User talk:Rick/Save research

Using this info and some other resources I've scrounged up a bit of python code that will extract the chunks. I hope this is useful to someone. they seem to be one file broken up into 20k chunks. Useable on other dat files.

Usage: python script.py world.dat

a copy of World.dat must be in same directory as script.

import zlib, struct, sys

def main(args):
    fp = file(args[0], 'rb') 

    i = 1

    while True:
        data = fp.read(4)
        if len(data) != 4:
            break

        length = struct.unpack('<L', data)[0]
        file('Chunk_%i.dat' % i, 'wb').write(zlib.decompress(fp.read(length)))
        i += 1

if __name__=='__main__':
    sys.exit(main(sys.argv[1:]))