Textbox as in-game code runner

[NeoBuilds]

@MeCrunchAstroX

Using code executors in your game can lead to your account possibly being banned

Do you mean server-sided executor, or just client-sided?

[robloxjw02 (TheRaven)]

@eaterofananas8

local LogService = game:GetService("LogService")

local function compare(table1, table2)
	local table1Length = #table1
	local table2Length = #table2

	local differences = {}

	for i, v in ipairs(table1) do
		if table1Length > table2Length then
			if i > table2Length then
				table.insert(differences, v)
			end
		end
	end

	return differences
end

local loadstr = loadstring(Text)
local historyLog1 = LogService:GetLogHistory()

loadstr()

local historyLog2 = LogService:GetLogHistory()
local result = compare(historyLog2, historyLog1)

for _, message in ipairs(result) do
	local TextLabel = game.ReplicatedStorage.Output:Clone()
	TextLabel.Text = message.Message
	TextLabel.Parent = Player.PlayerGui.NC.Output.ScrollingFrame
end

No it’s already until my last comment, I use LuaVM and loadstring as testing, with LogService Message Out I can print the log service but it’s like on video. Well but with GetLogHistory() i don’t know how, because I use @eaterofananas8 code but it doesn’t clone the textlabel, just look to my video thank you.

[NeoBuilds]

Why use GetLogHistory if you can connect the MessageOut event?

[robloxjw02 (TheRaven)]

It always duplicate… that’s why look my video.

[NeoBuilds]

It only duplicates in Studio

[robloxjw02 (TheRaven)]

Oh only on studio? So if in-game it’s not gonna duplicate?

[NeoBuilds]

Yes.

[robloxjw02 (TheRaven)]

is there a way that studio also doesn’t duplicate?

[NeoBuilds]

It is a bug.

@Noble_Draconian

In studio, it fires for the wrong contexts. Server and client get all messages from any context, when they should only get messages from their own context.

[Eestlane771]

Why do you bind to LogService?

You should replace print with another function that adds a line of text to the output GUI.

I’m not 100% sure how to do it and I can’t verify it, but your options are:

1. Use setfenv to replace the loaded function’s environment with one that contains a different print function;
2. Prepend code to the function that replaces print with something else before the user’s code runs.

[robloxjw02 (TheRaven)]

What??? How to do it… hmm? I don’t know what do you mean.

[coolalex1835 (Waltuh)]

So is this just a virtial script interface?

[Eestlane771]

Both of these options are a billion trillion times simpler and more reliable than whatever you were doing above this.

Normally print() will output a message to the log, which you can get with LogService.
I suggested replacing print with something that outputs to the GUI directly instead of the log.
e.g.

function print(...)
	local messages = {...}
	-- convert each argument to string
	for i, message in ipairs(messages) do
		messages[i] = tostring(message)
	end
	-- show the result in a textlabel
	local TextLabel = game.ReplicatedStorage.Output:Clone()
	TextLabel.Text = table.concat(messages, "\t")
	TextLabel.Parent = Player.PlayerGui.NC.Output.ScrollingFrame
end

The first option was to replace the environment of the function.

local env = {
	print = print, -- the print function from above
	Player = Player, -- the player that ran this code
	game = game, -- you'll have to add a LOT of stuff here
}

local func = loadstring(YOUR_CODE_HERE)
setfenv(func, env)
func()

The second option was to add code that runs before your user’s code.
This is a lot less reliable, though. In fact, it’s very poor form, but still better than reading the console.

local preamble = [[
local Player = ]] .. Player:GetFullName() .. [[

function print(...)
	local messages = {...}
	-- convert each argument to string
	for i, message in ipairs(messages) do
		messages[i] = tostring(message)
	end
	-- show the result in a textlabel
	local TextLabel = game.ReplicatedStorage.Output:Clone()
	TextLabel.Text = table.concat(messages, "\t")
	TextLabel.Parent = Player.PlayerGui.NC.Output.ScrollingFrame
end

]]

local func = loadstring(preamble .. YOUR_CODE_HERE)
func()

[robloxjw02 (TheRaven)]

Well is like roblox studio command bar or script runner but in-game.

[robloxjw02 (TheRaven)]

How to use the first option tho?

[robloxjw02 (TheRaven)]

I know the point of option 2, but like you said it’s less reliable as option 1. So how to use option 1?

[robloxjw02 (TheRaven)]

@Eestlane771

local preamble = [[
local Player = ]] .. Player:GetFullName() .. [[

function print(...)
	local messages = {...}
	-- convert each argument to string
	for i, message in ipairs(messages) do
		messages[i] = tostring(message)
	end
	-- show the result in a textlabel
	local TextLabel = game.ReplicatedStorage.Output:Clone()
	TextLabel.Text = table.concat(messages, "\t")
	TextLabel.Parent = Player.PlayerGui.NC.Output.ScrollingFrame
end

]]

local func = loadstring(preamble .. YOUR_CODE_HERE)
func()

But second option I try and it says attempt to index nil with robloxjw02 ← my username

[Eestlane771]

That’s what I meant by ‘less reliable’. It’s generating code that tries and fails to get game.Players.

How to use the first option tho?

You just use setfenv(func, environment) to change the environment of a function to another table.

How would I use setfenv on a function?

getfenv gets a function’s environment. You just need to pass the table setfenv(start, { msg = "hello" }) If you’re asking for real-world use cases, one would be sandboxing. Though do note that using setfenv and getfenv disable some of Luau’s optimizations, so I recommend against it now.

has an example of this.

I’m not sure how you couldn’t get the first one to work if you could make the second one run and show an error.

[robloxjw02 (TheRaven)]

local RemoteEvent = game.ReplicatedStorage.Test

--local Modules = game.ReplicatedStorage.Loadstring

--local LogService = game:GetService("LogService")

local Players = game:GetService("Players")

RemoteEvent.OnServerEvent:Connect(function(Player, Text)

local preamble = [[

local preamble = [[

local Player = ]] .. Player:GetFullName() .. [[

function print(...)

local messages = {...}

-- convert each argument to string

for i, message in ipairs(messages) do

messages[i] = tostring(message)

end

-- show the result in a textlabel

local TextLabel = game.ReplicatedStorage.Output:Clone()

TextLabel.Text = table.concat(messages, "\t")

TextLabel.Parent = Player.PlayerGui.NC.Output.ScrollingFrame

end

]]

local func = loadstring(preamble..Text)

func()

end)

This is my code now using your second option.

[robloxjw02 (TheRaven)]

@Eestlane771

function print(...)
	local messages = {...}
	-- convert each argument to string
	for i, message in ipairs(messages) do
		messages[i] = tostring(message)
	end
	-- show the result in a textlabel
	local TextLabel = game.ReplicatedStorage.Output:Clone()
	TextLabel.Text = table.concat(messages, "\t")
	TextLabel.Parent = Player.PlayerGui.NC.Output.ScrollingFrame
end

If i use the first option, where should i put the function print(…), inside ServerEvent or outside?