3136 lines
119 KiB
JavaScript
3136 lines
119 KiB
JavaScript
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/*eslint-env es6:false*/
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/*
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* Copyright (c) 2010 Arc90 Inc
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* This code is heavily based on Arc90's readability.js (1.7.1) script
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* available at: http://code.google.com/p/arc90labs-readability
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*/
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var parseSrcset = require('parse-srcset');
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var htmlEntities = require('html-entities')
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const axios = require("axios");
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/** Checks whether an element is a wrapper for tweet */
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const hasTweetInChildren = element => {
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if (element.getElementsByClassName === undefined) {
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return false;
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}
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const candidates = element.getElementsByClassName('tweet-placeholder');
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return candidates.length > 0;
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};
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const parentClassIncludes = (element, className) => {
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let parent = element.parentElement || element.parentNode;
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while (parent && parent.tagName !== 'BODY') {
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if (parent.className.includes(className)) {
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return true;
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}
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parent = parent.parentElement || parent.parentNode;
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}
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return false;
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};
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/** Some articles might have published date listed alongside author, for instance 'John DoeMarch 15, 2015' */
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const extractPublishedDateFromAuthor = (author)=> {
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if (!author) {
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return [null, null];
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}
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const authorName = author.replace(/^by\s+/i, '');
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const regex = /(January|February|March|April|May|June|July|August|September|October|November|December)\s\d{1,2},\s\d{2,4}/i;
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const chineseDateRegex = /(\d{2,4})年(\d{1,2})月(\d{1,2})日/;
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// English date
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if (regex.test(author)) {
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const match = author.match(regex) || [];
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return [authorName.replace(regex, ''), match[0]];
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}
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// Chinese date
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if (chineseDateRegex.test(author)) {
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const match = author.match(chineseDateRegex);
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if (match) {
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const year = parseInt(match[1], 10);
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const month = parseInt(match[2], 10) - 1; // January is 0 in JavaScript Date
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const day = parseInt(match[3], 10);
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const publishedAt = new Date(year, month, day);
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return [authorName.replace(chineseDateRegex, ''), publishedAt];
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}
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}
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return [authorName, null];
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};
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// extract published date from url if it's in the format of yyyy/mm/dd or yyyy-mm-dd
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const extractPublishedDateFromUrl = (url) => {
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if (!url) return null;
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const regex = /(\d{4})(\/|-)(\d{2})(\/|-)(\d{2})/i;
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const match = url.match(regex);
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if (match) {
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const year = parseInt(match[1], 10);
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const month = parseInt(match[3], 10) - 1; // January is 0 in JavaScript Date
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const day = parseInt(match[5], 10);
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return new Date(year, month, day);
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}
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return null;
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}
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/**
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* Public constructor.
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* @param {Document} doc The document to parse.
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* @param {Object} options The options object.
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*/
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function Readability(doc, options) {
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// In some older versions, people passed a URI as the first argument. Cope:
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if (options && options.documentElement) {
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doc = options;
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options = arguments[2];
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} else if (!doc || !doc.documentElement) {
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throw new Error("First argument to Readability constructor should be a document object.");
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}
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options = options || {};
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this.createImageProxyUrl = options.createImageProxyUrl;
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this._keepTables = !!options.keepTables;
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this._doc = doc;
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this._docJSDOMParser = this._doc.firstChild.__JSDOMParser__;
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this._articleTitle = null;
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this._articleByline = null;
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this._articlePublishedDate = null;
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this._articleDir = null;
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this._languageCode = null;
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this._attempts = [];
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// Configurable options
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this._debug = !!options.debug;
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this._maxElemsToParse = options.maxElemsToParse || this.DEFAULT_MAX_ELEMS_TO_PARSE;
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this._nbTopCandidates = options.nbTopCandidates || this.DEFAULT_N_TOP_CANDIDATES;
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this._charThreshold = options.charThreshold || this.DEFAULT_CHAR_THRESHOLD;
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this._classesToPreserve = this.CLASSES_TO_PRESERVE.concat(options.classesToPreserve || []);
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this._keepClasses = !!options.keepClasses;
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this._serializer = options.serializer || function(el) {
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return el.innerHTML;
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};
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this._disableJSONLD = !!options.disableJSONLD;
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this._baseURI = options.url || this._doc.baseURI;
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this._documentURI = options.url || this._doc.documentURI;
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this._ignoreLinkDensity = options.ignoreLinkDensity || false
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// Start with all flags set
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this._flags = this.FLAG_STRIP_UNLIKELYS |
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this.FLAG_WEIGHT_CLASSES |
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this.FLAG_CLEAN_CONDITIONALLY;
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// Control whether log messages are sent to the console
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if (this._debug) {
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let logNode = function(node) {
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if (node.nodeType === node.TEXT_NODE) {
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return `${node.nodeName} ("${node.textContent}")`;
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}
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let attrPairs = Array.from(node.attributes || [], function(attr) {
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return `${attr.name}="${attr.value}"`;
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}).join(" ");
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return `<${node.localName} ${attrPairs}>`;
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};
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this.log = function () {
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if (typeof console !== "undefined") {
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let args = Array.from(arguments, arg => {
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if (arg && arg.nodeType == this.ELEMENT_NODE) {
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return logNode(arg);
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}
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return arg;
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});
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args.unshift("Reader: (Readability)");
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console.log.apply(console, args);
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} else if (typeof dump !== "undefined") {
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/* global dump */
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var msg = Array.prototype.map.call(arguments, function(x) {
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return (x && x.nodeName) ? logNode(x) : x;
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}).join(" ");
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dump("Reader: (Readability) " + msg + "\n");
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}
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};
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} else {
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this.log = function () {};
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}
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}
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Readability.prototype = {
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FLAG_STRIP_UNLIKELYS: 0x1,
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FLAG_WEIGHT_CLASSES: 0x2,
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FLAG_CLEAN_CONDITIONALLY: 0x4,
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// https://developer.mozilla.org/en-US/docs/Web/API/Node/nodeType
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ELEMENT_NODE: 1,
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TEXT_NODE: 3,
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// Max number of nodes supported by this parser. Default: 0 (no limit)
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DEFAULT_MAX_ELEMS_TO_PARSE: 0,
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// The number of top candidates to consider when analysing how
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// tight the competition is among candidates.
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DEFAULT_N_TOP_CANDIDATES: 5,
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// Element tags to score by default.
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DEFAULT_TAGS_TO_SCORE: "section,h2,h3,h4,h5,h6,p,td,pre".toUpperCase().split(","),
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// The default number of chars an article must have in order to return a result
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DEFAULT_CHAR_THRESHOLD: 500,
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// All of the regular expressions in use within readability.
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// Defined up here so we don't instantiate them repeatedly in loops.
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REGEXPS: {
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lazyLoadingElements: /\S*loading\S*/i,
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// NOTE: These two regular expressions are duplicated in
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// Readability-readerable.js. Please keep both copies in sync.
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articleNegativeLookBehindCandidates: /breadcrumbs|breadcrumb|utils|trilist|_header/i,
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articleNegativeLookAheadCandidates: /outstream(.?)_|sub(.?)_|m_|omeda-promo-|in-article-advert|block-ad-.*|tl_/i,
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unlikelyCandidates: /\bad\b|ai2html|banner|breadcrumbs|breadcrumb|combx|comment|community|cover-wrap|disqus|extra|footer|gdpr|header|legends|menu|related|remark|replies|rss|shoutbox|sidebar|skyscraper|social|sponsor|supplemental|ad-break|agegate|pagination|pager(?!ow)|popup|yom-remote|copyright|keywords|outline|infinite-list|beta|recirculation|site-index|hide-for-print|post-end-share-cta|post-end-cta-full|post-footer|post-head|post-tag|li-date|main-navigation|programtic-ads|outstream_article|hfeed|comment-holder|back-to-top|show-up-next|onward-journey|topic-tracker|list-nav|block-ad-entity|adSpecs|gift-article-button|modal-title|in-story-masthead|share-tools|standard-dock|expanded-dock|margins-h|subscribe-dialog|icon|bumped|dvz-social-media-buttons|post-toc|mobile-menu|mobile-navbar|tl_article_header|mvp(-post)*-(add-story|soc(-mob)*-wrap)|w-condition-invisible|rich-text-block main w-richtext|rich-text-block_ataglance at-a-glance test w-richtext|PostsPage-commentsSection/i,
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// okMaybeItsACandidate: /and|article(?!-breadcrumb)|body|column|content|main|shadow|post-header/i,
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get okMaybeItsACandidate() {
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return new RegExp(`and|(?<!${this.articleNegativeLookAheadCandidates.source})article(?!-(${this.articleNegativeLookBehindCandidates.source}))|body|column|content|^(?!main-navigation|main-header)main|shadow|post-header|hfeed site|blog-posts hfeed|container-banners|menu-opacity|header-with-anchor-widget|commentOnSelection`, 'i')
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},
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positive: /article|body|content|entry|hentry|h-entry|main|page|pagination|post|text|blog|story|tweet(-\w+)?|instagram|image|container-banners|player|commentOnSelection/i,
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negative: /\bad\b|hidden|^hid$| hid$| hid |^hid |banner|combx|comment|com-|contact|footer|gdpr|masthead|media|meta|outbrain|promo|related|scroll|share|shoutbox|sidebar|skyscraper|sponsor|shopping|tags|tool|widget|controls|video-controls/i,
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extraneous: /print|archive|comment|discuss|e[\-]?mail|share|reply|all|login|sign|single|utility/i,
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byline: /byline|author|dateline|writtenby|p-author/i,
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publishedDate: /published|modified|created|updated/i,
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replaceFonts: /<(\/?)font[^>]*>/gi,
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normalize: /\s{2,}/g,
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videos: /\/\/(www\.)?((dailymotion|youtube|youtube-nocookie|player\.vimeo|v\.qq|cdnapisec\.kaltura)\.com|(archive|upload\.wikimedia)\.org|player\.twitch\.tv|piped\.mha\.fi)/i,
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shareElements: /(\b|_)(share|sharedaddy|post-tags)(\b|_)/i,
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nextLink: /(next|weiter|continue|>([^\|]|$)|»([^\|]|$))/i,
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prevLink: /(prev|earl|old|new|<|«)/i,
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tokenize: /\W+/g,
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whitespace: /^\s*$/,
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hasContent: /\S$/,
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hashUrl: /^#.+/,
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srcsetUrl: /(\S+)(\s+[\d.]+[xw])?(\s*(?:,|$))/g,
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b64DataUrl: /^data:\s*([^\s;,]+)\s*;\s*base64\s*,/i,
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// Commas as used in Latin, Sindhi, Chinese and various other scripts.
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// see: https://en.wikipedia.org/wiki/Comma#Comma_variants
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commas: /\u002C|\u060C|\uFE50|\uFE10|\uFE11|\u2E41|\u2E34|\u2E32|\uFF0C/g,
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// See: https://schema.org/Article
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jsonLdArticleTypes: /^Article|AdvertiserContentArticle|NewsArticle|AnalysisNewsArticle|AskPublicNewsArticle|BackgroundNewsArticle|OpinionNewsArticle|ReportageNewsArticle|ReviewNewsArticle|Report|SatiricalArticle|ScholarlyArticle|MedicalScholarlyArticle|SocialMediaPosting|BlogPosting|LiveBlogPosting|DiscussionForumPosting|TechArticle|APIReference$/,
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DATES_REGEXPS: [
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/([0-9]{4}[-\/]?((0[13-9]|1[012])[-\/]?(0[1-9]|[12][0-9]|30)|(0[13578]|1[02])[-\/]?31|02[-\/]?(0[1-9]|1[0-9]|2[0-8]))|([0-9]{2}(([2468][048]|[02468][48])|[13579][26])|([13579][26]|[02468][048]|0[0-9]|1[0-6])00)[-\/]?02[-\/]?29)/i,
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/(((0[13-9]|1[012])[-/]?(0[1-9]|[12][0-9]|30)|(0[13578]|1[02])[-/]?31|02[-/]?(0[1-9]|1[0-9]|2[0-8]))[-/]?[0-9]{4}|02[-/]?29[-/]?([0-9]{2}(([2468][048]|[02468][48])|[13579][26])|([13579][26]|[02468][048]|0[0-9]|1[0-6])00))/i,
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/(((0[1-9]|[12][0-9]|30)[-/]?(0[13-9]|1[012])|31[-/]?(0[13578]|1[02])|(0[1-9]|1[0-9]|2[0-8])[-/]?02)[-/]?[0-9]{4}|29[-/]?02[-/]?([0-9]{2}(([2468][048]|[02468][48])|[13579][26])|([13579][26]|[02468][048]|0[0-9]|1[0-6])00))/i,
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],
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LONG_DATE_REGEXP: /^(Jan(uary)?|Feb(ruary)?|Mar(ch)?|Apr(il)?|May|Jun(e)?|Jul(y)?|Aug(ust)?|Sep(tember)?|Oct(ober)?|Nov(ember)?|Dec(ember)?)\s\d{1,2}(?:st|nd|rd|th)?(,)?\s\d{2,4}$/i,
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CHINESE_DATE_REGEXP: /^\d{2,4}年\d{1,2}月\d{1,2}日$/,
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},
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UNLIKELY_ROLES: ["menu", "menubar", "complementary", "navigation", "alert", "alertdialog", "dialog"],
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DIV_TO_P_ELEMS: new Set(["A", "BLOCKQUOTE", "DL", "DIV", "IMG", "OL", "P", "PRE", "TABLE", "UL", "SELECT"]),
|
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ALTER_TO_DIV_EXCEPTIONS: ["DIV", "ARTICLE", "SECTION", "P"],
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PRESENTATIONAL_ATTRIBUTES: ["align", "background", "bgcolor", "border", "cellpadding", "cellspacing", "frame", "hspace", "rules", "style", "valign", "vspace"],
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DEPRECATED_SIZE_ATTRIBUTE_ELEMS: ["TABLE", "TH", "TD", "HR", "PRE"],
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// The commented out elements qualify as phrasing content but tend to be
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// removed by readability when put into paragraphs, so we ignore them here.
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PHRASING_ELEMS: [
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// "CANVAS", "IFRAME", "SVG", "VIDEO",
|
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"ABBR", "AUDIO", "B", "BDO", "BR", "BUTTON", "CITE", "CODE", "DATA",
|
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"DATALIST", "DFN", "EM", "EMBED", "I", "IMG", "INPUT", "KBD", "LABEL",
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"MARK", "MATH", "METER", "NOSCRIPT", "OBJECT", "OUTPUT", "PROGRESS", "Q",
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"RUBY", "SAMP", "SCRIPT", "SELECT", "SMALL", "SPAN", "STRONG", "SUB",
|
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"SUP", "TEXTAREA", "TIME", "VAR", "WBR"
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],
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|||
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|||
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// These are the classes that readability sets itself.
|
|||
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CLASSES_TO_PRESERVE: [
|
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"page", "twitter-tweet", "tweet-placeholder", "instagram-placeholder", "morning-brew-markets", "prism-code"
|
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],
|
|||
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|||
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// Classes of placeholder elements that can be empty but shouldn't be removed
|
|||
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PLACEHOLDER_CLASSES: ['tweet-placeholder', 'instagram-placeholder'],
|
|||
|
|
|
|||
|
|
// Classes of embeds extracted by the extension
|
|||
|
|
EMBEDS_CLASSES: ['omnivore-instagram-embed'],
|
|||
|
|
|
|||
|
|
// These are the list of HTML entities that need to be escaped.
|
|||
|
|
HTML_ESCAPE_MAP: {
|
|||
|
|
"lt": "<",
|
|||
|
|
"gt": ">",
|
|||
|
|
"amp": "&",
|
|||
|
|
"quot": '"',
|
|||
|
|
"apos": "'",
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
// These are the classes that we skip when cleaning a tag
|
|||
|
|
CLASSES_TO_SKIP: ["post-body", "StoryBodyCompanionColumn"],
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Run any post-process modifications to article content as necessary.
|
|||
|
|
*
|
|||
|
|
* @param Element
|
|||
|
|
* @return void
|
|||
|
|
**/
|
|||
|
|
_postProcessContent: function (articleContent) {
|
|||
|
|
// Readability cannot open relative uris so we convert them to absolute uris.
|
|||
|
|
this._fixRelativeUris(articleContent);
|
|||
|
|
|
|||
|
|
this._createImageProxyLinks(articleContent);
|
|||
|
|
|
|||
|
|
this._simplifyNestedElements(articleContent);
|
|||
|
|
|
|||
|
|
if (!this._keepClasses) {
|
|||
|
|
// Remove classes.
|
|||
|
|
this._cleanClasses(articleContent);
|
|||
|
|
}
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Iterates over a NodeList, calls `filterFn` for each node and removes node
|
|||
|
|
* if function returned `true`.
|
|||
|
|
*
|
|||
|
|
* If function is not passed, removes all the nodes in node list.
|
|||
|
|
*
|
|||
|
|
* @param NodeList nodeList The nodes to operate on
|
|||
|
|
* @param Function filterFn the function to use as a filter
|
|||
|
|
* @return void
|
|||
|
|
*/
|
|||
|
|
_removeNodes: function (nodeList, filterFn) {
|
|||
|
|
// Avoid ever operating on live node lists.
|
|||
|
|
if (this._docJSDOMParser && nodeList._isLiveNodeList) {
|
|||
|
|
throw new Error("Do not pass live node lists to _removeNodes");
|
|||
|
|
}
|
|||
|
|
for (var i = nodeList.length - 1; i >= 0; i--) {
|
|||
|
|
var node = nodeList[i];
|
|||
|
|
var parentNode = node.parentNode;
|
|||
|
|
if (parentNode) {
|
|||
|
|
if (!filterFn || filterFn.call(this, node, i, nodeList)) {
|
|||
|
|
parentNode.removeChild(node);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Iterates over a NodeList, and calls _setNodeTag for each node.
|
|||
|
|
*
|
|||
|
|
* @param NodeList nodeList The nodes to operate on
|
|||
|
|
* @param String newTagName the new tag name to use
|
|||
|
|
* @return void
|
|||
|
|
*/
|
|||
|
|
_replaceNodeTags: function (nodeList, newTagName) {
|
|||
|
|
// Avoid ever operating on live node lists.
|
|||
|
|
if (this._docJSDOMParser && nodeList._isLiveNodeList) {
|
|||
|
|
throw new Error("Do not pass live node lists to _replaceNodeTags");
|
|||
|
|
}
|
|||
|
|
for (const node of nodeList) {
|
|||
|
|
this._setNodeTag(node, newTagName);
|
|||
|
|
}
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Iterate over a NodeList, which doesn't natively fully implement the Array
|
|||
|
|
* interface.
|
|||
|
|
*
|
|||
|
|
* For convenience, the current object context is applied to the provided
|
|||
|
|
* iterate function.
|
|||
|
|
*
|
|||
|
|
* @param NodeList nodeList The NodeList.
