# Crawlable

Super DRY Sitemaps for Rails and Sinatra Apps (works on Heroku!)

## Usage

### Install

    sudo gem install crawlable
    
### Sitemap (`config/sitemap.rb`)

    Sitemap "http://www.example.com" do
      link articles_path, :priority => 0.7, :changes => 'daily'
      
      Post.all.each do |a|
        link articles_path(a), :updated_at => a.updated_at do
          image images_path(a.featured_image)
        end
      end
    end
    
#### Result

    <?xml version="1.0"?>
    <urlset>
      <url>
        <loc>/articles</loc>
        <lastmod>2010-06-20T09:38:26+00:00</lastmod>
        <changefreq>daily</changefreq>
        <priority>0.7</priority>
      </url>
      <url>
        <loc>/articles/title-0</loc>
        <lastmod>2010-06-20T09:38:26+00:00</lastmod>
        <changefreq>weekly</changefreq>
        <priority>0.5</priority>
      </url>
      <url>
        <loc>/articles/title-1</loc>
        <lastmod>2010-06-20T09:38:26+00:00</lastmod>
        <changefreq>weekly</changefreq>
        <priority>0.5</priority>
      </url>
      ...
    </urlset>
    
### Feed

    Feed do
      title "My RSS Feed"
      author "Lance Pollard"
      description "Something nice and tidy"
      
      Post.all.each do |a|
        entry "/posts/#{a.to_param}", :updated_at => a.updated_at, :title => a.title
      end
    end

## Features

- Works on Heroku
- Pings Google, Bing, Yahoo!, and Ask whenever anything changes

## Alternatives

- [SitemapGenerator](http://github.com/kjvarga/sitemap_generator)
- [Sitemap](http://github.com/queso/sitemap)
- [BigSitemap](http://github.com/alexrabarts/big_sitemap)
- [Sitemap (diff than above)](http://github.com/flyerhzm/sitemap)
- [SitemapGenerator (diff than above)](http://github.com/christianhellsten/sitemap-generator)
- [Sitemapper](http://github.com/milk-it/sitemapper)

## Resources

- [Official Sitemap Protocol](http://sitemaps.org/protocol.php)
- [Official RSS Feed Spec](http://cyber.law.harvard.edu/rss/rss.html)
- [Sitemap Engine List](http://en.wikipedia.org/wiki/Sitemap_index)
- [Yahoo Site Explorer](http://developer.yahoo.com/search/siteexplorer/V1/updateNotification.html)
- [Comparison of Feed Aggregators](http://en.wikipedia.org/wiki/Comparison_of_feed_aggregators)