D-Net

'use strict'

var express = require('express');

var app = express();

var mcache = require('memory-cache');

const request = require('superagent');

var cors = require('cors')

app.use(cors())

var cache = (duration) => {

  return (req, res, next) => {

    let key = '__express__' + req.originalUrl || req.url

    let cachedBody = mcache.get(key)

    if (cachedBody) {

      res.send(JSON.parse(cachedBody))

      return

    } else {

      res.sendResponse = res.send

      res.send = (body) => {

        mcache.put(key, body, duration * 1000);

        res.sendResponse(body)

      }

      next()

    }

  }

}

app.get('/get',cache(10), cors(), (req, res) => {

  setTimeout(() => {

    const url = (req.query)?req.query.url:null;

    if (!url){

        res.status(404).send('Not Found'); //not found

    }else{

     request.get(url, function (err, response) {

       // res.header("Access-Control-Allow-Origin", "http://localhost:3000");

       res.header("Access-Control-Allow-Headers", "Origin, Content-Type,  Content-Length");

       res.header("Access-Control-Allow-Methods", "GET,  OPTIONS");

       res.header("Access-Control-Allow-Methods", "GET,  OPTIONS");

       res.header("Content-Type","application/json");

          if (err) throw err;

          res.send(response.body);

    })

  }

})

});

app.use((req, res) => {

  res.status(404).send('Not Found') //not found

})

app.listen(process.env.PORT, function () {

  console.log(`Example app listening on port ${process.env.PORT}!`)

})