Ruby on Rails-Base64的外部映像網址

Question

Ruby on Rails中是否有將圖片網址（ https://meo-fb-natal-dev.s3.amazonaws.com/participations/cropped/56658c5de2fc7116340000c0/635769180217506506-GD5A9264.jpg?1449495643 ）中托管的圖片轉換為反義詞Base64？

我嘗試了很多東西，但似乎都沒有用。

Answer 1

到底什么不起作用？

這是一個例子：

$> 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..."

Answer 2

你可以試試這個

url = "https://meo-fb-natal-dev.s3.amazonaws.com/participations/cropped/56658c5de2fc7116340000c0/635769180217506883-GD5A9264.jpg?1449495643"
ActiveSupport::Base64.encode64(open(url) { |io| io.read })