carrierwave sample

carrierwave/README.md

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+1. Edit carrierwave.yml and fill in your SimpleWorker and AWS information. Make sure that AWS S3 bucket exists.
+2. Run "ruby carrierwave_worker_init.rb" - this will upload image to S3, so worker will have something to work with, and will create simple html page with link to uploaded image.
+3. Finally, run "ruby carrierwave_worker_runner.rb", wait worker to finish and refresh html page.

carrierwave/carrierwave.yml

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+sw:
+  project_id:
+  token:
+
+aws:
+  access_key:
+  secret_key:
+  bucket:
+
+file_name: simple-worker.png

carrierwave/carrierwave_configure.rb

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+def carrierwave_configure(aws_access_key, aws_secret_key, aws_bucket)
+  CarrierWave.configure do |config|
+    config.fog_credentials = {
+      :provider             => 'AWS',
+      :aws_access_key_id     => aws_access_key,
+      :aws_secret_access_key => aws_secret_key
+    }
+
+    config.fog_directory = aws_bucket
+  end
+end

carrierwave/carrierwave_worker.rb

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+require 'simple_worker'
+
+class CarrierWaveWorker < SimpleWorker::Base
+  require 'RMagick' # it's available at SimpleWorker servers
+
+  merge_gem 'carrierwave'
+  # if you need ActiveRecord support, use following line instead
+  # merge_gem 'carrierwave', :require => ['carrierwave', 'carrierwave/orm/activerecord']
+
+  merge_gem 'fog'
+
+  merge 'sample_uploader'
+  merge 'carrierwave_configure'
+
+  attr_accessor :aws_access_key
+  attr_accessor :aws_secret_key
+  attr_accessor :aws_bucket
+  attr_accessor :file_name
+
+  def run
+    carrierwave_configure(@aws_access_key, @aws_secret_key, @aws_bucket)
+    uploader = SampleUploader.new
+
+    uploader.retrieve_from_store!(@file_name)
+    uploader.cache_stored_file!
+
+    i = Magick::ImageList.new(uploader.file.path)
+    ri = i.rotate(90)
+    ri.write(@file_name)
+
+    uploader.store!(File.new(@file_name))
+  end
+end

carrierwave/carrierwave_worker_init.rb

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+require 'yaml'
+require 'carrierwave'
+require 'fog'
+
+require_relative 'sample_uploader'
+require_relative 'carrierwave_configure'
+
+conf = YAML.load_file 'carrierwave.yml'
+carrierwave_configure(conf['aws']['access_key'], conf['aws']['secret_key'], conf['aws']['bucket'])
+
+uploader = SampleUploader.new
+uploader.store!(File.new(conf['file_name']))
+
+File.open("look-at-me.html", "w") do |f|
+  f.puts "<img src=\"#{uploader.url}\" />"
+end
+
+puts "now open look-at-me.html in browser"

carrierwave/carrierwave_worker_runner.rb

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+require 'yaml'
+require 'carrierwave' # must be available at queue time
+
+require_relative 'carrierwave_worker'
+
+conf = YAML.load_file 'carrierwave.yml'
+
+SimpleWorker.configure do |config|
+  config.project_id = conf['sw']['project_id']
+  config.token = conf['sw']['token']
+end
+
+worker = CarrierWaveWorker.new
+
+worker.aws_access_key = conf['aws']['access_key']
+worker.aws_secret_key = conf['aws']['secret_key']
+worker.aws_bucket = conf['aws']['bucket']
+worker.file_name = conf['file_name']
+
+worker.queue

carrierwave/sample_uploader.rb

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+class SampleUploader < CarrierWave::Uploader::Base
+  storage :fog
+end