Attempts to fix broken images by replacing them with working timestamps based on JSON results
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// ==UserScript==
// @name Wayback Machine Image Fixer
// @namespace DoomTay
// @description Attempts to fix broken images by replacing them with working timestamps based on JSON results
// @include http://web.archive.org/web/*
// @exclude http://web.archive.org/web/*.jpg
// @exclude http://web.archive.org/web/*.jpeg
// @exclude http://web.archive.org/web/*.png
// @exclude http://web.archive.org/web/*.gif
// @exclude http://web.archive.org/web/*.bmp
// @version 1.1.3
// @grant GM_xmlhttpRequest
// ==/UserScript==
var pics = document.images;
var timestamp = /web\/(\d{1,14})/.exec(window.location.href);
function replaceImage(target)
{
var originalURL = target.src.substring(target.src.lastIndexOf("http"));
var newURL = GM_xmlhttpRequest({
url: "http://archive.org/wayback/available?url=" + originalURL + "&closest=" + timestamp,
method: "GET",
headers: {"Accept": "application/json"},
onload: function(response) {
if (response.readyState == 4) {
if(response.status == 503)
{
//We caught a 503, which means that the API wasn't "ready" for us yet. Let's try again
replaceImage(target)
}
else if(JSON.parse(response.responseText).archived_snapshots.closest == null)
{
//Try and "expose" image links that are unclickable due to the image not loading
if(target.alt == "" && target.width == 0 && target.parentNode.nodeName == "A")
{
//Changing the source is pretty hacky, but it's the only way I can think of to turn "invisible" image links into something clickable
target.src = target.src.substring(target.src.lastIndexOf("http"));
target.width = 25;
target.height = 25;
}
return;
}
else target.src = JSON.parse(response.responseText)archived_snapshots.closest.url;
}
}
});
}
function evaluateImage(pic)
{
GM_xmlhttpRequest({
url: pic.src,
method: "HEAD",
onload: function(response) {
//Going off of response code is unreliable. Sometimes an image will return a status code of 200 even though it would redirect to an error page should you view the image directly, so we're looking at content type instead
if(response.responseHeaders.indexOf("Content-Type: text/html") > -1)
{
replaceImage(pic);
}
}
});
}
for(var i = 0; i < pics.length; i++)
{
//Skip over stuff related to the Wayback Machine toolbar and data URIs
if((document.getElementById("wm-ipp") && document.getElementById("wm-ipp").contains(pics[i])) || pics[i].src.indexOf("data:") > -1) continue;
evaluateImage(pics[i]);
}