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67 lines
2.2 KiB
Python
67 lines
2.2 KiB
Python
#
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# General code for JSBeautifier unpackers infrastructure. See README.specs
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# written by Stefano Sanfilippo <a.little.coder@gmail.com>
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#
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"""General code for JSBeautifier unpackers infrastructure."""
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import pkgutil
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import re
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from . import evalbased
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# NOTE: AT THE MOMENT, IT IS DEACTIVATED FOR YOUR SECURITY: it runs js!
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BLACKLIST = ['jsbeautifier.unpackers.evalbased']
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class UnpackingError(Exception):
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"""Badly packed source or general error. Argument is a
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meaningful description."""
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def getunpackers():
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"""Scans the unpackers dir, finds unpackers and add them to UNPACKERS list.
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An unpacker will be loaded only if it is a valid python module (name must
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adhere to naming conventions) and it is not blacklisted (i.e. inserted
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into BLACKLIST."""
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path = __path__
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prefix = __name__ + '.'
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unpackers = []
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interface = ['unpack', 'detect', 'PRIORITY']
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for _importer, modname, _ispkg in pkgutil.iter_modules(path, prefix):
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if 'tests' not in modname and modname not in BLACKLIST:
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try:
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module = __import__(modname, fromlist=interface)
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except ImportError:
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raise UnpackingError('Bad unpacker: %s' % modname)
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else:
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unpackers.append(module)
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return sorted(unpackers, key = lambda mod: mod.PRIORITY)
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UNPACKERS = getunpackers()
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def run(source, evalcode=False):
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"""Runs the applicable unpackers and return unpacked source as a string."""
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for unpacker in [mod for mod in UNPACKERS if mod.detect(source)]:
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source = unpacker.unpack(source)
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if evalcode and evalbased.detect(source):
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source = evalbased.unpack(source)
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return source
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def filtercomments(source):
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"""NOT USED: strips trailing comments and put them at the top."""
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trailing_comments = []
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comment = True
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while comment:
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if re.search(r'^\s*\/\*', source):
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comment = source[0, source.index('*/') + 2]
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elif re.search(r'^\s*\/\/', source):
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comment = re.search(r'^\s*\/\/', source).group(0)
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else:
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comment = None
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if comment:
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source = re.sub(r'^\s+', '', source[len(comment):])
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trailing_comments.append(comment)
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return '\n'.join(trailing_comments) + source
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