I am following module p-11(authentication, hashing, curl,etc) and want to do the create user but it's somehow not working.
The problem is that as soon as I am clicking on the submit button
I am getting the not a buffer error.
not sure what's wrong.
I keep getting the error : TypeError: Not a buffer
I have already required body-parser and crypto.
here's the related code in server.js:
function hash(input,salt){
//how to create hash
var hashed = crypto.pbkdf2Sync(input,salt, 10000, 512, 'sha512');
return ['pbkdf2Sync',salt,hashed.toString('hex')].join('$');
}
app.post('/create-user',function(req,res){
//take username and password as input and create entry in user table
var username = req.body.username;
var password = req.body.password;
console.log(username);
var salt= crypto.randomBytes(128).toString('hex');
var dbString = hash(password,salt);
pool.query('INSERT INTO "user"(username,password) VALUES($1,$2)',[username,dbString],function(err,result){
if(err){
res.status(500).send(err.toString());
}else{
res.send('user succesfully created'+username);
}
});
});
app.get('/hash/:input',function(req,res){
var hashString = hash(req.params.input,'this-is-some-random-string');
res.send(hashString);
});
And here's the related code in main.js
var submitButton = document.getElementById('submit_btn');
submitButton.onclick = function(){
var request = new XMLHttpRequest();
request.onreadystatechange=function(){
if(request.readyState===XMLHttpRequest.DONE && request.status ===200){
var data = JSON.parse(request.responseText);
console.log(data);
}
};
var username = document.getElementById('username').value;
var password = document.getElementById('password').value;
request.open('POST','http://localhost:8080/create-user',true);
request.send(JSON.stringify({username:username,password:password}));
};
Here's the error message I am getting
TypeError: Not a buffer
at TypeError (native)
at pbkdf2 (crypto.js:562:20)
at Object.exports.pbkdf2Sync (crypto.js:553:10)
at hash (D:\imadtw\server.js:119:23)
at D:\imadtw\server.js:129:18
at Layer.handle [as handle_request] (D:\imadtw\node_modules\express\lib\router\layer.js:95:5)
at next (D:\imadtw\node_modules\express\lib\router\route.js:131:13)
at Route.dispatch (D:\imadtw\node_modules\express\lib\router\route.js:112:3)
at Layer.handle [as handle_request] (D:\imadtw\node_modules\express\lib\router\layer.js:95:5)
at D:\imadtw\node_modules\express\lib\router\index.js:277:22
at Function.process_params (D:\imadtw\node_modules\express\lib\router\index.js:330:12)
at next (D:\imadtw\node_modules\express\lib\router\index.js:271:10)
at jsonParser (D:\imadtw\node_modules\body-parser\lib\types\json.js:112:7)
at Layer.handle [as handle_request] (D:\imadtw\node_modules\express\lib\router\layer.js:95:5)
at trim_prefix (D:\imadtw\node_modules\express\lib\router\index.js:312:13)
at D:\imadtw\node_modules\express\lib\router\index.js:280:7
EDIT: I just tried something.
the process works okay, when I hard code the values of username and password (just as an experiment), but it doesnt work when I try to get the values of username and password using req.body
seems like getting the values from body is the hard part here.
