config.ru

# config.ru

# Serve static files under the `exported` directory:
# - `/` will try to serve your `exported/index.html` file
# - `/foo` will try to serve `exported/foo` or `exported/foo.html` in this order

# Standalone version of Ryan Tomayko's TryStatic, originally part of Rack-Contrib gem.
# https://github.com/rack/rack-contrib/blob/master/lib/rack/contrib/try_static.rb
module Rack

  class TryStatic

    def initialize(app, options)
      @app = app
      @try = ['', *options.delete(:try)]
      @static = ::Rack::Static.new(lambda { [404, {}, []] }, options)
    end

    def call(env)
      orig_path = env['PATH_INFO']
      found = nil
      @try.each do |path|
        resp = @static.call(env.merge!({'PATH_INFO' => orig_path + path}))
        break if 404 != resp[0] && found = resp
      end
      found or @app.call(env.merge!('PATH_INFO' => orig_path))
    end
  end
end

use Rack::TryStatic, :root => 'exported', :urls => %w[/], :try => ['.html', 'index.html', '/index.html']

# Serve 200 response to /heartbeat
map '/heartbeat' do
  run lambda{ |env| [ 200, {}, ''.chars ] }
end

# Serve 404 messages if nothing was found
map '/' do
  run lambda{ |env| [ 404, { 'Content-Type'  => 'text/html' }, File.open('exported/404.html', File::RDONLY) ] }
end