Class: MetaInspector::Parsers::ImagesParser
- Includes:
- Enumerable
- Defined in:
- lib/meta_inspector/parsers/images.rb
Instance Method Summary collapse
-
#best ⇒ Object
Returns either the Facebook Open Graph image, twitter suggested image or the largest image in the image collection.
-
#favicon ⇒ Object
Return favicon url if exist.
- #images ⇒ Object
-
#initialize(main_parser, options = {}) ⇒ ImagesParser
constructor
A new instance of ImagesParser.
-
#largest ⇒ Object
Returns the largest image from the image collection, filtered for images that are more square than 10:1 or 1:10.
-
#owner_suggested ⇒ Object
Returns the parsed image from Facebook’s open graph property tags Most major websites now define this property and is usually relevant See doc at developers.facebook.com/docs/opengraph/ If none found, tries with Twitter image.
-
#with_size ⇒ Object
Returns an array of [img_url, width, height] sorted by image area (width * height).
Constructor Details
#initialize(main_parser, options = {}) ⇒ ImagesParser
Returns a new instance of ImagesParser.
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# File 'lib/meta_inspector/parsers/images.rb', line 11 def initialize(main_parser, = {}) @download_images = [:download_images] super(main_parser) end |
Instance Method Details
#best ⇒ Object
Returns either the Facebook Open Graph image, twitter suggested image or the largest image in the image collection
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# File 'lib/meta_inspector/parsers/images.rb', line 22 def best owner_suggested || largest end |
#favicon ⇒ Object
Return favicon url if exist
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# File 'lib/meta_inspector/parsers/images.rb', line 71 def favicon query = '//link[@rel="icon" or contains(@rel, "shortcut")]' value = parsed.xpath(query)[0].attributes['href'].value @favicon ||= URL.absolutify(value, base_url) rescue nil end |
#images ⇒ Object
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# File 'lib/meta_inspector/parsers/images.rb', line 16 def images self end |
#largest ⇒ Object
Returns the largest image from the image collection, filtered for images that are more square than 10:1 or 1:10
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# File 'lib/meta_inspector/parsers/images.rb', line 58 def largest @largest_image ||= begin imgs_with_size = with_size.dup imgs_with_size.keep_if do |url, width, height| ratio = width.to_f / height.to_f ratio > 0.1 && ratio < 10 end url, width, height = imgs_with_size.first url end end |
#owner_suggested ⇒ Object
Returns the parsed image from Facebook’s open graph property tags Most major websites now define this property and is usually relevant See doc at developers.facebook.com/docs/opengraph/ If none found, tries with Twitter image
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# File 'lib/meta_inspector/parsers/images.rb', line 30 def owner_suggested suggested_img = content_of(['og:image']) || content_of(['twitter:image']) URL.absolutify(suggested_img, base_url) if suggested_img end |
#with_size ⇒ Object
Returns an array of [img_url, width, height] sorted by image area (width * height)
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# File 'lib/meta_inspector/parsers/images.rb', line 36 def with_size @with_size ||= begin img_nodes = parsed.search('//img').select{ |img_node| img_node['src'] } imgs_with_size = img_nodes.map { |img_node| [URL.absolutify(img_node['src'], base_url), img_node['width'], img_node['height']] } imgs_with_size.uniq! { |url, width, height| url } if @download_images imgs_with_size.map! do |url, width, height| width, height = FastImage.size(url) if width.nil? || height.nil? [url, width.to_i, height.to_i] end else imgs_with_size.map! do |url, width, height| width, height = [0, 0] if width.nil? || height.nil? [url, width.to_i, height.to_i] end end imgs_with_size.sort_by { |url, width, height| -(width.to_i * height.to_i) } end end |