Question

我有一个带有ASP.NET REST API应用程序的Azure Web应用程序，可以充当Bot Channels Registration的服务。

在此应用中，我有一个端点

 public async Task<IHttpActionResult> Post(string userToken, string botName, [FromBody] Activity activity)

我从用户那里收到一条消息，对其进行处理并发回。

当我尝试与用户交流时（通过键入活动或实际答案）

private static async Task ShowTyping(Activity activity, ConnectorClient client)
{
    var typingResponse = new Activity
    {
        Conversation = activity.Conversation,
        From = activity.Recipient,
        Locale = activity.Locale,
        Recipient = activity.From,
        ReplyToId = activity.Id,
        Id = activity.Id,
        Type = "typing"
    };
    await client.Conversations.UpdateActivityAsync(typingResponse);
}

...

foreach (var reply in replies)
{
      Trace.TraceInformation($"[{userToken}:{botName}] Sending reply {reply.Id}:{reply.Text}");
      await client.Conversations.ReplyToActivityAsync(reply);
}

通过REST API我收到HttpRequestException - An existing connection was forcibly closed by the remote host：

2019-01-22T15:49:54  PID[17864] Error       System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a send. ---> System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host    at System.Net.Sockets.Socket.EndReceive(IAsyncResult asyncResult)    at System.Net.Sockets.NetworkStream.EndRead(IAsyncResult asyncResult)   
--- End of inner exception stack trace ---    at System.Net.TlsStream.EndWrite(IAsyncResult asyncResult)    at System.Net.PooledStream.EndWrite(IAsyncResult asyncResult)    at System.Net.ConnectStream.WriteHeadersCallback(IAsyncResult ar)    --- End of inner exception stack trace ---    at System.Net.HttpWebRequest.EndGetRequestStream(IAsyncResult asyncResult, TransportContext& context)    at System.Net.Http.HttpClientHandler.GetRequestStreamCallback(IAsyncResult ar)    --- End of inner exception stack trace ---    at Microsoft.Rest.RetryDelegatingHandler.<SendAsync>d__15.MoveNext()
--- End of stack trace from previous location where exception was thrown ---    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)    at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)    at Microsoft.Bot.Connector.Conversations.<UpdateActivityWithHttpMessagesAsync>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)    at Microsoft.Bot.Connector.ConversationsExtensions.<UpdateActivityAsync>d__16.MoveNext()
--- End of stack trace from previous location where exception was thrown ---    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)    at ChatFirst.Channels.BotFramework.Controllers.WebhookController.<ShowTyping>d__5.MoveNext()

一切在模拟器上都可以正常运行，并且在Web服务中根本不起作用。我尝试自己实现REST API客户端，但结果相同。

我想念什么？

有关此问题的更多信息

我使用v4.2 Bot Framework软件包

<package id="Microsoft.Bot.Builder" version="4.2.0" targetFramework="net472" /> <package id="Microsoft.Bot.Connector" version="4.2.0" targetFramework="net472" /> <package id="Microsoft.Bot.Schema" version="4.2.0" targetFramework="net472" />

整个帖子方法，userToken和botName是我的内部凭据

/// <summary>
///     POST: api/v1/webhook/{userToken}/{botName}
///     Receive a message from a user and reply to it
/// </summary>
[HttpPost]
[Route("api/v1/webhook/{userToken}/{botName}")]
public async Task<IHttpActionResult> Post(string userToken, string botName, [FromBody] Activity activity)
{
    try
    {
        if (activity.Type == ActivityTypes.Message)
        {
            Trace.TraceInformation($"[{userToken}:{botName}] Message from {activity.From.Id}");
            MicrosoftAppCredentials credentials = _channelGateway.GetCredentials(userToken, botName);

            if (credentials == null)
                return Ok();

            var serviceUri = new Uri(activity.ServiceUrl);
            var client = new ConnectorClient(serviceUri, credentials);

            await ShowTyping(activity, client);

            IEnumerable<Activity> replies = await _coreTalkService.GetRepliesAsync(new BotToken(userToken, botName), activity);

            foreach (var reply in replies)
            {
                Trace.TraceInformation($"[{userToken}:{botName}] Sending reply {reply.Id}:{reply.Text}");
                await client.Conversations.ReplyToActivityAsync(reply);
            }
        }
        else
        {
            HandleSystemMessage(activity);
        }

        return Ok();
    }
    catch (Exception e)
    {
        Trace.TraceError(e.ToString());
        return InternalServerError(e);
    }
}

Bot Channels Registrations设置如下所示
如果我通过ngrok将Bot Channel重新路由到我的开发PC上的本地实例，则会收到相同的错误。
我简化了执行简单回显答案的整个方法，但错误仍然存在

public async Task<IHttpActionResult> Post(string userToken, string botName, [FromBody] Activity activity)
{
    Trace.TraceInformation($"[{userToken}:{botName}] Message from {activity.From.Id}");
    var client = new ConnectorClient(new Uri(activity.ServiceUrl), 
        new MicrosoftAppCredentials("<secret>", "<secret>"));
    var answer = activity.CreateReply(activity.Text, activity.Locale);
    await client.Conversations.ReplyToActivityAsync(answer);
    return Ok();
}

activity.ServiceUrl是https://webchat.botframework.com/
如果通过网络聊天发送的消息发生错误，我没有检查其他渠道

Answer 1

我唯一想到的就是必须有一些引用的库干扰您项目中的传出消息。

我没有尝试调试您的项目，而是创建了一个新的类似项目，该项目可以按预期工作：https://github.com/xakpc/BotFrameworkChannel.Test/pull/1

Answer 2

您是否将TLS 1.2用作安全协议？

查看此答案：https://stackoverflow.com/a/53647879/3673445

“在2018年12月4日，Azure Bot服务将要求使用传输层安全性（TLS）1.2保护所有连接。此强制实施对于为您的数据提供最佳安全性至关重要。”

Bot Channels注册SocketException-现有连接被远程主机强行关闭

2 个答案: