aws-gateway-cors-frontend

AWS API Gateway Usage Example

The CORS example consists of a backend and a frontend service in order to showcase com.jrestless.core.filter.cors.CorsFilter and so CORS requests.

Installation & Deployment

git clone https://github.com/bbilger/jrestless-examples.git
cd jrestless-examples
./gradlew build
cd aws/gateway/aws-gateway-cors-frontend
serverless deploy
cd ../aws-gateway-cors-backend
serverless deploy

Make a note of the frontend and backend endpoints.

Usage

For this example, we assume the following endpoints:

Service Information
service: aws-gateway-cors-frontend-service
stage: dev
region: eu-central-1
api keys:
  None
endpoints:
  ANY - https://...ng.execute-api.eu-central-1.amazonaws.com/dev/

Service Information
service: aws-gateway-cors-backend-service
stage: dev
region: eu-central-1
api keys:
  None
endpoints:
  ANY - https://...4b.execute-api.eu-central-1.amazonaws.com/dev/api
  ANY - https://...4b.execute-api.eu-central-1.amazonaws.com/dev/ui

Open the frontend's form at https://...ng.execute-api.eu-central-1.amazonaws.com/dev/ and enter the backend URL https://...4b.execute-api.eu-central-1.amazonaws.com/dev/api. The CORS filter registered in the backend will allow all methods but "PATCH" from any origin.

The backend comes with the same form in order to show that same origin requests bypass the CORS filter.

Backend Endpoints

Endpoints	Method	Consumes	Produces	Comment
/api	GET,POST,PUT,DELETE,OPTIONS,PATCH	-	text	the CORS filter allows Ajax requests for all methods but PATCH from any origin
/ui	GET	-	HTML	the backend comes with the same form in order to showcase that the CORS filter is bypassed for same origin requests

Frontend Endpoints

Endpoints	Method	Consumes	Produces	Comment
/	GET	-	HTML	form to perform Ajax requests to the backend