-
Notifications
You must be signed in to change notification settings - Fork 0
/
server.js
325 lines (263 loc) · 9.29 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
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
'use strict';//strict mode
const express = require("express");
const app = express();
const path = require("path")
const multer = require("multer");
const body = require("body-parser");
const randtoken = require("rand-token");
const fs = require("fs");
const mongoose = require('mongoose');
const asyncHandler = require('express-async-handler')
const { exec } = require("child_process");
app.set('view engine', 'ejs');
app.use(express.static(__dirname + "/public"));
// app.use(express.static(__dirname + "/HTML"));
app.use(body.urlencoded({ extended: true }));
//set up database ---------------------------------------------------------------------------------------------
//connect to database "tokenDB"
mongoose.connect('mongodb://localhost:27017/userDB', { useNewUrlParser: true, useUnifiedTopology: true });
const userSchema = new mongoose.Schema({
email: String,
password: String,
userToken: String
})
//create a new collection "User", all records contains username and password will be saved in the db
const User = mongoose.model('USER', userSchema);
//create second collection to store files' location and its corresponding email account
const fileSchema = new mongoose.Schema({
email: String,
fileName: String,
fileLocation: String,
token: String
})
const fileCollection = mongoose.model('FILECOLLECTION', fileSchema);
//set up database ---------------------------------------------------------------------------------------------
//used to specify file destination on local system after uploading
let storage = multer.diskStorage({
destination: function (req, file, cb) {
// Generate a 16 character alpha-numeric token
let token = randtoken.generate(16);
console.log(token);
if (!fs.existsSync(__dirname + '/uploads/' + token)) {
fs.mkdirSync(__dirname + '/uploads/' + token);
}
cb(null, __dirname + '/uploads/' + token);
},
filename: function (req, file, cb) {
cb(null, file.originalname);
},
})
const fileFilter = (req, file, cb) => {
console.log("req: " + req)
let found = fileCollection.findOne({ filename: file.filename, email: req.body.email }).exec();
found.then((record) => {
if (!record) {
cb(null, true);
}
else {
return cb(null, false, new Error("duplicate file name"));
}
})
}
//upload can process one file each time
let upload = multer({
storage: storage, //this specify file name and destination after uploading
//check for duplicate filename before uploading
fileFilter: fileFilter
// myFile is the name of file attribute
});
app.get("/upload", function (req, res) {
res.render("upload");
})
app.get("/home/:username", function (req, res) {
let currentEmail = req.params.username;
fileCollection.find({ email: currentEmail }, function (err, files) {
if (err) {
console.log(err);
} else {
res.render("home", { files: files , email: currentEmail});
}
})
})
app.post("/uploadFileAndGetFileUrl/:userToken", asyncHandler(async (req, res) => {
let userProvidedToken = req.params.userToken;
//upload the file
let uploadFile = upload.single("myFile");
let authenticate = false;
//authenticate the userToken before uploading
const user = await User.findOne({ userToken: userProvidedToken });
async function authentication() {
if (user.userToken === userProvidedToken) {
authenticate = true;
}
}
//if authenticated, start uploading the file
async function second() {
if (authenticate) {
uploadFile(req, res, function (err) {
console.log(req.file);
if (err) {
console.log("error");
res.send(err);
}
else {
if (typeof req.file === 'undefined') {
res.status(403).send("duplicate files");
//avoid duplicate filename error
}
else {
//extracte the token
let token = req.file.destination.split('/')[2];
fileCollection.insertMany({
email: user.email, fileName: req.file.filename,
fileLocation: req.file.destination, token: token
},
function (err, record) {
if (err) {
console.log(err);
}
else {
console.log(record);
}
})
// SUCCESS, file successfully uploaded
res.status(200).send("uploaded");
}
}
})
}
else {
res.status(403).send("Wrong userToken");
}
}
await authentication();
await second();
}))
app.get('/downloadFileWithRandomUrl/:email/:token/:userToken', asyncHandler(async (req, res) => {
let authenticate = false;
let userToken = req.params.userToken;
let currentEmail = req.params.email;
//authenticate the userToken before uploading
const user = await User.findOne({ email: currentEmail });
async function authentication() {
if (user.userToken === userToken) {
authenticate = true;
}
}
async function second() {
if (authenticate) {
// Retrieve the tag from our URL path
let token = req.params.token;
//use fs module
const folder = __dirname + '/uploads/' + token;
fs.readdir(folder, (err, files) => {
//fileName is the first file(only one) under the folder
let fileName = files[0];
let dir = path.join(__dirname, 'uploads/' + token + '/' + fileName);
console.log(dir);
res.download(dir, fileName, function (error) {
console.log("Error: ", error);
});
});
}
}
await authentication();
await second();
}))
//sign in page
app.get('/', function (req, res) {
res.render("signin");
})
/**
* after successfully signing in, go to main page
*/
app.post('/login', function (req, res) {
let email = req.body.email;
let password = req.body.password;
User.findOne({ email: email }, function (err, user) {
if (err) {
console.log("error");
}
else {
if (user === null) {
res.status(403).send("email doesn't exsit!");
} else {
if (user.password === password) {
//currentEmail = email; // update current email
let userToken = randtoken.generate(20);
console.log("success");
User.updateOne({ email: email }, { userToken: userToken }).exec()
.then(function () {
res.status(200).send({email: email, userToken:userToken});
})
}
else {
res.status(403).send("Wrong password");
}
}
}
})
})
app.get("/signup", function (req, res) {
res.render("signup");
})
app.post("/signup", function (req, res) {
let email = req.body.email;
let password = req.body.password;
User.findOne({ email: email }, function (error, record) {
if (error) {
console.log(error);
}
else {
//if the record doesn't exist, then add it to the database
if (record === null) {
User.insertMany([{ email: email, password: password }], function (error, record) {
if (error) {
console.log(error);
}
else {
console.log(record);
}
})
res.redirect("/");
}
else {
console.log("Email exists. Please try again");
res.redirect("/signup");
}
}
})
})
/**
* delete a specified file
*/
app.get("/delete/:email/:token/:userToken", asyncHandler(async function (req, res) {
let authenticate = false;
let userToken = req.params.userToken;
let currentEmail = req.params.email;
//authenticate the userToken before uploading
const user = await User.findOne({ email: currentEmail });
async function authentication() {
if (user.userToken === userToken) {
authenticate = true;
}
}
async function second() {
let token = req.params.token;
fileCollection.deleteOne({ token: token }, function (err) {
if (err) {
console.log(err);
} else {
res.redirect("/home/" + currentEmail);
}
});
}
await authentication();
await second();
}))
// Take any port number of your choice which
// is not taken by any other process
app.listen(3000, function (error) {
if (error) throw error
console.log("Server created Successfully on PORT 3000")
})