AWS API Gateway No 'Access-Control-Allow-Origin' header is present

Question

I\'m stuck on an issue with API gateway and I\'ve gone through all the other SO answers on this, AWS forums and have been through their docs but still no joy.

I am t

Answer 1

In case you want to change only one header instead of replacing all headers as is shown in Words Like Jared answer. You can use this code:

'use strict';

module.exports.handler = (event, context, callback) => {
  const response = event.Records[0].cf.response;
  const headers = response.headers;

  headers['access-control-allow-origin'] = [{ key: 'Access-Control-Allow-Origin', value: "*" }];

  return callback(null, response);
};

Another examples can be found on Adding HTTP Security Headers Using Lambda@Edge and Amazon CloudFront. It works same for normal Lambda function.