자바 백 엔 드 크로스 도 메 인 문제 철저히 해결 (CORS) [Servlet 방식]

import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@SuppressWarnings("deprecation")
@WebServlet(asyncSupported = true)
public class CallbackServer extends HttpServlet {

   private static final long serialVersionUID = 5522372203700422672L;


   protected void doOptions(HttpServletRequest request, HttpServletResponse response) {

      response.setHeader("Access-Control-Allow-Origin", "*");
      response.setHeader("Access-Control-Allow-Credentials", "true");
      response.setHeader("Access-Control-Allow-Methods", "*");
      response.setHeader("Access-Control-Max-Age", "3600");
      response.setHeader("Access-Control-Allow-Headers", "Authorization,Origin,X-Requested-With,Content-Type,Accept,"
      + "content-Type,origin,x-requested-with,content-type,accept,authorization,token,id,X-Custom-Header,X-Cookie,Connection,User-Agent,Cookie,*");
      response.setHeader("Access-Control-Request-Headers", "Authorization,Origin, X-Requested-With,content-Type,Accept");
      response.setHeader("Access-Control-Expose-Headers", "*");
   }

   /**
    * Get  
    */
   protected void doGet(HttpServletRequest request, HttpServletResponse response)
         throws ServletException, IOException {
      

   }

   

   /**
    * Post  
    */
   protected void doPost(HttpServletRequest request, HttpServletResponse response)
         throws ServletException, IOException {
      
   }


   
}