Access Paperclip image before it's uploaded to S3

问题

My Rails app uploads images to S3 with Paperclip. I want to "intercept" the image before it is sent to S3, convert it to base64, and send it to a third-party API.

How can I access the image before it gets uploaded by Paperclip to S3? This would be quicker than reading the file from S3 afterwards, and then sending it to the third-party API.

回答1:

Try this

class Model < ActiveRecord::Base

  has_attached_file :image

  before_save :send_image

  private

  def send_image
    image.queued_for_write[:original] # <= this is your image
  end
end

来源：https://stackoverflow.com/questions/36344301/access-paperclip-image-before-its-uploaded-to-s3