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import zipfile
import zstandard as zstd
import threading
import inspect
from ._patcher import patch
zipfile.ZIP_ZSTANDARD = 93
zipfile.compressor_names[zipfile.ZIP_ZSTANDARD] = 'zstandard'
zipfile.ZSTANDARD_VERSION = 20
@patch(zipfile, '_check_compression')
def zstd_check_compression(compression):
if compression == zipfile.ZIP_ZSTANDARD:
pass
else:
patch.originals['_check_compression'](compression)
class ZstdDecompressObjWrapper:
def __init__(self, o):
self.o = o
def __getattr__(self, attr):
if attr == 'eof':
return False
return getattr(self.o, attr)
@patch(zipfile, '_get_decompressor')
def zstd_get_decompressor(compress_type):
if compress_type == zipfile.ZIP_ZSTANDARD:
return ZstdDecompressObjWrapper(zstd.ZstdDecompressor().decompressobj())
else:
return patch.originals['_get_decompressor'](compress_type)
if 'compresslevel' in inspect.signature(zipfile._get_compressor).parameters:
@patch(zipfile, '_get_compressor')
def zstd_get_compressor(compress_type, compresslevel=None):
if compress_type == zipfile.ZIP_ZSTANDARD:
if compresslevel is None:
compresslevel = 3
return zstd.ZstdCompressor(level=compresslevel, threads=12).compressobj()
else:
return patch.originals['_get_compressor'](compress_type, compresslevel=compresslevel)
else:
@patch(zipfile, '_get_compressor')
def zstd_get_compressor(compress_type, compresslevel=None):
if compress_type == zipfile.ZIP_ZSTANDARD:
if compresslevel is None:
compresslevel = 3
return zstd.ZstdCompressor(level=compresslevel, threads=12).compressobj()
else:
return patch.originals['_get_compressor'](compress_type)
@patch(zipfile.ZipInfo, 'FileHeader')
def zstd_FileHeader(self, zip64=None):
if self.compress_type == zipfile.ZIP_ZSTANDARD:
self.create_version = max(self.create_version, zipfile.ZSTANDARD_VERSION)
self.extract_version = max(self.extract_version, zipfile.ZSTANDARD_VERSION)
return patch.originals['FileHeader'](self, zip64=zip64)
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