630 lines
20 KiB
JavaScript
630 lines
20 KiB
JavaScript
/* eslint-disable no-undef */
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/* eslint-disable no-empty */
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/* eslint-disable @typescript-eslint/explicit-function-return-type */
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/* eslint-disable @typescript-eslint/no-var-requires */
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/* eslint-disable @typescript-eslint/no-require-imports */
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require('dotenv').config();
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const Url = require('url');
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const puppeteer = require('puppeteer-extra');
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const axios = require('axios');
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const jwt = require('jsonwebtoken');
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const { promisify } = require('util');
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const signToken = promisify(jwt.sign);
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const { appleNewsHandler } = require('./apple-news-handler');
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const { twitterHandler } = require('./twitter-handler');
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const { youtubeHandler } = require('./youtube-handler');
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const { tDotCoHandler } = require('./t-dot-co-handler');
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const { pdfHandler } = require('./pdf-handler');
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const { mediumHandler } = require('./medium-handler');
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const { derstandardHandler } = require('./derstandard-handler');
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const { imageHandler } = require('./image-handler');
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const MOBILE_USER_AGENT = 'Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.62 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)'
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const DESKTOP_USER_AGENT = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 11_6_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4372.0 Safari/537.36'
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const BOT_DESKTOP_USER_AGENT = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 11_6_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4372.0 Safari/537.36'
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const NON_BOT_DESKTOP_USER_AGENT = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 11_6_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4372.0 Safari/537.36'
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const NON_BOT_HOSTS = ['bloomberg.com', 'forbes.com']
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const ALLOWED_CONTENT_TYPES = ['text/html', 'application/octet-stream', 'text/plain', 'application/pdf'];
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// Add stealth plugin to hide puppeteer usage
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const StealthPlugin = require('puppeteer-extra-plugin-stealth');
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puppeteer.use(StealthPlugin());
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const userAgentForUrl = (url) => {
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try {
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const u = new URL(url);
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for (const host of NON_BOT_HOSTS) {
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if (u.hostname.endsWith(host)) {
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return NON_BOT_DESKTOP_USER_AGENT;
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}
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}
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} catch (e) {
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console.log('error getting user agent for url', url, e)
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}
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return DESKTOP_USER_AGENT
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};
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// launch Puppeteer
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const getBrowserPromise = (async () => {
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return puppeteer.launch({
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args: [
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'--allow-running-insecure-content',
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'--autoplay-policy=user-gesture-required',
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'--disable-component-update',
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'--disable-domain-reliability',
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'--disable-features=AudioServiceOutOfProcess,IsolateOrigins,site-per-process',
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'--disable-print-preview',
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'--disable-setuid-sandbox',
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'--disable-site-isolation-trials',
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'--disable-speech-api',
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'--disable-web-security',
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'--disk-cache-size=33554432',
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'--enable-features=SharedArrayBuffer',
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'--hide-scrollbars',
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'--ignore-gpu-blocklist',
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'--in-process-gpu',
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'--mute-audio',
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'--no-default-browser-check',
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'--no-pings',
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'--no-sandbox',
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'--no-zygote',
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'--use-gl=swiftshader',
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'--window-size=1920,1080', // https://source.chromium.org/search?q=lang:cpp+symbol:kWindowSize&ss=chromium
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process.env.LAUNCH_HEADLESS ? '--single-process' : '--start-maximized',
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],
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defaultViewport: { height: 1080, width: 1920 },
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executablePath: process.env.CHROMIUM_PATH ,
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headless: !!process.env.LAUNCH_HEADLESS,
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timeout: 0,
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userDataDir: '/tmp/puppeteer',
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});
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})();
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let logRecord, functionStartTime;
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const uploadToSignedUrl = async ({ id, uploadSignedUrl }, contentType, contentObjUrl) => {
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const stream = await axios.get(contentObjUrl, { responseType: 'stream' });
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return await axios.put(uploadSignedUrl, stream.data, {
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headers: {
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'Content-Type': contentType,
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},
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maxBodyLength: 1000000000,
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maxContentLength: 100000000,
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})
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};
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const getUploadIdAndSignedUrl = async (userId, url) => {
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const auth = await signToken({ uid: userId }, process.env.JWT_SECRET);
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const data = JSON.stringify({
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query: `mutation UploadFileRequest($input: UploadFileRequestInput!) {
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uploadFileRequest(input:$input) {
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... on UploadFileRequestError {
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errorCodes
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}
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... on UploadFileRequestSuccess {
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id
