Twitter DL - Click "Always Allow"!

Download twitter videos directly from your browser! (CLICK "ALWAYS ALLOW" IF PROMPTED!)

目前為 2023-08-14 提交的版本,檢視 最新版本

您需要先安裝使用者腳本管理器擴展,如 TampermonkeyGreasemonkeyViolentmonkey 之後才能安裝該腳本。

You will need to install an extension such as Tampermonkey to install this script.

您需要先安裝使用者腳本管理器擴充功能,如 TampermonkeyViolentmonkey 後才能安裝該腳本。

您需要先安裝使用者腳本管理器擴充功能,如 TampermonkeyUserscripts 後才能安裝該腳本。

你需要先安裝一款使用者腳本管理器擴展,比如 Tampermonkey,才能安裝此腳本

您需要先安裝使用者腳本管理器擴充功能後才能安裝該腳本。

(我已經安裝了使用者腳本管理器,讓我安裝!)

你需要先安裝一款使用者樣式管理器擴展,比如 Stylus,才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展,比如 Stylus,才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展,比如 Stylus,才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展後才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展後才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展後才能安裝此樣式

(我已經安裝了使用者樣式管理器,讓我安裝!)

// ==UserScript==
// @name         Twitter DL - Click "Always Allow"!
// @version      1.1
// @description  Download twitter videos directly from your browser! (CLICK "ALWAYS ALLOW" IF PROMPTED!)
// @author       realcoloride
// @license      MIT
// @namespace    https://twitter.com/*
// @match        https://twitter.com/*
// @connect      twitter-video-download.com
// @connect      twimg.com
// @icon         https://www.google.com/s2/favicons?sz=64&domain=twitter.com
// @grant        GM.xmlHttpRequest
// ==/UserScript==

(function() {
    let injectedTweets = [];
    const checkFrequency = 150; // in milliseconds
    const apiEndpoint = "https://twitter-video-download.com/fr/tweet/";
    const downloadText = "Download"

    const style = 
    `.dl-video {
        padding: 6px;
        padding-left: 5px;
        padding-right: 5px;
        margin-left: 5px;
        margin-bottom: 2px;
        border-color: black;
        border-style: none;
        border-radius: 10px;
        color: white;

        background-color: rgba(39, 39, 39, 0.46);
        font-family: Arial, Helvetica, sans-serif;
        font-size: xx-small;

        cursor: pointer;
    }

    .dl-hq {
        background-color: rgba(28, 199, 241, 0.46);
    }
    .dl-lq {
        background-color: rgba(185, 228, 138, 0.46);
    }
    .dl-gif {
        background-color: rgba(219, 117, 22, 0.46);
    }
    `;
    
    // Styles
    function injectStyles() {
        const styleElement = document.createElement("style");
        styleElement.textContent = style;

        document.head.appendChild(styleElement);
    }
    injectStyles();

    // Snippet extraction
    function getRetweetFrame(tweetElement) {
        let retweetFrame = null;
        const candidates = tweetElement.querySelectorAll(`[id^="id__"]`);

        candidates.forEach((candidate) => {
            const candidateFrame = candidate.querySelector('div[tabindex="0"][role="link"]');

            if (candidateFrame)
                retweetFrame = candidateFrame;
        });

        return retweetFrame;
    }
    function getTopBar(tweetElement, isRetweet) {
        // I know its kind of bad but it works

        let element = tweetElement;

        if (isRetweet) {
            const retweetFrame = getRetweetFrame(tweetElement);
            const videoPlayer = tweetElement.querySelector('[data-testid="videoPlayer"]');
            const videoPlayerOnRetweet = retweetFrame.querySelector('[data-testid="videoPlayer"]')

            const isVideoOnRetweet = (videoPlayer == videoPlayerOnRetweet);
            
            if (videoPlayerOnRetweet && isVideoOnRetweet) element = retweetFrame;
            else if (videoPlayerOnRetweet == null) element = tweetElement;
        }

        const userName = element.querySelector('[data-testid="User-Name"]');
        
        if (isRetweet && element != tweetElement) return userName.parentNode.parentNode;
        return userName.parentNode.parentNode.parentNode;
    }

