Alexa 技能，可以使用 AWS Lambda、Node.js 和 Alexa Skills Kit 阅读 Facebook 帖子

Question

我正在使用 AWS Lambda、Node.js 和 Alexa Skills Kit 开发 Alexa 技能。我正在使用来自 Skill-sample-nodejs-fact 项目的分支并成功部署并测试了示例事实项目。现在我正在尝试修改该代码以阅读某些 Facebook 提要上的帖子。首先我尝试开发一些可以阅读帖子的节点应用程序并且它是成功的。请找到以下代码供您参考。我使用了 fb 模块 - https://www.npmjs.com/package/fb

const FB = require('fb');
FB.setAccessToken('abc');
const query='cnninternational/posts';

FB.api(query, function (res) {
  if(!res || res.error) {
   console.log(!res ? 'error occurred' : res.error);
   return;
  }
  console.log(res);
});

接下来，我尝试将上面的代码块集成到 lambda 函数中。不幸的是，我无法使用这些代码阅读 Facebook 帖子。请在下面的面板中找到这些代码块。另外，我还检查了 cloudwatch 日志。我可以看到“GetNewsIntent”，但在日志中没有看到“fb-init”、“fb-error”或“fb-exit”条目。令人惊讶的是，日志中也没有错误。如果有人可以帮助解决这个问题。

'use strict';
const Alexa = require('alexa-sdk');
const FB = require('fb');
const APP_ID = 'abc';

const SKILL_NAME = 'test';
const GET_FACT_MESSAGE = "Here's your news: ";
const STOP_MESSAGE = 'Goodbye!';


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

const handlers = {
    'LaunchRequest': function () {
        this.emit('GetNewsIntent');
    },
    'GetNewsIntent': function () {

        console.log('GetNewsIntent');
        const speechOutput = GET_FACT_MESSAGE;
        const query='cnninternational/posts';
        FB.setAccessToken('abc');
        FB.api(query, function (res) {
          console.log('fb-init');
          if(!res || res.error) {
           console.log(!res ? 'error occurred' : res.error);
           console.log('fb-error');
           return;
          }
          console.log(res);
          speechOutput = speechOutput + res;
          console.log('fb-exit');
        });

        this.response.cardRenderer(SKILL_NAME, speechOutput);
        this.response.speak(speechOutput);
        this.emit(':responseReady');
    },
    'AMAZON.StopIntent': function () {
        this.response.speak(STOP_MESSAGE);
        this.emit(':responseReady');
    },
};

Answer 1

你实现account linking了吗？您应该使用event.session.user.accessToken 作为setAccessToken() 的参数。

Answer 2

我已经删除了 this.response.cardRenderer ， this.response.speak 并更改了代码位。它现在工作正常。请找到下面的代码 sn-p 可用于阅读 BBC Facebook 页面上的帖子。

var accessToken = '';

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

const handlers = {
    'NewSession': function() {
        var welcomeMessage = "Welcome to Athena";
        welcomeMessage = welcomeMessage +"<break time=\"1s\"/>"+ "<audio src='https://s3.amazonaws.com/my-ssml-samples/Flourish.mp3' />"+"<break time=\"1s\"/>";  
        welcomeMessage += HELP_MESSAGE;
        accessToken = this.event.session.user.accessToken;
        if (accessToken) {
            FB.setAccessToken(accessToken);
            this.emit(':ask', welcomeMessage, HELP_REPROMPT);
        }
        else {
            // If we don't have an access token, we close down the skill. 
            this.emit(':tellWithLinkAccountCard', "This skill requires you to link a Facebook account. Seems like you are not linked to a Facebook Account. Please link a valid Facebook account and try again.");
        }
    },
    'LaunchRequest': function () {
        this.emit('NewSession');
    },
    'ReadBbcNewsFacebookPostsIntent': function () {        
        var alexa = this;
        FB.api("bbcnews/posts", function (response) {
            if (response && !response.error) {
                if (response.data) {
                    var output = "Here are recent posts" + "<break time=\"1s\"/>";
                    var max = 5;
                    for (var i = 0; i < response.data.length; i++) {
                        if (i < max) {
                            output += "<break time=\"1s\"/>" + "Post " + 
                             (i + 1) + 
                            response.data[i].message.replace(/(?:https?|ftp):\/\/[\n\S]+/g, '')
                              + ". ";
                        }
                    }
                    alexa.emit(':ask', output+ ", What would you like to do next?",HELP_MESSAGE);
                } else {
                    // REPORT PROBLEM WITH PARSING DATA
                }
            } else {
                // Handle errors here.
                console.log(response.error);
                this.emit(':tell', EMPTY_ACCESS_TOKEN_MESSAGE, TRY_AGAIN_MESSAGE);
            }
        });
    }
};