site-metadata-extractor's Introduction

Site Metadata Extractor

Cleans and extracts a web(site) resource's metadata.

Metadata extraction fields currently supported:

Name	Data Type
author	array (jsonb)
canonical_url	string
copyright	string
date (publish date)	date
description	text
favicon	text
image (primary/og image)	text
jsonld (structured data)	object (jsonb)
keywords	array (jsonb)
lang	string
locale	string
origin	string
publisher	string
site_name	string
tags	array (jsonb)
title	string
type	string
truncated_text	text
status	string
videos	array (jsonb)
links	array (jsonb)

Install

NPM:

$ npm install site-metadata-extractor --save

Yarn:

$ yarn add site-metadata-extractor

Usage

Feed in a raw markup from a webpage to get extracted metadata fields.

From .html file:

import fs from "fs";
import siteMetadataExtractor from "site-metadata-extractor";

const getMetadataFromFile = (filename) => {
  const filepath = path.resolve(__dirname, `../data/${filename}.html`);
  const markup = fs.readFileSync(filepath).toString();
  // feel free to use localhost as the second parameter for testing
  const metadata = siteMetadataExtractor(markup, "YOUR_SITE_ORIGIN_HERE");
  return metadata;
};

getMetadataFromFile("example");

From a server request:

import axios from 'axios';
import siteMetadataExtractor from 'site-metadata-extractor';

const processSite = async (url) => {
  return axios.get(url, config = {})
    .then(res => {
      const { headers } = res;
      const contentType = headers['content-type'];
      if (contentType.includes('text/html')) {
        return {
          body: res.data,
          url
        };
      } else {
        return {};
      }
    })
    .catch(err => {
      console.log(err);
    });
};

processSite('https://www.cnbc.com/guide/personal-finance-101-the-complete-guide-to-managing-your-money/`)
	.then((data) => {
		...
    siteMetadataExtractor(data, "https://www.cnbc.com/guide/personal-finance-101-the-complete-guide-to-managing-your-money/", "en");
    ...
	});

Development

Run: git clone https://github.com/sc10ntech/site-metadata-extractor.git
Change into project directory and install deps: cd site-metadata-extractor && npm i