User:Quarl/alexafy.js
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![]() | Documentation for this user script can be added at User:Quarl/alexafy. |
// User:Quarl/alexafy.js - adds "alexa" links to external links
// requires addlilink.js, util.js
// quarl 2005-01-10 new AJAX version that annotates page asynchronously with rank
// I tried to create a version that automatically downloads the Alexa rank and annotates the page, but I think it's disallowed because it's not from the same domain. So it would be impossible without a server-side helper script on wiki.riteme.site.
// based on http://wiki.riteme.site/wiki/User:Matthewmayer/monobook.js
//add Alexafy link to toolbar
function addToolboxAlexafy() {
addToolboxLink('javascript:alexafyLinks()','Alexa-fy links','alexafyLinks')
}
function alexafyWhitelistedP(url) {
if (url.match(/wikipedia.org/)) return true;
return false;
}
function alexafyLinks() {
var content=document.getElementById('content');
var externallinks=getElementsByClass('external',content,'a');
for (i in externallinks) {
var alink=externallinks[i];
if (alexafyWhitelistedP(alink.href)) continue;
alexafy_asyncAnnotateLink(alink);
}
}
function alexafy_asyncAnnotateLink(alink) {
var alexaUrl = makeAlexaTrafficUrl(alink.href);
var dnode = document.createElement('span');
dnode.innerHTML = ' [<a href="'+alexaUrl+'">Alexa</a>]';
add_after(alink, dnode);
// XXX this doesn't work because of permissions. see top.
//alexafy_asyncGetRank(dnode,alexaUrl);
}
function makeAlexaTrafficUrl(url) {
return 'http://www.alexa.com/data/details/traffic_details?q=&url=' + url;
}
function alexafy_asyncGetRank(dnode, alexaUrl) {
var req = new XMLHttpRequest();
req.dnode = dnode;
// using onload instead of onreadystatechange allows multiple asynchronous requests
req.onload = alexafy_asyncReqCont;
req.open("GET", alexaUrl, true);
req.send(null);
}
function alexafy_asyncReqCont(event) {
req = event.target;
if (req.readyState!=4) return;
if (req.status == 200) {
if (req.responseText.match(/<span.*?Traffic Rank for\t*(.*?):<\/span><span.*?-->([0-9,]+)<\/span>/)) {
var domain = RegExp.$1;
var rank = RegExp.$2;
alexafy_annotateDoc(req.dnode, domain, rank);
return;
//<span class="body"> Traffic Rank for example.org:</span><span class="descBold"> <!--Did you know? Alexa offers this data programmatically. Visit http://webservices.amazon.com/ for more information about the Alexa Web Information Service.-->123,456</span>
}
if (req.responseText.match(/<span.*?Traffic Rank for.*?No Data/)) {
//<span class="body"> Traffic Rank for :</span> No Data<br>
alexafy_annotateDoc(req.dnode, null, 'No data');
return;
}
}
alexafy_annotateDoc(req.dnode, null, 'Error');
}
function alexafy_annotateDoc(dnode, domain, rank)
{
var msg;
if (rank == 'Error') {
msg = "couldn't get Alexa rank";
} else if (rank == 'No data') {
msg = "no traffic data";
} else {
msg = "traffic rank for "+domain+" is "+rank;
}
dnode.innerHTML = dnode.innerHTML.substr(0,dnode.innerHTML.length-1) + msg + "]";
}
addOnloadHook(addToolboxAlexafy);