安全验证框架shiro(三)

sucl

发布于 2019-08-07 11:49:17

4940

发布于 2019-08-07 11:49:17

文章被收录于专栏：企业平台构建

主要还是对shiro在web项目使用的一下简要说明与实例。

首先看该项目配置相关的信息，使用的idea，创建maven项目，并在pom.xml中加入如下依赖:

        <!-- slf4j作为日志框架配合logback,jcl-over-slf4j相当于把jcl(common-logging)转接由slf4j实现 -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.21</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>jcl-over-slf4j</artifactId>
            <version>1.7.21</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.1.7</version>
            <scope>runtime</scope>
        </dependency>

        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.4</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.41</version>
        </dependency>
        <!-- Shiro dependencies: -->
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-core</artifactId>
            <version>${shiro.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-web</artifactId>
            <version>${shiro.version}</version>
        </dependency>
       <!-- servlet -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.1</version>
        </dependency>
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

同时web.xml配置如下：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">

    <display-name>shiro-simple-web</display-name>

    <context-param>
        <param-name>shiroConfigLocations</param-name>
        <param-value>/WEB-INF/shiro.ini</param-value>
    </context-param>

    <listener>
        <listener-class>org.apache.shiro.web.env.EnvironmentLoaderListener</listener-class>
    </listener>

    <filter>
        <filter-name>ShiroFilter</filter-name>
        <filter-class>org.apache.shiro.web.servlet.ShiroFilter</filter-class>
        <!--<init-param>-->
            <!--<param-name>configPath</param-name>-->
            <!--<param-value>/WEB-INF/shiro.ini</param-value>-->
        <!--</init-param>-->
    </filter>

    <filter-mapping>
        <filter-name>ShiroFilter</filter-name>
        <url-pattern>/*</url-pattern>
        <dispatcher>REQUEST</dispatcher>
        <dispatcher>FORWARD</dispatcher>
        <dispatcher>INCLUDE</dispatcher>
        <dispatcher>ERROR</dispatcher>
    </filter-mapping>
</web-app>

由于没有借助spring等工具，shiro相关的配置通过shrio.ini完成：

[main]
#form提交的地址必须是authc.loginUrl相同
authc.loginUrl = /login.jsp
authc.successUrl= /pages/index.html
roles.unauthorizedUrl = nonrole.jsp
perms.unauthorizedUrl =  nunperm.jsp

#securityManager=org.apache.shiro.mgt.DefaultWebSecurityManager
dataSource=org.apache.commons.dbcp.BasicDataSource
dataSource.driverClassName=com.mysql.jdbc.Driver
dataSource.url=jdbc:mysql://127.0.0.1:3306/shiro
dataSource.username=root
dataSource.password=123456

jdbcRealm=org.apache.shiro.realm.jdbc.JdbcRealm
jdbcRealm.dataSource=$dataSource
myRealm=com.sucl.shiro.realm.MyRealm
securityManager.realms=$jdbcRealm
#多realm
#覆盖默认的securityManager
#securityManager=org.apache.shiro.mgt.DefaultSecurityManager

#authenticator
#authenticator=org.apache.shiro.authc.pam.ModularRealmAuthenticator
#authenticationStrategy=org.apache.shiro.authc.pam.AtLeastOneSuccessfulStrategy
#authenticator.authenticationStrategy=$authenticationStrategy
#securityManager.authenticator=$authenticator

#authorizer
#authorizer=org.apache.shiro.authz.ModularRealmAuthorizer
#permissionResolver=org.apache.shiro.authz.permission.WildcardPermissionResolver
#authorizer.permissionResolver=$permissionResolver
#securityManager.authorizer=$authorizer

[urls]
/login.jsp = authc
/index.jsp = authc
/logout = logout
/static/** = anon
/pages/** = authc
/** = authc

之前是通过定义login页面，提交请求到指定路径，然后通过Subject.login(token)完成。今天直接通过authc完成自动登录。

对于shiro作为轻量级的安全框架主要是其内部将负责的认证、鉴权都已完成，我们需要做的仅定义认证鉴权相关的逻辑关系。站在开发者的角度，shiro的整个处理过程包含以下几点：

创建token，一般通过form表单提交配置authc，即FormAuthenticationFilter，创建UsernamePasswordToken
由Subject.login(Token)进行登录认证，其实是有SecurityManager完成
最终调用Realm对应的doGetAuthenticationInfo方法，构建SimpleAuthenticationInfo对象，此对象有两个参数principal、credentials，第一个对象在鉴权时用到，认证时shiro只会验证credentials
调用Realm对应的doGetAuthorizationInfo方法，通过上一步的principal的后去对应的角色、权限信息，并封装到SimpleAuthorizationInfo即可

对与我们，若果需要扩展，比如多表登录，同表多字段登录，就可以对其中的的几个关键对象进行扩展，token、principal、SimpleAuthenticationInfo、SimpleAuthorizationInfo，具体做法下次和springmvc整合提供。

本次代码地址：https://github.com/suspring/shiro-simpler-web.git

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