Rails: How to to download a file from a http and save it into database

Question

i would like to create a Rails controller that download a serie of jpg files from the web and directly write them into database as binary (I am not trying to do an upload form)

Any clue on the way to do that ?

Thank you

Edit : Here is some code I already wrote using attachment-fu gem :

http = Net::HTTP.new('awebsite', 443)
http.use_ssl = true
http.verify_mode = OpenSSL::SSL::VERIFY_NONE
http.start() { |http|
   req = Net::HTTP::Get.new("image.jpg")
   req.basic_auth login, password
   response = http.request(req)
   attachment = Attachment.new(:uploaded_data => response.body)
   attachement.save
}

And I get an "undefined method `content_type' for #" error

Answer 1

Use open-url (in the Ruby stdlib) to grab the files, then use a gem like paperclip to store them in the db as attachments to your models.

UPDATE:

Attachment_fu does not accept the raw bytes, it needs a "file-like" object. Use this example of a LocalFile along with the code below to dump the image into a temp file then send that to your model.

  http = Net::HTTP.new('www.google.com')
  http.start() { |http|
     req = Net::HTTP::Get.new("/intl/en_ALL/images/srpr/logo1w.png")
     response = http.request(req)
     tempfile = Tempfile.new('logo1w.png')
     File.open(tempfile.path,'w') do |f|
       f.write response.body
     end
     attachment = Attachment.new(:uploaded_data => LocalFile.new(tempfile.path))
     attachement.save
  }