javascript - 通过 lambda 函数进行 Alexa API 请求

Question

我正在创建 Alexa 技能，并通过 AWS Lambda 托管我的 NodeJS 代码。

我需要从 API 访问数据并将其拉入我的 Lambda 函数以返回给 Alexa。如何使用 Express 或 jQuery 等包来允许通过我的 Lambda 函数发出 API 请求？

<小时/>

我找到了verbose/complex ways安装 npm 软件包，但正在寻找是否有更好/不同的方法来执行此操作

我使用了 nodeJS http 请求。将此请求包含在 getWelcomeResponse() 中并在 Alexa Dev 中进行测试，我得到

The remote endpoint could not be called, or the response it returned was invalid.

没有 HTTP 请求，它返回预期的 json 响应

 function getWelcomeResponse(callback) {

    console.log('GET WELCOME RESPONSE');

    var options = {
        host: 'http://clg-api-dev.elasticbeanstalk.com',
        port: 7474,
        path: '/1.0/leveldata/3',
        method: 'GET',
        headers: {
            accept: 'application/json'
        }
    };

    var x = http.request(options,function(res){
        console.log("Connected");

        res.on('data',function(data){

            console.log('My Data: ', data);

            var sessionAttributes = {},
            speechOutput = "Reindeer Games. I will ask you " + GAME_LENGTH.toString()
                + " questions, try to get as many right as you can. Just say the number of the answer. Let's begin. ",
            shouldEndSession = false,

            gameQuestions = populateGameQuestions(),

            sessionAttributes = {
                "speechOutput": repromptText,
                "repromptText": repromptText,
                "currentQuestionIndex": currentQuestionIndex,
                "correctAnswerIndex": correctAnswerIndex + 1,
                "questions": gameQuestions,
                "score": 0,
                "correctAnswerText":
                    questions[gameQuestions[currentQuestionIndex]][Object.keys(questions[gameQuestions[currentQuestionIndex]])[0]][0]
            };
            callback(sessionAttributes, buildSpeechletResponse(CARD_TITLE, speechOutput, repromptText, shouldEndSession));

        });
    });

    x.end();
}

Cloudwatch 错误日志:

START RequestId: e293453f-fc30-11e5-ae18-8723f88b4bb0 Version: $LATEST 
2016-04-06T19:50:59.657Z    e293453f-fc30-11e5-ae18-8723f88b4bb0    event.session.application.applicationId=amzn1.echo-sdk-ams.app.e8233bb6-ce2d-4a6c-8f82-e947d58d3bad 
2016-04-06T19:50:59.767Z    e293453f-fc30-11e5-ae18-8723f88b4bb0    onLaunch requestId=EdwRequestId.f6baa34c-bfc1-4758-b74d-9874d970c10e, sessionId=SessionId.7063c3b5-b2c0-4b1d-9180-d79aaeed9a49 
2016-04-06T19:50:59.768Z    e293453f-fc30-11e5-ae18-8723f88b4bb0    GET WELCOME RESPONSE 
2016-04-06T19:50:59.934Z    e293453f-fc30-11e5-ae18-8723f88b4bb0    Error: getaddrinfo ENOTFOUND at errnoException (dns.js:37:11) at Object.onanswer [as oncomplete] (dns.js:126:16) 
END RequestId: e293453f-fc30-11e5-ae18-8723f88b4bb0 
REPORT RequestId: e293453f-fc30-11e5-ae18-8723f88b4bb0  Duration: 315.42 ms Billed Duration: 400 ms Memory Size: 128 MB Max Memory Used: 14 MB   
Process exited before completing request 

其中错误是 Object.onanswer 处的 getaddrinfo ENOTFOUND at errnoException (dns.js:37:11)。我不太明白这个错误。

Answer 1

如果您只需要进行 HTTP 调用，这是内置于 NodeJS 中的，您无需在 Lambda 中安装任何额外的软件包。看一下这个问题的答案:Sending http request in node.js