Intercepter

By Julián Romero — Last update Mar 4, 2008 — Installed 125 times. Daily Installs: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0 
// ==UserScript==
// @name           Intercepter
// @namespace      http://hacks.wuonm.com
// @description    Replace short and meaningless tinyurls with the domain of the actual web site using the preview feature.
// @include        http://twitter.com/*
// ==/UserScript==

const __re_redirecturl=/(.*<a id="redirecturl" href=")([^"]+)(">.*)/
const __chrome_data = 'data:image/gif,GIF89a%0D%00%07%00%C2%04%00%98%A8%94%A2%A6%92%B9%BC%AD%D2%D7%BF%FF%FF%FF%FF%FF%FF%FF%FF%FF%FF%FF%FF!%F9%04%01%00%00%04%00%2C%00%00%00%00%0D%00%07%00%00%03%1F8%12%2CC%04%40%22%26%0C%10H%82%AD%D5%1C4hd%D9y%99TY%1DH(L%E0dS%02%00%3B';

function getAnchorId(urlPrefix, n){return urlPrefix + "-" + n}

var urlPrefix = "tinyurl.com";
var xpath = "//a[contains(@href, 'http://" + urlPrefix + "')]";
var anchorList = document.evaluate(xpath, document, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
for (var jdx=0; jdx<anchorList.snapshotLength; jdx++){
    var anchor = anchorList.snapshotItem(jdx);
    if (anchor) {
        anchor.setAttribute("title", "Loading...");
        anchor.setAttribute("id", getAnchorId(urlPrefix, jdx));
        var uriParts = anchor.href.split("/")
        GM_xmlhttpRequest({
                 method: 'GET'
                ,url: "http://preview.tinyurl.com/" + uriParts[uriParts.length-1]
                ,onload: function(resp) {
                    anchor = document.getElementById(this.anchorId);
                    if (resp.status == 200) {
                        try {
                            var actualUrl = __re_redirecturl.exec(resp.responseText)[2];
                            anchor.setAttribute("href", actualUrl);
                            anchor.setAttribute("title", actualUrl);
                            /* FIXME use css + data: */
                            var chromeImg = document.createElement("IMG");
                            chromeImg.setAttribute("src", __chrome_data);
                            anchor.innerHTML = '&nbsp;' + actualUrl.split("/")[2];
                            anchor.parentNode.insertBefore(chromeImg, anchor);
                        }
                        catch(exc){
                            /* ignore errors */
                        }
                    }
                }
                ,anchorId: getAnchorId(urlPrefix, jdx)
            }
        );
    }
}