discourse/lib/theme_store/zip_importer.rb

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# frozen_string_literal: true
require 'compression/engine'
module ThemeStore; end
class ThemeStore::ZipImporter
attr_reader :url
def initialize(filename, original_filename)
@temp_folder = "#{Pathname.new(Dir.tmpdir).realpath}/discourse_theme_#{SecureRandom.hex}"
@filename = filename
@original_filename = original_filename
end
def import!
FileUtils.mkdir(@temp_folder)
available_size = SiteSetting.decompressed_theme_max_file_size_mb
Compression::Engine.engine_for(@original_filename).tap do |engine|
engine.decompress(@temp_folder, @filename, available_size)
strip_root_directory
end
rescue RuntimeError
raise RemoteTheme::ImportError, I18n.t("themes.import_error.unpack_failed")
rescue Compression::Zip::ExtractFailed
raise RemoteTheme::ImportError, I18n.t("themes.import_error.file_too_big")
end
def cleanup!
FileUtils.rm_rf(@temp_folder)
end
def version
""
end
def strip_root_directory
root_files = Dir.glob("#{@temp_folder}/*")
if root_files.size == 1 && File.directory?(root_files[0])
FileUtils.mv(Dir.glob("#{@temp_folder}/*/*"), @temp_folder)
end
end
def real_path(relative)
fullpath = "#{@temp_folder}/#{relative}"
return nil unless File.exist?(fullpath)
# careful to handle symlinks here, don't want to expose random data
fullpath = Pathname.new(fullpath).realpath.to_s
if fullpath && fullpath.start_with?(@temp_folder)
fullpath
else
nil
end
end
def all_files
Dir.glob("**/**", base: @temp_folder).reject { |f| File.directory?(File.join(@temp_folder, f)) }
end
def [](value)
fullpath = real_path(value)
return nil unless fullpath
File.read(fullpath)
end
end