我正在尝试为亚马逊Alexa写一个独特的Alexa技能。我想编写一个自定义Lambda函数，播放以下api（https://api.ense.nyc/latest）中包含的音频内容。
我已阅读亚马逊关于此主题的所有文档：
我对如何继续编写一个独特的lambda函数感到困惑。
答案 0 :(得分：0)
在alexa中播放音频比普通技巧有点棘手。
看起来你需要这样做：
- 解析你的JSON并创建一种包含音频网址和声卡的对象。
- 然后您需要将技能状态设置为PLAY_MODE，并使用问audioPlayerPlay()命令开始播放音频。 （https://developer.amazon.com/public/solutions/alexa/alexa-skills-kit/docs/custom-audioplayer-interface-reference#audioplayer-directives）
- 然后您需要设置音频事件处理程序以跟踪音频事件。
- 您需要设置意图以让用户播放下一个或上一个音频。
列表继续......
以下是解析XML Feed并播放音频的示例播客技巧
答案 1 :(得分：0)
以下代码在Lambda函数中用于播放第一个音频项目。请享用！
/**
* App ID for the skill
*/
//var APP_ID = undefined; //OPTIONAL: replace with "amzn1.echo-sdk-ams.app.[your-unique-value-here]";
/**
* The AlexaSkill prototype and helper functions
*/
var APP_ID = undefined;
//var AlexaSkill = require('./AlexaSkill');
//////
/**
Copyright 2014-2015 Amazon.com, Inc. or its affiliates. All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License"). You may not use this file except in compliance with the License. A copy of the License is located at
http://aws.amazon.com/apache2.0/
or in the "license" file accompanying this file. This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
*/
//////////////////////////////////////////////
//////////// /AlexaSkill.js File Starts /////
//////////////////////////////////////////////
'use strict';
function AlexaSkill(appId) {
this._appId = appId;
}
AlexaSkill.speechOutputType = {
PLAIN_TEXT: 'PlainText',
SSML: 'SSML'
}
AlexaSkill.prototype.requestHandlers = {
LaunchRequest: function (event, context, response) {
this.eventHandlers.onLaunch.call(this, event.request, event.session, response);
},
IntentRequest: function (event, context, response) {
this.eventHandlers.onIntent.call(this, event.request, event.session, response);
},
SessionEndedRequest: function (event, context) {
this.eventHandlers.onSessionEnded(event.request, event.session);
context.succeed();
}
};
/**
* Override any of the eventHandlers as needed
*/
AlexaSkill.prototype.eventHandlers = {
/**
* Called when the session starts.
* Subclasses could have overriden this function to open any necessary resources.
*/
onSessionStarted: function (sessionStartedRequest, session) {
},
/**
* Called when the user invokes the skill without specifying what they want.
* The subclass must override this function and provide feedback to the user.
*/
onLaunch: function (launchRequest, session, response) {
throw "onLaunch should be overriden by subclass";
},
/**
* Called when the user specifies an intent.
*/
onIntent: function (intentRequest, session, response) {
var intent = intentRequest.intent,
intentName = intentRequest.intent.name,
intentHandler = this.intentHandlers[intentName];
if (intentHandler) {
console.log('dispatch intent = ' + intentName);
intentHandler.call(this, intent, session, response);
} else {
throw 'Unsupported intent = ' + intentName;
}
},
/**
* Called when the user ends the session.
* Subclasses could have overriden this function to close any open resources.
*/
onSessionEnded: function (sessionEndedRequest, session) {
}
};
/**
* Subclasses should override the intentHandlers with the functions to handle specific intents.
