Modifies images to link to their original ("-og") version. Works for (a) the dashboard, (b) blogs displayed on right sidebar in the dashboard, (c) blog streams (xxx.bdsmlr.com) and (d) individual posts (xxx.bdsmlr.com/post/yyyyyyyyyy). It does NOT work for the archive view. The script also displays the timestamp of the post in the upper right corner.
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// ==UserScript==
// @name BDSMLR - clickable links to original high-res images and display timestamps
// @namespace bdsmlr_linkify
// @version 2.2.0
// @license GNU AGPLv3
// @description Modifies images to link to their original ("-og") version. Works for (a) the dashboard, (b) blogs displayed on right sidebar in the dashboard, (c) blog streams (xxx.bdsmlr.com) and (d) individual posts (xxx.bdsmlr.com/post/yyyyyyyyyy). It does NOT work for the archive view. The script also displays the timestamp of the post in the upper right corner.
// @author marp
// @homepageURL https://gf.zukizuki.org/en/users/204542-marp
// @include https://bdsmlr.com/
// @include https://bdsmlr.com/dashboard
// @include https://*.bdsmlr.com/
// @include https://*.bdsmlr.com/post/*
// @include https://bdsmlr.com/uploads/photos/*
// @include https://bdsmlr.com/uploads/pictures/*
// @include https://*.bdsmlr.com/uploads/photos/*
// @include https://*.bdsmlr.com/uploads/pictures/*
// @run-at document-end
// ==/UserScript==
//console.info("START href: ", window.location.href);
//------------------------------------------------------------
// FIRST PART OF SCRIPT #2 - function that gets called by event oberver registers as part of 1st part #1 (see below)
//------------------------------------------------------------
function createImageLinks(myDoc, myContext) {
//console.info("createImageLinks: ", myContext);
if (myDoc===null) myDoc = myContext;
if (myDoc===null) return;
if (myContext===null) myContext = myDoc;
var matches;
var tmpstr;
var singlematch;
var origpostlink;
var origbloglink;
var origblog;
var imagematches;
var imageurl;
var imagesrc;
var cdnmatches;
var cdnnumber;
matches = myDoc.evaluate("./descendant-or-self::div[contains(@class,'postholder')] | ./descendant-or-self::div[contains(@class,'post_content')]",
myContext, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
for(var i=0, el; (i<matches.snapshotLength); i++) {
el = matches.snapshotItem(i);
if (el) {
try {
// try to find info about original poster (if this is a reblog) as well as the link to the individual (potentially reblogged) post
// both info only seem to be present on dashboard and on rightside overlay blogs - but not always on individual blogs (xxx.bdsmlr.com) or on individual blog post URLs :-(
singlematch = myDoc.evaluate(".//div[contains(@class,'originalposter')]/a[contains(@href,'.bdsmlr.com/post/')]",
el, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null);
origpostlink = singlematch.singleNodeValue; // xxxx.bdsmlr.com/post/yyyyyyyy
if (origpostlink) {
origblog = origpostlink.getAttribute("href"); //everything after and including "/post" gets truncated away later anyway
} else {
origblog = null;
}
if (origblog === null) {
//second method might find the originial blog URL (xxxx.bdsmlr.com)
singlematch = myDoc.evaluate(".//div[contains(@class,'post_info')]//i[contains(@class,'retweet') or contains(@class,'rbthis')]" +
"/following-sibling::a[contains(@class,'adata') or contains(@class,'ndata')]",
el, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null);
origbloglink = singlematch.singleNodeValue; // xxxx.bdsmlr.com
if (origbloglink) {
tmpstr = origbloglink.getAttribute("href");
if ( tmpstr && (tmpstr.length > 10) &&
!(tmpstr.includes("//.bdsmlr.com") ) ) {
origblog = tmpstr;
}
}
if (origblog === null) {
// if neither of the two above find anything then this is likely NOT a reblogged post but the original post -> get the orginial blog post URL
singlematch = myDoc.evaluate(".//a[(contains(@class,'adata') or contains(@class,'ndata')) and contains(@href,'.bdsmlr.com/post/')]",
el, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null);
origpostlink = singlematch.singleNodeValue; // xxxx.bdsmlr.com
if (origpostlink) {
tmpstr = origpostlink.getAttribute("href");
if ( tmpstr && (tmpstr.length > 10) &&
!(tmpstr.includes("//.bdsmlr.com") ) ) {
origblog = tmpstr;
}
}
if (origblog === null) {
if ( !window.location.href.startsWith("https://bdsmlr.com") ) {
// if no link to neither original blog nor original blog post was found then we assume that this is the original blog post or blog itself (this is a rather shaky assumtion - fingers crossed...)
