Atom Feeds

Replaced Instiki's RSS 2.0 feeds with Atom 1.0 feeds.

app/controllers/application.rb

@@ -145,8 +145,8 @@ class ApplicationController < ActionController::Base
   end
 
   def set_content_type_header
-    if %w(rss_with_content rss_with_headlines).include?(action_name)
-      @response.headers['Content-Type'] = 'text/xml; charset=UTF-8'
+    if %w(atom_with_content atom_with_headlines).include?(action_name)
+      @response.headers['Content-Type'] = 'application/atom+xml; charset=UTF-8'
     elsif %w(tex).include?(action_name)
       @response.headers['Content-Type'] = 'text/plain; charset=UTF-8'
     elsif @request.env['HTTP_USER_AGENT'] =~ /MathPlayer|Validator/ or @request.env.include?('HTTP_ACCEPT') &&
@@ -185,7 +185,7 @@ class ApplicationController < ActionController::Base
   end
 
   def authorization_needed?
-    not %w( login authenticate published rss_with_content rss_with_headlines ).include?(action_name)
+    not %w( login authenticate published atom_with_headlines atom_with_content).include?(action_name)
   end
 
   def authorized?

app/controllers/cache_sweeping_helper.rb

@@ -16,7 +16,9 @@ module CacheSweepingHelper
       end
     end
 
-    expire_action :controller => 'wiki', :web => web.address, :action => 'authors'
+    %w(authors atom_with_content atom_with_headlines).each do |action|
+      expire_action :controller => 'wiki', :web => web.address, :action => action
+    end
     expire_fragment :controller => 'wiki', :web => web.address, :action => %w(rss_with_headlines rss_with_content)
   end
 

app/controllers/wiki_controller.rb

@@ -8,10 +8,10 @@ require 'string_utils'
 class WikiController < ApplicationController
 
   before_filter :load_page
-  caches_action :show, :published, :authors, :tex, :s5, :print, :recently_revised, :list
+  caches_action :show, :published, :authors, :tex, :s5, :print, :recently_revised, :list, :atom_with_content, :atom_with_headlines
   cache_sweeper :revision_sweeper
 
-  layout 'default', :except => [:rss_feed, :rss_with_content, :rss_with_headlines, :tex, :pdf, :s5, :export_tex, :export_html]
+  layout 'default', :except => [:atom_with_content, :atom_with_headlines, :atom, :tex, :pdf, :s5, :export_tex, :export_html]
 
   include Sanitize
 
@@ -132,17 +132,17 @@ class WikiController < ApplicationController
     end
   end
 
-  def rss_with_content
-    if rss_with_content_allowed?
-      render_rss(hide_description = false, *parse_rss_params)
+  def atom_with_content
+    if rss_with_content_allowed? 
+      render_atom(hide_description = false)
     else
-      render_text 'RSS feed with content for this web is blocked for security reasons. ' +
+      render_text 'Atom feed with content for this web is blocked for security reasons. ' +
         'The web is password-protected and not published', '403 Forbidden'
     end
   end
 
-  def rss_with_headlines
-    render_rss(hide_description = true, *parse_rss_params)
+  def atom_with_headlines
+    render_atom(hide_description = true)
   end
 
   def search
@@ -392,18 +392,6 @@ class WikiController < ApplicationController
       @set_name = 'the web'
     end
   end
-
-  def parse_rss_params
-    if @params.include? 'limit'
-      limit = @params['limit'].to_i rescue nil
-      limit = nil if limit == 0
-    else
-      limit = 15
-    end
-    start_date = Time.local(*ParseDate::parsedate(@params['start'])) rescue nil
-    end_date = Time.local(*ParseDate::parsedate(@params['end'])) rescue nil
-    [ limit, start_date, end_date ]
-  end
   
   def remote_ip
     ip = @request.remote_ip
@@ -411,20 +399,12 @@ class WikiController < ApplicationController
     ip
   end
 