*/
AlexaSkill.prototype.intentHandlers = {};
AlexaSkill.prototype.execute = function (event, context) {
try {
console.log("session applicationId: " + event.session.application.applicationId);
// Validate that this request originated from authorized source.
if (this._appId && event.session.application.applicationId !== this._appId) {
console.log("The applicationIds don't match : " + event.session.application.applicationId + " and "
+ this._appId);
throw "Invalid applicationId";
}
if (!event.session.attributes) {
event.session.attributes = {};
}
if (event.session.new) {
this.eventHandlers.onSessionStarted(event.request, event.session);
}
// Route the request to the proper handler which may have been overriden.
var requestHandler = this.requestHandlers[event.request.type];
requestHandler.call(this, event, context, new Response(context, event.session));
} catch (e) {
console.log("Unexpected exception " + e);
context.fail(e);
}
};
var Response = function (context, session) {
this._context = context;
this._session = session;
};
function createSpeechObject(optionsParam) {
if (optionsParam && optionsParam.type === 'SSML') {
return {
type: optionsParam.type,
ssml: optionsParam.speech
};
} else {
return {
type: optionsParam.type || 'PlainText',
text: optionsParam.speech || optionsParam
}
}
}
Response.prototype = (function () {
var buildSpeechletResponse = function (options) {
var alexaResponse = {
outputSpeech: createSpeechObject(options.output),
shouldEndSession: options.shouldEndSession
};
if (options.reprompt) {
alexaResponse.reprompt = {
outputSpeech: createSpeechObject(options.reprompt)
};
}
if (options.cardTitle && options.cardContent) {
alexaResponse.card = {
type: "Simple",
title: options.cardTitle,
content: options.cardContent
};
}
var returnResult = {
version: '1.0',
response: alexaResponse
};
if (options.session && options.session.attributes) {
returnResult.sessionAttributes = options.session.attributes;
}
return returnResult;
};
return {
tell: function (speechOutput) {
this._context.succeed(buildSpeechletResponse({
session: this._session,
output: speechOutput,
shouldEndSession: true
}));
},
tellWithCard: function (speechOutput, cardTitle, cardContent) {
this._context.succeed(buildSpeechletResponse({
session: this._session,
output: speechOutput,
cardTitle: cardTitle,
cardContent: cardContent,
shouldEndSession: true
}));
},
ask: function (speechOutput, repromptSpeech) {
this._context.succeed(buildSpeechletResponse({
session: this._session,
output: speechOutput,
reprompt: repromptSpeech,
shouldEndSession: false
}));
},
askWithCard: function (speechOutput, repromptSpeech, cardTitle, cardContent) {
this._context.succeed(buildSpeechletResponse({
session: this._session,
output: speechOutput,
reprompt: repromptSpeech,
cardTitle: cardTitle,
cardContent: cardContent,
shouldEndSession: false
}));
}
};
})();
//////////////////////////////////////////////
///////////// AlexaSkill.js File Ends //////
//////////////////////////////////////////////
'use strict';
function AlexaSkill(appId) {
this._appId = appId;
}
AlexaSkill.speechOutputType = {
PLAIN_TEXT: 'PlainText',
SSML: 'SSML'
}
AlexaSkill.prototype.requestHandlers = {
LaunchRequest: function (event, context, response) {
this.eventHandlers.onLaunch.call(this, event.request, event.session, response);
},
IntentRequest: function (event, context, response) {
this.eventHandlers.onIntent.call(this, event.request, event.session, response);
},
SessionEndedRequest: function (event, context) {
this.eventHandlers.onSessionEnded(event.request, event.session);
context.succeed();
}
};
/**
* Override any of the eventHandlers as needed
*/
AlexaSkill.prototype.eventHandlers = {
/**
* Called when the session starts.
* Subclasses could have overriden this function to open any necessary resources.
*/
onSessionStarted: function (sessionStartedRequest, session) {
},
/**
* Called when the user invokes the skill without specifying what they want.
* The subclass must override this function and provide feedback to the user.
*/
onLaunch: function (launchRequest, session, response) {
throw "onLaunch should be overriden by subclass";
},
/**
* Called when the user specifies an intent.
*/
onIntent: function (intentRequest, session, response) {
var intent = intentRequest.intent,
intentName = intentRequest.intent.name,
intentHandler = this.intentHandlers[intentName];
if (intentHandler) {
console.log('dispatch intent = ' + intentName);
intentHandler.call(this, intent, session, response);
} else {
throw 'Unsupported intent = ' + intentName;
}
},
/**
* Called when the user ends the session.
* Subclasses could have overriden this function to close any open resources.
*/
onSessionEnded: function (sessionEndedRequest, session) {
}
};
/**
* Subclasses should override the intentHandlers with the functions to handle specific intents.
