AWS API Gateway Header and Body Mappings in Integration Response

Question

I am trying to properly setup Body Mapping and Header Mapping in the Integration Response for an API Gateway endpoint.

In our Lambda we have

if (res         


        

Answer 1

Did you try to use Lambda Error Regex in Integration Response? For example:

.*"status":400.*

body mapping templetes:

#set ($errorMessageObj = $util.parseJson($input.path('$.errorMessage')))
{
  "status" : "$errorMessageObj.status",
  "errorType" : "$errorMessageObj.errorType",
  "message" : "$errorMessageObj.errorMessage"
}

I created an error function in my Lamda:

function error(status, errorType, errorMessage, callback){
    callback(JSON.stringify({
        status: status,
        errorType: errorType,
        errorMessage: errorMessage
    }));
}

usage:

error(404, "Not Found", "Resource is not found", callback);