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how can i get run time in javascript?

I wrote the code to receive data from the device using serial communication device with window.
I can see Continuous data in Console window in eclipse and save data in txt file.
Data transfer continues until the port is disconnected
I want to see time that Data is transmitted .
Finally, I want to get a time-data graph , so Time data is needed
How do I write code? The code below is the code I wrote
/**
* Module dependencies.
*/
var express = require('express')
, routes = require('./routes')
, user = require('./routes/user')
, http = require('http')
, path = require('path');
var app = express();
var SerialPort = require('serialport');
var UrlParser = require('url');
var fs = require('fs');
var readline = require('readline');
// all environments
app.set('port', process.env.PORT || 3000);
app.set('views', __dirname + '/views');
app.set('view engine', 'ejs');
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);
app.get('/users', user.list);
http.createServer(app).listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
var port = new SerialPort("COM32" , {
baudRate:9600,
});
port.on("open" , function(){
console.log('open success');
});
port.on('data', function(data) {
converted_data = parseFloat(data);
console.log(converted_data);
fs.appendFile('TestDB.sql',converted_data + '\r\n',function(err) {
if(err)
console.log(err);
else
console.log('data->db');
});
});
port.write("mon 1\n", function(){
console.log('write to device');
});
app.get('/data', function (req,res) {
res.redirect('http://localhost:3000/data.html');

Can't seem to render a page through express

I'm trying to render an html page with express. Here's what I have so far:
var express = require('express');
var app = express();
app.use(express.static(__dirname + '/public'));
app.set('view engine', 'ejs');
app.listen(3000, function() {
console.log('listening on PORT 3000');
})
app.get('/', function(req, res){
res.send('Home page!')
})
app.get('/events', function(req, res){
res.render('eventForm')
})
my file tree so far:
-Project
-node_modules
-public
index.html
-views
eventForm.html
I tried putting the eventForm.html in public as well but for some reason my server can't "find" it. I get the following error:
Error: Failed to lookup view "eventForm" in views directory "/Users/username/LearnProgramming/api_playground/stubhub/views"

set your views before setting view engine
app.set('views', path.join(__dirname, 'views'));

var express = require('express');
var app = express();
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
app.listen(3000, function() {
console.log('listening on PORT 3000');
})
app.get('/', function(req, res){
res.send('Home page!')
})
app.get('/events', function(req, res){
res.render('eventForm')
})
app.use(express.static(__dirname + '/public'));

How about eventForm with .html?

Using Socket.io with Node.js, Express and Jade

I have some trouble to use Socket.io even just to test if a client is connected. I've tried many things and I think that my mistake is, maybe, when I do the app.get function. I have also tried to do this in an route js file but it wasn't conclusive neither. So here are my different codes :
App.js
/**
* Module dependencies.
*/
var express = require('express');
var routes = require('./routes');
var user = require('./routes/user');
var http = require('http');
var path = require('path');
var mongo = require('mongodb');
var monk = require('monk');
var db = monk('mongodb://xxxxx:xxxxx#ds051067.mongolab.com:51067/jdo');
var app = express(),
server = http.createServer(app) ,
io = require('socket.io').listen(server);
// all environments
app.set('port', process.env.PORT || 3000);
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(express.cookieParser('This is secret'));
app.use(express.session());
app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));
// development only
if ('development' == app.get('env')) {
app.use(express.errorHandler());
}
io.sockets.on('connection', function (socket) {
console.log('Un client est connecté !');
});
// app.get('/', routes.index);
app.get('/users', user.list);
app.get('/deplacement',routes.deplacement);
app.get('/monCompte', routes.compte);
app.get('/connexion', routes.connexion);
app.get('/', function(req, res) {
res.render('index.jade');
});
server.listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
Index.jade
extends layout
block content
script(src="/socket.io/socket.io.js").
var socket = io.connect('http://localhost:3000');
});
PS : Sorry if my english is bad ^^

You can't use inline javascript in the same script tag as an included script.
extends layout
block content
script(src="/socket.io/socket.io.js")
script.
var socket = io.connect('http://localhost:3000');

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!