AJAX和shiro的请求问题

原因：当我们使用Shiro发送AJAX请求的时候,会自动跳转页面（而AJAX不能跳转页面，添砖会出很多错误）

因为是shiro自己的原因，所以我们需要使用我们自己定义的

在shiro中使用这个类PermissionsAuthorizationFilter来过滤请求所以覆写

AJAX特点

普通请求

 

 AJAX

 

 所以我们可以通过七种不同来判断是否为AJAX请求

 写一个类继承PermissionsAuthorizationFilter

package cn.jiedada.aisell.web.shiro;

import org.apache.shiro.subject.Subject;
import org.apache.shiro.util.StringUtils;
import org.apache.shiro.web.filter.authz.PermissionsAuthorizationFilter;
import org.apache.shiro.web.util.WebUtils;

import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * 写一个自己的Shiro来判断出我们需要的东西处理Ajax权限
 */
public class AisellPermissionsAuthorizationFilter extends PermissionsAuthorizationFilter {

    @Override
    protected boolean onAccessDenied(ServletRequest request, ServletResponse response) throws IOException {
        Subject subject = this.getSubject(request, response);
        //判断用户是否登陆
        if (subject.getPrincipal() == null) {
            this.saveRequestAndRedirectToLogin(request, response);
        } else {
            //只用通过HttpServletRequest才能获得请求头中的数据才能判断
            HttpServletRequest httpRequest = (HttpServletRequest) request;
            HttpServletResponse httpResponse=(HttpServletResponse)response;
            //查看是否是AjAX请求
            String xRequested = httpRequest.getHeader("X-Requested-With");
            if(xRequested!=null&&"XMLHttpRequest".equals(xRequested)){
                //传入前需要在请求头中传入响应，让他知道我们返回的数据是AJAX请求
                httpResponse.setContentType("text/json; charset=UTF-8");
                //带回AJAX请求,把数据作为流传回去这里需要传出标准的json数据格式
                httpResponse.getWriter().print( "{"success":false,"msg":"没有权限"}");

            }else {
                String unauthorizedUrl = this.getUnauthorizedUrl();
                if (StringUtils.hasText(unauthorizedUrl)) {
                    WebUtils.issueRedirect(request, response, unauthorizedUrl);
                } else {
                    WebUtils.toHttp(response).sendError(401);
                }
            }
        }
        return false;
    }
}

把application-shiro.xml中默认的配置设置为我们自己的配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
       http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
    <!--  DefaultSecurityManager securityManager = new DefaultSecurityManager();-->
    <bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">
        <!--引入到securityManager的realm-->
        <property name="realm" ref="myRealm"/>
    </bean>
    <!--配置我自己的realm-->
    <bean id="myRealm" class="cn.jiedada.aisell.web.shiro.MyRealm">
        <!--name无关紧要-->
        <property name="name" value="myRealm"/>
        <!---->
        <property name="credentialsMatcher">
            <!--  设置密码解析器
             HashedCredentialsMatcher hashedCredentialsMatcher = new HashedCredentialsMatcher();
                     hashedCredentialsMatcher.setHashAlgorithmName("MD5");
                    hashedCredentialsMatcher.setHashIterations(10); -->
            <bean class="org.apache.shiro.authc.credential.HashedCredentialsMatcher">
                <property name="hashAlgorithmName" value="MD5"/>
                <property name="hashIterations" value="10"/>
            </bean>
        </property>
    </bean>
    <!--下放请求到当前页面-->
    <bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
        <property name="securityManager" ref="securityManager"/>
        <!--当我们没登陆的是否跳到当前页面-->
        <property name="loginUrl" value="/login"/>
        <!--登陆成功调到该页面-->
        <property name="successUrl" value="/s/index.jsp"/>
        <!--有权限的，如果没有则跳转到该页面-->
        <property name="unauthorizedUrl" value="/s/unauthorized.jsp"/>
        <!--/s/login = anon放行
         /s/permission.jsp = perms[user:index]需要user:index权限才能访问
                /** = authc -->
<!--        <property name="filterChainDefinitions">
            <value>
                /s/login = anon
                /login = anon
                /s/permission.jsp = perms[user:index]
                /** = authc
            </value>
        </property>-->
        <property name="filterChainDefinitionMap" ref="filterChainDefinitionMap"></property>
        <!--配置一个可以不适用默认连接Shiro的
        通过key区分是我们的shiro还是自带的
         map.put(p.getUrl(),"perms["+p.getSn()+"]");这样是自带的
         而 map.put(p.getUrl(),"aisellPers["+p.getSn()+"]");就变成了我们这个的权限
         -->
        <property name="filters">
            <map>
                <entry key="aisellPers" value-ref="aisellPermissionsAuthorizationFilter"></entry>
            </map>
        </property>
    </bean>
    <bean id="aisellPermissionsAuthorizationFilter" class="cn.jiedada.aisell.web.shiro.AisellPermissionsAuthorizationFilter"></bean>
    <bean id="filterChainDefinitionMap" factory-bean="shiroFilterMapFactory" factory-method="createMap" />
    <!--配置返回shiro权限拦截的bean-->
    <bean id="shiroFilterMapFactory" class="cn.jiedada.aisell.web.shiro.ShiroFilterMapFactory"/>

</beans>

其实就是这一句

  <property name="filters">
            <map>
                <entry key="aisellPers" value-ref="aisellPermissionsAuthorizationFilter"></entry>
            </map>
        </property>
    </bean>
    <bean id="aisellPermissionsAuthorizationFilter" class="cn.jiedada.aisell.web.shiro.AisellPermissionsAuthorizationFilter"></bean>

然后需要把我们shrio中默认的值改为aisellPers这个为我们上面的key值

  List<Permission> permissions = permissionService.findAll();
        permissions.forEach(p->{
            map.put(p.getUrl(),"aisellPers["+p.getSn()+"]");
        });