How to get AWS API Gateway invoke URL in an AWS Lambda function?

Question

I'm using the proxy integration with my Java lambda function. The input for the lambda handler is a JSON object that represents an incoming request. It has a body, headers, query params and so on. But it doesn't include the source URL that is parsed by the API Gateway for the body, query params and etc. Is there a way to get it?

The thing is API Gateway doesn't support arrays in query parameters. Example: /endpoint?numbers=1&numbers=2. Seems, the only way to pass an array is to pass it as a JSON array string /endpoint?numbers=[1,2] but it is not always suitable. So I want to parse the URL by myself.

Answer 1

Unfortunately, API Gateway doesn't provide you with the full URL for you to parse yourself.

If you have the option of using the POST method to /endpoint, you might consider sending a request body instead of query string parameters.

Answer 2

The 'path' field inside the 'requestContext' field contains the path of API gateway resource. See docs for more details.