How can I retrieve a user's public IP address via Amazon API Gateway + Lambda (node)

Question

I\'m currently writing a Node.js lambda function, in which I want to log the incoming requester\'s public IP address. I\'ve been looking through both the API Gateway and Lam

Answer 1

Here is a simple demonstration of using API Gateway's $context.identity.sourceIp in a Lambda function.

API Mapping template:

{
    "sourceIP" : "$context.identity.sourceIp"
}

Lambda function:

'use strict';
console.log('Loading function');
exports.handler = (event, context, callback) => {
    console.log('SourceIP =', event.identity.sourceIP);
    callback(null, event.identity.sourceIP);
};