node.js express generator app not responding - node.js

Question

The only file/folder ive changed is the main app.js after i installed express generator and npm install. Im a newb, maybe its its a typo in the app.js file. Heres the file and console output. Thanks so much. when i go to localhost:3000 on chrome it says cannot GET/ and it failed to load resource in console 404 and on the comm line it says GET / 404 11.960 ms - 13 everytime i reload the page
^Cryan#\Ryan:~/Desktop/node/frameworks/expressapi$ npm start
> expressapi#0.0.0 start /home/ryan/Desktop/node/frameworks/expressapi
> node ./bin/www
curl -X get http://localhost:3000/products
curl -X DELETE http://localhost:3000/products/2
and the app.js file
var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var routes = require('./routes');
var users = require('./routes/users');
var app = express();
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');
// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
var products = [
{
id: 0,
name: 'watch',
description: 'tell time with this amazing watch',
price: 30.00
},
{
id: 1,
name: 'sandals',
description: 'walk in comfort with these sansdals',
price: 10.00
},
{
id: 2,
name: 'watch',
description: 'protect your eyes!',
price: 25.00
}
];
app.get('./routes');
app.get('/products', function(req, res) {
res.json(products);
});
app.get('/products/:id', function(req, res) {
if (req.params.id > (products.length - 1) || req.params.id < 0) {
res.statusCode = 404;
res.end('NotFound');
}
res.json(products[req.params.id]);
});
app.post('/products', function(req, res) {
if (typeof req.body.name === 'undefined') {
res.statusCode = 400;
res.end('a product name is required');
}
products.push(req.body);
res.send(req.body);
});
app.put('/products/:id', function(req, res) {
if (req.params.id > (products.length - 1) || req.params.id < 0) {
res.statusCode = 404;
res.end('not found');
}
products[req.params.id] = req.body;
res.send(req.body);
});
app.delete('/products/:id', function(req, res) {
if (req.params.id > (products.length - 1) || req.params.id < 0) {
res.statusCode = 400;
res.end('not found for that id');
}
products.splice(req.params.id, 1);
res.json(products);
});
module.exports = app;
and here iis the www file
#!/usr/bin/env node
/**
* Module dependencies.
*/
var app = require('../app');
var debug = require('debug')('expressapi:server');
var http = require('http');
/**
* Get port from environment and store in Express.
*/
var port = normalizePort(process.env.PORT || '3000');
app.set('port', port);
/**
* Create HTTP server.
*/
var server = http.createServer(app);
/**
* Listen on provided port, on all network interfaces.
*/
server.listen(port);
server.on('error', onError);
server.on('listening', onListening);
/**
* Normalize a port into a number, string, or false.
*/
function normalizePort(val) {
var port = parseInt(val, 10);
if (isNaN(port)) {
// named pipe
return val;
}
if (port >= 0) {
// port number
return port;
}
return false;
}
/**
* Event listener for HTTP server "error" event.
*/
function onError(error) {
if (error.syscall !== 'listen') {
throw error;
}
var bind = typeof port === 'string'
? 'Pipe ' + port
: 'Port ' + port;
// handle specific listen errors with friendly messages
switch (error.code) {
case 'EACCES':
console.error(bind + ' requires elevated privileges');
process.exit(1);
break;
case 'EADDRINUSE':
console.error(bind + ' is already in use');
process.exit(1);
break;
default:
throw error;
}
}
/**
* Event listener for HTTP server "listening" event.
*/
function onListening() {
var addr = server.address();
var bind = typeof addr === 'string'
? 'pipe ' + addr
: 'port ' + addr.port;
debug('Listening on ' + bind);
}

Answer 1

I run your code and it looks fine. It does not have a route for "/", so you will get a Cannot GET / message in the browser if you enter http://localhost:3000/
http://localhost:3000/products returns your JSON data correctly.
For the curl command you have to use GET in capital letters:
curl -X GET http://localhost:3000/products
[{"id":0,"name":"watch","description":"tell time with this amazing watch","price":30},{"id":1,"name":"sandals","description":"walk in comfort with these sansdals","price":10},{"id":2,"name":"watch","description":"protect your eyes!","price":25}]
If you want to add the default '/' route from express generator, change your app.js file on line with this code:
var routes = require('./routes/index');
And then add the following line later on in the code:
app.use('/', routes);
You will then see the Welcome to Express message when you point your browser to http://localhost:3000
I hope that helps clarify.