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// ==UserScript==
// @name Eza's Image Glutton
// @version 1.42.7
// @description Redirects to high-resolution images on gallery sites, skipping past descriptions & comments.
// @author Ezalias (https://greasyfork.org/en/users/4876-ezalias)
// @copyright 2021, Bruce Bentley (https://github.com/brucebentley)
// @license MIT; https://opensource.org/licenses/MIT
// @homepage https://greasyfork.org/en/users/4876-ezalias
// @namespace https://github.com/brucebentley
// @match *://*.deviantart.com/*/art/*
// @match *://*.deviantart.com/art/*
// @match *://*.media.tumblr.com/*/s*
// @match *://*.tumblr.com/*
// @match *://*.tumblr.com/image/*
// @match *://gfycat.com/*
// @match *://*imgur.com/*
// @match *://i.imgur.com/*.gifv
// @match *://luscious.net/c/*
// @match *://luscious.net/pictures/c/*
// @match *://pbs.twimg.com/media/*
// @match *://r34hub.com/en/show/*
// @match *://www.gifdeliverynetwork.com/*
// @match *://www.redgifs.com/watch/*
// @exclude *://pbs.twimg.com/media/*=orig*
// @exclude *://www.deviantart.com/users/outgoing?*
// @exclude *?comment*
// @exclude *&pid=*
// @exclude *#c*
// @exclude *#comment*
// @exclude *#dnr
// @run-at document-idle
// @noframes
// @require https://greasemonkey.github.io/gm4-polyfill/gm4-polyfill.js?updated=20180103
// @downloadURL https://raw.githubusercontent.com/brucebentley/userscripts/main/src/media/images/ezas-image-glutton.user.js
// @updateURL https://raw.githubusercontent.com/brucebentley/userscripts/main/src/media/images/ezas-image-glutton.user.js
// @grant none
// ==/UserScript==
// Any single-image submission will redirect to the full-size image. On multi-image submissions, every page except the first will redirect to its full-size image.
// If you go 'back' to the normal gallery page (to favorite the image, read its description, leave a comment, etc.) then this script will not send you forward again.
// https://greasyfork.org/scripts/4713-eza-s-image-glutton
// https://sleazyfork.org/scripts/4713-eza-s-image-glutton
// Commentary on the UserScript block:
// @exclude #dnr - This string is appened to a URL when redirecting, to prevent back-trapping.
// @exclude http://www.deviantart.com/users/outgoing?* - Archaic misfire prevention; should probably be changed to automatically redirect through.
// @exclude ?comment etc. - Site-specific cases where redirecting to the image is not desirable. E.g. when linked to individuals comments / comment pages.
// global variables, for simplicity
let image_url = ''; // location of the full-size image to redirect to
let wait_for_dnr = false; // some site URLs use '#' liberally, so if this const isn't empty, only '#dnr' will stop a redirect
let simple_redirect = false; // some domains are kicking back my JS redirect (for native referral), so do naive location=url instead
let page_failed = false; // If the page 503s or otherwise forces us to reload, wait a moment, then reload.
let interval_handle; // In case we need to set an interval, this is the global handle to kill it. Because a simple 'die' or 'clearInterval( this )' would be too much to ask.
let assume_extension = true; // Most sites should obviously point to an image, so if there's no file extension, guess '.jpg'. This breaks DeviantArt.
// detect site, extract image URL, then decide whether or not to redirect
switch (
document.domain.replace('www.', '') // Remove 'www' to avoid cases where both example.com and www.example.com are supported.
