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api: use req.ip instead of cloudflare headers, ratelimit ipv6 by prefix

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allows for more versatile configurations that do not necessarily have to use cloudflare

also ratelimits IPv6 addresses by prefix instead of individual addresses
currently set at /56, which should not be too strict
(yet allows a /48 holder to make 256 as many requests instead of 2^80 as many requests), change if needed
This commit is contained in:
dumbmoron 2023-07-25 19:46:25 +00:00 committed by dumbmoron
parent b4f11b047e
commit a375000ae9
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GPG key ID: C59997C76C6A8E5F
3 changed files with 16 additions and 3 deletions
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1
package.json
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@ -34,6 +34,7 @@
"express-rate-limit": "^6.3.0",
"ffmpeg-static": "^5.1.0",
"hls-parser": "^0.10.7",
"ipaddr.js": "2.1.0",
"nanoid": "^4.0.2",
"node-cache": "^5.1.2",
"psl": "1.9.0",

6
src/core/api.js
View file

@ -24,7 +24,7 @@ export function runAPI(express, app, gitCommit, gitBranch, __dirname) {
max: 20,
standardHeaders: true,
legacyHeaders: false,
keyGenerator: (req, res) => sha256(getIP(req), ipSalt),
keyGenerator: req => sha256(getIP(req), ipSalt),
handler: (req, res, next, opt) => {
return res.status(429).json({
"status": "rate-limit",
@ -37,7 +37,7 @@ export function runAPI(express, app, gitCommit, gitBranch, __dirname) {
max: 25,
standardHeaders: true,
legacyHeaders: false,
keyGenerator: (req, res) => sha256(getIP(req), ipSalt),
keyGenerator: req => sha256(getIP(req), ipSalt),
handler: (req, res, next, opt) => {
return res.status(429).json({
"status": "rate-limit",
@ -49,6 +49,8 @@ export function runAPI(express, app, gitCommit, gitBranch, __dirname) {
const startTime = new Date();
const startTimestamp = Math.floor(startTime.getTime());
app.set('trust proxy', ['loopback', 'uniquelocal']);
app.use('/api/:type', cors(corsConfig));
app.use('/api/json', apiLimiter);
app.use('/api/stream', apiLimiterStream);

12
src/modules/sub/utils.js
View file

@ -1,5 +1,6 @@
import { normalizeURL } from "../processing/url.js";
import { createStream } from "../stream/manage.js";
import ipaddr from "ipaddr.js";
const apiVar = {
allowed: {
@ -111,7 +112,16 @@ export function checkJSONPost(obj) {
}
}
export function getIP(req) {
return req.header('cf-connecting-ip') ? req.header('cf-connecting-ip') : req.ip;
const strippedIP = req.ip.replace(/^::ffff:/, '');
const ip = ipaddr.parse(strippedIP);
if (ip.kind() === 'ipv4')
return strippedIP;
const PREFIX = 56;
const v6Bytes = ip.toByteArray();
v6Bytes.fill(0, PREFIX / 8);
return ipaddr.fromByteArray(v6Bytes).toString();
}
export function cleanHTML(html) {
let clean = html.replace(/ {4}/g, '');