apply(this, arguments);
}

function _fallback() {
  _fallback = (0, _asyncToGenerator2["default"])( /*#__PURE__*/_regenerator["default"].mark(function _callee() {
    var _ref,
        fallbackUrl,
        req,
        res,
        url,
        result,
        file,
        headers,
        _args = arguments;

    return _regenerator["default"].wrap(function _callee$(_context) {
      while (1) {
        switch (_context.prev = _context.next) {
          case 0:
            _ref = _args.length > 0 && _args[0] !== undefined ? _args[0] : {}, fallbackUrl = _ref.url, req = _ref.req, res = _ref.res;
            url = "".concat(fallbackUrl, "/").concat(req.path);
            _context.next = 4;
            return fetch(url);

          case 4:
            result = _context.sent;
            _context.next = 7;
            return result.buffer();

          case 7:
            file = _context.sent;
            headers = (0, _mapValues["default"])((0, _pick["default"])(result.headers.raw(), ['server', 'date', 'content-type', 'connection', 'last-modified', 'etag', 'expires', 'cache-control', 'accept-ranges', 'strict-transport-security']), function (a) {
              return String(a);
            });
            return _context.abrupt("return", res.set(headers).send(file));

          case 10:
          case "end":
            return _context.stop();
        }
      }
    }, _callee);
  }));
  return _fallback.apply(this, arguments);
}
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