title: API Gateway Redirect 302
body: <p>I've got a service I'm proxying with gateway. A GET request to / will return a 302 with a Location header. The problem is the value of the Location header which I'm referencing in "integration.response.header.Location" is /login. </p>
  
  <p>What this ends up doing is breaking my proxy by removing the stageName from the AWS provided URL for the API.</p>
  
  <p>Instead of "{AWS_URL}/local/login", the redirect is going to "{AWS_URL}/login" which causes a 403 Forbidden from API Gateway.</p>
  
  <p>If I manually modify the header mapping expression to use 'local/login' all works fine, but, the above should work, no?</p>
  
  <p>Is there some hackery to maybe concat values into a header mapping expression?</p>
  
  <p>Any help is greatly appreciated!
  Thanks!</p>