12-parse-email.py 文件源码

def generate_email_files(msg):
    counter = 1
    upload_date = time.mktime(email.utils.parsedate(msg["Date"]))
    for part in msg.walk():
        # multipart/* are just containers
        if part.get_content_maintype() == 'multipart':
            continue
        # Applications should really sanitize the given filename so that an
        # email message can't be used to overwrite important files
        filename = part.get_filename()
        if not filename:
            ext = mimetypes.guess_extension(part.get_content_type())
            if not ext:
                # Use a generic bag-of-bits extension
                ext = '.bin'
            filename = 'part-%03d%s' % (counter, ext)
        counter += 1

        data = part.get_payload(decode=True)
        if parse_pathname(filename).ext == '.zip':
            for zipfn, zipdata, zipdt in generate_zip_files(data):
                yield zipfn, zipdata, zipdt
        else:
            yield filename, data, upload_date