|
|||
|
|
* @param Function fn The iterate function.
|
|||
|
|
* @return void
|
|||
|
|
*/
|
|||
|
|
_forEachNode: function (nodeList, fn) {
|
|||
|
|
Array.prototype.forEach.call(nodeList, fn, this);
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Iterate over a NodeList, and return the first node that passes
|
|||
|
|
* the supplied test function
|
|||
|
|
*
|
|||
|
|
* For convenience, the current object context is applied to the provided
|
|||
|
|
* test function.
|
|||
|
|
*
|
|||
|
|
* @param NodeList nodeList The NodeList.
|
|||
|
|
* @param Function fn The test function.
|
|||
|
|
* @return void
|
|||
|
|
*/
|
|||
|
|
_findNode: function (nodeList, fn) {
|
|||
|
|
return Array.prototype.find.call(nodeList, fn, this);
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Iterate over a NodeList, return true if any of the provided iterate
|
|||
|
|
* function calls returns true, false otherwise.
|
|||
|
|
*
|
|||
|
|
* For convenience, the current object context is applied to the
|
|||
|
|
* provided iterate function.
|
|||
|
|
*
|
|||
|
|
* @param NodeList nodeList The NodeList.
|
|||
|
|
* @param Function fn The iterate function.
|
|||
|
|
* @return Boolean
|
|||
|
|
*/
|
|||
|
|
_someNode: function (nodeList, fn) {
|
|||
|
|
return Array.prototype.some.call(nodeList, fn, this);
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Iterate over the attributes of the Element, return true if any of the provided iterate
|
|||
|
|
* function calls returns true, false otherwise.
|
|||
|
|
* @param {Element} node - Node to check for attributes
|
|||
|
|
* @param {function({name: string, value: string})} fn - The iterate function. Accepts object with name and value of the attribute
|
|||
|
|
*/
|
|||
|
|
_someNodeAttribute: function (node, fn) {
|
|||
|
|
return (node.getAttributeNames && node.getAttributeNames() || []).map(name => ({
|
|||
|
|
name,
|
|||
|
|
value: node.getAttribute(name)
|
|||
|
|
})).some(fn)
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Iterate over a NodeList, return true if all of the provided iterate
|
|||
|
|
* function calls return true, false otherwise.
|
|||
|
|
*
|
|||
|
|
* For convenience, the current object context is applied to the
|
|||
|
|
* provided iterate function.
|
|||
|
|
*
|
|||
|
|
* @param NodeList nodeList The NodeList.
|
|||
|
|
* @param Function fn The iterate function.
|
|||
|
|
* @return Boolean
|
|||
|
|
*/
|
|||
|
|
_everyNode: function (nodeList, fn) {
|
|||
|
|
return Array.prototype.every.call(nodeList, fn, this);
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Concat all nodelists passed as arguments.
|
|||
|
|
*
|
|||
|
|
* @return ...NodeList
|
|||
|
|
* @return Array
|
|||
|
|
*/
|
|||
|
|
_concatNodeLists: function () {
|
|||
|
|
var slice = Array.prototype.slice;
|
|||
|
|
var args = slice.call(arguments);
|
|||
|
|
var nodeLists = args.map(function (list) {
|
|||
|
|
return slice.call(list);
|
|||
|
|
});
|
|||
|
|
return Array.prototype.concat.apply([], nodeLists);
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
_getAllNodesWithTag: function (node, tagNames) {
|
|||
|
|
if (node.querySelectorAll) {
|
|||
|
|
return node.querySelectorAll(tagNames.join(","));
|
|||
|
|
}
|
|||
|
|
return [].concat.apply([], tagNames.map(function (tag) {
|
|||
|
|
var collection = node.getElementsByTagName(tag);
|
|||
|
|
return Array.isArray(collection) ? collection : Array.from(collection);
|
|||
|
|
}));
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Removes the class="" attribute from every element in the given
|
|||
|
|
* subtree, except those that match CLASSES_TO_PRESERVE and
|
|||
|
|
* the classesToPreserve array from the options object.
|
|||
|
|
*
|
|||
|
|
* @param Element
|
|||
|
|
* @return void
|
|||
|
|
*/
|
|||
|
|
_cleanClasses: function (node) {
|
|||
|
|
if (node.className && node.className.startsWith && node.className.startsWith('_omnivore')) {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (node.className && node.className.hasOwnProperty && node.className.hasOwnProperty('_omnivore')) {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (this.EMBEDS_CLASSES.includes(node.className) || this.hasEmbed(node)) {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var classesToPreserve = this._classesToPreserve;
|
|||
|
|
var className = (node.getAttribute("class") || "")
|
|||
|
|
.split(/\s+/)
|
|||
|
|
.filter(function (cls) {
|
|||
|
|
return classesToPreserve.indexOf(cls) !== -1;
|
|||
|
|
})
|
|||
|
|
.join(" ");
|
|||
|
|
|
|||
|
|
if (className) {
|
|||
|
|
node.setAttribute("class", className);
|
|||
|
|
} else {
|
|||
|
|
node.removeAttribute("class");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
for (node = node.firstElementChild; node; node = node.nextElementSibling) {
|
|||
|
|
this._cleanClasses(node);
|
|||
|
|
}
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
toAbsoluteURI: function (uri) {
|
|||
|
|
var baseURI = this._baseURI;
|
|||
|
|
var documentURI = this._documentURI;
|
|||
|
|
|
|||
|
|
// Leave hash links alone if the base URI matches the document URI:
|
|||
|
|
if (baseURI === documentURI && uri.charAt(0) === "#") {
|
|||
|
|
return uri;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Otherwise, resolve against base URI:
|
|||
|
|
try {
|
|||
|
|
return new URL(uri, baseURI).href;
|
|||
|
|
} catch (ex) {
|
|||
|
|
// Something went wrong, just return the original:
|
|||
|
|
}
|
|||
|
|
return uri;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Converts each <a> and <img> uri in the given element to an absolute URI,
|
|||
|
|
* ignoring #ref URIs.
|
|||
|
|
*
|
|||
|
|
* @param Element
|
|||
|
|
* @return void
|
|||
|
|
*/
|
|||
|
|
_fixRelativeUris: function (articleContent) {
|
|||
|
|
var links = this._getAllNodesWithTag(articleContent, ["a"]);
|
|||
|
|
this._forEachNode(links, function (link) {
|
|||
|
|
var href = link.getAttribute("href");
|
|||
|
|
if (href) {
|
|||
|
|
// Remove links with javascript: URIs, since
|
|||
|
|
// they won't work after scripts have been removed from the page.
|
|||
|
|
if (href.indexOf("javascript:") === 0) {
|
|||
|
|
// if the link only contains simple text content, it can be converted to a text node
|
|||
|
|
if (link.childNodes.length === 1 && link.childNodes[0].nodeType === this.TEXT_NODE) {
|
|||
|
|
var text = this._doc.createTextNode(link.textContent);
|
|||
|
|
link.parentNode.replaceChild(text, link);
|
|||
|
|
} else {
|
|||
|
|
// if the link has multiple children, they should all be preserved
|
|||
|
|
var container = this._doc.createElement("span");
|
|||
|
|
while (link.firstChild) {
|
|||
|
|
container.appendChild(link.firstChild);
|
|||
|
|
}
|
|||
|
|
link.parentNode.replaceChild(container, link);
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
link.setAttribute("href", this.toAbsoluteURI(href));
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
var medias = this._getAllNodesWithTag(articleContent, [
|
|||
|
|
"img", "picture", "figure", "video", "audio", "source"
|
|||
|
|
]);
|
|||
|
|
|
|||
|
|
this._forEachNode(medias, function (media) {
|
|||
|
|
var src = media.getAttribute("src");
|
|||
|
|
var poster = media.getAttribute("poster");
|
|||
|
|
var srcset = media.getAttribute("srcset");
|
|||
|
|
|
|||
|
|
if (src) {
|
|||
|
|
media.setAttribute("src", this.toAbsoluteURI(src));
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (poster) {
|
|||
|
|
media.setAttribute("poster", this.toAbsoluteURI(poster));
|
|||
|
|
}
|
|||
|
|
});
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/** Creates imageproxy links for all article images with href source */
|
|||
|
|
_createImageProxyLinks: function (articleContent) {
|
|||
|
|
if (this.createImageProxyUrl !== undefined) {
|
|||
|
|
const dataUriRegex = /^data:image\/(?:png|jpe?g|gif);base64,/;
|
|||
|
|
|
|||
|
|
// replace all images' href source
|
|||
|
|
const images = articleContent.getElementsByTagName('img');
|
|||
|
|
Array.from(images).forEach(image => {
|
|||
|
|
// use data-src if lazy loading
|
|||
|
|
const src = image.getAttribute("data-src") || image.getAttribute("src");
|
|||
|
|
|
|||
|
|
// do not proxy data uri
|
|||
|
|
if (src && !dataUriRegex.test(src)) {
|
|||
|
|
const absoluteSrc = this.toAbsoluteURI(src);
|
|||
|
|
const attToNumber = (str) => {
|
|||
|
|
if (!str) { return 0; }
|
|||
|
|
const res = parseInt(str);
|
|||
|
|
if (isNaN(res)) { return 0; }
|
|||
|
|
if (String(res) !== str) { return 0; }
|
|||
|
|
return res
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
const width = attToNumber(image.getAttribute('width') || image.style.width);
|
|||
|
|
const height = attToNumber(image.getAttribute('height') || image.style.height);
|
|||
|
|
|
|||
|
|
const proxySrc = this.createImageProxyUrl(absoluteSrc, width, height);
|
|||
|
|
image.setAttribute('src', proxySrc);
|
|||
|
|
image.setAttribute('data-omnivore-original-src', absoluteSrc)
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// remove crossorigin attribute to avoid CORS errors
|
|||
|
|
image.removeAttribute('crossorigin');
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
// replace all srcset's
|
|||
|
|
const elements = articleContent.querySelectorAll('[srcset]');
|
|||
|
|
Array.from(elements).forEach(element => {
|
|||
|
|
let resultSrcset = '';
|
|||
|
|
const srcSet = element.getAttribute('srcset')
|
|||
|
|
|
|||
|
|
// If the srcset is a data image its probably just for lazy loading
|
|||
|
|
// so we want to remove it.
|
|||
|
|
if (dataUriRegex.test(srcSet) && element.getAttribute('src')) {
|
|||
|
|
element.removeAttribute('srcset');
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
const items = parseSrcset(srcSet);
|
|||
|
|
for (let item of items) {
|
|||
|
|
const { url: link, w, x, d } = item;
|
|||
|
|
if (!w && !x && !d) {
|
|||
|
|
const proxySrc = this.createImageProxyUrl(this.toAbsoluteURI(link));
|
|||
|
|
resultSrcset += `${proxySrc},`;
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// handle cases where width is described by value (e.g. 1080w)
|
|||
|
|
if (w) {
|
|||
|
|
const value = String(w);
|
|||
|
|
const proxySrc = this.createImageProxyUrl(this.toAbsoluteURI(link), +value);
|
|||
|
|
resultSrcset += `${proxySrc} ${w}w,`;
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// handle cases where width is described by multiplier (e.g. 2x)
|
|||
|
|
if (x) {
|
|||
|
|
const proxySrc = this.createImageProxyUrl(this.toAbsoluteURI(link));
|
|||
|
|
resultSrcset += `${proxySrc} ${x}x,`;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (d) {
|
|||
|
|
const proxySrc = this.createImageProxyUrl(this.toAbsoluteURI(link));
|
|||
|
|
resultSrcset += `${proxySrc} ${d}x,`;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
element.setAttribute('srcset', resultSrcset);
|
|||
|
|
});
|
|||
|
|
}
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
_simplifyNestedElements: function (articleContent) {
|
|||
|
|
var node = articleContent;
|
|||
|
|
|
|||
|
|
while (node) {
|
|||
|
|
if (this.PLACEHOLDER_CLASSES.includes(node.className) || this.hasEmbed(node) || this.isEmbed(node)) {
|
|||
|
|
node = this._getNextNode(node);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// If we have a node with only one child element which has the placeholder class, keep it
|
|||
|
|
if (this._hasSingleTagInsideElement(node, "DIV") && this.PLACEHOLDER_CLASSES.includes(node.firstElementChild.className)) {
|
|||
|
|
node = this._getNextNode(node);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (node.parentNode && ["DIV", "SECTION"].includes(node.tagName) && !this._isOmnivoreNode(node) && !(node.id && node.id.startsWith("readability"))) {
|
|||
|
|
if (this._isElementWithoutContent(node)) {
|
|||
|
|
node = this._removeAndGetNext(node);
|
|||
|
|
continue;
|
|||
|
|
} else if (this._hasSingleTagInsideElement(node, "DIV") || this._hasSingleTagInsideElement(node, "SECTION")) {
|
|||
|
|
var child = node.children[0];
|
|||
|
|
for (var i = 0; i < node.attributes.length; i++) {
|
|||
|
|
child.setAttribute(node.attributes[i].name, node.attributes[i].value);
|
|||
|
|
}
|
|||
|
|
node.parentNode.replaceChild(child, node);
|
|||
|
|
node = child;
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
node = this._getNextNode(node);
|
|||
|
|
}
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Get the article title as an H1.
|
|||
|
|
*
|
|||
|
|
* @return string
|
|||
|
|
**/
|
|||
|
|
_getArticleTitle: function () {
|
|||
|
|
var doc = this._doc;
|
|||
|
|
var curTitle = "";
|
|||
|
|
var origTitle = "";
|
|||
|
|
|
|||
|
|
try {
|
|||
|
|
curTitle = origTitle = doc.title.trim();
|
|||
|
|
|
|||
|
|
// If they had an element with id "title" in their HTML
|
|||
|
|
if (typeof curTitle !== "string")
|
|||
|
|
curTitle = origTitle = this._getInnerText(doc.getElementsByTagName("title")[0]);
|
|||
|
|
} catch (e) {/* ignore exceptions setting the title. */
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var titleHadHierarchicalSeparators = false;
|
|||
|
|
|
|||
|
|
function wordCount(str) {
|
|||
|
|
return str.split(/\s+/).length;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// If there's a separator in the title, first remove the final part
|
|||
|
|
if ((/ [\|\-\\\/>»] /).test(curTitle)) {
|
|||
|
|
titleHadHierarchicalSeparators = / [\\\/>»] /.test(curTitle);
|
|||
|
|
curTitle = origTitle.replace(/(.*)[\|\-\\\/>»] .*/gi, "$1");
|
|||
|
|
|
|||
|
|
// If the resulting title is too short (3 words or fewer), remove
|
|||
|
|
// the first part instead:
|
|||
|
|
if (wordCount(curTitle) < 3)
|
|||
|
|
curTitle = origTitle.replace(/[^\|\-\\\/>»]*[\|\-\\\/>»](.*)/gi, "$1");
|
|||
|
|
} else if (curTitle.indexOf(": ") !== -1) {
|
|||
|
|
// Check if we have an heading containing this exact string, so we
|
|||
|
|
// could assume it's the full title.
|
|||
|
|
var headings = this._concatNodeLists(
|
|||
|
|
doc.getElementsByTagName("h1"),
|
|||
|
|
doc.getElementsByTagName("h2")
|
|||
|
|
);
|
|||
|
|
var trimmedTitle = curTitle.trim();
|
|||
|
|
var match = this._someNode(headings, function (heading) {
|
|||
|
|
return heading.textContent.trim() === trimmedTitle;
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
// If we don't, let's extract the title out of the original title string.
|
|||
|
|
if (!match) {
|
|||
|
|
curTitle = origTitle.substring(origTitle.lastIndexOf(":") + 1);
|
|||
|
|
|
|||
|
|
// If the title is now too short, try the first colon instead:
|
|||
|
|
if (wordCount(curTitle) < 3) {
|
|||
|
|
curTitle = origTitle.substring(origTitle.indexOf(":") + 1);
|
|||
|
|
// But if we have too many words before the colon there's something weird
|
|||
|
|
// with the titles and the H tags so let's just use the original title instead
|
|||
|
|
} else if (wordCount(origTitle.substr(0, origTitle.indexOf(":"))) > 5) {
|
|||
|
|
curTitle = origTitle;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
} else if (curTitle.length > 150 || curTitle.length < 15) {
|
|||
|
|
var hOnes = doc.getElementsByTagName("h1");
|
|||
|
|
|
|||
|
|
if (hOnes.length === 1)
|
|||
|
|
curTitle = this._getInnerText(hOnes[0]);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
curTitle = curTitle.trim().replace(this.REGEXPS.normalize, " ");
|
|||
|
|
// If we now have 4 words or fewer as our title, and either no
|
|||
|
|
// 'hierarchical' separators (\, /, > or ») were found in the original
|
|||
|
|
// title or we decreased the number of words by more than 1 word, use
|
|||
|
|
// the original title.
|
|||
|
|
var curTitleWordCount = wordCount(curTitle);
|
|||
|
|
if (curTitleWordCount <= 4 &&
|
|||
|
|
(!titleHadHierarchicalSeparators ||
|
|||
|
|
curTitleWordCount != wordCount(origTitle.replace(/[\|\-\\\/>»]+/g, "")) - 1)) {
|
|||
|
|
curTitle = origTitle;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return curTitle;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Prepare the HTML document for readability to scrape it.
|
|||
|
|
* This includes things like stripping javascript, CSS, and handling terrible markup.
|
|||
|
|
*
|
|||
|
|
* @return void
|
|||
|
|
**/
|
|||
|
|
_prepDocument: function () {
|
|||
|
|
var doc = this._doc;
|
|||
|
|
|
|||
|
|
// Remove all style tags in head
|
|||
|
|
this._removeNodes(this._getAllNodesWithTag(doc, ["style"]));
|
|||
|
|
|
|||
|
|
if (doc.body) {
|
|||
|
|
this._replaceBrs(doc.body);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
this._replaceNodeTags(this._getAllNodesWithTag(doc, ["font"]), "SPAN");
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Finds the next node, starting from the given node, and ignoring
|
|||
|
|
* whitespace in between. If the given node is an element, the same node is
|
|||
|
|
* returned.
|
|||
|
|
*/
|
|||
|
|
_nextNode: function (node) {
|
|||
|
|
var next = node;
|
|||
|
|
while (next
|
|||
|
|
&& (next.nodeType !== this.ELEMENT_NODE)
|
|||
|
|
&& this.REGEXPS.whitespace.test(next.textContent)) {
|
|||
|
|
next = next.nextSibling;
|
|||
|
|
}
|
|||
|
|
return next;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Replaces 2 or more successive <br> elements with a single <p>.
|
|||
|
|
* Whitespace between <br> elements are ignored. For example:
|
|||
|
|
* <div>foo<br>bar<br> <br><br>abc</div>
|
|||
|
|
* will become:
|
|||
|
|
* <div>foo<br>bar<p>abc</p></div>
|
|||
|
|
*/
|
|||
|
|
_replaceBrs: function (elem) {
|
|||
|
|
this._forEachNode(this._getAllNodesWithTag(elem, ["br"]), function (br) {
|
|||
|
|
var next = br.nextSibling;
|
|||
|
|
|
|||
|
|
// Whether 2 or more <br> elements have been found and replaced with a
|
|||
|
|
// <p> block.
