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在Instagram页面加入下载按钮与开启按钮，透过这些按钮可以下载或开启大头贴与贴文、限时动态、Highlight中的照片或影片
当前为
// ==UserScript==
// @name Instagram Download Button
// @name:zh-TW Instagram 下載器
// @name:zh-CN Instagram 下载器
// @name:ja Instagram ダウンローダー
// @name:ko Instagram 다운로더
// @name:es Descargador de Instagram
// @name:fr Téléchargeur Instagram
// @name:hi इंस्टाग्राम डाउनलोडर
// @name:ru Загрузчик Instagram
// @namespace https://github.com/y252328/Instagram_Download_Button
// @version 1.13
// @compatible chrome
// @compatible firefox
// @compatible edge
// @description Add the download button and the open button to download or open profile picture and media in the posts, stories, and highlights in Instagram
// @description:zh-TW 在Instagram頁面加入下載按鈕與開啟按鈕，透過這些按鈕可以下載或開啟大頭貼與貼文、限時動態、Highlight中的照片或影片
// @description:zh-CN 在Instagram页面加入下载按钮与开启按钮，透过这些按钮可以下载或开启大头贴与贴文、限时动态、Highlight中的照片或影片
// @description:ja メディアをダウンロードまたは開くためのボタンを追加します
// @description:ko 미디어를 다운로드하거나 여는 버튼을 추가합니다
// @description:es Agregue botones para descargar o abrir medios
// @description:fr Ajoutez des boutons pour télécharger ou ouvrir des médias
// @description:hi मीडिया को डाउनलोड या खोलने के लिए बटन जोड़ें।
// @description:ru Добавьте кнопки для загрузки или открытия медиа
// @author ZhiYu
// @match https://www.instagram.com/*
// @grant none
// @license MIT
// ==/UserScript==
(function () {
'use strict';
// =================
// = Options =
// =================
// Old method is faster than new method, but not work and get highest resolution media sometime
const disableNewUrlFetchMethod = false;
const prefetchAndAttachLink = true; // add link into the button elements
const postFilenameTemplate = '%id%-%datetime%-%medianame%';
const storyFilenameTemplate = postFilenameTemplate;
// ==================
function yyyymmdd(date) {
// ref: https://stackoverflow.com/questions/3066586/get-string-in-yyyymmdd-format-from-js-date-object?page=1&tab=votes#tab-top
var mm = date.getMonth() + 1; // getMonth() is zero-based
var dd = date.getDate();
return [date.getFullYear(), (mm > 9 ? '' : '0') + mm, (dd > 9 ? '' : '0') + dd].join('');
}
var svgDownloadBtn = `<svg version="1.1" id="Capa_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" height="24" width="24"
viewBox="0 0 477.867 477.867" style="fill:%color;" xml:space="preserve">
<g>
<path d="M443.733,307.2c-9.426,0-17.067,7.641-17.067,17.067v102.4c0,9.426-7.641,17.067-17.067,17.067H68.267
c-9.426,0-17.067-7.641-17.067-17.067v-102.4c0-9.426-7.641-17.067-17.067-17.067s-17.067,7.641-17.067,17.067v102.4
c0,28.277,22.923,51.2,51.2,51.2H409.6c28.277,0,51.2-22.923,51.2-51.2v-102.4C460.8,314.841,453.159,307.2,443.733,307.2z"/>
</g>
<g>
<path d="M335.947,295.134c-6.614-6.387-17.099-6.387-23.712,0L256,351.334V17.067C256,7.641,248.359,0,238.933,0
s-17.067,7.641-17.067,17.067v334.268l-56.201-56.201c-6.78-6.548-17.584-6.36-24.132,0.419c-6.388,6.614-6.388,17.099,0,23.713
l85.333,85.333c6.657,6.673,17.463,6.687,24.136,0.031c0.01-0.01,0.02-0.02,0.031-0.031l85.333-85.333
C342.915,312.486,342.727,301.682,335.947,295.134z"/>
</g>
</svg>`;
var svgNewtabBtn = `<svg id="Capa_1" style="fill:%color;" viewBox="0 0 482.239 482.239" xmlns="http://www.w3.org/2000/svg" height="24" width="24">
<path d="m465.016 0h-344.456c-9.52 0-17.223 7.703-17.223 17.223v86.114h-86.114c-9.52 0-17.223 7.703-17.223 17.223v344.456c0 9.52 7.703 17.223 17.223 17.223h344.456c9.52 0 17.223-7.703 17.223-17.223v-86.114h86.114c9.52 0 17.223-7.703 17.223-17.223v-344.456c0-9.52-7.703-17.223-17.223-17.223zm-120.56 447.793h-310.01v-310.01h310.011v310.01zm103.337-103.337h-68.891v-223.896c0-9.52-7.703-17.223-17.223-17.223h-223.896v-68.891h310.011v310.01z"/>
</svg>`;
document.addEventListener('keydown', keyDownHandler);
function keyDownHandler(event) {
if (window.location.href === 'https://www.instagram.com/') return;
if (event.altKey && event.key === 'k') {
let buttons = document.getElementsByClassName('download-btn');
if (buttons.length > 0) {
let mockEvent = { currentTarget: buttons[buttons.length - 1] };
