Shiro 自定义登陆、授权、拦截器

Shiro

  • 登陆、授权、拦截
  • 按钮权限控制

一、目标

  • Maven+Spring+shiro
  • 自定义登陆、授权
  • 自定义拦截器
  • 加载数据库资源构建拦截链
使用总结:
1、需要设计的数据库:用户、角色、权限、资源
2、可以通过,角色,权限,两个拦截器同时确定是否能访问
3、角色与权限的关系,role1=permission1,permission2,多级的权限:sys:permission1,拥有高级权限同时用于低级权限。
4、perms["permission1"] 为权限
5、拦截器机制介绍了拦截角色还是权限
6、角色与权限 是两个概念
7、权限-资源,一对一。资源分为上下级,因此权限分为父权限,子权限。创建资源的时候,创建权限。权限里资源的别名
8、角色-权限,一对多。角色里权限的别名
9、按钮是通过权限来控制的
10、防止有父级资源可以访问,子级资源不能访问的情况,不适用 sys:add 权限写法

二、代码

1、Pom.xml

 1     <properties>
 2         <spring.version>4.3.4.RELEASE</spring.version>
 3     </properties>
 4         <dependency>
 5             <groupId>junit</groupId>
 6             <artifactId>junit</artifactId>
 7             <version>4.9</version>
 8         </dependency>
 9         <dependency>
10             <groupId>commons-logging</groupId>
11             <artifactId>commons-logging</artifactId>
12             <version>1.1.3</version>
13         </dependency>
14         <dependency>
15             <groupId>org.apache.shiro</groupId>
16             <artifactId>shiro-core</artifactId>
17             <version>1.2.2</version>
18         </dependency>
19         <dependency>
20             <groupId>org.apache.shiro</groupId>
21             <artifactId>shiro-spring</artifactId>
22             <version>1.2.2</version>
23         </dependency>
24         <dependency>
25             <groupId>javax.servlet</groupId>
26             <artifactId>javax.servlet-api</artifactId>
27             <version>3.0.1</version>
28             <scope>provided</scope>
29         </dependency>
30         <dependency>
31             <groupId>org.springframework</groupId>
32             <artifactId>spring-web</artifactId>
33             <version>${spring.version}</version>
34         </dependency>
35         <dependency>
36             <groupId>org.apache.shiro</groupId>
37             <artifactId>shiro-ehcache</artifactId>
38             <version>1.2.2</version>
39         </dependency>
40         <dependency>
41             <groupId>org.springframework</groupId>
42             <artifactId>spring-context</artifactId>
43             <version>${spring.version}</version>
44         </dependency>
45         <dependency>
46             <groupId>org.apache.shiro</groupId>
47             <artifactId>shiro-web</artifactId>
48             <version>1.2.2</version>
49         </dependency>
50         <dependency>
51             <groupId>net.sf.ehcache</groupId>
52             <artifactId>ehcache</artifactId>
53             <version>2.10.1</version>
54     </dependency>            

