94 lines
2.4 KiB
JavaScript
94 lines
2.4 KiB
JavaScript
const express = require('express');
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const app = express();
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const path = require('path');
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const bodyParser = require('body-parser');
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const mongoose = require('mongoose');
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const config = require('./config');
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const base58 = require('./base58.js');
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const log4js = require('log4js');
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const logger = log4js.getLogger();
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logger.level = 'debug';
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// grab the url model
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const Url = require('./models/url');
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mongoose.connect('mongodb://' + config.db.host + '/' + config.db.name);
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app.use(bodyParser.json());
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app.use(bodyParser.urlencoded({ extended: true }));
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app.use(express.static(path.join(__dirname, 'public')));
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app.all('/*', function(req, res, next) {
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// CORS headers
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res.header("Access-Control-Allow-Origin", "*"); // restrict it to the required domain
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res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,OPTIONS');
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// Set custom headers for CORS
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res.header('Access-Control-Allow-Headers', 'Content-type,Accept,X-Access-Token,X-Key');
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if (req.method == 'OPTIONS') {
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res.status(200).end();
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} else {
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next();
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}
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});
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app.get('/', function(req, res){
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res.sendFile(path.join(__dirname, 'views/index.html'));
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});
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app.post('/api/v1/shorten', function(req, res){
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const longUrl = req.body.url;
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let shortUrl = '';
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// check if url already exists in database
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Url.findOne({long_url: longUrl}, function (err, doc){
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if (doc){
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shortUrl = config.webhost + base58.encode(doc._id);
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// the document exists, so we return it without creating a new entry
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res.send({'shortUrl': shortUrl});
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} else {
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// since it doesn't exist, let's go ahead and create it:
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const newUrl = Url({
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long_url: longUrl
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});
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// save the new link
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newUrl.save(function(err) {
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if (err){
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logger.error(err);
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}
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shortUrl = config.webhost + base58.encode(newUrl._id);
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res.send({'shortUrl': shortUrl});
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});
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}
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});
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});
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app.get('/:encoded_id', function(req, res){
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const base58Id = req.params.encoded_id;
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const id = base58.decode(base58Id);
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// check if url already exists in database
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Url.findOneAndUpdate({_id: id}, {$inc:{visits:1}}, function (err, doc){
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if (doc) {
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logger.debug('doc', doc);
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res.redirect(doc.long_url);
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} else {
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res.redirect(config.webhost);
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}
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});
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});
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const server = app.listen(3000, function () {
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logger.info('Server listening on port 3000');
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});
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