package com.casic.missiles.filter;

import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @Description:
 * @Author: wangpeng
 * @Date: 2023/4/27 11:08
 */
//@Component
@Order(Ordered.HIGHEST_PRECEDENCE)
@WebFilter(filterName = "CORSFilter", urlPatterns = "/minio/*")
public class CORSFilter implements Filter {
    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
        HttpServletResponse response = (HttpServletResponse) res;
        HttpServletRequest request = (HttpServletRequest) req;
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("Access-Control-Allow-Headers", "*");
        if(request.getMethod().equals(HttpMethod.OPTIONS.name())){
            response.setStatus(HttpStatus.NO_CONTENT.value());
        }else{
            chain.doFilter(req, res);
        }
    }

    @Override
    public void init(FilterConfig filterConfig) {}

    @Override
    public void destroy() {}
}
