Revert 37560 20260209 vulnerability fix

[derrickaw]

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Summary of Changes

Hello @derrickaw, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request reverts a previous vulnerability fix by replacing the pythonmonkey library with js2py for handling JavaScript mapping functions in Beam's YAML module. This change aims to resolve compatibility issues, particularly for Python 3.12 and newer versions, where pythonmonkey proved problematic. The update involves refactoring the JavaScript execution logic, adjusting dependencies, and updating associated tests. Additionally, a minor cleanup was performed in the standard_io.yaml schema.

Highlights

• JavaScript Engine Replacement: The pythonmonkey library has been replaced with js2py for executing JavaScript mapping functions within Beam's YAML module. This change addresses compatibility issues and aims to improve stability.
• Python 3.12+ Compatibility: A version constraint for js2py has been introduced, limiting its use to Python versions less than 3.12, as js2py is not supported on Python 3.12 and later.
• Dependency and Test Updates: The setup.py file was updated to include js2py as a dependency, and related test files were modified to reflect the switch from pythonmonkey to js2py for JavaScript UDFs.
• YAML Schema Adjustment: The num_shards parameter was removed from the WriteToJson transform definition in standard_io.yaml.

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Changelog

• sdks/python/apache_beam/yaml/standard_io.yaml
  • Removed the 'num_shards' parameter from the 'WriteToJson' transform definition.
• sdks/python/apache_beam/yaml/yaml_mapping.py
  • Removed imports for 'atexit', 'importlib', 'os', 'queue', 'sys', 'threading', and 'uuid' which were related to 'pythonmonkey'.
  • Removed the 'PythonMonkeyDispatcher' class and its associated logic for managing JavaScript execution in a separate thread.
  • Removed the 'JavaScriptCallable' class, which previously wrapped 'pythonmonkey' functionality.
  • Added conditional imports for 'js2py' and 'JsObjectWrapper' to handle cases where 'js2py' might not be installed.
  • Introduced a '_CustomJsObjectWrapper' class to provide proper pickling support for 'js2py' objects.
  • Rewrote the '_expand_javascript_mapping_func' function to use 'js2py' for evaluating JavaScript expressions, callables, and files.
  • Implemented '_js_object_to_py_object' to convert 'js2py' objects into native Python types.
• sdks/python/apache_beam/yaml/yaml_udf_test.py
  • Removed the 'importlib' import, as it was no longer needed for 'pythonmonkey' checks.
  • Replaced checks for 'pythonmonkey' availability ('pm_available') with checks for 'js2py' availability.
  • Updated '@unittest.skipIf' decorators to skip JavaScript UDF tests if 'js2py' is not installed.
• sdks/python/setup.py
  • Added 'js2py>=0.74,<1' as a new dependency for the Python SDK, specifically constrained to 'python_version<"3.12"'.

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