Bypasses the derefer link interstitial for external links on 4chan
目前為
// ==UserScript==
// @name 4chan bypass derefer link interstitial
// @namespace b3vwq7gg90yplbelsnvz
// @match https://boards.4chan.org/*
// @match https://boards.4channel.org/*
// @match https://sys.4chan.org/derefer
// @match https://sys.4channel.org/derefer
// @grant none
// @version 1.0
// @description Bypasses the derefer link interstitial for external links on 4chan
// @run-at document-start
// @insert-into content
// @license MIT
// ==/UserScript==
(function () {
"use strict";
if (location.hostname.startsWith("sys.4chan")) {
// Derefer page (somehow), redirect immediately
const real = new URL(new URLSearchParams(location.search).get("url"));
if (real && (real.protocol === "https:" || real.protocol === "http:")) {
const link = document.createElement("a");
link.rel = "noopener";
link.referrerPolicy = "no-referrer";
// Hack fix: 4chan fucks up by double-encoding ampersands
link.href = String(real).replaceAll("&", "&");
link.click();
}
} else {
// Board page, fix linkified links
const dereferLink = "//" + location.host.replace("boards.4chan", "sys.4chan") + "/derefer?url=";
const derefSelector = `a.linkified[href^="${dereferLink}"]`;
document.addEventListener("4chanParsingDone", (ev) => {
const tid = ev.detail?.threadId;
let context;
if (tid) {
context = document.getElementById(`t${tid}`);
}
// If we don't find the thread for some reason,
// just scan the entire page instead idk
if (!context) {
context = document.body;
}
for (const link of context.querySelectorAll(derefSelector)) {
let real;
try {
// Throws if invalid URL.
// Use textContent instead of the url parameter
// because that might have double encoded ampersands
real = new URL(link.textContent);
} catch {
continue;
}
if (real.protocol === "https:" || real.protocol === "http:") {
link.relList.add("noopener");
link.referrerPolicy = "no-referrer";
link.href = real;
}
}
});
}
})();