67 lines
2.1 KiB
Python
67 lines
2.1 KiB
Python
class Sandbox(object):
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# DO NOT REMOVE ANY ENTRY OF WHITE LIST
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# THIS ENTIES ARE USED FOR Sandbox.
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# (If sys.modules['__main__'] is changed, you can see the hell.)
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WHITE_LIST = ['__builtin__', 'types', __name__, '__main__', 'sys']
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def __init__(self, prevent_imported_modules = False, allowed_modules = [], prevented_modules = [], allowed_paths = []):
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self.prevent_imported_modules = prevent_imported_modules
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self.allowed_modules = allowed_modules
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self.prevented_modules = prevented_modules
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self.allowed_paths = allowed_paths
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def add_allowed_modules(self, allowed_modules):
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self.allowed_modules = self.allowed_modules + allowed_modules
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def add_prevented_modules(self, prevented_modules):
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self.prevented_modules = self.prevented_modules + prevented_modules
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def execfile(self, filename, dic):
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import sys
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import copy
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for allowed_module_name in self.allowed_modules:
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try:
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exec 'import {0}'.format(allowed_module_name)
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except:
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# Just now, pass the exception.
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# (filename could not use this module)
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sys.stderr.write("Could not import %s" % allowed_module_name)
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pass
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# shallow copy of sys.modules
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old_modules = copy.copy(sys.modules)
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old_path = sys.path
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sys.path = self.allowed_paths
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# set current imported modules None
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if self.prevent_imported_modules:
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import types
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for k, v in old_modules.items():
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if type(v) == types.ModuleType:
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if not (k in self.WHITE_LIST or k in self.allowed_modules):
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sys.modules[k] = None
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# set prevented modules None.
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for prevented_module_name in self.prevented_modules:
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sys.modules[prevented_module_name] = None
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try:
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f = open(filename, 'rb')
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data = f.read()
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code = compile(data, filename, 'exec')
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exec code in dic
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except Exception, e:
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sys.stderr.write(e)
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finally:
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# Restore original settings.
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#sys.modules = old_modules# <- This is not effective. I don't know why, but I guess some where got old sys.modules reference and access old one.
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for k, v in sys.modules.items():
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if not k in old_modules:
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del sys.modules[k]
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for k, v in old_modules.items():
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sys.modules[k] = v
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sys.path = old_path
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