Here's the html of the page I want input values from
<!doctype html>
<html lang="en">
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- jQuery library -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<!-- Latest compiled JavaScript -->
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<!-- Fontawesome library -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css">
<link rel="stylesheet" type="text/css" href="/ui/profile.css">
<script type="text/javascript" src="/ui/main.js" ></script>
</head>
<body>
<!--Navbar Begins -->
<nav class="navbar navbar-fixed-top scrolltop" id="navigation">
<div class="container">
<!-- navbar header begins -->
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar-collapse">
<span class="sr-only">Toggle Navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Faraz Ahmed</a>
</div>
<!-- navbar header ends -->
<!-- div collapse begins -->
<div class="collapse navbar-collapse" id="navbar-collapse">
<ul class="nav navbar-nav navbar-right">
<li class="active">About</li>
<li>Portfolio</li>
<li>Contact</li>
</ul>
</div>
<!-- div collapse ends -->
</div>
<!-- container ends -->
</nav>
<!--Navbar ends -->
<div class="container-fluid">
<div class="row" id="fullBody">
<div class=" col-md-12 col-sm-12 col-xs-12" id="column-main">
<div id="aboutme" class="about">
<div class="row">
<div class="col-lg-12 col-md-12 col-sm-12">
<div id="img"><img class="img-responsive" src="http://res.cloudinary.com/whizzy/image/upload/v1454699647/faraz_qwdqrx.jpg" alt=""></div>
<!-- <hr class="hr1"><i class="fa fa-star"></i><hr class="hr2"> -->
<p class="aboutpara scrollz"></br>I am a self taught web developer who has learnt html,css, Javascript,Jquery and bootstrap too. I keep building websites and other apps to practice what I have learnt. This site is responsive. Go ahead and take a look at it in your mobile and see how they adjust to your screen size.</p>
</div>
</div>
</div><!-- aboutme div ends -->
<div class="user">
<p>
<form method="post" action="/create-user" >
<input type="text" id="username" placeholder="username">
<input type="password" id="password" name="password">
<input type="submit" id="submit_btn" value="Submit" class="btn btn-warning">
</form>
</p>
<ul id="namelist">
</ul>
</div><!-- requestz div ends -->
<div id='twitterDiv' class="row">
<div class="col-lg-12 col-md-12 col-sm-12">
<h3>Tweets Here</h3>
<input type="text" id="tweetSearch" placeholder="enter keyword to search for"></input>
<button id="tweetButton" type="submit">Submit</button>
<p id="tweetz">tweets appear here</p>
</div><!--column ends -->
</div><!--row ends -->
</div><!--2nd column ends -->
</div><!-- main row ends -->
</div><!-- container-fluid div ends -->
</body>
</html>
Make sure you're setting the correct body content type:
request.open('POST','http://localhost:8080/create-user',true);
request.setRequestHeader('content-type', 'application/json');
request.send(JSON.stringify({username:username,password:password}));
According to your html, you're not setting a name attribute for the username field. This means the field won't be sent to the server when the html form is submitted (separately from your XHR).
EDIT: this is probably unrelated to your particular issue with pbkdf2Sync() though since it doesn't consider the username value.
Related
there. I am creating a blog website and I want to post some comments on that post. but the form is reloading am not getting data to store MongoDB. I search on the internet so I got ajax but ajax is not working and this is new for me. help me out with this problem. I am using node js and ejs templating and MongoDB.
node js code
app.post("/do-comment", async (req,res) =>{
const comment = new Comment({name:req.body.name,comment:req.body.comment});
await comment.save();
await Blog.findOneAndUpdate({_id:req.body._id}, {$push: {comment}});
res.send("Comment was added successfully");
})
HTML code
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Blogs</title>
<meta name="description" content="">
<meta name="viewport" content="width=device-width, initial-scale=1">
<script src=
"https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js">
</script>
<!-- CSS only -->
<link href="https://cdn.jsdelivr.net/npm/bootstrap#5.0.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
<!-- JavaScript Bundle with Popper -->
<script src="https://cdn.jsdelivr.net/npm/bootstrap#5.0.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM" crossorigin="anonymous"></script>
</head>
<body>
<nav class="navbar navbar-expand-lg navbar-light bg-primary">
<div class="container-fluid">
<a class="navbar-brand" href="#">Blogs</a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarTogglerDemo02" aria-controls="navbarTogglerDemo02" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarTogglerDemo02">
<ul class="navbar-nav me-auto mb-2 mb-lg-0">
<li class="nav-item">
<a class="nav-link active" aria-current="page" href="#">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="/compose">compose</a>
</li>
<li class="nav-item">
<a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Disabled</a>
</li>
</ul>
<form class="d-flex">
<input class="form-control me-2" type="search" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-success" type="submit">Search</button>
</form>
</div>
</div>
</nav>
<div class="container">
<div class="col">
<img src="data:image/<%=post.image.contentType%>;base64,
<%=post.image.data.toString('base64')%>" alt="photo"width="1000px" height="500px" alt="photu">
<h1><%= post.title %></h1>
<p><%= post.content %></p>
</div>
<div class=''>
// form is here for comment
<form method="POST" onsubmit="return doComment(this);" class="theme-form-one">
<input type="hidden" name="_id" value="<%=post._id %>">
<div class="row">
<div class="col-md-6 col-12"><input type="text" name="name" placeholder="Name"></div>
<div class="col-12"><textarea name="comment" placeholder="Comments"></textarea></div>
</div>
<button class="theme-button-one">POST COMMENT</button>
</form>
</div>
//// catching comments here
<div class="">
<div class="container-fluid">
<% data.forEach(function(cData){ %>
<h1><%= cData.name %></h1>
<p><%= cData.comment %></p>
<% }) %>
</div>
</div>
</div>
//js code here
<script>
function doComment(form){
$.ajax({
url:"/post/do-comment",
method:"POST",
data:{name:form.name.value,comment:form.comment.value,
_id:form._id.value},
success: function(response){
alert(response);
}
});
return false;
}
</script>
</body>
</html>
I'm trying to get filtered data from a webform more quickly. Basically I want to use URL input to specify a date and to precheck a checkbox. I'm getting stuck with how to specify the check box as I'm not sure what the value should be.
