How can I send a simple GET to a URL and see response back in Lambda?

Question

Im trying to send a simple GET request to a URL and get the response back. I found below code that works but it only display Success but I would like to see the response. Something like this using curl:

curl -X GET http://www.some.url.com

    const http = require('http');
exports.handler = async (event, context) => {
    return new Promise((resolve, reject) => {
        const options = {
            host: 'jsonplaceholder.typicode.com',
            path: '/posts/1/',
            port: 80,
            method: 'GET'
        };
        const req = http.request(options, (res) => {
          resolve('Success');
        });
        req.on('error', (e) => {
          reject(e.message);
        });
        // send the request
        req.write('');
        req.end();
    });
};

Answer 1

For your Node.JS application, AWS Cloudwatch log the console information for Lambda function. You can use console.log() with a sample request like so

    const http = require('http');
exports.handler = async (event, context) => {
    return new Promise((resolve, reject) => {
        const options = {
            host: 'jsonplaceholder.typicode.com',
            path: '/posts/1/',
            port: 80,
            method: 'GET'
        };
        const req = http.request(options, (res) => {
          let data = '';

          // A chunk of data has been recieved.
          res.on('data', (chunk) => {
            data += chunk;
          });

          // The whole response has been received. Print out the result.
          res.on('end', () => {
            console.log(JSON.parse(data));
            });

        });
        req.write('');
        req.end();
    });
};

The output would show, for example:

Function Logs:
START RequestId: ... Version: $LATEST
2019-05-08T10:35:11.650Z    ... { userId: 1,
  id: 1,
  title: 'sunt aut facere repellat provident occaecati excepturi optio reprehenderit',
  body: 'quia et suscipit\nsuscipit recusandae consequuntur expedita et cum\nreprehenderit molestiae ut ut quas totam\nnostrum rerum est autem sunt rem eveniet architecto' }
END RequestId: ...