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uploadSignedUrl
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}
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}
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}`,
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variables: {
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input: {
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url,
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contentType: 'application/pdf',
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}
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}
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});
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const response = await axios.post(`${process.env.REST_BACKEND_ENDPOINT}/graphql`, data,
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{
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headers: {
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Cookie: `auth=${auth};`,
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'Content-Type': 'application/json',
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},
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});
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return response.data.data.uploadFileRequest;
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};
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const uploadPdf = async (url, userId) => {
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validateUrlString(url);
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const uploadResult = await getUploadIdAndSignedUrl(userId, url);
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await uploadToSignedUrl(uploadResult, 'application/pdf', url);
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return uploadResult.id;
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};
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const sendCreateArticleMutation = async (userId, input) => {
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const data = JSON.stringify({
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query: `mutation CreateArticle ($input: CreateArticleInput!){
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createArticle(input:$input){
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... on CreateArticleSuccess{
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createdArticle{
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id
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}
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}
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... on CreateArticleError{
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errorCodes
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}
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}
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}`,
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variables: {
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input: Object.assign({}, input , { source: 'puppeteer-parse' }),
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},
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});
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const auth = await signToken({ uid: userId }, process.env.JWT_SECRET);
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const response = await axios.post(`${process.env.REST_BACKEND_ENDPOINT}/graphql`, data,
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{
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headers: {
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Cookie: `auth=${auth};`,
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'Content-Type': 'application/json',
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},
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});
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console.log('response', response);
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return response.data.data.createArticle;
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};
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const saveUploadedPdf = async (userId, url, uploadFileId, articleSavingRequestId) => {
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return sendCreateArticleMutation(userId, {
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url: encodeURI(url),
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articleSavingRequestId,
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uploadFileId: uploadFileId,
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},
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);
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};
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const handlers = {
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'pdf': pdfHandler,
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'apple-news': appleNewsHandler,
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'twitter': twitterHandler,
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'youtube': youtubeHandler,
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't-dot-co': tDotCoHandler,
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'medium': mediumHandler,
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'derstandard': derstandardHandler,
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'image': imageHandler,
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};
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async function fetchContent(req, res) {
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functionStartTime = Date.now();
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let url = getUrl(req);
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const userId = (req.query ? req.query.userId : undefined) || (req.body ? req.body.userId : undefined);
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const articleSavingRequestId = (req.query ? req.query.saveRequestId : undefined) || (req.body ? req.body.saveRequestId : undefined);
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console.log('user id', userId, 'url', url)
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logRecord = {
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url,
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userId,
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articleSavingRequestId,
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labels: {
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source: 'parseContent',
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},
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};
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console.log(`Article parsing request`, logRecord);
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if (!url) {
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logRecord.urlIsInvalid = true;
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console.log(`Valid URL to parse not specified`, logRecord);
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return res.sendStatus(400);
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}
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// if (!userId || !articleSavingRequestId) {
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// Object.assign(logRecord, { invalidParams: true, body: req.body, query: req.query });
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// console.log(`Invalid parameters`, logRecord);
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// return res.sendStatus(400);
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// }
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// Before we run the regular handlers we check to see if we need tp
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// pre-resolve the URL. TODO: This should probably happen recursively,
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// so URLs can be pre-resolved, handled, pre-resolved, handled, etc.
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for (const [key, handler] of Object.entries(handlers)) {
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if (handler.shouldResolve && handler.shouldResolve(url)) {
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try {
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url = await handler.resolve(url);
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validateUrlString(url);
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} catch (err) {
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console.log('error resolving url with handler', key, err);
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}
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break;
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}
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}
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// Before we fetch the page we check the handlers, to see if they want
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// to perform a prefetch action that can modify our requests.