|
|||
|
|
var replaced = false;
|
|||
|
|
|
|||
|
|
// If we find a <br> chain, remove the <br>s until we hit another node
|
|||
|
|
// or non-whitespace. This leaves behind the first <br> in the chain
|
|||
|
|
// (which will be replaced with a <p> later).
|
|||
|
|
while ((next = this._nextNode(next)) && (next.tagName === "BR")) {
|
|||
|
|
replaced = true;
|
|||
|
|
var brSibling = next.nextSibling;
|
|||
|
|
next.parentNode.removeChild(next);
|
|||
|
|
next = brSibling;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// If we removed a <br> chain, replace the remaining <br> with a <p>. Add
|
|||
|
|
// all sibling nodes as children of the <p> until we hit another <br>
|
|||
|
|
// chain.
|
|||
|
|
if (replaced) {
|
|||
|
|
var p = this._doc.createElement("p");
|
|||
|
|
br.parentNode.replaceChild(p, br);
|
|||
|
|
|
|||
|
|
next = p.nextSibling;
|
|||
|
|
while (next) {
|
|||
|
|
// If we've hit another <br><br>, we're done adding children to this <p>.
|
|||
|
|
if (next.tagName == "BR") {
|
|||
|
|
var nextElem = this._nextNode(next.nextSibling);
|
|||
|
|
if (nextElem && nextElem.tagName == "BR")
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (!this._isPhrasingContent(next))
|
|||
|
|
break;
|
|||
|
|
|
|||
|
|
// Otherwise, make this node a child of the new <p>.
|
|||
|
|
var sibling = next.nextSibling;
|
|||
|
|
p.appendChild(next);
|
|||
|
|
next = sibling;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
while (p.lastChild && this._isWhitespace(p.lastChild)) {
|
|||
|
|
p.removeChild(p.lastChild);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (p.parentNode.tagName === "P")
|
|||
|
|
this._setNodeTag(p.parentNode, "DIV");
|
|||
|
|
}
|
|||
|
|
});
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
_setNodeTag: function (node, tag) {
|
|||
|
|
this.log("_setNodeTag", node, tag);
|
|||
|
|
if (this._docJSDOMParser) {
|
|||
|
|
node.localName = tag.toLowerCase();
|
|||
|
|
node.tagName = tag.toUpperCase();
|
|||
|
|
return node;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var replacement = node.ownerDocument.createElement(tag);
|
|||
|
|
while (node.firstChild) {
|
|||
|
|
replacement.appendChild(node.firstChild);
|
|||
|
|
}
|
|||
|
|
node.parentNode.replaceChild(replacement, node);
|
|||
|
|
if (node.readability)
|
|||
|
|
replacement.readability = node.readability;
|
|||
|
|
|
|||
|
|
for (var i = 0; i < node.attributes.length; i++) {
|
|||
|
|
try {
|
|||
|
|
replacement.setAttribute(node.attributes[i].name, node.attributes[i].value);
|
|||
|
|
} catch (ex) {
|
|||
|
|
/* it's possible for setAttribute() to throw if the attribute name
|
|||
|
|
* isn't a valid XML Name. Such attributes can however be parsed from
|
|||
|
|
* source in HTML docs, see https://github.com/whatwg/html/issues/4275,
|
|||
|
|
* so we can hit them here and then throw. We don't care about such
|
|||
|
|
* attributes so we ignore them.
|
|||
|
|
*/
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return replacement;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Prepare the article node for display. Clean out any inline styles,
|
|||
|
|
* iframes, forms, strip extraneous <p> tags, etc.
|
|||
|
|
*
|
|||
|
|
* @param Element
|
|||
|
|
* @return void
|
|||
|
|
**/
|
|||
|
|
_prepArticle: async function (articleContent) {
|
|||
|
|
if (this._keepTables) {
|
|||
|
|
// replace tables which is not a preserve class with divs for newsletters
|
|||
|
|
this._replaceNodeTags(this._getAllNodesWithTag(articleContent, ["table"]).filter(t => !this._classesToPreserve.includes(t.className)), "div");
|
|||
|
|
}
|
|||
|
|
await this._createPlaceholders(articleContent);
|
|||
|
|
this._cleanStyles(articleContent);
|
|||
|
|
// Check for data tables before we continue, to avoid removing items in
|
|||
|
|
// those tables, which will often be isolated even though they're
|
|||
|
|
// visually linked to other content-ful elements (text, images, etc.).
|
|||
|
|
this._markDataTables(articleContent);
|
|||
|
|
|
|||
|
|
this._fixLazyImages(articleContent);
|
|||
|
|
|
|||
|
|
// Clean out junk from the article content
|
|||
|
|
this._cleanConditionally(articleContent, "form");
|
|||
|
|
this._cleanConditionally(articleContent, "fieldset");
|
|||
|
|
this._clean(articleContent, "object");
|
|||
|
|
this._clean(articleContent, "embed");
|
|||
|
|
this._clean(articleContent, "footer");
|
|||
|
|
this._clean(articleContent, "link");
|
|||
|
|
this._clean(articleContent, "aside");
|
|||
|
|
|
|||
|
|
// Clean out elements with little content that have "share" in their id/class combinations from final top candidates,
|
|||
|
|
// which means we don't remove the top candidates even they have "share".
|
|||
|
|
|
|||
|
|
var shareElementThreshold = this.DEFAULT_CHAR_THRESHOLD;
|
|||
|
|
|
|||
|
|
this._forEachNode(articleContent.children, function (topCandidate) {
|
|||
|
|
this._cleanMatchedNodes(topCandidate, function (node, matchString) {
|
|||
|
|
if (this.REGEXPS.shareElements.test(matchString) && node.textContent.length < shareElementThreshold) {
|
|||
|
|
// Prevent removing images that have width more than 100 pixels
|
|||
|
|
// Example article - https://www.dailymail.co.uk/news/article-8868177/Pregnant-Katharine-McPhee-David-Foster-house-hunting-Harry-Meghans-Montecito-enclave.html
|
|||
|
|
// dailymail are using 'share' as a part of a class name of every image
|
|||
|
|
return !(node.tagName === 'IMG' && parseInt(node.getAttribute('width')) > 100);
|
|||
|
|
}
|
|||
|
|
});
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
this._clean(articleContent, "iframe");
|
|||
|
|
this._clean(articleContent, "input");
|
|||
|
|
this._clean(articleContent, "textarea");
|
|||
|
|
this._clean(articleContent, "select");
|
|||
|
|
this._cleanConditionally(articleContent, "button");
|
|||
|
|
this._cleanHeaders(articleContent);
|
|||
|
|
|
|||
|
|
// Do these last as the previous stuff may have removed junk
|
|||
|
|
// that will affect these
|
|||
|
|
this._cleanConditionally(articleContent, "table");
|
|||
|
|
this._cleanConditionally(articleContent, "ul");
|
|||
|
|
this._cleanConditionally(articleContent, "div");
|
|||
|
|
|
|||
|
|
// replace H1 with H2 as H1 should be only title that is displayed separately
|
|||
|
|
this._replaceNodeTags(this._getAllNodesWithTag(articleContent, ["h1"]), "h2");
|
|||
|
|
|
|||
|
|
// Remove extra paragraphs
|
|||
|
|
this._removeNodes(this._getAllNodesWithTag(articleContent, ["p"]), function (paragraph) {
|
|||
|
|
var imgCount = paragraph.getElementsByTagName("img").length;
|
|||
|
|
var embedCount = paragraph.getElementsByTagName("embed").length;
|
|||
|
|
var objectCount = paragraph.getElementsByTagName("object").length;
|
|||
|
|
// At this point, nasty iframes have been removed, only remain embedded video ones.
|
|||
|
|
var iframeCount = paragraph.getElementsByTagName("iframe").length;
|
|||
|
|
var totalCount = imgCount + embedCount + objectCount + iframeCount;
|
|||
|
|
|
|||
|
|
// some websites might contain javascript carousels that are parsed like img + number of items in the carousel
|
|||
|
|
// example - https://www.dailymail.co.uk/news/article-8868177/Pregnant-Katharine-McPhee-David-Foster-house-hunting-Harry-Meghans-Montecito-enclave.html
|
|||
|
|
const hasRedundantImage = imgCount === 1 && /^\+\d+$/g.test(this._getInnerText(paragraph));
|
|||
|
|
|
|||
|
|
return (totalCount === 0 &&
|
|||
|
|
!this._getInnerText(paragraph, false) &&
|
|||
|
|
!this.PLACEHOLDER_CLASSES.includes(paragraph.className)) || hasRedundantImage;
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
this._forEachNode(this._getAllNodesWithTag(articleContent, ["br"]), function (br) {
|
|||
|
|
var next = this._nextNode(br.nextSibling);
|
|||
|
|
if (next && next.tagName == "P")
|
|||
|
|
br.parentNode.removeChild(br);
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
// Remove single-cell tables
|
|||
|
|
this._forEachNode(this._getAllNodesWithTag(articleContent, ["table"]), function (table) {
|
|||
|
|
var tbody = this._hasSingleTagInsideElement(table, "TBODY") ? table.firstElementChild : table;
|
|||
|
|
if (this._hasSingleTagInsideElement(tbody, "TR")) {
|
|||
|
|
var row = tbody.firstElementChild;
|
|||
|
|
if (this._hasSingleTagInsideElement(row, "TD")) {
|
|||
|
|
var cell = row.firstElementChild;
|
|||
|
|
cell = this._setNodeTag(cell, this._everyNode(cell.childNodes, this._isPhrasingContent) ? "P" : "DIV");
|
|||
|
|
table.parentNode.replaceChild(cell, table);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
// Final clean up of nodes that might pass readability conditions but still contain redundant text
|
|||
|
|
// For example, this article (https://www.sciencedirect.com/science/article/abs/pii/S0047248498902196)
|
|||
|
|
// has a "View full text" anchor at the bottom of the page
|
|||
|
|
this._removeNodes(this._getAllNodesWithTag(articleContent, ["a"]), function (anchor) {
|
|||
|
|
const possibleRedundantText = /view full|skip to content|Open in browser/ig;
|
|||
|
|
const innerText = this._getInnerText(anchor);
|
|||
|
|
// also removes anchors class names that contain 'tw-text-substack-secondary' as they are used for Substack subscription
|
|||
|
|
const possibleRedundantClassName = 'tw-text-substack-secondary'
|
|||
|
|
const className = anchor.className;
|
|||
|
|
return (possibleRedundantText.test(innerText) && innerText.length <= 30) || className.includes(possibleRedundantClassName);
|
|||
|
|
});
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Initialize a node with the readability object. Also checks the
|
|||
|
|
* className/id for special names to add to its score.
|
|||
|
|
*
|
|||
|
|
* @param Element
|
|||
|
|
* @return void
|
|||
|
|
**/
|
|||
|
|
_initializeNode: function (node) {
|
|||
|
|
node.readability = {"contentScore": 0};
|
|||
|
|
|
|||
|
|
switch (node.tagName) {
|
|||
|
|
case "DIV":
|
|||
|
|
node.readability.contentScore += 5;
|
|||
|
|
break;
|
|||
|
|
|
|||
|
|
case "PRE":
|
|||
|
|
case "TD":
|
|||
|
|
case "BLOCKQUOTE":
|
|||
|
|
node.readability.contentScore += 3;
|
|||
|
|
break;
|
|||
|
|
|
|||
|
|
case "ADDRESS":
|
|||
|
|
case "OL":
|
|||
|
|
case "UL":
|
|||
|
|
case "DL":
|
|||
|
|
case "DD":
|
|||
|
|
case "DT":
|
|||
|
|
case "LI":
|
|||
|
|
case "FORM":
|
|||
|
|
node.readability.contentScore -= 3;
|
|||
|
|
break;
|
|||
|
|
|
|||
|
|
case "H1":
|
|||
|
|
case "H2":
|
|||
|
|
case "H3":
|
|||
|
|
case "H4":
|
|||
|
|
case "H5":
|
|||
|
|
case "H6":
|
|||
|
|
case "TH":
|
|||
|
|
node.readability.contentScore -= 5;
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
node.readability.contentScore += this._getClassWeight(node);
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
_removeAndGetNext: function (node) {
|
|||
|
|
var nextNode = this._getNextNode(node, true);
|
|||
|
|
node.parentNode.removeChild(node);
|
|||
|
|
return nextNode;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Traverse the DOM from node to node, starting at the node passed in.
|
|||
|
|
* Pass true for the second parameter to indicate this node itself
|
|||
|
|
* (and its kids) are going away, and we want the next node over.
|
|||
|
|
*
|
|||
|
|
* Calling this in a loop will traverse the DOM depth-first.
|
|||
|
|
*/
|
|||
|
|
_getNextNode: function (node, ignoreSelfAndKids) {
|
|||
|
|
// First check for kids if those aren't being ignored
|
|||
|
|
if (!ignoreSelfAndKids && node.firstElementChild) {
|
|||
|
|
return node.firstElementChild;
|
|||
|
|
}
|
|||
|
|
// Then for siblings...
|
|||
|
|
if (node.nextElementSibling) {
|
|||
|
|
return node.nextElementSibling;
|
|||
|
|
}
|
|||
|
|
// And finally, move up the parent chain *and* find a sibling
|
|||
|
|
// (because this is depth-first traversal, we will have already
|
|||
|
|
// seen the parent nodes themselves).
|
|||
|
|
do {
|
|||
|
|
node = node.parentNode;
|
|||
|
|
} while (node && !node.nextElementSibling);
|
|||
|
|
return node && node.nextElementSibling;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
// compares second text to first one
|
|||
|
|
// 1 = same text, 0 = completely different text
|
|||
|
|
// works the way that it splits both texts into words and then finds words that are unique in second text
|
|||
|
|
// the result is given by the lower length of unique parts
|
|||
|
|
_textSimilarity: function (textA, textB) {
|
|||
|
|
const DISTANCE_WEIGHT = 0.618;
|
|||
|
|
const tokensA = textA.toLowerCase().split(this.REGEXPS.tokenize).filter(Boolean);
|
|||
|
|
const tokensB = textB.toLowerCase().split(this.REGEXPS.tokenize).filter(Boolean);
|
|||
|
|
if (!tokensA.length || !tokensB.length) {
|
|||
|
|
return 0;
|
|||
|
|
}
|
|||
|
|
const {uniqTokensB, similarTokensB} = tokensB.reduce((res, token) => {
|
|||
|
|
if (tokensA.includes(token)) {
|
|||
|
|
res.similarTokensB.push(token);
|
|||
|
|
} else {
|
|||
|
|
res.uniqTokensB.push(token);
|
|||
|
|
}
|
|||
|
|
return res;
|
|||
|
|
}, {similarTokensB: [], uniqTokensB: []});
|
|||
|
|
const distanceB = uniqTokensB.join(" ").length / tokensB.join(" ").length;
|
|||
|
|
const lengthDistance = similarTokensB.join(" ").length / tokensA.join(" ").length;
|
|||
|
|
return DISTANCE_WEIGHT * (1 - distanceB) + lengthDistance * (1 - DISTANCE_WEIGHT);
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
_checkPublishedDate: function (node, matchString) {
|
|||
|
|
// Skipping meta tags
|
|||
|
|
if (node.tagName.toLowerCase() === 'meta') return
|
|||
|
|
// return published date if the class name is 'omnivore-published-date' which we added when we scraped the article
|
|||
|
|
if (node.className === 'omnivore-published-date' && this._isValidPublishedDate(node.textContent)) {
|
|||
|
|
return new Date(node.textContent);
|
|||
|
|
}
|
|||
|
|
// we don't want to check for dates in the URL's
|
|||
|
|
if (node.tagName.toLowerCase() === 'a') return
|
|||
|
|
// get the datetime from time element
|
|||
|
|
if (node.tagName.toLowerCase() === 'time') {
|
|||
|
|
const datetime = node.getAttribute('datetime')
|
|||
|
|
if (datetime) {
|
|||
|
|
const date = new Date(datetime)
|
|||
|
|
if (!isNaN(date)) {
|
|||
|
|
this._articlePublishedDate = date
|
|||
|
|
return true
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Searching for the real date in the text content
|
|||
|
|
const content = node.textContent.trim()
|
|||
|
|
let dateFound
|
|||
|
|
const dateRegExpFound = this.REGEXPS.DATES_REGEXPS.find(regexp => regexp.test(content))
|
|||
|
|
if (dateRegExpFound) {
|
|||
|
|
dateFound = dateRegExpFound.exec(content)[0]
|
|||
|
|
} else if (this.REGEXPS.LONG_DATE_REGEXP.test(content)) {
|
|||
|
|
dateFound = this.REGEXPS.LONG_DATE_REGEXP.exec(content)[0].replace(/st|nd|rd|th/i, '')
|
|||
|
|
} else if (this.REGEXPS.CHINESE_DATE_REGEXP.test(content)) {
|
|||
|
|
dateFound = this.REGEXPS.CHINESE_DATE_REGEXP.exec(content)[0].replace(/年|月/g, '-').replace(/日/g, '')
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
let publishedDateParsed
|
|||
|
|
try {
|
|||
|
|
// Trying to parse the Date from the content itself
|
|||
|
|
publishedDateParsed = new Date(content)
|
|||
|
|
} catch (error) { }
|
|||
|
|
|
|||
|
|
if (
|
|||
|
|
// Checking for the dates keywords through the attributes except URL's
|
|||
|
|
((this._someNodeAttribute(node, ({ value, name }) => {
|
|||
|
|
if (/href|uri|url/i.test(name)) return false;
|
|||
|
|
return this.REGEXPS.publishedDate.test(value)
|
|||
|
|
}) || dateFound) || (/date/i.test(matchString) && !isNaN(publishedDateParsed)))
|
|||
|
|
&& this._isValidPublishedDate(node.textContent)
|
|||
|
|
) {
|
|||
|
|
try {
|
|||
|
|
if (isNaN(publishedDateParsed)) {
|
|||
|
|
// Trying to parse the Date from the found by REGEXP string
|
|||
|
|
publishedDateParsed = new Date(dateFound)
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (!isNaN(publishedDateParsed) && !this._articlePublishedDate)
|
|||
|
|
this._articlePublishedDate = publishedDateParsed
|
|||
|
|
}
|
|||
|
|
catch (error) { }
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
return false;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
_checkByline: function(node, matchString) {
|
|||
|
|
if (this._articleByline) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (node.getAttribute !== undefined) {
|
|||
|
|
var rel = node.getAttribute("rel");
|
|||
|
|
var itemprop = node.getAttribute("itemprop");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if ((rel === "author" || itemprop && itemprop.indexOf("author") !== -1) || this.REGEXPS.byline.test(matchString)) {
|
|||
|
|
var allText = node.textContent.trim()
|
|||
|
|
var nameText = node.querySelector('span[itemprop="name"]')?.textContent
|
|||
|
|
const bylineText = nameText ?? allText
|
|||
|
|
if (this._isValidByline(bylineText)) {
|
|||
|
|
this._articleByline = bylineText
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return false;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
_getNodeAncestors: function (node, maxDepth) {
|
|||
|
|
maxDepth = maxDepth || 0;
|
|||
|
|
var i = 0, ancestors = [];
|
|||
|
|
while (node.parentNode) {
|
|||
|
|
ancestors.push(node.parentNode);
|
|||
|
|
if (maxDepth && ++i === maxDepth)
|
|||
|
|
break;
|
|||
|
|
node = node.parentNode;
|
|||
|
|
}
|
|||
|
|
return ancestors;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/***
|
|||
|
|
* grabArticle - Using a variety of metrics (content score, classname, element types), find the content that is
|
|||
|
|
* most likely to be the stuff a user wants to read. Then return it wrapped up in a div.