2、web.xml

  Servlet拦截访问,使用注解更方便,需要删除项目中的servlet使用javax.servlet-api 3.0 包

 1 package com.cyd.shiro;
 2 
 3 import java.io.IOException;
 4 
 5 import javax.servlet.ServletException;
 6 import javax.servlet.annotation.WebServlet;
 7 import javax.servlet.http.HttpServlet;
 8 import javax.servlet.http.HttpServletRequest;
 9 import javax.servlet.http.HttpServletResponse;
10 
11 import org.apache.shiro.SecurityUtils;
12 import org.apache.shiro.authc.AuthenticationException;
13 import org.apache.shiro.authc.IncorrectCredentialsException;
14 import org.apache.shiro.authc.UnknownAccountException;
15 import org.apache.shiro.authc.UsernamePasswordToken;
16 import org.apache.shiro.subject.Subject;
17 import org.apache.shiro.web.util.SavedRequest;
18 import org.apache.shiro.web.util.WebUtils;
19 import org.junit.Test;
20 
21 @WebServlet(name = "loginServlet", urlPatterns = "/loginController")
22 public class LoginServlet extends HttpServlet {
23     @Override
24     protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
25         req.getRequestDispatcher("login.jsp").forward(req, resp);
26     }
27 
28     @Override
29     protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
30         System.out.println(LoginServlet.class.toString());
31         String error = null;
32         String username = req.getParameter("username");
33         String password = req.getParameter("password");
34         Subject subject = SecurityUtils.getSubject();
35         UsernamePasswordToken token = new UsernamePasswordToken(username, password);
36         try {
37             subject.login(token); 
38         } catch (UnknownAccountException e) { 
39             error = "用户名/密码错误";
40         } catch (IncorrectCredentialsException e) {
41             error = "用户名/密码错误";
42         } catch (AuthenticationException e) {
43             // 其他错误,比如锁定,如果想单独处理请单独catch处理
44             error = "其他错误:" + e.getMessage();
45         }
46         if (error != null) {// 出错了,返回登录页面
47             req.setAttribute("error", error);
48             req.getRequestDispatcher("login.jsp").forward(req, resp);
49         } else {// 登录成功
50             //跳转到拦截登陆前的地址
51             SavedRequest request=WebUtils.getSavedRequest(req);
52             String url =request.getRequestURI();
53             req.getRequestDispatcher(url.substring(url.lastIndexOf('/'))).forward(req, resp);
54         }
55     }
56     
57 }

 

3、Spring-shiro.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:util="http://www.springframework.org/schema/util"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context.xsd
    http://www.springframework.org/schema/util 
    http://www.springframework.org/schema/util/spring-util-4.2.xsd">

    <context:component-scan base-package="com.cyd.shiro.*"></context:component-scan>

    <!-- Shiro的Web过滤器 -->
    <bean id="shiroFilter" class="com.cyd.shiro.ExtendShiroFilterFactoryBean">
        <property name="securityManager" ref="securityManager" />
        <property name="loginUrl" value="/login.jsp" />
        <!-- <property name="successUrl" value="/index.jsp" /> -->
        <property name="unauthorizedUrl" value="/unauthorized.jsp" />
        <property name="filters">
            <util:map>
                <!-- <entry key="onperms" value-ref="URLPermissionsFilter" /> -->
                <entry key="onrole" value-ref="ExtendRolesAuthorizationFilter" />
            </util:map>
        </property> 
        <property name="filterChainDefinitions">
            <value>
                /unauthorized.jsp = anon
                /logoutController=anon
                /login.jsp=authc
            </value>
        </property>
    </bean>

    <!-- 安全管理器 -->
    <bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">
        <property name="realm" ref="myRealm" />
        <property name="cacheManager" ref="cacheManager" />
    </bean>
    <!-- 自定义认证,授权 -->
    <bean id="myRealm" class="com.cyd.shiro.AdminRealm"></bean>

    <!-- 注册ehcache,不然每次访问都要登陆 -->
    <bean id="cacheManager" class="org.apache.shiro.cache.ehcache.EhCacheManager">
        <property name="cacheManagerConfigFile" value="classpath:ehcache.xml" />
    </bean>
    <!-- 自定义鉴权拦截器 -->
    <bean id="URLPermissionsFilter" class="com.cyd.shiro.URLPermissionsFilter" />
    <bean id="ExtendRolesAuthorizationFilter" class="com.cyd.shiro.ExtendRolesAuthorizationFilter" />

</beans>

 

4、Ehcache.xml 缓存

<?xml version="1.0" encoding="UTF-8"?>
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../config/ehcache.xsd">
<diskStore path="java.io.tmpdir"/>
<defaultCache
        maxElementsInMemory="10000"    
        eternal="false"
        timeToIdleSeconds="600"
        timeToLiveSeconds="600"
        overflowToDisk="true"
        maxElementsOnDisk="10000000"
        diskPersistent="false"
        diskExpiryThreadIntervalSeconds="120"
        memoryStoreEvictionPolicy="LRU"
        />

<!-- 
    内存中最多可以存储多少个数据 
    是否永久有效
    空闲时间
    存活时间
    内存空间不够是否存储到磁盘
    磁盘最大存储个数
    服务器重启,磁盘数据是否需要
    线程
    淘汰策略(最近最少使用)  
 -->  
</ehcache>

