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// ==UserScript==
// @name RSS+Atom Feed Subscribe Button Generator
// @description Finds RSS and Atom links on a page and inserts feed subscription links for use by news aggregators
// @namespace com.livejournal.loonyone
// @homepage http://loonyone.livejournal.com/
// @include *
// @creator Manpreet Singh [junkblocker@yahoo.com]
// @license MIT
// @source https://userscripts-mirror.org/scripts/show/688
// @identifier http://userscripts.org/scripts/source/688.user.js
// @version 2.1
// @date 2013-04-19
// @icon https://upload.wikimedia.org/wikipedia/en/thumb/4/43/Feed-icon.svg/128px-Feed-icon.svg.png
// ==/UserScript==
/*
* Copyright (c) 2006-2013, Manpreet Singh [junkblocker@yahoo.com]
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
// ******
// Opera and IE7Pro compatible except
//
// 1) the auto update feature works only on firefox
// 2) link tags injection does not work in IE7Pro
//
// due to non-firefox platform limitations/differences.
//
// IE7Pro bundles an older version of this script by default.
// ******
// Version 2.1 - Fixed Content Security Policy issues
// Version 2.0 - 'more' button was broken for me
// some javascript lint cleanup
// Lighter icons by simon!
// Version 1.9 - Fixed invalid update metadata
// Version 1.8 - Layout fix on apple.com/macupdate.com etc.
// Version 1.7 - Minor layout fix on arstechnica.com
// Version 1.6 - Insert discovered link tags in header for the browser's detection to list them too
// Version 1.5 - Added license info
// Added checks for feeds like &feed=rss or &feed=atom and some case insensitivity
// Version 1.4 - Made the feed check slightly more stringent by excluding javascript: mailto: etc. urls
// Version 1.3 - Reduce the number of button shown initially to a sane minimum
// Version 1.2 - Fixed partially broken auto update.
// Don't increase the install count on userscripts.org while checking for updates
// Version 1.1 - Misc code cleanup
// Version 1.0 - Added auto update without requiring an external script
// Version 0.9 - Added a close button
// Version 0.8 - Checks some wiki feeds with ?action=rss_rc and feeds with /rss/$ or /atom/$
// Version 0.7 - Check for feedburner feeds
// Version 0.6 - Fixed a major issue with using snapshotLength when it was not available
// Version 0.5 - Updated contact info
// Version 0.4 - Added optional auto-update facility
// Version 0.3 - Added some speed optimizations
// Version 0.2 - Merged Iain Brodfoot's floating div behaviour and removed purl.org links
// - Allow revert to old behaviour by hand editing this script
// Version 0.1 - First release
/*
* Options contribution by Iain Broadfoot (ibroadfo@geeksoc.org)
* - remove link to purl
* (Manually edit this script to restore old behaviour. See TWEAK NOTE 1 below)
* - Float the buttons to enable better behaviour on blogger/blogspot.com
* (Manually edit this script to restore old behaviour. See TWEAK NOTE 2 below)
*
* Initially lifted mostly from
* Generate RSS and ATOM tags: http://highbyte.bounceme.net/greasemonkey/genrsslinkrel.user.js
* Amazon Atom Injector: http://docs.g-blog.net/code/greasemonkey/amazon_xml_feeds.user.js
* Add RSS Index: http://www.xs4all.nl/~jlpoutre/BoT/Javascript/RSSpanel/rsspanel.user.js
*
* Original buttons from the excellent: http://kalsey.com/tools/buttonmaker/
*/
(function() {
function autoUpdateFromUserscriptsDotOrg(SCRIPT) {
// Note: Version numbers must be in x.y float format
try {
if (!GM_getValue) return;
// avoid a flood of dialogs e.g. when opening a browser with multiple tabs set to homepage and a script with * includes
var DoS_PREVENTION_TIME = 2 * 60 * 1000;
var isSomeoneChecking = GM_getValue('CHECKING', null);
var now = new Date().getTime();
GM_setValue('CHECKING', now.toString());
