json_uptime.erb

<%= result.inspect %>

my_app.rb

  get "/uptime/?:format?/?" do
    uptimeReport = Hash.new
    #uptimeReport = Hash.new { |h, k| h[k] = Hash.new &h.default_proc }
    format = params[:format]
    servers = YAML.load_file("uptime.yaml")
    case 
    when format.match(/raw/i)
      erb :raw_uptime, :locals => {"servers" => servers}, :layout => false
    when format.match(/json/i)
      servers.each do |type, value|
        uptimeReport[type] = {}
        value.each do |server, info|
          puts server
          Net::SSH.start(info["host"], info["user"], :port => info["port"], :keys => ["/var/ht/id_rsa"]) do |ssh|
            output = ssh.exec!("uptime")
            puts output
            uptimeReport[type][server] = output.chomp
          end
        end
      end
      puts uptimeReport
      uptimeReport = uptimeReport.to_json
      erb :json_uptime, :locals => {"servers" => servers, "result" => uptimeReport}, :layout => false
    else
      erb :uptime, :locals => {"servers" => servers}
    end
  end

output.json

{"IRC":{"Services Hub":" 01:31:45 up 118 days, 5:31, 0 users, load average: 0.00, 0.00, 0.00","EU Hub/Nanoha":" 01:31:46 up 12 days, 3:02, 2 users, load average: 0.00, 0.01, 0.05","Shitty":" 06:31:56 up 8 days, 13:59, 0 users, load average: 0.00, 0.01, 0.05","Squirrel":" 01:31:48 up 130 days, 15:55, 0 users, load average: 0.02, 0.01, 0.00","Neko":" 22:31:50 up 19 days, 4:07, 0 users, load average: 0.00, 0.01, 0.05","MilkyWay":" 07:31:51 up 173 days, 7:33, 0 users, load average: 0.50, 0.68, 0.74"},"BNC":{"Ood":" 01:31:47 up 24 days, 22:29, 0 users, load average: 0.00, 0.01, 0.05"},"Web etc.":{"Rammy":" 01:31:51 up 30 days, 5 min, 2 users, load average: 0.12, 0.07, 0.08"}}