Rails の controller 側 class DownloadController < ApplicationController def action # 認証処理 ... resource_id = 2 resource = Resource.find resource_id response.header['X-Accel-Redirect'] = '/reproxy' response.header['X-Reproxy-URL'] = resource.data_url render nothing: true end end nginx の 設定 upstream hoge_sock { server unix:/var/www/html/hoge/current/tmp/sockets/unicorn.sock fail_timeout=0; } server { l