Automatic Redlib Quota & Error Redirector

Automatically redirects to another Redlib (previously Libreddit) instance if the one you're directed to has reached its rate limit/quota or has an error.

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         Automatic Redlib Quota & Error Redirector
// @namespace    happyviking
// @version      1.69.0
// @grant        none
// @run-at       document-end
// @license      MIT
// @description  Automatically redirects to another Redlib (previously Libreddit) instance if the one you're directed to has reached its rate limit/quota or has an error.
// @icon         https://gitlab.com/uploads/-/system/project/avatar/32545239/libreddit.png
// @author       HappyViking

// <<INSTANCES START HERE>>
// @match https://libreddit.diffraction.dev/*
// @match https://libreddit.privacydev.net/*
// @match https://red.artemislena.eu/*
// @match https://reddit.adminforge.de/*
// @match https://reddit.nerdvpn.de/*
// @match https://reddit.rtrace.io/*
// @match https://redlib.catsarch.com/*
// @match https://redlib.minihoot.site/*
// @match https://redlib.orangenet.cc/*
// @match https://redlib.perennialte.ch/*
// @match https://redlib.privacyredirect.com/*
// @match https://redlib.privadency.com/*
// @match https://redlib.r4fo.com/*
// @match https://redlib.thebunny.zone/*
// @match https://rl.blitzw.in/*
// @match https://safereddit.com/*
// @match https://red.ngn.tf/*
// @match https://redlib.scanash.xyz/*
// @match https://rl.bloat.cat/*
// @match https://redlib.4o1x5.dev/*
// @match https://eu.safereddit.com/*
// @match https://lr.ptr.moe/*
// @match https://redlib.nadeko.net/*
// @match https://redlib.tux.pizza/*
// @match https://l.opnxng.com/*
// @match https://libreddit.bus-hit.me/*
// @match https://libreddit.projectsegfau.lt/*
// @match https://lr.ggtyler.dev/*
// @match https://lr.n8pjl.ca/*
// @match https://r.darrennathanael.com/*
// @match https://red.arancia.click/*
// @match https://redlib.baczek.me/*
// @match https://redlib.ducks.party/*
// @match https://redlib.freedit.eu/*
// @match https://redlib.frontendfriendly.xyz/*
// @match https://redlib.incogniweb.net/*
// @match https://redlib.nirn.quest/*
// @match https://redlib.nohost.network/*
// @match https://redlib.privacy.com.de/*
// @match https://redlib.private.coffee/*
// @match https://redlib.reallyaweso.me/*
// @match https://redlib.seasi.dev/*
// @match https://redlib.vimmer.dev/*
// @match https://rl.rootdo.com/*
// @match https://lr.quitaxd.online/*
// @match https://redlib.nezumi.party/*
// @match https://redlib.kittywi.re/*
// @match https://reddit.idevicehacked.com/*
// @match https://redlib.privacy.deals/*
// @match https://reddit.owo.si/*
// @match https://redlib.dnfetheus.xyz/*
// @match https://libreddit.eu.org/*
// @match https://reddit.invak.id/*
// @match https://redlib.cow.rip/*
// @match https://redlib.xn--hackerhhle-kcb.org/*
// @match https://redlib.matthew.science/*
// @match https://libreddit.freedit.eu/*
// @match https://libreddit.hu/*
// @match https://libreddit.kylrth.com/*
// @match https://libreddit.lunar.icu/*
// @match https://libreddit.mha.fi/*
// @match https://libreddit.northboot.xyz/*
// @match https://libreddit.oxymagnesium.com/*
// @match https://libreddit.pussthecat.org/*
// @match https://libreddit.spike.codes/*
// @match https://libreddit.strongthany.cc/*
// @match https://libreddit.tiekoetter.com/*
// @match https://lr.4201337.xyz/*
// @match https://lr.aeong.one/*
// @match https://lr.artemislena.eu/*
// @match https://lr.slipfox.xyz/*
// @match https://r.walkx.fyi/*
// @match https://reddit.simo.sh/*
// @match https://reddit.smnz.de/*
// @match https://reddit.utsav2.dev/*
// @match https://snoo.habedieeh.re/*
// @match https://libreddit.kutay.dev/*
// @match https://libreddit.tux.pizza/*
// @match https://lr.vern.cc/*
// @match https://r.darklab.sh/*
// @match https://reddit.leptons.xyz/*
// @match https://discuss.whatever.social/*
// @match https://libreddit.kavin.rocks/*
// @match https://libreddit.cachyos.org/*
// @match https://libreddit.domain.glass/*
// @match https://libreddit.privacy.com.de/*
// @match https://reddit.baby/*
// <<INSTANCES END HERE>>

// ==/UserScript==

const checkForUnexpectedPage = () => {
    const isInNormalPage = !!document.querySelector('nav');
    const isInAnubis = !!document.getElementById("anubis_version")
    const isMediaPreviewPage = window.location.pathname.includes("preview") || window.location.pathname.includes("img")
    const isCloudflarePage = document.title.includes('Just a moment') ||
        document.querySelector('#challenge-running') !== null;

    if (!isInAnubis && !isCloudflarePage && !isInNormalPage && !isMediaPreviewPage) {
        return {
            element: document.body,
            pathname: window.location.pathname,
            search: window.location.search
        }
    }

    if (window.location.pathname.includes(".within.website")) {
        const urlObj = new URL(window.location.toString());
        const redir = urlObj.searchParams.get('redir');
        if (!redir) return false
        const decodedRedir = decodeURIComponent(redir);
        const redirUrl = new URL(decodedRedir);
        return {
            element: document.body,
            pathname: redirUrl.pathname,
            search: redirUrl.search
        }
    }

    return null
}

const checkForRedlibError = () => {
    const errorElement = document.getElementById("error")
    if (!errorElement) return false;
    const errorMessage = errorElement.querySelector("h1")?.innerHTML
    if (!errorMessage) return false;

    const message = errorMessage.toLowerCase()

    const hasError =
        message.includes("too many requests") ||
        message.includes("failed to parse page json data") ||
        message.includes("rate limit")

    if (hasError) {
        return {
            element: errorElement,
            pathname: window.location.pathname,
            search: window.location.search
        }
    }

    return null
}

// Probably isn't needed because of checkForUnexpectedPage now
const checkForNginxError = () => {
    const errorElement = document.getElementsByTagName("h1").item(0)
    if (!errorElement) return false

    const hasError = errorElement.innerHTML === "502 Bad Gateway" ||
        errorElement.innerHTML === "503 Service Temporarily Unavailable"

    if (hasError) {
        return {
            element: errorElement,
            pathname: window.location.pathname,
            search: window.location.search
        }
    }
    return null
}

function main() {
    const errorInfo = checkForUnexpectedPage() ?? checkForNginxError() ?? checkForRedlibError()
    if (errorInfo) {
        const element = errorInfo.element
        const addedMessage = document.createElement("p")
        addedMessage.textContent = "Redirecting you to new instance..."
        element.appendChild(addedMessage)
        location.replace('https://farside.link/redlib/' + errorInfo.pathname + errorInfo.search);
    }
}

main()