open-JSD-10117/src/main/java/com/fr/plugin/oauth/LogoutFilter.java

package com.fr.plugin.oauth;

import com.fr.decision.fun.impl.AbstractGlobalRequestFilterProvider;
import com.fr.plugin.oauth.utils.CookieUtils;
import com.fr.plugin.oauth.utils.GZipUtil;
import com.fr.plugin.oauth.utils.ResponseWrapper;

import javax.servlet.FilterChain;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import static javax.servlet.http.HttpServletResponse.SC_OK;

public class LogoutFilter  extends AbstractGlobalRequestFilterProvider {
    @Override
    public String filterName() {
        return "logoutFilter";
    }

    @Override
    public String[] urlPatterns() {
        return new String[]{
                "/decision/logout"
        };
    }

    @Override
    public void doFilter(HttpServletRequest req, HttpServletResponse res, FilterChain filterChain) {
        try {
            ResponseWrapper responseWrapper = new ResponseWrapper(res);
            filterChain.doFilter(req, responseWrapper);

            //String newContent = null;
            String newContent = "{\"data\":\"https://xx/\"}";
   
            byte[] content = responseWrapper.getContent();
            if (content.length > 0 && res.getStatus() == SC_OK) {
                String header = res.getHeader("Content-Encoding");
                boolean isGzip = "gzip".equalsIgnoreCase(header);
                if (isGzip) {
                    content = GZipUtil.decompress(content);
                }

              
                byte[] result = null;

                if (isGzip) {
                    result = GZipUtil.compress(newContent.getBytes("UTF-8"));
                    res.setHeader("Content-Encoding", "gzip");
                } else {
                    result = newContent.getBytes("UTF-8");
                }
                //把返回值输出到客户端
                res.setContentLength(-1);
                res.setContentType("text/html;charset=UTF-8");
                ServletOutputStream out = res.getOutputStream();
                out.write(result);
                out.flush();
                out.close();
                res.flushBuffer();
            }
            Cookie cookie = CookieUtils.getLoginPathCookie(req);
            CookieUtils.deleteCookie(res, cookie);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}