if (prefetchAndAttachLink) onMouseInHandler(mockEvent);
onClickHandler(mockEvent);
}
}
if (event.altKey && event.key === 'i') {
let buttons = document.getElementsByClassName('newtab-btn');
if (buttons.length > 0) {
let mockEvent = { currentTarget: buttons[buttons.length - 1] };
if (prefetchAndAttachLink) onMouseInHandler(mockEvent);
onClickHandler(mockEvent);
}
}
if (event.altKey && event.key === 'l') {
// right arrow
let buttons = document.getElementsByClassName('coreSpriteRightChevron');
if (buttons.length > 0) {
buttons[0].click();
}
}
if (event.altKey && event.key === 'j') {
// left arrow
let buttons = document.getElementsByClassName('coreSpriteLeftChevron');
if (buttons.length > 0) {
buttons[0].click();
}
}
}
var checkExistTimer = setInterval(function () {
let sharePostSelector = 'article section span button';
let storySelector = 'header button > div';
let profileSelector = 'header section svg circle';
// Thanks for Jenie providing color check code
// http://greasyfork.icu/zh-TW/scripts/406535-instagram-download-button/discussions/122185
let iconColor = getComputedStyle(document.body).backgroundColor === 'rgb(0, 0, 0)' ? 'white' : 'black';
// check profile
if (document.getElementsByClassName('custom-btn').length === 0) {
if (document.querySelector(profileSelector)) {
addCustomBtn(document.querySelector(profileSelector), iconColor, append2Header);
}
}
// check post
let articleList = document.querySelectorAll('article');
for (let i = 0; i < articleList.length; i++) {
if (articleList[i].querySelector(sharePostSelector) && articleList[i].getElementsByClassName('custom-btn').length === 0) {
addCustomBtn(articleList[i].querySelector(sharePostSelector), iconColor, append2Post);
}
}
// check story
if (document.getElementsByClassName('custom-btn').length === 0) {
if (document.querySelector(storySelector)) {
addCustomBtn(document.querySelector(storySelector), 'white', append2Post);
}
}
}, 500);
function append2Header(node, btn) {
node.parentNode.parentNode.parentNode.appendChild(btn, node.parentNode.parentNode);
}
function append2Post(node, btn) {
node.parentNode.parentNode.appendChild(btn);
}
function addCustomBtn(node, iconColor, appendNode) {
// add download button and set event handlers
// add newtab button
let newtabBtn = createCustomBtn(svgNewtabBtn, iconColor, 'newtab-btn', '16px');
appendNode(node, newtabBtn);
// add download button
let downloadBtn = createCustomBtn(svgDownloadBtn, iconColor, 'download-btn', '14px');
appendNode(node, downloadBtn);
if (prefetchAndAttachLink) {
onMouseInHandler({ currentTarget: newtabBtn });
onMouseInHandler({ currentTarget: downloadBtn });
}
}
function createCustomBtn(svg, iconColor, className, marginLeft) {
let newBtn = document.createElement('a');
newBtn.innerHTML = svg.replace('%color', iconColor);
newBtn.setAttribute('class', 'custom-btn ' + className);
newBtn.setAttribute('target', '_blank');
newBtn.setAttribute('style', 'cursor: pointer;margin-left: ' + marginLeft + ';margin-top: 8px;');
newBtn.onclick = onClickHandler;
if (prefetchAndAttachLink) newBtn.onmouseenter = onMouseInHandler;
if (className.includes('newtab')) {
newBtn.setAttribute('title', 'Open in new tab');
} else {
newBtn.setAttribute('title', 'Download');
}
return newBtn;
}
function onClickHandler(e) {
// handle button click
let target = e.currentTarget;
e.stopPropagation();
e.preventDefault();
if (window.location.pathname.includes('stories')) {
storyOnClicked(target);
} else if (document.querySelector('header') && document.querySelector('header').contains(target)) {
profileOnClicked(target);
} else {
postOnClicked(target);
}
}
function onMouseInHandler(e) {
let target = e.currentTarget;
if (!prefetchAndAttachLink) return;
if (window.location.pathname.includes('stories')) {
storyOnMouseIn(target);
} else if (document.querySelector('header') && document.querySelector('header').contains(target)) {
profileOnMouseIn(target);
} else {
postOnMouseIn(target);
}
}
// ================================
// ==== Profile ====
