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SpringSecurity实现动态url拦截(基于rbac模型)

2021-08-18 16:57:26 作者：wx59ef4723c1b54

本文主要介绍了SpringSecurity动态url拦截，文中通过示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

后续会讲解如何实现方法拦截。其实与url拦截大同小异。

拦截方法，会更简单一点吧基于PermissionEvaluator 可以自行先了解

1、了解主要的过滤器

1、SecurityMetadataSource

权限资源拦截器。

有一个接口继承与它FilterInvocationSecurityMetadataSource，但FilterInvocationSecurityMetadataSource只是一个标识接口，
对应于FilterInvocation，本身并无任何内容：

主要方法：

    public Collection<ConfigAttribute> getAttributes(Object object) throws IllegalArgumentException {
     
    }

每一次请求url，都会调用这个方法。object存储了请求的信息。如;rul

2、UserDetailsService

用户登录，会先调用这里面的 loadUserByUsername。通过用户名去查询用户是否存在数据库。

在这里面进行查询，获得用户权限信息

3、AccessDecisionManager

里面的decide方法。

// decide 方法是判定是否拥有权限的决策方法，
    //authentication 是释UserService中循环添加到 GrantedAuthority 对象中的权限信息集合.
    //object 包含客户端发起的请求的requset信息
    ，可转换为 HttpServletRequest request = ((FilterInvocation) object).getHttpRequest();
    //configAttributes 为MyInvocationSecurityMetadataSource的getAttributes(Object object)这个方法返回的结果，
    此方法是为了判定用户请求的url 是否在权限表中，如果在权限表中，则返回给 decide 方法，
    用来判定用户是否有此权限。如果不在权限表中则放行。
    @Override
    public void decide(Authentication authentication, Object o, Collection<ConfigAttribute> configAttributes)

2、正式实战了

1 使用idea的Srping Initializr 创建一个项目我的版本如下Pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>


    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <maven.compiler.target>1.8</maven.compiler.target>
        <maven.compiler.source>1.8</maven.compiler.source>
        <mybatis.version>3.2.7</mybatis.version>
        <mybatis-spring.version>1.2.2</mybatis-spring.version>
    </properties>



    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!--提供security相关标签,可选可不选-->
        <dependency>
            <groupId>org.thymeleaf.extras</groupId>
            <artifactId>thymeleaf-extras-springsecurity4</artifactId>
        </dependency>
        <!--bootstrap组件,可选可不选-->
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>bootstrap</artifactId>
            <version>3.3.7</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.6</version>
        </dependency>

        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.2</version>
            <exclusions>
                <exclusion>
                    <groupId>commons-logging</groupId>
                    <artifactId>commons-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <!--mybatis-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>${mybatis-spring.version}</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

2，创建一个springSecurity配置类，你也可以使用配置文件的方法。我这里使用了boot的配置类

package com.example.config;

import com.example.service.CustomUserService;
import com.example.service.MyFilterSecurityInterceptor;
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.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.web.access.intercept.FilterSecurityInterceptor;


@Configuration  //声明为配置类
@EnableWebSecurity  //这里启动security
public class SpringSecurityConfig extends WebSecurityConfigurerAdapter{

    @Autowired  //下面会编写这个类
    private MyFilterSecurityInterceptor myFilterSecurityInterceptor;

    @Autowired   //下面会编写这个类
    private DefaultAccessDeniedHandler defaultAccessDeniedHandler;

    @Bean   
    UserDetailsService customUserService(){ //注册UserDetailsService 的bean
        return new CustomUserService();
    }
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(customUserService()); //user Details Service验证
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.exceptionHandling()
                .accessDeniedHandler(defaultAccessDeniedHandler);
        http.authorizeRequests()
                .antMatchers("/css/**").permitAll()
                .anyRequest().authenticated() //任何请求,登录后可以访问
                .and()
                .formLogin().loginPage("/login").failureUrl("/login?error").permitAll() //登录页面用户任意访问
                .and()
                .logout().permitAll(); //注销行为任意访问
        http.addFilterBefore(myFilterSecurityInterceptor, FilterSecurityInterceptor.class);
    }

}

3、自定义SecurityMetadataSource拦截器

package com.example.service;

import com.example.dao.PermissionDao;
import com.example.domain.Permission;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.access.SecurityConfig;
import org.springframework.security.web.FilterInvocation;
import org.springframework.security.web.access.intercept.FilterInvocationSecurityMetadataSource;
import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpServletRequest;
import java.util.*;

