AWS API Gateway Wildcard Path

In API Gateway configuration, typically one specifies an complete API Path, such as /api/v1/fruits/list. Sometimes, it may be necessary to specify a wildcard path that includes multiple complete API paths. This is how you can do it.

1. Use curly brackets. Specify /api/v1/fruits/{action} to allow any action to be accepted. Action can be any valid URL path segment, but it only covers one depth. It does not cover deeper URL like api/v1/fruits/list/all.
2. To cover all sub-links, use {proxy+}. The + sign tells API Gateway to accept all sub-links.
3. Note that you need a separate API for the root path itself, in this case /api/v1/fruits needs its own API. It’s possible to use /api/v1/fruits/{action?} to cover the root path. Needs to be verified since it’s not in the documentation.
4. In GoLang, the wildcard value is passed to the Lambda handler in a string-to-string map named PathParameters. PathParameters:map[string]string{"id":"234"}

See more at https://aws.amazon.com/blogs/aws/api-gateway-update-new-features-simplify-api-development/