index.js

var express = require("express");
var app = express();
var server = require('http').Server(app);
server.listen(9003);

app.get("*", function(req, res, next) {
	var url = req.path.substr(1);
	if(url.startsWith("https://cdn.frankerfacez.com/emoticon/") || url.startsWith("https://cdn.betterttv.net/emote/")) {
		console.log("Getting url "+req.path);
		require('request').get(url).pipe(res);
	} else {
		res.status(403).end("403 Forbidden");
	}
});