Lambda http get using aws-sdk

index.js

'use strict';
const AWS = require('aws-sdk');

// define our target API as a "service"
const svc = new AWS.Service({

    // the API base URL
    endpoint: 'https://www.metaweather.com/api',

    // don't parse API responses
    // (this is optional if you want to define shapes of all your endpoint responses)
    convertResponseTypes: false,

    // and now, our API endpoints
    apiConfig: {
        metadata: {
            protocol: 'rest-json' // we assume our API is JSON-based
        },
        operations: {
            getWeather: {
                http: {
                    method: 'GET',
                    // note the placeholder in the URI
                    // requestUri: '/accounts/{accountId}'
                    requestUri: '/location/{locationId}/'
                },
                input: {
                    type: 'structure',
                    required: [ 'locationId' ],
                    members: {
                        'locationId': {
                            // all kinds of validators are available
                            type: 'integer',
                            // include it in the call URI
                            location: 'uri',
                            // this is the name of the placeholder in the URI
                            locationName: 'locationId'
                        }
                    }
                }
            }
        }
    }
});

svc.isGlobalEndpoint = true;

exports.handler = async (event, context) => {
    return new Promise((resolve, reject) => {

        svc.getWeather({
            locationId: event.locationId
        }, (err, data) => {
    
            if (err) {
                // console.error('>>> operation error:', err);
                const result = {
                    "statusCode": err.statusCode,
                    "message": err.message,
                    "code": err.code,
                };
                reject(JSON.stringify(result));
            }
    
            resolve(data);
        });
    });
};