if (isSomeoneChecking && (now - isSomeoneChecking) < DoS_PREVENTION_TIME) return;
var lastChecked = GM_getValue('LAST_CHECKED', null);
var ONE_DAY = 24 * 60 * 60 * 1000;
if (lastChecked && (now - lastChecked) < ONE_DAY) return;
GM_xmlhttpRequest({
method: 'GET',
url: SCRIPT.url + '?source', // don't increase the 'installed' count just for checking
onload: function(result) {
if (!result.responseText.match(/@version\s+([\d.]+)/)) return;
var theOtherVersion = parseFloat(RegExp.$1);
if (theOtherVersion <= parseFloat(SCRIPT.version)) return;
if (window.confirm('A new version ' + theOtherVersion + ' of greasemonkey script "' + SCRIPT.name + '" is available.\nYour installed version is ' + SCRIPT.version + ' .\n\nUpdate now?\n')) {
GM_openInTab(SCRIPT.url);
}
}
});
GM_setValue('LAST_CHECKED', now.toString());
} catch (ex) {
}
}
autoUpdateFromUserscriptsDotOrg({
name: 'RSS+Atom Feed Subscribe Button Generator',
url: 'http://userscripts.org/scripts/source/688.user.js',
version: '2.1'
});
function addEventHandler(target, eventName, eventHandler, scope) {
var f = scope ? function(){ eventHandler.apply( scope, arguments ); } : eventHandler;
if (target.addEventListener) {
target.addEventListener(eventName, f, true);
} else if (target.attachEvent) {
target.attachEvent('on' + eventName, f);
}
return f;
}
var head = document.getElementsByTagName('head');
if (head && head[0]) head = head[0];
var INITIAL_COUNT = 5;
var ATOM_ICON = '<img src="data:image/png;base64,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" style="border: none; display: inline !important;" />';
var RSS_ICON = '<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFAAAAAPAgMAAAAOp6AcAAAAAXNSR0IArs4c6QAAAAxQTFRFAAAA/2YAiY55////S8IQBgAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9wLFRMROauDVnkAAAB7SURBVBjTpc8xDoAgDEBRLuXsKToaT0FMungfMLgz4CmMdygzC1G0yGIii/EPDM0LaYWo1Z6vdtFADtWj6ctwhKNfcTE26ehm8nHhodxAApKx3iifX3vL0AM6Y09NxDJlOUAHK2o2ihkVKbcwAiZNaSb25c9/e1Zvr3UBWOasaPHYnJwAAAAASUVORK5CYII=" style="border:none; display: inline !important;" />';
var RDF_ICON = '<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFAAAAAPAgMAAAAOp6AcAAAAAXNSR0IArs4c6QAAAAxQTFRFAAAA/2YAiY55////S8IQBgAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9wLFRMKD80PCHoAAAB3SURBVBjTpc8xDsAQGIZhl+rcU4jJMaSJxX1o2A0cwx1+s0Ua+muXJrU0fQfDlycCIbPW/uogCx1J/Wj/MipWFJXR+mZqcJBrxFEkLqgE67PVeZz+khxlsL4bAJRtyI0NadBoZHBLkQqOzUBzgP6+8987p3+fdQKJXassgfh4CAAAAABJRU5ErkJggg==" style="border:none; display: inline !important;" />';
var XML_ICON = '<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFAAAAAPAgMAAAAOp6AcAAAAAXNSR0IArs4c6QAAAAxQTFRFAAAA/2YAiY55////S8IQBgAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9wLFRMRFO5cCgwAAAB3SURBVBjTY2DABuz/Y4A/DKahIFC1CgmsIUWwtPTq9dCq/et2/Vv9a9/6V69/7QcKxl79DhR8tW7X63WrXoPIXUDB8NC7QMF963b9X/3qFVDlP4hKkPbVQDWrgMpeQVSCzPxa9W/1q3/rXwHVQ8ykzJ1Y/Y4NAADEZ67GIr3R+wAAAABJRU5ErkJggg==" style="border:none; display: inline !important;" />';
var CLOSE_ICON = '<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAAPAgMAAABGuH3ZAAAAAXNSR0IArs4c6QAAAAlQTFRF/2YA////AAAALA0mBgAAAAFiS0dEAIgFHUgAAAAJcEhZcwAAEnMAABJzAYwiuQcAAAAHdElNRQfcCxUTCRv8+I/EAAAAMklEQVQI12NYtWrVCoapoaERDBMYGCSghAMLkBAQABIsDkCCkQHGAouBZeGKwXpBpgAAhtMRBKRIycIAAAAASUVORK5CYII=" style="border:none; display: inline !important;" />';
var MORE_ICON = '<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAPAgMAAADrOWVwAAAAAXNSR0IArs4c6QAAAAxQTFRFAAEA/mcAh494/v/8doDPMwAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9wLFRMNODrzO7IAAABNSURBVAjXY2BAAPv/UPCHwTQUDKpWrcHGfAVklpbWxl/9W/ULyKz9ej229GrVPyCzvPQ6SPQ/WMH12KsQUaDa2FKIWiQTsFqB5AYEAABsXUkpSEP5/AAAAABJRU5ErkJggg==" style="border:none; display: inline !important;" />';
// array to keep track of 'seen' feed links.
