Amazon Alexa Skill Lambda 代码无法执行

Question

我正在尝试为 NodeJS 中的 Amazon Alexa 技能编写 Lambda 函数。 Alexa 是可以响应您的声音的圆柱形扬声器，"skill" 基本上是它的语音应用程序。此函数从 Alexa 设备获取 JSON 输入并创建响应，然后将新的 JSON 发送回设备以供输出。

此代码应该从 BTC-e JSON 中提取比特币对美元的汇率，提取 'avg' 值，并将其输出到 Alexa 设备。

好久没写代码了，有什么愚蠢的错误请多多包涵。我使用了示例代码并尝试根据我的目的对其进行修改，但在 AWS 中执行时出现此错误：

{
  "errorMessage": "Unexpected identifier",
  "errorType": "SyntaxError",
  "stackTrace": [
    "Module._compile (module.js:439:25)",
    "Object.Module._extensions..js (module.js:474:10)",
    "Module.load (module.js:356:32)",
    "Function.Module._load (module.js:312:12)",
    "Module.require (module.js:364:17)",
    "require (module.js:380:17)"
  ]
}

我的密码是here。我感觉问题出在第 84-106 行的某处，因为那是我完成大部分工作的地方。

感谢您的帮助！

Answer 1

下面的代码应该可以工作，只需取消注释我添加的待办事项即可。您缺少几个大括号，我切换到默认包含在 AWS lambda 中的不同 http 请求库。我也改变了流程，让我更容易测试，所以现在它不会重新提示它只是告诉你最新的比特币价格。

var https = require('https');

// Route the incoming request based on type (LaunchRequest, IntentRequest,
// etc.) The JSON body of the request is provided in the event parameter.
exports.handler = function (event, context) {
    try {
        console.log("event.session.application.applicationId=" + event.session.application.applicationId);

        /**
         * Uncomment this if statement and populate with your skill's application ID to
         * prevent someone else from configuring a skill that sends requests to this function.
         */

         // TODO add this back in for your app
        // if (event.session.application.applicationId !== "amzn1.echo-sdk-ams.app.") {
        //     context.fail("Invalid Application ID");
        // }

        if (event.session.new) {
            onSessionStarted({requestId: event.request.requestId}, event.session);
        }

        if (event.request.type === "LaunchRequest") {
            onLaunch(event.request,
                     event.session,
                     function callback(sessionAttributes, speechletResponse) {
                        context.succeed(buildResponse(sessionAttributes, speechletResponse));
                     });
        }  else if (event.request.type === "IntentRequest") {
            onIntent(event.request,
                     event.session,
                     function callback(sessionAttributes, speechletResponse) {
                         context.succeed(buildResponse(sessionAttributes, speechletResponse));
                     });
        } else if (event.request.type === "SessionEndedRequest") {
            onSessionEnded(event.request, event.session);
            context.succeed();
        }
    } catch (e) {
        context.fail("Exception: " + e);
    }
};

/**
 * Called when the session starts.
 */
function onSessionStarted(sessionStartedRequest, session) {
    console.log("onSessionStarted requestId=" + sessionStartedRequest.requestId
                + ", sessionId=" + session.sessionId);
}

/**
 * Called when the user launches the skill without specifying what they want.
 */
function onLaunch(launchRequest, session, callback) {
    console.log("onLaunch requestId=" + launchRequest.requestId
                + ", sessionId=" + session.sessionId);

    // Dispatch to your skill's launch.
    getWelcomeResponse(callback);
}

/**
 * Called when the user specifies an intent for this skill.
 */
function onIntent(intentRequest, session, callback) {
    console.log("onIntent requestId=" + intentRequest.requestId
                + ", sessionId=" + session.sessionId);
    getWelcomeResponse(callback);
}

/**
 * Called when the user ends the session.
 * Is not called when the skill returns shouldEndSession=true.
 */
function onSessionEnded(sessionEndedRequest, session) {
    console.log("onSessionEnded requestId=" + sessionEndedRequest.requestId
                + ", sessionId=" + session.sessionId);
    // Add cleanup logic here
}

// --------------- Functions that control the skill's behavior -----------------------

function getWelcomeResponse(callback) {
        // If we wanted to initialize the session to have some attributes we could add those here.
    var sessionAttributes = {};
    var cardTitle = "Bitcoin Price";
    var speechOutput = "Welcome to the Bitcoin Price skill, "

    var repromptText = ''
    var shouldEndSession = true;

    var options = {
        host: 'btc-e.com',
        port: 443,
        path: '/api/2/btc_usd/ticker',
        method: 'GET'
    };

    var req = https.request(options, function(res) {
        var body = '';
        console.log('Status:', res.statusCode);
        console.log('Headers:', JSON.stringify(res.headers));
        res.setEncoding('utf8');
        res.on('data', function(chunk) {
            body += chunk;
        });
        res.on('end', function() {
            console.log('Successfully processed HTTPS response');

            body = JSON.parse(body);

                console.log(body);
                console.log('last price = ' + body.ticker.last);

                speechOutput += "The last price for bitcoin was : " + body.ticker.last;

                callback(sessionAttributes,
                 buildSpeechletResponse(cardTitle, speechOutput, repromptText, shouldEndSession));

             });
    });
    req.end();

}

// --------------- Helpers that build all of the responses -----------------------

function buildSpeechletResponse(title, output, repromptText, shouldEndSession) {
    return {
        outputSpeech: {
            type: "PlainText",
            text: output
        },
        card: {
            type: "Simple",
            title: "SessionSpeechlet - " + title,
            content: "SessionSpeechlet - " + output
        },
        reprompt: {
            outputSpeech: {
                type: "PlainText",
                text: repromptText
            }
        },
        shouldEndSession: shouldEndSession
    }
}

function buildResponse(sessionAttributes, speechletResponse) {
    return {
        version: "1.0",
        sessionAttributes: sessionAttributes,
        response: speechletResponse
    }
}

Amazon Alexa Skill Lambda 代码无法执行

Amazon Alexa Skill Lambda code won't execute

javascript

json

amazon-web-services

node.js

aws-lambda