5、登陆Servlet

package com.cyd.shiro;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.IncorrectCredentialsException;
import org.apache.shiro.authc.UnknownAccountException;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.subject.Subject;
import org.apache.shiro.web.util.SavedRequest;
import org.apache.shiro.web.util.WebUtils;

@WebServlet(name = "loginServlet", urlPatterns = "/loginController")
public class LoginServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        req.getRequestDispatcher("login.jsp").forward(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println(LoginServlet.class.toString());
        String error = null;
        String username = req.getParameter("username");
        String password = req.getParameter("password");
        Subject subject = SecurityUtils.getSubject();
        UsernamePasswordToken token = new UsernamePasswordToken(username, password);
        try {
            subject.login(token); 
        } catch (UnknownAccountException e) { 
            error = "用户名/密码错误";
        } catch (IncorrectCredentialsException e) {
            error = "用户名/密码错误";
        } catch (AuthenticationException e) {
            // 其他错误,比如锁定,如果想单独处理请单独catch处理
            error = "其他错误:" + e.getMessage();
        }
        if (error != null) {// 出错了,返回登录页面
            req.setAttribute("error", error);
            req.getRequestDispatcher("login.jsp").forward(req, resp);
        } else {// 登录成功
            //跳转到拦截登陆前的地址
            SavedRequest request=WebUtils.getSavedRequest(req);
            String url =request.getRequestURI();
            req.getRequestDispatcher(url.substring(url.lastIndexOf('/'))).forward(req, resp);
        }
    }
    
}

 

6、自定义登陆、授权。

  根据需求自定义登陆异常。从数据库查询出当前用户拥有的权限并授权

  

 1 package com.cyd.shiro;
 2 
 3 import java.util.HashSet;
 4 import java.util.LinkedList;
 5 import java.util.List;
 6 import java.util.Set;
 7 
 8 import org.apache.shiro.authc.AuthenticationException;
 9 import org.apache.shiro.authc.AuthenticationInfo;
10 import org.apache.shiro.authc.AuthenticationToken;
11 import org.apache.shiro.authc.SimpleAuthenticationInfo;
12 import org.apache.shiro.authc.UnknownAccountException;
13 import org.apache.shiro.authz.AuthorizationInfo;
14 import org.apache.shiro.authz.SimpleAuthorizationInfo;
15 import org.apache.shiro.realm.AuthorizingRealm;
16 import org.apache.shiro.subject.PrincipalCollection;
17 import org.springframework.beans.factory.annotation.Autowired;
18 
19 import com.cyd.helloworld.SysRoles;
20 import com.cyd.helloworld.SysUsers;
21 import com.cyd.shiro.admin.SysUsersService;
22 
23 public class AdminRealm extends AuthorizingRealm {
24     
25     @Autowired
26     private SysUsersService    sysusersservice;
27     // 认证登陆
28     @Override
29     protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
30         System.out.println("do doGetAuthenticationInfo");
31         String username = (String) token.getPrincipal();
32         SysUsers user = sysusersservice.getSysUsers(username);
33         if (user == null) {
34             throw new UnknownAccountException();// 没找到帐号
35         }
36         SimpleAuthenticationInfo authenticationInfo = new SimpleAuthenticationInfo(user.getUserName(), // 用户名
37                 user.getPassWorld(), // 密码
38                 getName() // realm name
39         );
40         return authenticationInfo;
41     }
42 
43     // 用户授权
44     @Override
45     protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
46         System.out.println("do doGetAuthorizationInfo");
47         String username = (String)principals.getPrimaryPrincipal();  
48         SimpleAuthorizationInfo authorizationInfo = new SimpleAuthorizationInfo();
49         //从数据库加载当前用户的角色,例如:[admin]
50         authorizationInfo.setRoles(new HashSet<String>(sysusersservice.getSysRoles(username)));
51         //从数据库加载当前用户可以访问的资源,例如:[index.jsp, abc.jsp]
52         authorizationInfo.setStringPermissions(new HashSet<String>(sysusersservice.getSysResource(username)));
53         
54         return authorizationInfo;  
55     }
56 }

 

7、自定义拦截器。

  重写拦截器是因为shiro 验证是否有权限访问是需要当前用户拥有拦截器链的所有权限。一般需求只需要拥有部分权限即可。

       角色验证拦截,hasRole和hasAllRoles 验证是否有权限。

 1 package com.cyd.shiro;
 2 
 3 import java.io.IOException;
 4 import java.util.Set;
 5 
 6 import javax.servlet.ServletRequest;
 7 import javax.servlet.ServletResponse;
 8 
 9 import org.apache.shiro.subject.Subject;
10 import org.apache.shiro.util.CollectionUtils;
11 import org.apache.shiro.web.filter.authz.RolesAuthorizationFilter;
12 
13 /**
14  * 通过角色验证权限
15  * @author chenyd
16  * 2017年11月21日
17  */
18 public class ExtendRolesAuthorizationFilter extends RolesAuthorizationFilter{
19     
20     @Override
21     public boolean isAccessAllowed(ServletRequest request, ServletResponse response, Object mappedValue) throws IOException {
22         
23         System.out.println(ExtendRolesAuthorizationFilter.class.toString());
24         Subject subject = getSubject(request, response);
25         String[] rolesArray = (String[]) mappedValue;
26 
27         if (rolesArray == null || rolesArray.length == 0) {
28             //no roles specified, so nothing to check - allow access.
29             return true;
30         }
31         //AbstractFilter
32         Set<String> roles = CollectionUtils.asSet(rolesArray);
33         
34         boolean flag=false;
35         for(String role: roles){
36             if(subject.hasRole(role)){
37                 flag=true;
38                 break;
39             }
40         }
41         return flag;
42     }
43 }

       url拦截校验,isPermitted和isPermittedAll验证是否有权限访问,

 1 package com.cyd.shiro;
 2 
 3 import java.io.IOException;
 4 
 5 import javax.servlet.ServletRequest;
 6 import javax.servlet.ServletResponse;
 7 import javax.servlet.http.HttpServletRequest;
 8 
 9 import org.apache.shiro.subject.Subject;
10 import org.apache.shiro.web.filter.authz.PermissionsAuthorizationFilter;
11 /**
12  * 通过字符串验证权限
13  * @author chenyd
14  * 2017年11月21日
15  */
16 public class URLPermissionsFilter extends PermissionsAuthorizationFilter {
17 
18     /**
19      * mappedValue 访问该url时需要的权限
20      * subject.isPermitted 判断访问的用户是否拥有mappedValue权限
21      * 重写拦截器,只要符合配置的一个权限,即可通过
22      */
23     @Override
24     public boolean isAccessAllowed(ServletRequest request, ServletResponse response, Object mappedValue)
25             throws IOException {
26         System.out.println(URLPermissionsFilter.class.toString());
27         Subject subject = getSubject(request, response);
28         // DefaultFilterChainManager
29         // PathMatchingFilterChainResolver
30         String[] perms = (String[]) mappedValue;
31         boolean isPermitted = false;
32         if (perms != null && perms.length > 0) {
33             for (String str : perms) {
34                 if (subject.isPermitted(str)) {
35                     isPermitted = true;
36                 }
37             }
38         }
39 
40         return isPermitted;
41     }
42 }

8、加载数据库资源构建拦截器链

 1 package com.cyd.shiro;
 2 
 3 import java.util.Map;
 4 
 5 import org.apache.shiro.config.Ini;
 6 import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
 7 import org.apache.shiro.util.CollectionUtils;
 8 import org.apache.shiro.web.config.IniFilterChainResolverFactory;
 9 import org.springframework.beans.factory.annotation.Autowired;
10 
11 import com.cyd.shiro.admin.SysUsersService;
12 
13 public class ExtendShiroFilterFactoryBean extends ShiroFilterFactoryBean{
14     
15     @Autowired
16     private SysUsersService    sysusersservice;
17     //PathMatchingFilter
18     @Override
19     public void setFilterChainDefinitions(String definitions) {
20         //数据库中获取权限,{/index.jsp=authc,onrole["admin2","admin"], /abc.jsp=authc,onrole["admin2","admin"]}
21         Map<String, String> otherChains = sysusersservice.getFilterChain();
22         Ini ini = new Ini();
23         ini.load(definitions);
24         Ini.Section section = ini.getSection(IniFilterChainResolverFactory.URLS);
25         if (CollectionUtils.isEmpty(section)) {
26             section = ini.getSection(Ini.DEFAULT_SECTION_NAME);
27         }
28         section.putAll(otherChains);
29         setFilterChainDefinitionMap(section);
30     }
31     
32 }

