247 lines
12 KiB
TypeScript
247 lines
12 KiB
TypeScript
// src/scrapeDouyin.ts
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import { BrowserContext, Page, chromium, type Response } from 'playwright';
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import { prisma } from '@/lib/prisma';
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import { uploadFile, generateUniqueFileName } from '@/lib/minio';
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import { createCamelCompatibleProxy } from '@/app/api/fetcher/utils';
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import { waitForFirstResponse, waitForResponseWithTimeout, safeJson, downloadBinary } from '@/app/api/fetcher/network';
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import { pickBestPlayAddr, extractFirstFrame } from '@/app/api/fetcher/media';
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import { handleImagePost } from '@/app/api/fetcher/uploader';
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import { saveToDB, saveImagePostToDB } from '@/app/api/fetcher/persist';
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import chalk from 'chalk';
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import { acquireBrowserContext, releaseBrowserContext } from '@/app/api/fetcher/browser';
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const DETAIL_PATH = '/aweme/v1/web/aweme/detail/';
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const COMMENT_PATH = '/aweme/v1/web/comment/list/';
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const POST_PATH = '/aweme/v1/web/aweme/post/'
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async function readPostMem(context: BrowserContext, page: Page) {
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const md = await page.evaluate(() => {
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// @ts-ignore
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let data = window.__pace_captured__.find(i => i[1] && i[1].includes(`"awemeId":`))[1]
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return JSON.parse(data.slice(data.indexOf("{")).replaceAll("]\n", ''))
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// return {aweme: { detail: {} } };
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}).catch(() => null);
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let aweme_mem = md?.aweme?.detail as DouyinImageAweme;
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if (!aweme_mem) throw new Error('页面内存数据中未找到作品详情');
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// @ts-ignore
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aweme_mem.author = aweme_mem.authorInfo
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const comments = md.comment ? createCamelCompatibleProxy<DouyinCommentResponse>(md.comment) : null;
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const aweme = createCamelCompatibleProxy(aweme_mem);
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return { aweme, comments }
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}
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export class ScrapeError extends Error {
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constructor(
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message: string,
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public statusCode: number = 500,
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public code?: string
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) {
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super(message);
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this.name = 'ScrapeError';
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}
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}
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export async function scrapeDouyin(url: string) {
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console.log(chalk.blue('🚀 启动共享 Chromium 浏览器...'));
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const context = await acquireBrowserContext();
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const page = await context.newPage();
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console.log(chalk.cyan(`📄 正在访问: ${chalk.underline(url)}`));
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await page.addInitScript(() => {
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// 建一个全局容器存捕获的数据
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(window as any).__pace_captured__ = [];
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// 用 Proxy 包装一个数组，拦截 push
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const captured = (window as any).__pace_captured__;
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const proxyArr = new Proxy([] as any[], {
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get(target, prop, receiver) {
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if (prop === 'push') {
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return (...items: any[]) => {
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try { captured.push(...items); } catch { }
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return Array.prototype.push.apply(target, items);
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};
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}
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return Reflect.get(target, prop, receiver);
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},
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set(target, prop, value, receiver) {
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// 兼容站点可能直接赋初始数组： self.__pace_f = [a,b]
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if (prop === 'length') return Reflect.set(target, prop, value, receiver);
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return Reflect.set(target, prop, value, receiver);
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}
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});
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(self as any).__pace_f = proxyArr;
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(window as any).__pace_f = proxyArr;
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});
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try {
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// 先注册“先到先得”的监听，再导航，避免漏包
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const firstTypePromise = waitForFirstResponse(context, [
