site-metadata-extractor
Version:
web(site) resource metadata extractor
194 lines • 30.1 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.getTopNode = exports.getParsedDocForText = exports.getParsedDoc = exports.getCleanedDoc = exports.lazy = void 0;
/* eslint-disable no-unused-vars */
/* eslint-disable @typescript-eslint/no-unused-vars */
const cheerio_1 = __importDefault(require("cheerio"));
const url_1 = require("url");
const cleaner_1 = __importDefault(require("./cleaner"));
const extractor_1 = __importDefault(require("./extractor"));
const siteMetadataExtractor = (markup, resourceUrl, lang = "en") => {
const resourceUrlObj = new url_1.URL(resourceUrl);
const doc = cheerio_1.default.load(markup, { xmlMode: true });
// Separate instance with decodeEntities: false specifically for JSON-LD extraction
const docForJsonLd = cheerio_1.default.load(markup, {
xmlMode: true,
decodeEntities: false,
});
const docForText = cheerio_1.default.load(markup, { xmlMode: false });
const language = lang || extractor_1.default.lang(doc);
const pageData = {
author: extractor_1.default.author(doc),
canonicalLink: extractor_1.default.canonicalLink(doc, resourceUrl),
copyright: extractor_1.default.copyright(doc),
date: extractor_1.default.date(doc),
description: extractor_1.default.description(doc),
favicon: extractor_1.default.favicon(doc, resourceUrlObj),
image: extractor_1.default.image(doc),
jsonld: extractor_1.default.jsonld(docForJsonLd),
keywords: extractor_1.default.keywords(doc),
lang: language,
locale: extractor_1.default.locale(doc),
origin: resourceUrlObj.origin,
publisher: extractor_1.default.publisher(doc),
siteName: extractor_1.default.siteName(doc),
softTitle: extractor_1.default.softTitle(doc),
tags: extractor_1.default.tags(doc),
title: extractor_1.default.title(doc),
type: extractor_1.default.type(doc),
};
// Step 1: Clean the doc
(0, cleaner_1.default)(doc);
// Step 2: Find the doc node with the best text
const topNode = extractor_1.default.calculateBestNode(docForText, language);
// Step 3: Extract text ,videos, images, link
pageData.videos = extractor_1.default.videos(doc, topNode);
pageData.links = extractor_1.default.links(doc, topNode, language);
pageData.text = extractor_1.default.text(doc, topNode, language);
return pageData;
};
exports.default = siteMetadataExtractor;
// Allow access to document properties with lazy evaluation
const lazy = (html, resourceUrl, language = "en") => {
const resourceUrlObj = new url_1.URL(resourceUrl);
global.lazyPageData = global.lazyPageData || {};
return {
author: () => {
const doc = getParsedDoc.call(global, html);
global.lazyPageData.author = extractor_1.default.author(doc);
return global.lazyPageData.author;
},
canonicalLink: () => {
const doc = getParsedDoc.call(global, html);
global.lazyPageData.canonicalLink = extractor_1.default.canonicalLink(doc, resourceUrl);
return global.lazyPageData.canonicalLink;
},
copyright: () => {
const doc = getParsedDoc.call(global, html);
global.lazyPageData.copyright = extractor_1.default.copyright(doc);
return global.lazyPageData.copyright;
},
date: () => {
const doc = getParsedDoc.call(global, html);
global.lazyPageData.date = extractor_1.default.date(doc);
return global.lazyPageData.date;
},
description: () => {
const doc = getParsedDoc.call(global, html);
global.lazyPageData.description = extractor_1.default.description(doc);
return global.lazyPageData.description;
},
favicon: () => {
const doc = getParsedDoc.call(global, html);
global.lazyPageData.favicon = extractor_1.default.favicon(doc, resourceUrlObj);
return global.lazyPageData.favicon;
},
image: () => {
const doc = getParsedDoc.call(global, html);
global.lazyPageData.image = extractor_1.default.image(doc);
return global.lazyPageData.image;
},
jsonld: () => {
const doc = getParsedDoc.call(global, html);
global.lazyPageData.jsonld = extractor_1.default.jsonld(doc);
return global.lazyPageData.jsonld;
},
keywords: () => {
const doc = getParsedDoc.call(global, html);
global.lazyPageData.keywords = extractor_1.default.keywords(doc);
return global.lazyPageData.keywords;
},
lang: () => {
const doc = getParsedDoc.call(global, html);
global.lazyPageData.lang = language || extractor_1.default.lang(doc);
return global.lazyPageData.lang;
},
locale: () => {
const doc = getParsedDoc.call(global, html);
global.lazyPageData.locale = extractor_1.default.locale(doc);
return global.lazyPageData.locale;
},
links() {
let doc = getParsedDocForText.call(global, html);
const topNode = getTopNode.call(global, doc, this.lang());
doc = (0, cleaner_1.default)(doc);
global.lazyPageData.links = extractor_1.default.links(doc, topNode, this.lang());
return global.lazyPageData.links;
},
