YandexFotki storage for CarrierWave gem

This gem provides a simple way to upload image files from Rails application to fotki.yandex.ru service.

Getting Started

In Rails, add it to your Gemfile:

gem 'carrierwave'
gem 'carrierwave-yandexfotki'

Quick Start

Creating uploader

Start off by creating an uploader:

app/uploaders/image_uploader.rb

It should look something like this:

class ImageUploader < CarrierWave::Uploader::Base

  storage CarrierWave::Storage::YandexFotki

  yandex_login    'login'
  yandex_password 'password'

  ##
  #  Uncomment this if you want use 'net/http' library instead 'curb'.
  #  Also you need install 'multipart-post' gem for use this option.
  #
  #yandex_net_http true

  ##
  # This required for removing old image from fotki.yandex.ru
  # on updating image attached to model
  #
  before :cache, :remove_old_file_before_cache

  def remove_old_file_before_cache(new_file)
    remove! unless blank?
  end
end

Mount uploader

Add a string column to the model you want to mount the uploader on:

add_column :products, :image, :string

Open your model file and mount the uploader:

class Product
  mount_before_save_uploader :image, ImageUploader
end

NOTE! You should use mount_before_save_uploader instead default mount_uploader method for YandexFotki storage.

Usage

Now you can assign files to the attribute, they will automatically be uploaded when the record is saved.

product = Product.new
product.image = params[:file]
product.save!
product.image.url # => 'http://img-fotki.yandex.ru/get/path/to/file_orig'

You can get different versions (sizes) of the same image from fotki.yandex.ru (without need to resize images on your server):

product.image.url       # original size image url
product.image.url(:xl)  # image fitted to 800x800 px square
product.image.url(100)  # image fitted to 100x100 px square

All available sizes:

 Size          |  Side of the bounding square, px
---------------+----------------------------------
 :orig or nil  |  Original size
 :xl   or 800  |  800
 :l    or 500  |  500
 :m    or 300  |  300
 :s    or 150  |  150
 :xs   or 100  |  100
 :xxs  or 75   |  75 
 :xxxs or 50   |  50 

You can find this info on this page: http://api.yandex.ru/fotki/doc/appendices/photo-storage.xml

Limitations

• Only ActiveRecord ORM supported now.
• Only JPEG, GIF, PNG and BMP images available
• Limited set of image sizes available

Resources

• CarrierWave gem
• YandexFotki API documentation on russian