redirects imgur <img> tags via a proxy
// ==UserScript==
// @name imgur proxy
// @namespace http://tampermonkey.net/
// @version 1
// @description redirects imgur <img> tags via a proxy
// @author FatCatTuxedo
// @match *://*/*
// @license MIT
// @icon https://www.google.com/s2/favicons?sz=64&domain=imgur.com
// ==/UserScript==
// based on:
//Imgur to Rimgo redirect v0.1.4 by 0b9
//https://gist.github.com/wont-work/e1f00fcc6c44b05a312573379b649afa#file-free-overjoyed-anywhere-you-go-user-js by kopper
(function() {
'use strict';
const observer = new MutationObserver((mutations) => {
for (const mutation of mutations) {
for (const node of mutation.addedNodes) {
walk(node);
}
}
});
/**
* @param {Node} root
*/
function walk(root) {
if (!root.ownerDocument) throw "assertion falied: no owner document";
const walker = root.ownerDocument.createNodeIterator(
root,
NodeFilter.SHOW_ELEMENT,
(node) => {
if (node.nodeType == Node.ELEMENT_NODE && node.shadowRoot) {return NodeFilter.FILTER_ACCEPT};
if (node.nodeName == "STYLE" || node.nodeName == "SCRIPT") {return NodeFilter.FILTER_REJECT};
if (node.nodeName == "IMG"){return NodeFilter.FILTER_ACCEPT};
return NodeFilter.FILTER_SKIP;
});
/** @type {Node|null} */let node;
node = walker.nextNode();
while ((node = walker.nextNode())) {
if (node.shadowRoot) {
for (const child of node.shadowRoot.children) {
if (child.nodeName == "STYLE" || child.nodeName == "SCRIPT") continue;
walk(child);
}
observer.observe(node.shadowRoot, observerConfig);
continue;
};
if (!node.nodeName == "IMG") continue;
redirectImg(node);
}
}
const observerConfig = {
childList: true,
subtree: true,
};
const redirectImg = (elem) => {
const imgsrc = elem.src
if (/https?:\/\/(\w+\.)?imgur.com\/(\w*)+(\.[a-zA-Z]{3,4})/.test(imgsrc)){
//elem.src = newUrl;
elem.src = "https://proxy.duckduckgo.com/iu/?u=" + imgsrc;
};
};
try {
walk(document.body)
observer.observe(document.body, observerConfig);
} catch (e) {
console.error("JSON parsing failed, no image redirecting will occur.", e);
}
})();