oembed for jekyll

README.md

modified version of https://gist.github.com/vanto/1455726 so go there for the full readme

modifications

• add filter to be able to neatly know if a URL is embeddable
• a bit of logging for debug
• swallow error
• hacky insta iframe embed fallback don't @ me that it's not oembed :D

Use:

	  {% if embeddable %} {% oembed {{page.your_fun_page_url_attribute_here}} %} {% endif%}

or (note no quotes!!)

	  {% oembed https://www.instagram.com/p/B_-zo6sJpFG/ %}

oembed.rb

##
# OEmbed Liquid Tag for Jekyll
#   - requires https://github.com/judofyr/ruby-oembed/
#
# Copyright 2011 Tammo van Lessen
# 
#    Licensed under the Apache License, Version 2.0 (the "License");
#    you may not use this file except in compliance with the License.
#    You may obtain a copy of the License at
# 
#        http://www.apache.org/licenses/LICENSE-2.0
# 
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS,
#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#    See the License for the specific language governing permissions and
#    limitations under the License.
##
require 'oembed'
require 'uri'

# register all default OEmbed providers
::OEmbed::Providers.register_all()
# since register_all does not register all default providers, we need to do this here. See https://github.com/judofyr/ruby-oembed/issues/18
::OEmbed::Providers.register(::OEmbed::Providers::Slideshare, ::OEmbed::Providers::Yfrog, ::OEmbed::Providers::MlgTv)
::OEmbed::Providers.register_fallback(::OEmbed::ProviderDiscovery, ::OEmbed::Providers::Embedly, ::OEmbed::Providers::OohEmbed)
INSTA_EXP = /^https?:\/\/((m\.)|(www\.))?instagram.com\/p\/([^\/]+)\/.*/

module Jekyll
  class OEmbed < Liquid::Tag

    def initialize(tag_name, markup, tokens)
       super
       # parse optional max. width/height parameters
       @text, @embed_w, @embed_h = markup.split
       @embed_w ||= 500
       @text.strip!
    end
    
    def render(context)
      # pipe param through liquid to make additional replacements possible
      url = Liquid::Template.parse(@text).render context
      
      m = INSTA_EXP.match(url)
      return "<iframe src=\"https://www.instagram.com/p/#{m[4]}/embed\" width=\"500\" height=\"590\" frameborder=\"0\" scrolling=\"no\" allowtransparency=\"true\"></iframe>" if INSTA_EXP.match?(url)
      # oembed look up
      # additionally add max. width/height parameters
      begin
      result = ::OEmbed::Providers.get(url, { :format => :json, :maxwidth => @embed_w, :maxheight => @embed_h })
      rescue => e
	      Jekyll.logger.debug("Oembed issue with #{url}: #{e.inspect}")
	      return ""
      end
      
      # Odd: slideshare uses provider-name instead of provider_name
      provider = result.fields['provider_name'] || result.fields['provider-name'] || 'unknown'

      "<div class=\"embed #{result.type} #{provider}\">#{result.html}</div>"
    end
  end
  
  module OEmbeddable
    def oembeddable(input)
      # pipe param through liquid to make additional replacements possible
      url = Liquid::Template.parse(input.strip).render @context
      
      # oembed look up
      return true if INSTA_EXP.match?(url)
      begin
        result = ::OEmbed::Providers.get(url, {:format => :json})
      rescue ::OEmbed::Error => e
	      Jekyll.logger.debug("#{url} not embeddable: #{e.inspect}")
        return false
      else
        return true
      end
    end
  end
    
end

Liquid::Template.register_tag('oembed', Jekyll::OEmbed)
Liquid::Template.register_filter(Jekyll::OEmbeddable)