AWS API 网关：CORS 和空事件 Object

Question

I have been struggling with setting up AWS API Gateway to pass Query string parameters to my Lambda function.

If I set to API to use Lambda proxy integration, I get a CORS error at the Web client

[index.html:1 Access to XMLHttpRequest at 'https://g2kza1o79f.execute-api.eu-west-2.amazonaws.com/prod/gettest8' from origin 'null' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.]

( - even when I have set the API with CORS enabled.

If I set the API to not use Lambda proxy integration, and CORS enabled, the API call works (no CORS error), but the event object received in my Lambda function is empty( hence no query string parameters). In both cases I am using the GET method. I can see in the Method Response Header the Access-Control-Allow-Origin option is present, but cannot access the Integration Response

Question : How can I set-up my API to pass query string parameters through to my Lambda function without getting the CORS error? I will also be wanting to set up APIs for POST requests to other Lambda functions.

Answer 1

I believe it is related to First Enable CORS Then Deploy API.

A good thread could be found here. API Gateway CORS: no 'Access-Control-Allow-Origin' header