如何创建下载链接 [英] How to Create Download Link

问题描述

创建下载链接的最佳方式是什么?还有比下面更好的方法吗?

What's the best way to create a download link? Is there a better way than the following?

我正在考虑使用 link_to "Download", :controller =>..., :action =>...", :id => ... 在视图中.

I was thinking of using link_to "Download", :controller => ..., :action => ...", :id => ... in the view.

添加 match/documents/download/:id =>文档#download 到 routes.rb

Adding match /documents/download/:id => documents#download to routes.rb

在控制器中:

def download
  send_file ...
end 

此外，如果可能，我希望用户与链接保持在同一页面上.

Also, I'd like, if possible, for the user to remain on the same page as the link.

谢谢.

推荐答案

我将下载操作添加为资源块中的安静路由.这是我的典型代码:

I add the download action as a restful route in a resources block. Here's typical code for me:

routes.rb

  resources :things do
    member do
      get :download
    end
  end    

型号:

  has_attached_file :document,
    :path => ':rails_root/assets/documents/:id/:basename.:extension'
  attr_protected :document_file_name, :document_content_type, :document_file_size

控制器:

  def download
    send_file @thing.document.path, :type => 'application/pdf', :filename => @thing.permalink
  end

查看:

  <%= link_to 'Download', download_thing_path(@thing) %>

这使用户保持在同一页面上，并使用我建议的名称启动下载(我使用固定链接).

This keeps the user on the same page, and just initiates the download with my suggested name (I use permalink).

动态生成是什么意思?它们是由您上传还是由您的应用程序动态创建的?

What do you mean by dynamically generated? Are they uploaded by you or created by your application on the fly?

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