AWS Api Gateway mock integration response header mapping, how?

Question

I was digging web and kept trying to find what I am missing in the following situation: The basic problem I am trying to solve is: when http://example.com/login?target=http://google.com is called, the user is redirected to an OAuth login page with the state referring to the url in the target query param.

So: http://example.com/login?target=http://google.com would be redirected to http://authenticator.com/login?type=...&redirect_uri=...&client_id=...&state=http://google.com

I could do this with Lambda, but I felt it is unnecessary and API Gateway could be used solely.

First I created the /login resource and a GET method, to which I added a mock integration.

I set 302 at Method Response:

Finally I added Integration Response:

However when I test the method, the Location header is missing. If I put a static string to the Location header in Integration Response it works, but whatever I try at the header mapping it is not working.

Things I tried at Integration Request mapping:

{
  "statusCode": 200,
  "headers": {"target": "https://google.com"}
}

{
  "statusCode": 200,
  "target": "https://google.com"
}

I seems that integration.response.body.target or integration.response.header.target is always empty. According to the documentation, headers property can be part of the integration response, but I cannot get any value from the Mapping Template I set at Integration Request.

Any idea what I did incorrectly?

Hi. Did you find a way to map response body with header.I face the same issue it comes with empty space — Jennings
@Jennings I spent a few more hours on this one at the end of December, but I have not checked it since then. Finally I ended up creating a Lambda function which does the same thing. — Senki1988

DC- DC- · Accepted Answer · 2020-07-16T18:41:48

You can do a response override, eg: in your integration request

#set($urlProxy = $method.request.path.proxy)
{
    "statusCode": 301,
}
#set($context.responseOverride.header.location = "https://www.foo.bar.com/$urlProxy")

This will override your response header location

AWS Api Gateway mock integration response header mapping, how?

2 Answers