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|
# frozen_string_literal: true
require "fileutils"
require "pathname"
require "digest/md5"
require "active_support/core_ext/numeric/bytes"
module ActiveStorage
# Wraps a local disk path as an Active Storage service. See ActiveStorage::Service for the generic API
# documentation that applies to all services.
class Service::DiskService < Service
attr_reader :root, :host
def initialize(root:, host: "http://localhost:3000")
@root, @host = root, host
end
def upload(key, io, checksum: nil)
instrument :upload, key: key, checksum: checksum do
IO.copy_stream(io, make_path_for(key))
ensure_integrity_of(key, checksum) if checksum
end
end
def download(key)
if block_given?
instrument :streaming_download, key: key do
File.open(path_for(key), "rb") do |file|
while data = file.read(64.kilobytes)
yield data
end
end
end
else
instrument :download, key: key do
File.binread path_for(key)
end
end
end
def delete(key)
instrument :delete, key: key do
begin
File.delete path_for(key)
rescue Errno::ENOENT
# Ignore files already deleted
end
end
end
def delete_prefixed(prefix)
instrument :delete_prefixed, prefix: prefix do
Dir.glob(path_for("#{prefix}*")).each do |path|
FileUtils.rm_rf(path)
end
end
end
def exist?(key)
instrument :exist, key: key do |payload|
answer = File.exist? path_for(key)
payload[:exist] = answer
answer
end
end
def url(key, expires_in:, filename:, disposition:, content_type:)
instrument :url, key: key do |payload|
verified_key_with_expiration = ActiveStorage.verifier.generate(key, expires_in: expires_in, purpose: :blob_key)
generated_url =
Rails.application.routes.url_helpers.rails_disk_service_url(
verified_key_with_expiration,
filename: filename,
disposition: content_disposition_with(type: disposition, filename: filename),
content_type: content_type,
host: host
)
payload[:url] = generated_url
generated_url
end
end
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 }
)
generated_url = Rails.application.routes.url_helpers.update_rails_disk_service_url(verified_token_with_expiration, host: host)
payload[:url] = generated_url
generated_url
end
end
def headers_for_direct_upload(key, content_type:, **)
{ "Content-Type" => content_type }
end
private
def path_for(key)
File.join root, folder_for(key), key
end
def folder_for(key)
[ key[0..1], key[2..3] ].join("/")
end
def make_path_for(key)
path_for(key).tap { |path| FileUtils.mkdir_p File.dirname(path) }
end
def ensure_integrity_of(key, checksum)
unless Digest::MD5.file(path_for(key)).base64digest == checksum
delete key
raise ActiveStorage::IntegrityError
end
end
end
end
|
