Sinatra app wrapping QC library call to reorder test in a test_set. (Using Slim and streaming)

app.rb

require 'sinatra'
require 'slim'
require './reorder_tests_in_test_lab'
require 'pit'

set :bind, '0.0.0.0' 
set :slim, :pretty => true

@@config = Pit.get("qc", :require => {
    "username" => "qc_user",
    "password" => "qc_password",
    "url" => "qc_url"
  })

class StreamOutput
  def initialize(stream)
    @stream = stream
  end
  def puts(*strings)
    strings.each{|s| @stream << s.chomp + "\n" }
  end
end

def run(project, id_or_range, output)
  @settings = Settings.new( @@config["url"], @@config["username"], @@config["password"], project)
  re_order_tests( @settings, id_or_range, output)
end

get "/" do
  slim :index
end

get "/reorder" do
  slim :index
end

post "/reorder" do
  @project = params["project"]
  @id_or_range = params["id_or_range"]
  @output_log = "[OUTPUT]"

  before, after =  slim(:index).split(@output_log)

  stream do |out|
    out << before
    run(@project, @id_or_range, StreamOutput.new(out))
    out << after
  end
end

__END__

@@layout
doctype html
html
  head
    title Reorder QC TestSets
    meta charset="utf-8"
    style
      | label { display: inline-block; width: 210px; text-align: right; }
  body
    header
      h1.title Reorder QC TestSets
      
    == yield
    
    footer
      small
        | Copyright &copy; #{Time.now.year} Nigel Thorne

@@index
div#result
  pre
    == @output_log
br
br
form[ action="/reorder" method="post" ]
  label Project:
  input[  type='text' 
          name="project"
          value=@project ]
  br
  
  label ID or Range (xxx-yyy):
  input[  type='text' 
          name="id_or_range"
          value=@id_or_range ]
  br
  
  label
  input[  type='submit' 
          value="Go!"]