site-metadata-extractor
Version:
web(site) resource metadata extractor
270 lines • 34.4 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.sanitizeJsonLdString = void 0;
const cheerio_1 = __importDefault(require("cheerio"));
function cleanArticleTags(doc) {
const articles = doc("article");
articles.each((_index, element) => {
doc(element).removeAttr("id");
doc(element).removeAttr("name");
doc(element).removeAttr("class");
});
return doc;
}
function cleanBadTags(doc) {
const removeNodesRe = "^side$|combx|retweet|mediaarticlerelated|menucontainer|navbar|partner-gravity-ad|video-full-transcript|storytopbar-bucket|utility-bar|inline-share-tools|comment|PopularQuestions|contact|foot|footer|Footer|footnote|cnn_strycaptiontxt|cnn_html_slideshow|cnn_strylftcntnt|links|meta$|shoutbox|sponsor|tags|socialnetworking|socialNetworking|cnnStryHghLght|cnn_stryspcvbx|^inset$|pagetools|post-attributes|welcome_form|contentTools2|the_answers|communitypromo|runaroundLeft|subscribe|vcard|articleheadings|date|^print$|popup|author-dropdown|tools|socialtools|byline|konafilter|KonaFilter|breadcrumbs|^fn$|wp-caption-text|legende|ajoutVideo|timestamp|js_replies";
const regex = new RegExp(removeNodesRe, "i");
const toRemove = doc("*").filter((_index, el) => {
const idEl = doc(el).attr("id");
const classEl = doc(el).attr("class");
const nameEl = doc(el).attr("name");
if (idEl) {
return idEl.match(regex) !== null;
}
else if (classEl) {
return classEl.match(regex) !== null;
}
else if (nameEl) {
return nameEl.match(regex) !== null;
}
return false;
});
doc(toRemove).remove();
return doc;
}
function cleanCodeBlocks(doc) {
const nodes = doc("[class*='highlight-'], pre code, code, pre, ul.task-list");
nodes.each((_index, element) => {
doc(element).replaceWith(doc(element).text());
});
return doc;
}
function cleanEmTags(doc) {
const ems = doc("em");
ems.each((_index, element) => {
const images = ems.find("img");
if (images.length === 0) {
const htmlEl = doc(element).html();
if (htmlEl) {
doc(element).replaceWith(htmlEl);
}
}
});
return doc;
}
function cleanErrantLineBreaks(doc) {
doc("p").each((_index, element) => {
const node = doc(element);
const contents = node.contents();
doc(contents).each((_cindex, cElement) => {
const contentsNode = doc(cElement);
if (contentsNode && contentsNode[0] && contentsNode[0].type === "text") {
contentsNode.replaceWith(contentsNode.text().replace(/([^\n])\n([^\n])/g, "$1 $2"));
}
});
});
return doc;
}
function cleanParaSpans(doc) {
const nodes = doc("p span");
nodes.each((_index, element) => {
const htmlEl = doc(element).html();
if (htmlEl) {
doc(element).replaceWith(htmlEl);
}
});
return doc;
}
function cleanUnderlines(doc) {
const nodes = doc("u");
nodes.each((_index, element) => {
const htmlEl = doc(element).html();
if (htmlEl) {
doc(element).replaceWith(htmlEl);
}
});
return doc;
}
function divToPara(doc, domType) {
const divs = doc(domType);
const tags = [
"a",
"blockquote",
"dl",
"div",
"img",
"ol",
"p",
"pre",
"table",
"ul",
];
divs.each((_index, element) => {
const div = doc(element);
const items = div.find(tags.join(", "));
if (items.length === 0) {
replaceWithPara(doc, element);
}
else {
const replaceNodes = getReplacementNodes(doc, div);
let html = "";
replaceNodes.forEach((node) => {
if (node.text() !== "") {
html += `<p>${node}</p>`;
}
});
div.empty();
doc(div).replaceWith(`${html}`);
}
});
return doc;
}
function getReplacementNodes(doc, div) {
let replacementText = [];
const nodesToReturn = [];
const nodesToRemove = [];
const children = div.contents();
children.each((_index, element) => {
const child = doc(element);
if (child.get(0) &&
