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