DialogFlow：为什么此 Webhook 响应失败 'empty speech response'

Question

为什么这个特定的 webhook 响应（由 DialogFlow 传递回 Google Assistant）

    {
      "fulfillmentMessages" : [ {
        "payload" : {
          "google" : {
        "richResponse" : {
          "items" : [ {
            "simpleResponse" : {
              "textToSpeech" : "And are you male or female?"
            }
          } ]
        },
        "expectUserResponse" : true
          }
        },
        "text" : {
          "text" : [ "And are you male or female?" ]
        }
      }, {
        "quickReplies" : {
          "quickReplies" : [ "Male", "Female" ]
        }
      } ],
      "fulfillmentText" : "And are you male or female?",
      "outputContexts" : [ ... ]
    }

错误为：

"MalformedResponse: Failed to parse Dialogflow response into AppResponse because of empty speech response" 

Answer 1

在 Google 助手的情况下，响应不是 fulfillmentMessages 的一部分，而是在 payload 对象中，该对象应位于响应的顶层。

请注意，quickReplies 和 text 对 Dialogflow fulfillment 消息有效，但对 Google Assistant 也无效。相反，您应该使用 simpleResponse 和 suggestions 字段并将它们放在响应中。

因此，例如这里是 Google 助手的回复，它由建议卡片和一个简单的回复组成：

{
  payload: {
    google: {
      richResponse: {
        items: [{
          simpleResponse: {
            textToSpeech: "Are you male or female"
          }
        }],
        suggestions: [
          { title: 'Male' },
          { title: 'Female' }
        ]
      }
    }
  },
  outputContexts: [...]
}

对于 Dialogflow 实现消息（例如在 Dialogflow 控制台中），它应该是这样的：

{
  fulfillmentMessages: [
    { text: { text: ['Are you male or female'] } },
    { quickReplies: { quickReplies: ['Male', 'Female'] } } 
  ],
  outputContexts: [...]
}

希望对您有所帮助。