|
|||
|
|
*
|
|||
|
|
* @param page a document to run upon. Needs to be a full document, complete with body.
|
|||
|
|
* @return Element
|
|||
|
|
**/
|
|||
|
|
_grabArticle: async function(page) {
|
|||
|
|
this.log("**** grabArticle ****");
|
|||
|
|
const doc = this._doc;
|
|||
|
|
const isPaging = page !== null;
|
|||
|
|
page = page ? page : this._doc.body;
|
|||
|
|
|
|||
|
|
// We can't grab an article if we don't have a page!
|
|||
|
|
if (!page) {
|
|||
|
|
this.log("No body found in document. Abort.");
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var pageCacheHtml = page.innerHTML;
|
|||
|
|
|
|||
|
|
while (true) {
|
|||
|
|
var stripUnlikelyCandidates = this._flagIsActive(this.FLAG_STRIP_UNLIKELYS);
|
|||
|
|
|
|||
|
|
// First, node prepping. Trash nodes that look cruddy (like ones with the
|
|||
|
|
// class name "comment", etc), and turn divs into P tags where they have been
|
|||
|
|
// used inappropriately (as in, where they contain no other block level elements.)
|
|||
|
|
var elementsToScore = [];
|
|||
|
|
var node = this._doc.documentElement;
|
|||
|
|
|
|||
|
|
let shouldRemoveTitleHeader = true;
|
|||
|
|
|
|||
|
|
while (node) {
|
|||
|
|
var matchString = node.className + " " + node.id;
|
|||
|
|
|
|||
|
|
if (this._isOmnivoreNode(node)) {
|
|||
|
|
node = this._getNextNode(node);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (!this._isProbablyVisible(node)) {
|
|||
|
|
this.log("Removing hidden node - " + matchString);
|
|||
|
|
node = this._removeAndGetNext(node);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// User is not able to see elements applied with both "aria-modal = true" and "role = dialog"
|
|||
|
|
if (node.getAttribute("aria-modal") == "true" && node.getAttribute("role") == "dialog") {
|
|||
|
|
node = this._removeAndGetNext(node);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Check to see if this node is a byline or published, and remove it if it is.
|
|||
|
|
if (this._checkByline(node, matchString) || this._checkPublishedDate(node, matchString)) {
|
|||
|
|
node = this._removeAndGetNext(node);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (shouldRemoveTitleHeader && this._headerDuplicatesTitle(node)) {
|
|||
|
|
const headingText = node.textContent.trim();
|
|||
|
|
const titleText = this._articleTitle.trim();
|
|||
|
|
this.log("Removing header: ", { headingText, titleText });
|
|||
|
|
shouldRemoveTitleHeader = false;
|
|||
|
|
// Replacing title with the heading if the title includes heading but heading is smaller
|
|||
|
|
// Example article: http://jsomers.net/i-should-have-loved-biology
|
|||
|
|
// Or if there is the specific attribute that we can lean on.
|
|||
|
|
// For example "headline" in this article - https://nymag.com/intelligencer/2020/12/four-seasons-total-landscaping-the-full-est-possible-story.html
|
|||
|
|
if ((titleText !== headingText && titleText.includes(headingText)) || this._someNodeAttribute(node, ({ value }) => value === 'headline')) {
|
|||
|
|
this.log('Replacing title with heading')
|
|||
|
|
this._articleTitle = headingText;
|
|||
|
|
}
|
|||
|
|
node = this._removeAndGetNext(node);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Remove unlikely candidates
|
|||
|
|
if (stripUnlikelyCandidates) {
|
|||
|
|
if (
|
|||
|
|
(this.REGEXPS.unlikelyCandidates.test(matchString) ||
|
|||
|
|
// Checking for the "data-testid" attribute as well for the NYTimes articles
|
|||
|
|
// Example article: https://www.nytimes.com/2021/03/31/world/americas/brazil-coronavirus-bolsonaro.html
|
|||
|
|
this.REGEXPS.unlikelyCandidates.test(node.dataset && node.dataset.testid) ||
|
|||
|
|
this.REGEXPS.unlikelyCandidates.test(node.getAttribute('aria-labelledby'))
|
|||
|
|
) &&
|
|||
|
|
!this.REGEXPS.okMaybeItsACandidate.test(matchString) &&
|
|||
|
|
!/tweet(-\w+)?/i.test(matchString) &&
|
|||
|
|
!/instagram/i.test(matchString) &&
|
|||
|
|
!this.isEmbed(node) &&
|
|||
|
|
!this._hasAncestorTag(node, "table") &&
|
|||
|
|
!this._hasAncestorTag(node, "code") &&
|
|||
|
|
// Example article - https://www.bbc.com/future/article/20170817-nasas-ambitious-plan-to-save-earth-from-a-supervolcano
|
|||
|
|
// Blockquote removed text example: "the conclusion that the supervolcano threat"
|
|||
|
|
!this._hasAncestorTag(node, "blockquote", 1) &&
|
|||
|
|
// The article content has been stripped out because of the DIV wrapper that includes word "SideBar"
|
|||
|
|
// inside of his className. So added option to not strip the node that has an ARTICLE element inside.
|
|||
|
|
// Example article - https://www.bbc.com/news/world-us-canada-55298015
|
|||
|
|
!(this._getAllNodesWithTag(node, ["article"]).length === 1) &&
|
|||
|
|
node.tagName !== "BODY" &&
|
|||
|
|
node.tagName !== "A") {
|
|||
|
|
this.log("Removing unlikely candidate - " + matchString);
|
|||
|
|
node = this._removeAndGetNext(node);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (this.UNLIKELY_ROLES.includes(node.getAttribute("role"))) {
|
|||
|
|
this.log("Removing content with role " + node.getAttribute("role") + " - " + matchString);
|
|||
|
|
node = this._removeAndGetNext(node);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// skip content modifications with embeds
|
|||
|
|
if (this.EMBEDS_CLASSES.includes(node.className) || this.isEmbed(node) || this.hasEmbed(node)) {
|
|||
|
|
node = this._getNextNode(node);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Remove DIV, SECTION, and HEADER nodes without any content(e.g. text, image, video, or iframe).
|
|||
|
|
if ((node.tagName === "DIV" || node.tagName === "SECTION" || node.tagName === "HEADER" ||
|
|||
|
|
node.tagName === "H1" || node.tagName === "H2" || node.tagName === "H3" ||
|
|||
|
|
node.tagName === "H4" || node.tagName === "H5" || node.tagName === "H6") &&
|
|||
|
|
this._isElementWithoutContent(node)) {
|
|||
|
|
node = this._removeAndGetNext(node);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Remove any container that's placed right before the h1 and most if its content is links
|
|||
|
|
if (node.nextElementSibling && node.nextElementSibling.tagName === 'H1' && this._getLinkDensity(node) > 0.5) {
|
|||
|
|
if (node.nextElementSibling.innerHTML === doc.getElementsByTagName('h1')[0].innerHTML) {
|
|||
|
|
node = this._removeAndGetNext(node);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (this.DEFAULT_TAGS_TO_SCORE.indexOf(node.tagName) !== -1) {
|
|||
|
|
elementsToScore.push(node);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Turn all divs that don't have children block level elements into p's
|
|||
|
|
if (node.tagName === "DIV") {
|
|||
|
|
// Put phrasing content into paragraphs.
|
|||
|
|
var p = null;
|
|||
|
|
var childNode = node.firstChild;
|
|||
|
|
while (childNode) {
|
|||
|
|
var nextSibling = childNode.nextSibling;
|
|||
|
|
if (this._isPhrasingContent(childNode)) {
|
|||
|
|
if (p !== null) {
|
|||
|
|
p.appendChild(childNode);
|
|||
|
|
} else if (!this._isWhitespace(childNode)) {
|
|||
|
|
p = doc.createElement("p");
|
|||
|
|
node.replaceChild(p, childNode);
|
|||
|
|
p.appendChild(childNode);
|
|||
|
|
}
|
|||
|
|
} else if (p !== null) {
|
|||
|
|
while (p.lastChild && this._isWhitespace(p.lastChild)) {
|
|||
|
|
p.removeChild(p.lastChild);
|
|||
|
|
}
|
|||
|
|
p = null;
|
|||
|
|
}
|
|||
|
|
childNode = nextSibling;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Sites like http://mobile.slate.com encloses each paragraph with a DIV
|
|||
|
|
// element. DIVs with only a P element inside and no text content can be
|
|||
|
|
// safely converted into plain P elements to avoid confusing the scoring
|
|||
|
|
// algorithm with DIVs with are, in practice, paragraphs.
|
|||
|
|
if (this._hasSingleTagInsideElement(node, "P") && this._getLinkDensity(node) < 0.25) {
|
|||
|
|
var newNode = node.children[0];
|
|||
|
|
node.parentNode.replaceChild(newNode, node);
|
|||
|
|
node = newNode;
|
|||
|
|
elementsToScore.push(node);
|
|||
|
|
} else if (!this._hasChildBlockElement(node)) {
|
|||
|
|
node = this._setNodeTag(node, "P");
|
|||
|
|
elementsToScore.push(node);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
node = this._getNextNode(node);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Loop through all paragraphs, and assign a score to them based on how content-y they look.
|
|||
|
|
* Then add their score to their parent node.
|
|||
|
|
*
|
|||
|
|
* A score is determined by things like number of commas, class names, etc. Maybe eventually link density.
|
|||
|
|
**/
|
|||
|
|
var candidates = [];
|
|||
|
|
this._forEachNode(elementsToScore, function(elementToScore) {
|
|||
|
|
if (!elementToScore.parentNode || typeof (elementToScore.parentNode.tagName) === "undefined")
|
|||
|
|
return;
|
|||
|
|
|
|||
|
|
// If this paragraph is less than 25 characters, don't even count it.
|
|||
|
|
var innerText = this._getInnerText(elementToScore);
|
|||
|
|
if (innerText.length < 25)
|
|||
|
|
return;
|
|||
|
|
|
|||
|
|
// Exclude nodes with no ancestor.
|
|||
|
|
var ancestors = this._getNodeAncestors(elementToScore, 5);
|
|||
|
|
if (ancestors.length === 0)
|
|||
|
|
return;
|
|||
|
|
|
|||
|
|
var contentScore = 0;
|
|||
|
|
|
|||
|
|
// Add a point for the paragraph itself as a base.
|
|||
|
|
contentScore += 1;
|
|||
|
|
|
|||
|
|
// Add points for any commas within this paragraph.
|
|||
|
|
contentScore += innerText.split(this.REGEXPS.commas).length;
|
|||
|
|
|
|||
|
|
// For every 100 characters in this paragraph, add another point. Up to 3 points.
|
|||
|
|
contentScore += Math.min(Math.floor(innerText.length / 100), 3);
|
|||
|
|
|
|||
|
|
// Initialize and score ancestors.
|
|||
|
|
this._forEachNode(ancestors, function(ancestor, level) {
|
|||
|
|
if (!ancestor.tagName || !ancestor.parentNode || typeof (ancestor.parentNode.tagName) === "undefined")
|
|||
|
|
return;
|
|||
|
|
|
|||
|
|
if (typeof (ancestor.readability) === "undefined") {
|
|||
|
|
this._initializeNode(ancestor);
|
|||
|
|
candidates.push(ancestor);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Node score divider:
|
|||
|
|
// - parent: 1 (no division)
|
|||
|
|
// - grandparent: 2
|
|||
|
|
// - great grandparent+: ancestor level * 3
|
|||
|
|
if (level === 0)
|
|||
|
|
var scoreDivider = 1;
|
|||
|
|
else if (level === 1)
|
|||
|
|
scoreDivider = 2;
|
|||
|
|
else
|
|||
|
|
scoreDivider = level * 3;
|
|||
|
|
ancestor.readability.contentScore += contentScore / scoreDivider;
|
|||
|
|
});
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
// After we've calculated scores, loop through all of the possible
|
|||
|
|
// candidate nodes we found and find the one with the highest score.
|
|||
|
|
var topCandidates = [];
|
|||
|
|
for (var c = 0, cl = candidates.length; c < cl; c += 1) {
|
|||
|
|
var candidate = candidates[c];
|
|||
|
|
|
|||
|
|
// Scale the final candidates score based on link density. Good content
|
|||
|
|
// should have a relatively small link density (5% or less) and be mostly
|
|||
|
|
// unaffected by this operation.
|
|||
|
|
var candidateScore = candidate.readability.contentScore * (1 - this._getLinkDensity(candidate));
|
|||
|
|
candidate.readability.contentScore = candidateScore;
|
|||
|
|
|
|||
|
|
this.log("Candidate:", candidate.nodeName, candidate.className, "with score " + candidateScore);
|
|||
|
|
|
|||
|
|
for (var t = 0; t < this._nbTopCandidates; t++) {
|
|||
|
|
var aTopCandidate = topCandidates[t];
|
|||
|
|
|
|||
|
|
if (!aTopCandidate || candidateScore > aTopCandidate.readability.contentScore) {
|
|||
|
|
topCandidates.splice(t, 0, candidate);
|
|||
|
|
if (topCandidates.length > this._nbTopCandidates)
|
|||
|
|
topCandidates.pop();
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var topCandidate = topCandidates[0] || null;
|
|||
|
|
var neededToCreateTopCandidate = false;
|
|||
|
|
var parentOfTopCandidate;
|
|||
|
|
|
|||
|
|
// If we still have no top candidate, just use the body as a last resort.
|
|||
|
|
// We also have to copy the body node so it is something we can modify.
|
|||
|
|
if (topCandidate === null || topCandidate.tagName === "BODY") {
|
|||
|
|
// Move all of the page's children into topCandidate
|
|||
|
|
topCandidate = doc.createElement("DIV");
|
|||
|
|
neededToCreateTopCandidate = true;
|
|||
|
|
// Move everything (not just elements, also text nodes etc.) into the container
|
|||
|
|
// so we even include text directly in the body:
|
|||
|
|
while (page.firstChild) {
|
|||
|
|
this.log("Moving child out:", page.firstChild);
|
|||
|
|
topCandidate.appendChild(page.firstChild);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
page.appendChild(topCandidate);
|
|||
|
|
|
|||
|
|
this._initializeNode(topCandidate);
|
|||
|
|
} else if (topCandidate) {
|
|||
|
|
// Find a better top candidate node if it contains (at least three) nodes which belong to `topCandidates` array
|
|||
|
|
// and whose scores are quite closed with current `topCandidate` node.
|
|||
|
|
var alternativeCandidateAncestors = [];
|
|||
|
|
for (var i = 1; i < topCandidates.length; i++) {
|
|||
|
|
if (topCandidates[i].readability.contentScore / topCandidate.readability.contentScore >= 0.75) {
|
|||
|
|
alternativeCandidateAncestors.push(this._getNodeAncestors(topCandidates[i]));
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
var MINIMUM_TOPCANDIDATES = 3;
|
|||
|
|
if (alternativeCandidateAncestors.length >= MINIMUM_TOPCANDIDATES) {
|
|||
|
|
parentOfTopCandidate = topCandidate.parentNode;
|
|||
|
|
while (parentOfTopCandidate.tagName !== "BODY") {
|
|||
|
|
var listsContainingThisAncestor = 0;
|
|||
|
|
for (var ancestorIndex = 0; ancestorIndex < alternativeCandidateAncestors.length && listsContainingThisAncestor < MINIMUM_TOPCANDIDATES; ancestorIndex++) {
|
|||
|
|
listsContainingThisAncestor += Number(alternativeCandidateAncestors[ancestorIndex].includes(parentOfTopCandidate));
|
|||
|
|
}
|
|||
|
|
if (listsContainingThisAncestor >= MINIMUM_TOPCANDIDATES) {
|
|||
|
|
topCandidate = parentOfTopCandidate;
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
parentOfTopCandidate = parentOfTopCandidate.parentNode;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (!topCandidate.readability) {
|
|||
|
|
this._initializeNode(topCandidate);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Because of our bonus system, parents of candidates might have scores
|
|||
|
|
// themselves. They get half of the node. There won't be nodes with higher
|
|||
|
|
// scores than our topCandidate, but if we see the score going *up* in the first
|
|||
|
|
// few steps up the tree, that's a decent sign that there might be more content
|
|||
|
|
// lurking in other places that we want to unify in. The sibling stuff
|
|||
|
|
// below does some of that - but only if we've looked high enough up the DOM
|
|||
|
|
// tree.
|
|||
|
|
parentOfTopCandidate = topCandidate.parentNode;
|
|||
|
|
var lastScore = topCandidate.readability.contentScore;
|
|||
|
|
// The scores shouldn't get too low.
|
|||
|
|
var scoreThreshold = lastScore / 3;
|
|||
|
|
while (parentOfTopCandidate.tagName !== "BODY") {
|
|||
|
|
// Stopping parentCandidates searching if nav bar has been found as a sibling node
|
|||
|
|
if (Array.from(parentOfTopCandidate.parentNode.childNodes).some(n => n.tagName === "NAV")) {
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
if (!parentOfTopCandidate.readability) {
|
|||
|
|
parentOfTopCandidate = parentOfTopCandidate.parentNode;
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
const parentScore = parentOfTopCandidate.readability.contentScore;
|
|||
|
|
if (parentScore < scoreThreshold) {
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
if (parentScore > lastScore) {
|
|||
|
|
// Alright! We found a better parent to use.
|
|||
|
|
topCandidate = parentOfTopCandidate;
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
lastScore = parentOfTopCandidate.readability.contentScore;
|
|||
|
|
parentOfTopCandidate = parentOfTopCandidate.parentNode;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// If the top candidate is the only child, use parent instead. This will help sibling
|
|||
|
|
// joining logic when adjacent content is actually located in parent's sibling node.
