89 lines
2.2 KiB
JavaScript
89 lines
2.2 KiB
JavaScript
const https = require('https');
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const turndown = require('turndown');
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const turndownPluginGfm = require('turndown-plugin-gfm')
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const { Readability } = require('@mozilla/readability');
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const JSDOM = require('jsdom').JSDOM;
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const common_filters = require('./url_to_markdown_common_filters');
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const validURL = require('@7c/validurl');
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const express = require('express');
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const rateLimit = require('express-rate-limit');
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const port = process.env.PORT;
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const app = express();
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const service = new turndown();
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const tables = turndownPluginGfm.tables
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service.use(tables)
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const rateLimiter = rateLimit({
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windowMs: 30 * 1000,
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max: 5,
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message: 'Rate limit exceeded',
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headers: true
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});
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app.use(rateLimiter);
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app.use(express.urlencoded({
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extended: true,
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limit: '10mb'
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}));
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app.get('/', (req, res) => {
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url = req.query.url;
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if (url && validURL(url)) {
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send_headers(res);
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read_url(url, res);
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} else {
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res.status(400).send("Please specify a valid url query parameter");
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}
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});
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app.post('/', function(req, res) {
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let html = req.body.html;
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let url = req.body.url;
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if (!html) {
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res.status(400).send("Please provide a POST parameter called html");
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} else {
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//try {
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let document = new JSDOM(html);
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let markdown = process_dom(url, document, res);
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send_headers(res);
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res.send(markdown);
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//} catch (error) {
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// res.status(400).send("Could not parse that document");
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//}
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}
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});
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app.listen(port, () => {
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})
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function send_headers(res) {
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res.header("Access-Control-Allow-Origin", '*');
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res.header("Access-Control-Expose-Headers", 'X-Title');
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res.header("Content-Type", 'text/markdown');
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}
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function process_dom(url, document, res) {
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let title = document.window.document.querySelector('title');
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if (title)
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res.header("X-Title", encodeURIComponent(title.textContent));
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let reader = new Readability(document.window.document);
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let readable = reader.parse();
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let markdown = service.turndown(readable.content);
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let result = (url) ? common_filters.filter(url, markdown) : markdown;
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return result;
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}
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function read_url(url, res) {
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JSDOM.fromURL(url).then((document)=>{
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let markdown = process_dom(url, document, res);
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res.send(markdown);
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}).catch((error)=> {
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res.status(400).send("Sorry, could not fetch and convert that URL");
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});
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}
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