origblog = window.location.href;
}
else {
// however - if the current url is the dashboard then we're out of luck
origblog = null;
}
}
}
}
// iterate over all links to images (i.e. does NOT (yet) create links to images where none exist in the first place)
// skip over items that already have a link to a "non-cdn" bdsmlr url
imagematches = myDoc.evaluate(".//div[contains(@class,'image_container') or contains(@class,'image_content')]" +
"//a[(@href='') or ((contains(@class,'magnify') or contains(@class,'image-link')) and contains(@href,'https://cdn') and contains(@href,'.bdsmlr.com'))]" +
"/img",
el, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
for(var j=0, image, imagelink; (j<imagematches.snapshotLength); j++) {
image=imagematches.snapshotItem(j);
if (image) {
imagesrc = image.src;
imagelink = image.parentNode;
imageurl = imagelink.getAttribute("href");
if (imageurl === null || imageurl.length < 5) {
imageurl = image.getAttribute("src");
// No idea why this is needed... DevTools inspector always shows a valid image src attribute... but at script execution time... apparently not... seems to be some bdsmlr JavaScript post-processing...
if (imageurl === null || imageurl.length < 5) {
imageurl = image.getAttribute("data-echo");
}
}
if (imageurl && imageurl.length > 5) {
// get url to "-og" image on save host - if the url already conatrins "-og" it will simply return the passed in argument (tmpstr == imageurl)
tmpstr = getOriginalImageURL(imageurl);
// analyze to which cdn server the url points
cdnmatches = imageurl.toLowerCase().match("https:\/\/cdn([0-9]+)\.bdsmlr\.com\/");
if (cdnmatches !== null) {
cdnnumber = parseInt(cdnmatches[1], 10);
} else {
cdnnumber = NaN;
}
// ONLY IF there is no -og url already OR if the cdn server is cdn 01, cdn 02 or cdn 03 -> apply this script's algorithm to locate -og image
// -> i.e do not touch already existing -og urls to cdn04 or beyond servers (cdn05, etc.)
// => NOTE: script algorithm will still trigger if the image is not found (see the script logic that applies to "*bdsmlr.com/uploads/*") further below
if ( (imageurl.length != tmpstr.length) || // will be unequal if there was no -og url to begin with (but instead created by getOriginalImageURL)
isNaN(cdnnumber) || cdnnumber <= 3 ) {
// if we have the url of the original blog then we use a different mechanism to reconstruct the orig image URL
// otherwise we stay with tmpstr as is
if (origblog && origblog.length > 5) {
// if we have info about original poster -> construct link to "-og" version of image on orig posters blog (e.g. https://<origposter>.bdsmlr.com/<....>/imagename-og.jpg)
tmpstr = getOriginalPosterImageURL(imageurl, origblog);
tmpstr = getOriginalImageURL(tmpstr);
tmpstr = tmpstr + "invalidurl"; //create an invalid url which will trigger the sceond part of this script (see below - if statement on window.location.href)
}
}
// hopefully temporary workaround to avoid bdsmlr circular redirections - such cirular redirs cause GreaseMonkey NOT to trigger at all! :-(
// there seem to be no redirs in place on "https://bdsmlr.com/uploads/..." while there seem to be several circular ones on various cdn servers
if (tmpstr.toLowerCase().startsWith("https://cdn")) {
tmpstr = "https://" + tmpstr.substring(tmpstr.toLowerCase().indexOf(".bdsmlr.com") + 1);
}
// get the link node and set the link target - pass on context information to second part of this script (below)
image.parentNode.setAttribute("href", tmpstr + "?cdnnumber=" + cdnnumber + "&initialurl=" + encodeURIComponent(imageurl) + "&initialsrc=" + encodeURIComponent(imagesrc));
}
}
}
} catch (e) { console.warn("error: ", e); }
}
}
}
// try to find the timestamp info and display in upper right corner
function displayTimestamps(myDoc, myContext) {
//console.info("displayTimestamps: ", myContext);
if (myDoc===null) myDoc = myContext;
if (myDoc===null) return;
if (myContext===null) myContext = myDoc;
var matches;
var tmpstr;
var singlematch;
var postinfo;
var timestamp;
var newnode;
matches = myDoc.evaluate("./descendant-or-self::div[contains(@class,'feed') and @title]",
myContext, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
for(var i=0, el; (i<matches.snapshotLength); i++) {
el = matches.snapshotItem(i);
if (el) {
try {
timestamp = el.getAttribute("title");
if (timestamp && timestamp.length>5 && timestamp.length<70) {
singlematch = myDoc.evaluate(".//div[contains(@class,'post_info')]",
el, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null);
postinfo = singlematch.singleNodeValue;
if (postinfo) {