<form action="/xxx/yyy" class="form-inline d-flex justify-content-end" method="get"> <div class="input-group input-group-lg mb-2">
<div class="input-group-prepend">
<span class="input-group-text"><i class="fa fa-calendar"></i></span>
</div>
<input type="text" name="from" value="" class="form-control datetimepicker-input" id="datetimepicker7" data-toggle="datetimepicker" data-target="#datetimepicker7" autocomplete="false">
<div class="input-group-append">
<button type="submit" class="btn btn-dark"><i class="fas fa-arrow-right"></i></button>
</div>
</div>
</form>
####snip and skip to the part of the form I wish to pre-check####
<fieldset id="departureGatewayFilters">
<div class="form-check">
<input class="form-check-input" type="checkbox" value="AMS" id="departureGatewayCheck_AMS">
<label class="form-check-label" for="departureGatewayCheck_AMS">
AMS
</label>
</div>
So far I'm using URL string: /xxx/yyy?from=2020-03-05 - what would I need next to pre-check the checkbox as well?
Thanks in advance!
Clare
Getting your checkbox checked and also getting value of the checkbox just through URL string is little bit troublesome. But you can try this :
You can assign unique name to the checkbox.
<input class="form-check-input" type="checkbox" name="checkbox_1" id="departureGatewayCheck_AMS">
And then what you can do is pass the value of checkbox through URL string. For example :
/xxx/yyy?from=2020-03-05&checkbox_1=test.
Now, using javascript you can parse URL strings and get your search params, compare it and get your checkbox checked.
<script lang="javascript">
var url_string = window.location.href ; //gets current URL
var url = new URL(url_string); // instantiate string as URL object
var c = url.searchParams.get("checkbox_1"); //get the params
if(c == "test") {
document.getElementById("departureGatewayCheck_AMS").checked = true; //checks your checkbox
}
</script>
Hope it helps ! Have a good day!
I think all you need to do is add a (checked="true") argument to your input tag your code should look like this then:
<div class="form-check">
<input class="form-check-input" checked="true" type="checkbox" value="AMS" id="departureGatewayCheck_AMS">
<label class="form-check-label" for="departureGatewayCheck_AMS">
AMS
</label>
</div>
Hope this helps
If you want to make the checkbox departureGatewayCheck_AMS checked by default, it is sufficient to edit its code like this:
<input class="form-check-input" type="checkbox" value="AMS" name="departureGatewayCheck_AMS" id="departureGatewayCheck_AMS" checked> AMS
If the checkbox is selected, since its "value" attribute is "AMS",your url (if you submit the form via GET) would be something like:
/xxx/yyy?from=2020-03-05&departureGatewayCheck_AMS=AMS
Complete solution for your requirement:-
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css">
<link href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-wvfXpqpZZVQGK6TAh5PVlGOfQNHSoD2xbE+QkPxCAFlNEevoEH3Sl0sibVcOQVnN" crossorigin="anonymous">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datetimepicker/4.17.47/css/bootstrap-datetimepicker.min.css" integrity="sha256-yMjaV542P+q1RnH6XByCPDfUFhmOafWbeLPmqKh11zo=" crossorigin="anonymous" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js">
<div class="container">
<form class="form-inline d-flex justify-content-end" method="get"> <div class="input-group input-group-lg mb-2">
<div class="input-group-prepend">
<span class="input-group-text"><i class="fa fa-calendar"></i></span>
</div>
<input type="text" name="from" value="" class="form-control datetimepicker-input" id="datetimepicker7" autocomplete="false">
<div class="input-group-append">
<button type="submit" class="btn btn-dark"><i class="fas fa-arrow-right"></i>
</button>
</div>
</div>
<fieldset id="departureGatewayFilters">
<div class="form-check">
<input class="form-check-input" name="checkname" type="checkbox" value="AMS" id="departureGatewayCheck_AMS">
<label class="form-check-label" for="departureGatewayCheck_AMS">
AMS
</label>
</div>
</fieldset>
</form>
</div>
</body>
<script type="text/javascript">
$(function () {
var url_string = "https://www.example.com/page?from=2020-12-12&checkname=1";//window.location.href ; //gets current URL
