shiro用ajax方式登录

来源：互联网发布：ipcms录像软件编辑：程序博客网时间：2024/06/01 21:39

原文来自：http://blog.csdn.net/u013632755/article/details/51485158 感谢博主的分享

用了shiro一段时间了，但是有点受不了它请求登录如果验证不通过直接跳的是loginUrl…所以我想很多人想用ajax实现shiro的登录直接在回调函数里面通过js显示出错信息吧。

今天查了一天的资料，结合了别人写的文章，自己也写了这个博客。好了，直接进入主题吧~

首先我们知道shiro主要是通过过滤器来实现权限的验证的，你可以继承各种各样的filter来进行扩展。这里我们实现ajax是通过继承FormAuthenticationFilter来的。下面这个类实现了如果是ajax请求则直接处理登录之后直接将信息通过response返回给客户端，如果是其它请求则直接用的源代码执行下去的，只是把源代码copy到重写的方法里面的而已。具体的可以看源码就会清楚的哦~如下：

package com.sh.ddyc.shiro.filter;import com.sh.ddyc.constant.Constant;import com.sh.ddyc.data.mapper.DUserMapper;import com.sh.ddyc.dto.UserDto;import org.apache.shiro.authc.AuthenticationException;import org.apache.shiro.authc.AuthenticationToken;import org.apache.shiro.subject.Subject;import org.apache.shiro.web.filter.authc.FormAuthenticationFilter;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Autowired;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;import java.io.PrintWriter;import java.util.HashMap;import java.util.Map;public class ExtendFormAuthenticationFilter extends FormAuthenticationFilter {    private static final Logger log = LoggerFactory.getLogger(FormAuthenticationFilter.class);    @Autowired    DUserMapper userMapper;    /**     * 表示当访问拒绝时     * @param request     * @param response     * @return     * @throws Exception     */    @Override    protected boolean onAccessDenied(ServletRequest request, ServletResponse response) throws Exception {        if(this.isLoginRequest(request, response)) {            if(this.isLoginSubmission(request, response)) {                if(log.isTraceEnabled()) {                    log.trace("Login submission detected.  Attempting to execute login.");                }                return this.executeLogin(request, response);            } else {                if(log.isTraceEnabled()) {                    log.trace("Login page view.");                }                return true;            }        } else {            if(log.isTraceEnabled()) {                log.trace("Attempting to access a path which requires authentication.  Forwarding to the Authentication url [" + this.getLoginUrl() + "]");            }            this.saveRequestAndRedirectToLogin(request, response);            return false;        }    }    /**     * 当登录成功     * @param token     * @param subject     * @param request     * @param response     * @return     * @throws Exception     */    @Override    protected boolean onLoginSuccess(AuthenticationToken token, Subject subject, ServletRequest request, ServletResponse response) throws Exception {        //将user对象放入session，这里你可能用不到，可以删除        Map<String,String> params = new HashMap<String,String>();        params.put("username",token.getPrincipal().toString());        UserDto userDto = userMapper.findUserDto(params);        //----------以上代码你可以删除-------------------        ((HttpServletRequest)request).getSession().setAttribute(Constant.CURRENT_USER,userDto);        HttpServletRequest httpServletRequest = (HttpServletRequest) request;        HttpServletResponse httpServletResponse = (HttpServletResponse) response;        if (!"XMLHttpRequest".equalsIgnoreCase(httpServletRequest                .getHeader("X-Requested-With"))) {// 不是ajax请求            issueSuccessRedirect(request, response);        } else {            httpServletResponse.setCharacterEncoding("UTF-8");            PrintWriter out = httpServletResponse.getWriter();            out.println("{\"success\":true,\"message\":\"登入成功\"}");            out.flush();            out.close();        }        return false;    }    /**     * 当登录失败     * @param token     * @param e     * @param request     * @param response     * @return     */    @Override    protected boolean onLoginFailure(AuthenticationToken token, AuthenticationException e, ServletRequest request, ServletResponse response) {        if (!"XMLHttpRequest".equalsIgnoreCase(((HttpServletRequest) request)                .getHeader("X-Requested-With"))) {// 不是ajax请求            setFailureAttribute(request, e);            return true;        }        try {            response.setCharacterEncoding("UTF-8");            PrintWriter out = response.getWriter();            String message = e.getClass().getSimpleName();            if ("IncorrectCredentialsException".equals(message)) {                out.println("{\"success\":false,\"message\":\"密码错误\"}");            } else if ("UnknownAccountException".equals(message)) {                out.println("{\"success\":false,\"message\":\"账号不存在\"}");            } else if ("LockedAccountException".equals(message)) {                out.println("{\"success\":false,\"message\":\"账号被锁定\"}");            } else {                out.println("{\"success\":false,\"message\":\"未知错误\"}");            }            out.flush();            out.close();        } catch (IOException e1) {            // TODO Auto-generated catch block            e1.printStackTrace();        }        return false;    }}1
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上面这个类的onAccessDenied()方法表示当访问拒绝时是否已经处理了；如果返回true表示需要继续处理；如果返回false表示该拦截器实例已经处理了，将直接返回即可。onLoginSuccess()方法是登录成功时调用。onLoginFailure()方法是登录失败时调用。
下面是onAccessDenied()方法里面的this.executeLogin(request, response);这行代码的源码：
这里写图片描述
可以看出这个方法执行了subject的login()方法登录然后如果登录成功则调用的onLoginSuccess(),如果报错则调用的onLoginFailure()。

好啦，关键的部分讲完了，接下来就是xml的配置了。
喽~

<!-- 继承FormAuthenticationFilter基于Form表单的身份验证过滤器，用于扩展 -->       <bean id="formAuthenticationFilter" class="com.sh.ddyc.shiro.filter.ExtendFormAuthenticationFilter">              <property name="usernameParam" value="username"/>              <property name="passwordParam" value="password"/>              <property name="rememberMeParam" value="rememberMe"/>              <property name="loginUrl" value="/login"/>       </bean>       <!-- Shiro的Web过滤器 -->       <bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">              <property name="securityManager" ref="securityManager"/>              <property name="loginUrl" value="/login"/>              <property name="successUrl" value="/index" />              <property name="filters">                     <util:map>                            <entry key="authc" value-ref="formAuthenticationFilter"/>                            <entry key="kickout" value-ref="kickoutSessionControlFilter"/>                     </util:map>              </property>              <property name="filterChainDefinitions">                     <value>                            /login = authc                            /index.jsp = anon                            /*/register* = anon                            /logout = logout                            /static/** = anon                            /assets/** = anon                            /image/** = anon                            /images/** = anon                            /** = kickout,authc                     </value>              </property>       </bean>1
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接下来，你就可以直接在客户端用js请求login了~
这里写图片描述

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