Return data using an https call with nodejs in a lambda function

Question

I am trying to set up an HTTPS call inside my lambda function. I have gone through a number of tutorials but I obviously don't understand it well enough.

I am just using a basic example to a chuck norris jokes API.

// Load the AWS SDK for Node.js
let AWS = require('aws-sdk');
// Set the region 
AWS.config.update({region: 'us-east-2'});

const https = require('https');

let url = "https://api.chucknorris.io/jokes/random"

exports.handler = async (event, context, callback) => {


    function httpsCall() {
        
        return new Promise((resolve, reject) => {
            const options = {
                host: 'api.chucknorris.io',
                path: '/jokes/random',
                port: 443,
                method: 'GET'
            };
    
            const req = https.request(options, (res) => {
              resolve('Success');
            });
    
            req.on('error', (e) => {
              reject(e.message);
            });
    
            // send the request
            req.write('');
            req.end();
        });
    }
    
    console.log(await httpsCall())
    // httpsCall().then(resp => resp.json()).then(data => console.log(data))

};

Best I can get is for it to return "Success" Using the .then() chaining doesn't produce any results, neither does trying to work with the "res" return in the reslove function.

I have no idea what else to try...

Any suggestions?

Arun Kamalanathan · Accepted Answer · 2019-12-02 09:18:49Z

1

you can use response.end event to resolve the promise.

// Load the AWS SDK for Node.js
let AWS = require('aws-sdk');
// Set the region 
AWS.config.update({ region: 'us-east-2' });

const https = require('https');

let url = "https://api.chucknorris.io/jokes/random"

exports.handler = async (event, context, callback) => {


  async function httpsCall() {

    return new Promise((resolve, reject) => {
      const options = {
        host: 'api.chucknorris.io',
        path: '/jokes/random',
        port: 443,
        method: 'GET'
      };

      const req = https.request(options, (res) => {

        var body = '';

        res.on('data', function (chunk) {
          body += chunk;
        })

        res.on('end', () => {
          resolve(JSON.parse(body));
        })
      });

      req.on('error', (e) => {
        reject(e.message);
      });

      // send the request
      req.write('');
      req.end();
    });
  }
  console.log(await httpsCall())
  // httpsCall().then(resp => resp.json()).then(data => console.log(data))
};

edited Dec 2, 2019 at 9:18

answered Dec 2, 2019 at 9:08

Arun Kamalanathan

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1 Comment

Arun Kamalanathan Over a year ago

if you see my answer, i have removed the word "Sucess" from the code

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