Download manga on nHentai.
// ==UserScript== // @name nHentai Downloader // @name:vi nHentai Downloader // @name:zh-CN nHentai 下载器 // @name:zh-TW nHentai 下载器 // @namespace http://devs.forumvi.com // @description Download manga on nHentai. // @description:vi Tải truyện tranh tại NhệnTái. // @description:zh-CN 在nHentai上下载漫画。 // @description:zh-TW 在nHentai上下载漫画。 // @version 4.0.0 // @icon http://i.imgur.com/FAsQ4vZ.png // @author Zzbaivong // @oujs:author baivong // @license MIT; https://baivong.mit-license.org/license.txt // @match http://nhentai.net/g/* // @match https://nhentai.net/g/* // @require https://code.jquery.com/jquery-3.6.0.min.js // @require https://cdn.jsdelivr.net/npm/[email protected]/dist/ponyfill.min.js // @require https://cdn.jsdelivr.net/npm/[email protected]/StreamSaver.min.js // @require https://cdn.jsdelivr.net/npm/[email protected]/examples/zip-stream.js // @require https://greasyfork.org/scripts/28536-gm-config/code/GM_config.js?version=184529 // @require https://greasemonkey.github.io/gm4-polyfill/gm4-polyfill.js?v=a834d46 // @noframes // @connect self // @connect proxy.duckduckgo.com // @supportURL https://github.com/lelinhtinh/Userscript/issues // @run-at document-idle // @grant GM.xmlHttpRequest // @grant GM_xmlhttpRequest // @grant unsafeWindow // @grant GM_getValue // @grant GM_setValue // @grant GM.getValue // @grant GM.setValue // ==/UserScript== /* global streamSaver, ZIP */ (($, window) => { 'use strict'; function patchHistoryApi() { const originalPushState = history.pushState; history.pushState = function (...args) { originalPushState.apply(this, args); window.dispatchEvent(new Event('locationchange')); }; const originalReplaceState = history.replaceState; history.replaceState = function (...args) { originalReplaceState.apply(this, args); window.dispatchEvent(new Event('locationchange')); }; window.addEventListener('popstate', () => { window.dispatchEvent(new Event('locationchange')); }); } patchHistoryApi(); const originalFetch = window.fetch; window.fetch = async function (...args) { const response = await originalFetch.apply(this, args); if (args[0] && typeof args[0] === 'string' && args[0].includes('/api/v2/galleries/')) { response .clone() .json() .then((data) => { let payload = null; if (data) { if (data.body) { try { payload = JSON.parse(data.body); } catch (e) { console.warn('Unable to parse gallery body JSON from fetch', e); } } else { payload = data; } } if (payload && applyGalleryData(payload)) { interceptedGalleryPayload = payload; console.log('Gallery data intercepted from fetch', payload); } }) .catch((e) => { console.log('Gallery fetch clone response not JSON or error', e); }); } return response; }; window.addEventListener('locationchange', () => { console.log('locationchange', window.location.href); setTimeout(injection, 500); }); function injection() { console.log('Injecting script', window.writableStream, window.writer, window.abortController); // Prefer AbortController for canceling active streaming download if (window.abortController && !window.abortController.signal.aborted) { window.abortController.abort(); console.log('AbortController aborted active stream'); } // Mark aborted to stop further enqueue isAborted = true; streamEnded = true; // Keep releaseLock for existing writer, if available window.writer?.releaseLock?.(); // Reset to initial state when aborted resetDownload(); } const configFrame = document.createElement('div'); $('body').append(configFrame); GM_config.init({ id: 'nHentaiDlConfig', title: 'Downloader Settings', fields: { outputExt: { options: ['cbz', 'zip'], label: 'Export as', type: 'radio', default: 'cbz', }, outputName: { label: 'Filename', type: 'select', options: ['pretty', 'english', 'japanese'], default: 'pretty', }, threading: { label: 'Max Threads', type: 'unsigned int', min: 1, max: 16, default: 4, }, useProxy: { label: 'Use proxy', type: 'checkbox', default: false, }, }, frame: configFrame, events: { save: () => { outputExt = GM_config.get('outputExt'); outputName = GM_config.get('outputName'); threading = GM_config.get('threading'); useProxy = GM_config.get('useProxy'); $download.find('span').text(` as ${outputExt.toUpperCase()}`); const $saveBtn = $('#nHentaiDlConfig_saveBtn'); $saveBtn.prop('disabled', true).addClass('saved').text('Saved!'); setTimeout(() => { $saveBtn.prop('disabled', false).removeClass('saved').text('Save'); $configPanel.hide(); }, 1500); }, }, css: '#nHentaiDlConfig{width:100%!important;max-width:320px!important;position:fixed!important;top:50%!important;left:50%!important;transform:translate(-50%,-50%)!important;z-index:9999!important;max-height:75%!important;overflow:auto!important;background:#4d4d4d!important;border:1px solid #313131!important;border-radius:5px;text-align:left;height:auto!important;padding:10px!important;color:#d9d9d9}#nHentaiDlConfig *{font-family:"Noto Sans",sans-serif}#nHentaiDlConfig .config_header{text-align:left;font-size:17px;font-weight:700;margin-bottom:20px;color:#999}#nHentaiDlConfig .reset_holder{float:left;height:30px;line-height:30px}#nHentaiDlConfig .reset{color:#4d4d4d;text-align:left}#nHentaiDlConfig .saveclose_buttons{margin:0;padding:4px;min-width:100px;height:30px;line-height:14px;border-radius:2px;border:1px solid;cursor:pointer}#nHentaiDlConfig .saveclose_buttons.saved{background:#ffeb3b;border:1px solid #ffc107}#nHentaiDlConfig #nHentaiDlConfig_closeBtn{display:none}#nHentaiDlConfig_buttons_holder{margin-top:20px;border-top:1px dashed #4d4d4d;padding-top:11px}#nHentaiDlConfig .config_var::after{clear:both;content:"";display:block}#nHentaiDlConfig .config_var{line-height:2em;position:relative}#nHentaiDlConfig .field_label{font-size:14px;height:26px;line-height:26px;margin:0;padding:0 10px 0 0;width:40%;display:block;float:left}#nHentaiDlConfig .config_var>[type=text],#nHentaiDlConfig .config_var>div,#nHentaiDlConfig .config_var>select,#nHentaiDlConfig .config_var>textarea{width:60%;border-radius:0;display:block;height:26px;line-height:26px;padding:0 10px;float:left}#nHentaiDlConfig .config_var>textarea{height:auto;line-height:14px;padding:10px;min-height:5em}#nHentaiDlConfig .config_var>select{background:#4d4d4d;color:#d9d9d9;padding:0}#nHentaiDlConfig .config_var>select:hover{background:#666}#nHentaiDlConfig .config_var>select:focus{outline:0 none}#nHentaiDlConfig .config_var>div>label{display:inline-block;vertical-align:top;margin-right:5px}#nHentaiDlConfig .config_var>#nHentaiDlConfig_field_outputName{text-transform:capitalize;border:1px solid;border-radius:4px;width:auto}#nHentaiDlConfig .config_var>#nHentaiDlConfig_field_threading{width:70px;border:1px solid;border-radius:4px}#nHentaiDlConfig .config_var>div{padding:0}#nHentaiDlConfig_field_outputExt{text-transform:uppercase}#nHentaiDlConfig_field_outputExt [value=cbz]{margin-right:20px!important}#nHentaiDlConfig .top{background:#666!important}', }); /** * Output extension * @type {'cbz'|'zip'} * * Tips: Convert .zip to .cbz * Windows * $ ren *.zip *.cbz * Linux * $ rename 's/\.zip$/\.cbz/' *.zip */ let outputExt = GM_config.get('outputExt') || 'cbz'; /** * File name * @type {'pretty'|'english'|'japanese'} */ let outputName = GM_config.get('outputName') || 'pretty'; /** * Multithreading * @type {Number} [1 -> 16] */ let threading = GM_config.get('threading') || 4; /** * Use proxy from DuckDuckGo * @type {Boolean} */ let useProxy = GM_config.get('useProxy') || false; /** * Logging * @type {Boolean} */ let debug = false; /** * Abort controller for stream cancellation * @type {AbortController|null} */ let abortController = null; /** * Cancel button jQuery object */ let $cancel = null; /** * Whether the download process is currently aborted * @type {boolean} */ let isAborted = false; /** * Whether the readable stream has been ended or canceled * @type {boolean} */ let streamEnded = false; /** * Active GM.xmlHttpRequest objects for aborting in-flight downloads * @type {Set<unknown>} */ let activeRequests = new Set(); // Gallery / download state (can be refreshed with scriptData or intercepted API response) let gallery = null; let interceptedGalleryPayload = null; let current = 0; let final = 0; let total = 0; let images = []; let hasErr = false; let comicId = null; let comicName = ''; let zipName = ''; let $_download = null; let $download = null; let $config = null; let $configPanel = null; let doc = document; let inProgress = false; function applyGalleryData(payload) { if (!payload || !payload.num_pages || !payload.pages || !Array.isArray(payload.pages)) { return false; } gallery = payload; current = 0; final = 0; total = gallery.num_pages; images = gallery.pages || []; hasErr = false; comicId = gallery.id; comicName = gallery.title[outputName] || gallery.title['english'] || ''; zipName = `${comicName .replace(/[\s|+=]+/g, '-') .replace(/[:;`'"”“/\\?.,<>[\]{}!