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{ key: 'detail', test: (r: Response) => r.url().includes(DETAIL_PATH) && r.status() === 200 },
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{ key: 'post', test: (r: Response) => r.url().includes(POST_PATH) && r.status() === 200 },
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], 9_000); // 整体 9s 兜底超时，不逐个等待
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// 评论只做短时“有就用、没有不等”的监听
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const commentPromise = waitForResponseWithTimeout(
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context, (r: Response) => r.url().includes(COMMENT_PATH) && r.status() === 200, 8_000
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).catch(() => null);
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await page.goto(url, { waitUntil: 'domcontentloaded', timeout: 60_000 });
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// 查找页面中是否存在 "视频不存在" 的提示
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const isNotFound = await page.locator('text=视频不存在').count().then(count => count > 0).catch(() => false);
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if (isNotFound) {
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console.error(chalk.red('✗ 视频不存在或已被删除'));
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throw new ScrapeError('视频不存在或已被删除', 404, 'VIDEO_NOT_FOUND');
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}
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try {
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// 优先尝试从内存读取图文数据
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let { aweme, comments } = await readPostMem(context, page);
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console.log(chalk.green('✓ 从内存读取图文数据成功'));
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const uploads = await handleImagePost(context, aweme);
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if (!comments) {
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console.warn(chalk.yellow('⚠ 从内存读取评论数据失败，尝试从网络请求获取评论数据'));
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const commentRes = await commentPromise;
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comments = commentRes && await safeJson<DouyinCommentResponse>(commentRes);
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if (!comments) {
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console.warn(chalk.yellow('⚠ 无法从内存读取评论数据，且网络请求也未返回评论数据'));
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comments = { comments: [], total: 0, status_code: 0 };
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} else {
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console.log(chalk.green('✓ 从网络请求获取评论数据成功'));
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}
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} else {
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console.log(chalk.green('✓ 从内存读取评论数据成功'));
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}
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const saved = await saveImagePostToDB(context, aweme, comments, uploads); // 传递完整 JSON
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console.log(chalk.green.bold('✓ 图文作品保存成功'));
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return { type: "image", ...saved };
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} catch {
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}
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const commentRes = await commentPromise;
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const firstType = await firstTypePromise;
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if (!firstType) {
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console.error(chalk.red('✗ 既无法从内存读取数据,也无法从网络获得数据'));
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throw new ScrapeError('无法获取作品数据,可能是网络问题或作品已下架', 404, 'NO_DATA');
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}
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console.log(chalk.cyan(`📡 检测到作品类型: ${chalk.bold(firstType.key === 'post' ? '图文' : '视频')}`));
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let comments = commentRes && await safeJson<DouyinCommentResponse>(commentRes);
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if (!comments) {
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console.warn(chalk.yellow('⚠ 无法从内存读取评论数据，且网络请求也未返回评论数据'));
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comments = { comments: [], total: 0, status_code: 0 };
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}
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// 分支：视频 or 图文（两者只会有一个命中，先到先得）
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if (firstType.key === 'post') {
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// 图文作品
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const postJson = await safeJson<DouyinPostListResponse>(firstType.response);
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if (!postJson?.aweme_list?.length) throw new ScrapeError('图文作品响应为空', 404, 'EMPTY_POST_RESPONSE');
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const currentURL = page.url();
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const target_aweme_id = currentURL.split('/').at(-1);
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const awemeList = postJson.aweme_list as unknown as DouyinImageAweme[];
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let aweme = awemeList.find((pt: DouyinImageAweme) => pt.aweme_id === target_aweme_id);
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if (!aweme) {
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throw new ScrapeError('无法找到目标作品,可能已被删除', 404, 'POST_NOT_FOUND');
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}
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const uploads = await handleImagePost(context, aweme);
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const saved = await saveImagePostToDB(context, aweme, comments, uploads, postJson); // 传递完整 JSON
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console.log(chalk.green.bold('✓ 图文作品保存成功'));
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return { type: "image", ...saved };
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} else if (firstType.key === 'detail') {
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// 视频作品
