抖音无水印视频解析原理及代码实现（C#）Windows软件

网页分析过程

看过部分教程分析是通过APP抓包，所需数据较为麻烦，其实网页访问抖音也有无水印的地址返回。浏览器使用在F12访问抖音分享的链接，使用手机模式，链接首先会被重定向到iesdouyin.com，请求的JSON数据中，如图的两条链接为无水印的视频地址。

代码实现解析

Java语言版本我已经实现，通过上面分析可以知道在客户端能够完成视频解析，搞一个Windows的客户端，决定用C#写个控制台程序

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Linq;
using System.Net;
using System.Text.RegularExpressions;

namespace douyindlcli
{
    class Program
    {

        static string fileName = "";
        static void Main(string[] args)
        {
            Console.WriteLine("抖音无水印视频下载客户端，视频文件与软件在同一目录。查看更新https://ishare20.net/archives/131.html");
           string text="";
           while (text != "exit")
            {

                Console.WriteLine("请复制粘贴文本，自动解析：");
                text = Console.ReadLine();
                //Console.WriteLine(text);
                string p = "https://v.douyin.com/\\S*";
                if (Regex.IsMatch(text, p))
                {
                    download(Regex.Match(text, p).Value);
                    Console.WriteLine(); 
                    Console.WriteLine();
                }
                else
                {
                    Console.WriteLine("输入有误，请重新输入");
                    Console.WriteLine();
                }
            }
            
        }
        static void download(string url)
        {
            HttpWebRequest request =
                                    (HttpWebRequest)WebRequest.Create(url);
            request.UserAgent = "Mozilla/5.0 (Linux; Android 8.0; Pixel 2 Build/OPD3.170816.012) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Mobile Safari/537.36";
            CookieContainer cookieContainer = new CookieContainer();

            // Get the response.
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            // Display the status.
            Console.WriteLine(response.Headers.Get("Location"));
            // Get the stream containing content returned by the server.
            Stream dataStream = response.GetResponseStream();
            // Open the stream using a StreamReader for easy access.
            StreamReader reader = new StreamReader(dataStream);
            // Read the content.
            string responseFromServer = reader.ReadToEnd();
            // Display the content.
            //string cc = response.GetResponseHeader("set-cookie");
            //Console.WriteLine(cc);

            //Console.WriteLine(cookieContainer.GetCookies(new Uri("https://www.iesdouyin.com")).ToString());

            string p = "itemId: \"\\d*";
            string itemIds = Regex.Match(responseFromServer, p, RegexOptions.None).Value.Replace("itemId: \"", "");

            p = "dytk: \"\\w*";
            string dytk = Regex.Match(responseFromServer, p, RegexOptions.None).Value.Replace("dytk: \"", "");

           // Console.WriteLine(itemIds);
           // Console.WriteLine(dytk);

            request =
                     (HttpWebRequest)WebRequest.Create("https://www.iesdouyin.com/web/api/v2/aweme/iteminfo/?item_ids=" + itemIds + "&dytk=" + dytk);


            HttpWebResponse response2 = (HttpWebResponse)request.GetResponse();
            string res2 = new StreamReader(response2.GetResponseStream()).ReadToEnd();

            //Console.WriteLine(res2);
            p = "url_list\":\\[\"https://aweme.snssdk.com/aweme/v1/play/\\?video_id.*?PackSourceEnum_PUBLISH";


            MatchCollection matches = Regex.Matches(res2, p);

            /* for (int ctr = 0; ctr < matches.Count; ctr++)
             {
                 Console.WriteLine(ctr+" url is "+matches[ctr].Value);
             }*/

            string videoUrl = matches[1].Value.Replace("url_list\":[\"", "");
            //Console.WriteLine(videoUrl);

            WebClient webClient = new WebClient();
            webClient.Headers.Add("user-agent", "Mozilla/5.0 (Linux; Android 8.0; Pixel 2 Build/OPD3.170816.012) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Mobile Safari/537.36");
            Console.WriteLine("正在下载......");
            fileName = DateTime.Now.ToString("yyyyMMddHHmmss") + ".mp4";

            webClient.DownloadFile(new Uri(videoUrl), fileName);
            Console.WriteLine("下载完成，文件名：" + fileName);

            //webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(DownloadProgressCallback);

            // Cleanup the streams and the response.
            reader.Close();
            dataStream.Close();
            response.Close();
            response2.Close();
        }
    }
   
}

下载地址

https://tc5.us/file/4188770-413823330