@#$%^&*]/g, '') .replace(/・/g, '·')}.${comicId}.${outputExt}`; if ($download) { $download.html('<i class="fa fa-download"></i> Download<span> as ' + outputExt.toUpperCase() + '</span>').css('backgroundColor', 'cornflowerblue'); } if ($cancel) { $cancel.hide(); } return true; } function refreshGalleryData() { if (interceptedGalleryPayload && applyGalleryData(interceptedGalleryPayload)) { return true; } const $scriptData = $('[data-url^="/api/v2/galleries/"]'); if (!$scriptData || !$scriptData.length) { console.warn('gallery scriptData not found'); if ($download) $download.remove(); if ($cancel) $cancel.remove(); return false; } let data; try { data = JSON.parse($scriptData.text().trim()); } catch (e) { console.warn('invalid JSON in scriptData', e); if ($download) $download.remove(); if ($cancel) $cancel.remove(); return false; } if (!data) { console.warn('gallery data is empty'); if ($download) $download.remove(); if ($cancel) $cancel.remove(); return false; } let payload; try { payload = data.body ? JSON.parse(data.body) : data; } catch (e) { console.warn('invalid gallery body JSON', e); if ($download) $download.remove(); if ($cancel) $cancel.remove(); return false; } if (!payload) { console.warn('gallery payload is empty'); if ($download) $download.remove(); if ($cancel) $cancel.remove(); return false; } return applyGalleryData(payload); } function resetDownload() { console.log('Resetting download state'); streamEnded = true; try { for (const req of activeRequests) { req?.abort?.(); } activeRequests.clear(); if (window.writer) { window.writer.releaseLock?.(); window.writer = null; } if (window.reader) { window.reader.cancel?.(); window.reader = null; } if (window.writableStream) { window.writableStream = null; } if (window.readableStream) { window.readableStream = null; } } catch (e) { console.warn('Error while resetting streams:', e); } if (abortController && !abortController.signal.aborted) { abortController.abort(); } abortController = null; window.abortController = null; isAborted = false; inProgress = false; if (!refreshGalleryData()) { doc.title = '[✖] Ready'; return; } doc.title = '[✖] Ready'; if ($download) { $download.html('<i class="fa fa-download"></i> Download<span> as ' + outputExt.toUpperCase() + '</span>').css('backgroundColor', 'cornflowerblue'); } if ($cancel) { $cancel.hide(); } } function base64toBlob(base64Data, contentType) { contentType = contentType || ''; const sliceSize = 1024; const byteCharacters = atob(base64Data); const bytesLength = byteCharacters.length; const slicesCount = Math.ceil(bytesLength / sliceSize); const byteArrays = new Array(slicesCount); for (let sliceIndex = 0; sliceIndex < slicesCount; ++sliceIndex) { const begin = sliceIndex * sliceSize; const end = Math.min(begin + sliceSize, bytesLength); const bytes = new Array(end - begin); for (let offset = begin, i = 0; offset < end; ++i, ++offset) { bytes[i] = byteCharacters[offset].charCodeAt(0); } byteArrays[sliceIndex] = new Uint8Array(bytes); } return new Blob(byteArrays, { type: contentType }); } function getInfo() { let info = '', tags = [], artists = [], groups = [], parodies = [], characters = [], categories = [], languages = []; if (gallery.title?.english) info += gallery.title.english + '\r\n'; if (gallery.title?.japanese) info += gallery.title.japanese + '\r\n'; if (gallery.title?.pretty) info += gallery.title.pretty + '\r\n'; info += '#' + gallery.id + '\r\n'; if (gallery.tags) { for (const tag of gallery.tags) { if (tag.type === 'tag') tags.push(tag.name); if (tag.type === 'artist') artists.push(tag.name); if (tag.type === 'category') categories.push(tag.name); if (tag.type === 'group') groups.push(tag.name); if (tag.type === 'parody') parodies.push(tag.name); if (tag.type === 'character') characters.push(tag.name); if (tag.type === 'language') languages.push(tag.name); } } if (tags.length) info += '\r\n' + 'Tags: ' + tags.join(', '); if (categories.length) info += '\r\n' + 'Categories: ' + categories.join(', '); if (groups.length) info += '\r\n' + 'Groups: ' + groups.join(', '); if (parodies.length) info += '\r\n' + 'Parodies: ' + parodies.join(', '); if (characters.length) info += '\r\n' + 'Characters: ' + characters.join(', '); if (languages.length) info += '\r\n' + 'Languages: ' + languages.join(', '); info += '\r\n\r\n' + 'Pages: ' + total; info += '\r\n' + 'Uploaded at: ' + new Date(gallery.upload_date * 1000).toLocaleString() + '\r\n'; console.log(info); return info; } function beforeleaving(e) { e.preventDefault(); e.returnValue = ''; } function end() { window.removeEventListener('beforeunload', beforeleaving); if (debug) _timeEnd('nHentai'); } function done(filename) { doc.title = `[⇓] ${filename}`; console.log('COMPLETE'); end(); } function genZip(ctrl) { streamEnded = true; try { ctrl.close(); } catch (e) { console.warn('genZip close error', e); } $download.html('<i class="fa fa-check"></i> Complete').css('backgroundColor', hasErr ? 'red' : 'green'); } function safeEnqueue(ctrl, item) { if (isAborted || streamEnded || (abortController && abortController.signal.aborted)) { console.log('safeEnqueue skipped', item && item.name); return; } try { ctrl.enqueue(item); } catch (cErr) { // Avoid throwing on closed stream; treat as terminated streamEnded = true; console.warn('safeEnqueue error (ignored):', cErr); } } function dlImgError(current, success, error, err, filename) { if (images[current].attempt < 1) { final++; error(err, filename); return; } setTimeout(() => { console.log(filename, `retry ${images[current].attempt}`); dlImg(current, success, error); images[current].attempt--; }, 2000); } function dlImg(current, success, error) { let url = images[current].url, filename = url.replace(/.*\//g, ''); if (isAborted || streamEnded) { return; } if (useProxy) url = `https://proxy.duckduckgo.com/iu/?u=${url}&f=1`; filename = `000${filename}`.slice(-8); console.log(filename, 'progress'); const xhr = GM.xmlHttpRequest({ method: 'GET', url: url, responseType: 'blob', onload: (response) => { activeRequests.delete(xhr); if (isAborted || streamEnded) { console.log('dlImg onload ignored due abort or stream ended', filename); return; } if ( response.response.type === 'text/html' || response.response.byteLength < 1000 || (response.statusText !== 'OK' && response.statusText !== '') ) { dlImgError(current, success, error, response, filename); return; } final++; success(response, filename); }, onerror: (err) => { activeRequests.delete(xhr); if (isAborted || streamEnded) { console.log('dlImg onerror ignored due abort or stream ended', filename); return; } dlImgError(current, success, error, err, filename); }, }); } function next(ctrl) { if (isAborted) { console.log('next() aborted, no further processing'); return; } doc.title = `[${final}/${total}] ${comicName}`; $download.find('strong').text(`${final}/${total}`); console.log(final, current); if (final < current) return; final < total ? addZip(ctrl) : genZip(ctrl); } function addZip(ctrl) { if (isAborted) { console.log('addZip() aborted, skipping enqueue.'); return; } let max = current + threading; if (max > total) max = total; for (current; current < max; current++) { console.log(images[current].url, 'download'); dlImg( current, (response, filename) => { if (isAborted || streamEnded) { console.log('dlImg success ignored because aborted or ended', filename); return; } safeEnqueue(ctrl, { name: filename, stream: () => response.response.stream() }); console.log(filename, 'success'); next(ctrl); }, (err, filename) => { if (isAborted || streamEnded) { console.log('dlImg error ignored because aborted or ended', filename); return; } hasErr = true; const errGif = base64toBlob('R0lGODdhBQAFAIACAAAAAP/eACwAAAAABQAFAAACCIwPkWerClIBADs=', 'image/gif'); safeEnqueue(ctrl, { name: `${filename}_error.gif`, stream: () => errGif.stream() }); $download.css('backgroundColor', '#FF7F7F'); console.log(err, 'error'); next(ctrl); }, ); } console.log(current, 'current'); } if (!refreshGalleryData()) return; $_download = $('#download-torrent, #download'); if (!