如何在尝试使用 BotFramework 显示聊天记录时修复错误请求？

Question

我正在尝试显示用户与我的机器人的聊天历史记录，以便当他们回来时可以看到他们之前的对话。当我尝试“SendConversationHistory(conversationId, transcripts)”功能时，我不断收到 Bad Request (400) 并且聊天机器人中不显示历史记录。有人知道如何解决这个问题吗？

我在 C# 中使用 BotFramework SDK v.3。

我所做的是： 1. 检查是否存储了任何对话 ID，以便能够使用该对话 ID 重新连接 2.我向机器人发送一个事件来恢复历史 3. 我能够获取以前的活动并创建成绩单

设置我的成绩单后，我尝试了这个不起作用的 SendConversationHistory 函数。

即使使用旧对话 ID 失败，我也可以与机器人聊天。我还尝试让机器人做一个回复活动，这很有效。

我关注了a js sample (v4)、this stackoverflow question 和this thread about history in github，但这些都没有帮助解决这个问题。

MessageController.cs（在 HandleSystemMessage 中）

else if (message.Name.Equals("restoreHistory"))
{
    string convId = message.Conversation.Id;
    List<Activity> activities = JsonConvert.DeserializeObject<List<Activity>>((string)message.Value);
    var incrementId = 0;

    if (message.Id.Contains("|"))
        int.TryParse(message.Id.Split('|')[1], out incrementId);

    foreach(var a in activities)
    {
        incrementId++;
        a.Id = string.Concat(convId, "|", incrementId.ToString().PadLeft(7, '0'));
        a.ChannelData = string.Empty;
    }

    if (activities != null && activities.Count > 0)
    {
        var connector = new ConnectorClient(new System.Uri(message.ServiceUrl));
        var transcripts = new Transcript(activities);
        connector.Conversations.SendConversationHistory(convId, transcripts);
    }
}

default.htm

var botConnection = new BotChat.DirectLine({
    secret: ...,
    conversationId: getPersistedConversationId(),
    token: params['t'],
    domain: params['domain'],
    webSocket: params['webSocket'] && params['webSocket'] === "true"
});
BotChat.App({
    botConnection: botConnection,
    user: { id: ... },
    bot: { id: ... },
    speechOptions: speechOptions
}, document.getElementById("BotChatGoesHere"));

botConnection.connectionStatus$
    .subscribe(function (connectionStatus) {
        switch (connectionStatus) {
            case 2:
                if (botConnection.conversationId === localStorage.getItem('conversationId')) {
                    botConnection.postActivity({
                        from: user,
                        type: 'event',
                        name: 'restoreHistory',
                        text: '',
                        value: localStorage.getItem('conversations')
                    }).subscribe(function (activityId) {
                        console.log('sending chat history.');
                    });
                } else {
                    saveConversationId(botConnection.conversationId);
                }
        }
    });

function saveConversationId(conversationId) {
    localStorage.setItem('conversationId', conversationId);
}
function getPersistedConversationId() {
    return localStorage.getItem('conversationId');
}

我得到的错误是那些：

Exception thrown: 'Microsoft.Rest.TransientFaultHandling.HttpRequestWithStatusException' in Microsoft.Rest.ClientRuntime.dll
Response status code indicates server error: 400 (BadRequest).

---

活动的 Json

[  
    {  
        "type":"message",
        "id":"6Tklwkie30H7oCI1eyWx9i-h|0000001",
        "timestamp":"2019-06-19T10:37:40.1175096Z",
        "channelId":"directline",
        "from":{  
            "id":"MyBotName",
            "name":"MyBotName"
        },
        "conversation":{  
            "id":"6Tklwkie30H7oCI1eyWx9i-h"
        },
        "text":"Hello, I'm MyBotName. How can I help you? To get started ask me a question.",
        "attachments":[  

