SDK v2 上的 Alexa 和 Lambda 的 HTTP 请求，如何使其工作?

本文介绍了SDK v2 上的 Alexa 和 Lambda 的 HTTP 请求，如何使其工作?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在使用 Amazon 提供的 ASK SDK v2 来制作 Alexa 技能，但我遇到了架构问题:

I am playing with ASK SDK v2 provided by Amazon in order to make Skill for Alexa but I face an architectural problem :

首先，HTTP 请求就像一个魅力，但我想当且仅当我的 HTTP 请求完成时才返回语音响应，但我什至不知道这是否可能，因为处理"功能应该返回一些东西(看看评论):

First of all, the HTTP request works like a charm but I would like to return speach response if and only if my HTTP request is complete but I don't even know if it's possible because of the "handle" function that should return something (look at comments) :

const MyIntentHandler = { canHandle(handlerInput) { const request = handlerInput.requestEnvelope.request; return request.type === 'LaunchRequest' || (request.type === 'IntentRequest' && request.intent.name === 'MyIntent'); }, handle(handlerInput) { var options = { host: 'foo', port: 80, path: '/mypath', method: 'GET' }; var req = http.request(options, function(result){ result.on("end", function(){ //I would like to return speak here like that : //return handlerInput.responseBuilder.speak("It works").withSimpleCard("MyTestApp", "It works").getResponse() }) }); req.end(); //And I would like to remove this line to manage response in result.on("end", function(){}) above return handlerInput.responseBuilder.speak("It works").withSimpleCard("MyTestApp", "It works").getResponse(); }, };

有什么办法处理这个问题吗?

Any idea to deal with this ?

推荐答案

我找到了官方的方法:

1) 创建一个管理 http 请求并返回一个 promise 的新函数:

1) Create a new funtion that manage http request and return a promise :

function httpGet(options) { return new Promise(((resolve, reject) => { const request = http.request(options, (response) => { response.setEncoding('utf8'); let returnData = ''; if (response.statusCode < 200 || response.statusCode >= 300) { return reject(new Error(`${response.statusCode}: ${response.req.getHeader('host')} ${response.req.path}`)); } response.on('data', (chunk) => { returnData += chunk; }); response.on('end', () => { resolve(JSON.parse(returnData)); }); response.on('error', (error) => { reject(error); }); }); request.on('error', function (error) { reject(error); }); request.end(); })); }

2) 在 Intent 中，返回一个调用 httpGet 函数的承诺:

2) In the Intent, return a promise in which you call your httpGet function :

const MyIntentHandler = { canHandle(handlerInput) { const request = handlerInput.requestEnvelope.request; return request.type === 'LaunchRequest' || (request.type === 'IntentRequest' && request.intent.name === 'MyIntent'); }, handle(handlerInput) { var options = { host: 'foo', port: 80, path: '/mypath', method: 'GET' }; return new Promise((resolve, reject) => { httpGet(options).then((response) => { resolve(handlerInput.responseBuilder.speak("It is done.").getResponse()); }).catch((error) => { resolve(handlerInput.responseBuilder.speak('Thor is not available at the moment. Please try again later or contact your administrator.') .getResponse()); }); }); }, };

这是正确执行此操作的方法.我的示例基于 alexa petmatch 示例.

This is the way to do it properly. My example is base on alexa petmatch sample.