Angular directive for uploading base64-encoded files that you can pass along with the resource model. This directive is based from one of the answers in this SO question.

Note: This directive only supports single file selection.

Bower: bower install angular-base64-upload

See the README.md on demo folder.

Include angular.js and angular-base64-upload.js in your application and add naif.base64 as dependency to your main module:

angular.module('myApp', ['naif.base64']);

HTML:

<form>
  <input type='file' ng-model='yourModel' base-sixty-four-input>
</form>

Sample yourModel value after selecting a file:

{
  "filesize": 54836 (bytes),
  "filetype": "image/jpeg",
  "filename": "profile.jpg",
  "base64":   "/9j/4AAQSkZJRgABAgAAAQABAAD//gAEKgD/4gIcSUNDX1BST0ZJTEUAAQEAAAIMbGNtcwIQA..."
}

You can use the base-sixty-four-image directive to display image preview:

<img base-sixty-four-image="yourModel">

If you also want to display a placeholder image, you can additionally use base-sixty-four-image-placeholder directive:

<img base-sixty-four-image="yourModel" base-sixty-four-image-placeholder="placeholder.png">

You will have to decode the base64 file in your backend on your own. Sample PHP code for decoding base64 file in demo folder. Start it by cd-ing to this directory and running:

php -S 0.0.0.0:8000

Then point your browser to http://localhost:8000.

Below is a ruby code for decoding the base64-encoded file to be passed to paperclip:

def create
  @resource.attachment = decode_base64
  # save resource and render response ...
end

def decode_base64
  # decode base64 string
  Rails.logger.info 'decoding base64 file'
  decoded_data = Base64.decode64(params[:your_model][:base64])
  # create 'file' understandable by Paperclip
  data = StringIO.new(decoded_data)
  data.class_eval do
    attr_accessor :content_type, :original_filename
  end

  # set file properties
  data.content_type = params[:your_model][:filetype]
  data.original_filename = params[:your_model][:filename]
  
  # return data to be used as the attachment file (paperclip)
  data
end

Released under the terms of MIT License.