// ================================
function profileOnMouseIn(target) {
let url = profileGetUrl(target);
target.setAttribute('href', url);
}
function profileOnClicked(target) {
// extract profile picture url and download or open it
let url = profileGetUrl(target);
if (url.length > 0) {
// check url
if (target.getAttribute('class').includes('download-btn')) {
// generate filename
const filename = document.querySelector('header h2').textContent;
downloadResource(url, filename);
} else {
// open url in new tab
openResource(url);
}
}
}
// ================================
// ==== Post ====
// ================================
function profileGetUrl(target) {
let img = document.querySelector('header img');
let url = img.getAttribute('src');
return url;
}
async function postOnMouseIn(target) {
let articleNode = postGetArticleNode(target);
let { url } = await postGetUrl(target, articleNode);
target.setAttribute('href', url);
}
async function postOnClicked(target) {
// extract url from target post and download or open it
let articleNode = postGetArticleNode(target);
let { url, mediaIndex } = await postGetUrl(target, articleNode);
// ==============================
// = download or open media url =
// ==============================
if (url.length > 0) {
// check url
if (target.getAttribute('class').includes('download-btn')) {
let mediaName = url
.split('?')[0]
.split('\\')
.pop()
.split('/')
.pop();
mediaName = mediaName.substring(0, mediaName.lastIndexOf('.'));
let datetime = new Date(articleNode.querySelector('time').getAttribute('datetime'));
datetime =
yyyymmdd(datetime) +
'_' +
datetime
.toTimeString()
.split(' ')[0]
.replace(/:/g, '');
let posterName = articleNode
.querySelector('header a')
.getAttribute('href')
.replace(/\//g, '');
let postId = articleNode
.querySelector('a time')
.closest('a')
.getAttribute('href')
.match(/^\/p\/([^/]+)\//)[1];
let filename = filenameFormat(postFilenameTemplate, posterName, datetime, mediaName, postId, mediaIndex);
downloadResource(url, filename);
} else {
// open url in new tab
openResource(url);
}
}
}
function postGetArticleNode(target) {
let articleNode = target;
while (articleNode && articleNode.tagName !== 'ARTICLE') {
articleNode = articleNode.parentNode;
}
return articleNode;
}
async function postGetUrl(target, articleNode) {
// meta[property="og:video"]
let list = articleNode.querySelectorAll('li[style][class]');
let url = null;
let mediaIndex = 0;
if (list.length === 0) {
// single img or video
if (!disableNewUrlFetchMethod) url = await getUrlFromInfoApi(articleNode);
if (url == null) {
if (articleNode.querySelector('article div > video')) {
// media type is video
let videoElem = articleNode.querySelector('article div > video');
url = videoElem.getAttribute('src');
if (videoElem.hasAttribute('videoURL')) {
url = videoElem.getAttribute('videoURL');
} else if (url === null || url.includes('blob')) {
url = await fetchVideoURL(articleNode, videoElem);
}
} else if (articleNode.querySelector('article div[role] div > img')) {
// media type is image
url = articleNode.querySelector('article div[role] div > img').getAttribute('src');
} else {
console.log('Err: not find media at handle post single');
}
}
} else {
// multiple imgs or videos
const postView = location.pathname.startsWith('/p/');
const dotsElements = [...articleNode.querySelector(`:scope > div > div:nth-child(${postView ? 1 : 2}) > div > div:nth-child(2)`).children];
mediaIndex = [...dotsElements].reduce((result, element, index) => (element.classList.length === 2 ? index : result), null);
if (!disableNewUrlFetchMethod) url = await getUrlFromInfoApi(articleNode, mediaIndex);
if (url == null) {
const listElements = [...articleNode.querySelectorAll(`:scope > div > div:nth-child(${postView ? 1 : 2}) > div > div:nth-child(1) ul li[style*="translateX"]`)];
const listElementWidth = Math.max(...listElements.map(element => element.clientWidth));
const positionsMap = listElements.reduce((result, element) => {
// console.log(Number(element.style.transform.match(/-?(\d+)/)[1]));