$_download.length) return; GM_config.open(); $configPanel = $('#nHentaiDlConfig'); $download = $( '<button type="button" id="nHentaiDlDownload" class="btn btn-secondary tooltip" style="min-width:120px;margin:0 6px;">' + '<i class="fa fa-download"></i> Download<span class="top">No login required<br>No sign up required<i></i></span>' + '</button>', ); $download.prop('disabled', false); $download.append(`<span> as ${outputExt.toUpperCase()}</span>`); $cancel = $( '<button type="button" id="nHentaiDlCancel" class="btn btn-secondary" style="min-width:40px;margin:0 6px;background-color:#d9534f;">' + '<i class="fa fa-times"></i><div class="top">Cancel<i></i></div>' + '</button>', ); $cancel.hide(); $config = $( '<button type="button" id="nHentaiDlConfigToggle" class="btn btn-secondary" style="min-width:40px;margin:0 6px;color:#d9d9d9;">' + '<i class="fa fa-cog"></i> Settings' + '</button>', ); const $controlPanel = $( '<div id="nHentaiDlControlPanel" style="position:fixed;bottom:16px;left:50%;transform:translateX(-50%);z-index:9999;padding:8px 12px;background:rgba(0,0,0,.75);border:1px solid #333;border-radius:7px;box-shadow:0 4px 12px rgba(0,0,0,.45);display:flex;align-items:center;justify-content:center;gap:6px;">' + '</div>', ); $controlPanel.append($download, $cancel, $config); $('body').append($controlPanel); $cancel.on('click', (e) => { e.preventDefault(); if (!inProgress) return; console.log('Cancel clicked'); isAborted = true; if (abortController && !abortController.signal.aborted) { abortController.abort(); } $cancel.hide(); resetDownload(); }); $download.css('backgroundColor', 'cornflowerblue').on('click', (e) => { e.preventDefault(); if (inProgress) return; inProgress = true; if (debug) _time('nHentai'); console.log({ outputExt, outputName, threading }); isAborted = false; streamEnded = false; if (threading < 1) threading = 1; if (threading > 16) threading = 16; doc.title = `[⇣] ${comicName}`; window.addEventListener('beforeunload', beforeleaving); $download .html('<i class="fa fa-spinner fa-spin"></i> <strong>Waiting...</strong>') .css('backgroundColor', 'orange'); if ($cancel) { $cancel.show(); } images = images.map((img, index) => { return { url: `https://i.nhentai.net/${img.path}`, attempt: 3, }; }); console.log(images, 'images'); // Setup AbortController so both reading/writing paths can support cancel abortController = new AbortController(); const abortSignal = abortController.signal; window.abortController = abortController; streamSaver.mitm = 'https://lelinhtinh.github.io/stream/mitm.html'; window.writableStream = streamSaver.createWriteStream(zipName); const info = new Blob([getInfo()]); window.readableStream = new ZIP({ start(ctrl) { ctrl.enqueue({ name: 'info.txt', stream: () => info.stream(), }); }, pull(ctrl) { addZip(ctrl); }, }); const handleAbortError = (err) => { if (abortSignal.aborted || isAborted) { console.warn('Download aborted by user.'); streamEnded = true; console.error('Download error:', err); } resetDownload(); }; if (window.WritableStream && window.readableStream.pipeTo) { window.readableStream .pipeTo(window.writableStream, { signal: abortSignal }) .then(() => { done(comicName); inProgress = false; }) .catch(handleAbortError); } else { window.writer = window.writableStream.getWriter(); window.reader = window.readableStream.getReader({ signal: abortSignal }); const pump = () => window.reader.read().then((res) => { if (res.done) { return window.writer.close(); } return window.writer.write(res.value).then(pump); }); pump() .then(() => { done(comicName); inProgress = false; }) .catch(handleAbortError); } }); $configPanel.toggle(); $config.on('click', (e) => { e.preventDefault(); $configPanel.toggle('fast'); }); })(jQuery, unsafeWindow);