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// enumerate the handlers and see if any of them want to handle the request
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const handler = Object.keys(handlers).find(key => {
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try {
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return handlers[key].shouldPrehandle(url)
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} catch (e) {
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console.log('error with handler: ', key, e);
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}
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return false;
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});
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var title = undefined;
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var content = undefined;
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var contentType = undefined;
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if (handler) {
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try {
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// The only handler we have now can modify the URL, but in the
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// future maybe we let it modify content. In that case
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// we might exit the request early.
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console.log('pre-handling url with handler: ', handler);
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const result = await handlers[handler].prehandle(url);
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if (result && result.url) {
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url = result.url
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validateUrlString(url);
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}
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if (result && result.title) { title = result.title }
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if (result && result.content) { content = result.content }
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if (result && result.contentType) { contentType = result.contentType }
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} catch (e) {
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console.log('error with handler: ', handler, e);
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}
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}
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var context, page, finalUrl;
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if ((!content || !title) && contentType !== 'application/pdf') {
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const result = await retrievePage(url)
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if (result && result.context) { context = result.context }
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if (result && result.page) { page = result.page }
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if (result && result.finalUrl) { finalUrl = result.finalUrl }
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if (result && result.contentType) { contentType = result.contentType }
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} else {
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finalUrl = url
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}
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try {
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if (contentType === 'application/pdf') {
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const uploadedFileId = await uploadPdf(finalUrl, userId);
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const l = await saveUploadedPdf(userId, finalUrl, uploadedFileId, articleSavingRequestId);
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} else {
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if (!content || !title) {
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const result = await retrieveHtml(page);
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title = result.title;
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content = result.domContent;
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} else {
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console.log('using prefetched content and title');
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console.log(content);
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}
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logRecord.fetchContentTime = Date.now() - functionStartTime;
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const apiResponse = await sendCreateArticleMutation(userId, {
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url: finalUrl,
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articleSavingRequestId,
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preparedDocument: {
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document: content,
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pageInfo: {
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title,
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canonicalUrl: finalUrl,
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},
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},
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skipParsing: !content,
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});
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logRecord.totalTime = Date.now() - functionStartTime;
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logRecord.result = apiResponse.createArticle;
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console.log(`parse-page`, logRecord);
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// return res.send({
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// url: finalUrl,
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// articleSavingRequestId,
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// preparedDocument: {
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// document: content,
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// pageInfo: {
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// title,
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// canonicalUrl: finalUrl,
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// },
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// },
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// skipParsing: !content,
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// timeTaken: Date.now() - functionStartTime,
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// })
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}
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} catch (e) {
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console.log('error', e)
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logRecord.error = e.message;
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console.log(`Error while retrieving page`, logRecord);
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return res.sendStatus(503);
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} finally {
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if (context) {
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await context.close();
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}
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}
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return res.sendStatus(200);
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}
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function validateUrlString(url) {
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const u = new URL(url);
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// Make sure the URL is http or https
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if (u.protocol !== 'http:' && u.protocol !== 'https:') {
