Rack middleware to take all of the server output and condense it down to a single line of html source.

join_html_output.rb

module Rack
  class JoinHtmlOutput

    def initialize(app)
      @app = app
    end

    def call(env)
      # get the original repsonse
      status, headers, response = @app.call(env)
      
      # response could be an empty array, like for a 304 not-modified or a chunked response
      # Modify response chunks
      response.each do |chunk| 
        chunk.gsub!(/[\r\n]+/, '').gsub!(/>\s+/, '>').gsub!(/\s+</, '<')
      end
      
      # return the modified server response
      [status, headers, response]
    end

  end
end