app.js

var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

const qs = require('querystring');
const session = require('express-session');


var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
const randomString = require('randomstring');


var app = express();
app.use(
  session({
    secret: randomString.generate(),
    cookie: { maxAge: 60000 },
    resave: false,
    saveUninitialized: false
}));

const cors = require('cors');

app.use(cors());

//database
var mongoose = require('mongoose');

mongoose.connect('mongodb://localhost:27017/commenthub',  { useNewUrlParser: true });
 
//mongoose.connect('mongodb://bellafkb:pool2comment@ds157256.mlab.com:57256/commenthub' ,  { useNewUrlParser: true });

var db = mongoose.connection;
 
db.on('error', console.error.bind(console, 'connection error:'));
 
db.once('open', function() {
  console.log("Db Connection Successful!");
});
 
app.all('/*', function(req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  next();
});

// view engine setup

//Access-Control-Allow-Origin
app.use(function(req, res, next) {
  res.header('Access-Control-Allow-Origin', "*");
  res.header('Access-Control-Allow-Methods','GET,PUT,POST,DELETE');
  res.header('Access-Control-Allow-Headers', 'Content-Type');
  next();
});

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/api', indexRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;