class Webpacker::DevServerProxy

def perform_request(env)
  if env["PATH_INFO"].start_with?("/#{public_output_uri_path}") && Webpacker.dev_server.running?
    env["HTTP_HOST"] = env["HTTP_X_FORWARDED_HOST"] = env["HTTP_X_FORWARDED_SERVER"] = Webpacker.dev_server.host_with_port
    env["SCRIPT_NAME"] = ""
    super(env)
  else
    @app.call(env)
  end
end

def public_output_uri_path
  Webpacker.config.public_output_path.relative_path_from(Webpacker.config.public_path)
end

def rewrite_response(response)
  _status, headers, _body = response
  headers.delete "transfer-encoding"
  headers.delete "content-length" if Webpacker.dev_server.running? && Webpacker.dev_server.https?
  response
end