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const detail = (await safeJson<DouyinVideoDetailResponse>(firstType.response))!;
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// 找到比特率最高的 url
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const bestPlayAddr = pickBestPlayAddr(
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detail?.aweme_detail?.video.bit_rate
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);
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const bestVUrl = bestPlayAddr?.url_list?.[0];
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const fps = bestPlayAddr?.FPS ?? null; // 提取 FPS
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console.log(chalk.cyan(`📹 最佳视频 URL: ${chalk.dim(bestVUrl)}`));
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console.log(chalk.cyan(`🎞️ 视频帧率: ${chalk.bold(fps || 'N/A')} FPS`));
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if (bestPlayAddr?.width && bestPlayAddr?.height) {
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console.log(chalk.cyan(`📐 视频分辨率: ${chalk.bold(`${bestPlayAddr.width}x${bestPlayAddr.height}`)}`));
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}
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// 下载视频并上传至 MinIO，获取外链
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let uploadedUrl: string | undefined;
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let coverUrl: string | undefined;
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if (bestVUrl && detail?.aweme_detail) {
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console.log(chalk.blue('⬇️ 正在下载视频...'));
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const { buffer, contentType, ext } = await downloadBinary(context, bestVUrl);
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const awemeId = detail.aweme_detail.aweme_id;
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const fileName = generateUniqueFileName(`${awemeId}.${ext}`, 'douyin/videos');
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console.log(chalk.blue('⬆️ 正在上传视频到 MinIO...'));
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uploadedUrl = await uploadFile(buffer, fileName, { 'Content-Type': contentType });
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console.log(chalk.green(`✓ 视频上传成功: ${chalk.underline(uploadedUrl)}`));
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// 提取首帧作为封面并上传
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try {
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console.log(chalk.blue('🖼️ 正在提取视频封面...'));
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const cover = await extractFirstFrame(buffer);
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if (cover) {
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const coverName = generateUniqueFileName(`${awemeId}.jpg`, 'douyin/covers');
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coverUrl = await uploadFile(cover.buffer, coverName, { 'Content-Type': cover.contentType });
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console.log(chalk.green(`✓ 封面上传成功: ${chalk.underline(coverUrl)}`));
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}
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} catch (e) {
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console.warn(chalk.yellow(`⚠ 提取封面失败，跳过: ${(e as Error)?.message || e}`));
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}
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}
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const saved = await saveToDB(context, detail, comments, uploadedUrl, bestPlayAddr?.width, bestPlayAddr?.height, coverUrl, fps ?? undefined);
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console.log(chalk.green.bold('✓ 视频作品保存成功'));
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return { type: "video", ...saved };
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} else {
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throw new ScrapeError('无法判定作品类型,接口响应异常', 500, 'UNKNOWN_TYPE');
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}
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} catch (error) {
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// 如果是我们自定义的错误,直接抛出
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if (error instanceof ScrapeError) {
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throw error;
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}
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// 处理其他类型的错误
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const errMsg = (error as Error)?.message || String(error);
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console.error(chalk.red(`✗ 爬取失败: ${errMsg}`));
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// 根据错误类型返回不同的状态码
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if (errMsg.includes('timeout') || errMsg.includes('超时')) {
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throw new ScrapeError('请求超时,请稍后重试', 408, 'TIMEOUT');
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}
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if (errMsg.includes('页面内存数据中未找到作品详情')) {
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throw new ScrapeError('作品数据加载失败', 404, 'DATA_NOT_LOADED');
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}
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if (errMsg.includes('net::')) {
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throw new ScrapeError('网络连接失败', 503, 'NETWORK_ERROR');
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}
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// 默认服务器错误
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throw new ScrapeError(errMsg || '爬取过程中发生未知错误', 500, 'UNKNOWN_ERROR');
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} finally {
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console.log(chalk.gray('🧹 清理资源...'));
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try { await page.close({ runBeforeUnload: true }); } catch {}
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// 仅释放共享上下文的引用，不直接关闭窗口
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await releaseBrowserContext();
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await prisma.$disconnect();
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console.log(chalk.gray('✓ 资源清理完成'));
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}
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}
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