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# frozen_string_literal: true
module BulkImports
class FileDecompressionService
include Gitlab::ImportExport::CommandLineUtil
ServiceError = Class.new(StandardError)
def initialize(dir:, filename:)
@dir = dir
@filename = filename
@filepath = File.join(@dir, @filename)
@decompressed_filename = File.basename(@filename, '.gz')
@decompressed_filepath = File.join(@dir, @decompressed_filename)
end
def execute
validate_dir
validate_decompressed_file_size if Feature.enabled?(:validate_import_decompressed_archive_size, default_enabled: :yaml)
validate_symlink(filepath)
decompress_file
validate_symlink(decompressed_filepath)
filepath
rescue StandardError => e
File.delete(filepath) if File.exist?(filepath)
File.delete(decompressed_filepath) if File.exist?(decompressed_filepath)
raise e
end
private
attr_reader :dir, :filename, :filepath, :decompressed_filename, :decompressed_filepath
def validate_dir
raise(ServiceError, 'Invalid target directory') unless dir.start_with?(Dir.tmpdir)
end
def validate_decompressed_file_size
raise(ServiceError, 'File decompression error') unless size_validator.valid?
end
def validate_symlink(filepath)
raise(ServiceError, 'Invalid file') if File.lstat(filepath).symlink?
end
def decompress_file
gunzip(dir: dir, filename: filename)
end
def size_validator
@size_validator ||= Gitlab::ImportExport::DecompressedArchiveSizeValidator.new(archive_path: filepath)
end
end
end
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