cloak.py 文件源码

def main():
    usage = '%s [-d] -i <input file> [-o <output file>]' % sys.argv[0]
    parser = OptionParser(usage=usage, version='0.1')

    try:
        parser.add_option('-d', dest='decrypt', action="store_true", help='Decrypt')
        parser.add_option('-i', dest='inputFile', help='Input file')
        parser.add_option('-o', dest='outputFile', help='Output file')

        (args, _) = parser.parse_args()

        if not args.inputFile:
            parser.error('Missing the input file, -h for help')

    except (OptionError, TypeError), e:
        parser.error(e)

    if not os.path.isfile(args.inputFile):
        print 'ERROR: the provided input file \'%s\' is non existent' % args.inputFile
        sys.exit(1)

    if not args.decrypt:
        data = cloak(args.inputFile)
    else:
        data = decloak(args.inputFile)

    if not args.outputFile:
        if not args.decrypt:
            args.outputFile = args.inputFile + '_'
        else:
            args.outputFile = args.inputFile[:-1]

    f = open(args.outputFile, 'wb')
    f.write(data)
    f.close()