) {
// ------ Simple extract_image_url_after / get_link_with_text / querySelector sites
case 'gfycat.com':
extract_image_url_after('og:video', '//');
break;
case 'redgifs.com':
extract_image_url_after('og:video', '//');
break;
case 'gifdeliverynetwork.com':
extract_image_url_after('og:video', '//');
break;
case 'r34hub.com':
image_url = document.querySelector('.media-wrapper img, .media-wrapper source').src;
break;
// ------ Slightly complicated extract_image_url_after sites
case 'luscious.net':
image_url = document.getElementsByClassName('icon-download')[0].href;
wait_for_dnr = true;
break;
case 'i.imgur.com':
image_url = document.querySelector('source').src;
break;
// ------ Simple custom sites
case 'pbs.twimg.com':
image_url =
window.location.href
.split('&')
.filter((s) => !s.match('name='))
.join('&') + '&name=orig';
if (image_url.indexOf('?') < 0) {
image_url = image_url.replace('&', '?');
} // string.match( '?' ) reads the ? like a regex. In quotes. Ugh.
assume_extension = false;
break;
}
// ------ Holdovers from the previous method; domains that don't neatly conform to document.domain switch selection.
if (domain('tumblr.com')) {
// 2020 Tumblr is some bullshit. You cannot get a bare image. It always redirects to a page. But it's no longer a page with the large-sized image, because go fuck yourself. But: the general /image page we're still somehow redirecting from does have a large image... which you cannot right-click and save. I have fucking tried. Just bullshit of the highest order, instead of using CORS to deny hotlinks and just delivering a goddamn JPG.
extract_image_url_after('"og:image"', 'http');
simple_redirect = true;
// https://66.media.tumblr.com/99be3174c6066bb219cca0008f351ce5/4692a02d2fc92812-d6/s500x750/bd6f4ec02cc4a9aa036f3274b9c8af447e285a59.png
if (document.querySelector('a')) {
image_url = image_url.replace(/\/s\d*x\d*\//, '/s3072x3072/'); // E.g. s400x600, s640x960.
image_url = image_url + '#dnr'; // Prevent infinite loops
// Adding do-not-redirect sometimes breaks this, but I'd rather publish missing functionality than an infinite redirect trap.
// I guess I should detect whether we're on an HTML page or a bare image?
}
}
if (domain('deviantart.com')) {
scrape_deviantart();
wait_for_dnr = true;
}
if (page_failed) {
image_url = '';
} // If the page refused to load properly, do not redirect. (The delayed automatic reload is now in reload_if.)
// Don't redirect if the filetype is obviously not an image. SWF, TXT, MP3, etc.
// It's tedious to detect flash, story, and music pages on every website supported, so instead let's just cancel redirection based on those file extensions.
// Added ZIP & RAR because apparently DeviantArt lets you host 3D models and stuff. Automatically downloading those is not what this script is for.
const ext = image_url.substring(image_url.lastIndexOf('.') + 1, image_url.length); // e.g. 'png'
const not_images = ['mp3', 'swf', 'txt', 'docx', 'pdf', 'doc', 'rtf', 'midi', 'mid', 'wav', 'flv', 'cab', 'zip', 'rar'];
for (const n in not_images) {
if (ext === not_images[n]) {
image_url = '';
}
} // If the extension is in our blacklist, don't redirect.
// Oh right. Doesn't work on FA because FA points to the icon. Yaaayfuck.
// Redirect as a function.
// Slightly clunky way to trigger this from website-specific functions. 'Don't repeat yourself.'
// Conveniently - any delay should (should) prevent Chrome from eating #dnr pages.
// The minimum value for setTimeout is probably 4ms or 10ms, but aiming lower can't hurt.
setTimeout(redirect, 1);
// Execution continues:
function redirect() {
// Having defined image_url based on the page's HTML or DOM, modify the current URL to prevent back-traps, then redirect to that full image.
let do_we_redirect = true; // If we've come this far we'll probably go to an image.
if (image_url === '') {
do_we_redirect = false;
} // Don't redirect to an empty string. (Emptying this string is how some functions fail safe.)
if (!wait_for_dnr && window.location.href.match('#')) {
do_we_redirect = false;
} // Don't redirect if the wait_for_dnr flag is false and there's a hash. (E.g. FA comments.)
if (window.location.href.match('#dnr')) {
do_we_redirect = false;
} // Don't redirect if there's a #dnr in the URL.
if (do_we_redirect === true) {
// So much clearer than a mess of &&s and ||s.
