server.js

var express = require('express'),
  app = express(),
  port = process.env.PORT || 3000,
  mongoose = require('mongoose'),
  User = require('./api/models/userModel'),
  bodyParser = require('body-parser');
  jsonwebtoken = require("jsonwebtoken");

mongoose.Promise = global.Promise;
mongoose.connect('mongodb://school:school@ds249079.mlab.com:49079/schoolcom');
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
//Middleware for user validation start...
app.use(function(req, res, next){
  if(req.headers && req.headers.authorization && req.headers.authorization.split(' ')[0]=='JWT'){
    jsonwebtoken.verify(req.headers.authorization.split(' ')[1], 'schoolcom',function(err, decode){
      if(err){
        req.user = undefined;
      }
      req.user = decode;
      next();
    });
  } else {
    req.user = undefined;
    next();
  };
});
//Middleware for user validation end.....
var routes = require('./api/routes/schoolcomRoutes');
routes(app);
app.listen(port);
console.log('SchoolCom API server started on: ' + port);