-  def render_rss(hide_description = false, limit = 15, start_date = nil, end_date = nil)
-    if limit && !start_date && !end_date
-      @pages_by_revision = @web.select.by_revision.first(limit)
-    else
-      @pages_by_revision = @web.select.by_revision
-      @pages_by_revision.reject! { |page| page.revised_at < start_date } if start_date
-      @pages_by_revision.reject! { |page| page.revised_at > end_date } if end_date
-    end
-    
+  def render_atom(hide_description = false, limit = 15)
+    @pages_by_revision = @web.select.by_revision.first(limit)
     @hide_description = hide_description
     @link_action = @web.password ? 'published' : 'show'
-    
-    render :action => 'rss_feed'
-  end
+    render :action => 'atom'
+  end 
 
   def render_tex_web
     @web.select.by_name.inject({}) do |tex_web, page|

app/views/layouts/default.rhtml

@@ -32,8 +32,8 @@
   </style>
   <%= javascript_include_tag :defaults %>
   <% if @web %>
-  	<%= auto_discovery_link_tag(:rss, :controller => 'wiki', :web => @web.address, :action => 'rss_with_headlines') %>
-  	<%= auto_discovery_link_tag(:rss, :controller => 'wiki', :web => @web.address, :action => 'rss_with_content') %>
+  	<%= auto_discovery_link_tag(:atom, :controller => 'wiki', :web => @web.address, :action => 'atom_with_headlines') %>
+  	<%= auto_discovery_link_tag(:atom, :controller => 'wiki', :web => @web.address, :action => 'atom_with_content') %>
   <% end %>
 </head>
 

app/views/wiki/atom.rxml

@@ -0,0 +1,31 @@
+xml.feed('xmlns' => "http://www.w3.org/2005/Atom", "xml:lang" => 'en') do
+  xml.title(@web.name)
+  xml.link( 'rel' => 'alternate', 'type' => "application/xhtml+xml", 'href' =>  url_for(:only_path => false, :web => @web_name, :action => @link_action, :id => 'HomePage') )
+  xml.link( 'rel' => 'self', 'href' =>  url_for(:only_path => false, :web => @web_name, :action => @hide_description? :atom_with_headlines : :atom_with_content ) )
+  xml.updated(@web.updated_at.getgm.strftime("%Y-%m-%dT%H:%M:%SZ") )
+  xml.id('tag:' + url_for(:only_path => false, :web => @web_name).split('/')[2].split(':')[0] + ',' + @web.created_at.getgm.strftime("%Y-%m-%d") + ':' + CGI.escape(@web.name)  )
+  xml.subtitle('An Instiki Wiki')
+  xml.generator('Instiki', 'uri' => "http://golem.ph.utexas.edu/instiki/show/HomePage", 'version' => Instiki::VERSION::STRING)
+
+  for page in @pages_by_revision
+    xml.entry do
+     xml.title(page.plain_name, 'type' => "html")
+      xml.link('rel' => 'alternate', 'type' => 'application/xhtml+xml', 'href' => url_for(:only_path => false, :web => @web_name, :action => @link_action, :id => page.name) )
+      xml.updated(page.updated_at.getgm.strftime("%Y-%m-%dT%H:%M:%SZ") )
+      xml.published(page.created_at.getgm.strftime("%Y-%m-%dT%H:%M:%SZ") )
+      xml.id('tag:' +url_for(:only_path => false, :web => @web_name).split('/')[2].split(':')[0]  + ',' + page.created_at.getgm.strftime("%Y-%m-%d") + ":"  + @web.name + ',' + CGI.escape(page.name)) 
+      xml.author do
+        xml.name(page.author)
+      end
+      if @hide_description
+        xml.summary('Content suppressed.', 'type' => 'text')
+      else
+        xml.content('type' => 'xhtml', 'xml:base' => url_for(:only_path => false, :web => @web_name, :action => @link_action, :id => page.name) ) do
+          xml.div('xmlns' => 'http://www.w3.org/1999/xhtml' ) do
+            |x| x << rendered_content(page)
+          end
+        end
+      end
+    end
+  end
+end

app/views/wiki/feeds.rhtml

@@ -1,14 +1,14 @@
 <% @title = "Feeds" %>
 
-<p>You can subscribe to this wiki by RSS and get either just the headlines of the pages that change or the entire page.</p> 
+<p>You can subscribe to this wiki's Atom feed and get either just the headlines of the pages that change or the entire page.</p> 
 
 <ul id="feedsList">
   <li>
     <% if @rss_with_content_allowed %>
-      <%= link_to 'Full content (RSS 2.0)', :web => @web.address, :action => :rss_with_content %>
+      <%= link_to 'Full content (Atom 1.0)', :web => @web.address, :action => :atom_with_content %>
     <% end %>
   </li>
   <li>
-    <%= link_to 'Headlines (RSS 2.0)', :web => @web.address, :action => :rss_with_headlines %>
+    <%= link_to 'Headlines (Atom 1.0)', :web => @web.address, :action => :atom_with_headlines %>
   </li>
 </ul>