函数 ical.fromURL 不工作 AWS Lambda

Question

我正在处理 Alexa 技能可以使用的 Lambda 函数。我想要的只是一些简单的东西，可以读取事件并将信息发送回用户。为此，我使用 npm 库 ical.js https://www.npmjs.com/package/ical 和函数 ical.fromURL(url, options, function(err, data) {} ) 但问题是该函数永远不会执行。我有以下代码：

var Alexa = require("alexa-sdk");
var ical = require("ical");
var test = "This is a simple test 1";

exports.handler = function(event, context) {
   var alexa = Alexa.handler(event, context);
   alexa.registerHandlers(handlers);
   alexa.execute();
};

var handlers = {
   'LaunchRequest':function() {
       console.log(test);
       ical.fromURL('http://lanyrd.com/topics/nodejs/nodejs.ics', {}, function(err, data) {
           test = "Nothing changes";
       });
       console.log(test);
       test.emit(':tell', 'I am done');
    }
};

这是我在 ASK CLI output on cloudwatch as you can see the test text doesn't change, and would work if it was outside of the function(err, data){}. I don't believe there are any problems with reading in the calendar as the link http://lanyrd.com/topics/nodejs/nodejs.ics downloads a working ics file. The function activates if I try it in the https://npm.runkit.com/ical 工具中执行 "ask simulate -l en-US -t 'start calendar read'" 时从 could watch 得到的输出。所以我不确定我做错了什么。在 alexa 技能套件开发中测试时，技能作品也会给出响应。

Answer 1

您打错了 test.emit(':tell', 'I am done'); 而不是 this.emit(':tell', 'I am done');。

您的代码也不会 return 来自 url 的数据，因为 this.emit 将首先 return 而不是您的回调函数。为了return数据，需要把this.emit放在ical.fromURL的回调函数里面。

var handlers = {
   'LaunchRequest':function() {
       console.log(test);
       ical.fromURL('http://lanyrd.com/topics/nodejs/nodejs.ics', {}, (err, data) => {
           test = "Nothing changes";

           console.log(test);
           // you can edit the response here base on the data you receive.
           this.emit(':tell', `I am done: ${test}`);
       });
    }
};

函数 ical.fromURL 不工作 AWS Lambda

Function ical.fromURL not working AWS Lambda

icalendar

amazon-web-services

node.js

aws-lambda