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Adds Sci-Hub, LibGen, LibSTC and Anna's Archive buttons to Google Scholar results
当前为
// ==UserScript==
// @name Google Scholar to free PDFs
// @namespace ScholarToSciHub
// @version 1.11
// @description Adds Sci-Hub, LibGen, LibSTC and Anna's Archive buttons to Google Scholar results
// @author Bui Quoc Dung
// @match https://scholar.google.*/*
// @license AGPL-3.0-or-later
// @grant GM_xmlhttpRequest
// ==/UserScript==
const SCIHUB_URL = 'https://www.tesble.com/';
const LIBGEN_URL = 'https://libgen.li/index.php?req=';
const ANNA_URL = 'https://annas-archive.org/scidb/';
const ANNA_CHECK_URL = 'https://annas-archive.org/search?index=journals&q=';
const LIBSTC_BASE_URL = 'https://hub.libstc.cc/';
const SCINET_URL = 'https://sci-net.xyz/';
const DOI_REGEX = /\b(10\.\d{4,}(?:\.\d+)*\/(?:(?!["&'<>])\S)+)\b/gi;
function updateLink(span, textContent, href, isNo = false) {
const link = document.createElement('a');
link.textContent = textContent;
link.href = href;
link.target = '_blank';
link.rel = 'noreferrer noopener';
link.style.fontSize = '15px';
if (isNo) link.style.color = 'gray';
link.innerHTML = textContent.replace('[PDF]', '<b>[PDF]</b>');
span.replaceWith(link);
}
function fetchDOI(titleLink, callback) {
GM_xmlhttpRequest({
method: 'GET',
url: titleLink.href,
onload: res => {
const matches = res.responseText.match(DOI_REGEX);
callback(matches && matches.length ? matches[0] : null);
},
onerror: () => callback(null)
});
}
function addLoadingIndicator(container) {
const span = document.createElement('div');
span.textContent = 'Loading...';
span.style.marginBottom = '4px';
span.style.color = 'gray';
span.style.fontSize = '15px';
container.appendChild(span);
return span;
}
function checkLibGenPDF(title, span) {
GM_xmlhttpRequest({
method: 'GET',
url: LIBGEN_URL + encodeURIComponent(title),
onload: res => {
const doc = new DOMParser().parseFromString(res.responseText, 'text/html');
const hasPDF = !!doc.querySelector('.table.table-striped');
updateLink(span, hasPDF ? '[PDF] LibGen' : '[No] LibGen', LIBGEN_URL + encodeURIComponent(title), !hasPDF);
},
onerror: () => updateLink(span, '[No] LibGen', LIBGEN_URL + encodeURIComponent(title), true)
});
}
function checkSciHubPDF(url, span) {
GM_xmlhttpRequest({
method: 'GET',
url: SCIHUB_URL + url,
onload: res => {
const hasPDF = /iframe|pdf|embed/i.test(res.responseText);
updateLink(span, hasPDF ? '[PDF] Sci-Hub' : '[No] Sci-Hub', SCIHUB_URL + url, !hasPDF);
},
onerror: () => updateLink(span, '[No] Sci-Hub', SCIHUB_URL + url, true)
});
}
function checkAnnaPDF(doi, span) {
const checkUrl = ANNA_CHECK_URL + encodeURIComponent(doi);
GM_xmlhttpRequest({
method: 'GET',
url: checkUrl,
onload: res => {
const doc = new DOMParser().parseFromString(res.responseText, 'text/html');
const hasPDF = !!doc.querySelector('.mt-4.uppercase.text-xs.text-gray-500');
updateLink(span, hasPDF ? '[PDF] Anna' : '[No] Anna', ANNA_URL + doi, !hasPDF);
},
onerror: () => updateLink(span, '[No] Anna', ANNA_URL + doi, true)
});
}
function checkLibSTCPDF(doi, span) {
const url = LIBSTC_BASE_URL + doi + '.pdf';
GM_xmlhttpRequest({
method: 'HEAD',
url: url,
onload: res => {
const isPDF = res.status === 200 && res.responseHeaders.toLowerCase().includes('application/pdf');
updateLink(span, isPDF ? '[PDF] LibSTC' : '[No] LibSTC', url, !isPDF);
},
onerror: () => updateLink(span, '[No] LibSTC', url, true)
});
}
function checkSciNetPDF(doi, span) {
const sciNetUrl = SCINET_URL + doi;
GM_xmlhttpRequest({
method: 'GET',
url: sciNetUrl,
onload: function(response) {
const hasPDF = /iframe|pdf|embed/.test(response.responseText);
updateLink(span, hasPDF ? '[PDF] Sci-net' : '[No] Sci-net', sciNetUrl, !hasPDF);
},
onerror: function() {
updateLink(span, '[No] Sci-net', sciNetUrl, true);
}
});
}
function addButtons() {
document.querySelectorAll('#gs_res_ccl_mid .gs_r.gs_or.gs_scl').forEach(result => {
const titleLink = result.querySelector('.gs_rt a');
const yearElement = result.querySelector('.gs_a');
if (!titleLink || !yearElement) return;
let buttonContainer = result.querySelector('.gs_or_ggsm');
if (!buttonContainer) {
const div = document.createElement('div');
div.className = 'gs_ggs gs_fl';
div.innerHTML = '<div class="gs_ggsd"><div class="gs_or_ggsm"></div></div>';
result.insertBefore(div, result.firstChild);
buttonContainer = div.querySelector('.gs_or_ggsm');
}
if (buttonContainer.classList.contains('scihub-processed')) return;
buttonContainer.classList.add('scihub-processed');
// Hàng 1: Sci-Hub + LibGen
const row1 = document.createElement('span');
row1.style.display = 'inline-flex';
row1.style.gap = '6px';
const scihubSpan = addLoadingIndicator(row1);
const libgenSpan = addLoadingIndicator(row1);
buttonContainer.appendChild(row1);
// Hàng 2: Anna + SciNet
const row2 = document.createElement('span');
row2.style.display = 'inline-flex';
row2.style.gap = '6px';
const annaSpan = addLoadingIndicator(row2);
const scinetSpan = addLoadingIndicator(row2);
buttonContainer.appendChild(row2);
// Hàng 3: LibSTC (riêng một hàng)
const row3 = document.createElement('span');
row3.style.display = 'flex'; // flex thì tự động block
row3.style.gap = '6px';
row3.style.marginTop = '4px';
const libstcSpan = addLoadingIndicator(row3);
buttonContainer.appendChild(row3);
// Kiểm tra PDF và cập nhật nút
checkSciHubPDF(titleLink.href, scihubSpan);
checkLibGenPDF(titleLink.textContent, libgenSpan);
fetchDOI(titleLink, (doi) => {
if (doi) {
checkAnnaPDF(doi, annaSpan);
checkSciNetPDF(doi, scinetSpan);
checkLibSTCPDF(doi, libstcSpan);
} else {
updateLink(annaSpan, '[No] Anna', '#', true);
updateLink(scinetSpan, '[No] Sci-net', '#', true);
updateLink(libstcSpan, '[No] LibSTC', '#', true);
}
});
});
}
addButtons();
new MutationObserver((mutations) => {
mutations.forEach((mutation) => mutation.addedNodes.length && addButtons());
}).observe(document.body, {childList: true, subtree: true});