|
|||
|
|
while (parentOfTopCandidate.tagName !== "BODY" && parentOfTopCandidate.children.length === 1) {
|
|||
|
|
topCandidate = parentOfTopCandidate;
|
|||
|
|
parentOfTopCandidate = topCandidate.parentNode;
|
|||
|
|
}
|
|||
|
|
if (!topCandidate.readability) {
|
|||
|
|
this._initializeNode(topCandidate);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// fix is here, keep the best of previously found wrappers as a parent
|
|||
|
|
if (parentOfTopCandidate.tagName !== 'BODY') {
|
|||
|
|
topCandidate = parentOfTopCandidate
|
|||
|
|
this._initializeNode(topCandidate);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Now that we have the top candidate, look through its siblings for content
|
|||
|
|
// that might also be related. Things like preambles, content split by ads
|
|||
|
|
// that we removed, etc.
|
|||
|
|
var articleContent = doc.createElement("DIV");
|
|||
|
|
if (isPaging)
|
|||
|
|
articleContent.id = "readability-content";
|
|||
|
|
|
|||
|
|
var siblingScoreThreshold = Math.max(10, (topCandidate.readability?.contentScore || 0) * 0.2);
|
|||
|
|
// Keep potential top candidate's parent node to try to get text direction of it later.
|
|||
|
|
parentOfTopCandidate = topCandidate.parentNode;
|
|||
|
|
var siblings = parentOfTopCandidate.children;
|
|||
|
|
|
|||
|
|
for (var s = 0, sl = siblings.length; s < sl; s++) {
|
|||
|
|
var sibling = siblings[s];
|
|||
|
|
var append = false;
|
|||
|
|
|
|||
|
|
this.log("Looking at sibling node:", sibling.nodeName, sibling.className, sibling.readability ? ("with score " + sibling.readability.contentScore) : "");
|
|||
|
|
this.log("Sibling has score", sibling.readability ? sibling.readability.contentScore : "Unknown");
|
|||
|
|
|
|||
|
|
if (sibling === topCandidate) {
|
|||
|
|
append = true;
|
|||
|
|
} else {
|
|||
|
|
var contentBonus = 0;
|
|||
|
|
|
|||
|
|
// Give a bonus if sibling nodes and top candidates have the example same classname
|
|||
|
|
if (sibling.className === topCandidate.className && topCandidate.className !== "") {
|
|||
|
|
contentBonus += topCandidate.readability.contentScore * 0.2;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (sibling.readability &&
|
|||
|
|
((sibling.readability.contentScore + contentBonus) >= siblingScoreThreshold)) {
|
|||
|
|
append = true;
|
|||
|
|
} else if (sibling.nodeName === "P") {
|
|||
|
|
var linkDensity = this._getLinkDensity(sibling);
|
|||
|
|
var nodeContent = this._getInnerText(sibling);
|
|||
|
|
var nodeLength = nodeContent.length;
|
|||
|
|
|
|||
|
|
if (nodeLength > 80 && linkDensity < 0.25) {
|
|||
|
|
append = true;
|
|||
|
|
} else if (nodeLength < 80 && nodeLength > 0 && linkDensity === 0 &&
|
|||
|
|
nodeContent.search(/\.( |$)/) !== -1) {
|
|||
|
|
append = true;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (append) {
|
|||
|
|
this.log("Appending node:", sibling.nodeName);
|
|||
|
|
|
|||
|
|
if (this.ALTER_TO_DIV_EXCEPTIONS.indexOf(sibling.nodeName) === -1) {
|
|||
|
|
// We have a node that isn't a common block level element, like a form or td tag.
|
|||
|
|
// Turn it into a div so it doesn't get filtered out later by accident.
|
|||
|
|
this.log("Altering sibling:", sibling, "to div.");
|
|||
|
|
|
|||
|
|
sibling = this._setNodeTag(sibling, "DIV");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
articleContent.appendChild(sibling);
|
|||
|
|
// Fetch children again to make it compatible
|
|||
|
|
// with DOM parsers without live collection support.
|
|||
|
|
siblings = parentOfTopCandidate.children;
|
|||
|
|
// siblings is a reference to the children array, and
|
|||
|
|
// sibling is removed from the array when we call appendChild().
|
|||
|
|
// As a result, we must revisit this index since the nodes
|
|||
|
|
// have been shifted.
|
|||
|
|
s -= 1;
|
|||
|
|
sl -= 1;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Checking for the figures inside of the <header> tags and appending them to the content if not there aleady,
|
|||
|
|
// b/c some articles contains first image nested into the <header> elemens that is not considered as an article content at all.
|
|||
|
|
// Example article: https://www.vanityfair.com/news/2020/12/trump-vaccine-summit-herd-immunity
|
|||
|
|
const headerNodes = this._doc.documentElement && this._getAllNodesWithTag(this._doc.documentElement, ['HEADER']);
|
|||
|
|
const alreadyExistingFigures = this._getAllNodesWithTag(articleContent, ['FIGURE']);
|
|||
|
|
headerNodes && this._forEachNode(headerNodes, headerNode => {
|
|||
|
|
if (!headerNode || !headerNode.readability || !headerNode.readability.contentScore)
|
|||
|
|
return;
|
|||
|
|
|
|||
|
|
const figures = this._getAllNodesWithTag(headerNode, ['FIGURE']);
|
|||
|
|
this._forEachNode(figures, figure => {
|
|||
|
|
if (!this._someNode(alreadyExistingFigures, existingFigure => existingFigure === figure)) {
|
|||
|
|
this.log(`Prepending figure to the article`, { className: figure.className, scr: figure.src })
|
|||
|
|
articleContent.prepend(figure)
|
|||
|
|
}
|
|||
|
|
})
|
|||
|
|
})
|
|||
|
|
|
|||
|
|
if (this._debug)
|
|||
|
|
this.log("Article content pre-prep: ", { content: articleContent.innerHTML });
|
|||
|
|
// So we have all of the content that we need. Now we clean it up for presentation.
|
|||
|
|
await this._prepArticle(articleContent);
|
|||
|
|
|
|||
|
|
if (this._debug)
|
|||
|
|
this.log("Article content post-prep: ", { content: articleContent.innerHTML });
|
|||
|
|
|
|||
|
|
if (neededToCreateTopCandidate) {
|
|||
|
|
// We already created a fake div thing, and there wouldn't have been any siblings left
|
|||
|
|
// for the previous loop, so there's no point trying to create a new div, and then
|
|||
|
|
// move all the children over. Just assign IDs and class names here. No need to append
|
|||
|
|
// because that already happened anyway.
|
|||
|
|
topCandidate.id = "readability-page-1";
|
|||
|
|
topCandidate.className = "page";
|
|||
|
|
} else {
|
|||
|
|
var div = doc.createElement("DIV");
|
|||
|
|
div.id = "readability-page-1";
|
|||
|
|
div.className = "page";
|
|||
|
|
while (articleContent.firstChild) {
|
|||
|
|
div.appendChild(articleContent.firstChild);
|
|||
|
|
}
|
|||
|
|
articleContent.appendChild(div);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (this._debug)
|
|||
|
|
this.log("Article content after paging: " + articleContent.innerHTML);
|
|||
|
|
|
|||
|
|
var parseSuccessful = true;
|
|||
|
|
|
|||
|
|
// Now that we've gone through the full algorithm, check to see if
|
|||
|
|
// we got any meaningful content. If we didn't, we may need to re-run
|
|||
|
|
// grabArticle with different flags set. This gives us a higher likelihood of
|
|||
|
|
// finding the content, and the sieve approach gives us a higher likelihood of
|
|||
|
|
// finding the -right- content.
|
|||
|
|
var textLength = this._getInnerText(articleContent, true).length;
|
|||
|
|
if (textLength < this._charThreshold) {
|
|||
|
|
parseSuccessful = false;
|
|||
|
|
page.innerHTML = pageCacheHtml;
|
|||
|
|
|
|||
|
|
if (this._flagIsActive(this.FLAG_STRIP_UNLIKELYS)) {
|
|||
|
|
this._removeFlag(this.FLAG_STRIP_UNLIKELYS);
|
|||
|
|
this._attempts.push({ articleContent: articleContent, textLength: textLength });
|
|||
|
|
} else if (this._flagIsActive(this.FLAG_WEIGHT_CLASSES)) {
|
|||
|
|
this._removeFlag(this.FLAG_WEIGHT_CLASSES);
|
|||
|
|
this._attempts.push({ articleContent: articleContent, textLength: textLength });
|
|||
|
|
} else if (this._flagIsActive(this.FLAG_CLEAN_CONDITIONALLY)) {
|
|||
|
|
this._removeFlag(this.FLAG_CLEAN_CONDITIONALLY);
|
|||
|
|
this._attempts.push({ articleContent: articleContent, textLength: textLength });
|
|||
|
|
} else {
|
|||
|
|
this._attempts.push({ articleContent: articleContent, textLength: textLength });
|
|||
|
|
// No luck after removing flags, just return the longest text we found during the different loops
|
|||
|
|
this._attempts.sort(function(a, b) {
|
|||
|
|
return b.textLength - a.textLength;
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
// But first check if we actually have something
|
|||
|
|
if (!this._attempts[0].textLength && !this._attempts[0].articleContent) {
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
articleContent = this._attempts[0].articleContent;
|
|||
|
|
parseSuccessful = true;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (parseSuccessful) {
|
|||
|
|
// Find out text direction from ancestors of final top candidate.
|
|||
|
|
var ancestors = [parentOfTopCandidate, topCandidate].concat(this._getNodeAncestors(parentOfTopCandidate));
|
|||
|
|
this._someNode(ancestors, function(ancestor) {
|
|||
|
|
if (!ancestor.tagName)
|
|||
|
|
return false;
|
|||
|
|
var articleDir = ancestor.getAttribute("dir");
|
|||
|
|
if (articleDir) {
|
|||
|
|
this._articleDir = articleDir;
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
return false;
|
|||
|
|
});
|
|||
|
|
return articleContent;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Check whether the input string could be a byline.
|
|||
|
|
* This verifies that the input is a string, and that the length
|
|||
|
|
* is less than 100 chars.
|
|||
|
|
*
|
|||
|
|
* @param possibleByline {string} - a string to check whether its a byline.
|
|||
|
|
* @return Boolean - whether the input string is a byline.
|
|||
|
|
*/
|
|||
|
|
_isValidByline: function (byline) {
|
|||
|
|
if (typeof byline == "string" || byline instanceof String) {
|
|||
|
|
byline = byline.trim();
|
|||
|
|
return (byline.length > 0) && (byline.length < 100);
|
|||
|
|
}
|
|||
|
|
return false;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Check whether the input string could be a published date.
|
|||
|
|
* This verifies that the input is a string, and that the length
|
|||
|
|
* is less than 100 chars.
|
|||
|
|
*
|
|||
|
|
* @param possiblePublishedDate {string} - a string to check whether its a published date.
|
|||
|
|
* @return Boolean - whether the input string is a published date.
|
|||
|
|
*/
|
|||
|
|
_isValidPublishedDate: function(publishedDate) {
|
|||
|
|
if (typeof publishedDate == "string" || publishedDate instanceof String) {
|
|||
|
|
publishedDate = publishedDate.trim();
|
|||
|
|
return (publishedDate.length > 0) && (publishedDate.length < 50);
|
|||
|
|
}
|
|||
|
|
return false;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Converts some of the common HTML entities in string to their corresponding characters.
|
|||
|
|
*
|
|||
|
|
* @param str {string} - a string to unescape.
|
|||
|
|
* @return string without HTML entity.
|
|||
|
|
*/
|
|||
|
|
_unescapeHtmlEntities: function (str) {
|
|||
|
|
if (!str) {
|
|||
|
|
return str;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return htmlEntities.decode(str);
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Finds entity inside of the JSONLD graphs and returns value from the specified field
|
|||
|
|
* @param {object} parsedJSONLD - JSONLD parsed object to find inside
|
|||
|
|
* @param {string} id - id of the entity to find
|
|||
|
|
* @param {string} resultField - resulting field to grab value from
|
|||
|
|
* @returns {*} resulting field value
|
|||
|
|
* @example
|
|||
|
|
* this._findJSONLDRecordById(parsedData, "https://danwang.co/2020-letter/#primaryimage", "url")
|
|||
|
|
* // Finds "ImageObject" with specified ID and returns url of the image
|
|||
|
|
*/
|
|||
|
|
_findJSONLDRecordById: function (parsedJSONLD, id, resultField) {
|
|||
|
|
if (!parsedJSONLD || !parsedJSONLD['@graph'] || !Array.isArray(parsedJSONLD['@graph']))
|
|||
|
|
return;
|
|||
|
|
|
|||
|
|
const resultObject = parsedJSONLD['@graph'].find(it => it["@id"] === id);
|
|||
|
|
return resultObject && resultObject[resultField];
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Try to extract metadata from JSON-LD object.
|
|||
|
|
* For now, only Schema.org objects of type Article or its subtypes are supported.
|
|||
|
|
* @return Object with any metadata that could be extracted (possibly none)
|
|||
|
|
*/
|
|||
|
|
_getJSONLD: function (doc) {
|
|||
|
|
const scripts = this._getAllNodesWithTag(doc, ["script"]);
|
|||
|
|
const jsonLdElements = [];
|
|||
|
|
|
|||
|
|
// Parsing all JSONLD elements since the article might contain couple of them at once
|
|||
|
|
// Example article: https://nymag.com/intelligencer/2020/12/four-seasons-total-landscaping-the-full-est-possible-story.html
|
|||
|
|
this._forEachNode(scripts, function (el) {
|
|||
|
|
if (el.getAttribute("type") === "application/ld+json")
|
|||
|
|
jsonLdElements.push(el)
|
|||
|
|
})
|
|||
|
|
|
|||
|
|
if (jsonLdElements.length) {
|
|||
|
|
try {
|
|||
|
|
// Strip CDATA markers if present
|
|||
|
|
const contents = jsonLdElements.map(el => el.textContent.replace(/^\s*<!\[CDATA\[|\]\]>\s*$/g, ""));
|
|||
|
|
let parsedData = {"@context": "https://schema.org", "@graph": []};
|
|||
|
|
contents.forEach(content => {
|
|||
|
|
let parsedContent = JSON.parse(content);
|
|||
|
|
|
|||
|
|
if (Array.isArray(parsedContent))
|
|||
|
|
parsedData['@graph'] = parsedData['@graph'].concat(parsedContent)
|
|||
|
|
else
|
|||
|
|
parsedData['@graph'].push(parsedContent)
|
|||
|
|
})
|
|||
|
|
|
|||
|
|
if (parsedData['@graph'].length === 1) parsedData = parsedData['@graph'][0]
|
|||
|
|
|
|||
|
|
let parsedArticleInfo = parsedData;
|
|||
|
|
|
|||
|
|
this.log(`JSONLD script found from ${scripts.length} scripts:`, {contents, parsed: parsedData})
|
|||
|
|
|
|||
|
|
var metadata = {};
|
|||
|
|
if (
|
|||
|
|
!parsedData["@context"] ||
|
|||
|
|
!parsedData["@context"].match(/^https?\:\/\/schema\.org$/)
|
|||
|
|
) {
|
|||
|
|
this.log(`Context hasn't matched!`, {context: parsedData["@context"]})
|
|||
|
|
return metadata;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (!parsedData["@type"] && Array.isArray(parsedData["@graph"])) {
|
|||
|
|
parsedArticleInfo = parsedData["@graph"].find((it) => {
|
|||
|
|
return (it["@type"] || "").match(
|
|||
|
|
this.REGEXPS.jsonLdArticleTypes
|
|||
|
|
);
|
|||
|
|
});
|
|||
|
|
this.log(`Parsed after: `, {parsed: parsedArticleInfo})
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (typeof parsedArticleInfo.name === "string" && typeof parsedArticleInfo.headline === "string" && parsedArticleInfo.name !== parsedArticleInfo.headline) {
|
|||
|
|
// we have both name and headline element in the JSON-LD. They should both be the same but some websites like aktualne.cz
|
|||
|
|
// put their own name into "name" and the article title to "headline" which confuses Readability. So we try to check if either
|
|||
|
|
// "name" or "headline" closely matches the html title, and if so, use that one. If not, then we use "name" by default.
|
|||
|
|
|
|||
|
|
var title = this._getArticleTitle();
|
|||
|
|
var nameMatches = this._textSimilarity(parsedArticleInfo.name, title) > 0.75;
|
|||
|
|
var headlineMatches = this._textSimilarity(parsedArticleInfo.headline, title) > 0.75;
|
|||
|
|
|
|||
|
|
if (headlineMatches && !nameMatches) {
|
|||
|
|
metadata.title = parsedArticleInfo.headline;
|
|||
|
|
} else {
|
|||
|
|
metadata.title = parsedArticleInfo.name;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
} else if (typeof parsedArticleInfo.name === "string") {
|
|||
|
|
metadata.title = parsedArticleInfo.name.trim();
|
|||
|
|
} else if (typeof parsedArticleInfo.headline === "string") {
|
|||
|
|
metadata.title = parsedArticleInfo.headline.trim();
|
|||
|
|
}
|
|||
|
|
if (parsedArticleInfo.author) {
|
|||
|
|
if (typeof parsedArticleInfo.author === 'string') {
|
|||
|
|
metadata.byline = parsedArticleInfo.author.trim();
|
|||
|
|
} else if (typeof parsedArticleInfo.author.name === "string") {
|
|||
|
|
metadata.byline = parsedArticleInfo.author.name.trim();
|
|||
|
|
} else if (Array.isArray(parsedArticleInfo.author) && parsedArticleInfo.author[0] && typeof parsedArticleInfo.author[0].name === "string") {
|
|||
|
|
metadata.byline = parsedArticleInfo.author
|
|||
|
|
.filter(function (author) {
|
|||
|
|
return author && typeof author.name === "string";
|
|||
|
|
})
|
|||
|
|
.map(function (author) {
|
|||
|
|
return author.name.trim();
|
|||
|
|
})
|
|||
|
|
.join(", ");
|
|||
|
|
} else if (parsedArticleInfo.author["@id"]) {
|
|||
|
|
metadata.byline = this._findJSONLDRecordById(parsedData, parsedArticleInfo.author["@id"], 'name')
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (typeof parsedArticleInfo.description === "string") {
|
|||
|
|
metadata.excerpt = parsedArticleInfo.description.trim();
|
|||
|
|
}
|
|||
|
|
if (
|
|||
|
|
parsedArticleInfo.publisher &&
|
|||
|
|
typeof parsedArticleInfo.publisher.name === "string"
|
|||
|
|
) {
|
|||
|
|
metadata.siteName = parsedArticleInfo.publisher.name.trim();
|
|||
|
|
}
|
|||
|
|
if (parsedArticleInfo.datePublished && typeof parsedArticleInfo.datePublished === 'string') {
|
|||
|
|
metadata.publishedDate = parsedArticleInfo.datePublished.trim();
|
|||
|
|
}
|
|||
|
|
if (typeof parsedArticleInfo.image === "string") {
|
|||
|
|
metadata.previewImage = parsedArticleInfo.image.trim();
|
|||
|
|
} else if (Array.isArray(parsedArticleInfo.image) && parsedArticleInfo.image[0] && typeof parsedArticleInfo.image[0] === 'string') {
|
|||
|
|
metadata.previewImage = parsedArticleInfo.image[0];
|
|||
|
|
} else if (parsedArticleInfo.image) {
|
|||
|
|
if (typeof parsedArticleInfo.image.url === 'string')
|
|||
|
|
metadata.previewImage = parsedArticleInfo.image.url.trim()
|
|||
|
|
else if (parsedArticleInfo.image["@id"])
|
|||
|
|
metadata.previewImage = this._findJSONLDRecordById(parsedData, parsedArticleInfo.image["@id"], 'url')
|
|||
|
|
}
|
|||
|
|
return metadata;
|
|||
|
|
} catch (err) {
|
|||
|
|
this.log(err.message);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return {};
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Attempts to get excerpt and byline metadata for the article.
