如何在 Amazon-Lex 中使用图像进行响应

Question

我在显示图像作为响应时遇到错误。我收到此错误：

An error has occurred: Invalid Lambda Response: Received invalid response from Lambda: Unrecognized field "responseCard" (class IntentResponse), not marked as ignorable at [Source: {"sessionAttributes":{},"dialogAction":{"type":"Close","fulfillmentState":"Fulfilled","message":{"contentType":"PlainText","content":"

function close(sessionAttributes, fulfillmentState, message) {
    return {
        sessionAttributes,
        dialogAction: {
            type: 'Close',
            fulfillmentState,
            message,
        },
        responseCard: {
            version: '2',
            contentType: "application/vnd.amazonaws.card.generic",
            genericAttachments: [
                  {
                     imageUrl:"URL of the image to be shown",
                  }
               ] 
        }
    };
}

exports.handler = (event, context, callback) => {
    console.log( "EVENT= "+JSON.stringify(event) );

    const intentName = event.currentIntent.name;
    var sessionAttributes = event.sessionAttributes;

    var responseMsg = "";

    if (intentName == "greetings") {
        var message = {
            'contentType': 'PlainText', 
            'content': 'Hi! How can I help you?'
        }

        responseMsg = close( sessionAttributes, 'Fulfilled', message );
    }
    else {
        console.log( "ERROR unhandled intent named= "+intentName );
        responseMsg = close( sessionAttributes, 'Fulfilled', {"contentType":"PlainText", "content":"Sorry, I can't help with that yet."});
    }

    console.log( "RESPONSE= "+JSON.stringify(responseMsg) );
    callback(null,responseMsg);
}

我应该如何在聊天框上显示图像？我在这里犯了什么错误？

Answer 1

responseCard 需要在 dialogAction 内。

尝试：

function close(sessionAttributes, fulfillmentState, message) {
    return {
        sessionAttributes,
        "dialogAction": {
            "type": "Close",
            fulfillmentState,
            message,
            "responseCard": {
                "version": "2",
                "contentType": "application/vnd.amazonaws.card.generic",
                "genericAttachments": [
                      {
                         "imageUrl":"http://...",
                      }
                ] 
            }
        }
    };
}

为了安全起见，我还给不是变量的键加了引号。

---

有关响应卡的更多信息：

ResponseCard format：内容类型、通用附件、版本
GenericAttachments format：附件链接网址、按钮、图片网址、副标题、标题
Buttons format：文本，值
None 是必需的，但这里是所有 responseCard 属性的示例：

"responseCard": {
  "version": integer-value,                                     //change to integer
  "contentType": "application/vnd.amazonaws.card.generic",      //don't change
  "genericAttachments": [
      {
         "title":"card-title",                                  //change to any string         
         "subTitle":"card-sub-title",                           //change to any string 
         "imageUrl":"http://...",                               //change to full url 
         "attachmentLinkUrl":"http://...",                      //change to full url 
         "buttons":[ 
             {
                "text":"button-text",                           //change to any string 
                "value":"Value sent to server on button click"  //change to any string
             }
          ]
       } 
   ] 
}