class ActiveStorage::Service::DatabaseService

Constants

CHUNK_SIZE

Public Instance Methods

delete(key) click to toggle source
# File lib/active_storage/service/database_service.rb, line 36
def delete(key)
  instrument :delete, key: key do
    ActivestorageDatabase::File.find_by(key: key)&.destroy
  end
end
delete_prefixed(prefix) click to toggle source
# File lib/active_storage/service/database_service.rb, line 42
def delete_prefixed(prefix)
  instrument :delete_prefixed, prefix: prefix do
    ActivestorageDatabase::File.where("key LIKE ?", "#{prefix}%").destroy_all
  end
end
download(key, &block) click to toggle source
# File lib/active_storage/service/database_service.rb, line 16
def download(key, &block)
  if block_given?
    instrument :streaming_download, key: key do
      stream(key, &block)
    end
  else
    instrument :download, key: key do
      record = ActivestorageDatabase::File.find_by(key: key)
      record&.data || raise(ActiveStorage::FileNotFoundError)
    end
  end
end
download_chunk(key, range) click to toggle source
# File lib/active_storage/service/database_service.rb, line 29
def download_chunk(key, range)
  instrument :download_chunk, key: key, range: range do
    chunk_select = "SUBSTRING(data FROM #{range.begin + 1} FOR #{range.size}) AS chunk"
    ActivestorageDatabase::File.select(chunk_select).find_by(key: key)&.chunk || raise(ActiveStorage::FileNotFoundError)
  end
end
exist?(key) click to toggle source
# File lib/active_storage/service/database_service.rb, line 48
def exist?(key)
  instrument :exist, key: key do |payload|
    answer = ActivestorageDatabase::File.where(key: key).exists?
    payload[:exist] = answer
    answer
  end
end
headers_for_direct_upload(_key, content_type:, **) click to toggle source
# File lib/active_storage/service/database_service.rb, line 92
def headers_for_direct_upload(_key, content_type:, **)
  { 'Content-Type' => content_type }
end
upload(key, io, checksum: nil, **) click to toggle source
# File lib/active_storage/service/database_service.rb, line 7
def upload(key, io, checksum: nil, **)
  instrument :upload, key: key, checksum: checksum do
    file = ActivestorageDatabase::File.create!(key: key, data: io.read)
    ensure_integrity_of(key, checksum) if checksum

    file
  end
end
url(key, expires_in:, filename:, disposition:, content_type:) click to toggle source
# File lib/active_storage/service/database_service.rb, line 56
def url(key, expires_in:, filename:, disposition:, content_type:)
  instrument :url, key: key do |payload|
    content_disposition = content_disposition_with(type: disposition, filename: filename)
    verified_key_with_expiration = ActiveStorage.verifier.generate(
        {
            key: key,
            disposition: content_disposition,
            content_type: content_type
        },
        expires_in: expires_in,
        purpose: :blob_key
    )

    url_helpers.service_url(verified_key_with_expiration, filename: filename, **url_options)
  end
end
url_for_direct_upload(key, expires_in:, content_type:, content_length:, checksum:) click to toggle source
# File lib/active_storage/service/database_service.rb, line 73
def url_for_direct_upload(key, expires_in:, content_type:, content_length:, checksum:)
  instrument :url, key: key do |payload|
    verified_token_with_expiration = ActiveStorage.verifier.generate(
        {
            key: key,
            content_type: content_type,
            content_length: content_length,
            checksum: checksum
        },
        expires_in: expires_in,
        purpose: :blob_token
    )

    url_helpers.update_service_url(verified_token_with_expiration, url_options) do |generated_url|
      payload[:url] = generated_url
    end
  end
end

Private Instance Methods

ensure_integrity_of(key, checksum) click to toggle source
# File lib/active_storage/service/database_service.rb, line 101
def ensure_integrity_of(key, checksum)
  file = ::ActivestorageDatabase::File.find_by(key: key)
  return if Digest::MD5.base64digest(file.data) == checksum

  delete(key)
  raise ActiveStorage::IntegrityError
end
stream(key) { |download_chunk(key, range)| ... } click to toggle source
# File lib/active_storage/service/database_service.rb, line 109
def stream(key)
  size = ActivestorageDatabase::File.select('OCTET_LENGTH(data) AS size').find_by(key: key)&.size || raise(ActiveStorage::FileNotFoundError)

  (size / CHUNK_SIZE.to_f).ceil.times.each do |i|
    range = (i * CHUNK_SIZE..(i + 1) * CHUNK_SIZE - 1)
    yield download_chunk(key, range)
  end
end
url_helpers() click to toggle source
# File lib/active_storage/service/database_service.rb, line 118
def url_helpers
  @url_helpers ||= ActivestorageDatabase::Engine.routes.url_helpers
end
url_options() click to toggle source
# File lib/active_storage/service/database_service.rb, line 97
def url_options
  ActiveStorage::Current.url_options
end