var url = new URL(url_string); // instantiate string as URL object
var date=url.searchParams.get("from");
var check = url.searchParams.get("checkname"); //get the params
alert(date);
alert(check);
if(check) {
$( "#departureGatewayCheck_AMS" ).prop( "checked", true );
}
$('.datetimepicker-input').datetimepicker({
format: 'YYYY-MM-DD',
defaultDate: date,
});
});
</script>
Just like in the question: how can I use Passport without redirecting user to the /signin or /home when he fails his authentication?
To login user has to click on "login" button, a modal will pop up, he fills the data. If he succeeds he is redirected to the homepage. But if he isn't I want to show him the flash message in the same modal without redirecting. It kinda works because if you fail to login and click "login" again the error message will be shown. But I don't want to force users to constantly click it to check what went wrong.
They should fail, see the error, fill in new data and click submit again.
home.server.route.js:
var user = require(__dirroot + '/app/controllers/user.server.controller.js')
var passport = require('passport')
module.exports = function(app) {
var home = require(__dirroot + '/app/controllers/home.server.controller.js')
app.get('/', home.render)
app.route('/home/signin')
.get(user.renderSignin)
.post(passport.authenticate('local', {
successRedirect: '/',
failureRedirect: '/',
failureFlash: true
}))
}
home.server.controller.js:
exports.render = function(req, res) {
res.render('home', {
title: 'erpeg',
messages: req.flash('error') || req.flash('info'),
srvuser: req.user ? req.user : null,
cltuser: JSON.stringify(req.user)
})
}
home.ejs:
<!doctype>
<html>
<head>
<title></title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="lib/foundation/css/normalize.css">
<link rel="stylesheet" href="lib/foundation/css/foundation.css">
<script src="https://www.google.com/recaptcha/api.js"></script>
<script src="lib/jquery/dist/jquery.min.js"></script>
</head>
<body>
<nav class="top-bar">
<ul class="title-area">
<li class="name">
<h1>
<a href="/">
<%= title %>
</a>
</h1>
</li>
<li class="toggle-topbar menu-icon">
<a href="#">
<span>Menu</span>
</a>
</li>
</ul>
<section class="top-bar-section">
<ul class="right">
<% if (srvuser) { %>
<% if(srvuser.rank == "administrator") { %>
<li>
</li>
<% } %>
<li>
<a href="/profile">
<%= srvuser.fullName %>
</a>
</li>
<li>
wyloguj
</li>
<% } else { %>
<li>
rejestruj
</li>
<li class="active">
zaloguj
</li>
<% } %>
</ul>
</section>
</nav>
<div id="signinModal" class="reveal-modal" data-reveal aria-labelledby="signinTitle" aria-hidden="true" role="dialog">
<% for (var i in messages) { %>
<div data-alert class="alert-box warning">
<p>
<%= messages[i] %>
</p>
×
</div>
<% } %>
<h1 id="signinTitle">logowanie</h1>
<form action="/home/signin", method="post">
<div class="row">
<div class="large-12 columns">
<input type="text" name="username" id="username" placeholder="nazwa użytkownia">
</div>
</div>
<div class="row">
<div class="large-12 columns">
<input type="password" name="password" id="password" placeholder="password">
</div>
</div>
<div class="row">
<div class="large-12 columns">
<input class="button expand" type="submit" value="zaloguj">
</div>
</div>
</form>
</div>
<script src="lib/modernizr/modernizr.js"></script>
<script src="./lib/foundation/js/foundation.min.js"></script>
<script src="lib/angular/angular.min.js"></script>
<script src="lib/angular-route/angular-route.min.js"></script>
<script src="lib/angular-resource/angular-resource.min.js"></script>
<script src="/user/user.client.module.js"></script>
<script src="/user/services/authentication.client.service.js"></script>
<script src="/game/game.client.module.js"></script>
<script src="/game/controllers/game.client.controller.js"></script>
<script src="/game/services/game.client.service.js"></script>
<script src="/game/config/game.client.route.js"></script>
<script src="application.js"></script>
</body>
</html>
PS: I had it working with separate pages but since I am changing my template engine from Jade to EJS I thought I will do it more elegantly (inside a modal). Any help?