var seen = [];
var fsbdiv = document.createElement("div");
fsbdiv.setAttribute("id", "XmlButtons");
fsbdiv.style.textAlign = "left";
fsbdiv.style.margin = "0px";
// top right bottom left
fsbdiv.style.padding = "0px 3px 0px 3px";
// TWEAK NOTE 1 START: Comment out the next three lines to disable the buttons from floating
fsbdiv.style.position = "fixed";
fsbdiv.style.top = "0px";
fsbdiv.style.left = "0px";
fsbdiv.style.zIndex = "99999";
fsbdiv.style.display = 'inline';
// TWEAK NOTE 1 END
// Get links already declared properly in <link> elements in <head>
function getKnownTags() {
var linkRelElems = document.getElementsByTagName("link");
var tlink;
for (var i = 0, l = linkRelElems.length; i < l; i++) {
tlink = linkRelElems[i];
if (!tlink) continue;
try {
var thref = tlink.href;
var type = tlink.type;
if (type && type.match(/.*\/rs[sd](\+xml)?$/i)) {
addRssLinkTag(thref, RSS_ICON);
} else if (type && type.match(/.*\/atom\+xml$/i)) {
addRssLinkTag(thref, ATOM_ICON);
} else if (type && type.match(/^text\/xml$/i)) {
addRssLinkTag(thref, RSS_ICON);
}
} catch (e) {
}
}
}
function discoverUnknownFeeds() {
if( !document.links ) {
document.links = document.getElementsByTagName("a");
}
var links = document.links;
for (var a = 0, len = links.length; a < len ; a++) {
var link = links[a];
linkhref = link.href;
if (linkhref.match(/^rss:/) ||
linkhref.match(/^(http|ftp|feed).*([\.\/]rss([\.\/]xml|\.aspx|\.jsp|\/)?$|\/node\/feed$|\/rss\/[a-z0-9]+$|[?&;](rss|xml|rdf)=|[?&;]feed=rss[0-9.]*$|[?&;]action=rss_rc$|feeds\.feedburner\.com\/[a-z0-9]+$)/i)) {
addRssLinkTag(linkhref, RSS_ICON, "rss");
} else if (linkhref.match(/^(http|ftp|feed).*\/atom(\.xml|\.aspx|\.jsp|\/)?$|[?&;]feed=atom[0-9.]*$/i)) {
addRssLinkTag(linkhref, ATOM_ICON, "atom");
} else if (linkhref.match(/^(http|ftp|feed).*(\/feeds?\/[^.\/]*\.xml$|.*\/index\.xml$|feed\/msgs\.xml(\?num=\d+)?$)/i)) {
addRssLinkTag(linkhref, XML_ICON, "rss");
} else if (linkhref.match(/^(http|ftp|feed).*\.rdf$/i)) {
addRssLinkTag(linkhref, RDF_ICON, "rss");
} else if (linkhref.match(/^feed:\/\//i)) {
addRssLinkTag(linkhref, RSS_ICON, "rss");
}
}
}
function beenThere(linkhref) {
if (seen.length <= 0) return false;
var href = linkhref.toLowerCase();
for (var i = seen.length-1; i >=0; --i) {
if (seen[i].toLowerCase() == href) return true;
}
return false;
}
function moreFSB() {
var elem;
for (var i = 1; ; i++) {
elem = document.getElementById("XmlButton" + i);
if (!elem) break;
try {elem.style.display = "inline";} catch(e) {}
}
document.getElementById("MoreFSBButton").style.display = 'none';
return false;
}
function addRssLinkTag(linkhref, icon, addheadtype) {
if (beenThere(linkhref)) {
return;
} else {
seen.push(linkhref);
}
if (seen.length == (INITIAL_COUNT + 1)) {
var moreButton = document.createElement('a');
moreButton.innerHTML = MORE_ICON;
moreButton.style.display = 'inline';
moreButton.style.cursor = 'pointer';
moreButton.id = 'MoreFSBButton';
addEventHandler(moreButton, 'click', moreFSB);
fsbdiv.appendChild(moreButton);
fsbdiv.appendChild(document.createTextNode(" "));
}
var flink = document.createElement("a");
flink.innerHTML = icon;
flink.href = linkhref;
// TWEAK NOTE 2 START : Uncomment the href line below to retore linking
// to purl.org pages for easy subscription in feed readers. This service
// creates link for all known aggregators which support RSS subscription
// service via a URL.
// href = "http://purl.org/net/syndication/subscribe/?rss=" + linkhref;
// TWEAK NOTE 2 END
flink.alt = linkhref;
flink.title = linkhref;
flink.id = 'XmlButton' + seen.length;
if (seen.length >= (INITIAL_COUNT + 1)) {
flink.style.display = 'none';
}
fsbdiv.appendChild(flink);
fsbdiv.appendChild(document.createTextNode(" "));
// <link href="url" rel="alternate" title="desc" type="application/rss+xml" />
if (addheadtype && head) {
var link = document.createElement("link");
link.href=linkhref;
link.rel="alternate";
link.title=linkhref + " (discovered by RSS+Atom Feed Subscribe Button Generator)";
link.type="application/" + addheadtype + "+xml";
head.appendChild(link);
}
}
getKnownTags();
discoverUnknownFeeds();
var body = document.getElementsByTagName("body")[0];
function closeFSB() {
try {
document.getElementById("XmlButtons").style.display = 'none';
} catch(e) {}
}
// insert the div only if something was found
if (seen.length > 0) {
if (head) {
var closeButton = document.createElement('a');
closeButton.innerHTML = CLOSE_ICON;
addEventHandler(closeButton, 'click', closeFSB);
closeButton.style.display = 'inline';
closeButton.style.cursor = 'pointer';
}
fsbdiv.insertBefore(closeButton, fsbdiv.firstChild);
setTimeout(function() {
body.insertBefore(fsbdiv, body.firstChild);
}, 333); // hack to workaround the duplicated content problem
}
})();