180 lines
5.2 KiB
JavaScript
180 lines
5.2 KiB
JavaScript
const fastify = require('fastify')({ logger: true })
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var uniqid = require('uniqid');
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require('dotenv').config()
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let config = {
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domain: process.env.DOMAIN || "localhost:3000",
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https: (process.env.SSL === 'true') || false,
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recognizeProviders: (process.env.RECOGNIZE_PROVIDERS === 'true') || true,
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getBaseUrl() {
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if (config.https) {
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return `https://${config.domain}`;
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}
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return `http://${config.domain}`;
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}
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}
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const knex = require('knex')({
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client: 'sqlite3',
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connection: {
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filename: "./dev.sqlite3"
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}
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});
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//Basic home route
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fastify.get('/', async (request, reply) => {
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return { hello: 'world' }
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})
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//Automagic Amazn redirects on /a/
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fastify.get('/a/:id', async (req, res) => {
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res.redirect(302, `https://amazon.de/dp/${req.params.id}`)
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})
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//Automagic Youtube redirects on /yt/
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fastify.get('/yt/:id', async (req, res) => {
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res.redirect(302, `https://youtu.be/${req.params.id}`)
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})
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//Automagic Youtube redirects on /ytpl/
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fastify.get('/ytpl/:id', async (req, res) => {
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res.redirect(302, `https://youtube.com/playlist?list=${req.params.id}`)
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})
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//Normal shorturls
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fastify.get('/:shortcode', async (req, res) => {
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const shortcode = req.params.shortcode;
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//This should never happen but better safe than 500
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if (!shortcode) {
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return 404;
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}
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const target = await knex.select('target')
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.from('urls')
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.where('shortcode', '=', shortcode)
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.limit(1);
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if (!target[0]) {
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return 404
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}
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res.redirect(302, target[0].target)
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})
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//Create new url schema
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const newUrlSchema = {
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body: {
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type: 'object',
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properties: {
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target: { type: 'string' },
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shortcode: { type: 'string' },
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}
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}
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};
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//Create new url route
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fastify.post('/new', { newUrlSchema }, async (req, res) => {
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const target = req.body?.target;
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let shortcode = req.body?.shortcode;
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//Check if the user provided a target
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if (!target) {
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res.statusCode = 400;
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return "Missing target";
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}
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/**
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* If no custom shortcode is provided: Check if a code for the target already exists.
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* If it exists: No new get's generated => The existing code get's used.
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* If it doesn't exist: Generate a new code and proceed to creating a new db entry.
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*/
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if (!shortcode) {
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if (config.recognizeProviders) {
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const response = checkKnownProviders(target);
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if (response) {
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return response;
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}
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}
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const exists = await knex.select('shortcode')
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.from('urls')
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.where('target', '=', target)
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.limit(1);
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if (exists.length != 0) {
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shortcode = exists[0].shortcode;
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return {
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url: `${config.getBaseUrl()}/${shortcode}`,
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shortcode,
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target
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}
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}
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shortcode = uniqid();
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}
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/**
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* If a custom shortcode is provided: Check for collisions.
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* Collision detected: Warn user
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* No collision: Proceed to db entry creation
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*/
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else {
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const exists = await knex.select('shortcode')
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.from('urls')
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.where('shortcode', '=', shortcode)
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.limit(1);
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if (exists.length != 0) {
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res.statusCode = 400;
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return "Shortcode already exists, please choose another code";
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}
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}
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//Create a new db entry
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await knex('urls').insert({ target, shortcode });
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return {
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url: `${config.getBaseUrl()}/${shortcode}`,
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shortcode,
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target
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}
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});
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/**
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* Checks for some default providers with custom url schemes (amazon and youtube r/n)
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* @param {string} target The target URL
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* @returns Standard shortening response if provider recognized or null
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*/
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function checkKnownProviders(target) {
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const youtubeVideoID = target.match(/(?:youtube(?:-nocookie)?\.com\/(?:[^\/\n\s]+\/\S+\/|(?:v|e(?:mbed)?)\/|\S*?[?&]v=)|youtu\.be\/)([a-zA-Z0-9_-]{11})/)
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if (youtubeVideoID) {
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const shortcode = `yt/${youtubeVideoID[1]}`
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return {
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url: `${config.getBaseUrl()}/${shortcode}`,
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shortcode,
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target
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}
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}
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const youtubePlaylistID = target.match(/(?:youtube(?:-nocookie)?\.com\/)playlist\?(?:.*)list=([a-zA-Z0-9_-]*)(?:&.*|)/)
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if (youtubePlaylistID) {
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const shortcode = `ytpl/${youtubePlaylistID[1]}`
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return {
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url: `${config.getBaseUrl()}/${shortcode}`,
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shortcode,
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target
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}
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}
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const amazonID = target.match(/https?:\/\/(www|smile|)\.?(amazon|smile)\.(de)(?:(?:\/.*\/|\/)(?:dp|gp))(\/product\/|\/)([A-Z0-9]+)/);
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if (amazonID) {
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const shortcode = `a/${amazonID[5]}`
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return {
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url: `${config.getBaseUrl()}/${shortcode}`,
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shortcode,
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target
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}
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}
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return null;
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}
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// Run the server!
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const start = async () => {
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try {
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await fastify.listen(3000)
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} catch (err) {
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fastify.log.error(err)
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process.exit(1)
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}
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}
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start() |