const position = Math.round(Number(element.style.transform.match(/-?(\d+)/)[1]) / listElementWidth);
return { ...result, [position]: element };
}, {});
console.log({ dotsElements, listElements, listElementWidth, positionsMap });
const node = positionsMap[mediaIndex];
if (node.querySelector('video')) {
// media type is video
let videoElem = node.querySelector('video');
url = videoElem.getAttribute('src');
if (videoElem.hasAttribute('videoURL')) {
url = videoElem.getAttribute('videoURL');
} else if (url === null || url.includes('blob')) {
url = await fetchVideoURL(articleNode, videoElem);
}
} else if (node.querySelector('img')) {
// media type is image
url = node.querySelector('img').getAttribute('src');
}
}
}
return { url, mediaIndex };
}
let infoCache = {};
async function getUrlFromInfoApi(articleNode, mediaIdx = 0) {
// return media url if found else return null
// fetch flow:
// 1. find post id
// 2. use step1 post id to send request to get post page
// 3. find media id from the reponse text of step2
// 4. find app id in clicked page
// 5. send info api request with media id and app id
// 6. get media url from response json
try {
const appIdPattern = /"X-IG-App-ID":"([\d]+)"/
const mediaIdPattern = /instagram:\/\/media\?id=(\d+)/
function findAppId() {
let bodyScripts = document.querySelectorAll("body > script");
for (let i = 0; i < bodyScripts.length; ++i) {
let match = bodyScripts[i].text.match(appIdPattern);
if (match) return match[1];
}
console.log("Cannot find app id");
return null;
}
function findPostId() {
const timeSelector = 'time._aaqe';
let nodeWalker = articleNode.querySelector(timeSelector);
for (let i = 0; i < 10; ++i) {
nodeWalker = nodeWalker.parentNode;
if (nodeWalker.tagName === "A") {
break;
}
}
if (nodeWalker.tagName === "A") {
let link = nodeWalker.getAttribute('href');
let match = link.match(/p\/([A-Za-z0-9_]+)\//);
if (match) return match[1];
}
console.log('Cannot find post id');
return null;
}
async function findMediaId(postId) {
let postUrl = `https://www.instagram.com/p/${postId}`;
let text = '';
if (window.location.href === postUrl) {
text = document.head.innerHTML;
} else {
if (!postUrl) return null;
let resp = await fetch(postUrl);
text = await resp.text();
// trim reponse text in order to reduce search time
text = text.substring(text.indexOf("<head>"), text.indexOf("</head>"));
}
let idMatch = text.match(mediaIdPattern);
if (!idMatch) return null;
return idMatch[1];
}
function getImgOrVedioUrl(item) {
if ("video_versions" in item) {
return item.video_versions[0].url;
} else {
return item.image_versions2.candidates[0].url;
}
}
let appId = findAppId();
if (!appId) return null;
let headers = {
method: 'GET',
headers: {
Accept: '*/*',
'X-IG-App-ID': appId
},
credentials: 'include',
mode: 'cors'
};
let postId = await findPostId();
if (!(postId in infoCache)) {
let mediaId = await findMediaId(postId);
if (!mediaId) return null;
let url = 'https://i.instagram.com/api/v1/media/' + mediaId + '/info/';
let resp = await fetch(url, headers);
let respJson = await resp.json();
infoCache[postId] = respJson;
}
let infoJson = infoCache[postId];
if ('carousel_media' in infoJson.items[0]) {
// multi-media post
return getImgOrVedioUrl(infoJson.items[0].carousel_media[mediaIdx]);
} else {
// single media post
return getImgOrVedioUrl(infoJson.items[0]);
}
} catch (e) {
console.log(`Uncatched in getUrlFromInfoApi(): ${e}\n${e.stack}`);
return null;
}
}
async function fetchVideoURL(articleNode, videoElem) {
let poster = videoElem.getAttribute('poster');
let timeNodes = articleNode.querySelectorAll('time');
// special thanks 孙年忠 (http://greasyfork.icu/en/scripts/406535-instagram-download-button/discussions/120159)
let posterUrl = timeNodes[timeNodes.length - 1].parentNode.parentNode.href;
const posterPattern = /\/([^\/?]*)\?/;
let posterMatch = poster.match(posterPattern);
let postFileName = posterMatch[1];
let resp = await fetch(posterUrl);
let content = await resp.text();
// special thanks to 孙年忠 for the pattern (http://greasyfork.icu/zh-TW/scripts/406535-instagram-download-button/discussions/116675)
