corrade-nucleus-nucleons – Blame information for rev 4
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| Rev | Author | Line No. | Line |
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| 2 | office | 1 | # |
| 2 | # General code for JSBeautifier unpackers infrastructure. See README.specs |
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| 3 | # written by Stefano Sanfilippo <a.little.coder@gmail.com> |
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| 4 | # |
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| 5 | |||
| 6 | """General code for JSBeautifier unpackers infrastructure.""" |
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| 7 | |||
| 8 | import pkgutil |
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| 9 | import re |
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| 10 | from jsbeautifier.unpackers import evalbased |
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| 11 | |||
| 12 | # NOTE: AT THE MOMENT, IT IS DEACTIVATED FOR YOUR SECURITY: it runs js! |
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| 13 | BLACKLIST = ['jsbeautifier.unpackers.evalbased'] |
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| 14 | |||
| 15 | class UnpackingError(Exception): |
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| 16 | """Badly packed source or general error. Argument is a |
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| 17 | meaningful description.""" |
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| 18 | pass |
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| 19 | |||
| 20 | def getunpackers(): |
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| 21 | """Scans the unpackers dir, finds unpackers and add them to UNPACKERS list. |
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| 22 | An unpacker will be loaded only if it is a valid python module (name must |
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| 23 | adhere to naming conventions) and it is not blacklisted (i.e. inserted |
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| 24 | into BLACKLIST.""" |
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| 25 | path = __path__ |
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| 26 | prefix = __name__ + '.' |
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| 27 | unpackers = [] |
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| 28 | interface = ['unpack', 'detect', 'PRIORITY'] |
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| 29 | for _importer, modname, _ispkg in pkgutil.iter_modules(path, prefix): |
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| 30 | if 'tests' not in modname and modname not in BLACKLIST: |
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| 31 | try: |
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| 32 | module = __import__(modname, fromlist=interface) |
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| 33 | except ImportError: |
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| 34 | raise UnpackingError('Bad unpacker: %s' % modname) |
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| 35 | else: |
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| 36 | unpackers.append(module) |
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| 37 | |||
| 38 | return sorted(unpackers, key = lambda mod: mod.PRIORITY) |
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| 39 | |||
| 40 | UNPACKERS = getunpackers() |
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| 41 | |||
| 42 | def run(source, evalcode=False): |
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| 43 | """Runs the applicable unpackers and return unpacked source as a string.""" |
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| 44 | for unpacker in [mod for mod in UNPACKERS if mod.detect(source)]: |
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| 45 | source = unpacker.unpack(source) |
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| 46 | if evalcode and evalbased.detect(source): |
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| 47 | source = evalbased.unpack(source) |
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| 48 | return source |
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| 49 | |||
| 50 | def filtercomments(source): |
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| 51 | """NOT USED: strips trailing comments and put them at the top.""" |
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| 52 | trailing_comments = [] |
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| 53 | comment = True |
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| 54 | |||
| 55 | while comment: |
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| 56 | if re.search(r'^\s*\/\*', source): |
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| 57 | comment = source[0, source.index('*/') + 2] |
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| 58 | elif re.search(r'^\s*\/\/', source): |
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| 59 | comment = re.search(r'^\s*\/\/', source).group(0) |
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| 60 | else: |
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| 61 | comment = None |
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| 62 | |||
| 63 | if comment: |
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| 64 | source = re.sub(r'^\s+', '', source[len(comment):]) |
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| 65 | trailing_comments.append(comment) |
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| 66 | |||
| 67 | return '\n'.join(trailing_comments) + source |