347 lines
15 KiB
TypeScript
347 lines
15 KiB
TypeScript
export const runtime = 'nodejs'
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// src/scrapeDouyin.ts
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import { BrowserContext, Page, type Response } from 'playwright';
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import { chromium } from 'playwright-extra';
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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, collectResponsesWithinTime } 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 { acquireIsolatedContext, releaseIsolatedContext } 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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/**
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* 滚动页面并收集评论
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* @param context 浏览器上下文
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* @param page 页面对象
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* @param durationMs 持续时间（毫秒）
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* @returns 收集到的所有评论响应
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*/
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async function scrollAndCollectComments(
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context: BrowserContext,
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page: Page,
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durationMs: number = 10_000
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): Promise<Response[]> {
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console.log(chalk.blue(`📜 开始滚动页面收集评论（持续 ${durationMs / 1000} 秒）...`));
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// 启动评论响应收集器
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const commentResponsesPromise = collectResponsesWithinTime(
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context,
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(r: Response) => r.url().includes(COMMENT_PATH) && r.status() === 200 && r.request().frame()?.page() === page,
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durationMs
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);
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// 在指定时间内持续滚动页面
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const startTime = Date.now();
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const scrollInterval = 500;
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let scrollCount = 0;
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const selector = "div[data-e2e='comment-list']";
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// 1) 等元素出现并可见
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await page.waitForSelector(selector, { state: 'visible', timeout: 5000 });
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// 2) 确保滚动到可见区域
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const list = page.locator(selector);
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await list.scrollIntoViewIfNeeded();
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// 3) 执行 hover（推荐用 locator 的 hover）
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list.hover({ timeout: 5000 }).catch(() => { });
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while (Date.now() - startTime < durationMs - 500) { // 留 500ms 缓冲
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try {
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list.hover({ timeout: 2000 }).catch(() => { });
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// 使用 Playwright 的 mouse.wheel 方法滚动
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// 每次滚动一大段距离
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// await list.hover();
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const scrollAmount = 1500;
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await page.mouse.wheel(0, scrollAmount);
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scrollCount++;
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console.log(chalk.gray(` ↓ 第 ${scrollCount} 次滚动`));
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// 等待一段时间，让评论加载
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await page.waitForTimeout(scrollInterval);
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} catch (e) {
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console.warn(chalk.yellow(` ⚠ 滚动时出现警告: ${(e as Error)?.message}`));
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}
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}
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// 等待收集器完成
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const commentResponses = await commentResponsesPromise;
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console.log(chalk.green(`✓ 评论收集完成，共收集到 ${commentResponses.length} 个评论响应`));
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return commentResponses;
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}
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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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// await new Promise((res) => setTimeout(res, 1000000));
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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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// @ts-ignore
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aweme_mem.statistics = aweme_mem.stats
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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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let context: BrowserContext | null = await acquireIsolatedContext();
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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 && r.request().frame()?.page() === page },
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{ key: 'post', test: (r: Response) => r.url().includes(POST_PATH) && r.status() === 200 && r.request().frame()?.page() === page },
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], 10_000);
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await page.goto(url, { waitUntil: 'domcontentloaded', timeout: 20_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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// 等待作品类型判定
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const firstType = await firstTypePromise;
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// 尝试从内存读取图文数据（如果是图文作品）
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let memoryData: { aweme: any; comments: DouyinCommentResponse | null } | null = null;
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try {
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memoryData = 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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} catch {
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// 内存读取失败，稍后通过网络获取
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}
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if (!firstType && !memoryData) {
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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' || memoryData ? '图文' : '视频')}`));
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let allComments: DouyinComment[] = [];
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try {
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// 开始滚动并收集评论
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const commentResponses = await scrollAndCollectComments(context, page);
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// 解析所有收集到的评论响应
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for (const commentRes of commentResponses) {
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try {
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const commentData = await safeJson<DouyinCommentResponse>(commentRes);
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if (commentData?.comments?.length) {
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allComments.push(...commentData.comments);
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}
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} catch (e) {
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console.warn(chalk.yellow(`⚠ 解析评论响应失败: ${(e as Error)?.message}`));
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}
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}
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} catch (error) {
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console.warn(chalk.yellow(`⚠ 评论收集失败: ${(error as Error)?.message}`));
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}
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// 去重评论（根据 cid）
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const uniqueComments = Array.from(
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new Map(allComments.map(c => [c.cid, c])).values()
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);
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console.log(chalk.green(`✓ 共收集到 ${uniqueComments.length} 条独立评论（去重前: ${allComments.length}）`));
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// 如果从内存读取到了评论，合并进来作为兜底
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let comments: DouyinCommentResponse;
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if (memoryData?.comments?.comments?.length) {
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console.log(chalk.blue(`📝 合并内存中的 ${memoryData.comments.comments.length} 条评论`));
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const memComments = memoryData.comments.comments;
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const mergedMap = new Map(uniqueComments.map(c => [c.cid, c]));
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for (const c of memComments) {
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if (!mergedMap.has(c.cid)) {
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mergedMap.set(c.cid, c);
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}
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}
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comments = {
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comments: Array.from(mergedMap.values()),
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total: mergedMap.size,
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status_code: 0
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};
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console.log(chalk.green(`✓ 合并后共 ${comments.comments.length} 条评论`));
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} else {
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comments = {
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comments: uniqueComments,
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total: uniqueComments.length,
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status_code: 0
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};
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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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// 优先处理内存数据（图文）
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if (memoryData) {
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const aweme = memoryData.aweme;
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const uploads = await handleImagePost(context, aweme);
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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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} else if (firstType?.key === 'post') {
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// 图文作品（网络）
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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: ${errMsg}`));
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// 根据错误类型返回不同的状态码
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if (errMsg.includes('timeout') || errMsg.includes('超时')) {
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throw new ScrapeError('请求超时,请稍后重试', 408, 'TIMEOUT');
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}
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if (errMsg.includes('页面内存数据中未找到作品详情')) {
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throw new ScrapeError('作品数据加载失败', 404, 'DATA_NOT_LOADED');
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}
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if (errMsg.includes('net::')) {
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throw new ScrapeError('网络连接失败', 503, 'NETWORK_ERROR');
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}
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// 默认服务器错误
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throw new ScrapeError(errMsg || '爬取过程中发生未知错误', 500, 'UNKNOWN_ERROR');
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} finally {
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console.log(chalk.gray('🧹 清理资源...'));
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try { await page.close({ runBeforeUnload: true }); } catch { }
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// 关闭本次任务的隔离上下文与浏览器
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await releaseIsolatedContext(context);
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await prisma.$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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