Advanced Options

serverless-http takes a second argument, options, which can contain:

requestId: the header in which to place the AWS Request ID, defaults to x-request-id and can be disabled with false
request: a transform for the request, before it is sent to the app
response: a transform for the response, before it is returned to Lambda

A transform is either a function (req|res, event, context) or an Object to be assigned.

Here is an example:

module.exports.handler = serverless(app, {
  requestId: 'X-ReqId',
  request: {
    key: 'value'
  },
  response: function(res) {
    return Promise.resolve()
      .then(() => {
        res.foo = 'bar';
      });
  }
})