text: const http = require('http');
  const data = {'data':'hello'};
  const url = require('url');
  const queryString = require('querystring');
  
  http.createServer(function(req, res) {
    var params = url.parse(req.url);
    console.log(params);
    if(params.query && queryString.parse(params.query).jsonpCallback) {
      console.log(1231232);
      const str = queryString.parse(params.query).jsonpCallback + '(' + JSON.stringify(data) + ')';
      // setTimeout(() => {
        res.end(str)
      // }, 10000)
    } else {
      res.end(JSON.stringify(data));
    }
  }).listen(5000, () => {
    console.log('server is running at 5000');
  });
  