        ],
        "entities":[  

        ],
        "replyToId":"7E6AtBm9iXL"
    },
    {  
        "type":"message",
        "id":"6Tklwkie30H7oCI1eyWx9i-h|0000003",
        "timestamp":"2019-06-19T10:37:43.4034223Z",
        "localTimestamp":"2019-06-19T10:37:43.2484146+00:00",
        "channelId":"directline",
        "from":{  
            "id":"MyBotName",
            "name":"MyBotName"
        },
        "conversation":{  
            "id":"6Tklwkie30H7oCI1eyWx9i-h"
        },
        "attachmentLayout":"carousel",
        "locale":"en-US",
        "text":"",
        "attachments":[  
            {  
                "contentType":"application/vnd.microsoft.card.hero",
                "content":{  
                    "title":"Title1",
                    "subtitle":"",
                    "text":"",
                    "images":[  
                        {  
                            "url":"http://..."
                        }
                    ],
                    "buttons":[  
                        {  
                            "type":"openUrl",
                            "title":"Button1",
                            "value":"https://..."
                        },
                        {  
                            "type":"openUrl",
                            "title":"Button2",
                            "value":"https://..."
                        }
                    ]
                }
            },
            {  
                "contentType":"application/vnd.microsoft.card.hero",
                "content":{  
                    "title":"Title2",
                    "subtitle":"",
                    "text":"",
                    "images":[  
                        {  
                            "url":"http://..."
                        }
                    ],
                    "buttons":[  
                        {  
                            "type":"openUrl",
                            "title":"Button1",
                            "value":"https://..."
                        },
                        {  
                            "type":"openUrl",
                            "title":"Button2",
                            "value":"https://..."
                        }
                    ]
                }
            },
            {  
                "contentType":"application/vnd.microsoft.card.hero",
                "content":{  
                    "title":"Title3",
                    "subtitle":"",
                    "text":"",
                    "images":[  
                        {  
                            "url":"http://..."
                        }
                    ],
                    "buttons":[  
                        {  
                            "type":"openUrl",
                            "title":"Button1",
                            "value":"https://..."
                        },
                        {  
                            "type":"openUrl",
                            "title":"Button2",
                            "value":"https://..."
                        }
                    ]
                }
            }
        ],
        "entities":[  

        ],
        "replyToId":"6Tklwkie30H7oCI1eyWx9i-h|0000000"
    },
    {  
        "type":"message",
        "id":"6Tklwkie30H7oCI1eyWx9i-h|0000000",
        "timestamp":"2019-06-19T10:37:33.8526334Z",
        "serviceUrl":"https://directline.botframework.com/",
        "channelId":"directline",
        "from":{  
            "id":"anonymous",
            "name":"Anonymous"
        },
        "conversation":{  
            "id":"6Tklwkie30H7oCI1eyWx9i-h"
        },
        "recipient":{  
            "id":"MyBotName@WI6mwV4z0jY",
            "name":"MyBotName"
        },
        "textFormat":"plain",
        "locale":"en-US",
        "text":"i'm looking for this",
        "entities":[  
            {  
                "type":"ClientCapabilities",
                "requiresBotState":true,
                "supportsTts":true,
                "supportsListening":true
            }
        ],
        "channelData":{  
            "clientActivityId":"1560940638882.6146258363791712.0"
        }
    }
]

Answer 1

如果你在 Visual Studio 中调试，可以点击“查看详细信息”查看整个异常对象。

对于ErrorResponseException，您可以看到在 HTTP 响应中返回的实际错误消息。在这种情况下，它会显示“无效活动”，这表明您尝试发送的活动有问题。

事实证明，您没有指定活动的接收者。如果您指定收件人，那么您应该通过“BadRequest”异常。

然而：您可能会遇到更多问题。即使您没有遇到异常，也有一些事情可以使SendConversationHistory 失败而不会出现错误，同时不会就您的活动未显示在聊天中的原因提供任何反馈。

您填充 ID 属性的策略是有风险的，因为您的机器人可能会在调用 SendConversationHistory 之前向对话发送消息。如果您的机器人在同一轮次中向用户发送了一条消息，它将具有您尝试分配给对话历史记录中活动的相同活动 ID。这将导致冲突，您不会看到活动显示。我建议以某种与 Direct Line 自动生成的 ID 值不同的独特方式格式化 ID。

通过修改如下代码，我能够成功发送您的活动：

foreach (var a in activities)
{
    incrementId++;
    // Use your own ID format
    a.Id = string.Concat("history|", incrementId.ToString().PadLeft(7, '0'));
    a.ChannelData = null;
    a.Conversation = new ConversationAccount(id: convId);

    if (a.From.Name == message.Recipient.Name)
    {
        // If the activity was from the bot, assign the user as the recipient
        a.Recipient = message.From;
        a.From = message.Recipient;
    }
    else
    {
        // If the activity was from the user, assign the bot as the recipient
        a.Recipient = message.Recipient;
        a.From = message.From;
    }
}