/**
 */
@Service
public class MyInvocationSecurityMetadataSourceService  implements
        FilterInvocationSecurityMetadataSource {


    private HashMap<String, Collection<ConfigAttribute>> map =null;

    @Autowired
    private PermissionDao permissionDao;

    /**
     * 自定义方法。最好在项目启动时，去数据库查询一次就好。
     * 数据库查询一次 权限表出现的所有要拦截的url
     */
    public void loadResourceDefine(){
        map = new HashMap<>();
        Collection<ConfigAttribute> array;
        ConfigAttribute cfg;
        //去数据库查询 使用dao层。 你使用自己的即可
        List<Permission> permissions = permissionDao.findAll();
        for(Permission permission : permissions) {
            array = new ArrayList<>();
            //下面你可以添加你想要比较的信息过去。 注意的是，需要在用户登录时存储的权限信息一致
            cfg = new SecurityConfig(permission.getName());
            //此处添加了资源菜单的名字，例如请求方法到ConfigAttribute的集合中去。此处添加的信息将会作为MyAccessDecisionManager类的decide的第三个参数。
           
            array.add(cfg);
            //用权限的getUrl() 作为map的key，用ConfigAttribute的集合作为 value，
            map.put(permission.getUrl(), array);
        }

    }

    //此方法是为了判定用户请求的url 是否在权限表中，如果在权限表中，则返回给 decide 方法，用来判定用户是否有此权限。如果不在权限表中则放行。
    @Override
    public Collection<ConfigAttribute> getAttributes(Object object) throws IllegalArgumentException {
        FilterInvocation filterInvocation = (FilterInvocation) object;
        String fullRequestUrl = filterInvocation.getFullRequestUrl();
        //若是静态资源 不做拦截  下面写了单独判断静态资源方法
        if (isMatcherAllowedRequest(filterInvocation)) {
            System.out.println("我没有被拦截"+fullRequestUrl);
           return null;
        }
        //map 为null 就去数据库查
        if(map ==null)  {
         loadResourceDefine();
        }
        //测试 先每次都查
        //object 中包含用户请求的request 信息


        HttpServletRequest request = filterInvocation.getHttpRequest();
        AntPathRequestMatcher matcher;
        String resUrl;
        for(Iterator<String> iter = map.keySet().iterator(); iter.hasNext(); ) {
            resUrl = iter.next();
            matcher = new AntPathRequestMatcher(resUrl);
            if(matcher.matches(request)) {
                return map.get(resUrl);
            }
        }
        return null;
    }


    /**
     * 判断当前请求是否在允许请求的范围内
     * @param fi 当前请求
     * @return 是否在范围中
     */
    private boolean isMatcherAllowedRequest(FilterInvocation fi){
        return allowedRequest().stream().map(AntPathRequestMatcher::new)
                .filter(requestMatcher -> requestMatcher.matches(fi.getHttpRequest()))
                .toArray().length > 0;
    }

    /**
     * @return 定义允许请求的列表
     */
    private List<String> allowedRequest(){
        return Arrays.asList("/login","/css/**","/fonts/**","/js/**","/scss/**","/img/**");
    }


    @Override
    public Collection<ConfigAttribute> getAllConfigAttributes() {
        return null;
    }

    @Override
    public boolean supports(Class<?> clazz) {
        return true;
    }
}

自定义UserDetailsService 。登录的时候根据用户名去数据库查询用户拥有的权限信息

package com.example.service;

import com.example.dao.PermissionDao;
import com.example.dao.UserDao;
import com.example.domain.Permission;
import com.example.domain.SysRole;
import com.example.domain.SysUser;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by yangyibo on 17/1/18.
 */
@Service
public class CustomUserService implements UserDetailsService { //自定义UserDetailsService 接口

    @Autowired
    UserDao userDao;
    @Autowired
    PermissionDao permissionDao;

    public UserDetails loadUserByUsername(String username) {
        SysUser user = userDao.findByUserName(username);
        for (SysRole role : user.getRoles()) {
            System.out.println(role.getName());
        }
        if (user != null) {
            //根据用户id 去查找用户拥有的资源
            List<Permission> permissions = permissionDao.findByAdminUserId(user.getId());
            List<GrantedAuthority> grantedAuthorities = new ArrayList <>();
            for (Permission permission : permissions) {
                if (permission != null && permission.getName()!=null) {

