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This Rack middleware (rack-uri-loader.rb) is intended to serve an external Web resource as though it were local, allowing further transmogrification. If you set your rails app to serve a view as text rather than as html, render :text => "http://www.yahoo.com", :content_type => "text/plain" then this middleware assumes you are giving it a URL. The middleware fetches the URL and serves up the resource in that view of your application. (techiferous's rack-plastic, http://github.com/techiferous/rack-plastic, is a complementary middleware which you could use to facilitate further Nokogiri manipulation of the page to be rendered. It was part of the inspiration for this middleware.)