antizapret-pac-generator-light/scripts/topsequences.py
2024-03-24 22:51:46 +07:00

99 lines
3.5 KiB
Python
Executable File

#!/usr/bin/env python3
import sys
'''
This script finds the most common two-character sequences
and replace them with a single uppercase character or
special character, to compression purposes.
'''
if len(sys.argv) != 4:
print("{}: <host list.txt> <awk output.awk> <pac function.js>".format(sys.argv[0]))
sys.exit(1)
#patternhit = {"cloudfront": 999999999}
patternhit = {}
# "&" character should be prepended with two backslashes for awk's gsub.
wordreplace=["A", "B", "C", "D", "E", "F", "G", "H", "I", "J",
"K", "L", "M", "N", "O", "P", "Q", "R", "S", "T",
"U", "V", "W", "X", "Y", "Z",
"@", "#", "$", "%", "^", "\\\\&", "*", "(", ")",
"=", "+", "/", ",", "<", ">", "~", "[", "]", "{", "}",
"`", ":", ";", "?"]
wordreplace_big = ["!" + x for x in wordreplace]
with open(sys.argv[1], "r") as dfile:
domains = dfile.read().split("\n")
new_domains = []
for domain in domains:
#print('.'.join(domain.split(".")[:-1]))
#sys.exit(1)
new_domains.append('.'.join(domain.split(".")[:-1]))
domains = ''.join(new_domains)
domain_len = len(domains)
position = 0
pattern_found = {}
for patternlen in (4,):
for round, _ in enumerate(wordreplace_big):
position = 0
while position <= domain_len:
cut = domains[position:position+patternlen]
position += 1
if len(cut) != patternlen:
continue
if not patternhit.get(cut):
patternhit[cut] = 0
patternhit[cut] += 1
#print("Round", round, "patternhit", patternhit)
patternhit = dict(sorted(patternhit.items(), key=lambda x: len(x[0]) * x[1])[-1:])
domains = domains.replace(list(patternhit.keys())[0], '')
pattern_found.update(patternhit)
patternhit = {}
print("Big round", round, "pattern_found", pattern_found)
for patternlen in (2,):
for round, _ in enumerate(wordreplace):
position = 0
while position <= domain_len:
cut = domains[position:position+patternlen]
position += 1
if len(cut) != patternlen:
continue
if not patternhit.get(cut):
patternhit[cut] = 0
patternhit[cut] += 1
#print("Round", round, "patternhit", patternhit)
patternhit = dict(sorted(patternhit.items(), key=lambda x: len(x[0]) * x[1])[-1:])
domains = domains.replace(list(patternhit.keys())[0], '')
pattern_found.update(patternhit)
patternhit = {}
print("Round", round, "pattern_found", pattern_found)
#patternhit = dict(sorted(patternhit.items(), key=lambda x: len(x[0]) * x[1]))
patternhit = pattern_found
print(patternhit)
#print(patternhit, file=sys.stderr)
#finallist = list(patternhit)[:len(wordreplace)]
finallist = list(patternhit)
#finallist.reverse()
print(finallist, file=sys.stderr)
wordreplace = wordreplace_big + wordreplace
with open(sys.argv[2], "w") as awkfile:
print("{", file=awkfile)
for i, w in enumerate(finallist):
print('gsub(/{}/, "{}", domainname)'.format(w.replace(".", "\\."), wordreplace[i]), file=awkfile)
print("}", file=awkfile)
with open(sys.argv[3], "w") as pacfile:
pacdict = {}
for i, w in enumerate(finallist):
pacdict[wordreplace[i].strip('\\')] = w
print(pacdict, file=pacfile)