问题1:Nginx的X-Accel-Redirect?
答:
对文件下载的权限进行精确控制在很多地方都需要,例如有偿的下载服务,网络硬盘,个人相册,防止本站内容被外站盗链。
假设下载文件的路径在/path/to/files,比如有/path/to/files/test1.txt,可以在nginx里配置
location /down { #这个路径只能在nginx内部访问 internal; alias /path/to/files; }
关键字 internal 指明了那些目录需要通过X-Accel-Redirect头与后台脚本进行内部转向。
问题2: rails利用Nginx的X-Accel-Redirect头实现下载控制?
答:
在nginx的配置文件中添加
location /downloads { internal; alias /path/to/files; #实际存放下载文件的目录 }
在rails的controller中添加
def download if authenticated? #进行验证... #Set the X-Accel-Redirect header with the path relative to the /downloads location in nginx response.headers['X-Accel-Redirect'] = '/downloads/myfile.zip' #Set the Content-Type header as nginx won't change it and Rails will send text/html response.headers['Content-Type'] = 'application/octet-stream' #If you want to force download, set the Content-Disposition header (which nginx won't change) response.headers['Content-Disposition'] = 'attachment; filename=myfile.zip' #Make sure we don't render anything render :nothing => true end end
并且在config/routes.rb路由中添加该controller的路径
#得到要下载的文件名
filename = @params["filename"]
问题3:rails的devise安装及使用http-basic?
答:
devise是提供了登录和验证授权的解决方案
在rails3中安装devise
在Gemfile中添加
gem 'devise'
bundle install
使用
接下来是通过generate安装devise相关代码
rails generate devise:install
rails generate devise user
rails generate devise:views
rake routes 查看路由
在controllers里的applicationController.rb中添加
before_filter :authenticate_user!
配置devise的HTTP Basic Auth
config/initializers/devise.rb设置
config.http_authenticatable = true
重启服务
curl -u [email protected]:password http://127.0.0.1/download
curl http://xx%40xx.com:[email protected]/download
ps:
rails plugin X-Accel-Redirect
@asc%40
http://presentations.royvandewater.com/authentication-with-devise.html
varnish -> cache
proxy_pass -> config