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Hooking function calls in Python code with Jython library

Andreas Pax Lück
Posts: 18
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Hi friends.

I'm using the Jython library in my Java project in order to provide Python code execution.

I'd like to restrict access to specific Java classes/packages as well as invocations of Jython's built-in functions.

I implemented an own class loader and set it in Jyhton interpreter:

But the Jython library also provides Python's built-in functions that aren't implemented as Java code, so I cannot catch them with the custom class loader. Here's a list with those supported functions: Built-in functions

How can I detect disallowed function invocations (for example: open(filename[, mode[, bufsize]])) in Pyhton user code? Is there any special hooking mechanism that can be used during code parsing or execution?

I reversed some Jython classes and searched for any possibility but its intrinsic processes aren't very easy to understand.


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