只需播放5-10秒的音频，然后自动停止Alexa技能

Question

我在Alexa中创造了一种音频技能。但是，与此有关的一个问题是，它只播放音频几秒钟，然后将其停止。

我的代码：

const Alexa = require('ask-sdk-core');

let currentAudioNum = 0;
let skill;
const STREAMS = [
  {
.........
  },
  {
.........
  },
];

const PlayStreamIntentHandler = {
  canHandle(handlerInput) {
    return handlerInput.requestEnvelope.request.type === 'LaunchRequest' ||
        (handlerInput.requestEnvelope.request.type === 'IntentRequest'
        && handlerInput.requestEnvelope.request.intent.name === 'PlayStreamIntent') ||
        (handlerInput.requestEnvelope.request.type === 'IntentRequest'
        && handlerInput.requestEnvelope.request.intent.name === 'AMAZON.ResumeIntent');
  },
  handle(handlerInput) {

    let stream = STREAMS[currentAudioNum];

    handlerInput.responseBuilder
      .speak(`starting swaminarayan kirtan bhakti`)
      .addAudioPlayerPlayDirective('REPLACE_ALL', stream.url, stream.token, 0, null, stream.metadata);

    return handlerInput.responseBuilder
      .getResponse();
  },
};

const PlayNextStreamIntentHandler = {
  canHandle(handlerInput) {
    return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'AMAZON.NextIntent';
  },
  handle(handlerInput) {

    currentAudioNum = currentAudioNum + 1;
    let stream = STREAMS[currentAudioNum];

    handlerInput.responseBuilder
      .addAudioPlayerPlayDirective('REPLACE_ALL', stream.url, stream.token, 0, null, stream.metadata);

    return handlerInput.responseBuilder
      .getResponse();
  },
};

const PlayPrevStreamIntentHandler = {
  canHandle(handlerInput) {
    return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'AMAZON.PreviousIntent';
  },
  handle(handlerInput) {

    currentAudioNum = currentAudioNum - 1;
    let stream = STREAMS[currentAudioNum];

    handlerInput.responseBuilder
      .addAudioPlayerPlayDirective('REPLACE_ALL', stream.url, stream.token, 0, null, stream.metadata);

    return handlerInput.responseBuilder
      .getResponse();
  },
};

const HelpIntentHandler = {
  canHandle(handlerInput) {
    return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'AMAZON.HelpIntent';
  },
  handle(handlerInput) {
    const speechText = 'This skill just plays an audio stream when it is started. It does not have any additional functionality.';

    return handlerInput.responseBuilder
      .speak(speechText)
      .reprompt(speechText)
      .getResponse();
  },
};

const AboutIntentHandler = {
  canHandle(handlerInput) {
    return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'AboutIntent';
  },
  handle(handlerInput) {
    const speechText = 'This is an audio starter template from skill templates dot com';

    return handlerInput.responseBuilder
      .speak(speechText)
      .reprompt(speechText)
      .getResponse();
  },
};

const CancelAndStopIntentHandler = {
  canHandle(handlerInput) {
    return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && (handlerInput.requestEnvelope.request.intent.name === 'AMAZON.StopIntent'
        || handlerInput.requestEnvelope.request.intent.name === 'AMAZON.PauseIntent');
  },
  handle(handlerInput) {

    handlerInput.responseBuilder
      .addAudioPlayerClearQueueDirective('CLEAR_ALL')
      .addAudioPlayerStopDirective();

    return handlerInput.responseBuilder
      .getResponse();
  },
};

const PlaybackStoppedIntentHandler = {
  canHandle(handlerInput) {
    return handlerInput.requestEnvelope.request.type === 'AudioPlayer.PlaybackStopped';
  },
  handle(handlerInput) {
    //should save details so play can be resumed. 
    return true;
  },
};

//AudioPlayer.PlaybackStarted
const PlaybackStartedIntentHandler = {
  canHandle(handlerInput) {
    return handlerInput.requestEnvelope.request.type === 'AudioPlayer.PlaybackStarted';
  },
  handle(handlerInput) {
    handlerInput.responseBuilder
      .addAudioPlayerClearQueueDirective('CLEAR_ENQUEUED');

    return handlerInput.responseBuilder
      .getResponse();
  },
};

const SessionEndedRequestHandler = {
  canHandle(handlerInput) {
    return handlerInput.requestEnvelope.request.type === 'SessionEndedRequest'
    && (handlerInput.requestEnvelope.request.intent.name === 'AMAZON.PauseIntent');
  },
  handle(handlerInput) {
    console.log(`Session ended with reason: ${handlerInput.requestEnvelope.request.reason}`);

    return handlerInput.responseBuilder
      .getResponse();
  },
};

//System.ExceptionEncountered
const ExceptionEncounteredRequestHandler = {
  canHandle(handlerInput) {
    return handlerInput.requestEnvelope.request.type === 'System.ExceptionEncountered';
  },
  handle(handlerInput) {
    console.log(`Session ended with reason: ${handlerInput.requestEnvelope.request.reason}`);

    return true;
  },
};

const ErrorHandler = {
  canHandle() {
    return true;
  },
  handle(handlerInput, error) {
    console.log(`Error handled: ${error.message}`);

    return handlerInput.responseBuilder
      .addAudioPlayerClearQueueDirective('CLEAR_ALL')
      .addAudioPlayerStopDirective()
      .getResponse();
  },
};

exports.handler = async function (event, context) {
  console.log(`REQUEST++++${JSON.stringify(event)}`);
  if (!skill) {
    skill = Alexa.SkillBuilders.custom()
      .addRequestHandlers(
        PlayStreamIntentHandler,
        PlayNextStreamIntentHandler,
        PlayPrevStreamIntentHandler,
        PlaybackStartedIntentHandler,
        CancelAndStopIntentHandler,
        PlaybackStoppedIntentHandler,
        AboutIntentHandler,
        HelpIntentHandler,
        ExceptionEncounteredRequestHandler,
        SessionEndedRequestHandler
      )
      .addErrorHandlers(ErrorHandler)
      .create();
  }

  return skill.invoke(event,context);
}