    // Fetching
    async function getMediasFromTweetId(tweetInformation) {
        const id = tweetInformation.id;

        const payload = {
            "url": `${apiEndpoint}${id}`,
            "headers": {
                "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7",
                "accept-language": "fr-FR,fr;q=0.9,en-US;q=0.8,en;q=0.7",
                "cache-control": "max-age=0",
                "sec-ch-ua": "\"Not/A)Brand\";v=\"99\", \"Google Chrome\";v=\"115\", \"Chromium\";v=\"115\"",
                "sec-ch-ua-mobile": "?0",
                "sec-ch-ua-platform": "\"Windows\"",
                "sec-fetch-dest": "document",
                "sec-fetch-mode": "navigate",
                "sec-fetch-site": "same-origin",
                "sec-fetch-user": "?1",
                "upgrade-insecure-requests": "1"
              },
            "referrer": "https://twitter-video-download.com/fr",
            "referrerPolicy": "strict-origin-when-cross-origin",
            "body": null,
            "method": "GET",
            "mode": "cors",
            "credentials": "omit"
        };
        const request = await GM.xmlHttpRequest(payload);    
        
        let lq = null;
        let hq = null;

        try {
            const regex = /https:\/\/[a-zA-Z0-9_-]+\.twimg\.com\/[a-zA-Z0-9_\-./]+\.mp4/g;
            const text = request.responseText;
            const links = text.match(regex);
        
            // Calculate the size of a video based on resolution
            function calculateSize(resolution) {
                const parts = resolution.split("x");
                const width = parseInt(parts[0]);
                const height = parseInt(parts[1]);
                return width * height;
            }
            
            if (!links) return null;

            // Map links to objects with resolution and size
            const linkObjects = links.map(link => {
                const resolutionMatch = link.match(/\/(\d+x\d+)\//);
                const resolution = resolutionMatch ? resolutionMatch[1] : "";
                const size = calculateSize(resolution);
                return { link, resolution, size };
            });
            
            // Sort linkObjects based on size in descending order
            linkObjects.sort((a, b) => a.size - b.size);
            
            // Create a Set to track seen links and store unique links
            const uniqueLinks = new Set();
            const deduplicatedLinks = [];

            for (const obj of linkObjects) {
                if (!uniqueLinks.has(obj.link)) {
                    uniqueLinks.add(obj.link);
                    deduplicatedLinks.push(obj.link);
                }
            }

            if (tweetInformation.isGif && tweetInformation.tabIndex == "-1" ||
                links[0].startsWith('https://video.twimg.com/tweet_video/')
            ) {
                lq = links[0];
            } else {
                lq = deduplicatedLinks[0];
            
                if (deduplicatedLinks.length > 1) hq = deduplicatedLinks[deduplicatedLinks.length-1];
                // first quality is VERY bad so if can swap to second (medium) then its better
                if (deduplicatedLinks.length > 2) lq = deduplicatedLinks[1]; 
            }
        } catch (error) {
            console.error(error);
            return null;
        }

        return {lq, hq};
    }

    // Downloading
    async function downloadFile(button, url, mode, filename) {
        const baseText = `${downloadText} (${mode.toUpperCase()})`;
        
        button.disabled = true;
        button.innerText = "Downloading...";
    
        console.log(`[TwitterDL] Downloading Tweet URL (${mode.toUpperCase()}): ${url}`);
        
        function finish() {
            if (button.innerText == baseText) return;

            button.disabled = false;
            button.innerText = baseText;
        }

        GM.xmlHttpRequest({
            method: 'GET',
            url: url,
            responseType: 'blob',
            onload: function(response) {
                const blob = response.response;
                const link = document.createElement('a');

                link.href = URL.createObjectURL(blob);
                link.setAttribute('download', filename);
                link.click();

