mirror of
https://bitbucket.org/anticensority/antizapret-pac-generator-light.git
synced 2024-11-24 06:06:03 +03:00
106 lines
3.2 KiB
Python
Executable File
106 lines
3.2 KiB
Python
Executable File
#!/usr/bin/env python3
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import sys
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import os
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import base64
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import textwrap
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'''
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This script implements LZP compression for PAC file.
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'''
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def encode(inputname):
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TABLE_LEN_BITS = 18
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HASH_MASK = (1 << TABLE_LEN_BITS) - 1
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ifile = open(sys.argv[1], "rb")
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table = bytearray(1 << TABLE_LEN_BITS)
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masks = bytearray()
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obytes = bytearray()
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hashed = 0
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while True:
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mask = 0
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buf = b""
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for i in range(8):
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cb = ifile.read(1)
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if not cb:
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break
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c = ord(cb)
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if c == table[hashed]:
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mask |= 1 << i;
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else:
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table[hashed] = c
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buf += cb
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hashed = ( (hashed << 7) ^ c ) & HASH_MASK
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masks += mask.to_bytes(1, 'big')
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obytes += buf
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if not cb:
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break
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ifile.close()
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return [obytes, masks]
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def findsequence(inputstr):
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wordreplace=["!", "@", "#", "$", "%", "^", "*", "(", ")", "[", "]", "-", ",", ".", "?"]
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patternhit = {}
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pattern_found = {}
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input_len = len(inputstr)
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for patternlen in (2,):
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for round, _ in enumerate(wordreplace):
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position = 0
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while position <= input_len:
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cut = inputstr[position:position+patternlen]
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position += 1
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if len(cut) != patternlen:
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continue
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if not patternhit.get(cut):
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patternhit[cut] = 0
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patternhit[cut] += 1
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#print("Round", round, "patternhit", patternhit)
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patternhit = dict(sorted(patternhit.items(), key=lambda x: len(x[0]) * x[1])[-1:])
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inputstr = inputstr.replace(list(patternhit.keys())[0], '')
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pattern_found.update(patternhit)
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patternhit = {}
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print("Round", round, "pattern_found", pattern_found)
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pattern_ret = {}
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for i, p in enumerate(pattern_found.keys()):
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pattern_ret.update({p: wordreplace[i]})
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return pattern_ret
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if __name__ == "__main__":
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if len(sys.argv) != 5:
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print("{}: <input.txt> <output_data.txt> <output_mask.txt> <pac function.js>".format(sys.argv[0]))
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sys.exit(1)
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ofile = open(sys.argv[2], "wb")
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mfile = open(sys.argv[3], "wb")
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obytes, masks = encode(sys.argv[1])
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masks_b64 = base64.b64encode(masks).decode()
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masks_seqences = findsequence(masks_b64)
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masks_sequenced = masks_b64
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for k, v in masks_seqences.items():
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#print(k, v)
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masks_sequenced = masks_sequenced.replace(k, v)
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print("masks:", len(masks), " masks_b64:", len(masks_b64), " masks_sequenced:", len(masks_sequenced))
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print("obytes:", len(obytes))
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print("overall:", len(obytes) + len(masks_sequenced))
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os.write(ofile.fileno(), "\\\n".join(textwrap.wrap(obytes.decode(), 8192, expand_tabs=False, replace_whitespace=False, drop_whitespace=False, break_long_words=True, break_on_hyphens=False)).encode())
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os.write(mfile.fileno(), "\\\n".join(textwrap.wrap(masks_sequenced, 8192, expand_tabs=False, replace_whitespace=False, drop_whitespace=False, break_long_words=True, break_on_hyphens=False)).encode())
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ofile.close()
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mfile.close()
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with open(sys.argv[4], "w") as pacfile:
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print(masks_seqences, file=pacfile)
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