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throw new Error('Invalid URL protocol check failed')
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}
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// Make sure the domain is not localhost
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if (u.hostname === 'localhost' || u.hostname === '0.0.0.0') {
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throw new Error('Invalid URL is localhost')
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}
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// Make sure the domain is not a private IP
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if (/^(10|172\.16|192\.168)\..*/.test(u.hostname)) {
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throw new Error('Invalid URL is private ip')
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}
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}
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function getUrl(req) {
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console.log('body', req.body)
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const urlStr = (req.query ? req.query.url : undefined) || (req.body ? req.body.url : undefined);
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if (!urlStr) {
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throw new Error('No URL specified');
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}
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validateUrlString(urlStr);
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const parsed = Url.parse(urlStr);
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return parsed.href;
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}
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async function blockResources(page) {
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const blockedResources = [
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// Assets
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'*/favicon.ico',
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'.css',
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'.jpg',
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'.jpeg',
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'.png',
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'.svg',
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'.woff',
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// Analytics and other fluff
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'*.optimizely.com',
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'everesttech.net',
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'userzoom.com',
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'doubleclick.net',
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'googleadservices.com',
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'adservice.google.com/*',
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'connect.facebook.com',
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'connect.facebook.net',
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'sp.analytics.yahoo.com',
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]
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await page._client.send('Network.setBlockedURLs', { urls: blockedResources });
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}
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async function retrievePage(url) {
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validateUrlString(url);
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const browser = await getBrowserPromise;
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logRecord.timing = { ...logRecord.timing, browserOpened: Date.now() - functionStartTime };
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const context = await browser.createIncognitoBrowserContext();
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const page = await context.newPage();
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await page.setUserAgent(userAgentForUrl(url));
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const client = await page.target().createCDPSession();
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// intercept request when response headers was received
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await client.send('Network.setRequestInterception', {
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patterns: [
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{
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urlPattern: '*',
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resourceType: 'Document',
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interceptionStage: 'HeadersReceived',
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},
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],
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});
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const path = require('path');
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const download_path = path.resolve('./download_dir/');
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await page._client.send('Page.setDownloadBehavior', {
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behavior: 'allow',
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userDataDir: './',
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downloadPath: download_path,
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})
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client.on('Network.requestIntercepted', async e => {
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const headers = e.responseHeaders || {};
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const [contentType] = (headers['content-type'] || headers['Content-Type'] || '')
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.toLowerCase()
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.split(';');
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const obj = { interceptionId: e.interceptionId };
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if (e.responseStatusCode >= 200 && e.responseStatusCode < 300) {
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// We only check content-type on success responses
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// as it doesn't matter what the content type is for things
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// like redirects
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if (contentType && !ALLOWED_CONTENT_TYPES.includes(contentType)) {
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obj['errorReason'] = 'BlockedByClient';
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}
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}
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try {
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await client.send('Network.continueInterceptedRequest', obj);
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// eslint-disable-next-line no-empty
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} catch {}
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});
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await blockResources(page);
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/*
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* Disallow MathJax from running in Puppeteer and modifying the document,
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* we shall instead run it in our frontend application to transform any
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* mathjax content when present.
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*/
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await page.setRequestInterception(true);
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let requestCount = 0;
