python - 如何膨胀 gzipped，base64d 字符串

Question

I'm just wondering how is it possible to inflate/decompress a string of text that is a gzipped compressed string that also hase base64 encoding?

For instance, all the python examples seem to focus on opening a file, whereas I want to work on a gzipped string.

Answer 1

Under python3, other answers didn't help me but I found this:

import base64
import zlib
data = 'H4sIAAAAAAAAAHWPwQqCQBCGX0Xm7EFtK+smZBEUgXoLCdMhFtKV3akI8d0bLYmibvPPN3wz00CJxmQnTO41whwWQRIctmEcB6sQbFC3CjW3XW8kxpOpP+OC22d1Wml1qZkQGtoMsScxaczKN3plG8zlaHIta5KqWsozoTYw3/djzwhpLwivWFGHGpAFe7DL68JlBUk+l7KSN7tCOEJ4M3/qOI49vMHj+zCKdlFqLaU2ZHV2a4Ct/an0/ivdX8oYc1UVX860fQDQiMdxRQEAAA=='

json_str = zlib.decompress(base64.b64decode(data), 16 + zlib.MAX_WBITS).decode('utf-8')

hope this helps

Answer 2

For me the following code worked best (gzip without file)

import base64
import gzip

base64_message = # string containing base64 encoded data
base64_bytes = base64_message.encode('utf-8')
message_bytes = base64.b64decode(base64_bytes)
print(gzip.decompress(message_bytes))

Answer 3

You can use base64 and zlib libraries:

import base64, zlib
decoded_data = zlib.decompress(base64.b64decode(encoded_data))

The gzip module is only for file operations: https://docs.python.org/2/library/gzip.html . It uses zlib for actual compression/decompression.

Answer 4

The GzipFile in the gzip module allows you to provide a fileobj argument. If the string is really gzipped (ie: it has the proper headers) you can then wrap the string in a StringIO object and pass it around

import base64
import gzip
from io import StringIO

gzippedstr = fetchgzippedstr()  # wherever it may come from
gzcontent = gzip.GzipFile(fileobj=StringIO(gzippedstr))
b64content = gzcontent.read()
content = base64.b64decode(b64content)