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I cant seem to figure out folder structure and it says the system cant find my file?

can't seem to figure out what the problem with my file structure might be. I'm using Aurelia as a front end and node for the server. I did a join that fixed some of the issues but now I'm getting this error:
Error: (SystemJS) Error: XHR error (404 Not Found) loading http://localhost:3000/src/main.js
Error loading http://localhost:3000/src/main.js
This is my server.js file:
var express = require('express'),
app = express(),
engines = require('consolidate'),
MongoClient = require('mongodb').MongoClient,
assert = require('assert'),
bodyParser = require('body-parser');
app.engine('html', engines.nunjucks);
app.set('view engine', 'html');
app.set('views', __dirname + '/views');
app.use(bodyParser.urlencoded({ useNewUrlParser: true }));
app.use('/scripts', express.static(require('path').join(__dirname, 'scripts')));
function errorHandler(err, req, res, next) {
console.log(err.message);
console.log(err.stack);
res.status(500).render('error_template', {err: err});
}
MongoClient.connect('mongodb://localhost:27017/', function(err, client) {
assert.equal(null, err);
console.log('MongoDB connected!')
var db = client.db('todos');
app.get('/', function(req, res) {
res.render('index', {});
});
app.use(errorHandler);
});
var server = app.listen(3000, function() {
var port = server.address().port;
console.log("Express server listening on port %s.", port);
});

app.use('/scripts', express.static(require('path').join(__dirname, 'scripts')));
This line of code takes a local folder and makes it available through the express server. You need to do the same thing for your src folder
either with:
app.use('/src', express.static(require('path').join(__dirname, 'src')));
or:
app.use(express.static(require('path').join(__dirname, 'src')));
the first parameter allows you to name the directory it will be served as, which is usually the same.
And even though I didn't include the require('path').join(__dirname,... in the comment, it's good practice to include it.

TypeError: data base object cannot be found

I am using "express": "3.2.6", and nodeJS v0.10.25.
When running my app.js I get:
TypeError: Object #<IncomingMessage> has no method 'getConnection'
My app.js:
/**
* Module dependencies.
*/
var express = require('express')
, routes = require('./routes')
, user = require('./routes/user')
, http = require('http')
, path = require('path');
var app = express();
//database connection
var connection = require('express-myconnection');
var mysql = require('mysql');
//all environments
app.set('port', process.env.PORT || 3000);
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));
//development only
if ('development' == app.get('env')) {
app.use(express.errorHandler());
}
/*------------------------------------------
connection peer, register as middleware
type koneksi : single,pool and request
-------------------------------------------*/
app.use(
connection(mysql,{
host: 'localhost',
user: 'root',
password : '',
port : 3306, //port mysql
database:'db-test'
},'pool')
);
//routes
//app.get('/', routes.index);
app.get('/', routes.list);
app.get('/users', user.list);
http.createServer(app).listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
My index.js file looks like that:
/*
* GET home page.
*/
//exports.index = function(req, res){
// res.render('index', { title: 'Express' });
//};
/**
* returns all trade objects
*/
exports.list = function(req, res){
req.getConnection(function(err,connection){
connection.query('SELECT * FROM trades',function(err,rows) {
if(err)
console.log("Error Selecting : %s ",err );
res.render('customers',{page_title:"Customers - Node.js",data:rows});
});
});
};
I am getting the following exception:
Express server listening on port 3000
TypeError: Object #<IncomingMessage> has no method 'getConnection'
at exports.list (C:\Users\nodeWorkspace\Test\routes\index.js:14:6)
at callbacks (C:\Users\nodeWorkspace\Test\node_modules\express\lib\router\index.js:161:37)
at param (C:\Users\nodeWorkspace\Test\node_modules\express\lib\router\index.js:135:11)
at pass (C:\Users\nodeWorkspace\Test\node_modules\express\lib\router\index.js:142:5)
at Router._dispatch (C:\Users\nodeWorkspace\Test\node_modules\express\lib\router\index.js:170:5)
at Object.router (C:\Users\nodeWorkspace\Test\node_modules\express\lib\router\index.js:33:10)
at next (C:\Users\nodeWorkspace\Test\node_modules\express\node_modules\connect\lib\proto.js:190:15)
at Object.methodOverride [as handle] (C:\Users\nodeWorkspace\Test\node_modules\express\node_modules\connect\lib\middleware\methodOverride.js:37:5)
at next (C:\Users\nodeWorkspace\Test\node_modules\express\node_modules\connect\lib\proto.js:190:15)
at multipart (C:\Users\nodeWorkspace\Test\node_modules\express\node_modules\connect\lib\middleware\multipart.js:64:37)
[90mGET / [31m500 [90m59ms
Any recommendation what I am doing wrong?
I appreciate your answer!

