rake task to rename old S3 resources according to new URL encoding

Rename_S3_resources.rb

# Maintenance script needed to rename old S3 resources according to new URL encoding
desc "One-time renaming of all the amazon s3 content"

task :rename_s3_files do |t, args|
  require 'aws/s3'
  require Rails.root.join('app', 'helpers', 'paperclip_sanitization_helper.rb')

  cred = YAML.load(File.open("#{Rails.root}/config/s3.yml"))[Rails.env].symbolize_keys!
  attr_bucket = cred.delete(:bucket)
  AWS::S3::Base.establish_connection! cred

  bucket = AWS::S3::Bucket.find(attr_bucket)
  marker = ''

  renamed = 0
  fine = 0
  failure = 0
  page = 0

  # Rename everything in the bucket
  while bucket.size > 0 do
    page += 1
    puts "\n\n Page #{page}"
    puts "\n From marker #{marker}"
    puts "\n\n--------------------------------------------------"
    bucket.each do |obj|
      name = obj.key.to_s
      encode_name = PaperclipSanitizationHelper.sanitize_string(name)
      begin
        if name == encode_name
          fine += 1
        else
          if name.ascii_only?
            obj.copy(encode_name)
          else
            obj.class.create(encode_name, obj.value, bucket.name)
          end
          renamed += 1
        end
      rescue Exception => e
        failure += 1
        puts "\n\n *****=***** EXCEPTION on key #{obj.key} \n\n"
        puts e.message
        puts "*****=*****"
        next
      end
    end

    marker = bucket.objects.last.key
    bucket = AWS::S3::Bucket.find(attr_bucket, {:marker => marker})
  end

  puts "Renamed: #{renamed} / Failed: #{failure} / All: #{fine + renamed + failure} "

end