Dialogflow es 如何从Dialogflow CX webhook发回音频？

我使用这段代码从Node.JS Dialogflow CX webhook发回文本响应。我想播放一段音频，以便将指向该音频的链接发送回

如何发回音频文件链接

const express = require("express");
const app = express();
const bodyParser = require("body-parser");

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({
    extended: false
}));

app.post("/webhook", (request, response) => {
    let tag = request.body.fulfillmentInfo.tag;
    let jsonResponse = {};
    if (tag == "hello") {
        //fulfillment response to be sent to the agent if the request tag is equal to "welcome tag"
        jsonResponse = {
            fulfillment_response: {
                messages: [{
                    text: {
                        //fulfillment text response to be sent to the agent
                        text: ["Hi! This is a webhook response"]
                    }
                }]
            }
        };
    } else {
        jsonResponse = {
            //fulfillment text response to be sent to the agent if there are no defined responses for the specified tag
            fulfillment_response: {
                messages: [{
                    text: {
                        ////fulfillment text response to be sent to the agent
                        text: [
                            `There are no fulfillment responses defined for "${tag}"" tag`
                        ]
                    }
                }]
            }
        };
    }
    response.json(jsonResponse);
});

const listener = app.listen(3000, () => {
    console.log("Your app is listening on port " + listener.address().port);
});

---

要利用音频URI，必须将其添加到“jsonResponse”中。您需要通过以下字段将其分层到webhookResponse中：jsonResponse.fulfillment\u response.messages

“play_audio”将指定要播放的音频剪辑URI。此URI必须是公共URI

例如（播放音频）：

请注意，这些音频响应目前仅适用于Dialogflow，如Avaya或AudioCodes，或者您可以使用创建自己的自定义集成。并非所有音频文件都适用于Avaya和AudioCodes，因此我建议使用.WAV文件，因为它们同时适用于两者

如果您使用的是自定义集成，则可以创建自己的实现以支持首选音频格式

jsonResponse = { 
    fulfillment_response: { 
        messages: [{ 
            play_audio: { 
                audio_uri: `https://URI.EXAMPLE.WAV`
            } 
        }] 
    } 
};