forked from coco98/imad-2016-app
-
Notifications
You must be signed in to change notification settings - Fork 0
/
server.js
238 lines (213 loc) · 7.68 KB
/
server.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
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: 'coco98',
database: 'coco98',
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}
}));
function createTemplate (data) {
var title = data.title;
var date = data.date;
var heading = data.heading;
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>
</div>
<hr/>
<h3>
${heading}
</h3>
<div>
${date.toDateString()}
</div>
<div>
${content}
</div>
<hr/>
<h4>Comments</h4>
<div id="comment_form">
</div>
<div id="comments">
<center>Loading comments...</center>
</div>
</div>
<script type="text/javascript" src="/ui/article.js"></script>
</body>
</html>
`;
return htmlTemplate;
}
app.get('/', function (req, res) {
res.sendFile(path.join(__dirname, 'ui', 'index.html'));
});
function hash (input, salt) {
// How do we create a hash?
var hashed = crypto.pbkdf2Sync(input, salt, 10000, 512, 'sha512');
return ["pbkdf2", "10000", salt, hashed.toString('hex')].join('$');
}
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
// {"username": "tanmai", "password": "password"}
// 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 "user" (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) {
var username = req.body.username;
var password = req.body.password;
pool.query('SELECT * FROM "user" WHERE username = $1', [username], function (err, result) {
if (err) {
res.status(500).send(err.toString());
} else {
if (result.rows.length === 0) {
res.status(403).send('username/password is invalid');
} else {
// Match the password
var dbString = result.rows[0].password;
var salt = dbString.split('$')[2];
var hashedPassword = hash(password, salt); // Creating a hash based on the password submitted and the original salt
if (hashedPassword === dbString) {
// Set the session
req.session.auth = {userId: result.rows[0].id};
// set cookie with a session id
// internally, on the server side, it maps the session id to an object
// { auth: {userId }}
res.send('credentials correct!');
} else {
res.status(403).send('username/password is invalid');
}
}
}
});
});
app.get('/check-login', function (req, res) {
if (req.session && req.session.auth && req.session.auth.userId) {
// Load the user object
pool.query('SELECT * FROM "user" WHERE id = $1', [req.session.auth.userId], function (err, result) {
if (err) {
res.status(500).send(err.toString());
} else {
res.send(result.rows[0].username);
}
});
} else {
res.status(400).send('You are not logged in');
}
});
app.get('/logout', function (req, res) {
delete req.session.auth;
res.send('<html><body>Logged out!<br/><br/><a href="/">Back to home</a></body></html>');
});
var pool = new Pool(config);
app.get('/get-articles', function (req, res) {
// make a select request
// return a response with the results
pool.query('SELECT * FROM article ORDER BY date DESC', function (err, result) {
if (err) {
res.status(500).send(err.toString());
} else {
res.send(JSON.stringify(result.rows));
}
});
});
app.get('/get-comments/:articleName', function (req, res) {
// make a select request
// return a response with the results
pool.query('SELECT comment.*, "user".username FROM article, comment, "user" WHERE article.title = $1 AND article.id = comment.article_id AND comment.user_id = "user".id ORDER BY comment.timestamp DESC', [req.params.articleName], function (err, result) {
if (err) {
res.status(500).send(err.toString());
} else {
res.send(JSON.stringify(result.rows));
}
});
});
app.post('/submit-comment/:articleName', function (req, res) {
// Check if the user is logged in
if (req.session && req.session.auth && req.session.auth.userId) {
// First check if the article exists and get the article-id
pool.query('SELECT * from article 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(400).send('Article not found');
} else {
var articleId = result.rows[0].id;
// Now insert the right comment for this article
pool.query(
"INSERT INTO comment (comment, article_id, user_id) VALUES ($1, $2, $3)",
[req.body.comment, articleId, req.session.auth.userId],
function (err, result) {
if (err) {
res.status(500).send(err.toString());
} else {
res.status(200).send('Comment inserted!')
}
});
}
}
});
} else {
res.status(403).send('Only logged in users can comment');
}
});
app.get('/articles/:articleName', function (req, res) {
// SELECT * FROM article WHERE title = '\'; DELETE WHERE a = \'asdf'
pool.query("SELECT * FROM article 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));
}
}
});
});
app.get('/ui/:fileName', function (req, res) {
res.sendFile(path.join(__dirname, 'ui', req.params.fileName));
});
var port = 8080; // Use 8080 for local development because you might already have apache running on 80
app.listen(8080, function () {
console.log(`IMAD course app listening on port ${port}!`);
});