I'm trying example from this site. It works fine. But if i separate views,models,routers into separate file it gives me a problem. There is 3 views. WineList view, WineListItemView and winedetails view. WineList view takes collection of wine models as model and winelistItem and winedetails view takes wine as a model.
Router's code is like this
var app = app || {};
app.AppRouter = Backbone.Router.extend({
routes:{
"":"list",
"wines/:id":"wineDetails"
},
initialize:function () {
$('#header').html(new app.HeaderView().render().el);
},
list:function () {
this.wineList = new app.WineCollection();
this.wineListView = new app.WineListView({model:this.wineList});
this.wineList.fetch();
$('#sidebar').html(this.wineListView.render().el);
},
wineDetails:function (id) {
if(this.wineList == undefined)
{
this.wineList = new app.WineCollection();
this.wineListView = new app.WineListView({model:this.wineList});
this.wineList.fetch();
$('#sidebar').html(this.wineListView.render().el);
}
this.wine = this.wineList.get(id);
if (app.router.wineView) app.router.wineView.close();
this.wineView = new app.WineView({model:this.wine});
$('#content').html(this.wineView.render().el);
}
});
On page load it fetches models from server and displays list of wines in sidebar div of page. When i click on particular wine item its details will be displayed in content div of page. That all works fine. But when i reload that page which now contains details of particular,wine model of Winedetails view gives undefined .
I'm intializing the router on main page like this
app.js
var app = app || {};
$(function() {
})
app.router = new app.AppRouter();
Backbone.history.start();
index.html
<!DOCTYPE HTML>
<html>
<head>
<title>Backbone Cellar</title>
<link rel="stylesheet" href="../css/styles.css" />
</head>
<body>
<div id="header"><span class="title">Backbone Cellar</span></div>
<div id="sidebar"></div>
<div id="content">
<h2>Welcome to Backbone Cellar</h2>
<p>
This is a sample application part of of three-part tutorial showing how to build a CRUD application with Backbone.js.
</p>
</div>
<div>
Next page
</div>
<!-- Templates -->
<script type="text/template" id="tpl-header">
<span class="title">Backbone Cellar</span>
<button class="new">New Wine</button>
</script>
<script type="text/template" id="tpl-wine-list-item">
<a href='#wines/<%= id %>'><%= name %></a>
</script>
<script type="text/template" id="tpl-wine-details">
<div class="form-left-col">
<label>Id:</label>
<input type="text" id="wineId" name="id" value="<%= id %>" disabled />
<label>Name:</label>
<input type="text" id="name" name="name" value="<%= name %>" required/>
<label>Grapes:</label>
<input type="text" id="grapes" name="grapes" value="<%= grapes %>"/>
<label>Country:</label>
<input type="text" id="country" name="country" value="<%= country %>"/>
<label>Region:</label>
<input type="text" id="region" name="region" value="<%= region %>"/>
<label>Year:</label>
<input type="text" id="year" name="year" value="<%= year %>"/>
<button class="save">Save</button>
<button class="delete">Delete</button>
</div>
<div class="form-right-col">
<img height="300" src="../pics/<%= picture %>"/>
<label>Notes:</label>
<textarea id="description" name="description"><%= description %></textarea>
</div>
</script>
<!-- JavaScript -->
<script src="js/lib/jquery.min.js"></script>
<script src="js/lib/underscore.js"></script>
<script src="js/lib/backbone.js"></script>
<script src="js/models/WineModel.js"></script>
<script src="js/collections/WineListCollection.js"></script>
<script src="js/Views/WineListView.js"></script>
<script src="js/Views/WineListItemView.js"></script>
<script src="js/Views/WineDetailsView.js"></script>
<script src="js/Views/HeaderView.js"></script>
<script src="js/routers/routers.js"></script>
<script src="js/app.js"></script>
</body>
</html>
I'm new to this backbone technology. please tell me what am i missing
this.wineList.fetch();
fires an asynchronous request to your server, which means that the content will arrive (or not) at some point after executing this line, but your application execution continues whether the response arrived or not. On page reload (assume you have wines/:id in the URL) first you have to fetch the complete list of wines before accessing any particular wine from the collection.
