部署时HTML Agility Pack SocketException

Question

我不确定这是否与HTML Agility有关，但这是我的问题。

我正在使用如下所示的HTML Agility Pack解析HTML文档：

var web = new HtmlWeb();
var doc = web.Load(url);
...
Parsing Logic

当我在本地运行它时，它工作得很好，但是，当我部署应用程序时，出现以下错误：（我正在使用Ionos 1＆1进行托管）

SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.

System.Net.Http.ConnectHelper.ConnectAsync（字符串主机，整数端口，CancellationToken cancelledToken）

和

HttpRequestException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
System.Net.Http.ConnectHelper.ConnectAsync(string host, int port, CancellationToken cancellationToken)
System.Threading.Tasks.ValueTask<TResult>.get_Result()
System.Runtime.CompilerServices.ConfiguredValueTaskAwaitable<TResult>+ConfiguredValueTaskAwaiter.GetResult()
System.Net.Http.HttpConnectionPool.ConnectAsync(HttpRequestMessage request, bool allowHttp2, CancellationToken cancellationToken)
System.Threading.Tasks.ValueTask<TResult>.get_Result()
System.Runtime.CompilerServices.ConfiguredValueTaskAwaitable<TResult>+ConfiguredValueTaskAwaiter.GetResult()
System.Net.Http.HttpConnectionPool.CreateHttp11ConnectionAsync(HttpRequestMessage request, CancellationToken cancellationToken)
System.Threading.Tasks.ValueTask<TResult>.get_Result()
System.Runtime.CompilerServices.ConfiguredValueTaskAwaitable<TResult>+ConfiguredValueTaskAwaiter.GetResult()
System.Net.Http.HttpConnectionPool.GetHttpConnectionAsync(HttpRequestMessage request, CancellationToken cancellationToken)
System.Threading.Tasks.ValueTask<TResult>.get_Result()
System.Runtime.CompilerServices.ConfiguredValueTaskAwaitable<TResult>+ConfiguredValueTaskAwaiter.GetResult()
System.Net.Http.HttpConnectionPool.SendWithRetryAsync(HttpRequestMessage request, bool doRequestAuth, CancellationToken cancellationToken)
System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
System.Net.Http.DiagnosticsHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
System.Net.Http.HttpClient.FinishSendAsyncUnbuffered(Task<HttpResponseMessage> sendTask, HttpRequestMessage request, CancellationTokenSource cts, bool disposeCts)
System.Net.HttpWebRequest.SendRequest()
System.Net.HttpWebRequest.GetResponse()

和

System.Net.Sockets.SocketException (10060): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
   at System.Net.Http.ConnectHelper.ConnectAsync(String host, Int32 port, CancellationToken cancellationToken)

也可能出于安全原因，从Ionos 1＆1阻止了来自Web应用程序的传出呼叫？

我可以从任何浏览器访问链接都很好

Answer 1

我设法解决了这个问题。令人怀疑的是（由于代码在本地运行良好），HTML Agility Pack没有错。问题是我的Web应用程序的拨出电话被托管服务提供商阻止。

要解决该问题，我必须使用代理进行呼叫。代理详细信息（地址和端口）通常由主机提供。

希望这对以后的人有所帮助。