child.get(0).tagName === "p" &&
replacementText.length > 0) {
const text = replacementText.join("");
const textNodeLoad = cheerio_1.default.load(`<p>${text}</p>`);
const textNode = doc(textNodeLoad);
// create a node out of text and push
nodesToReturn.push(textNode);
replacementText = [];
const childEl = doc(element);
if (childEl) {
nodesToReturn.push(childEl);
}
}
else if (child.get(0) && child.get(0).type === "text") {
const childTextNode = child;
const childText = child.text();
const replaceText = childText
.replace(/\n/g, "\n\n")
.replace(/\t/g, "")
.replace(/^\s+$/g, "");
if (replaceText.length > 1) {
let previousSiblingNode = childTextNode.prev();
while (previousSiblingNode.get(0) &&
previousSiblingNode.get(0).tagName === "a" &&
previousSiblingNode.attr("grv-usedalready") !== "yes") {
const outer = " " + doc.html(previousSiblingNode) + " ";
replacementText.push(outer);
nodesToRemove.push(previousSiblingNode);
previousSiblingNode.attr("grv-usedalready", "yes");
previousSiblingNode = previousSiblingNode.prev();
}
replacementText.push(replaceText);
const nextSiblingNode = childTextNode.next();
while (nextSiblingNode.get(0) &&
nextSiblingNode.get(0).tagName === "a" &&
nextSiblingNode.attr("grv-usedalready") !== "yes") {
const outer = " " + doc.html(nextSiblingNode) + " ";
replacementText.push(outer);
nodesToRemove.push(nextSiblingNode);
nextSiblingNode.attr("grv-usedalready", "yes");
previousSiblingNode = nextSiblingNode.next();
}
}
// otherwise
}
else {
const childEl = doc(child);
if (childEl) {
nodesToReturn.push(childEl);
}
}
});
// flush out anything still remaining
if (replacementText.length > 0) {
const text = replacementText.join("");
const textNodeLoad = cheerio_1.default.load(`<p>${text}</p>`);
const textNode = doc(textNodeLoad);
nodesToReturn.push(textNode);
replacementText = [];
}
nodesToRemove.forEach((node) => {
doc(node).remove();
});
return nodesToReturn;
}
function removeBodyClasses(doc) {
doc("body").removeClass();
return doc;
}
function removeDropCaps(doc) {
const nodes = doc("span[class~=dropcap], span[class~=drop_cap]");
nodes.each((_index, element) => {
const htmlEl = doc(element).html();
if (htmlEl) {
doc(element).replaceWith(htmlEl);
}
});
return doc;
}
function removeNodesRegex(doc, pattern) {
const toRemove = doc("div").filter((_index, element) => {
const idEl = doc(element).attr("id");
const classEl = doc(element).attr("class");
if (idEl) {
return idEl.match(pattern) !== null;
}
else if (classEl) {
return classEl.match(pattern) !== null;
}
return false;
});
doc(toRemove).remove();
return doc;
}
function removeScriptsStyles(doc) {
doc("script").remove();
doc("style").remove();
const comments = doc("*")
.contents()
.filter((_index, element) => {
return element.type === "comment";
});
return doc(comments).remove();
}
function replaceWithPara(doc, div) {
const divContent = doc(div).html();
doc(div).replaceWith(`<p>${divContent}</p>`);
return doc;
}
const cleaner = (doc) => {
removeBodyClasses(doc);
cleanArticleTags(doc);
cleanEmTags(doc);
cleanCodeBlocks(doc);
removeDropCaps(doc);
removeScriptsStyles(doc);
cleanBadTags(doc);
removeNodesRegex(doc, /^caption$/);
removeNodesRegex(doc, / google /);
removeNodesRegex(doc, /^[^entry-]more.*$/);
removeNodesRegex(doc, /[^-]facebook/);
removeNodesRegex(doc, /facebook-broadcasting/);
removeNodesRegex(doc, /[^-]twitter/);
cleanParaSpans(doc);
cleanUnderlines(doc);
cleanErrantLineBreaks(doc);
divToPara(doc, "div");
divToPara(doc, "span");
return doc;
};
// Sanitization function to remove HTML/XML tags
const sanitizeJsonLdString = (jsonLdString) => {
// Remove anything that looks like an HTML/XML tag (this is a basic example, might need adjustments)
