open-graph-scraper

openGraphScraper

A simple node module for scraping Open Graph and Twitter Card info off a site.

Installation

npm install open-graph-scraper

Usage

Callback Example:

const ogs = require('open-graph-scraper');
const options = { url: 'http://ogp.me/' };
ogs(options, (error, results, response) => {
  console.log('error:', error); // This is returns true or false. True if there was a error. The error it self is inside the results object.
  console.log('results:', results); // This contains all of the Open Graph results
  console.log('response:', response); // This contains the HTML of page
});

Promise Example:

const ogs = require('open-graph-scraper');
const options = { url: 'http://ogp.me/' };
ogs(options)
  .then((data) => {
    const { error, result, response } = data;
    console.log('error:', error);  // This is returns true or false. True if there was a error. The error it self is inside the results object.
    console.log('result:', result); // This contains all of the Open Graph results
    console.log('response:', response); // This contains the HTML of page
  })

Results JSON

Check the return for a success flag. If success is set to true, then the url input was valid. Otherwise it will be set to false. The above example will return something like...

{
  ogTitle: 'Open Graph protocol',
  ogType: 'website',
  ogUrl: 'http://ogp.me/',
  ogDescription: 'The Open Graph protocol enables any web page to become a rich object in a social graph.',
  ogImage: {
    url: 'http://ogp.me/logo.png',
    width: '300',
    height: '300',
    type: 'image/png'
  },
  requestUrl: 'http://ogp.me/',
  success: true
}

Options

Name	Info	Default Value	Required
url	URL of the site.		x
timeout	Timeout of the request	2000 ms
html	You can pass in an HTML string to run ogs on it. (use without options.url)
blacklist	Pass in an array of sites you don't want ogs to run on.	[]
onlyGetOpenGraphInfo	Only fetch open graph info and don't fall back on anything else.	false
ogImageFallback	Fetch other images if no open graph ones are found.	true
customMetaTags	Here you can define custom meta tags you want to scrape.	[]
allMedia	By default, OGS will only send back the first image/video it finds	false
decompress	Set the accept-encoding to gzip/deflate	true
followRedirect	Defines if redirect responses should be followed automatically.	true
maxRedirects	Max number of redirects ogs will follow.	10
retry	Number of times ogs will retry the request.	2
headers	An object containing request headers. Useful for setting the user-agent	{}
peekSize	Sets the peekSize for the request	1024

Note: open-graph-scraper uses got for requests and most of got's options should work as open-graph-scraper options.

Custom Meta Tag Example:

const ogs = require('open-graph-scraper');
const options = {
  url: 'https://github.com/jshemas/openGraphScraper',
  customMetaTags: [{
    multiple: false, // is there more then one of these tags on a page (normally this is false)
    property: 'hostname', // meta tag name/property attribute
    fieldName: 'hostnameMetaTag', // name of the result variable
  }],
};
ogs(options)
  .then((data) => {
    const { error, result, response } = data;
    console.log('hostnameMetaTag:', result.hostnameMetaTag); // hostnameMetaTag: github.com
  })

Tests

Then you can run the tests by running...

npm run test

Make

This will install the all of the dependencies, then run the tests

make test

Changelog

4.5.0

• Adding support for custom meta tags you want to scrape
• If ogs thinks the URL isn't a HTML page, it will return a 'Must scrape an HTML page' error.
• Updating Dependencies