UpdateFuncWithSB.js

gistfile1.js

var vm = require('vm');
var util = require('util');
var express = require('express');
var bodyParser = require('body-parser');
var multer = require('multer'); // v1.0.5
var upload = multer(); // for parsing multipart/form-data

var app = express();

app.use(bodyParser.json()); // for parsing application/json
app.use(bodyParser.urlencoded({extended: true})); // for parsing application/x-www-form-urlencoded

app.get('/', function processFunc(req, res) {
    res.send('Hello What!');
});

app.listen(3000, function () {
    console.log('Example app listening on port 3000!');
});


app.post('/helloWhat', upload.array(), function (req, res) {
    var helloWhat = "app._router.stack[4].route.stack[0].handle=function (req, res) {res.send('Hello %s!');}";
    var context = {
        app: app,
        require: require
    };
    try {
        vm.runInNewContext(util.format(helloWhat, req.body.what), context);
        res.send('helloWhat res');
    } catch (e) {
        res.send('helloWhat err res');
    }
});