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tools/compress_json.py
33 строки
900 B
Antoine du Hamel
doc: consolidate use of multiple-byte units
20 апр 2022, 01:46
Не верифицирован
20 апр 2022, 01:46
1e76165
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#!/usr/bin/env python import json import struct import sys import zlib try: xrange # Python 2 PY2 = True except NameError: PY2 = False xrange = range # Python 3 if __name__ == '__main__': with open(sys.argv[1]) as fp: obj = json.load(fp) text = json.dumps(obj, separators=(',', ':')).encode('utf-8') data = zlib.compress(text, zlib.Z_BEST_COMPRESSION) # To make decompression a little easier, we prepend the compressed data # with the size of the uncompressed data as a 24 bits BE unsigned integer. assert len(text) < 1 << 24, 'Uncompressed JSON must be < 16 MiB.' data = struct.pack('>I', len(text))[1:4] + data step = 20 slices = (data[i:i+step] for i in xrange(0, len(data), step)) slices = [','.join(str(ord(c) if PY2 else c) for c in s) for s in slices] text = ',\n'.join(slices) with open(sys.argv[2], 'w') as fp: fp.write(text)