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page.on('request', request => {
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if (['font', 'image', 'stylesheet', 'script', 'media'].includes(request.resourceType())) {
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request.abort();
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return;
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}
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if (requestCount++ > 100) {
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request.abort();
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return;
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}
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request.continue();
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});
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// Puppeteer fails during download of PDf files,
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// so record the failure and use those items
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let lastPdfUrl = undefined;
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page.on('response', response => {
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if (response.headers()['content-type'] === 'application/pdf') {
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lastPdfUrl = response.url();
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}
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});
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try {
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const response = await page.goto(url, { waitUntil: ['networkidle2'] });
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const finalUrl = response.url();
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const contentType = response.headers()['content-type'];
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logRecord.finalUrl = response.url();
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logRecord.contentType = response.headers()['content-type'];
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return { context, page, response, finalUrl: finalUrl, contentType: contentType };
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} catch (error) {
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if (lastPdfUrl) {
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return { context, page, finalUrl: lastPdfUrl, contentType: 'application/pdf' };
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}
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throw error;
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}
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}
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async function retrieveHtml(page) {
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let domContent = '', title;
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try {
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title = await page.title();
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logRecord.title = title;
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const pageScrollingStart = Date.now();
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/* scroll with a 5 second timeout */
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await Promise.race([
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new Promise(resolve => {
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(async function () {
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try {
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await page.evaluate(`(async () => {
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/* credit: https://github.com/puppeteer/puppeteer/issues/305 */
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return new Promise((resolve, reject) => {
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let scrollHeight = document.body.scrollHeight;
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let totalHeight = 0;
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let distance = 500;
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let timer = setInterval(() => {
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window.scrollBy(0, distance);
|
|
totalHeight += distance;
|
|
if(totalHeight >= scrollHeight){
|
|
clearInterval(timer);
|
|
resolve(true);
|
|
}
|
|
}, 10);
|
|
});
|
|
})()`);
|
|
} catch (e) {
|
|
logRecord.scrollError = true;
|
|
} finally {
|
|
resolve(true);
|
|
}
|
|
})();
|
|
}),
|
|
page.waitForTimeout(1000), //5 second timeout
|
|
]);
|
|
logRecord.timing = { ...logRecord.timing, pageScrolled: Date.now() - pageScrollingStart };
|
|
|
|
const iframes = {};
|
|
const urls = [];
|
|
const framesPromises = [];
|
|
const allowedUrls = /instagram\.com/gi;
|
|
|
|
for (const frame of page.mainFrame().childFrames()) {
|
|
if (frame.url() && allowedUrls.test(frame.url())) {
|
|
urls.push(frame.url());
|
|
framesPromises.push(frame.evaluate(el => el.innerHTML, await frame.$('body')));
|
|
}
|
|
}
|
|
|
|
(await Promise.all(framesPromises)).forEach((frame, index) => (iframes[urls[index]] = frame));
|
|
|
|
const domContentCapturingStart = Date.now();
|
|
// get document body with all hidden elements removed
|
|
domContent = await page.evaluate(iframes => {
|
|
const BI_SRC_REGEXP = /url\("(.+?)"\)/gi;
|
|
|
|
Array.from(document.body.getElementsByTagName('*')).forEach(el => {
|
|
const style = window.getComputedStyle(el);
|
|
|
|
// Removing blurred images since they are mostly the copies of lazy loaded ones
|
|
if (['img', 'image'].includes(el.tagName.toLowerCase())) {
|
|
const filter = style.getPropertyValue('filter');
|
|
if (filter && filter.startsWith('blur')) {
|
|
el.parentNode && el.parentNode.removeChild(el);
|
|
}
|
|
}
|
|
|
|
// convert all nodes with background image to img nodes
|
|
if (!['', 'none'].includes(style.getPropertyValue('background-image'))) {
|
|
const filter = style.getPropertyValue('filter');
|
|
// avoiding image nodes with a blur effect creation
|
|
if (filter && filter.startsWith('blur')) {
|
|
el && el.parentNode && el.parentNode.removeChild(el);
|
|
} else {
|
|
const matchedSRC = BI_SRC_REGEXP.exec(style.getPropertyValue('background-image'));
|
|
// Using "g" flag with a regex we have to manually break down lastIndex to zero after every usage
|
|
// More details here: https://stackoverflow.com/questions/1520800/why-does-a-regexp-with-global-flag-give-wrong-results
|
|
BI_SRC_REGEXP.lastIndex = 0;
|
|
|
|
if (matchedSRC && matchedSRC[1] && !el.src) {
|
|
// Replacing element only of there are no content inside, b/c might remove important div with content.
|
|
// Article example: http://www.josiahzayner.com/2017/01/genetic-designer-part-i.html
|
|
// DIV with class "content-inner" has `url("https://resources.blogblog.com/blogblog/data/1kt/travel/bg_container.png")` background image.
|
|
if (el.innerHTML.length < 25) {
|
|
const img = document.createElement('img');
|
|
img.src = matchedSRC[1];
|
|
el && el.parentNode && el.parentNode.removeChild(el);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (el.tagName === 'IFRAME') {
|
|
if (iframes[el.src]) {
|
|
const newNode = document.createElement('div');
|
|
newNode.className = 'omnivore-instagram-embed';
|
|
newNode.innerHTML = iframes[el.src];
|
|
el && el.parentNode && el.parentNode.replaceChild(newNode, el);
|
|
}
|
|
}
|
|
});
|
|
return document.documentElement.innerHTML;
|
|
}, iframes);
|
|
logRecord.puppeteerSuccess = true;
|
|
logRecord.timing = {
|
|
...logRecord.timing,
|
|
contenCaptured: Date.now() - domContentCapturingStart,
|
|
};
|
|
|
|
// [END puppeteer-block]
|
|
} catch (e) {
|
|
if (e.message.startsWith('net::ERR_BLOCKED_BY_CLIENT at ')) {
|
|
logRecord.blockedByClient = true;
|
|
} else {
|
|
logRecord.puppeteerSuccess = false;
|
|
logRecord.puppeteerError = {
|
|
message: e.message,
|
|
stack: e.stack,
|
|
};
|
|
}
|
|
}
|
|
return { domContent, title };
|
|
}
|
|
|
|
module.exports = fetchContent;
|