imgseeker

imgseeker

Finding an image for a given URL. imgseeker uses OpenGraph og:image as a fallback if no config for the hostname is given and og:image exists.

Getting Started

Install the module with: npm install imgseeker

var imgseeker = require('imgseeker');
imgseeker.init({});
imgseeker.seek('http://www.some-domain.com/some/path/index.html', function (err, imgUrl)) {
  // do something with imgUrl
});

Documentation

Options reference

• defaultImg: Boolean, indicates if at least the first img on the page should be returned (Default true)
• request: Object, all properties from mikeal's request module can be used

setting the global config

IMPORTANT: You need to call the init-method () before seeking in an URL. The init-method itself is chainable so you can call imgseeker.init().seek(…

if no config for a hostname is given, imgseeker tries to fetch OpenGraphs og:image, if there is no og:image it tries to fetch the first image of the page (if defaultImg is set to true)

config-values for 1 host can be provided as String or Array. If they are given as an Array, imgseeker loops over the array, and returns the first element with a working selector (tries to get src-property and if not found a background image). if you do not want the first image, specify a zero-based index separated with a pipe in your selector (e.g. '.your-selector|1' would return the second image found for this selector)

var imgseeker = require('imgseeker');
imgseeker.init(); // setting the global config

seek for a img-url from a page

imgseeker.seek('some-url', function (err, imgUrl) {
  // do something with imgUrl
});

seek for a img-url from a page and define a custom selector (override global config)

imgseeker.seek('some-url', {'some-url': ['.img-class']}function (err, imgUrl) {
  // do something with imgUrl
});

Examples

// init and seek with global config (including some request-config)
var imgseeker = require('imgseeker');
imgseeker.init({
  request: {
    maxConnections: 50,
    followAllRedirects: true,
    encoding: 'utf-8'
  },
  'www.some-domain.com': ['.some-class > img', '.another-class > img'],
  'another-domain.com': ['img']
}).seek('http://www.some-domain.com/some/path/index.html', function (err, imgUrl) {
  // do something with imgUrl
});

// seek with special config (which overrides global config)
var specialConfig = {
  'www.some-domain.com': ['.some-special-selector']
};
imgseeker.seek('http://www.some-domain.com/some/path/index.html', specialConfig, function (err, imgUrl)) {
  // do something with imgUrl
});

// seek for image 2 which was found for this selector
var specialConfig = {
  'www.some-domain.com': ['.some-special-selector|2']
};
imgseeker.seek('http://www.some-domain.com/some/path/index.html', specialConfig, function (err, imgUrl)) {
  // do something with imgUrl
});

Contributing

In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code using Grunt.

Release History

• 0.3.2

  • use background-image if obj has not a src-property
  • add possibility to add index of image to be returned

• 0.3.1

  • bugfix og:images -> og:image

• 0.3.0

  • make all request properties available

• 0.2.1

  • make request timeout settable

• 0.2.0

  • domain-configs as arrays (existing string configs will still work)

• 0.1.1

  • resolve img-urls to absolute urls

• 0.1.0

  • Initial Commit

Contributors

• Bastian "hereandnow" Behrens

License

Copyright (c) 2013 Valiton GmbH Licensed under the MIT license.