enable cors (standard ee)

Simply create the filter:

import java.io.IOException;
 import javax.ws.rs.container.ContainerRequestContext;
 import javax.ws.rs.container.ContainerResponseContext;
 import javax.ws.rs.container.ContainerResponseFilter;
 import javax.ws.rs.ext.Provider;
 @Provider
 public class RestResponseFilter implements ContainerResponseFilter{
 @Override
     public void filter(ContainerRequestContext requestContext, ContainerResponseContext responseContext) throws IOException{
         responseContext.getHeaders().putSingle("Access-Control-Allow-Origin", "*");
         responseContext.getHeaders().putSingle("Access-Control-Allow-Credentials", "true");
         responseContext.getHeaders().putSingle("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT");
         responseContext.getHeaders().putSingle("Access-Control-Allow-Headers", "Content-Type, Accept");
     }
 }

References

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