Wayback Machine Favicon Fixer

Attempts to add a favicon to a site crawled by the Wayback Machine in the event one does not come up normally

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          Wayback Machine Favicon Fixer
// @namespace     DoomTay
// @description   Attempts to add a favicon to a site crawled by the Wayback Machine in the event one does not come up normally
// @version       1.3.0
// @include       http://web.archive.org/web/*
// @include       http://wayback.archive.org/web/*
// @include       https://web.archive.org/web/*
// @include       https://wayback.archive.org/web/*
// @exclude       /\*/
// @grant         GM_addElement
// @noframes

// ==/UserScript==

var timestamp = /web\/(\d{1,14})/.exec(window.location.href)[1];

var originalDomain = /.+web\/\d+(?:[a-z][a-z]_)?\/((?:https?:\/\/)?[^\/]+)/.exec(window.location.href)[1];

if(!originalDomain.endsWith("/")) originalDomain = originalDomain + "/";

if(!document.querySelector("link[rel~='icon']") && document.contentType == "text/html") retrieveFavicon();

function retrieveFavicon()
{
	fetch("https://archive.org/wayback/available?url=" + encodeURIComponent(originalDomain + "favicon.ico") + "&timestamp=" + timestamp).then(result => result.json()).then(function(data)
	{
		if(data.archived_snapshots && data.archived_snapshots.closest && data.archived_snapshots.closest.available)
		{
			GM_addElement("link",
						  {type: "image/x-icon",
						  rel: "shortcut icon",
						  href: data.archived_snapshots.closest.url.replace("http:","https:").replace("/ht","mp_/ht")
			});
		}
	})
}