133 lines
4.3 KiB
JavaScript
133 lines
4.3 KiB
JavaScript
// 点击"下载视频"时执行：优先从页面内嵌数据 RENDER_DATA 精确提取当前视频地址，
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// 其次才用嗅探列表兜底。
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(function () {
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try {
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var pageUrl = location.href;
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// 从 URL 提取视频 ID
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var videoId = "";
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var m = pageUrl.match(/[?&]modal_id=(\d+)/);
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if (m) videoId = m[1];
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if (!videoId) {
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var m0 = pageUrl.match(/[?&]aweme_id=(\d+)/);
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if (m0) videoId = m0[1];
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}
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if (!videoId) {
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var m2 = pageUrl.match(/\/(?:video|note)\/(\d+)/);
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if (m2) videoId = m2[1];
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}
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// === 方案一：从 RENDER_DATA 里精确找当前视频的播放地址 ===
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var renderVideoUrl = "";
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var renderAudioUrl = "";
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try {
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var rd = document.getElementById("RENDER_DATA");
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if (rd && rd.textContent) {
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var decoded = decodeURIComponent(rd.textContent);
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// 在 JSON 里找 aweme_id 等于 videoId 的节点，提取其 video.play_addr 或 play_addr 列表
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// 用正则粗匹配，避免完整 JSON 解析的复杂性
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var idx = decoded.indexOf(videoId);
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while (idx >= 0) {
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// 在这个 ID 附近找 playApi / play_addr / url_list
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var chunk = decoded.substring(Math.max(0, idx - 200), idx + 5000);
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// 找 DASH 格式的视频轨和音频轨
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var vMatches = chunk.match(/https?:\/\/[^"\\]+media-video[^"\\]*/gi);
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var aMatches = chunk.match(/https?:\/\/[^"\\]+media-audio[^"\\]*/gi);
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if (vMatches && vMatches.length) {
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renderVideoUrl = vMatches[vMatches.length - 1];
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if (aMatches && aMatches.length) {
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renderAudioUrl = aMatches[aMatches.length - 1];
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}
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break;
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}
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// 找普通 mp4 直链
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var mp4Matches = chunk.match(/https?:\/\/[^"\\]*\.mp4[^"\\]*/gi);
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if (mp4Matches && mp4Matches.length) {
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renderVideoUrl = mp4Matches[mp4Matches.length - 1];
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break;
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}
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idx = decoded.indexOf(videoId, idx + 1);
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}
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}
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} catch (e) { /* RENDER_DATA 解析失败就走嗅探兜底 */ }
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// === 方案二：选正在播放的 <video> 元素 ===
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var vids = Array.prototype.slice.call(document.querySelectorAll("video"));
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var best = null;
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for (var i = 0; i < vids.length; i++) {
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var v = vids[i];
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if (!v.paused && v.currentTime > 0) { best = v; break; }
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}
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if (!best) {
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for (var j = 0; j < vids.length; j++) {
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var v2 = vids[j];
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if (v2.videoWidth > 0 || (!isNaN(v2.duration) && v2.duration > 0 && v2.currentTime > 0)) {
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best = v2;
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break;
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}
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}
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}
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if (!best) best = vids[0];
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var current = "";
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var playable = true;
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if (best) {
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current = best.currentSrc || best.src || "";
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if (!current) {
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var s = best.querySelector && best.querySelector("source");
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if (s) current = s.src || s.getAttribute("src") || "";
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}
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if (best.networkState === 0) playable = false;
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}
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// === 方案三：嗅探列表兜底 ===
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var all = window.__mediaUrls || [];
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var videoTracks = [];
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var audioTracks = [];
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var otherMedia = [];
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for (var k = 0; k < all.length; k++) {
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var u = all[k];
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if (/media-video/i.test(u)) videoTracks.push(u);
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else if (/media-audio/i.test(u)) audioTracks.push(u);
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else otherMedia.push(u);
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}
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function pickLast(arr) {
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return arr.length ? arr[arr.length - 1] : "";
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}
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var dashVideo = pickLast(videoTracks);
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var dashAudio = pickLast(audioTracks);
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// 如果 RENDER_DATA 找到了，优先用它
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if (renderVideoUrl) {
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dashVideo = renderVideoUrl;
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if (renderAudioUrl) dashAudio = renderAudioUrl;
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}
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var title = document.title || "";
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var h1 = document.querySelector("h1");
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if (h1 && h1.innerText) title = h1.innerText;
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return JSON.stringify({
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current: current || "",
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playable: playable,
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usesMse: !!window.__usesMse || /^blob:/i.test(current),
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title: title,
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pageUrl: pageUrl,
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videoId: videoId,
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sniffed: otherMedia.slice(-60),
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dashVideo: dashVideo,
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dashAudio: dashAudio,
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m3u8Blobs: (window.__m3u8Blobs || []).slice(-1),
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});
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} catch (e) {
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return JSON.stringify({
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current: "",
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title: document.title || "",
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pageUrl: location.href,
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error: String(e),
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});
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}
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})();
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