discourse/lib/compression/gzip.rb

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# frozen_string_literal: true
module Compression
class Gzip < Strategy
def extension
'.gz'
end
def compress(path, target_name)
gzip_target = sanitize_path("#{path}/#{target_name}")
Discourse::Utils.execute_command('gzip', '-5', gzip_target, failure_message: "Failed to gzip file.")
"#{gzip_target}.gz"
end
private
def entries_of(compressed_file)
[compressed_file]
end
def is_file?(_)
true
end
def extract_folder(_entry, _entry_path); end
def get_compressed_file_stream(compressed_file_path)
gzip = Zlib::GzipReader.open(compressed_file_path)
yield(gzip)
end
def build_entry_path(_compressed_file, dest_path, compressed_file_path, entry, _allow_non_root_folder)
compressed_file_path.gsub(extension, '')
end
def extract_file(entry, entry_path, available_size)
remaining_size = available_size
if ::File.exist?(entry_path)
raise ::Zip::DestinationFileExistsError,
"Destination '#{entry_path}' already exists"
end # Change this later.
::File.open(entry_path, 'wb') do |os|
buf = ''.dup
while (buf = entry.read(chunk_size))
remaining_size -= chunk_size
raise ExtractFailed if remaining_size.negative?
os << buf
end
end
remaining_size
end
end
end