mirror of
https://gitlab.com/octospacc/WinDog.git
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44 lines
2.1 KiB
Python
44 lines
2.1 KiB
Python
# ================================== #
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# WinDog multi-purpose chatbot #
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# Licensed under AGPLv3 by OctoSpacc #
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# ================================== #
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luaCycleLimit = 10000
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luaMemoryLimit = (512 * 1024) # 512 KB
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luaCrashMessage = f"Script has been forcefully terminated due to having exceeded the max cycle count limit ({luaCycleLimit})."
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# Use specific Lua version; always using the latest is risky due to possible new APIs and using JIT is vulnerable
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from lupa.lua54 import LuaRuntime as NewLuaRuntime, LuaError, LuaSyntaxError
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def luaAttributeFilter(obj, attr_name, is_setting):
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raise AttributeError("Access Denied.")
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# TODO make print behave the same as normal Lua, and expose a function for printing without newlines
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def cLua(context, data=None) -> None:
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scriptText = (data.Body or (data.Quoted and data.Quoted.Body))
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if not scriptText:
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return SendMsg(context, {"Text": "You must provide some Lua code to execute."})
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luaRuntime = NewLuaRuntime(max_memory=luaMemoryLimit, register_eval=False, register_builtins=False, attribute_filter=luaAttributeFilter)
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luaRuntime.eval(f"""(function()
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_windog = {{ stdout = "" }}
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function print (text, endl) _windog.stdout = _windog.stdout .. tostring(text) .. (endl ~= false and "\\n" or "") end
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function luaCrashHandler () return error("{luaCrashMessage}") end
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debug.sethook(luaCrashHandler, "", {luaCycleLimit})
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end)()""")
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for key in luaRuntime.globals():
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if key not in ["error", "assert", "math", "string", "tostring", "print", "_windog"]:
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del luaRuntime.globals()[key]
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try:
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textOutput = ("[ʟᴜᴀ ꜱᴛᴅᴏᴜᴛ]\n\n" + luaRuntime.eval(f"""(function()
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_windog.scriptout = (function()\n{scriptText}\nend)()
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return _windog.stdout .. (_windog.scriptout or '')
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end)()"""))
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except (LuaError, LuaSyntaxError) as error:
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Log(textOutput := ("Lua Error: " + str(error)))
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SendMsg(context, {"TextPlain": textOutput})
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RegisterModule(name="Scripting", group="Geek", summary="Tools for programming the bot and expanding its features.", endpoints={
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"Lua": CreateEndpoint(["lua"], summary="Execute a Lua snippet and get its output.", handler=cLua),
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})
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