我们系统中的认证场景通常比较复杂，比如说用户被锁定无法登录，限制登录IP等。而SpringSecuriy最基本的是基于用户与密码的形式进行认证，由此可知它的一套验证规范根本无法满足业务需要，因此扩展势在必行。那么我们可以考虑自己定义filter添加至SpringSecurity的过滤器栈当中，来实现我们自己的验证需要。
本例中，基于前篇的数据库的Student表来模拟一个简单的例子：当Student的jointime在当天之后，那么才允许登录
一、创建自己定义的Filter
我们先在web包下创建好几个包并定义如下几个类
CustomerAuthFilter:
package com.bdqn.lyrk.security.study.web.filter;
import com.bdqn.lyrk.security.study.web.authentication.UserJoinTimeAuthentication;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter;
import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class CustomerAuthFilter extends AbstractAuthenticationProcessingFilter {
private AuthenticationManager authenticationManager;
public CustomerAuthFilter(AuthenticationManager authenticationManager) {
super(new AntPathRequestMatcher("/login", "POST"));
this.authenticationManager = authenticationManager;
}
@Override
public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException, IOException, ServletException {
String username = request.getParameter("username");
UserJoinTimeAuthentication usernamePasswordAuthenticationToken =new UserJoinTimeAuthentication(username);
Authentication authentication = this.authenticationManager.authenticate(usernamePasswordAuthenticationToken);
if (authentication != null) {
super.setContinueChainBeforeSuccessfulAuthentication(true);
}
return authentication;
}
}
该类继承AbstractAuthenticationProcessingFilter，这个filter的作用是对最基本的用户验证的处理，我们必须重写attemptAuthentication方法。Authentication接口表示授权接口，通常情况下业务认证通过时会返回一个这个对象。super.setContinueChainBeforeSuccessfulAuthentication(true) 设置成true的话，会交给其他过滤器处理。
二、定义UserJoinTimeAuthentication
package com.bdqn.lyrk.security.study.web.authentication;
import org.springframework.security.authentication.AbstractAuthenticationToken;
public class UserJoinTimeAuthentication extends AbstractAuthenticationToken {
private String username;
public UserJoinTimeAuthentication(String username) {
super(null);
this.username = username;
}
@Override
public Object getCredentials() {
return null;
}
@Override
public Object getPrincipal() {
return username;
}
}
自定义授权方式，在这里接收username的值处理，其中getPrincipal我们可以用来存放登录名，getCredentials可以存放密码，这些方法来自于Authentication接口
三、定义AuthenticationProvider
package com.bdqn.lyrk.security.study.web.authentication;
import com.bdqn.lyrk.security.study.app.pojo.Student;
import org.springframework.security.authentication.AuthenticationProvider;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import java.util.Date;
/**
* 基本的验证方式
*
* @author chen.nie
* @date 2018/6/12
**/
public class UserJoinTimeAuthenticationProvider implements AuthenticationProvider {
private UserDetailsService userDetailsService;
public UserJoinTimeAuthenticationProvider(UserDetailsService userDetailsService) {
this.userDetailsService = userDetailsService;
}
/**
* 认证授权，如果jointime在当前时间之后则认证通过
* @param authentication
* @return
* @throws AuthenticationException
*/
@Override
public Authentication authenticate(Authentication authentication) throws AuthenticationException {
String username = (String) authentication.getPrincipal();
UserDetails userDetails = this.userDetailsService.loadUserByUsername(username);
if (!(userDetails instanceof Student)) {
return null;
}
Student student = (Student) userDetails;
if (student.getJoinTime().after(new Date()))
return new UserJoinTimeAuthentication(username);
return null;
}
/**
* 只处理UserJoinTimeAuthentication的认证
* @param authentication
* @return
*/
@Override
public boolean supports(Class<?> authentication) {
return authentication.getName().equals(UserJoinTimeAuthentication.class.getName());
}
}
AuthenticationManager会委托AuthenticationProvider进行授权处理，在这里我们需要重写support方法，该方法定义Provider支持的授权对象，那么在这里我们是对UserJoinTimeAuthentication处理。
四、WebSecurityConfig
package com.bdqn.lyrk.security.study.app.config;
import com.bdqn.lyrk.security.study.app.service.UserService;
import com.bdqn.lyrk.security.study.web.authentication.UserJoinTimeAuthenticationProvider;
import com.bdqn.lyrk.security.study.web.filter.CustomerAuthFilter;
import org.springframework.beans.factory.annotation.Autowired;
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.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
/**
* spring-security的相关配置
*
* @author chen.nie
* @date 2018/6/7
**/
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
@Autowired
private UserService userService;
@Override
protected void configure(HttpSecurity http) throws Exception {
/*
1.配置静态资源不进行授权验证
2.登录地址及跳转过后的成功页不需要验证
3.其余均进行授权验证
*/
http.
authorizeRequests().antMatchers("/static/**").permitAll().
and().authorizeRequests().antMatchers("/user/**").hasRole("7022").
and().authorizeRequests().anyRequest().authenticated().
and().formLogin().loginPage("/login").successForwardUrl("/toIndex").permitAll()
.and().logout().logoutUrl("/logout").invalidateHttpSession(true).deleteCookies().permitAll()
;
http.addFilterBefore(new CustomerAuthFilter(authenticationManager()), UsernamePasswordAuthenticationFilter.class);
}
@Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
//设置自定义userService
auth.userDetailsService(userService);
auth.authenticationProvider(new UserJoinTimeAuthenticationProvider(userService));
}
@Override
public void configure(WebSecurity web) throws Exception {
super.configure(web);
}
}
在这里面我们通过HttpSecurity的方法来添加我们自定义的filter，一定要注意先后顺序。在AuthenticationManagerBuilder当中还需要添加我们刚才定义的AuthenticationProvider
启动成功后，我们将Student表里的jointime值改为早于今天的时间，进行登录可以发现：
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
