| #!/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 MB.' |
| 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) |