There are 4 previous versions of this script.
// ==UserScript==
// @name User Script Updates
// @namespace http://userscripts.org/people/336
// @description Sample code for automatic updating of a user script.
// @source http://userscripts.org/scripts/show/2296
// @identifier http://userscripts.org/scripts/source/2296.user.js
// @version 0.4.3
// @date 2012-01-02
// @creator Richard Gibson <@gmail.com>; http://twitter.com/gibson042
// @include *
// ==/UserScript==
//
// **COPYRIGHT NOTICE**
//
// I, Richard Gibson, hereby establish my original authorship of this
// work, and announce its release into the public domain. I claim no
// exclusive copyrights to it, and will neither pursue myself (nor
// condone pursuit by others of) punishment, retribution, or forced
// payment for its full or partial reproduction in any form.
//
// That being said, I would like to receive credit for this work
// whenever it, or any part thereof, is reproduced or incorporated into
// another creation; and would also like compensation whenever revenue
// is derived from such reproduction or inclusion. At the very least,
// please let me know if you find this work useful or enjoyable, and
// contact me with any comments or criticisms regarding it.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
//
// **END COPYRIGHT NOTICE**
//
//
// Changelog:
// 0.4.3 (2012-01-02)
// Updated: Google Chrome support
// 0.4.2 (2011-02-21)
// Fixed: Firefox/Windows security bug
// 0.4.1 (2011-02-19)
// UPDATED: update checking with meta.js
// 0.4 (2010-03-08)
// New: Script reboot; 100% new code and demonstrative functionality only
(function(){
// constants
var SCRIPT = {
name: "User Script Updates"
,namespace: "http://userscripts.org/people/336"
,source: "http://userscripts.org" // script homepage/description URL
+ "/scripts/show/2296"
,identifier: "http://userscripts.org" // script URL
+ "/scripts/source/2296.user.js"
,meta: "http://userscripts.org" // metadata URL
+ "/scripts/source/2296.meta.js"
,version: "0.0" // version (for example purposes, always disagrees with server)
,date: "2012-01-02" // update date
};
// test for dependencies
var UPDATE = SCRIPT.namespace + ' ' + SCRIPT.identifier;
try {
GM_setValue(UPDATE, 1);
if (GM_getValue(UPDATE)) {
UPDATE = {key: UPDATE, get: GM_getValue, set: GM_setValue};
}
else {
throw {};
}
}
catch(x){
UPDATE = {
set: function(key, value){ try{ localStorage.setItem(key, value); }catch(x){} }
,get: function(key, varDefault) {
try {
var stored = localStorage.getItem(key);
if(stored===null){ return varDefault; }
return stored;
}
catch(x) {
return varDefault;
}
}
};
}
UPDATE = {
SCRIPT: SCRIPT
,defaults: {checkDays: 3, version: SCRIPT.version, date: SCRIPT.date, name: SCRIPT.name,
lastCheck: typeof(GM_xmlhttpRequest)!='undefined' ? 0 : (new Date()).getTime()}
,getValue: UPDATE.get
,setValue: UPDATE.set
,HttpRequest: (typeof(GM_xmlhttpRequest)!='undefined' && GM_xmlhttpRequest) || function(){}
,ready: false
,init: function() {
if(this.ready){ return; }
this.ready = true;
for (var name in this.defaults) {
if(name in this){ delete this.defaults[name]; }
else{ this[name] = this.getValue('_UPDATE_' + name, this.defaults[name]); }
}
for (var p in {checkDays:0, lastCheck:0}) { delete this.defaults[p]; }
}
,check: function(fnOnNewer, fnIsNewer, blnForce) {
this.init();
var interval = Math.max(parseFloat(this.checkDays) * 24 * 60 * 60 * 1000, 0) || Infinity;
var diff = (new Date()) - parseInt(this.lastCheck,10);
if(!blnForce && !this.isNewer(this, this.SCRIPT, fnIsNewer) && !(diff > interval)){ return false; }
if (blnForce || (diff > interval)) {
var t = this;
return this.HttpRequest({method: 'GET', url: this.SCRIPT.meta || this.SCRIPT.identifier, onload: function(r){
t.setValue('_UPDATE_' + 'lastCheck', t.lastCheck = '' + (new Date()).getTime());
t.parse(r.responseText, [fnOnNewer, fnIsNewer, false]);
}});
}
try{ fnOnNewer(this, this.SCRIPT); }catch(x){}
}
,parse: function(strResponse, arrCheckArgs) {
var re = /\/\/\s*(?:@(\S+)\s+(.*?)\s*(?:$|\n)|(==\/UserScript==))/gm, match = true, name;
while (match && (match = re.exec(strResponse))) {
if(match[3]){ match = null; continue; }
name = match[1];
if(name in this.defaults){ this.setValue('_UPDATE_' + name, this[name] = match[2]); }
}
this.check.apply(this, arrCheckArgs || []);
}
,isNewer: function(objUpdate, objScript, fnIsNewer) {
if(!objUpdate){ objUpdate = this; }
if(!objScript || (objUpdate.date > objScript.date)){ return true; }
try {
return fnIsNewer(objUpdate, objScript);
}
catch (x) {
return (!(objUpdate.date < objScript.date) && (objUpdate.version != objScript.version));
}
}
};
var UNSAFE = ((typeof unsafeWindow) != 'undefined'
? unsafeWindow
: ((typeof window) != 'undefined'
? window
: (function(){return this;})()
)
);
function showUpdate(objUpdate, objScript) {
if(UNSAFE.self !== UNSAFE.top){ return; }
if(arguments.length < 2){ return UPDATE.check(arguments.callee); }
var title = objUpdate.name + ' ' + objUpdate.version + ', released ' + objUpdate.date;
var style = [
'position:absolute; position:fixed; z-index:9999;'
,'bottom:0; right:0;'
,'border:1px solid black; padding:2px 2px 2px 0.5ex;'
,'background:#dddddd; font-weight:bold; font-size:small;'
].join(' ');
document.body.appendChild($E('div', {title: title, style: style}
,$E('a', {href: objScript.source, style: 'color:blue;'}, objScript.name + ' ')
,$E('a', {href: objScript.identifier, style: 'color:red;'}, 'updated!')
,$E('button', {onclick: 'return this.parentNode.parentNode.removeChild(this.parentNode) && false;',
style: 'margin-left:1ex;font-size:50%;vertical-align:super;'}, '\u2573')
));
}
var $E = function createElement (strName, objAttributes, varContent /*, varContent, ...*/) {
var el = document.createElement(strName);
try{
for (var attribute in objAttributes) {
el.setAttribute(attribute, objAttributes[attribute]);
}
}catch(x){}
if (arguments.length > 3 || (!/^(string|undefined)$/.test(typeof(varContent)) && !(varContent instanceof Array))) {
varContent = Array.prototype.slice.call(arguments, 2);
}
if (varContent instanceof Array) {
for (var L = varContent.length, i = 0, c; i < L; i++) {
c = varContent[i];
el.appendChild(c && typeof(c) == 'object' && 'parentNode' in c
? c : document.createTextNode(c));
}
}
else if (varContent) {
el.innerHTML = varContent;
}
return el;
}
if ((window.document || {}).readyState === 'complete') {
showUpdate();
}
else {
window.addEventListener("load", showUpdate, true);
}
})();
