package cn.lili.security;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
import org.springframework.web.filter.OncePerRequestFilter;
import org.springframework.web.util.ContentCachingRequestWrapper;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * lmk-shop-java
 *
 * @author : zxl
 * @date : 2025-11-20 13:35
 **/
@Component
@Order(Ordered.HIGHEST_PRECEDENCE)
public class GlobalRequestCachingFilter extends OncePerRequestFilter {

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
            throws ServletException, IOException {
        // 包装所有请求，支持重复读取请求体
        ContentCachingRequestWrapper wrappedRequest = new ContentCachingRequestWrapper(request);
        // 统一设置UTF-8编码，避免表情乱码
        response.setCharacterEncoding("UTF-8");
        response.setContentType("application/json;charset=UTF-8");

        filterChain.doFilter(wrappedRequest, response);
    }
}