Created
April 25, 2012 15:40
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allow Facebook to access (some)content that is login-only normally
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| #app/views/layouts/facebook.html.erb | |
| <!DOCTYPE html> | |
| <html xmlns:fb="http://www.facebook.com/2008/fbml" | |
| xmlns:og="http://opengraphprotocol.org/schema/"> | |
| <head> | |
| <title><%= yield(:title) %></title> | |
| <meta charset="UTF-8"> | |
| <meta property="og:title" content="<%= yield :og_title %>"> | |
| <meta property="og:type" content="article"> | |
| <meta property="og:image" content="<%= yield :og_image %>"> | |
| <meta property="og:description" content="<%= yield :og_desc %>"> | |
| <meta property="og:url" content="<%= yield :og_url %>"> | |
| <%# <meta property="fb:admins" content=""> %> | |
| <meta property="fb:app_id" content="<%= Settings.facebook.app.id %>"> | |
| </head> | |
| <body> | |
| <%= yield %> | |
| </body> | |
| </html> | |
| # and in app/views/posts/facebook.html.erb | |
| <% content_for :title, @post.title %> | |
| <% content_for :og_title, @post.title %> | |
| <% content_for :og_image, @post.image.large.url %> | |
| <% content_for :og_desc, @post.summary %> | |
| <% content_for :og_url, post_url(@post) %> | |
| <%= @post.summary %> |
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| # app/helpers/facebook_helper | |
| module FacebookHelper | |
| def facebook_spider? | |
| /facebookexternalhit/.match(request.headers['HTTP_USER_AGENT']) ? true : false | |
| end | |
| def render_fb_or(&block) | |
| if facebook_spider? | |
| render :facebook, :layout => "facebook" | |
| # render :nothing => true, :layout => "facebook" | |
| else | |
| yield if block_given? | |
| end | |
| end | |
| end |
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| # app/controllers/posts_controller.rb | |
| class PostsController < ApplicationController | |
| include FacebookHelper | |
| before_filter :find_post | |
| before_filter :require_login | |
| def show | |
| # Use your default rendering code inside the block | |
| render_fb_or { render } | |
| end | |
| private | |
| def find_post | |
| @post = Post.find(params[:id]) | |
| end | |
| def require_login | |
| redirect_to root_url unless logged_in? | |
| end | |
| end |
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