Spring Security登入过滤器

2023-03-06 21:44:25 by 极墨笔记 in SpringBoot

自定义Spring Security登入过滤器

完成Spring Security用户认证流程图http://www.zeromemos.com/index/article/read.html?id=367中的1-4步骤，以及认证成功：步骤8-9和失败的返回

package com.atguigu.security.fillter;

import com.atguigu.common.jwt.JwtHelper;
import com.atguigu.common.result.ResponseUtil;
import com.atguigu.common.result.Result;
import com.atguigu.common.result.ResultCodeEnum;
import com.atguigu.security.custom.CustomUser;
import com.atguigu.vo.system.LoginVo;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.web.util.matcher.AntPathRequestMatcher;

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

public class TokenLoginFilter extends UsernamePasswordAuthenticationFilter {

    //构造方法
    public TokenLoginFilter(AuthenticationManager authenticationManager) {
        this.setAuthenticationManager(authenticationManager);
        //提交方式可以不仅仅是Post
        this.setPostOnly(false);
        //指定登录接口及提交方式，可以指定任意路径
        this.setRequiresAuthenticationRequestMatcher(new AntPathRequestMatcher("/admin/system/index/login","POST"));
    }

    /**
     * 获取用户提交的用户名和密码进行登录认证
     * @param req
     * @param res
     * @return
     * @throws AuthenticationException
     */
    @Override
    public Authentication attemptAuthentication(HttpServletRequest req, HttpServletResponse res)
            throws AuthenticationException {
        try {

            //用流的方式从请求里得到LoginVo登入对象
            LoginVo loginVo = new ObjectMapper().readValue(req.getInputStream(), LoginVo.class);

            //将用户名和密码封装成Authentication对象
            Authentication authenticationToken = new UsernamePasswordAuthenticationToken(loginVo.getUsername(), loginVo.getPassword());

            //调用authenticate()进行认证
            return this.getAuthenticationManager().authenticate(authenticationToken);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }

    }

    /**
     * 登录成功返回token
     * @param request
     * @param response
     * @param chain
     * @param auth
     * @throws IOException
     * @throws ServletException
     */
    @Override
    protected void successfulAuthentication(HttpServletRequest request, HttpServletResponse response, FilterChain chain,
                                            Authentication auth) throws IOException, ServletException {
        //得到当前用户对象
        CustomUser customUser = (CustomUser) auth.getPrincipal();

        //传入ID和用户名生成token
        String token = JwtHelper.createToken(customUser.getSysUser().getId(), customUser.getSysUser().getUsername());

        Map<String, Object> map = new HashMap<>();
        map.put("token", token);
        ResponseUtil.out(response, Result.ok(map));
    }

    /**
     * 登录失败
     * @param request
     * @param response
     * @param e
     * @throws IOException
     * @throws ServletException
     */
    @Override
    protected void unsuccessfulAuthentication(HttpServletRequest request, HttpServletResponse response,
                                              AuthenticationException e) throws IOException, ServletException {

        if(e.getCause() instanceof RuntimeException) {
            ResponseUtil.out(response, Result.build(null, 204, e.getMessage()));
        } else {
            ResponseUtil.out(response, Result.build(null, ResultCodeEnum.LOGIN_ERROR));
        }
    }
}