Question

我正在为新的亚马逊ECHO工作“技能”。该技能将允许用户向Alexa询问有关Enphase太阳系的状态和性能的信息。 Alexa将回应从基于JSON的Enphase API中提取的结果。例如，用户可以询问，

 "Alexa.  Ask Enphase how much solar energy I have produced in the last week."
 ALEXA <"Your array has produced 152kWh in the last week.">

问题是我用JavaScript编程已经多年了，这是我第一次使用AWS Lambda。我没有非常成功地找到有关如何将JSON查询嵌入AWS Lambda函数中的第三方服务器的任何信息。以下是我的Lambda函数中相关的代码部分：

 /**
  * Gets power from Enphase API and prepares speach
  */
 function GetPowerFromEnphase(intent, session, callback) {
      var Power = 0;
      var repromptText = null;
      var sessionAttributes = {};
      var shouldEndSession = false;
      var speechOutput = "";

      //////////////////////////////////////////////////////////////////////
      // Need code here for sending JSON query to Enphase server to get power
      // Request:
      // https://api.enphaseenergy.com/api/v2/systems/67/summary
      // key=5e01e16f7134519e70e02c80ef61b692&user_id=4d7a45774e6a41320a
      // Response:
      // HTTP/1.1 200 OK
      // Content-Type: application/json; charset=utf-8
      // Status: 200
      // {"system_id":67,"modules":35,"size_w":6270,"current_power":271,
      // "energy_today":30030,"energy_lifetime":59847036,
      // "summary_date":"2015-03 04","source":"microinverters",
      // "status":"normal","operational_at":1201362300,
      // "last_report_at":1425517225}
      //////////////////////////////////////////////////////////////////////

      speechOutput = "Your array is producing " + Power + " kW, goodbye";
      shouldEndSession = true;

      // Setting repromptText to null signifies that we do not want to reprompt the user.
      // If the user does not respond or says something that is not understood, the session
      // will end.
      callback(sessionAttributes,
         buildSpeechletResponse(intent.name, speechOutput, repromptText,
         shouldEndSession));
 }

非常感谢一些指导。即使有人能指出我正确的方向。谢谢！

Answer 1

Request是一个非常受欢迎的库，用于处理node.js中的http请求。以下是使用您的数据的POST示例：

var request = require('request');

request({
  url: 'https://api.enphaseenergy.com/api/v2/systems/67/summary',
  method: 'POST',
  headers: {
    Accept: 'application/json',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    key: '5e01e16f7134519e70e02c80ef61b692',
    user_id: '4d7a45774e6a41320a'
  })
}, function (error, response, body) {
  if (!error && response.statusCode == 200) {
    console.log('BODY: ', body);
    var jsonResponse = JSON.parse(body); // turn response into JSON

    // do stuff with the response and pass it to the callback...

    callback(sessionAttributes, 
        buildSpeechletResponse(intent.name, speechOutput, repromptText,
        shouldEndSession));
  }
});

我没有ECHO / Alexa的例子，但这里有Lambda calling out to get weather data to send it to Slack的例子

如何从AWS Lambda函数查询第三方JSON API

1 个答案: