server.js

var express = require('express')
var app = express()
var bodyParser = require('body-parser');
var fs = require('fs')
var rs = require('randomstring')
var findRemoveSync = require('find-remove')

var name = ""
var upperBound = '1gb';
var port = process.env.PORT || 8000;
console.log(port);
var result = findRemoveSync(__dirname + '/download', {
    age: {
        seconds: 3600
    },
    extensions: '.ics'
})

app.listen(port)
app.use(express.static(__dirname))
app.use(bodyParser.urlencoded({ extended: true}));
app.use(bodyParser.json());
app.post('/cal', function(req, resp) {

    var cat = req.body.data.split("\\n")
    name = "carlendar" + req.body.id
    fs.writeFile('download/' + name + '.ics', cat.join("\n"), (err) => {
        console.log(name)
    })
    resp.sendStatus(200)
});
app.get('/download', function(req, res) {
    res.send('download/carlendar');
});