配置Security登录授权过滤器

配置Security登录授权过滤器

代码如下

package com.wxit.server.config.security;

import com.wxit.server.pojo.Admin;
import com.wxit.server.service.IAdminService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

/**
 * @Author wj
 * Security配置类
 **/
@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private IAdminService adminService;

    @Autowired
    private RestAuthorizationEntryPoint restAuthorizationEntryPoint;

    @Autowired
    private RestfulAccessDeniedHandler restfulAccessDeniedHandler;

    /**
     * 根据用户名获取用户的方法
     * @return
     * WebSecurityConfigurerAdapter 中已经存在了 UserDetailsService，所以要重写 UserDetailsService
     */
    @Override
    @Bean
    public UserDetailsService userDetailsService(){
        return username -> {
            Admin admin = adminService.getAdminByUserName(username);
            if (admin != null){
                return admin;
            }
            return null;
        };
    }

    /**
     * 走登录逻辑的时候走自己实现的UserDetailsService
     * @param auth
     * @throws Exception
     */
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService()).passwordEncoder(passwordEncoder());
    }

    @Bean
    public PasswordEncoder passwordEncoder(){
        return new BCryptPasswordEncoder();
    }

    @Bean
    public JwtAuthencationTokenFilter jwtAuthencationTokenFilter(){
        return new JwtAuthencationTokenFilter();
    }

    /**
     * spring Security 完整的配置
     * @param http
     * @throws Exception
     */
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        //使用jwt 不需要csrf
        http.csrf()
                .disable()
                //基于token 不需要session
                .sessionManagement()
                .sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()
                .authorizeRequests()
                //允许登录访问
                .antMatchers("/login","/logout")
                .permitAll()
                //除了上面都需要请求验证
                .anyRequest()
                .authenticated()
                .and()
                //禁用缓存
                .headers()
                .cacheControl();

        //添加jwt登录授权过滤器
        http.addFilterBefore(jwtAuthencationTokenFilter(), UsernamePasswordAuthenticationFilter.class);

        //添加自定义未授权和未登录结果返回
        http.exceptionHandling()
                .accessDeniedHandler(restfulAccessDeniedHandler)
                .authenticationEntryPoint(restAuthorizationEntryPoint);
    }
}

package com.wxit.server.config.security;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.web.authentication.WebAuthenticationDetailsSource;
import org.springframework.web.filter.OncePerRequestFilter;

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

/**
 * @Author wj
 * JWT登录授权过滤器
 **/
public class JwtAuthencationTokenFilter extends OncePerRequestFilter {

    @Value("${jwt.tokenHeader}")
    private String tokenHeader;

    @Value("${jwt.tokenHead}")
    private String tokenHead;

    @Autowired
    private JwtTokenUtil jwtTokenUtil;

    @Autowired
    private UserDetailsService userDetailsService;

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
        //拿到头部
        String authHeader = request.getHeader(tokenHeader);
        //存在token
        if (authHeader != null && authHeader.startsWith(tokenHead)){
            //字符串的截取
            String authToken = authHeader.substring(tokenHead.length());
            String username = jwtTokenUtil.getUserNameFromToken(authToken);
            //SecurityContextHolder.getContext().getAuthentication() == null 没登录，拿不到上下文对象，token存在用户名，但是未登录
            if (username != null && SecurityContextHolder.getContext().getAuthentication() == null){
                //登录
                UserDetails userDetails = userDetailsService.loadUserByUsername(username);
                //判断token是否有效,重新设置到用户对象
                if (jwtTokenUtil.validateToken(tokenHead,userDetails)){
                    UsernamePasswordAuthenticationToken authenticationToken = new
                            UsernamePasswordAuthenticationToken(userDetails,null,userDetails.getAuthorities());
                    authenticationToken.setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
                    SecurityContextHolder.getContext().setAuthentication(authenticationToken);
                }
            }
        }
        filterChain.doFilter(request,response);
    }
}

package com.wxit.server.config.security;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.wxit.server.common.RespBean;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.AuthenticationEntryPoint;
import org.springframework.stereotype.Component;

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

/**
 * @Author wj
 * 当未登录或者token失效时访问该接口，自定义的返回结果
 **/
@Component
public class RestAuthorizationEntryPoint implements AuthenticationEntryPoint {

    @Override
    public void commence(HttpServletRequest request, HttpServletResponse response, AuthenticationException e) throws IOException, ServletException {
        response.setCharacterEncoding("UTF-8");
        response.setContentType("application/json");
        PrintWriter out = response.getWriter();
        RespBean bean = RespBean.error("权限不足，请联系管理员");
        bean.setCode(401);
        out.write(new ObjectMapper().writeValueAsString(bean));
        out.flush();
        out.close();
    }
}

package com.wxit.server.config.security;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.wxit.server.common.RespBean;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.web.access.AccessDeniedHandler;
import org.springframework.stereotype.Component;

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

/**
 * @Author wj
 **/
@Component
public class RestfulAccessDeniedHandler implements AccessDeniedHandler {

    @Override
    public void handle(HttpServletRequest request, HttpServletResponse response, AccessDeniedException e) throws IOException, ServletException {
        response.setCharacterEncoding("UTF-8");
        response.setContentType("application/json");
        PrintWriter out = response.getWriter();
        RespBean bean = RespBean.error("权限不足，请联系管理员");
        bean.setCode(501);
        out.write(new ObjectMapper().writeValueAsString(bean));
    }
}