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server.js
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server.js
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var express = require('express');
var morgan = require('morgan');
var path = require('path');
var Pool = require('pg').Pool;
var crypto = require('crypto');
var bodyParser = require('body-parser');
var session = require('express-session');
var config = {
user: 'vijay14887',
database: 'vijay14887',
host: 'db.imad.hasura-app.io',
port: '5432',
password: process.env.DB_PASSWORD
}
var app = express();
app.use(morgan('combined'));
app.use(bodyParser.json());
app.use(session({
secret: 'someRandomsecretvalue',
cookie: {maxage: 1000 * 60 * 60 * 24 * 30}
}));
/*var articles= {
'article-one' : {
title: 'Article One - Vijay Kumar R',
heading: 'Article One',
date: ' Áug 3, 2017',
content: `<p>This is the content of my first article. This is the content of my first article.
</p>
<p>This is the content of my article. This is the content of my first article. This is the content of my first article.
</p>`
},
'article-two' : {
title: 'Article Two - Vijay Kumar R',
heading: 'Article Two',
date: ' Áug 4, 2017',
content: `<p>This is the content of my 2 article. This is the content of my 2 article.
</p>
<p>This is the content of my article. This is the content of my 2 article. This is the content of my 2 article.
</p>`
},
'article-three' : {
title: 'Article Three - Vijay Kumar R',
heading: 'Article Three',
date: ' Áug 5, 2017',
content: `<p>This is the content of my three article. This is the content of my three article.
</p>
<p>This is the content of my article. This is the content of my three article. This is the content of my three article.
</p>`
}
};*/
function createTemplate(data) {
var title = data.title;
var heading = data.heading;
var date = data.date;
var content = data.content;
var htmlTemplate =`<html>
<head>
<title>
${title}
</title>
<meta name="viewport" content="width=device-width, initial-scale=1" />
<link href="/ui/style.css" rel="stylesheet" />
</head>
<body>
<div class="container">
<div>
<a href="/"> Home</a>
<hr/>
<h3>
${heading}
</h3>
<div>
${date}
</div>
<div>
${content}
</div>
</div>
</div>
</body>
</html>`;
return htmlTemplate;
}
app.get('/', function (req, res) {
res.sendFile(path.join(__dirname, 'ui', 'index.html'));
});
var pool = new Pool(config);
app.get('/test-db', function(req,res) {
// make a select reqest
// return a response with the result
pool.query('SELECT * FROM article', function(err, result){
if(err){
res.status(500).send(err.toString());
} else {
res.send(JSON.stringify(result.rows));
}
});
});
var counter = 0;
app.get('/counter', function (req,res) {
counter = counter + 1;
res.send(counter.toString());
});
var names = [];
app.get('/submit-name', function(req, res) { //submit-name?name=xxxx
var name = req.query.name;
names.push(name);
// JSON - Java Script Object Notation
res.send(JSON.stringify(names));
});
app.get('/articles/:articleName', function(req, res) {
// var articleName = req.params.articleName;
pool.query("SELECT * FROM article_1 WHERE title = $1 ", [req.params.articleName], function(err, result) {
if (err){
res.status(500).send(err.toString());
} else {
if (result.rows.length === 0) {
res.status(404).send('Article Not found');
}
else{
var articleData = result.rows[0];
res.send(createTemplate(articleData));
}
}
});
});
function hash(input, salt){
var hashed = crypto.pbkdf2Sync(input, salt, 10000, 512, 'sha512');
return["pbkdf2", "10000", salt, hashed.toString('hex')].join('$');
}
app.get('/hash/:input', function (req, res) {
var hashedString = hash(req.params.input,'this-is-some-random-string')
res.send(hashedString);
});
app.post('/create-user', function(req,res) {
//username, password in JSON
var username = req.body.username;
var password = req.body.password;
var salt = crypto.randomBytes(128).toString('hex');
var dbString = hash(password,salt);
pool.query('INSERT INTO "user1" (username,password) values ($1,$2)', [username,dbString], function(err,result) {
if (err){
res.status(500).send(err.toString());
} else {
res.send('User successfully created: '+ username);
}
});
});
app.post('/login', function(req,res) {
//username, password in JSON
var username = req.body.username;
var password = req.body.password;
pool.query('SELECT * FROM "user1" WHERE username = $1', [username], function(err,result) {
if (err){
res.status(500).send(err.toString());
} else {
if(result.rows.length === 0) {
res.send(403).send('username/password is invalid');
}
else{
//Match password
dbString = result.rows[0].password;
var salt = dbString.split('$')[2];
var hashedPassword = hash(password,salt);
if( hashedPassword === dbString) {
// set session
req.session.auth = {userId: result.rows[0].id};
// set cookie with session id
// internally it maps the session id to an object on the server
// { auth: {userId}}
res.send('credentials correct!');
} else {
res.send(403).send('username/password is invalid');
}
}
}
});
});
app.get('/check-login', function(req,res) {
if (req.session && req.session.auth && req.session.auth.userId) {
res.send('You are logged in: ' + req.session.auth.userId.toString());
} else {
res.send('You are not logged in');
}
});
app.get('/logout', function(req,res) {
delete req.session.auth;
res.send('You are logged out!')
});
app.get('/ui/style.css', function (req, res) {
res.sendFile(path.join(__dirname, 'ui', 'style.css'));
});
app.get('/ui/main.js', function (req, res) {
res.sendFile(path.join(__dirname, 'ui', 'main.js'));
});
app.get('/ui/madi.png', function (req, res) {
res.sendFile(path.join(__dirname, 'ui', 'madi.png'));
});
// Do not change port, otherwise your app won't run on IMAD servers
// Use 8080 only for local development if you already have apache running on 80
var port = 80;
app.listen(port, function () {
console.log(`IMAD course app listening on port ${port}!`);
});