server.js

const express = require("express");
const path = require("path");
const { get } = require("request");

const app = express();

app.use(express.json());
app.use(express.urlencoded({ extended: true }));

const viewsDir = path.join(__dirname, "views");
app.use(express.static(viewsDir));
app.use(express.static(path.join(__dirname, "./public")));
app.use(express.static(path.join(__dirname, "./images")));
app.use(express.static(path.join(__dirname, "./weights")));
app.use(express.static(path.join(__dirname, "./dist")));

app.get("/", (req, res) => res.redirect("/mask_on_profile"));
app.get("/mask_on_profile", (req, res) =>
	res.sendFile(path.join(viewsDir, "maskOnProfile.html"))
);
app.get("/badge", (req, res) =>
	res.sendFile(path.join(viewsDir, "badge.html"))
);

app.post("/fetch_external_image", async (req, res) => {
	const { imageUrl } = req.body;
	if (!imageUrl) {
		return res.status(400).send("imageUrl param required");
	}
	try {
		const externalResponse = await request(imageUrl);
		res.set("content-type", externalResponse.headers["content-type"]);
		return res.status(202).send(Buffer.from(externalResponse.body));
	} catch (err) {
		return res.status(404).send(err.toString());
	}
});

var port = process.env.PORT || 3000;
app.listen(port, () => console.log("Listening on port " + port));

function request(url, returnBuffer = true, timeout = 10000) {
	return new Promise(function (resolve, reject) {
		const options = Object.assign(
			{},
			{
				url,
				isBuffer: true,
				timeout,
				headers: {
					"User-Agent":
						"Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36",
				},
			},
			returnBuffer ? { encoding: null } : {}
		);

		get(options, function (err, res) {
			if (err) return reject(err);
			return resolve(res);
		});
	});
}