zipfile.is_zipfile() and string buffers

[Gabriel Genellina]

En Tue, 16 Dec 2008 12:28:00 -0200, Brendan <brendandetracey at yahoo.com>  
escribió:

> I would like zipfile.is_zipfile(), to operate on a cStringIO.StringIO
> string buffer, but is seems only to accept file names as arguments.
> Should it not be able to handle string buffers too?

A version of zipfile.is_zipfile() accepting both file names and file  
objects:

def _check_zipfile(fp):
     try:
         if _EndRecData(fp):
             return True         # file has correct magic number
     except IOError:
         pass
     return False

def is_zipfile(filename):
     """Quickly see if file is a ZIP file by checking the magic number."""
     result = False
     try:
         if hasattr(filename, "read"):
             result = _check_zipfile(fp=filename)
         else:
             with open(filename, "rb") as fp:
                 result = _check_zipfile(fp)
     except IOError:
         pass
     return result

-- 
Gabriel Genellina