直接用网上的代码最常用的那段代码,但是有BUG,跑不起来,所以改写了一下,包括读写的次数控制,错误的捕获抛出,Python3可以直接跑.
详细代码
import os
import zlib
import math
BUFFER_SIZE
= 1024
def compress(infile
, dstfile
):
filesize
= os
.path
.getsize
(infile
)
read_times
= math
.ceil
(filesize
/ BUFFER_SIZE
)
zip = zlib
.compressobj
(level
=9, wbits
=15, memLevel
=9)
try:
dstfile
= open(dstfile
, "wb")
with open(filename
, "rb") as infile
:
for i
in range(read_times
):
zip_buffer
= zip.compress
(infile
.read
(BUFFER_SIZE
))
dstfile
.write
(zip_buffer
)
dstfile
.write
(zip.flush
())
except:
raise
finally:
dstfile
.close
()
return 1
def decompress(zipfile
, dstfile
):
filesize
= os
.path
.getsize
(zipfile
)
read_times
= math
.ceil
(filesize
/ BUFFER_SIZE
)
dzip
= zlib
.decompressobj
()
try:
dstfile
= open(dstfile
, "wb")
with open(zipname
, "rb")as zipfile
:
for i
in range(read_times
):
file_buffer
= dzip
.decompress
(zipfile
.read
(BUFFER_SIZE
))
dstfile
.write
(file_buffer
)
except:
raise
finally:
dstfile
.close
()
return 1
if __name__
== '__main__':
filename
= "demo.jpg"
zipname
= "demo.gzip"
compress
(filename
, zipname
)
d_zipname
= "demo.gzip"
d_filename
= "d_demo.jpg"
decompress
(d_zipname
, d_filename
)
比较源文件和解压文件的一致性
def check_consistance(filename1
, filename2
):
file1_size
= os
.path
.getsize
(filename1
)
with open(filename1
, "rb") as file1
:
buffer1
= file1
.read
(file1_size
)
file2_size
= os
.path
.getsize
(filename2
)
with open(filename2
, "rb") as file2
:
buffer2
= file2
.read
(file2_size
)
if buffer1
== buffer2
:
return True
else:
return False
print(check_consistance
(filename
,d_filename
))
