回形针S3下载远程图片 [英] Paperclip S3 download remote images

问题描述

我怎么可以下载一个远程图像（http协议，URL是在image_remote_url属性），并将其保存为经回形针的附件S3？

How I can download a remote image (http protocol, the url is in the image_remote_url attribute) and save it as an attachment to S3 via Paperclip ?

class Product < ActiveRecord::Base
  require 'open-uri'
  attr_accessor :image_remote_url
  has_attached_file :photo,
    :storage => :s3,
    :s3_credentials => "#{RAILS_ROOT}/config/s3.yml",
    :path => ":class/:id/:style.:extension",
    :bucket => "my_bucket",
    :styles => {
      :icon => "32x32#",
  }

  def fetch_image
    # how should this method look ?
  end

end

应该如何方法fetch_image一下？

How should the method "fetch_image" look ?

推荐答案

这里有一个链接到一个网页，解释正是你需要的。

Here's a link to a page that explains exactly what you need.

的http://trevorturk.word$p$pss.com/2008/12/11/easy-upload-via-url-with-paperclip/

我已经成功地在我自己的网站来实现它。

I've implemented it successfully on my own site.

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