unzip_from_stream.py

import os
from zipfile import ZipFile
from StringIO import StringIO
from urllib import urlopen
from sys import platform as _platform


def unzip_from_stream(url, dest_dir):
  original_zip = ZipFile(StringIO(urlopen(url).read()))
  if _platform == "win32":
    original_zip.extractall(dest_dir)
  elif _platform in ["linux", "linux2", "darwin"]:
    new_zip = ZipFile(StringIO(), 'w')
    with original_zip as f:
      for item in f.infolist():
        new_filename = item.filename.replace('\\', '/')
        new_zip.writestr(new_filename, f.read(item))
    new_zip.extractall(dest_dir)
    new_zip.close()
  original_zip.close()