*/
AlexaSkill.prototype.intentHandlers = {};
AlexaSkill.prototype.execute = function (event, context) {
try {
console.log("session applicationId: " + event.session.application.applicationId);
// Validate that this request originated from authorized source.
if (this._appId && event.session.application.applicationId !== this._appId) {
console.log("The applicationIds don't match : " + event.session.application.applicationId + " and "
+ this._appId);
throw "Invalid applicationId";
}
if (!event.session.attributes) {
event.session.attributes = {};
}
if (event.session.new) {
this.eventHandlers.onSessionStarted(event.request, event.session);
}
// Route the request to the proper handler which may have been overriden.
var requestHandler = this.requestHandlers[event.request.type];
requestHandler.call(this, event, context, new Response(context, event.session));
} catch (e) {
console.log("Unexpected exception " + e);
context.fail(e);
}
};
var Response = function (context, session) {
this._context = context;
this._session = session;
};
function createSpeechObject(optionsParam) {
if (optionsParam && optionsParam.type === 'SSML') {
return {
type: optionsParam.type,
ssml: optionsParam.speech
};
} else {
return {
type: optionsParam.type || 'PlainText',
text: optionsParam.speech || optionsParam
}
}
}
Response.prototype = (function () {
var buildSpeechletResponse = function (options) {
var alexaResponse = {
outputSpeech: createSpeechObject(options.output),
shouldEndSession: options.shouldEndSession
};
if (options.reprompt) {
alexaResponse.reprompt = {
outputSpeech: createSpeechObject(options.reprompt)
};
}
if (options.cardTitle && options.cardContent) {
alexaResponse.card = {
type: "Simple",
title: options.cardTitle,
content: options.cardContent
};
}
var returnResult = {
version: '1.0',
response: alexaResponse
};
if (options.session && options.session.attributes) {
returnResult.sessionAttributes = options.session.attributes;
}
return returnResult;
};
return {
tell: function (speechOutput) {
this._context.succeed(buildSpeechletResponse({
session: this._session,
output: speechOutput,
shouldEndSession: true
}));
},
tellWithCard: function (speechOutput, cardTitle, cardContent) {
this._context.succeed(buildSpeechletResponse({
session: this._session,
output: speechOutput,
cardTitle: cardTitle,
cardContent: cardContent,
shouldEndSession: true
}));
},
ask: function (speechOutput, repromptSpeech) {
this._context.succeed(buildSpeechletResponse({
session: this._session,
output: speechOutput,
reprompt: repromptSpeech,
shouldEndSession: false
}));
},
askWithCard: function (speechOutput, repromptSpeech, cardTitle, cardContent) {
this._context.succeed(buildSpeechletResponse({
session: this._session,
output: speechOutput,
reprompt: repromptSpeech,
cardTitle: cardTitle,
cardContent: cardContent,
shouldEndSession: false
}));
},
justUseThisJsonPlease: function(json) {
this._context.succeed(json);
}
};
})();
//////
var https = require('https');
var Fact = function () {
AlexaSkill.call(this, APP_ID);
};
// Extend AlexaSkill
Fact.prototype = Object.create(AlexaSkill.prototype);
Fact.prototype.constructor = Fact;
Fact.prototype.eventHandlers.onSessionStarted = function (sessionStartedRequest, session) {
console.log("onSessionStarted requestId: " + sessionStartedRequest.requestId + ", sessionId: " + session.sessionId);
// any initialization logic goes here
};
Fact.prototype.eventHandlers.onLaunch = function (launchRequest, session, response) {
console.log("onLaunch requestId: " + launchRequest.requestId + ", sessionId: " + session.sessionId);
//handleEnseFeed(response)
};
/**
* Overridden to show that a subclass can override this function to teardown session state.
