C#抖音地址解析获取水印地址

 /// <summary>
        /// 抖音
        /// </summary>
        /// <param name="url"></param>
        /// <returns></returns>
        public string DouYin(string url)
        {
            var webHtml = VideoHelper.GetWebContent(url, 0);
            var webArr1 = Regex.Split(webHtml, "playAddr: \"", RegexOptions.IgnoreCase);
            var webArr2 = Regex.Split(webArr1[1], "\",", RegexOptions.IgnoreCase);
            var playAddr = webArr2[0].Replace("playwm", "play");
            var payUrl = VideoHelper.GetMapUrl(playAddr, 1);
            return payUrl;
        }

/// <summary>
        /// 获取页面html
        /// </summary>
        /// <param name="Url">页面路径</param>
        /// <param name="type">浏览器类型（0PC/1手机）</param>
        /// <returns></returns>
        public static string GetWebContent(string Url, int type = 0)
        {
            string strResult = "";
            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
                //声明一个HttpWebRequest请求 
                request.Method = "POST";
                var UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.861.0 Safari/535.2";
                if (type > 0)
                {//模拟手机浏览器
                    UserAgent = "Mozilla/5.0 (Linux; U; Android 2.2; en-us; Nexus One Build/FRF91) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1";
                }
                request.UserAgent = UserAgent;

                request.ContentType = "application/x-www-form-urlencoded";
                request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding("utf-8"));
                strResult = sr.ReadToEnd();
                response.Close();
            }
            catch
            {
                Console.WriteLine("出错");
            }
            return strResult;
        }


        /// <summary>
        /// 获取重定向地址
        /// </summary>
        /// <param name="Url">原地址</param>
        /// <param name="type">浏览器类型（0PC/1手机）</param>
        /// <returns></returns>
        public static string GetMapUrl(string Url, int type = 0)
        {
            string strResult = "";
            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
                request.Method = "POST";
                var UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.861.0 Safari/535.2";
                if (type > 0)
                {//模拟手机浏览器
                    UserAgent = "Mozilla/5.0 (Linux; U; Android 2.2; en-us; Nexus One Build/FRF91) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1";
                }
                request.UserAgent = UserAgent;
                request.ContentType = "application/x-www-form-urlencoded";
                request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
                using (WebResponse response = request.GetResponse())
                {
                    strResult = response.Headers["Location"];      //重定向地址
                }


            }
            catch
            {
                Console.WriteLine("出错");
            }
            return strResult;
        }