newnode = myDoc.createElement("div");
newnode.setAttribute("style", "float:right; margin-right: 10px; padding-right: 10px;");
newnode.innerHTML = timestamp;
postinfo.appendChild(newnode);
}
}
} catch (e) { console.warn("error: ", e); }
}
}
}
function getOriginalPosterImageURL(imageurl, originalposter) {
if (originalposter === null) {
return imageurl;
}
var pos = imageurl.toLowerCase().indexOf(".bdsmlr.com");
var pos2 = originalposter.toLowerCase().indexOf(".bdsmlr.com");
if (pos > 0 && pos2 > 0) {
return originalposter.substring(0, pos2) + imageurl.substring(pos);
} else {
return imageurl;
}
}
function getOriginalImageURL(imageurl) {
if (imageurl === null) {
return imageurl;
}
var pos = imageurl.lastIndexOf(".");
var pos2 = imageurl.lastIndexOf("-og.");
if (pos > 0 && (pos2+3)!=pos) {
return imageurl.substring(0, pos) + "-og" + imageurl.substring(pos);
} else {
return imageurl;
}
}
//------------------------------------------------------------
// SECOND PART OF SCRIPT
//------------------------------------------------------------
// this is a function used asychroniously via Promise objects
// a "parent" Promise is passed in and this function "chains" another "child" Promise (the fetch object) to it
// the (asynchronuous!) return value is NULL if the Url is not valid (404, etc) or the fetched URL if the request is sucesfull (OK 200)
function checkUrl(checkUrlPromise, baseimageurl, hostprefix, allowredirect) {
var imageurl;
if (baseimageurl.startsWith("https://")) {
baseimageurl = baseimageurl.substring(8);
}
if (hostprefix !== null && hostprefix.length > 0) {
imageurl = "https://" + hostprefix + "." + baseimageurl;
} else {
imageurl = "https://" + baseimageurl;
}
//return the newly "chained" Promise that now has a fetch promise as "child"
return checkUrlPromise.then(
function(promiseresult) {
// if the prior/parent promise resolves into a valid Url - return that Url and skip the child/follow-up fetch
if ( (promiseresult !==null) && (promiseresult.length > 10) ) {
return promiseresult;
} else {
// the prior Promise did NOT resolve into a valid URL -> try to fetch this new URL
return fetch(imageurl, (allowredirect ? { redirect: 'follow' } : { redirect: 'error' } ) ).then(
function(response) {
if (response.ok) {
if (response.redirected && allowredirect) {
return response.url;
} else {
return imageurl;
}
} else {
return null;
}
},
function(rejectreason) {
return null;
});
}
},
function(rejectreason) {
return null;
}
);
}
// Two very different actions depending on if this is for the URL of an image or for a bdsmlr page (page = dashboard, blog stream or blog post)
// -> If this if statement evaluates to true it is in the context of an image -> execute SECOND part of script -> algorithm to try to find the "-og" version of the image
if ( window.location.href.includes('bdsmlr.com/uploads/') ) {
// the "og search algorithm" only triggers if the current url is invalid - otherwise do nothing
if ( document.head.textContent !== null &&
( document.head.textContent.toLowerCase().includes('404 not found') ||
document.head.textContent.toLowerCase().includes('403 forbidden') ||
document.head.textContent.toLowerCase().includes('problem loading page') ||
document.body.textContent.toLowerCase().includes('page isn’t redirecting properly') ||
document.body.textContent.toLowerCase().includes('could not be found') ) ) {
var tmpstr = window.location.href;
// if exists, strip the suffix that was used to trigger this part of the script
if (tmpstr.lastIndexOf('invalidurl') > 0) {
tmpstr = tmpstr.substring(0, tmpstr.lastIndexOf("invalidurl"));
}
var pos = tmpstr.lastIndexOf(".");
var pos2 = tmpstr.lastIndexOf("-og.");
var pos3 = tmpstr.indexOf(".");
var baseimageurl = null;
var blogprefix = null;
var initialUrl = null;
var initialSrc = null;
var cdnnumber = -1;
var checkUrlPromise = null;
// retrieve "context" parameters that might have been passed in for the above part of the script
if (window.location.search !== null) {
var urlParams = new URLSearchParams(window.location.search);
initialUrl = urlParams.get('initialurl');
if (initialUrl !== null) {
initialUrl = decodeURIComponent(initialUrl);
}
initialSrc = urlParams.get('initialsrc');
if (initialSrc !== null) {
initialSrc = decodeURIComponent(initialSrc);
}
cdnnumber = parseInt(urlParams.get('cdnnumber'));
}
// check on what kind of url this script was triggered
if ( !(tmpstr.startsWith("https://bdsmlr.com")) &&
!(tmpstr.startsWith("https://cdn")) &&
(tmpstr.startsWith("https://")) ) { //this is a url to a specific blog (xxxx.bdsmlr.com/uploads/...)
