在 BotFramework 上从 bot 向用户发送消息

Question

我有一个基于 BotFramework 3.5 构建并作为 WebApp 托管在 Azure 上的机器人。在实现机器人需要响应用户输入的场景时，我没有遇到任何问题。然而，有必要教他按某个时间表开始对话。 为了达到这个目标，我创建了一个 WebJob，它基本上是一个简单的控制台应用程序。这是用于从机器人向用户发起消息的代码：

            var botAccount = new ChannelAccount(id: from);
            var userAccount = new ChannelAccount(id: to);
            var conversation = new ConversationAccount(false, conversationId);

            var connector = new ConnectorClient(serviceUrl);

            IMessageActivity message = Activity.CreateMessageActivity();
            message.From = botAccount;
            message.Recipient = userAccount;
            message.Conversation = conversation;
            message.Text = text;
            message.Locale = locale;
            await connector.Conversations.SendToConversationAsync((Activity)message);

from, to, serviceUrl, conversationId - 取自之前的对话，所以我希望它们是有效的。但是在SendToConversationAsync 上抛出异常：

System.UnauthorizedAccessException: Authorization for Microsoft App ID 3a26a4d4-f75a-4feb-b3e0-37a7fa24e5fc failed with status code Unauthorized and reason phrase 'Unauthorized' ---> System.Net.Http.HttpRequestException: Response status code does not indicate success: 401 (Unauthorized)

app.config 文件包含与原始机器人 API 相同的值，包括 AppId 和 AppSecret。我看到了一些关于同一主题的问题，但没有找到答案。

我错过了什么吗？从控制台应用程序代表机器人发送消息是一种有效的方法吗？

Answer 1

根据您的描述，我按照此tutorial 开始使用连接器，并按照此tutorial 发送和接收活动。

根据你的代码，我创建了我的控制台应用程序，我可以重现同样的问题，然后我找到了一个关于类似问题的 git issue。经过一些试验，我可以让它按我的预期工作，你可以参考它：

MicrosoftAppCredentials.TrustServiceUrl("{ServiceUrl}", DateTime.Now.AddDays(7));
var account=new MicrosoftAppCredentials("MicrosoftAppIdKey", "MicrosoftAppPasswordKey");
var connector = new ConnectorClient(new Uri("{ServiceUrl}"),account);

或

实现你的 DelegatingHandler

public class MyDelegatingHandler : DelegatingHandler
{
    private string _token;
    public MyDelegatingHandler(string token)
    {
        _token = token;
    }

    protected override Task<HttpResponseMessage> SendAsync(
    HttpRequestMessage request, CancellationToken cancellationToken)
    {
        request.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", _token);
        return base.SendAsync(request, cancellationToken);
    }
}

然后，您需要按如下方式构建您的ConnectorClient：

var account=new MicrosoftAppCredentials("{MicrosoftAppIdKey}", "{MicrosoftAppPasswordKey}");
var jwtToken=await account.GetTokenAsync();
var connector = new ConnectorClient(new Uri("{serviceUrl}"),handlers:new MyDelegatingHandler(jwtToken));

这是我的控制台应用代码sn-p，你可以参考一下：

try
{
    var userAccount = new ChannelAccount() { Id = "default-user", Name = "user" };
    var botAccount = new ChannelAccount() { Id = "934493jn5f6f348f", Name = "console-Bot" };
    string url = "{serviceUrl}";

    MicrosoftAppCredentials.TrustServiceUrl(url, DateTime.Now.AddDays(7));
    var account = new MicrosoftAppCredentials("{MicrosoftAppIdKey}", "{MicrosoftAppPasswordKey}");
    var connector = new ConnectorClient(new Uri(url), account);

    IMessageActivity message = Activity.CreateMessageActivity();
    message.From = botAccount;
    message.Recipient = userAccount;
    message.Conversation = new ConversationAccount() { Id = "{conversationId}" };
    message.Text = "Message sent from console application!!!";
    message.Locale = "en-us";
    var response = await connector.Conversations.SendToConversationAsync((Activity)message);
    Console.WriteLine($"response:{response.Id}");
}
catch (Exception e)
{
    Console.WriteLine($"exception:{e.Message}\r\n{e.StackTrace}");
}

结果

Answer 2

尝试像这样创建一个新对话：

var conversationId = await connector.Conversations.CreateDirectConversationAsync(botAccount, userAccount);