|
|||
|
|
*
|
|||
|
|
* @param {Object} jsonld — object containing any metadata that
|
|||
|
|
* could be extracted from JSON-LD object.
|
|||
|
|
*
|
|||
|
|
* @return Object with optional "excerpt" and "byline" properties
|
|||
|
|
*/
|
|||
|
|
_getArticleMetadata: function (jsonld) {
|
|||
|
|
var metadata = {};
|
|||
|
|
var values = {};
|
|||
|
|
var metaElements = this._doc.getElementsByTagName("meta");
|
|||
|
|
|
|||
|
|
// property is a space-separated list of values
|
|||
|
|
var propertyPattern = /\s*(dc|dcterm|og|twitter|article)\s*:\s*(locale|author|creator|description|title|site_name|published_time|published|date|image)\s*/gi;
|
|||
|
|
|
|||
|
|
// name is a single value
|
|||
|
|
var namePattern = /^\s*(?:(dc|dcterm|og|twitter|weibo:(article|webpage))\s*[\.:]\s*)?(author|creator|description|title|site_name|date|image)\s*$/i;
|
|||
|
|
|
|||
|
|
// Find description tags.
|
|||
|
|
this._forEachNode(metaElements, function (element) {
|
|||
|
|
var elementName = element.getAttribute("name");
|
|||
|
|
var elementProperty = element.getAttribute("property");
|
|||
|
|
var content = element.getAttribute("content");
|
|||
|
|
|
|||
|
|
this.log(`______Meta tag review:`, `elementName: ${elementName}`, `elementProperty: ${elementProperty}`, `content: ${content}`);
|
|||
|
|
|
|||
|
|
if (!content) {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
var matches = null;
|
|||
|
|
var name = null;
|
|||
|
|
|
|||
|
|
if (elementProperty) {
|
|||
|
|
matches = elementProperty.match(propertyPattern);
|
|||
|
|
if (matches) {
|
|||
|
|
// Convert to lowercase, and remove any whitespace
|
|||
|
|
// so we can match below.
|
|||
|
|
name = matches[0].toLowerCase().replace(/\s/g, "");
|
|||
|
|
|
|||
|
|
// Only setting value for the images that is the valid URL address,
|
|||
|
|
// since it might find values like "og:image:height" which will match the RegExp
|
|||
|
|
// Article example: https://www.dailymail.co.uk/news/article-8868177/Pregnant-Katharine-McPhee-David-Foster-house-hunting-Harry-Meghans-Montecito-enclave.html
|
|||
|
|
if (name.includes('image')) {
|
|||
|
|
if (!isNaN(content.trim())) {
|
|||
|
|
/* skip width and height numbers */
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
try {
|
|||
|
|
// allow relative URLs
|
|||
|
|
new URL(content.trim(), new URL(this._baseURI).origin);
|
|||
|
|
} catch (error) {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
// multiple authors
|
|||
|
|
values[name] = content.trim();
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (!matches && elementName && namePattern.test(elementName)) {
|
|||
|
|
name = elementName;
|
|||
|
|
if (content) {
|
|||
|
|
// Convert to lowercase, remove any whitespace, and convert dots
|
|||
|
|
// to colons so we can match below.
|
|||
|
|
name = name.toLowerCase().replace(/\s/g, "").replace(/\./g, ":");
|
|||
|
|
values[name] = content.trim();
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
// get title
|
|||
|
|
const titlesArray = [
|
|||
|
|
jsonld.title,
|
|||
|
|
values["twitter:title"],
|
|||
|
|
values["title"],
|
|||
|
|
values["dc:title"],
|
|||
|
|
values["dcterm:title"],
|
|||
|
|
values["og:title"],
|
|||
|
|
values["weibo:article:title"],
|
|||
|
|
values["weibo:webpage:title"]
|
|||
|
|
];
|
|||
|
|
|
|||
|
|
// Selecting shortest title from the titles array
|
|||
|
|
// For example: "Why Is Apple’s M1 Chip So Fast?" instead of "Why Is Apple’s M1 Chip So Fast? | Debugger"
|
|||
|
|
// Article example: https://debugger.medium.com/why-is-apples-m1-chip-so-fast-3262b158cba2
|
|||
|
|
metadata.title = titlesArray.reduce((res, example) => {
|
|||
|
|
if (!res || (example && res !== example && res.includes(example)))
|
|||
|
|
res = example;
|
|||
|
|
return res;
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
if (!metadata.title) {
|
|||
|
|
metadata.title = this._getArticleTitle();
|
|||
|
|
metadata.titleNotFoundFromMetainfo = true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// get author
|
|||
|
|
metadata.byline = jsonld.byline ||
|
|||
|
|
values["dc:creator"] ||
|
|||
|
|
values["dcterm:creator"] ||
|
|||
|
|
values["author"];
|
|||
|
|
|
|||
|
|
// get description
|
|||
|
|
metadata.excerpt = jsonld.excerpt ||
|
|||
|
|
values["twitter:description"] ||
|
|||
|
|
values["description"] ||
|
|||
|
|
values["dc:description"] ||
|
|||
|
|
values["dcterm:description"] ||
|
|||
|
|
values["og:description"] ||
|
|||
|
|
values["weibo:article:description"] ||
|
|||
|
|
values["weibo:webpage:description"];
|
|||
|
|
|
|||
|
|
// get site name
|
|||
|
|
metadata.siteName = jsonld.siteName ||
|
|||
|
|
values["og:site_name"] ||
|
|||
|
|
values["twitter:site"] ||
|
|||
|
|
values["site_name"] ||
|
|||
|
|
values["twitter:domain"];
|
|||
|
|
|
|||
|
|
// get website icon
|
|||
|
|
const siteIcon = this._doc.querySelector(
|
|||
|
|
"link[rel='apple-touch-icon'], link[rel='shortcut icon'], link[rel='icon']"
|
|||
|
|
);
|
|||
|
|
if (siteIcon) {
|
|||
|
|
const iconHref = siteIcon.getAttribute("href");
|
|||
|
|
if (iconHref) {
|
|||
|
|
if (this.REGEXPS.b64DataUrl.test(iconHref)) {
|
|||
|
|
// base64 encoded image
|
|||
|
|
metadata.siteIcon = iconHref;
|
|||
|
|
} else {
|
|||
|
|
// allow relative URLs
|
|||
|
|
metadata.siteIcon = this.toAbsoluteURI(iconHref);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// get published date
|
|||
|
|
metadata.publishedDate = jsonld.publishedDate ||
|
|||
|
|
values["date"] ||
|
|||
|
|
values["article:published_time"] ||
|
|||
|
|
values["article:published"] ||
|
|||
|
|
values["published_time"] ||
|
|||
|
|
values["published"] ||
|
|||
|
|
values["article:date"];
|
|||
|
|
|
|||
|
|
// get preview image
|
|||
|
|
metadata.previewImage = jsonld.previewImage ||
|
|||
|
|
values["image"] ||
|
|||
|
|
values["twitter:image"] ||
|
|||
|
|
values["dc:image"] ||
|
|||
|
|
values["dcterm:image"] ||
|
|||
|
|
values["og:image"] ||
|
|||
|
|
values["weibo:article:image"] ||
|
|||
|
|
values["weibo:webpage:image"];
|
|||
|
|
|
|||
|
|
metadata.locale = values["og:locale"];
|
|||
|
|
|
|||
|
|
// TODO: Add canonical ULR search here as well
|
|||
|
|
|
|||
|
|
// in many sites the meta value is escaped with HTML entities,
|
|||
|
|
// so here we need to unescape it
|
|||
|
|
metadata.title = this._unescapeHtmlEntities(metadata.title);
|
|||
|
|
metadata.byline = this._unescapeHtmlEntities(metadata.byline);
|
|||
|
|
metadata.excerpt = this._unescapeHtmlEntities(metadata.excerpt);
|
|||
|
|
metadata.siteName = this._unescapeHtmlEntities(metadata.siteName);
|
|||
|
|
metadata.siteIcon = this._unescapeHtmlEntities(metadata.siteIcon);
|
|||
|
|
metadata.previewImage = this._unescapeHtmlEntities(metadata.previewImage);
|
|||
|
|
|
|||
|
|
if (metadata.previewImage) {
|
|||
|
|
// convert any relative URL path to absolute URL
|
|||
|
|
try {
|
|||
|
|
metadata.previewImage = new URL(metadata.previewImage, new URL(this._baseURI).origin).href;
|
|||
|
|
} catch {
|
|||
|
|
delete metadata.previewImage;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
try {
|
|||
|
|
metadata.publishedDate = metadata.publishedDate && new Date(this._unescapeHtmlEntities(metadata.publishedDate))
|
|||
|
|
if (!(metadata.publishedDate instanceof Date) || isNaN(metadata.publishedDate)) {
|
|||
|
|
delete metadata.publishedDate
|
|||
|
|
}
|
|||
|
|
} catch {
|
|||
|
|
delete metadata.publishedDate
|
|||
|
|
}
|
|||
|
|
this.log(`___Metadata:`, {jsonld, values, metadata});
|
|||
|
|
|
|||
|
|
return metadata;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Check if node is image, or if node contains exactly only one image
|
|||
|
|
* whether as a direct child or as its descendants.
|
|||
|
|
*
|
|||
|
|
* @param Element
|
|||
|
|
**/
|
|||
|
|
_isSingleImage: function (node) {
|
|||
|
|
if (node.tagName === "IMG") {
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (node.children.length !== 1 || node.textContent.trim() !== "") {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return this._isSingleImage(node.children[0]);
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Find all <noscript> that are located after <img> nodes, and which contain only one
|
|||
|
|
* <img> element. Replace the first image with the image from inside the <noscript> tag,
|
|||
|
|
* and remove the <noscript> tag. This improves the quality of the images we use on
|
|||
|
|
* some sites (e.g. Medium).
|
|||
|
|
*
|
|||
|
|
* @param Element
|
|||
|
|
**/
|
|||
|
|
_unwrapNoscriptImages: function (doc) {
|
|||
|
|
// Find img without source or attributes that might contains image, and remove it.
|
|||
|
|
// This is done to prevent a placeholder img is replaced by img from noscript in next step.
|
|||
|
|
var imgs = Array.from(doc.getElementsByTagName("img"));
|
|||
|
|
this._forEachNode(imgs, function (img) {
|
|||
|
|
for (var i = 0; i < img.attributes.length; i++) {
|
|||
|
|
var attr = img.attributes[i];
|
|||
|
|
switch (attr.name) {
|
|||
|
|
case "src":
|
|||
|
|
case "srcset":
|
|||
|
|
case "data-src":
|
|||
|
|
case "data-srcset":
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (/\.(jpg|jpeg|png|webp)/i.test(attr.value)) {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
img.parentNode.removeChild(img);
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
// Next find noscript and try to extract its image
|
|||
|
|
var noscripts = Array.from(doc.getElementsByTagName("noscript"));
|
|||
|
|
this._forEachNode(noscripts, function (noscript) {
|
|||
|
|
// Parse content of noscript and make sure it only contains image
|
|||
|
|
var tmp = doc.createElement("div");
|
|||
|
|
tmp.innerHTML = noscript.innerHTML;
|
|||
|
|
if (!this._isSingleImage(tmp)) {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// If noscript has previous sibling and it only contains image,
|
|||
|
|
// replace it with noscript content. However we also keep old
|
|||
|
|
// attributes that might contains image.
|
|||
|
|
var prevElement = noscript.previousElementSibling;
|
|||
|
|
if (prevElement && this._isSingleImage(prevElement)) {
|
|||
|
|
var prevImg = prevElement;
|
|||
|
|
if (prevImg.tagName !== "IMG") {
|
|||
|
|
prevImg = prevElement.getElementsByTagName("img")[0];
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var newImg = tmp.getElementsByTagName("img")[0];
|
|||
|
|
for (var i = 0; i < prevImg.attributes.length; i++) {
|
|||
|
|
var attr = prevImg.attributes[i];
|
|||
|
|
if (attr.value === "") {
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (attr.name === "src" || attr.name === "srcset" || /\.(jpg|jpeg|png|webp)/i.test(attr.value)) {
|
|||
|
|
if (newImg.getAttribute(attr.name) === attr.value) {
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var attrName = attr.name;
|
|||
|
|
if (newImg.hasAttribute(attrName)) {
|
|||
|
|
attrName = "data-old-" + attrName;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
newImg.setAttribute(attrName, attr.value);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
noscript.parentNode.replaceChild(tmp.firstElementChild, prevElement);
|
|||
|
|
}
|
|||
|
|
});
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Removes script tags from the document.
|
|||
|
|
*
|
|||
|
|
* @param Element
|
|||
|
|
**/
|
|||
|
|
_removeScripts: function (doc) {
|
|||
|
|
this._removeNodes(this._getAllNodesWithTag(doc, ["script", "noscript"]));
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Check if this node has only whitespace and a single element with given tag
|
|||
|
|
* Returns false if the DIV node contains non-empty text nodes
|
|||
|
|
* or if it contains no element with given tag or more than 1 element.
|
|||
|
|
*
|
|||
|
|
* @param Element
|
|||
|
|
* @param string tag of child element
|
|||
|
|
**/
|
|||
|
|
_hasSingleTagInsideElement: function (element, tag) {
|
|||
|
|
// There should be exactly 1 element child with given tag
|
|||
|
|
if (element.children.length != 1 || element.children[0].tagName !== tag) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// And there should be no text nodes with real content
|
|||
|
|
return !this._someNode(element.childNodes, function (node) {
|
|||
|
|
return node.nodeType === this.TEXT_NODE &&
|
|||
|
|
this.REGEXPS.hasContent.test(node.textContent);
|
|||
|
|
});
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
_isElementWithoutContent: function (node) {
|
|||
|
|
return node.nodeType === this.ELEMENT_NODE &&
|
|||
|
|
node.textContent.trim().length == 0 &&
|
|||
|
|
(node.children.length == 0 ||
|
|||
|
|
node.children.length == node.getElementsByTagName("br").length + node.getElementsByTagName("hr").length);
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Determine whether element has any children block level elements.
|
|||
|
|
*
|
|||
|
|
* @param Element
|
|||
|
|
*/
|
|||
|
|
_hasChildBlockElement: function (element) {
|
|||
|
|
return this._someNode(element.childNodes, function (node) {
|
|||
|
|
return this.DIV_TO_P_ELEMS.has(node.tagName) ||
|
|||
|
|
this._hasChildBlockElement(node);
|
|||
|
|
});
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/***
|
|||
|
|
* Determine if a node qualifies as phrasing content.
|
|||
|
|
* https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/Content_categories#Phrasing_content
|
|||
|
|
**/
|
|||
|
|
_isPhrasingContent: function (node) {
|
|||
|
|
return node.nodeType === this.TEXT_NODE || this.PHRASING_ELEMS.indexOf(node.tagName) !== -1 ||
|
|||
|
|
((node.tagName === "A" || node.tagName === "DEL" || node.tagName === "INS") &&
|
|||
|
|
this._everyNode(node.childNodes, this._isPhrasingContent)) ||
|
|||
|
|
// check if a link is followed by a text node
|
|||
|
|
// this means that a link is placed somewhere in the text
|
|||
|
|
(node.tagName === "A" && node.nextSibling && node.nextSibling.nodeType === 3) ||
|
|||
|
|
// font nodes shouldn't be independent elements
|
|||
|
|
(node.tagName === "FONT" && node.previousSibling && node.previousSibling.nodeType === 1);
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
_isWhitespace: function (node) {
|
|||
|
|
return (node.nodeType === this.TEXT_NODE && node.textContent.trim().length === 0) ||
|
|||
|
|
(node.nodeType === this.ELEMENT_NODE && node.tagName === "BR");
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Get the inner text of a node - cross browser compatibly.
|
|||
|
|
* This also strips out any excess whitespace to be found.
|
|||
|
|
*
|
|||
|
|
* @param Element
|
|||
|
|
* @param Boolean normalizeSpaces (default: true)
|
|||
|
|
* @return string
|
|||
|
|
**/
|
|||
|
|
_getInnerText: function (e, normalizeSpaces) {
|
|||
|
|
normalizeSpaces = (typeof normalizeSpaces === "undefined") ? true : normalizeSpaces;
|
|||
|
|
var textContent = e.textContent.trim();
|
|||
|
|
|
|||
|
|
if (normalizeSpaces) {
|
|||
|
|
return textContent.replace(this.REGEXPS.normalize, " ");
|
|||
|
|
}
|
|||
|
|
return textContent;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Get the number of times a string s appears in the node e.
|
|||
|
|
*
|
|||
|
|
* @param Element
|
|||
|
|
* @param string - what to split on. Default is ","
|
|||
|
|
* @return number (integer)
|
|||
|
|
**/
|
|||
|
|
_getCharCount: function (e, s) {
|
|||
|
|
s = s || ",";
|
|||
|
|
return this._getInnerText(e).split(s).length - 1;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Remove the style attribute on every e and under.
|
|||
|
|
* TODO: Test if getElementsByTagName(*) is faster.
|
|||
|
|
*
|
|||
|
|
* @param Element
|
|||
|
|
* @return void
|
|||
|
|
**/
|
|||
|
|
_cleanStyles: function (e) {
|
|||
|
|
if (!e || e.tagName.toLowerCase() === "svg")
|
|||
|
|
return;
|
|||
|
|
|
|||
|
|
// Remove `style` and deprecated presentational attributes
|
|||
|
|
for (var i = 0; i < this.PRESENTATIONAL_ATTRIBUTES.length; i++) {
|
|||
|
|
e.removeAttribute(this.PRESENTATIONAL_ATTRIBUTES[i]);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (this.DEPRECATED_SIZE_ATTRIBUTE_ELEMS.indexOf(e.tagName) !== -1) {
|
|||
|
|
e.removeAttribute("width");
|
|||
|
|
e.removeAttribute("height");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var cur = e.firstElementChild;
|
|||
|
|
while (cur !== null) {
|
|||
|
|
this._cleanStyles(cur);
|
|||
|
|
cur = cur.nextElementSibling;
|
|||
|
|
}
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
_createInstagramPostPlaceholder: function (element, postId) {
|
|||
|
|
const post = this._doc.createElement('div');
|
|||
|
|
post.innerText = 'Instagram placeholder';
|
|||
|
|
post.className = 'instagram-placeholder';
|
|||
|
|
post.setAttribute('data-instagram-id', postId);
|
|||
|
|
element.parentNode.replaceChild(post, element);
|
|||
|
|
|
|||
|
|
// remove all containers the IG post is nested in (if they contain the post only)
|
|||
|
|
let postParent = post.parentElement || post.parentNode;
|
|||
|
|
while (postParent && postParent.children.length === 1) {
|
|||
|
|
postParent.parentNode.replaceChild(post, postParent);
|
|||
|
|
postParent = post.parentElement || post.parentNode;
|
|||
|
|
}
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
_createPlaceholders: async function (e) {
|
|||
|
|
for (const element of Array.from(e.getElementsByTagName('a'))) {
|
|||
|
|
if (this.isEmbed(element)) {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Create tweets placeholders from links
|
|||
|
|
if (element.href.includes('twitter.com') || (element.parentNode && element.parentNode.className === 'tweet')) {
|
|||
|
|
const link = element.href;
|
|||
|
|
const regex = /(https?:\/\/twitter\.com\/\w+\/status\/)(\d+)/gm;
|
|||
|
|
const match = regex.exec(link);
|
|||
|
|
|
|||
|
|
if (Array.isArray(match) && typeof match[2] === 'string' && parentClassIncludes(element, 'tweet')) {
|
|||
|
|
const tweet = this._doc.createElement('div');
|
|||
|
|
tweet.innerText = 'Tweet placeholder';
|
|||
|
|
tweet.className = 'tweet-placeholder';
|
|||
|
|
tweet.setAttribute('data-tweet-id', match[2]);
|
|||
|
|
element.parentNode.replaceChildren(tweet);
|
|||
|
|
|
|||
|
|
// remove all containers the tweet is nested in (if they contain the tweet only)
|
|||
|
|
let tweetParent = tweet.parentElement || tweet.parentNode;
|
|||
|
|
while (tweetParent && tweetParent.children.length === 1 && tweetParent.parentNode) {
|
|||
|
|
tweetParent.parentNode.replaceChild(tweet, tweetParent);
|
|||
|
|
tweetParent = tweet.parentElement || tweet.parentNode;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (tweetParent && tweetParent.className.includes('twitter-tweet') && tweetParent.parentNode) {
|
|||
|
|
tweetParent.parentNode.replaceChild(tweet, tweetParent);
|
|||
|
|
}
|
|||
|
|
} else if (element.parentNode && element.parentNode.className === 'tweet') {
|
|||
|
|
// Create tweets placeholders from classname
|
|||
|
|
try {
|
|||
|
|
const response = await axios.get(link);
|
|||
|
|
const tweetUrl = response.request.res.responseUrl;
|
|||
|
|
const match = regex.exec(tweetUrl);
|
|||
|
|
if (Array.isArray(match) && typeof match[2] === 'string') {
|
|||
|
|
const tweet = this._doc.createElement('div');
|
|||
|
|
tweet.innerText = 'Tweet placeholder';
|
|||
|
|
tweet.className = 'tweet-placeholder';
|
|||
|
|
tweet.setAttribute('data-tweet-id', match[2]);
|
|||
|
|
element.parentNode.replaceWith(tweet);
|
|||
|
|
}
|
|||
|
|
} catch (e) {
|
|||
|
|
this.log('Error loading tweet: ', link, e);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Create instagram posts placeholders from links
|
|||
|
|
if (element.href.includes('instagram.com/p')) {
|
|||
|
|
const link = element.href;
|
|||
|
|
const regex = /https?:\/\/(www\.)?instagram.com\/p\/(\w+)\//gm;
|
|||
|
|
const match = regex.exec(link);
|
|||
|
|
|
|||
|
|
if (Array.isArray(match) && typeof match[2] === 'string' && parentClassIncludes(element, 'instagram')) {
|
|||
|
|
this._createInstagramPostPlaceholder(element, match[2]);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
Array.from(e.getElementsByTagName('iframe')).forEach(element => {
|
|||
|
|
|
|||
|
|
// Create tweets placeholders from iframes
|
|||
|
|
if (element.getAttribute('data-tweet-id')) {
|
|||
|
|
const tweet = this._doc.createElement('div');
|
|||
|
|
tweet.innerText = 'Tweet placeholder';
|
|||
|
|
tweet.className = 'tweet-placeholder';
|
|||
|
|
tweet.setAttribute('data-tweet-id', element.getAttribute('data-tweet-id'));
|
|||
|
|
element.parentNode.replaceChild(tweet, element);
|
|||
|
|
|
|||
|
|
// remove all containers the tweet is nested in (if they contain the tweet only)
|
|||
|
|
let tweetParent = tweet.parentElement || tweet.parentNode;
|
|||
|
|
while (tweetParent && tweetParent.children.length === 1) {
|
|||
|
|
tweetParent.parentNode.replaceChild(tweet, tweetParent);
|
|||
|
|
tweetParent = tweet.parentElement || tweet.parentNode;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Create instagram posts placeholders from iframes
|
|||
|
|
if (element.getAttribute('src')?.includes('instagram.com/p')) {
|
|||
|
|
const url = element.getAttribute('src');
|
|||
|
|
const regex = /https?:\/\/(www\.)?instagram.com\/p\/(\w+)\//gm;
|
|||
|
|
const match = regex.exec(url);
|
|||
|
|
|
|||
|
|
if (Array.isArray(match) && typeof match[2] === 'string') {
|
|||
|
|
this._createInstagramPostPlaceholder(element, match[2]);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
});
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
// Check whether an element is a child of an embed
|
|||
|
|
isEmbed: function (element) {
|
|||
|
|
while (element.parentNode && element.parentNode.tagName !== 'BODY') {
|
|||
|
|
if (this.EMBEDS_CLASSES.includes(element.className)) {
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
element = element.parentNode;
|
|||
|
|
}
|
|||
|
|
return false
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
hasEmbed: function(element) {
|
|||
|
|
if (element.querySelector === undefined) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
const classes = this.EMBEDS_CLASSES.reduce((res, cur, i) => `${i > 0 && (res + ',')}.${cur}`, '');
|
|||
|
|
|
|||
|
|
const candidates = element.querySelector(classes);
|
|||
|
|
return !!candidates;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Get the density of links as a percentage of the content
|
|||
|
|
* This is the amount of text that is inside a link divided by the total text in the node.
|
|||
|
|
*
|
|||
|
|
* @param Element
|
|||
|
|
* @return number (float)
|
|||
|
|
**/
|
|||
|
|
_getLinkDensity: function(element) {
|
|||
|
|
// If we are ignoring link density (often we do this for newsletters, just set it to zero so all link density checks pass)
|
|||
|
|
if (this._ignoreLinkDensity) {
|
|||
|
|
return 0
|
|||
|
|
}
|
|||
|
|
var textLength = this._getInnerText(element).length;
|
|||
|
|
if (textLength === 0)
|
|||
|
|
return 0;
|
|||
|
|
|
|||
|
|
var linkLength = 0;
|
|||
|
|
|
|||
|
|
// XXX implement _reduceNodeList?
|
|||
|
|
this._forEachNode(element.getElementsByTagName("a"), function(linkNode) {
|
|||
|
|
var href = linkNode.getAttribute("href");
|
|||
|
|
var coefficient = href && this.REGEXPS.hashUrl.test(href) ? 0.3 : 1;
|
|||
|
|
// Disabling link density counting for inside the figure caption, because they are mostly the links
|
|||
|
|
// for the author of the photo.
|
|||
|
|
// Article fix example: https://medium.com/@Kasturi/two-things-can-make-you-money-without-a-9-5-job-9bdf6da8b09c
|
|||
|
|
// - First large photo with a 2 links inside of the caption
|
|||
|
|
linkNode.parentNode.tagName !== "FIGCAPTION" && (linkLength += this._getInnerText(linkNode).length * coefficient);
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
return linkLength / textLength;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Get an elements class/id weight. Uses regular expressions to tell if this
|
|||
|
|
* element looks good or bad.
|
|||
|
|
*
|
|||
|
|
* @param Element
|
|||
|
|
* @return number (Integer)
|
|||
|
|
**/
|
|||
|
|
_getClassWeight: function(e) {
|
|||
|
|
if (!this._flagIsActive(this.FLAG_WEIGHT_CLASSES))
|
|||
|
|
return 0;
|
|||
|
|
|
|||
|
|
var weight = 0;
|
|||
|
|
|
|||
|
|
// Look for a special classname
|
|||
|
|
if (typeof(e.className) === "string" && e.className !== "") {
|
|||
|
|
if (this.REGEXPS.negative.test(e.className))
|
|||
|
|
weight -= 25;
|
|||
|
|
|
|||
|
|
if (this.REGEXPS.positive.test(e.className))
|
|||
|
|
weight += 25;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Look for a special ID
|
|||
|
|
if (typeof(e.id) === "string" && e.id !== "") {
|
|||
|
|
if (this.REGEXPS.negative.test(e.id))
|
|||
|
|
weight -= 25;
|
|||
|
|
|
|||
|
|
if (this.REGEXPS.positive.test(e.id))
|
|||
|
|
weight += 25;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return weight;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Clean a node of all elements of type "tag".
|
|||
|
|
* (Unless it's a youtube/vimeo video. People love movies.)
|
|||
|
|
*
|
|||
|
|
* @param Element
|
|||
|
|
* @param string tag to clean
|
|||
|
|
* @return void
|
|||
|
|
**/
|
|||
|
|
_clean: function(e, tag) {
|
|||
|
|
var isEmbed = ["object", "embed", "iframe"].indexOf(tag) !== -1;
|
|||
|
|
|
|||
|
|
this._removeNodes(this._getAllNodesWithTag(e, [tag]), function(element) {
|
|||
|
|
// Allow youtube and vimeo videos through as people usually want to see those.
|
|||
|
|
if (isEmbed) {
|
|||
|
|
// First, check the elements attributes to see if any of them contain youtube or vimeo
|
|||
|
|
for (var i = 0; i < element.attributes.length; i++) {
|
|||
|
|
if (this.REGEXPS.videos.test(element.attributes[i].value)) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// For embed with <object> tag, check inner HTML as well.
|
|||
|
|
if (element.tagName === "object" && this.REGEXPS.videos.test(element.innerHTML)) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Disabling aside elements removing if it contains only the BLOCKQUOTE element and taking it out of the aside node
|
|||
|
|
// Related to the article - https://www.atlasobscura.com/articles/grapefruit-history-and-drug-interactions
|
|||
|
|
// Content example: "Citrus hybridizes so easily that there are undoubtedly thousands"...
|
|||
|
|
if (element.children.length === 1 && element.children[0].tagName === "BLOCKQUOTE") {
|
|||
|
|
element.parentNode.replaceChild(element.children[0], element);
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return true;
|
|||
|
|
});
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Check if a given node has one of its ancestor tag name matching the
|
|||
|
|
* provided one.
|
|||
|
|
* @param HTMLElement node
|
|||
|
|
* @param String tagName
|
|||
|
|
* @param Number maxDepth
|
|||
|
|
* @param Function filterFn a filter to invoke to determine whether this node 'counts'
|
|||
|
|
* @return Boolean
|
|||
|
|
*/
|
|||
|
|
_hasAncestorTag: function(node, tagName, maxDepth, filterFn) {
|
|||
|
|
maxDepth = maxDepth || 3;
|
|||
|
|
tagName = tagName.toUpperCase();
|
|||
|
|
var depth = 0;
|
|||
|
|
while (node.parentNode) {
|
|||
|
|
if (maxDepth > 0 && depth > maxDepth)
|
|||
|
|
return false;
|
|||
|
|
if (node.parentNode.tagName === tagName && (!filterFn || filterFn(node.parentNode)))
|
|||
|
|
return true;
|
|||
|
|
node = node.parentNode;
|
|||
|
|
depth++;
|
|||
|
|
}
|
|||
|
|
return false;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Return an object indicating how many rows and columns this table has.
|
|||
|
|
*/
|
|||
|
|
_getRowAndColumnCount: function(table) {
|
|||
|
|
var rows = 0;
|
|||
|
|
var columns = 0;
|
|||
|
|
var trs = table.getElementsByTagName("tr");
|
|||
|
|
for (var i = 0; i < trs.length; i++) {
|
|||
|
|
var rowspan = trs[i].getAttribute("rowspan") || 0;
|
|||
|
|
if (rowspan) {
|
|||
|
|
rowspan = parseInt(rowspan, 10);
|
|||
|
|
}
|
|||
|
|
rows += (rowspan || 1);
|
|||
|
|
|
|||
|
|
// Now look for column-related info
|
|||
|
|
var columnsInThisRow = 0;
|
|||
|
|
var cells = trs[i].getElementsByTagName("td");
|
|||
|
|
for (var j = 0; j < cells.length; j++) {
|
|||
|
|
var colspan = cells[j].getAttribute("colspan") || 0;
|
|||
|
|
if (colspan) {
|
|||
|
|
colspan = parseInt(colspan, 10);
|
|||
|
|
}
|
|||
|
|
columnsInThisRow += (colspan || 1);
|
|||
|
|
}
|
|||
|
|
columns = Math.max(columns, columnsInThisRow);
|
|||
|
|
}
|
|||
|
|
return {rows: rows, columns: columns};
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Look for 'data' (as opposed to 'layout') tables, for which we use
|
|||
|
|
* similar checks as
|
|||
|
|
* https://dxr.mozilla.org/mozilla-central/rev/71224049c0b52ab190564d3ea0eab089a159a4cf/accessible/html/HTMLTableAccessible.cpp#920
|
|||
|
|
*/
|
|||
|
|
_markDataTables: function(root) {
|
|||
|
|
var tables = root.getElementsByTagName("table");
|
|||
|
|
for (var i = 0; i < tables.length; i++) {
|
|||
|
|
var table = tables[i];
|
|||
|
|
var role = table.getAttribute("role");
|
|||
|
|
if (role == "presentation") {
|
|||
|
|
table._readabilityDataTable = false;
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
var datatable = table.getAttribute("datatable");
|
|||
|
|
if (datatable == "0") {
|
|||
|
|
table._readabilityDataTable = false;
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
var summary = table.getAttribute("summary");
|
|||
|
|
if (summary) {
|
|||
|
|
table._readabilityDataTable = true;
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var caption = table.getElementsByTagName("caption")[0];
|
|||
|
|
if (caption && caption.childNodes.length > 0) {
|
|||
|
|
table._readabilityDataTable = true;
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// If the table has a descendant with any of these tags, consider a data table:
|
|||
|
|
var dataTableDescendants = ["col", "colgroup", "tfoot", "thead", "th"];
|
|||
|
|
var descendantExists = function(tag) {
|
|||
|
|
return !!table.getElementsByTagName(tag)[0];
|
|||
|
|
};
|
|||
|
|
if (dataTableDescendants.some(descendantExists)) {
|
|||
|
|
this.log("Data table because found data-y descendant");
|
|||
|
|
table._readabilityDataTable = true;
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Nested tables indicate a layout table:
|
|||
|
|
if (table.getElementsByTagName("table")[0]) {
|
|||
|
|
table._readabilityDataTable = false;
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var sizeInfo = this._getRowAndColumnCount(table);
|
|||
|
|
if (sizeInfo.rows >= 10 || sizeInfo.columns > 4) {
|
|||
|
|
table._readabilityDataTable = true;
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
// Now just go by size entirely:
|
|||
|
|
table._readabilityDataTable = sizeInfo.rows * sizeInfo.columns > 10;
|
|||
|
|
}
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/* convert images and figures that have properties like data-src into images that can be loaded without JS */
|
|||
|
|
_fixLazyImages: function (root) {
|
|||
|
|
this._forEachNode(this._getAllNodesWithTag(root, ["img", "picture", "figure", "svg"]), function (elem) {
|
|||
|
|
// Checking and removing small sqaure images, in most cases redundant small author photo or svg buttons
|
|||
|
|
var imgHeight = parseInt(elem.getAttribute("height") || 0);
|
|||
|
|
var imgWidhth = parseInt(elem.getAttribute("width") || 0);
|
|||
|
|
if (imgHeight && imgWidhth && imgHeight === imgWidhth) {
|
|||
|
|
if (elem.tagName.toLowerCase() === 'svg') {
|
|||
|
|
if(imgHeight <= 21){
|
|||
|
|
this.log(`Removing small square SVG: ${imgWidhth}x${imgHeight}`, `className: ${elem.className}`, `src: ${elem.src}`);
|
|||
|
|
elem.parentNode.removeChild(elem);
|
|||
|
|
}
|
|||
|
|
return;
|
|||
|
|
} else if(imgHeight <= 80) {
|
|||
|
|
this.log(`Removing small square image: ${imgWidhth}x${imgHeight}`, `className: ${elem.className}`, `src: ${elem.src}`);
|
|||
|
|
elem.parentNode.removeChild(elem);
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Setting element "data-src" attribute value to the src if not specified.
|
|||
|
|
// Article example: https://nymag.com/intelligencer/2020/12/four-seasons-total-landscaping-the-full-est-possible-story.html
|
|||
|
|
if (!elem.getAttribute('src') && elem.dataset && elem.dataset.src) {
|
|||
|
|
elem.setAttribute('src', elem.dataset.src)
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (elem.getAttribute('data-lazy-src')) {
|
|||
|
|
elem.setAttribute('src', elem.getAttribute('data-lazy-src'))
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// In some sites (e.g. Kotaku), they put 1px square image as base64 data uri in the src attribute.
|
|||
|
|
// So, here we check if the data uri is too short, just might as well remove it.
|
|||
|
|
if (elem.src && this.REGEXPS.b64DataUrl.test(elem.src)) {
|
|||
|
|
// Make sure it's not SVG, because SVG can have a meaningful image in under 133 bytes.
|
|||
|
|
var parts = this.REGEXPS.b64DataUrl.exec(elem.src);
|
|||
|
|
if (parts[1] === "image/svg+xml") {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Make sure this element has other attributes which contains image.
|
|||
|
|
// If it doesn't, then this src is important and shouldn't be removed.
|
|||
|
|
var srcCouldBeRemoved = false;
|
|||
|
|
for (var i = 0; i < elem.attributes.length; i++) {
|
|||
|
|
var attr = elem.attributes[i];
|
|||
|
|
if (attr.name === "src") {
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (/\.(jpg|jpeg|png|webp)/i.test(attr.value)) {
|
|||
|
|
srcCouldBeRemoved = true;
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Here we assume if image is less than 100 bytes (or 133B after encoded to base64)
|
|||
|
|
// it will be too small, therefore it might be placeholder image.
