racklike_api_impl.rb

require 'nodejs'
require 'native'

module HTTP
  HTTP_JS = Native(node_require('http'))
  class Server
    def self.listen(port, &block)
      HTTP_JS.createServer(lambda { |req_js, res_js|
                             req_opal = Native(req_js)
                             res_opal = Native(res_js)
                             status, headers, body = block.call(req_opal,  res_opal)
                             res_opal.writeHead(status, headers.to_n)
                             res_opal.end(body)
                           }).listen(port)

    end
  end
end

port = 1337
HTTP::Server.listen(port) { |req, res|
  [200, {'Content-Type': 'text/plain'}, "Hello World\n"]
}