Obfuscation of the python code

[shallyyy]

handin-system-ul/script_download_server.py

Line 190 in f9c42df

"""write content to handin.py file"""

Once you've finished up with creating and modyfing the handin.py file it's probably best to add a layer of obfuscation. Essentially it means to make the code unreadable to users. Python has a built in compiler to byte-code:
python -OO -m py_compile handin.py

This produces a .pyo file that contains byte-code, and where docstrings are removed, etc. You can rename the .pyo file with a .py extension, and handin.py runs like your program but does not contain your source code. This is likely enough to deter any students that get their hands on the handin.py file from figuring out how to break the system.

However this isn't 100% safe, https://github.com/Mysterie/uncompyle2 is a tool that can recover lots of the code and names so this should just be the first safety net.

Could you point me to where the application runs grading?

[naichuan-zhang]

handin-system-ul/system_server.py

Line 307 in f9c42df

def getExecResult(name, sock):

Here is where the grading logic starts.