                URL.revokeObjectURL(link.href);
                button.innerText = 'Downloaded!';
                button.disabled = false;

                setTimeout(finish, 1000);
            },
            onerror: function(error) {
                console.error('[TwitterDL] Download Error:', error);
                button.innerText = 'Download Failed';
                
                setTimeout(finish, 1000);
            },
            onprogress: function(progressEvent) {
                if (progressEvent.lengthComputable) {
                    const percentComplete = Math.round((progressEvent.loaded / progressEvent.total) * 100);
                    button.innerText = `Downloading: ${percentComplete}%`;
                } else
                    button.innerText = 'Downloading...';
            }
        });
    }
    function createDownloadButton(tweetInformation, url, tag) {
        const button = document.createElement("button");
        button.hidden = true;

        const username = tweetInformation.username;
        const filename = `TwitterDL_${username}_${tweetInformation.id}`;

        button.classList.add("dl-video", `dl-${tag}`);
        button.innerText = `${downloadText} (${tag.toUpperCase()})`;
        button.setAttribute("href", url);
        button.setAttribute("download", "");
        button.addEventListener('click', async() => {
            await downloadFile(button, url, tag, filename);
        });

        button.hidden = false;

        return button;
    }
    function createDownloadButtons(tweetElement) {
        const tweetInformation = getTweetInformation(tweetElement);
        if (!tweetInformation) return;
        
        getMediasFromTweetId(tweetInformation).then((medias) => {
            if (!medias) return;

            const retweetFrame = getRetweetFrame(tweetElement);
            const isRetweet = (retweetFrame != null);

            let lowQualityButton;
            let highQualityButton;

            const lq = medias.lq;
            const hq = medias.hq;

            if (lq) lowQualityButton  = createDownloadButton(tweetInformation, lq, tweetInformation.isGif ? "gif" : "lq");
            if (hq && !tweetInformation.isGif) highQualityButton = createDownloadButton(tweetInformation, hq, "hq");
            
            const videoPlayer = isRetweet ? tweetElement.querySelector('[data-testid="videoPlayer"]') : null;
            const videoPlayerOnRetweet = isRetweet ? retweetFrame.querySelector('[data-testid="videoPlayer"]') : null;

            const topBar = getTopBar(tweetElement, isRetweet);
            const threeDotsElement = topBar.lastChild

            const isVideoOnRetweet = (videoPlayer == videoPlayerOnRetweet);
    
            if (!lowQualityButton && !highQualityButton) return;

            // Order: HQ then LQ
            if (videoPlayer != null && isRetweet && isVideoOnRetweet) {
                // Add a little side dot
                addSideTextToRetweet(tweetElement, " · ", 6, 5);

                if (highQualityButton) topBar.appendChild(highQualityButton);
                if (lowQualityButton)  topBar.appendChild(lowQualityButton);
            } else {
                if (lowQualityButton)  topBar.insertBefore(lowQualityButton, threeDotsElement);
                if (highQualityButton) topBar.insertBefore(highQualityButton, lowQualityButton);
            }
        })
    }
    function addSideTextToRetweet(tweetElement, text, forcedMargin, forcedWidth) {
        const timeElement = tweetElement.querySelector("time");
        const computedStyles = window.getComputedStyle(timeElement);

        // Make a new text based on the font and color
        const textElement = timeElement.cloneNode(true);
        textElement.innerText = text;
        textElement.setAttribute("datetime", "");

        for (const property of computedStyles) {
            textElement.style[property] = computedStyles.getPropertyValue(property);
        }

        textElement.style.overflow = "visible";
        textElement.style["padding-left"] = "4px";
        textElement.style["margin-left"] = forcedMargin || 0;

        const tweetAvatarElement = tweetElement.querySelectorAll('[data-testid="Tweet-User-Avatar"]')[1];
        const targetTweetBar = tweetAvatarElement.parentNode;

        targetTweetBar.appendChild(textElement);

        const contentWidth = textElement.scrollWidth;
        textElement.style.width = (forcedWidth || contentWidth) + 'px';
        
        injectedFallbacks.push(tweetElement);
    }

    // Page information gathering
    function getTweetsInPage() {
        return document.getElementsByTagName("article");
    }
    let injectedFallbacks = [];
    function getTweetInformation(tweetElement) {
        let information = {};

