def compress_readable_output(src_file, compress_level=6):
crc = zlib.crc32(b"")
size = 0
zobj = zlib.compressobj(compress_level, zlib.DEFLATED, -zlib.MAX_WBITS,
zlib.DEF_MEM_LEVEL, zlib.Z_DEFAULT_STRATEGY)
prefix_written = False
while True:
data = src_file.read(DEFAULT_BUFFER_SIZE)
if not data:
break
size += len(data)
crc = zlib.crc32(data, crc)
data = zobj.compress(data)
if not prefix_written:
prefix_written = True
data = gzip_prefix() + data
yield data
yield zobj.flush() + struct.pack(b"<LL", crc & 0xffffffffL, size)
python类Z_DEFAULT_STRATEGY的实例源码
def zlib_compressobj(level=6, method=zlib.DEFLATED, wbits=15, memlevel=8,
strategy=zlib.Z_DEFAULT_STRATEGY):
return zlib.compressobj(level, method, wbits, memlevel, strategy)
def zlib_compressobj(level=6, method=zlib.DEFLATED, wbits=15, memlevel=8,
strategy=zlib.Z_DEFAULT_STRATEGY):
return zlib.compressobj(level, method, wbits, memlevel, strategy)
def zlib_compressobj(level=6, method=zlib.DEFLATED, wbits=15, memlevel=8,
strategy=zlib.Z_DEFAULT_STRATEGY):
return zlib.compressobj(level, method, wbits, memlevel, strategy)
def zlib_compressobj(level=6, method=zlib.DEFLATED, wbits=15, memlevel=8,
strategy=zlib.Z_DEFAULT_STRATEGY):
return zlib.compressobj(level, method, wbits, memlevel, strategy)
def zlib_compressobj(level=6, method=zlib.DEFLATED, wbits=15, memlevel=8,
strategy=zlib.Z_DEFAULT_STRATEGY):
return zlib.compressobj(level, method, wbits, memlevel, strategy)