const pattern = new RegExp(`${postFileName}.*?video_versions.*?url":("[^"]*")`, 's');
let match = content.match(pattern);
let videoUrl = JSON.parse(match[1]);
videoUrl = videoUrl.replace(/^(?:https?:\/\/)?(?:[^@\/\n]+@)?(?:www\.)?([^:\/?\n]+)/g, 'https://scontent.cdninstagram.com');
videoElem.setAttribute('videoURL', videoUrl);
return videoUrl;
}
// ================================
// ==== Story ====
// ================================
function storyOnMouseIn(target) {
let sectionNode = storyGetSectionNode(target);
let url = storyGetUrl(target, sectionNode);
target.setAttribute('href', url);
}
function storyOnClicked(target) {
// extract url from target story and download or open it
let sectionNode = storyGetSectionNode(target);
let url = storyGetUrl(target, sectionNode);
// download or open media url
if (target.getAttribute('class').includes('download-btn')) {
let mediaName = url
.split('?')[0]
.split('\\')
.pop()
.split('/')
.pop();
mediaName = mediaName.substring(0, mediaName.lastIndexOf('.'));
let datetime = new Date(sectionNode.querySelector('time').getAttribute('datetime'));
datetime =
yyyymmdd(datetime) +
'_' +
datetime
.toTimeString()
.split(' ')[0]
.replace(/:/g, '');
let posterName = sectionNode
.querySelector('header a')
.getAttribute('href')
.replace(/\//g, '');
let filename = filenameFormat(storyFilenameTemplate, posterName, datetime, mediaName);
downloadResource(url, filename);
} else {
// open url in new tab
openResource(url);
}
}
function storyGetSectionNode(target) {
let sectionNode = target;
while (sectionNode && sectionNode.tagName !== 'SECTION') {
sectionNode = sectionNode.parentNode;
}
return sectionNode;
}
function storyGetUrl(target, sectionNode) {
let url = '';
if (sectionNode.querySelector('video > source')) {
url = sectionNode.querySelector('video > source').getAttribute('src');
} else if (sectionNode.querySelector('img[decoding="sync"]')) {
let img = sectionNode.querySelector('img[decoding="sync"]');
url = img.srcset.split(/ \d+w/g)[0].trim(); // extract first src from srcset attr. of img
if (url.length > 0) {
return url;
}
url = sectionNode.querySelector('img[decoding="sync"]').getAttribute('src');
}
return url;
}
function filenameFormat(template, id, datetime, medianame, postId = +new Date(), mediaIndex = '0') {
let filename = template;
filename = filename.replace(new RegExp('%id%', 'g'), id);
filename = filename.replace(new RegExp('%datetime%', 'g'), datetime);
filename = filename.replace(new RegExp('%medianame%', 'g'), medianame);
filename = filename.replace(new RegExp('%postId%', 'g'), postId)
filename = filename.replace(new RegExp('%mediaIndex%', 'g'), mediaIndex);
return filename;
}
function openResource(url) {
// open url in new tab
var a = document.createElement('a');
a.href = url;
a.setAttribute('target', '_blank');
document.body.appendChild(a);
a.click();
a.remove();
}
function forceDownload(blob, filename, extension) {
// ref: https://stackoverflow.com/questions/49474775/chrome-65-blocks-cross-origin-a-download-client-side-workaround-to-force-down
var a = document.createElement('a');
a.download = filename + '.' + extension;
a.href = blob;
// For Firefox https://stackoverflow.com/a/32226068
document.body.appendChild(a);
a.click();
a.remove();
}
// Current blob size limit is around 500MB for browsers
function downloadResource(url, filename) {
if (url.startsWith('blob:')) {
forceDownload(url, filename, 'mp4');
return;
}
console.log(url);
// ref: https://stackoverflow.com/questions/49474775/chrome-65-blocks-cross-origin-a-download-client-side-workaround-to-force-down
if (!filename)
filename = url
.split('\\')
.pop()
.split('/')
.pop();
fetch(url, {
headers: new Headers({
Origin: location.origin,
}),
mode: 'cors',
})
.then(response => response.blob())
.then(blob => {
const extension = blob.type.split('/').pop();
let blobUrl = window.URL.createObjectURL(blob);
forceDownload(blobUrl, filename, extension);
console.log(blobUrl);
})
.catch(e => console.error(e));
}
})();