app互斥登录,只能登录一个.

思路:

1.手机app的每一次请求都携带参数(每个手机的唯一设备号),放在请求头中.当app登录成功之后,获取参数存到数据库中.

2.添加拦截器,获取请求头里面的唯一设备号,如果和当前登陆者数据库里面的一致,则通过,否则返回false,提示设备已经登录.

拦截器配置:

<mvc:interceptors>
    <!-- 放sql注入攻击防御 -->
    <mvc:interceptor>
        <!-- 需拦截的地址 -->
        <mvc:mapping path="/**" />
        <!-- 需排除拦截的地址 -->
        <mvc:exclude-mapping path="/resources/**" />
        <mvc:exclude-mapping path="/api/auth/cas-app/login" />
        <mvc:exclude-mapping path="/auth/cas-app/login" />
        <bean class="com.boeryun.interceptor.AppMutexInterceptor" />
    </mvc:interceptor>
</mvc:interceptors>

拦截器:

public class AppMutexInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object o) throws Exception {
        if(("android".equals(Global.getRequest().getHeader("DEVICE-USER-AGENT")) || "ios".equals(Global.getRequest().getHeader("DEVICE-USER-AGENT")))){
            String  deviceNumber  =  Global.getRequest().getHeader("deviceNumber");
            String sql = MessageFormat.format(" select deviceModel from {0} where uuid =''{1}'' ",
                    DbHelper.getTableName("base_staff"),Global.getUserId());
            if(DbHelper.getScalar(sql)!=null && DbHelper.getScalar(sql).toString().equals(deviceNumber) ){
                return true;
            }else{
//                response.setHeader("Content-Type", "text/html;charset=UTF-8");
                response.setCharacterEncoding("UTF-8");
                response.setContentType("application/json; charset=utf-8");
                JSONObject map = new JSONObject();
                map.put("Status", "502");
                map.put("Message","您的账号在另外一台设备登录!");
                response.getWriter().append(map.toString());
                return false;
            }
        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

    }
}