Looks like you used example somethink like this: http://teknosains.com/i/simple-crud-nodejs-mysql but changed code sequence.
Move app.use(app.router); under declared app.get/app.post.
Also you can use other case of mysql integration as: https://www.npmjs.com/package/express-myconnection

node.js TypeError: Object has no method get

I'm trying to separate server initiation and other calls from the core file(app.js) but when I try to run it, it issues me error that
http.createServer(app).listen(app.get('port'), function(){
^
TypeError: Object function (){ all code from app.js file }
has no method 'get'
This is app.js file.
/**
* Module dependencies.
*/
module.exports = function(){
var express = require('express');
var routes = require('./routes');
var path = require('path');
var app = express();
// all environments
app.set('port', process.env.PORT || 4000);
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));
// development only
if ('development' == app.get('env')) {
app.use(express.errorHandler());
}
app.get('/', routes.index);
return app;
};
and this is server.js file.
var http = require('http'),
app = require('./app');
http.createServer(app).listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
using express#3.4.0
what am I missing OR doing wrong.. please help.

You have no reason to return a function into your app.js file, just return the express object:
var express = require('express');
var app = express();
// ... more variables
// ... the rest of your code
module.exports = app;
Then, the rest of your code into server.js will work fine.
Remember that module.exports works like a "return" into CommonJS (and therefore NodeJS).
See documentation.

You're passing a function to module.exports, so when you require('./app'), you need to call it like a function:
var http = require('http'),
app = require('./app')();
http.createServer(app).listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});

NodeJS ReferenceError: io is not defined

I'm getting started on node JS and facing an issue with io lib, here the error :
ReferenceError: io is not defined
at exports.index (D:\dev\lib\index.js:9:5)
at callbacks (D:\dev\node_modules\express\lib\router\index.js:164:37)
at param (D:\dev\node_modules\express\lib\router\index.js:138:11)
at pass (D:\dev\node_modules\express\lib\router\index.js:145:5)
at Router._dispatch (D:\dev\node_modules\express\lib\router\index.js:1 73:5)
at Object.router (D:\dev\node_modules\express\lib\router\index.js:33:1 0)
at next (D:\dev\node_modules\express\node_modules\connect\lib\proto.js:190:15)
at Object.methodOverride [as handle] (D:\dev\node_modules\express\node_modules\connect\lib\middleware\methodOverride.js:49:5)
at next (D:\dev\node_modules\express\node_modules\connect\lib\proto.js:190:15)
at Object.urlencoded [as handle] (D:\dev\node_modules\express\node_modules\connect\lib\middleware\urlencoded.js:51:37)
Here is the content of my app.js file :
var express = require('express');
var path = require('path');
var app = express(),
server = require('http').createServer(app),
io = require('socket.io').listen(server),
fs = require('fs');
app.set('port', process.env.PORT || 8080); app.set('views',
path.join(__dirname, 'views'));
app.set('view engine', 'jade');
app.use(express.favicon()); app.use(express.logger('dev'));
app.use(express.json()); app.use(express.urlencoded());
app.use(express.methodOverride()); app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));
app.get('/', require('./lib').index);
server.listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
my file lib/index.js :
exports.index = function(req, res){
res.render('index');
io.sockets.on('connection', function (socket) {
socket.emit('message', 'welcome');
});
};
Can anyone help me?

You need to pass io to your route:
exports.index = function(io) {
return function(req,res) {
res.render('index');
io.sockets.on('connection', function (socket) {
socket.emit('message', 'welcome');
}
}
}
And then call it as a function in app.get:
app.get('/', require('./lib').index(io));
I'd recommend declaring the require('./lib') part with your other variables. This would allow for code reuse and better readability (which is relative to each person).
var /*other variables*/,
lib = require('./lib');
Then you could just do app.get('/', lib.index(io));
Just a thought.

node.js express-validator ERR_EMPTY_RESPONSE

I just try to write a simple node.js application, but if I use the express-validator the site is just loading and do nothing :(
"waiting on localhost", after some time an "ERR_EMPTY_RESPONSE" error appears.
If i delete the app.use(expressValidator) the application works again.
var express = require('express'),
expressValidator = require("express-validator");
var app = express();
app.configure(function(){
app.set('view engine', 'jade');
app.set('views', __dirname + '/views');
app.use(express.bodyParser());
app.use(expressValidator);
});
app.get('/', function(req, res) {
console.log('get something get');
res.render('app.jade');
});
app.post('/', function(req, res){
console.log('get something post');
res.render('app.jade');
});
app.listen(process.env.PORT || 8080);

You need to call the expressValidator function to get it to return a middleware handler:
app.use(expressValidator());
^^ important!