├── .gitignore
├── readme.md
├── tool.js
├── package.json
├── index.js
└── core.js


/.gitignore:
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 1 | .DS_Store
 2 | .idea
 3 | .vscode
 4 | .eslintcache
 5 | dist
 6 | logs
 7 | var
 8 | node_modules/
 9 | npm-debug.log*
10 | config.json
11 | package-lock.json
12 | .csscomb.json
13 | .cache-loader
14 | 


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/readme.md:
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 1 | # dy 去水印 node.js(仅供学习使用)
 2 | 
 3 | ### 浏览器访问模式
 4 | ```bash
 5 | npm start
 6 | ```
 7 | 
 8 | 然后打开 http://localhost:3000/dy?url=输入从抖音复制的url地址
 9 | 
10 | ### 工具模式
11 | 
12 | ```bash
13 | node tool.js //会把无水印视频下载到本地
14 | ```
15 | ### 原理说明
16 | [文章详解](https://juejin.im/post/5ee4f035e51d4578615af59f)
17 | 
18 | 
19 | 


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/tool.js:
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 1 | const { runDouyin } = require('./core');
 2 | const fs = require('fs');
 3 | 
 4 | async function tool() {
 5 |   const { videoStream, share_title } = await runDouyin(
 6 |     'https://v.douyin.com/JdngHhh/'
 7 |   );
 8 |   videoStream.pipe(fs.createWriteStream(`${share_title}(无水印).mp4`)); // 下载到本地
 9 | }
10 | 
11 | tool();
12 | 


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/package.json:
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 1 | {
 2 |   "name": "douyin",
 3 |   "version": "1.0.0",
 4 |   "description": "",
 5 |   "main": "index.js",
 6 |   "scripts": {
 7 |     "start": "node index.js"
 8 |   },
 9 |   "keywords": [],
10 |   "author": "Faithree",
11 |   "license": "ISC",
12 |   "dependencies": {
13 |     "axios": "^0.19.2",
14 |     "express": "^4.17.1"
15 |   }
16 | }
17 | 


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/index.js:
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 1 | const express = require('express');
 2 | const { runDouyin } = require('./core');
 3 | // const fs = require('fs');
 4 | const app = express();
 5 | const port = 3000;
 6 | app.get('/dy', async (req, res) => {
 7 |   if (req.query.url) {
 8 |     try {
 9 |       const { videoStream, share_title } = await runDouyin(req.query.url);
10 |       res.attachment(`${share_title}(无水印).mp4`);
11 |       videoStream.pipe(res);
12 |     } catch (e) {
13 |       console.log(e);
14 |       res.send('错误: ' + e);
15 |     }
16 |   } else {
17 |     res.send('url错误');
18 |   }
19 | });
20 | 
21 | app.listen(port, () => console.log(`Example app listening on port ${port}!`));
22 | 


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/core.js:
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 1 | // import axios from 'axios';
 2 | const axios = require('axios');
 3 | const userAgent =
 4 |   'Mozilla/5.0 (Linux; Android 8.0; Pixel 2 Build/OPD3.170816.012) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Mobile Safari/537.36';
 5 | async function request(url, type) {
 6 |   const option = {
 7 |     url,
 8 |     method: 'get',
 9 |     headers: {
10 |       'user-agent': userAgent,
11 |     },
12 |   };
13 |   if (type) {
14 |     option.responseType = type;
15 |   }
16 |   return axios(option);
17 | }
18 | 
19 | async function runDouyin(shareUrl) {
20 |   // 1.根据分享的视频地址，通过重定向获取整个html信息
21 |   const { data: html } = await request(shareUrl);
22 |   // 2.截取itemId， dytk 发起二次请求获取uriId
23 |   const itemId = html.match(/(?<=itemId:\s\")\d+(?=\")/g)[0];
24 |   const dytk = html.match(/(?<=dytk:\s\")(.*?)(?=\")/g)[0];
25 |   const long_url = `https://www.iesdouyin.com/web/api/v2/aweme/iteminfo/?item_ids=${itemId}&dytk=${dytk}`;
26 |   const { data: videoJson } = await request(long_url);
27 |   // 3.最后通过uri参数来调用视频下载接口
28 |   const uriId = videoJson.item_list[0].video.play_addr.uri;
29 |   const share_title = videoJson.item_list[0].share_info.share_title;
30 |   const noWatermarkUrl = `https://aweme.snssdk.com/aweme/v1/play/?video_id=${uriId}&line=0&ratio=540p&media_type=4&vr_type=0&improve_bitrate=0&is_play_url=1&is_support_h265=0&source=PackSourceEnum_PUBLISH`;
31 |   const { data: videoStream } = await request(noWatermarkUrl, 'stream');
32 |   return { videoStream, share_title };
33 | }
34 | 
35 | module.exports = {
36 |   runDouyin,
37 | };
38 | 


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