baseimageurl = tmpstr.substring(pos3+1);
blogprefix = tmpstr.substring(8, pos3);
}
else if (tmpstr.startsWith("https://bdsmlr.com")) {
baseimageurl = tmpstr.substring(8);
}
else { // this should be a url to some kind of cdn server (cdnxx.bdsmlr.com/uploads/...)
baseimageurl = tmpstr.substring(pos3+1);
}
// starting Promise whioch resolves to invalid URL (=null)
// this is the start of the to follow "daisy-chaining" of several fetch requests to test several potential URLs
checkUrlPromise = Promise.resolve(null);
if (pos == pos2+3) { // check if this is an -og url
if ( blogprefix !== null && blogprefix.length > 0 ) { //this is a url to a specific blog (xxxx.bdsmlr.com/uploads/...)
checkUrlPromise = checkUrl(checkUrlPromise, baseimageurl, blogprefix, false);
}
checkUrlPromise = checkUrl(checkUrlPromise, baseimageurl, null, false); // "bdsmlr.com/uploads/..."
// try old cdn servers (cdn02, cdn03 and cdn04) and depending on cdnnumber context param -> also try newer cdn servers (cdn05 and beyond)
var cdn = 4;
if ( !isNaN(cdnnumber) && cdnnumber > 4 ) {
cdn = cdnnumber;
}
while (cdn >= 2) {
checkUrlPromise = checkUrl(checkUrlPromise, baseimageurl, "cdn" + cdn.toString().padStart(2, '0'), false); // "cdnXX.bdsmlr.com/uploads/..."
cdn--;
}
}
// no valid -og URL -> try the initial URL that bdsmlr provided originally
if ( (initialUrl !== null) && (initialUrl.length > 10) ) {
checkUrlPromise = checkUrl(checkUrlPromise, initialUrl, null, true); // true -> allow bdsmlr to redirect for original URL
}
// still no valid URL -> try the URL of the image shown in the original stream or blog post
if ( (initialSrc !== null) && (initialSrc.length > 10) && (initialSrc !== initialUrl) ) {
checkUrlPromise = checkUrl(checkUrlPromise, initialSrc, null, true); // true -> allow bdsmlr to redirect for original image source link
}
checkUrlPromise.then(
function(result) {
if ( (result !== null) && (result.length > 10) ) {
window.location.assign(result);
}
}
);
};
}
//------------------------------------------------------------
// FIRST PART OF SCRIPT #1 - initial statement and registration of event observer
//------------------------------------------------------------
// script runs NOT in the context of an image - i.e. dashboard, blog stream, individual post
// -> register event observer for future to-be-loaded posts (endless scrolling) and execute first part of script (createImageLinks & displayTimestamps) on already loaded posts
else
{
// create an observer instance and iterate through each individual new node
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(mutation) {
mutation.addedNodes.forEach(function(addedNode) {
createImageLinks(mutation.target.ownerDocument, addedNode);
displayTimestamps(mutation.target.ownerDocument, addedNode);
});
});
});
// configuration of the observer
// NOTE: subtree is false as the wanted nodes are direct children of <div class="newsfeed"> -> notable performance improvement
// "theme1" is the class used by the feed root node for individual user's blog (xxxx.bdsmlr.com) -> seems unstable/temporary name -> might be changed by bdsmlr
var config = { attributes: false, childList: true, characterData: false, subtree: false };
// pass in the target node (<div> element contains all stream posts), as well as the observer options
var postsmatch = document.evaluate(".//div[contains(@class,'newsfeed')] | .//div[contains(@class,'theme1')]", document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null);
var postsnode = postsmatch.singleNodeValue;
//process already loaded nodes (the initial posts before scrolling down for the first time)
createImageLinks(document, postsnode);
displayTimestamps(document, postsnode);
//start the observer for new nodes
observer.observe(postsnode, config);
// also observe the right sidebar blog stream on the dashboard
// pass in the target node, as well as the observer options
var sidepostsmatch = document.evaluate(".//div[@id='rightposts']", document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null);
var sidepostsnode = sidepostsmatch.singleNodeValue;
// sidebar does only exist on dashboard
if (sidepostsnode) {
//start the observer for overlays
observer.observe(sidepostsnode, config);
}
}