AudioDownloadAPI/index.js

require("dotenv").config()
const express = require("express")
const codes = require("./codes.json");
const app = express()
const port = process.env.SERVER_PORT || 3000;
app.use(express.json());
app.set("trust proxy", 1);

app.use((req, res, next) => {
	console.log(`[${new Date().toLocaleString()}] ${req.ip} ${req.method} ${req.url}`);
	next();
})

var rateLimits = {};


app.get("/", (req, res) => {
	// load index
	res.sendFile(__dirname + "/static/index.html")
});


app.post("/", async (req, res) => {
	// Impliment a rate limit of 25 requests per minute
	const ip = req.ip;
	console.log(rateLimits[ip])
	if (!rateLimits[ip]) {
		rateLimits[ip] = {
			count: 0,
			lastRequest: Date.now()
		};
	}
	const limit = rateLimits[ip];
	const now = Date.now();
	if (now - limit.lastRequest > 60000) {
		limit.count = 0;
		limit.lastRequest = now;
	}
	if (limit.count >= 25) {
		return res.status(429).json({
			code: 429,
			error: "Rate limit exceeded",
			status: "error"
		});
	}
	limit.count++;

	// Validate request body
	if (!req.body.type || req.body.type !== "batching") {
		return res.status(400).json({
			error: "Invalid request type",
			status: "error"
		});
	}
	// Check that the body is valid json, if not throw an error



	if (!req.body.data || !Array.isArray(req.body.data)) {
		return res.status(400).json({
			error: "Invalid data format",
			status: "error"
		});
	}

	// Build the batch request body
	const batchRequests = req.body.data.map(item => {
		const assetId = item;

		if (!assetId) {
			return {
				assetId,
				requestId: assetId,
				status: "failure",
				url: "",
				additional: "Missing assetId."
			};
		}

		return {
			assetId,
			requestId: assetId
		};
	});

	// If body.cookie is provided, use it, else use process.env.COOKIE
	const cookie = req.body.cookie || process.env.COOKIE;

	const options = {
		method: 'POST',
		headers: {
			authority: 'assetdelivery.roblox.com',
			accept: '',
			'accept-language': 'en-US,en;q=0.9',
			'cache-control': 'no-cache',
			'content-type': 'application/json',
			origin: 'https://create.roblox.com',
			pragma: 'no-cache',
			referer: 'https://create.roblox.com/',
			'roblox-browser-asset-request': 'true',
			'roblox-place-id': '0',  // Use a default or placeholder value if needed
			'sec-ch-ua': '"Opera GX";v="105", "Chromium";v="119", "Not?A_Brand";v="24"',
			'sec-ch-ua-mobile': '?0',
			'sec-ch-ua-platform': '"Windows"',
			'sec-fetch-dest': 'empty',
			'sec-fetch-mode': 'cors',
			'sec-fetch-site': 'same-site',
			'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:130.0) Gecko/20100101 Firefox/130.0',
			Cookie: `.ROBLOSECURITY=${cookie};`
		},
		body: JSON.stringify(batchRequests)
	};

	try {
		let response = await fetch("https://assetdelivery.roblox.com/v1/assets/batch", options);
		let json = await response.json();
		//console.log(JSON.stringify(json, null, 2));
		// Build the response object
		const responses = req.body.data.reduce((acc, item, index) => {
			const assetId = item;
			if (json[index].errors) {
				const errorCode = json[index].errors[0].code;
				acc[assetId] = {
					status: "failure",
					code: errorCode,
					message: codes[errorCode].message,
					additional: codes[errorCode].description
				};
			} else if (json[index].assetTypeId !== 3) {
				// Return 415, the asset isnt audio
				acc[assetId] = {
					status: "failure",
					code: 415,
					message: codes[415].message,
					additional: codes[415].description
				};
			} else {
				acc[assetId] = {
					status: "success",
					url: json[index].location
				};
			}
			return acc;
		}, {});

		res.json({
			type: "batching-response",
			data: responses
		});

	} catch (error) {
		res.status(500).json({
			type: "batching-response",
			data: req.body.data.reduce((acc, item) => {
				acc[item] = {
					status: "failure",
					url: "",
					additional: "Request failed"
				};
				return acc;
			}, {})
		});
	}
});


app.listen(port, () => {
	console.log(`Listening on ${port}`);
});