CORS with API Gateway HTTP

Question

On  API Gateway REST it's posible to handle the OPTIONS with mock responses.
AWS Amplify deploy the API using it.

But how do the same on  API Gateway HTTP?

I'm reading this document.
https://docs.aws.amazon.com/apigateway/latest/developerguide/http-api-cors.html

And works fine for the POST and GET routes that I need to implement on lambda, but ¿I need to configure a dummy lambda over OPTIONS just to support CORS?

Answer

Yes, you need to configure a dummy lambda over OPTIONS just to support CORS when using API Gateway HTTP. This is because API Gateway HTTP **does not automatically handle OPTIONS ** requests, so you need to create a mock integration that returns the appropriate CORS headers.

Answer

Why API Gateway HTTP does not handle preflight OPTIONS CORS error. It is a bug from there side.

Please provide a documented solution other wise so that we can get rid of this issue.

(Api is working from POSTMAN and other similar kind of clients tool but not working when trying to access from any java script based application like react js etc...)

With the below code, it should add some header functionality so that it can handle the CORS error.
``

Thanks.
```
import json

def lambda_handler(event, context):
    response = {
        "isAuthorized": False,
        "context": {
            "stringKey": "value",
            "numberKey": 1,
            "booleanKey": True,
            "arrayKey": ["value1", "value2"],
            "mapKey": {"value1": "value2"}
        }
    }

try:
        if (event["headers"]["authorization"] == "secretToken"):
            response = {
                "isAuthorized": True,
                "context": {
                    "stringKey": "value",
                    "numberKey": 1,
                    "booleanKey": True,
                    "arrayKey": ["value1", "value2"],
                    "mapKey": {"value1": "value2"}
                }
            }
            print('allowed')
            return response
        else:
            print('denied')
            return response
    except BaseException:
        print('denied')
        return response
```

CORS with API Gateway HTTP

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