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rubyrack

How to set port for Rack app?

builder.rb:

def app
  Rack::Builder.new do
    run App.new
  end.to_app
end

How to run on a given port?

Solution

  • Try:

    Rack::Handler.default.run(app, :Port => 3000)

    Although it would be more typical to run your app in a config.ru file and specify port as a command line option to rackup, e.g.: rackup -p 3000.