Hypermicrodata

Ruby library for extracting HTML5 Microdata with Hypermedia and converting them into various JSON format.

Story (from original 'microdata' gem)

Most of the code here was extracted from Mida by Lawrence Woodman. This was done in order to have a simpler, more generic Microdata parser without all the vocabulary awareness and other features. This gem is also tested under Ruby 1.9.3 and Ruby 2.0.0, though it could be better tested.

Installation

Add this line to your application's Gemfile:

gem 'hypermicrodata'

And then execute:

$ bundle

Or install it yourself as:

$ gem install hypermicrodata

Usage

Basic

json = Hypermicrodata::Extract.new(html).to_json(:uber)

Supported formats are

application/vnd.amundsen-uber+json (:uber)
application/hal+json (:hal)
application/json (:plain)

Rails Integration

When you use this in Rails, you don't need to extract data manually.

/config/mime_types.rb

Mime::Type.register 'application/vnd.amundsen-uber+json', :uberjson
# or if you want HAL
Mime::Type.register 'application/hal+json', :haljson

/app/controllers/people_controller.rb

class PeopleController < ApplicationController
  include Hypermicrodata::Rails::HtmlBasedJsonRenderer
  ...
end

/app/views/people/show.html.haml

%main.person{itemscope: true, itemtype: 'http://schema.org/Person', itemid: person_url(@person)}
  .media
    .media-image.pull-left
      = image_tag @person.picture_path, alt: '', itemprop: 'image'
    .media-body
      %h1.media-heading
        %span{itemprop: 'name'}= @person.name
  = link_to 'collection', people_path, rel: 'collection', itemprop: 'isPartOf'

<main> elements is considered root nodes of the extraction into JSON.

If you don't want use <main>, you can use elements with data-main-item attribute instead.

And you can serve following JSON:

GET /people/1 HTTP/1.1
Host: www.example.com
Accept: application/vnd.amundsen-uber+json

{
  "uber": {
    "version": "1.0",
    "data": [{
      "url": "http://www.example.com/people/1",
      "name": "Person",
      "data": [
        { "name": "image", "value": "/assets/bob.png" },
        { "name": "name", "value": "Bob Smith" },
        { "name": "isPartOf", "rel": "collection", "url": "/people" },
      ]
    }]
  }
}

Contributing

Fork it
Create your feature branch (git checkout -b my-new-feature)
Commit your changes (git commit -am 'Add some feature')
Push to the branch (git push origin my-new-feature)
Create new Pull Request