Ruby on Rails - Base64的外部图像URL

Question

无论如何在Ruby on Rails中转换图像URL(https://meo-fb-natal-dev.s3.amazonaws.com/participations/cropped/56658c5de2fc7116340000c0/635769180217506883-GD5A9264.jpg?1449495643)中托管的图像Base64编码？

我已经尝试了很多东西,但它们似乎都没有用.

Answer 1

究竟什么不起作用？

这是一个例子:

$> irb
>> require 'open-uri'
>> img = open("https://meo-fb-natal-dev.s3.amazonaws.com/participations/cropped/56658c5de2fc7116340000c0/635769180217506883-GD5A9264.jpg?1449495643")
# img variable is a tempfile with image
>> require 'base64'
>> Base64.encode64(img.read)
=> "/9j/4AAQSkZJRgABAQEASABIAAD/2wBDAAYEBQYFBAYGBQYHBwYIChAKCgkJ\nChQODwwQFxQYGBcUFhYaHSUfGhsjHBYWICwgIyYnKSopGR8tMC0oMCUoKSj/\n2wBDAQcHBwoIChMKChMoGhYaKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgo\nKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCj/wAARCAFTAoYDASIAAhEBAxEB/8QA\nHAAAAAcBAQAAAAAAAAAAAAAAAQIDBAUGBwAI/8QAShAAAgEDAgQEAwUGB..."