 

三、  学习笔记

1、INI文件配置

[users]  #提供了对用户/密码及其角色的配置,用户名=密码,角色1,角色2  

zhang=123,admin

[roles]  #提供了角色及权限之间关系的配置,角色=权限1,权限2  

admin=index.jsp

[urls] 

#配置拦截器链,/** 为拦截器链名称(filterChain),authc,roles[admin],perms["index.jsp"]拦截器列表名

/login.jsp=anon

/loginController=anon

/unauthorized.jsp=anon

/**=authc,roles[admin],perms["index.jsp"] 

2、拦截器链

  Shiro的所有拦截器链名定义在源码DefaultFilter中。

anon             例子/admins/**=anon 没有参数,表示可以匿名使用。 
authc 例如/admins/user/**=authc表示需要认证(登录)才能使用,没有参数  
roles

 例子/admins/user/**=roles[admin],参数可以写多个,多个时必须加上引号,  

 并且参数之间用逗号分割,当有多个参数时,例如admins/user/**=roles["admin,guest"],  

 每个参数通过才算通过,相当于hasAllRoles()方法。  

perms

例子/admins/user/**=perms[user:add:*],参数可以写多个,多个时必须加上引号,并且参数之间用逗号分割,  

例如/admins/user/**=perms["user:add:*,user:modify:*"],当有多个参数时必须每个参数都通过才通过,  

想当于isPermitedAll()方法。

rest

例子/admins/user/**=rest[user],根据请求的方法,相当于/admins/user/**=perms[user:method] ,  

 其中method为post,get,delete等。

port

例子/admins/user/**=port[8081],当请求的url的端口不是8081是跳转到schemal://serverName:8081?queryString,  其中schmal是协议http或https等,serverName是你访问的host,8081是url配置里port的端口,queryString是你访问的url里的?后面的参数。

authcBasic                                 

例如/admins/user/**=authcBasic没有参数表示httpBasic认证

ssl

例子/admins/user/**=ssl没有参数,表示安全的url请求,协议为https

user

例如/admins/user/**=user没有参数表示必须存在用户,当登入操作时不做检查  

注:anon,authcBasic,auchc,user是认证过滤器,  

  perms,roles,ssl,rest,port是授权过滤器  

3、拦截器链源码类关系图

  

①   NameableFilter有一个name属性,定义每一个filter的名字。

②   OncePerRequestFilter保证客户端请求后该filter的doFilter只会执行一次。

  doFilterInternal非常重要,在shiro整个filter体系中的核心方法及实质入口。另外,shiro是通过在request中设置一个该filter特定的属性值来保证该filter只会执行一次的。

③   AdviceFilter中主要是对doFilterInternal做了更细致的切分。

  springmvc中的Interceptor,doFilterInternal会先调用preHandle做一些前置判断,如果返回false则filter链不继续往下执行,

④   AccessControlFilter中的对onPreHandle方法做了进一步细化。

  isAccessAllowed方法和onAccessDenied方法达到控制效果。这两个方法都是抽象方法,由子类去实现。到这一层应该明白。isAccessAllowed和onAccessDenied方法会影响到onPreHandle方法,而onPreHandle方法会影响到preHandle方法,而preHandle方法会达到控制filter链是否执行下去的效果。所以如果正在执行的filter中isAccessAllowed和onAccessDenied都返回false,则整个filter控制链都将结束,不会到达目标方法(客户端请求的接口),而是直接跳转到某个页面(由filter定义的,将会在authc中看到)。

⑤   FormAuthenticationFiltershiro提供的登录的filter,

  saveRequestAndRedirectToLogin保存request并拦截到登陆页面,登陆成功后可从WebUtils.getSavedRequest(req);中取出。

四、未实现的功能

  • 动态URL权限控制。当修改权限时,重新加载拦截器链。
  • 密码加密
  • 记住我
  • 在线人数控制
  • 集成验证码 

五、参考链接

 

posted @ 2017-11-23 09:22  litblack  阅读(21394)  评论(0编辑  收藏  举报