proxy_request = ->(env : HTTP::Server::Context) do
  req = env.request

  req.path = "some_prefix" + req.path

  req.headers.delete("Accept-Encoding")
  req.headers.delete("X-Auth-Token")

  response = HTTP::Client.new(
    "new_host", 443, true
  ).exec req

  env.response.headers.merge!(response.headers)
  env.response.status_code = response.status_code
  env.response.print response.body
  env.response.flush
  ""
end