How to read image metadata from a URL?

Question

I want to read metadata of already uploaded JPEGs on S3. Is there a way to do that in Ruby without downloading the file locally?

The problem I am facing is that Image(Mini)Magick doesn't take a URL as a source (or at least I didn't find the right command).

Update:

This is working:

>> image = MiniMagick::Image.from_file -path_to_file-
>> image["EXIF:datetime"]
=> "2010:07:19 23:07:54"

But I didn't find a good substitude for "from_file", for URLs so something like:

>> image = MiniMagick::Image.from_url http://image_adress.com/image.jpg

doesn't work.

Answer 1

What about using open-uri?

require 'open-uri'

image = nil
open('http://image_adress.com/image.jpg') do |file|
  image = MiniMagick::Image.from_blob(file.read) rescue nil
end
image["EXIF:datetime"] if image