origin: () => {
global.lazyPageData.origin = resourceUrlObj.origin;
return global.lazyPageData.origin;
},
publisher: () => {
const doc = getParsedDoc.call(global, html);
global.lazyPageData.publisher = extractor_1.default.publisher(doc);
return global.lazyPageData.publisher;
},
siteName: () => {
const doc = getParsedDoc.call(global, html);
global.lazyPageData.siteName = extractor_1.default.siteName(doc);
return global.lazyPageData.siteName;
},
softTitle: () => {
const doc = getParsedDoc.call(global, html);
global.lazyPageData.softTitle = extractor_1.default.softTitle(doc);
return global.lazyPageData.softTitle;
},
tags: () => {
const doc = getParsedDoc.call(global, html);
global.lazyPageData.tags = extractor_1.default.tags(doc);
return global.lazyPageData.tags;
},
text() {
let doc = getParsedDocForText.call(global, html);
doc = (0, cleaner_1.default)(doc);
const topNode = getTopNode.call(global, doc, this.lang());
const textData = extractor_1.default.text(doc, topNode, this.lang());
global.lazyPageData.text = textData;
return textData;
},
title: () => {
const doc = getParsedDoc.call(global, html);
global.lazyPageData.title = extractor_1.default.title(doc);
return global.lazyPageData.title;
},
type: () => {
const doc = getParsedDoc.call(global, html);
global.lazyPageData.type = extractor_1.default.type(doc);
return global.lazyPageData.type;
},
videos() {
let doc = getParsedDocForText.call(global, html);
doc = (0, cleaner_1.default)(doc);
const topNode = getTopNode.call(global, doc, this.lang());
global.lazyPageData.videos = extractor_1.default.videos(doc, topNode);
return global.lazyPageData.videos;
},
};
};
exports.lazy = lazy;
function getCleanedDoc(html) {
if (!global.cleanedDoc) {
const doc = getParsedDoc.call(global, html);
global.cleanedDoc = (0, cleaner_1.default)(doc);
}
return global.cleanedDoc;
}
exports.getCleanedDoc = getCleanedDoc;
function getParsedDoc(html) {
return (global.doc = cheerio_1.default.load(html));
}
exports.getParsedDoc = getParsedDoc;
function getParsedDocForText(html) {
return (global.doc = cheerio_1.default.load(html, { xmlMode: false }));
}
exports.getParsedDocForText = getParsedDocForText;
function getTopNode(doc, lang) {
global.topNode = extractor_1.default.calculateBestNode(doc, lang);
return global.topNode;
}
exports.getTopNode = getTopNode;
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image: () => string;\n  jsonld: () => NewsArticle | Article | null;\n  keywords: () => string;\n  lang: () => string;\n  links: () => LinkObj[];\n  locale: () => string;\n  origin: () => string;\n  publisher: () => string;\n  siteName: () => string;\n  softTitle: () => string;\n  tags: () => string[];\n  text: () => string;\n  title: () => string;\n  type: () => string;\n  videos: () => VideoAttrs[];\n}\n\nconst siteMetadataExtractor = (\n  markup: string,\n  resourceUrl: string,\n  lang = \"en\",\n): PageData => {\n  const resourceUrlObj = new URL(resourceUrl);\n  const doc = cheerio.load(markup, { xmlMode: true });\n\n  // Separate instance with decodeEntities: false specifically for JSON-LD extraction\n  const docForJsonLd = cheerio.load(markup, {\n    xmlMode: true,\n    decodeEntities: false,\n  });\n\n  const docForText = cheerio.load(markup, { xmlMode: false });\n\n  const language = lang || extractor.lang(doc);\n\n  const pageData: PageData = {\n    author: extractor.author(doc),\n    canonicalLink: extractor.canonicalLink(doc, resourceUrl),\n    copyright: extractor.copyright(doc),\n    date: extractor.date(doc),\n    description: extractor.description(doc),\n    favicon: extractor.favicon(doc, resourceUrlObj),\n    image: extractor.image(doc),\n    jsonld: extractor.jsonld(docForJsonLd),\n    keywords: extractor.keywords(doc),\n    lang: language,\n    locale: extractor.locale(doc),\n    origin: resourceUrlObj.origin,\n    publisher: extractor.publisher(doc),\n    siteName: extractor.siteName(doc),\n    softTitle: extractor.softTitle(doc),\n    tags: extractor.tags(doc),\n    title: extractor.title(doc),\n    type: extractor.type(doc),\n  };\n\n  // Step 1: Clean the doc\n  cleaner(doc);\n\n  // Step 2: Find the doc node with the best text\n  const topNode = extractor.calculateBestNode(docForText, language);\n\n  // Step 3: Extract text ,videos, images, link\n  pageData.videos = extractor.videos(doc, topNode);\n  pageData.links = extractor.links(doc, topNode, language);\n  pageData.text = extractor.text(doc, topNode, language);\n\n  return pageData;\n};\n\nexport default siteMetadataExtractor;\n\n// Allow access to document properties with lazy evaluation\nexport const lazy = (\n  html: string,\n  resourceUrl: string,\n  language = \"en\",\n): LazyExtractor => {\n  const resourceUrlObj = new URL(resourceUrl);\n  global.lazyPageData = global.lazyPageData || {};\n\n  return {\n    author: () => {\n      const doc = getParsedDoc.call(global, html);\n      global.lazyPageData.author = extractor.author(doc);\n      return global.lazyPageData.author;\n    },\n    canonicalLink: () => {\n      const doc = getParsedDoc.call(global, html);\n      global.lazyPageData.canonicalLink = extractor.canonicalLink(\n        doc,\n        resourceUrl,\n      );\n      return global.lazyPageData.canonicalLink;\n    },\n    copyright: () => {\n      const doc = getParsedDoc.call(global, html);\n      global.lazyPageData.copyright = extractor.copyright(doc);\n      return global.lazyPageData.copyright;\n    },\n    date: () => {\n      const doc = getParsedDoc.call(global, html);\n      global.lazyPageData.date = extractor.date(doc);\n      return global.lazyPageData.date;\n    },\n    description: () => {\n      const doc = getParsedDoc.call(global, html);\n      global.lazyPageData.description = extractor.description(doc);\n      return global.lazyPageData.description;\n    },\n    favicon: () => {\n      const doc = getParsedDoc.call(global, html);\n      global.lazyPageData.favicon = extractor.favicon(doc, resourceUrlObj);\n      return global.lazyPageData.favicon;\n    },\n    image: () => {\n      const doc = getParsedDoc.call(global, html);\n      global.lazyPageData.image = extractor.image(doc);\n      return global.lazyPageData.image;\n    },\n    jsonld: () => {\n      const doc = getParsedDoc.call(global, html);\n      global.lazyPageData.jsonld = extractor.jsonld(doc);\n      return global.lazyPageData.jsonld;\n    },\n    keywords: () => {\n      const doc = getParsedDoc.call(global, html);\n      global.lazyPageData.keywords = extractor.keywords(doc);\n      return global.lazyPageData.keywords;\n    },\n    lang: () => {\n      const doc = getParsedDoc.call(global, html);\n      global.lazyPageData.lang = language || extractor.lang(doc);\n      return global.lazyPageData.lang;\n    },\n    locale: () => {\n      const doc = getParsedDoc.call(global, html);\n      global.lazyPageData.locale = extractor.locale(doc);\n      return global.lazyPageData.locale;\n    },\n    links() {\n      let doc = getParsedDocForText.call(global, html);\n      const topNode = getTopNode.call(global, doc, this.lang());\n      doc = cleaner(doc);\n      global.lazyPageData.links = extractor.links(doc, topNode, this.lang());\n      return global.lazyPageData.links;\n    },\n    origin: () => {\n      global.lazyPageData.origin = resourceUrlObj.origin;\n      return global.lazyPageData.origin;\n    },\n    publisher: () => {\n      const doc = getParsedDoc.call(global, html);\n      global.lazyPageData.publisher = extractor.publisher(doc);\n      return global.lazyPageData.publisher;\n    },\n    siteName: () => {\n      const doc = getParsedDoc.call(global, html);\n      global.lazyPageData.siteName = extractor.siteName(doc);\n      return global.lazyPageData.siteName;\n    },\n    softTitle: () => {\n      const doc = getParsedDoc.call(global, html);\n      global.lazyPageData.softTitle = extractor.softTitle(doc);\n      return global.lazyPageData.softTitle;\n    },\n    tags: () => {\n      const doc = getParsedDoc.call(global, html);\n      global.lazyPageData.tags = extractor.tags(doc);\n      return global.lazyPageData.tags;\n    },\n    text() {\n      let doc = getParsedDocForText.call(global, html);\n      doc = cleaner(doc);\n      const topNode = getTopNode.call(global, doc, this.lang());\n      const textData = extractor.text(doc, topNode, this.lang());\n      global.lazyPageData.text = textData;\n      return textData;\n    },\n    title: () => {\n      const doc = getParsedDoc.call(global, html);\n      global.lazyPageData.title = extractor.title(doc);\n      return global.lazyPageData.title;\n    },\n    type: () => {\n      const doc = getParsedDoc.call(global, html);\n      global.lazyPageData.type = extractor.type(doc);\n      return global.lazyPageData.type;\n    },\n    videos() {\n      let doc = getParsedDocForText.call(global, html);\n      doc = cleaner(doc);\n      const topNode = getTopNode.call(global, doc, this.lang());\n      global.lazyPageData.videos = extractor.videos(doc, topNode);\n      return global.lazyPageData.videos;\n    },\n  };\n};\n\nexport function getCleanedDoc(html: string): cheerio.Root {\n  if (!global.cleanedDoc) {\n    const doc = getParsedDoc.call(global, html);\n    global.cleanedDoc = cleaner(doc);\n  }\n  return global.cleanedDoc;\n}\n\nexport function getParsedDoc(html: 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