|
|||
|
|
if (srcCouldBeRemoved) {
|
|||
|
|
var b64starts = elem.src.search(/base64\s*/i) + 7;
|
|||
|
|
var b64length = elem.src.length - b64starts;
|
|||
|
|
if (b64length < 133) {
|
|||
|
|
elem.removeAttribute("src");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// also check for "null" to work around https://github.com/jsdom/jsdom/issues/2580
|
|||
|
|
if ((elem.src || (elem.srcset && elem.srcset != "null")) && elem.className.toLowerCase().indexOf("lazy") === -1) {
|
|||
|
|
// Removing image that is redundant loading placeholder
|
|||
|
|
// Example article: https://www.instyle.com/celebrity/gigi-hadid/gigi-hadid-bangs-2020 (image className: "loadingPlaceholder")
|
|||
|
|
if (elem.className && this.REGEXPS.lazyLoadingElements.test(elem.className)) {
|
|||
|
|
elem.parentNode.removeChild(elem);
|
|||
|
|
}
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
for (var j = 0; j < elem.attributes.length; j++) {
|
|||
|
|
attr = elem.attributes[j];
|
|||
|
|
if (attr.name === "src" || attr.name === "srcset") {
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
var copyTo = null;
|
|||
|
|
if (/\.(jpg|jpeg|png|webp)\s+\d/.test(attr.value)) {
|
|||
|
|
copyTo = "srcset";
|
|||
|
|
} else if (/^\s*\S+\.(jpg|jpeg|png|webp)\S*\s*$/.test(attr.value)) {
|
|||
|
|
copyTo = "src";
|
|||
|
|
}
|
|||
|
|
if (copyTo) {
|
|||
|
|
//if this is an img or picture, set the attribute directly
|
|||
|
|
if (elem.tagName === "IMG" || elem.tagName === "PICTURE") {
|
|||
|
|
elem.setAttribute(copyTo, attr.value);
|
|||
|
|
} else if (elem.tagName === "FIGURE" && !this._getAllNodesWithTag(elem, ["img", "picture"]).length) {
|
|||
|
|
//if the item is a <figure> that does not contain an image or picture, create one and place it inside the figure
|
|||
|
|
//see the nytimes-3 testcase for an example
|
|||
|
|
var img = this._doc.createElement("img");
|
|||
|
|
img.setAttribute(copyTo, attr.value);
|
|||
|
|
elem.appendChild(img);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
});
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
_getTextDensity: function(e, tags) {
|
|||
|
|
var textLength = this._getInnerText(e, true).length;
|
|||
|
|
if (textLength === 0) {
|
|||
|
|
return 0;
|
|||
|
|
}
|
|||
|
|
var childrenLength = 0;
|
|||
|
|
var children = this._getAllNodesWithTag(e, tags);
|
|||
|
|
this._forEachNode(children, (child) => childrenLength += this._getInnerText(child, true).length);
|
|||
|
|
return childrenLength / textLength;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Clean an element of all tags of type "tag" if they look fishy.
|
|||
|
|
* "Fishy" is an algorithm based on content length, classnames, link density, number of images & embeds, etc.
|
|||
|
|
*
|
|||
|
|
* @return void
|
|||
|
|
**/
|
|||
|
|
_cleanConditionally: function(e, tag) {
|
|||
|
|
if (!this._flagIsActive(this.FLAG_CLEAN_CONDITIONALLY))
|
|||
|
|
return;
|
|||
|
|
|
|||
|
|
// Traverse backwards so we can remove nodes at the same time
|
|||
|
|
// without effecting the traversal.
|
|||
|
|
//
|
|||
|
|
// TODO: Consider taking into account original contentScore here.
|
|||
|
|
this._removeNodes(this._getAllNodesWithTag(e, [tag]), function(node) {
|
|||
|
|
// First check if this node IS data table, in which case don't remove it.
|
|||
|
|
var isDataTable = function(t) {
|
|||
|
|
return t._readabilityDataTable;
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
// Do not clean placeholders
|
|||
|
|
if (this.PLACEHOLDER_CLASSES.includes(node.className)) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var isList = tag === "ul" || tag === "ol";
|
|||
|
|
|
|||
|
|
// If a list is related to navigation, it should be removed
|
|||
|
|
if (isList && this._isProbablyNavigation(node)) {
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (!isList) {
|
|||
|
|
var listLength = 0;
|
|||
|
|
var listNodes = this._getAllNodesWithTag(node, ["ul", "ol"]);
|
|||
|
|
this._forEachNode(listNodes, (list) => listLength += this._getInnerText(list).length);
|
|||
|
|
isList = listLength / this._getInnerText(node).length > 0.9;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (tag === "table" && isDataTable(node)) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Next check if we're inside a data table, in which case don't remove it as well.
|
|||
|
|
if (this._hasAncestorTag(node, "table", -1, isDataTable)) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (this._hasAncestorTag(node, "code")) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Avoiding lazyloaded images container removing
|
|||
|
|
// TODO: Rework this logic to work in a more robust and flexible way, this solution is fragile
|
|||
|
|
// Article example: https://nymag.com/intelligencer/2020/12/four-seasons-total-landscaping-the-full-est-possible-story.html
|
|||
|
|
if (node.children.length === 1 && node.children[0].tagName.toLowerCase() === 'picture') {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var weight = this._getClassWeight(node);
|
|||
|
|
|
|||
|
|
var contentScore = 0;
|
|||
|
|
|
|||
|
|
if (weight + contentScore < 0) {
|
|||
|
|
this.log("Cleaning Conditionally by weight", { text: node.innerText, className: node.className, children: Array.from(node.children).map(ch => ch.tagName)});
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (this._getCharCount(node, ",") < 10) {
|
|||
|
|
// If there are not very many commas, and the number of
|
|||
|
|
// non-paragraph elements is more than paragraphs or other
|
|||
|
|
// ominous signs, remove the element.
|
|||
|
|
var p = node.getElementsByTagName("p").length;
|
|||
|
|
var img = node.getElementsByTagName("img").length;
|
|||
|
|
var li = node.getElementsByTagName("li").length - 100;
|
|||
|
|
var input = node.getElementsByTagName("input").length;
|
|||
|
|
var headingDensity = this._getTextDensity(node, ["h1", "h2", "h3", "h4", "h5", "h6"]);
|
|||
|
|
|
|||
|
|
var embedCount = 0;
|
|||
|
|
var embeds = this._getAllNodesWithTag(node, ["object", "embed", "iframe"]);
|
|||
|
|
|
|||
|
|
for (var i = 0; i < embeds.length; i++) {
|
|||
|
|
// If this embed has attribute that matches video regex, don't delete it.
|
|||
|
|
for (var j = 0; j < embeds[i].attributes.length; j++) {
|
|||
|
|
if (this.REGEXPS.videos.test(embeds[i].attributes[j].value)) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// For embed with <object> tag, check inner HTML as well.
|
|||
|
|
if (embeds[i].tagName === "object" && this.REGEXPS.videos.test(embeds[i].innerHTML)) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
embedCount++;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var innerText = this._getInnerText(node)
|
|||
|
|
var linkDensity = this._getLinkDensity(node);
|
|||
|
|
var contentLength = innerText.length;
|
|||
|
|
|
|||
|
|
const emojiRegex = /[\u{1F600}-\u{1F64F}\u{1F300}-\u{1F5FF}\u{1F680}-\u{1F6FF}\u{1F700}-\u{1F77F}\u{1F780}-\u{1F7FF}\u{1F800}-\u{1F8FF}\u{2600}-\u{26FF}\u{2700}-\u{27BF}\u{1F900}-\u{1F9FF}\u{1FA00}-\u{1FA6F}\u{1FA70}-\u{1FAFF}]/gu;
|
|||
|
|
const textHasEmoji = Array.from(innerText.matchAll(emojiRegex)).length > 0
|
|||
|
|
|
|||
|
|
if (hasTweetInChildren(node)) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (this.isEmbed(node) || this.hasEmbed(node)) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var parentClasses = node.parentNode?.classList || [];
|
|||
|
|
var haveToRemove =
|
|||
|
|
!this._isOmnivoreNode(node) && (
|
|||
|
|
(img > 1 && p / img < 0.5 && !this._hasAncestorTag(node, "figure")) ||
|
|||
|
|
(!isList && li > p) ||
|
|||
|
|
(input > Math.floor(p/3)) ||
|
|||
|
|
(!isList && headingDensity < 0.9 && contentLength < 25 && !textHasEmoji && (img === 0 || img > 2) && !this._hasAncestorTag(node, "figure")) ||
|
|||
|
|
// ignores link density for the links inside the .post-body div (the main content)
|
|||
|
|
(!isList && weight < 25 && linkDensity > 0.2 && !(this.CLASSES_TO_SKIP.some((c) => parentClasses.contains(c))) )||
|
|||
|
|
// some website like https://substack.com might have their custom styling of tweets
|
|||
|
|
// we should omit ignoring their particular case by checking against "tweet" classname
|
|||
|
|
(weight >= 25 && linkDensity > 0.5 && !(node.className === "tweet" && linkDensity === 1)) ||
|
|||
|
|
((embedCount === 1 && contentLength < 75) || embedCount > 1))
|
|||
|
|
|
|||
|
|
// Allow simple lists of images to remain in pages
|
|||
|
|
if (isList && haveToRemove) {
|
|||
|
|
for (var x = 0; x < node.children.length; x++) {
|
|||
|
|
let child = node.children[x];
|
|||
|
|
// Don't filter in lists with li's that contain more than one child
|
|||
|
|
if (child.children.length > 1) {
|
|||
|
|
return haveToRemove;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
var li_count = node.getElementsByTagName("li").length;
|
|||
|
|
// Only allow the list to remain if every li contains an image
|
|||
|
|
if (img === li_count) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (haveToRemove) {
|
|||
|
|
this.log("Cleaning Conditionally", { className: node.className, children: Array.from(node.children).map(ch => ch.tagName) });
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return haveToRemove;
|
|||
|
|
}
|
|||
|
|
return false;
|
|||
|
|
});
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
_isOmnivoreNode: function(node) {
|
|||
|
|
const prefix = '_omnivore'
|
|||
|
|
var walk = node
|
|||
|
|
|
|||
|
|
while (walk) {
|
|||
|
|
if (walk.className && walk.className.startsWith && walk.className.startsWith(prefix)) {
|
|||
|
|
return true
|
|||
|
|
}
|
|||
|
|
if (walk.className && walk.className.hasOwnProperty && walk.className.hasOwnProperty(prefix)) {
|
|||
|
|
return true
|
|||
|
|
}
|
|||
|
|
walk = walk.parentElement
|
|||
|
|
}
|
|||
|
|
return false
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Clean out elements that match the specified conditions
|
|||
|
|
*
|
|||
|
|
* @param Element
|
|||
|
|
* @param Function determines whether a node should be removed
|
|||
|
|
* @return void
|
|||
|
|
**/
|
|||
|
|
_cleanMatchedNodes: function(e, filter) {
|
|||
|
|
var endOfSearchMarkerNode = this._getNextNode(e, true);
|
|||
|
|
var next = this._getNextNode(e);
|
|||
|
|
while (next && next != endOfSearchMarkerNode) {
|
|||
|
|
if (filter.call(this, next, next.className + " " + next.id)) {
|
|||
|
|
next = this._removeAndGetNext(next);
|
|||
|
|
} else {
|
|||
|
|
next = this._getNextNode(next);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Clean out spurious headers from an Element.
|
|||
|
|
*
|
|||
|
|
* @param Element
|
|||
|
|
* @return void
|
|||
|
|
**/
|
|||
|
|
_cleanHeaders: function (e) {
|
|||
|
|
const WEIGHT_MEANING_HEADERS = ['h1', 'h2']
|
|||
|
|
let headingNodes = this._getAllNodesWithTag(e, ["h1", "h2", "h3"]);
|
|||
|
|
let nodeToRemove = this._findNode(headingNodes, (node) => {
|
|||
|
|
let heading = this._getInnerText(node, false);
|
|||
|
|
return this._textSimilarity(this._articleTitle, heading) > 0.75 ||
|
|||
|
|
WEIGHT_MEANING_HEADERS.includes(node.tagName.toLowerCase()) && this._getClassWeight(node) < 0;
|
|||
|
|
});
|
|||
|
|
if (nodeToRemove) {
|
|||
|
|
this._removeNodes([nodeToRemove]);
|
|||
|
|
}
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Check if this node is an H1 or H2 element whose content is mostly
|
|||
|
|
* the same as the article title.
|
|||
|
|
*
|
|||
|
|
* @param Element the node to check.
|
|||
|
|
* @return boolean indicating whether this is a title-like header.
|
|||
|
|
*/
|
|||
|
|
_headerDuplicatesTitle: function(node) {
|
|||
|
|
if (node.tagName !== "H1" && node.tagName !== "H2") {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
var heading = this._getInnerText(node, false);
|
|||
|
|
return this._textSimilarity(this._articleTitle, heading) > 0.75;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
_flagIsActive: function(flag) {
|
|||
|
|
return (this._flags & flag) > 0;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
_removeFlag: function(flag) {
|
|||
|
|
this._flags = this._flags & ~flag;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
_isProbablyVisible: function(node) {
|
|||
|
|
// Have to null-check node.style and node.className.indexOf to deal with SVG and MathML nodes.
|
|||
|
|
return (!node.style || node.style.display !== "none")
|
|||
|
|
&& (node.style && node.style.visibility !== 'hidden')
|
|||
|
|
&& !node.hasAttribute("hidden")
|
|||
|
|
//check for "fallback-image" so that wikimedia math images are displayed
|
|||
|
|
&& (!node.hasAttribute("aria-hidden")
|
|||
|
|
|| !(node.getAttribute("aria-hidden") === "true" && node.parentElement.tagName.toLowerCase() !== 'figcaption')
|
|||
|
|
|| (node.className && node.className.indexOf && node.className.indexOf("fallback-image") !== -1));
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
_isProbablyNavigation: function(node) {
|
|||
|
|
const navRelatedClasses = /next|prev|previous/g;
|
|||
|
|
|
|||
|
|
if (node.tagName !== 'OL' && node.tagName !== 'UL') {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
const children = Array.from(node.getElementsByTagName('li'));
|
|||
|
|
for (const child of children) {
|
|||
|
|
if (navRelatedClasses.test(child.className) && node.getElementsByTagName('a') !== null) {
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return false;
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
_getLanguage: function(code) {
|
|||
|
|
if (!code) {
|
|||
|
|
// Default to English
|
|||
|
|
return 'English';
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
try {
|
|||
|
|
let lang = new Intl.DisplayNames(['en'], {type: 'language'});
|
|||
|
|
return lang.of(code.split('_')[0]);
|
|||
|
|
} catch {
|
|||
|
|
return 'English'
|
|||
|
|
}
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Runs readability.
|
|||
|
|
*
|
|||
|
|
* Workflow:
|
|||
|
|
* 1. Prep the document by removing script tags, css, etc.
|
|||
|
|
* 2. Build readability's DOM tree.
|
|||
|
|
* 3. Grab the article content from the current dom tree.
|
|||
|
|
* 4. Replace the current DOM tree with the new one.
|
|||
|
|
* 5. Read peacefully.
|
|||
|
|
*
|
|||
|
|
**/
|
|||
|
|
parse: async function() {
|
|||
|
|
// Avoid parsing too large documents, as per configuration option
|
|||
|
|
if (this._maxElemsToParse > 0) {
|
|||
|
|
var numTags = this._doc.getElementsByTagName("*").length;
|
|||
|
|
if (numTags > this._maxElemsToParse) {
|
|||
|
|
throw new Error("Aborting parsing document; " + numTags + " elements found");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Unwrap image from noscript
|
|||
|
|
this._unwrapNoscriptImages(this._doc);
|
|||
|
|
|
|||
|
|
// Extract JSON-LD metadata before removing scripts
|
|||
|
|
var jsonLd = this._disableJSONLD ? {} : this._getJSONLD(this._doc);
|
|||
|
|
|
|||
|
|
this._languageCode = this._doc.documentElement.lang
|
|||
|
|
|
|||
|
|
// Remove script tags from the document.
|
|||
|
|
this._removeScripts(this._doc);
|
|||
|
|
|
|||
|
|
this._prepDocument();
|
|||
|
|
|
|||
|
|
var metadata = this._getArticleMetadata(jsonLd);
|
|||
|
|
this._articleTitle = metadata.title;
|
|||
|
|
|
|||
|
|
var articleContent = await this._grabArticle();
|
|||
|
|
if (!articleContent)
|
|||
|
|
return null;
|
|||
|
|
|
|||
|
|
const byline = metadata.byline || this._articleByline;
|
|||
|
|
const [author, publishedDateFromAuthor] = extractPublishedDateFromAuthor(byline);
|
|||
|
|
const publishedDate = metadata.publishedDate ||
|
|||
|
|
extractPublishedDateFromUrl(this._documentURI) ||
|
|||
|
|
publishedDateFromAuthor ||
|
|||
|
|
this._articlePublishedDate;
|
|||
|
|
|
|||
|
|
this._postProcessContent(articleContent);
|
|||
|
|
|
|||
|
|
// If we haven't found an excerpt in the article's metadata, use the article's
|
|||
|
|
// first paragraph as the excerpt. This is used for displaying a preview of
|
|||
|
|
// the article's content.
|
|||
|
|
if (!metadata.excerpt) {
|
|||
|
|
var paragraphs = articleContent.getElementsByTagName("p");
|
|||
|
|
if (paragraphs.length > 0) {
|
|||
|
|
metadata.excerpt = paragraphs[0].textContent.trim();
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (!metadata.siteName) {
|
|||
|
|
// Fallback to hostname
|
|||
|
|
try {
|
|||
|
|
const host = new URL(this._baseURI).hostname;
|
|||
|
|
metadata.siteName = host.replace(/^www\./, "");
|
|||
|
|
} catch (e) {
|
|||
|
|
// Ignore
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var textContent = articleContent.textContent;
|
|||
|
|
return {
|
|||
|
|
title: this._articleTitle,
|
|||
|
|
// remove \n and extra spaces and trim the string
|
|||
|
|
byline: author ? author.replace(/\n/g, ' ').replace(/\s+/g, ' ').trim() : null,
|
|||
|
|
dir: this._articleDir,
|
|||
|
|
content: this._serializer(articleContent),
|
|||
|
|
textContent: textContent,
|
|||
|
|
length: textContent.length,
|
|||
|
|
excerpt: metadata.excerpt,
|
|||
|
|
siteName: metadata.siteName,
|
|||
|
|
siteIcon: metadata.siteIcon,
|
|||
|
|
previewImage: metadata.previewImage,
|
|||
|
|
publishedDate,
|
|||
|
|
language: this._getLanguage(metadata.locale || this._languageCode),
|
|||
|
|
};
|
|||
|
|
}
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
if (typeof module === "object") {
|
|||
|
|
module.exports = Readability;
|
|||
|
|
}
|