使用 amazon lex "Invalid Lambda Response: Received invalid response from Lambda" 时出现错误

Question

我正在尝试使用 AWS Lex 开发聊天机器人。但不幸的是，我在 Lex 上建立聊天时遇到错误。我正在使用一个意图和 2 个插槽。由于某些原因，当 lambda 函数连接到聊天时，槽的第二个值被保存为 null。但是当我运行它在 lambda 中作为测试用例时，它是成功的。现在，我只想在输入插槽详细信息后显示一条响应消息。

这是我的代码

public class LexBot implements RequestHandler<Map<String, Object>, Object> {

    @Override
    public Object handleRequest(Map<String, Object> input, Context context) {
        // LexRequest lexRequest = LexRequestFactory.createLexRequest(input);

        String content = "Request came from the bot: ";
        Message message = new Message("PlainText", content);
        DialogAction dialogAction = new DialogAction("Close", "Fullfiled", message);

        return new LexRespond(dialogAction);
    }
}

这是我在 AWS Lex 中遇到的错误：

An error has occurred: Invalid Lambda Response: Received invalid response from Lambda: Can not construct instance of Message, problem: content must not be blank at [Source: {"dialogAction":{"type":"Close","message":{"contentType":"PlainText","some_respond_message":"Request came from the bot: "}}}; line: 1, column: 122]

Answer 1

根据 docs，以下是构造最终响应的正确格式：

{
        "sessionAttributes": session_attributes,
        "dialogAction":{
            "type":"Close",
            "fulfillmentState":"Fulfilled",
            "message":{
                "contentType":"PlainText",
                "content":message
            }
        }
    }

使用此格式构建响应以避免错误。

Answer 2

您拼错了“fulfilled”- 您输入的是粘贴在下面的“Fullfiled”： DialogAction dialogAction = new DialogAction("Close", "Fullfiled", message);

Answer 3

如果您使用的是 amazon lexv2，那么与 lexv1 相比，amazon lex 期待不同的 JSON 响应。

lex 接受的 lambda 响应示例：

{
  "sessionState": {
    "dialogAction": {
      "type": "Close"
    },
    "intent": {
      "confirmationState": "Confirmed",
      "name": "SearchProducts",
      "state": "Fulfilled",
      
    },
    
  },
  "messages": [
    {
      "contentType": "PlainText",
      "content": "Select from the list",
      
    }
  ]
}

在此处查看完整的响应结构https://docs.aws.amazon.com/lexv2/latest/dg/lambda.html

使用 amazon lex "Invalid Lambda Response: Received invalid response from Lambda" 时出现错误

Obtaining error while using amazon lex "Invalid Lambda Response: Received invalid response from Lambda"

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aws-lambda

amazon-lex