base64 decoding by paperclip in rails 3

I am developing a server backend for my i开发者_JAVA技巧phone application. I need to upload a picture from my Iphone app to the rails server

I have a base64 encoded image in the post request from my app which I need to parse and send to the Paperclip plugin for the re-sizing of the image.So can anybody suggest me how to do it.

Help me!!!. Thanks in advance.

---

In order to save image with correct extension you have to specify content type. It's quite nice to have this in your model as method which is called before_validation

   StringIO.open(Base64.decode64(self.photo_base64)) do |data|
      data.original_filename = "image_name.jpg"
      data.content_type = "image/jpeg"
      self.photo = data
    end

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Try this:

sio = StringIO.new(Base64.decode64(string))

[ source: base64 photo and paperclip -Rails ]