codefest - sample rack app

gistfile1.txt

require 'rubygems'
require 'json'


require 'rack'
require 'rinruby'

class HelloApp
  def call(env)
    req = Rack::Request.new(env)
    #text = JSON.pretty_generate(JSON.parse(req.params.to_json))
    #[200,{"Content-Type"=> "text/plain"}, ["Hello, Rack #{text}"]]
    plot_r_norm
    [200,{"Content-Type" => "image/png"}, ["out.png"] ]
  end
  
  def plot_r_norm
    r = new_r
    r.eval "x = rnorm(100,100)"
    r.eval "png('out.png')"
    r.eval "plot(x)"
    r.eval "dev.off()"
  end
  
  def new_r
    r = RinRuby.new(echo = false, interactive = false)
    r.eval "options(warn=-1)"
    return r
  end
  
end

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