Massimo Sala <massimo.sala...@gmail.com> added the comment:
Hi Daniel Could you please elaborate the advantages of your loop versus my two lines of code? I don't grasp... Thanks, Massimo On Sat, 18 Apr 2020 at 03:26, Daniel Hillier <rep...@bugs.python.org> wrote: > > Daniel Hillier <daniel.hill...@gmail.com> added the comment: > > Could something similar be achieved by looking for the earliest file > header offset? > > def find_earliest_header_offset(zf): > earliest_offset = None > for zinfo in zf.infolist(): > if earliest_offset is None: > earliest_offset = zinfo.header_offset > else: > earliest_offset = min(zinfo.header_offset, earliest_offset) > return earliest_offset > > > You could also adapt this using > > zinfo.compress_size + len(zinfo.FileHeader()) > > to see if there were any sections inside the archive which were not > referenced from the central directory. Not sure if zip files with arbitrary > bytes inside the archive would be valid everywhere, but I think they are > using zipfile. > > You can also have zipped content inside an archive which has a valid > fileheader but no reference from the central directory. Those entries are > discoverable by implementations which process content serially from the > start of the file but not implementations which rely on the central > directory. > > ---------- > nosy: +dhillier > > _______________________________________ > Python tracker <rep...@bugs.python.org> > <https://bugs.python.org/issue40301> > _______________________________________ > ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue40301> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
