60 |
61 |
62 | 6. Start the Server: `$ node app.js`
63 | 7. Visit http://localhost:3000/
64 |
65 | Enjoy! :blue_heart:
66 |
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/views/index.html:
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1 |
2 |
3 |
4 |
5 |
15 |
56 |
57 |
58 |
59 |
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/routes/index.js:
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1 | const router = require('express').Router();
2 | const path = require('path');
3 | const validUrl = require('valid-url');
4 | const URL = require('../models/UrlModel.js')
5 |
6 | //Creates a 5 digit random number between 10000 and 99999
7 | const random5DigitNum = () => {
8 | return Math.floor(Math.random() * 90000) + 10000;
9 | }
10 |
11 | //Checks if the url is valid before trying to access routes that access the database
12 | router.use('/new/*', (req, res, next) => {
13 | const url = req.params[0];
14 | const response = { error: "Your url is invalid or in the wrong format. Verify that a valid protocol (http or https) is part of the url." };
15 | if (validUrl.isUri(url)) {
16 | req.uri = url;
17 | next();
18 | }else {
19 | res.json(response);
20 | }
21 | });
22 |
23 | router.route('/new/*')
24 | //currently not working with PUT or POST
25 | .get((req, res) => {
26 | const shortenedUrl = random5DigitNum();
27 | URL.findOneAndUpdate(
28 | {original: req.uri}, // filter
29 | {$push: { shortened: shortenedUrl} }, // update
30 | {upsert: true, new: true, runValidators: true}, // options
31 | function (err, doc) { // callback
32 | if (err) {
33 | res.status(500).send(err);
34 | }else {
35 | let reqBaseUrl = req.protocol + '://' + req.get('host');
36 | let response = {
37 | original_url: doc.original,
38 | shortened_url: `${reqBaseUrl}/${shortenedUrl}`
39 | };
40 | res.json(response);
41 | }
42 | }
43 | );
44 | });
45 |
46 | //Checks that the passed shortened url is a digit value before querying the database.
47 | router.use('/:shortenedURL/', (req, res, next) => {
48 | const isNumber = /^\d+$/.test(req.params.shortenedURL);
49 | const response = { error: "The shortened url is in the wrong format. Verify that passed shortened URL is a digit value." };
50 | if (isNumber){
51 | next();
52 | }else {
53 | res.json(response);
54 | }
55 | });
56 |
57 | router.route('/:shortenedURL/')
58 | .get((req, res) => {
59 | const shortenedURL = req.params.shortenedURL;
60 | var queryDoc = { shortened: shortenedURL};
61 | var select = 'original';
62 | URL.findOne(queryDoc, select, (err, url) => {
63 | if (err) {
64 | res.status(500).send(err);
65 | } else if (url) {
66 | res.redirect(301, url.original);
67 | } else {
68 | const response = { error: "This shortened url is not in the database" };
69 | res.json(response);
70 | }
71 | });
72 | });
73 |
74 | module.exports = router;
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16 |
29 | 30 |
47 |
55 | URL Shortener Microservice 💙
17 |18 | This service accepts a URL as a parameter and will check whether it follows the valid http://www.example.com format. 19 | If the URL is valid, it will return both the original URL and shortened URL in the JSON response. If it is not, 20 | the JSON response will contain an error instead. When you visit that shortened URL, it will redirect you to the original link. 21 |
22 | 23 |Example Creation Usage
24 |Pass the URL to path https://url-shortener-microsrvc.herokuapp.com/new/[URL] as below:
25 | 26 |Valid URL example
27 |https://url-shortener-microsrvc.herokuapp.com/new/https://www.github.com
28 | 29 | 30 |
Example Creation Output
31 |Valid URL example JSON response
32 |{
33 |
original_url: "https://www.github.com",
34 |
35 | shortened_url: "https://url-shortener-microsrvc.herokuapp.com/29183"
36 |
37 | }
38 |
39 |
40 | Usage:
41 |Visiting the shortened URL: https://url-shortener-microsrvc.herokuapp.com/29183 42 | will redirect to:https://www.github.com
43 | 44 |Enjoy! 💙
45 | 46 |