gist: 113533


  
    
      Ruby
    
    
      
      
        embed
        
      
      
      
      raw
    
  
  
  
    
      
        
          
            
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              module Rack
  class Embiggener
    def initialize(app)
      @app = app
    end
    
    def call(env)
      status, headers, body = @app.call(env)
      headers.delete('Content-Length')
    
      response = Rack::Response.new(
        Rack::Embiggener.embiggen_urls(body),
        status,
        headers
      )
    
      response.finish
      return response.to_a
    end
        
    def self.embiggen_urls(original_body)
      new_body = []
      
      original_body.each { |line|
        tinys = line.scan(/(http:\/\/(?:www\.)?tinyurl\.com\/(.{6}))/)
        new_body << tinys.uniq.inject(line) do |body, tiny|
          original_tiny = tiny[0]
          preview_url = "http://preview.tinyurl.com/#{tiny[1]}"
          response = Net::HTTP.get_response(URI.parse(preview_url))
          embiggened_url = response.body.match(/redirecturl" href="(.*)">/)[1]
          body.gsub(original_tiny, embiggened_url)
        end
      }
      
      new_body
    end
  end 
end