// some images don't redirect properly, even if you manually 'view image' - so we append '.jpg' to URLs without extensions, forcing the browser to consider them images
// even if this doesn't work, the new URL should just 404, which is better than the semi-modal 'octet stream' dialog seen otherwise.
if (assume_extension) {
if (image_url.lastIndexOf('/') > image_url.lastIndexOf('.')) {
image_url = image_url + '.jpg';
} // if there's not a '.' after the last '/' then slap a file extension on there
if (image_url[image_url.length - 1] === '.') {
image_url = image_url + 'jpg';
} // if the URL ends with a dot, slap a file extension on there
}
// modify current location, so that when the user clicks 'back,' they aren't immediately sent forward again
const modified_url = window.location.href + '#dnr'; // add do-not-redirect tag to current URL
history.replaceState({ foo: 'bar' }, 'Do-not-redirect version', modified_url); // modify URL without redirecting. {foo:'bar'} is a meaningless but necessary state object.
image_url = encodeURI(image_url); // Executing code with strings from the page has always been a mildly horrifying attack surface - hopefully this defangs it.
if (simple_redirect) {
window.location.href = image_url;
// This has different referral properties than clicking a link or displaying an image, so some sites 403
} else {
location.assign("javascript:window.location.href='" + image_url + "';");
} // Pixiv-friendly redirect to full image: maintains referral, happens within document's scope.
}
} // End of main execution.
// ----- // Functions for readability
function extract_image_url_after(string_before_url, url_begins_with) {
// extract the first quote-delimited string that appears after unique first const and begins with second var
const html_elements = document.getElementsByTagName('html'); // this avoids doing getElementsEtc every time, while accessing the whole page HTML by reference
const string_index = html_elements[0].innerHTML.indexOf(string_before_url); // find a unique string somewhere before the image URL
if (string_index > -1) {
const image_index = html_elements[0].innerHTML.indexOf(url_begins_with, string_index); // find where the image URL starts after the unique string
const delimiter_index = html_elements[0].innerHTML.indexOf('', image_index); // find first doublequote after the image URL starts
image_url = html_elements[0].innerHTML.substring(image_index, delimiter_index); // grab the image URL up to the next doublequote
}
// return image_url; // Debug
}
function reload_if(error_string) {
// Put reload on a delayed thread so that errors in the get-an-image-URL part can fail safely.
if (document.body.innerHTML.match(error_string)) {
// Look for a string indicating the page failed to load
page_failed = true; // Prevent spurious redirection.
setTimeout(function () {
location.reload();
}, Math.floor(Math.random() * 10 + 1) * 1000);
// 1s-10s pause. Most errors will be 503s, so let's avoid hammering the site like a naive spider. .
}
}
function get_link_with_text(string_in_text) {
// image_url = Array.from( document.querySelectorAll( 'a' ) ).find( a => a.textContent.match( string_in_text ) ).href; // Goddamn TypeErrors.
let link = Array.from(document.querySelectorAll('a')).find((a) => a.textContent.match(string_in_text));
if (link) {
image_url = link.href;
}
}
// Sensible 'are we on this site or not?!' function.
function domain(ending) {
let want = ending.split('.').reverse(); // Reverse order, from TLD to domain to subdomain(s).
let have = document.domain.split('.').reverse();
for (let n = 0; n < want.length; n++) {
if (want[n] !== have[n]) {
return false;
}
} // Implicit else
return true;
}
// ----- // Functions for individual websites (separated for being especially long)
// Keeping old notes about Deviantart is pointless because there is nothing constant or reliable about this entire goddamn website.
function scrape_deviantart() {
image_url = (document.querySelector('link[href*="token="]') || { href: '' }).href; // Can't wait for object?.property syntax.
if (image_url === '') {
image_url = Array.from(document.head.getElementsByTagName('meta')).filter((meta) => meta.content.match('fullview'))[0].content;
}
// You'd think 'fullview' would always be preferable, but on e.g. https://www.deviantart.com/thecynicalhound/art/Tofauti-Sawa-169-781760760 it's a JPG of a PNG submission.
// Pretty sure the meta-fullview thing doesn't even work anymore.
}
/*
Test suite of random URLs from the relevant sites:
http://rule34.xxx/index.php?page=post&s=view&id=1399731
http://rule34.xxx/index.php?page=post&s=view&id=1415193
*/