*/
Fact.prototype.eventHandlers.onSessionEnded = function (sessionEndedRequest, session) {
//console.log("onSessionEnded requestId: " + sessionEndedRequest.requestId + ", sessionId: " + session.sessionId);
// any cleanup logic goes here
};
Fact.prototype.intentHandlers = {
"PlayAudio": function (event, context, response) {
//response.tell('ense is lit')
//handleEnseFeed(response)
fetchEnseParse("/latest", function(body) {
if(body == "error") {
}
else {
var directives = body.enses.map(function(ense) {
var a = ense[1].fileUrl;
return {
'playBehavior': 'REPLACE_ALL',
'audioItem':
{
'stream':
{
'url': 'https://s3.amazonaws.com/media.ense.nyc/enses/2017_01_13T16_57_20.190Z/30312/0',
'token': '33529',
'offsetInMilliseconds': 0
}
},
'type': 'AudioPlayer.Play'
};
})
}
var jsonresponse = {
'outputSpeech': {
'text': '',
'type': 'PlainText'
},
'directives': [directives[0]]
};
response.justUseThisJsonPlease( { response: jsonresponse } );
//queueNext();
});
},
"AudioPlayer.PlaybackNearlyFinished" : function(event, context, response) {
//console.log(JSON.stringify(intent));
//console.log(JSON.stringify(session));
//console.log(JSON.stringify(response));
// console.log("dog")
// var stream = {
// "url": "https://s3.amazonaws.com/media.ense.nyc/enses/violetindigoviolet/30034/0",
// "token": "some_token",
// "expectedPreviousToken": "33529",
// "offsetInMilliseconds": 0
// };
// response.audioPlayerPlayStream("ENQUEUE", stream);
// response.justUseThisJsonPlease( { response: stream } );
var second =
{
"type": "AudioPlayer.Play",
"playBehavior": "REPLACE_ENQUEUED",
"audioItem": {
"stream": {
"url": "https://s3.amazonaws.com/media.ense.nyc/enses/violetindigoviolet/30034/0",
"token": "33530",
// "expectedPreviousToken": "33529",
"offsetInMilliseconds": 0
}
}
}
response.justUseThisJsonPlease( { response: second } );
},
"AudioPlayer.PlaybackFinished" : function(event, context, response) {
var speechOutput = "Goodbye";
response.tell(speechOutput);
},
"AMAZON.HelpIntent": function (intent, session, response) {
response.ask("You can say play ense feed or, you can say exit... What can I help you with?", "What can I help you with?");
},
"AMAZON.StopIntent": function (intent, session, response) {
var speechOutput = "Goodbye";
response.tell(speechOutput);
},
"AMAZON.CancelIntent": function (intent, session, response) {
var speechOutput = "Goodbye";
response.tell(speechOutput);
}
};
function queueNext(event, second) {
console.log ('trains')
var response = {
'outputSpeech':
{
'text': '',
'type': 'PlainText'
},
'directives':
[
{
'playBehavior': 'REPLACE_ALL',
'audioItem':
{
'stream':
{
'url': 'https://s3.amazonaws.com/media.ense.nyc/enses/violetindigoviolet/30034/0',
'token': '33529',
'offsetInMilliseconds': 10000
}
},
'type': 'AudioPlayer.Play'}
]
};
// second.succeed( { response: response } );
}
function handleEnseFeed(response) {
https.get('https://api.ense.nyc/latest', function (res) {
var body = '';
if (res.statusCode != 200)
res.on('data', function (chunk) {
body += chunk;
});
res.on('end', function (par1, par2) {
body = JSON.parse(body);
var enses = body.enses;
response._context.succeed(thisResponse);
}).on('error', function (e) {
});
});
}
function fetchEnseParse(url, handler) {
const getEnseOptions = {
host : "api.ense.nyc",
path : url
};
const req = https.request(getEnseOptions, (res) => {
var body = '';
res.setEncoding('utf8');
res.on('data', (chunk) => body += chunk);
res.on('end', () => {
// If we know it's JSON, parse it
if (res.headers['content-type'] && res.headers['content-type'].indexOf('application/json') != -1) {
body = JSON.parse(body);
handler(body);
} else {
handler("error");
}
});
});
req.on('error', function() {
handler("error");
});
req.end();
};
// Create the handler that responds to the Alexa Request.
exports.handler = function (event, context) {
// Create an instance of the SpaceGeek skill.
var fact = new Fact();
console.log("tractor")
// queueNext();
// var api = testFuntion();
fact.execute(event, context);
};