CORS Implementation

CorsComposition.java

package actions;

import java.lang.annotation.*;
import play.libs.F.Promise;
import play.mvc.*;
import play.mvc.Http.Context;
import play.mvc.Http.*;

public class CorsComposition {

    /**
     * Wraps the annotated action in an <code>CorsAction</code>.
     */
    @With(CorsAction.class)
    @Target({ ElementType.TYPE, ElementType.METHOD })
    @Retention(RetentionPolicy.RUNTIME)
    public @interface Cors {
        String value() default "*";
    }

    public static class CorsAction extends Action<Cors> {

		@Override
		public Promise<SimpleResult> call(Context context) throws Throwable {
			Response response = context.response();
		    response.setHeader("Access-Control-Allow-Origin", "*");

		    //Handle preflight requests
		    if(context.request().method().equals("OPTIONS")) {
		        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE");
		        response.setHeader("Access-Control-Max-Age", "3600");
		        response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Authorization, X-Auth-Token");
		        response.setHeader("Access-Control-Allow-Credentials", "true");

		        return delegate.call(context);
		    }

		    response.setHeader("Access-Control-Allow-Headers","X-Requested-With, Content-Type, X-Auth-Token");
		    return delegate.call(context);
		}
		
    }
}