return jsonLdString.replace(/<\/?[^>]+(>|$)/g, "").trim();
};
exports.sanitizeJsonLdString = sanitizeJsonLdString;
exports.default = cleaner;
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node.contents();\n\n    doc(contents).each((_cindex: number, cElement: cheerio.Element) => {\n      const contentsNode = doc(cElement);\n      if (contentsNode && contentsNode[0] && contentsNode[0].type === \"text\") {\n        contentsNode.replaceWith(\n          contentsNode.text().replace(/([^\\n])\\n([^\\n])/g, \"$1 $2\"),\n        );\n      }\n    });\n  });\n  return doc;\n}\n\nfunction cleanParaSpans(doc: cheerio.Root) {\n  const nodes = doc(\"p span\");\n  nodes.each((_index: number, element: cheerio.Element) => {\n    const htmlEl = doc(element).html();\n    if (htmlEl) {\n      doc(element).replaceWith(htmlEl);\n    }\n  });\n  return doc;\n}\n\nfunction cleanUnderlines(doc: cheerio.Root) {\n  const nodes = doc(\"u\");\n  nodes.each((_index: number, element: cheerio.Element) => {\n    const htmlEl = doc(element).html();\n    if (htmlEl) {\n      doc(element).replaceWith(htmlEl);\n    }\n  });\n  return doc;\n}\n\nfunction divToPara(doc: cheerio.Root, domType: string) {\n  const divs = doc(domType);\n\n  const tags = [\n    \"a\",\n    \"blockquote\",\n    \"dl\",\n    \"div\",\n    \"img\",\n    \"ol\",\n    \"p\",\n    \"pre\",\n    \"table\",\n    \"ul\",\n  ];\n\n  divs.each((_index: number, element: cheerio.Element) => {\n    const div = doc(element);\n    const items = div.find(tags.join(\", \"));\n\n    if (items.length === 0) {\n      replaceWithPara(doc, element);\n    } else {\n      const replaceNodes = getReplacementNodes(doc, div);\n\n      let html = \"\";\n      replaceNodes.forEach((node) => {\n        if (node.text() !== \"\") {\n          html += `<p>${node}</p>`;\n        }\n      });\n\n      div.empty();\n      doc(div).replaceWith(`${html}`);\n    }\n  });\n  return doc;\n}\n\nfunction getReplacementNodes(\n  doc: cheerio.Root,\n  div: cheerio.Cheerio,\n): cheerio.Cheerio[] {\n  let replacementText: string[] = [];\n  const nodesToReturn: cheerio.Cheerio[] = [];\n  const nodesToRemove: cheerio.Cheerio[] = [];\n  const children = div.contents();\n\n  children.each((_index: number, element) => {\n    const child = doc(element);\n\n    if (\n      child.get(0) &&\n      child.get(0).tagName === \"p\" &&\n      replacementText.length > 0\n    ) {\n      const text = replacementText.join(\"\");\n      const textNodeLoad = cheerio.load(`<p>${text}</p>`);\n      const textNode = doc(textNodeLoad);\n      // create a node out of text and push\n      nodesToReturn.push(textNode);\n      replacementText = [];\n      const childEl = doc(element);\n      if (childEl) {\n        nodesToReturn.push(childEl);\n      }\n    } else if (child.get(0) && child.get(0).type === \"text\") {\n      const childTextNode = child;\n      const childText = child.text();\n      const replaceText = childText\n        .replace(/\\n/g, \"\\n\\n\")\n        .replace(/\\t/g, \"\")\n        .replace(/^\\s+$/g, \"\");\n\n      if (replaceText.length > 1) {\n        let previousSiblingNode = childTextNode.prev();\n\n        while (\n          previousSiblingNode.get(0) &&\n          previousSiblingNode.get(0).tagName === \"a\" &&\n          previousSiblingNode.attr(\"grv-usedalready\") !