登录拦截器 HandlerInterceptor 针对web提供的接口

为了统一区分所有请求,将所有的请求加上.do

登录,如果用户登录成功后,则生成一个随机的字符串,将字符串作为key存储在redis中。

登录拦截时,也只拦截.do请求,如果通过字符串查询到信息,则视为登录。否则未登录

增加配置 LoginInterceptorConfig, 这里设定我们要拦截的是什么,哪些拦截,哪些不拦截,特殊例外

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import com.ccjr.business.aop.LoginInterceptor;

import lombok.extern.slf4j.Slf4j;

/**
 * @Description : 登录拦截器
 * @author : Chenweixian
 * @Date : 2020年11月3日 下午6:49:09
 */
@Slf4j
@Configuration
public class LoginInterceptorConfig implements WebMvcConfigurer{
    
    @Value("${login.uriIgnore:/login/*}")
    private String LOGIN_URIIGNORE;
    @Autowired
    private LoginInterceptor interceptor;
    public static final String PATH_PATTERNS = "/*/*.do,*.do";
    
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //addPathPatterns 用于添加拦截规则
        //excludePathPatterns 用于排除拦截
        registry.addInterceptor(interceptor)
                .addPathPatterns(PATH_PATTERNS.split(","))
                .excludePathPatterns(LOGIN_URIIGNORE.split(","));
        log.info("登录拦截器注册成功!");
    }
}

 

增加拦截器 LoginInterceptor ,拦截所有的请求

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import com.ccjr.base.BaseApiService;
import com.ccjr.base.BaseResponse;
import com.ccjr.business.web.controller.BaseController;
import com.ccjr.business.web.services.LoginServices;
import com.ccjr.commons.constants.ApiErrorEnum;

import lombok.extern.slf4j.Slf4j;

/**
 * @Description : d登录拦截器
 * @Company : 晨创科技
 * @author : Chenweixian
 * @Date : 2020年11月5日 下午1:24:54
 */
@Slf4j
@Component
public class LoginInterceptor implements HandlerInterceptor {
    @Autowired
    private LoginServices loginServices;
    @Autowired
    protected StringRedisTemplate stringRedisTemplate;
    @Autowired
    protected BaseApiService baseApiService;
    
    /**
     * 在业务处理器处理请求之前被调用。预处理,可以进行编码、安全控制、权限校验等处理;
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {
        String token = request.getHeader(BaseController.LOGIN_USER_TOKEN);
        if (StringUtils.isEmpty(token)) {
            returnJson(response);
            return false;
        }
        String userInfoString = stringRedisTemplate.boundValueOps(token).get();
        if (StringUtils.isEmpty(userInfoString)) {
            returnJson(response);
            return false;
        }
        if (!StringUtils.isEmpty(token)) {
            loginServices.refreshLoginToken(token);
        }
        return true;
    }

    /**
     * 在业务处理器处理请求执行完成后,生成视图之前执行。后处理(调用了Service并返回ModelAndView,但未进行页面渲染),有机会修改ModelAndView;
     */
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
            ModelAndView modelAndView) throws Exception {
//        log.info("postHandle...");
    }

    /**
     * 在DispatcherServlet完全处理完请求后被调用,可用于清理资源等。返回处理(已经渲染了页面);
     */
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
            throws Exception {
//        log.info("afterCompletion...");
    }
    
    private void returnJson(HttpServletResponse response){
        PrintWriter writer = null;
        response.setCharacterEncoding("UTF-8");
        response.setContentType("application/json; charset=utf-8");
        try {
            BaseResponse baseResponse = baseApiService.setResultError(ApiErrorEnum.USER_LOGIN_20103);
            writer = response.getWriter();
            writer.print(baseResponse);
        } catch (IOException e){
            log.error("拦截器输出流异常",e);
        } finally {
            if(writer != null){
                writer.close();
            }
        }
    }
}

 

 

完。

posted on 2020-11-05 13:26  陈惟鲜的博客  阅读(537)  评论(0编辑  收藏  举报

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