Question

我使用nodeJS代码使用请求模块进行休息调用。我也使用了回调函数，但请求函数没有被执行。

我的流程转到searchTSTData函数，但请求方法没有被执行。

从回调函数我只得到responseString =＆＃39;然而，要使查询休息＆＃39;我在searchTSTData函数中初始化了。它没有根据API返回的响应进行更新，该响应应该是错误或成功响应字符串。

我已将模块包含在zip中，因为lambda没有抛出错误并通过测试。此外，我确信请求模块在Cloudwatch日志中不起作用我没有看到我在请求中写的任何console.logs。

请说明我哪里出错了。我是NodeJS的新手。

这是代码 -

'use strict';
const request = require('request');
const Alexa = require('alexa-sdk');
const APP_ID = 'amzn1.ask.skill.80a49cf5-254c-123a-a456-98745asd21456';  

const languageStrings = {
    'en': {
        translation: {
            TST: [
                'A year on Mercury is just 88 days long.',
            ],
            SKILL_NAME: 'TEST',
            GET_TST_MESSAGE: "Here's your TST: You searched for ",
            HELP_MESSAGE: 'You can say get me a TST, or, you can say exit... What can I help you with?',
            HELP_REPROMPT: 'What can I help you with?',
            STOP_MESSAGE: 'Goodbye!',
        },
    },
};

const handlers = {
    'LaunchRequest': function () {
        this.emit('GetTST');
    },
    'GetNewTSTIntent': function () {
        this.emit('GetTST');
    },
    'GetTST': function () {
        // Get a random space fact from the space facts list
        // Use this.t() to get corresponding language data
        const inputValue = this.event.request.intent.slots.Search.value;
        var finalResponse = "Some error occurred in code. Please try again later.";
        console.log('Input recieved as '+inputValue);

        searchTSTData(inputValue, function (response){
        console.log('trying to call');
                        finalResponse = response;                                                    
         });

         console.log("after function call");

        // Create speech output
        const speechOutput = this.t('GET_TST_MESSAGE')  + inputValue+". Here are the results " +finalResponse;
        this.emit(':tellWithCard', speechOutput, this.t('SKILL_NAME'), speechOutput);
    },
    'AMAZON.HelpIntent': function () {
        const speechOutput = this.t('HELP_MESSAGE');
        const reprompt = this.t('HELP_MESSAGE');
        this.emit(':ask', speechOutput, reprompt);
    },
    'AMAZON.CancelIntent': function () {
        this.emit(':tell', this.t('STOP_MESSAGE'));
    },
    'AMAZON.StopIntent': function () {
        this.emit(':tell', this.t('STOP_MESSAGE'));
    },
};

exports.handler = function (event, context) {
    const alexa = Alexa.handler(event, context);
    alexa.APP_ID = APP_ID;
    // To enable string internationalization (i18n) features, set a resources object.
    alexa.resources = languageStrings;
    alexa.registerHandlers(handlers);
    alexa.execute();
};


function searchTSTData(searchString,callback){
    var responseString = 'Yet to make query rest';

    request({
    url: 'https://api.google.com/getresultsInJson',
    method: 'GET'
    }, function (error, response, body) {
            if (error) {
                responseString = 'Error received from rest api. Please try again after some time.';
                } else if(response.statusCode===200){
                responseString = 'Sucess Success';
                }else{
                responseString = 'Nothing is working'; 
                }
            });
            callback(responseString);
           }

Answer 1

是你在VPC中的lambda方法吗？检查此http://docs.aws.amazon.com/lambda/latest/dg/vpc.html您需要提供外部访问权限

Answer 2

当您致电this.emit()时，Alexa-SDK会结束您的lambda事件循环。

在您的示例中，您正在调用request()，它正在异步工作。在调用request()（通过searchTSTData()）后，您立即发出this.emit()，这会结束事件循环并使响应无法处理。

为了处理您的回复，您希望保持对this.emit()的调用：

const handlers = {
  'GetTST': function () {
    searchTSTData(inputValue, (response) => {
      const speechOutput = response;
      this.emit(':tell', speechOutput);
    });
  }
};

在此处阅读有关nodejs下的lambda函数的编程模型：http://docs.aws.amazon.com/lambda/latest/dg/nodejs-prog-model-handler.html

AWS Lambda无法对外部API进行REST调用

2 个答案: