[Spring] Cross Origin Resource Sharing (CORS) 해결

출처 : http://misoin.tistory.com/50

참고 : http://devtrans.tistory.com/entry/CORS-support-in-Spring-Framework

참고: https://gist.github.com/kdonald/2232095

스프링에서 CORS 문제를 해결하기 위해 해당 Class를 하나 작성한다.

package com.xxxx.core.filter;

import java.io.IOException;

import javax.servlet.FilterChain;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.web.filter.OncePerRequestFilter;

public class CorsFilter extends OncePerRequestFilter {

    @Override

    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)

            throws ServletException, IOException {

        response.addHeader("Access-Control-Allow-Origin", "*");

        if (request.getHeader("Access-Control-Request-Method") != null && "OPTIONS".equals(request.getMethod())); {

            // CORS "pre-flight" request

            response.addHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE");

            response.addHeader("Access-Control-Allow-Headers", "Authorization");

            response.addHeader("Access-Control-Max-Age", "1728000");

        }

        filterChain.doFilter(request, response);

    }

}

web.xml 에 아래 필터 추가

    <!-- CORS -->

    <filter>

        <filter-name>cors</filter-name>

        <filter-class>com.xxxx.core.filter.CorsFilter</filter-class>

    </filter>

    <filter-mapping>

        <filter-name>cors</filter-name>

        <url-pattern>/*</url-pattern>

    </filter-mapping>