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python-aternos/python_aternos/atjsparse.py

47 lines
1.2 KiB
Python

import regex
import base64
import js2py
from typing import Any
# Thanks to http://regex.inginf.units.it/
arrowexp = regex.compile(r'\w[^\}]*+')
def to_ecma5_function(f:str) -> str:
"""Converts a ECMA6 function to ECMA5 format (without arrow expressions)
:param f: ECMA6 function
:type f: str
:return: ECMA5 function
:rtype: str
"""
match = arrowexp.search(f)
conv = '(function(){' + match.group(0) + '})()'
return regex.sub(
r'(?:s|\(s\)) => s.split\([\'"]{2}\).reverse\(\).join\([\'"]{2}\)',
'function(s){return s.split(\'\').reverse().join(\'\')}',
conv
)
def atob(s:str) -> str:
return base64.standard_b64decode(str(s)).decode('utf-8')
def exec(f:str) -> Any:
"""Executes a JavaScript function
:param f: ECMA6 function
:type f: str
:return: JavaScript interpreter context
:rtype: Any
"""
ctx = js2py.EvalJs({'atob': atob})
ctx.execute('window.document = { };')
ctx.execute('window.Map = function(_i){ };')
ctx.execute('window.setTimeout = function(_f,_t){ };')
ctx.execute('window.setInterval = function(_f,_t){ };')
ctx.execute('window.encodeURIComponent = function(_s){ };')
ctx.execute(to_ecma5_function(f))
return ctx