如何从URL下载文件并将其保存在Rails中? [英] How can I download a file from a URL and save it in Rails?

问题描述

我有一个要保存在本地的图像的URL，以便可以使用Paperclip为我的应用程序生成缩略图.下载和保存图像的最佳方法是什么? (我研究了ruby文件处理，但没有发现任何问题.)

I have a URL to an image which i want to save locally, so that I can use Paperclip to produce a thumbnail for my application. What's the best way to download and save the image? (I looked into ruby file handling but did not come across anything.)

推荐答案

尝试一下:

require 'open-uri'
open('image.png', 'wb') do |file|
  file << open('http://example.com/image.png').read
end

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