izyim-mockapi/node_modules/json-server/lib/server/rewriter.js

'use strict';

const express = require('express');
const rewrite = require('express-urlrewrite');

module.exports = routes => {
  const router = express.Router();

  router.get('/__rules', (req, res) => {
    res.json(routes);
  });

  Object.keys(routes).forEach(key => {
    router.use(rewrite(key, routes[key]));
  });

  return router;
};