Python LevelDB debug dumper

leveldb_dump.py

#!/usr/bin/env python
import binascii
import sys

import leveldb

def b2x(b):
    """Convert bytes to a hex string"""
    if sys.version > '3':
        return binascii.hexlify(b).decode('utf8')
    else:
        return binascii.hexlify(b)

def db_count(filepath):
    """Prints number of records in LevelDB database"""
    db = leveldb.LevelDB(filepath)
    count = 1
    for k in db.RangeIter(None, None, False):
        count += 1
    print(count)

def db_dump(filepath, to_hex=0):
    """Prints records of LevelDB database"""
    db = leveldb.LevelDB(filepath)
    for k, v in db.RangeIter(None, None):
        if to_hex:
            k = b2x(k)
            v = b2x(v)
        print('%s %s' % (k, v,))

if __name__ == '__main__':
    if len(sys.argv) == 1:
        print('Dumps or counts content of one or more LevelDB databases.')
        print('Binary entries can be converted to hex.\n')
        print('Usage:')
        print('  python %s [--count] [--binary] path1 [path2, path3, ...]\n' % (sys.argv[0],))
        print('Examples:')
        print('  python %s ~/.bitcoin/testnet3/MP_spinfo/' % (sys.argv[0],))
        print('  python %s --count ~/.bitcoin/testnet3/MP_txlist/' % (sys.argv[0],))
        print('  python %s --binary ~/.bitcoin/testnet3/chainstate/' % (sys.argv[0],))

    count  = 0
    to_hex = 0
    for arg in sys.argv[1:]:
        if '--count' in arg:
            count = 1
            continue
        if '--binary' in arg:
            to_hex = 1
            continue

        if count:
            db_count(arg)
        else:
            db_dump(arg, to_hex)