我做了一批解析 gearbest.com 的 html 頁面以提取項目數(shù)據(jù)（示例鏈接link）。直到 2-3 周前網(wǎng)站更新后，它才有效。所以我無法下載要解析的頁面，我也不知道為什么。在更新之前，我確實使用 HtmlAgilityPack 請求了以下代碼。HtmlWeb web = new HtmlWeb();    HtmlDocument doc = null;    doc = web.Load(url); //now this the point where is throw the exception我在沒有框架的情況下嘗試過，并在請求中添加了一些日期HttpWebRequest request = (HttpWebRequest) WebRequest.Create("https://it.gearbest.com/tv-box/pp_009940949913.html");request.Credentials = CredentialCache.DefaultCredentials;request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36";request.ContentType = "text/html; charset=UTF-8";request.CookieContainer = new CookieContainer();request.Headers.Add("accept-language", "it-IT,it;q=0.9,en-US;q=0.8,en;q=0.7");request.Headers.Add("accept-encoding", "gzip, deflate, br");request.Headers.Add("upgrade-insecure-requests", "1");request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8";request.CookieContainer = new CookieContainer();Response response = request.GetResponse();  //exception例外是：IOException：無法從傳輸連接讀取數(shù)據(jù)SocketException: 無法建立連接。如果我嘗試請求主頁 ( https://it.gearbest.com ) 它可以工作。你認為問題是什么？