== \"yes\"\n        ) {\n          const outer = \" \" + doc.html(previousSiblingNode) + \" \";\n          replacementText.push(outer);\n          nodesToRemove.push(previousSiblingNode);\n          previousSiblingNode.attr(\"grv-usedalready\", \"yes\");\n          previousSiblingNode = previousSiblingNode.prev();\n        }\n\n        replacementText.push(replaceText);\n        const nextSiblingNode = childTextNode.next();\n\n        while (\n          nextSiblingNode.get(0) &&\n          nextSiblingNode.get(0).tagName === \"a\" &&\n          nextSiblingNode.attr(\"grv-usedalready\") !== \"yes\"\n        ) {\n          const outer = \" \" + doc.html(nextSiblingNode) + \" \";\n          replacementText.push(outer);\n          nodesToRemove.push(nextSiblingNode);\n          nextSiblingNode.attr(\"grv-usedalready\", \"yes\");\n          previousSiblingNode = nextSiblingNode.next();\n        }\n      }\n      // otherwise\n    } else {\n      const childEl = doc(child);\n      if (childEl) {\n        nodesToReturn.push(childEl);\n      }\n    }\n  });\n\n  // flush out anything still remaining\n  if (replacementText.length > 0) {\n    const text = replacementText.join(\"\");\n    const textNodeLoad = cheerio.load(`<p>${text}</p>`);\n    const textNode = doc(textNodeLoad);\n    nodesToReturn.push(textNode);\n    replacementText = [];\n  }\n\n  nodesToRemove.forEach((node: cheerio.Cheerio) => {\n    doc(node).remove();\n  });\n\n  return nodesToReturn;\n}\n\nfunction removeBodyClasses(doc: cheerio.Root): cheerio.Root {\n  doc(\"body\").removeClass();\n  return doc;\n}\n\nfunction removeDropCaps(doc: cheerio.Root): cheerio.Root {\n  const nodes = doc(\"span[class~=dropcap], span[class~=drop_cap]\");\n  nodes.each((_index: number, element: cheerio.Element) => {\n    const htmlEl = doc(element).html();\n    if (htmlEl) {\n      doc(element).replaceWith(htmlEl);\n    }\n  });\n  return doc;\n}\n\nfunction removeNodesRegex(doc: cheerio.Root, pattern: RegExp) {\n  const toRemove = doc(\"div\").filter((_index, element) => {\n    const idEl = doc(element).attr(\"id\");\n    const classEl = doc(element).attr(\"class\");\n    if (idEl) {\n      return idEl.match(pattern) !== null;\n    } else if (classEl) {\n      return classEl.match(pattern) !== null;\n    }\n    return false;\n  });\n  doc(toRemove).remove();\n  return doc;\n}\n\nfunction removeScriptsStyles(doc: cheerio.Root): cheerio.Cheerio {\n  doc(\"script\").remove();\n  doc(\"style\").remove();\n\n  const comments = doc(\"*\")\n    .contents()\n    .filter((_index: number, element: cheerio.Element) => {\n      return element.type === \"comment\";\n    });\n\n  return doc(comments).remove();\n}\n\nfunction replaceWithPara(\n  doc: cheerio.Root,\n  div: cheerio.Element,\n): cheerio.Root {\n  const divContent = doc(div).html();\n  doc(div).replaceWith(`<p>${divContent}</p>`);\n  return doc;\n}\n\nconst cleaner = (doc: cheerio.Root): cheerio.Root => {\n  removeBodyClasses(doc);\n  cleanArticleTags(doc);\n  cleanEmTags(doc);\n  cleanCodeBlocks(doc);\n  removeDropCaps(doc);\n  removeScriptsStyles(doc);\n  cleanBadTags(doc);\n  removeNodesRegex(doc, /^caption$/);\n  removeNodesRegex(doc, / google /);\n  removeNodesRegex(doc, /^[^entry-]more.*$/);\n  removeNodesRegex(doc, /[^-]facebook/);\n  removeNodesRegex(doc, /facebook-broadcasting/);\n  removeNodesRegex(doc, /[^-]twitter/);\n  cleanParaSpans(doc);\n  cleanUnderlines(doc);\n  cleanErrantLineBreaks(doc);\n  divToPara(doc, \"div\");\n  divToPara(doc, \"span\");\n  return doc;\n};\n\n// Sanitization function to remove HTML/XML tags\nexport const sanitizeJsonLdString = (jsonLdString: string): string => {\n  // Remove anything that looks like an HTML/XML tag (this is a basic example, might need adjustments)\n  return jsonLdString.replace(/<\\/?[^>]+(>|$)/g, \"\").trim();\n};\n\nexport default cleaner;\n"]}