03e3ebe021
Currently the only Javascript implentation supported by the std.javascript action is PyV8, a project that has been abandoned for about two years and can only be compiled with an outdated version of V8, one affected by several security vulnerabilities. This change adds support for v8eval, a more recent interface to V8 that is still being maintained. Change-Id: Id9cb89ffb05b37ef525a6085d49229de63420bbf
71 lines
2.0 KiB
Python
71 lines
2.0 KiB
Python
# Copyright 2015 - Mirantis, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import abc
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import json
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from oslo_config import cfg
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from oslo_utils import importutils
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from mistral import exceptions as exc
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CONF = cfg.CONF
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_PYV8 = importutils.try_import('PyV8')
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_V8EVAL = importutils.try_import('v8eval')
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class JSEvaluator(object):
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@classmethod
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@abc.abstractmethod
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def evaluate(cls, script, context):
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"""Executes given JavaScript."""
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pass
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class PyV8Evaluator(JSEvaluator):
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@classmethod
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def evaluate(cls, script, context):
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if not _PYV8:
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raise exc.MistralException(
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"PyV8 module is not available. Please install PyV8."
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)
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with _PYV8.JSContext() as ctx:
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# Prepare data context and way for interaction with it.
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ctx.eval('$ = %s' % json.dumps(context))
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result = ctx.eval(script)
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return _PYV8.convert(result)
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class V8EvalEvaluator(JSEvaluator):
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@classmethod
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def evaluate(cls, script, context):
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if not _V8EVAL:
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raise exc.MistralException(
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"v8eval module is not available. Please install v8eval."
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)
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v8 = _V8EVAL.V8()
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return v8.eval(('$ = %s; %s' % (json.dumps(context), script)).encode(
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encoding='UTF-8'))
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EVALUATOR = (V8EvalEvaluator if CONF.js_implementation == 'v8eval'
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else PyV8Evaluator)
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def evaluate(script, context):
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return EVALUATOR.evaluate(script, context)
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