You have to wait until is download the collection, and access the wine with id, after this request is finished.
So after initiating the request continue your application logic in the success callback:
this.wineList.fetch({
success: function(model) {
...
this.wine = model.get(id);
...
}
});
I have to send data using socket.io.when a user enter his login and a password,he will be redirect to index.ejs and the username will be send to the server.
route.js (I mentioned only the part of the script not the hole script to show that when the login and password are correct a user get an index page and the userobject send to the index):
var index = function(req, res, next) {
if(!req.isAuthenticated()) {
res.redirect('/signin');
} else {
var user = req.user;
if(user !== undefined) {
user = user.toJSON();
}
res.render('index', {title: 'Home', user: user});
}
};
app.js:
io.sockets.on('connection', function (socket) {
socket.on("new_user",function(user1){
console.log("a new user is connected",user1);
var current_date=new Date();
var date=current_date.toString();
ex.user_connect(user1,date);
});
});
index.ejs:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width ,initial-scale=1.0" />
<title><%= title %></title>
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="style/style.css"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script src="js/bootstrap.js"></script>
</head>
<body>
<nav class="navbar navbar-inverse">
<div class="container-fluid">
<div class="navbar-header">
<a class="navbar-brand" href="/">HomePage</a>
</div>
<div>
<ul class="nav navbar-nav navbar-right">
<li><%= user.username%></li>
<li><span class="glyphicon glyphicon-log-out"></span> Sign out</li>
</ul>
</div>
</div>
</nav>
<div class="container">
<div class="jumbotron">
<div class="row">
<div class="col-sm-6">
<div class="container">
<h2>Led1</h2>
<!-- Trigger the modal with a button -->
<button type="button" class="btn btn-default btn-lg" id="led1" align="center">check it</button>
<!-- Modal -->
<div class="modal fade" id="model_led1" role="dialog">
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header" style="padding:35px 50px;">
<button type="button" class="close" data-dismiss="modal" id="close">×</button>
<h4><span class="glyphicon glyphicon-lock"></span> Settings</h4>
</div>
<div class="modal-body" style="padding:40px 50px;">
<form role="form">
<img src="style/images/led.png" id="led" class="img-responsive"/>
<button type="button" class="btn btn-success btn-block" id="led1_activ"><span class="glyphicon glyphicon-off"></span> Activate</button>
<button type="button" class="btn btn-success btn-block" id="led1_desactiv"><span class="glyphicon glyphicon-off"></span> Desactivate</button>
</form>
</div>
<div class="modal-footer">
<button type="submit" class="btn btn-danger btn-default pull-left" data-dismiss="modal" id="cancel_button"><span class="glyphicon glyphicon-remove"></span> Cancel</button>
</div>
</div>
</div>
</div>
</div>
</div>
<script src="/socket.io/socket.io.js"></script>
<script>
var socket = io.connect('http://localhost:3000');
var user1 = user.username;
socket.emit('new_user',user1);
</script>
NB:I got the username on the navbar but I don't get it on the server console.
Ejs render all template variables in server and then return plain html to the client , so
Inside your script , do you have variable global user initialized? :
var user1 = user.username // var user = {username:"foo":} ,something like that before.
If you trying to get user from template variable you could try:
var user1= "<%= user.username%>";
This will render <%= user.username%> inside script tag before send to the client ( browser)