        // ID
        // Check the tweet timestamp, it has a link with the id at the end
        // In case something goes wrong, a fallback text is shown
        let id = null;
        let username = null;
        let tweetUrl = null;
        let isGif = false;
        let tabIndex = null;

        const retweetFrame = getRetweetFrame(tweetElement);
        const isRetweet = (retweetFrame != null);
        
        const videoPlayer = isRetweet ? retweetFrame.querySelector('[data-testid="videoPlayer"]') : null;

        const isPost = (isStatusUrl(window.location.href));

        tabIndex = tweetElement.getAttribute('tabindex');

        const regex = /^https:\/\/twitter\.com\/([^\/]+)\/status\/(\d+)/;
        function setInfo(url) {
            const match = url.match(regex);
            
            id = match[2];
            username = match[1];
            tweetUrl = url;
        }

        const url = window.location.href;

        try {
            setInfo(url);
        } catch {}
        
        function fallback() {
            if (injectedFallbacks.includes(tweetElement)) return;

            console.log("[TwitterDL] Twitter quote retweets from statuses are not supported yet, sorry! Throwing fallback...");

            addSideTextToRetweet(tweetElement, " · Open to Download");
        }

        try {
            if (isRetweet) {
                if (isPost) {
                    const hasRetweetVideoPlayer = (videoPlayer != null);
                    if (hasRetweetVideoPlayer)
                        fallback();
                } else fallback();
            } else {
                const timeElement = tweetElement.querySelector("time");
                const timeHref = timeElement.parentNode;
                const tweetUrl = timeHref.href;

                if (tweetUrl) setInfo(tweetUrl);
                else fallback();
            }
        } catch (error) {
            try {
                fallback();
            } catch (error) {}
        }

        // VideoPlayer element
        const videoPlayerElement = tweetElement.querySelector('[data-testid="videoPlayer"]');
        const spanElement = videoPlayerElement.querySelector('div[dir="ltr"] > span');

        if (spanElement)
            isGif = spanElement.innerText == "GIF";
        
        if (!id) return;
        information.id = id;
        information.username = username;
        information.url = tweetUrl;
        information.videoPlayer = videoPlayerElement;
        information.isGif = isGif;
        information.tabIndex = tabIndex;

        // Play button
        return information;
    }

    // Page injection
    async function injectAll() {
        const tweets = getTweetsInPage();
        for (let i = 0; i < tweets.length; i++) {
            const tweet = tweets[i];
            const alreadyInjected = injectedTweets.includes(tweet);

            if (!alreadyInjected) {
                const videoPlayer = tweet.querySelector('[data-testid="videoPlayer"]');
                const isVideo = (videoPlayer != null);
                
                if (!isVideo) continue;

                createDownloadButtons(tweet);
                injectedTweets.push(tweet);
            }
        }
    }
    function checkForInjection() {
        const tweets = getTweetsInPage();
        const shouldInject = (injectedTweets.length != tweets.length);

        if (shouldInject) injectAll();
    }

    function isStatusUrl(url) {
        const statusUrlRegex = /^https?:\/\/twitter\.com\/\w+\/status\/\d+$/;
        return statusUrlRegex.test(url);
    }
    function isValidUrl(url) {
        const tweetUrlRegex = /^https?:\/\/twitter\.com\/\w+(\/\w+)*$/;
        return tweetUrlRegex.test(url) || isStatusUrl(window.location.href);
    }
    if (isValidUrl(window.location.href)) {
        console.log("[TwitterDL] by (real)coloride - 2023 // Loading... ");

        setInterval(async() => {
            try {
                checkForInjection();
            } catch (error) {
                console.error("[TwitterDL] Fatal error: ", error);
            }
        }, checkFrequency);
    }
})();