                    GrantedAuthority grantedAuthority = new SimpleGrantedAuthority(permission.getName());
                    //1：此处将权限信息添加到 GrantedAuthority 对象中，在后面进行全权限验证时会使用GrantedAuthority 对象。
                    grantedAuthorities.add(grantedAuthority);
                }
            }
            return new User(user.getUsername(), user.getPassword(), grantedAuthorities);
        } else {
            throw new UsernameNotFoundException("admin: " + username + " do not exist!");
        }
    }

}

自定义AccessDecisionManager

package com.example.service;

import org.springframework.security.access.AccessDecisionManager;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.stereotype.Service;

import java.util.Collection;
import java.util.Iterator;

@Service
public class MyAccessDecisionManager implements AccessDecisionManager {

    // decide 方法是判定是否拥有权限的决策方法，
    //authentication 是释CustomUserService中循环添加到 GrantedAuthority 对象中的权限信息集合.
    //object 包含客户端发起的请求的requset信息，可转换为 HttpServletRequest request = ((FilterInvocation) object).getHttpRequest();
    //configAttributes 为MyInvocationSecurityMetadataSource的getAttributes(Object object)这个方法返回的结果，此方法是为了判定用户请求的url 是否在权限表中，如果在权限表中，则返回给 decide 方法，用来判定用户是否有此权限。如果不在权限表中则放行。
    @Override
    public void decide(Authentication authentication, Object o, Collection<ConfigAttribute> configAttributes) throws AccessDeniedException, InsufficientAuthenticationException {
        if (null == configAttributes || configAttributes.size() <= 0 ) {
            return;
        }
        ConfigAttribute c;
        String needRole;

        for (Iterator<ConfigAttribute> iter = configAttributes.iterator(); iter.hasNext(); ) {
            c = iter.next();
            needRole = c.getAttribute();
            for (GrantedAuthority ga : authentication.getAuthorities()) { //authentication 为在注释1 中循环添加到 GrantedAuthority 对象中的权限信息集合
                if (needRole.trim().equals(ga.getAuthority())) {
                    return;
                }
            }
        }
        throw new AccessDeniedException("no right");
    }

    @Override
    public boolean supports(ConfigAttribute configAttribute) {
        return true;
    }

    @Override
    public boolean supports(Class<?> aClass) {
        return true;
    }
}

自定义拦截器

package com.example.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.access.SecurityMetadataSource;
import org.springframework.security.access.intercept.AbstractSecurityInterceptor;
import org.springframework.security.access.intercept.InterceptorStatusToken;
import org.springframework.security.web.FilterInvocation;
import org.springframework.security.web.access.intercept.FilterInvocationSecurityMetadataSource;
import org.springframework.stereotype.Service;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import java.io.IOException;


@Service
public class MyFilterSecurityInterceptor extends AbstractSecurityInterceptor implements Filter {

    @Autowired
    private FilterInvocationSecurityMetadataSource securityMetadataSource;

    @Autowired
    private void setMyAccessDecisionManager(MyAccessDecisionManager myAccessDecisionManager) {
        super.setAccessDecisionManager(myAccessDecisionManager);
    }


    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }


    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        FilterInvocation fi = new FilterInvocation(servletRequest, servletResponse, filterChain);
        invoke(fi);
    }

    public void invoke(FilterInvocation fi) throws IOException, ServletException {
//fi里面有一个被拦截的url
//里面调用MyInvocationSecurityMetadataSource的getAttributes(Object object)这个方法获取fi对应的所有权限
//再调用MyAccessDecisionManager的decide方法来校验用户的权限是否足够
        InterceptorStatusToken token = super.beforeInvocation(fi);
        try {
//执行下一个拦截器
            fi.getChain().doFilter(fi.getRequest(), fi.getResponse());
        } finally {
            super.afterInvocation(token, null);
        }
    }

    @Override
    public void destroy() {

    }

    @Override
    public Class<?> getSecureObjectClass() {
        return FilterInvocation.class;
    }

    @Override
    public SecurityMetadataSource obtainSecurityMetadataSource() {
        return this.securityMetadataSource;
    }
}

运行项目就实现了。去试试吧。
记得将自定义拦截器放进security的过滤器链中。

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