[移动开发] 秒杀项目之验证功能

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[移动开发]秒杀项目之验证功能

一、用户验证

?完成必须登录才能进入商品展示界面

1、给findByAccount方法增加 request, response两个参数：
cookie储存用户信息

（1）导入帮助类

①、CookieUtils

package com.hmf.seckill.util;

import lombok.extern.slf4j.Slf4j;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;

@Slf4j
public class CookieUtils {

    /**
     * @Description: 得到Cookie的值, 不编码
     */
    public static String getCookieValue(HttpServletRequest request, String cookieName) {
        return getCookieValue(request, cookieName, false);
    }

    /**
     * @Description: 得到Cookie的值
     */
    public static String getCookieValue(HttpServletRequest request, String cookieName, boolean isDecoder) {
        Cookie[] cookieList = request.getCookies();
        if (cookieList == null || cookieName == null) {
            return null;
        }
        String retValue = null;
        try {
            for (int i = 0; i < cookieList.length; i++) {
                if (cookieList[i].getName().equals(cookieName)) {
                    if (isDecoder) {
                        retValue = URLDecoder.decode(cookieList[i].getValue(), "UTF-8");
                    } else {
                        retValue = cookieList[i].getValue();
                    }
                    break;
                }
            }
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return retValue;
    }

    /**
     * @Description: 得到Cookie的值
     */
    public static String getCookieValue(HttpServletRequest request, String cookieName, String encodeString) {
        Cookie[] cookieList = request.getCookies();
        if (cookieList == null || cookieName == null) {
            return null;
        }
        String retValue = null;
        try {
            for (int i = 0; i < cookieList.length; i++) {
                if (cookieList[i].getName().equals(cookieName)) {
                    retValue = URLDecoder.decode(cookieList[i].getValue(), encodeString);
                    break;
                }
            }
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return retValue;
    }

    /**
     * @Description: 设置Cookie的值 不设置生效时间默认浏览器关闭即失效,也不编码
     */
    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue) {
        setCookie(request, response, cookieName, cookieValue, -1);
    }

    /**
     * @Description: 设置Cookie的值 在指定时间内生效,但不编码
     */
    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage) {
        setCookie(request, response, cookieName, cookieValue, cookieMaxage, false);
    }

    /**
     * @Description: 设置Cookie的值 不设置生效时间,但编码
     * 在服务器被创建，返回给客户端，并且保存客户端
     * 如果设置了SETMAXAGE(int seconds)，会把cookie保存在客户端的硬盘中
     * 如果没有设置，会默认把cookie保存在浏览器的内存中
     * 一旦设置setPath()：只能通过设置的路径才能获取到当前的cookie信息
     */
    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
                                 String cookieValue, boolean isEncode) {
        setCookie(request, response, cookieName, cookieValue, -1, isEncode);
    }

    /**
     * @Description: 设置Cookie的值 在指定时间内生效, 编码参数
     */
    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage, boolean isEncode) {
        doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, isEncode);
    }

    /**
     * @Description: 设置Cookie的值 在指定时间内生效, 编码参数(指定编码)
     */
    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
                                 String cookieValue, int cookieMaxage, String encodeString) {
        doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, encodeString);
    }

    /**
     * @Description: 删除Cookie带cookie域名
     */
    public static void deleteCookie(HttpServletRequest request, HttpServletResponse response,
                                    String cookieName) {
        doSetCookie(request, response, cookieName, null, -1, false);
    }


    /**
     * @Description: 设置Cookie的值，并使其在指定时间内生效
     */
    private static final void doSetCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage, boolean isEncode) {
        try {
            if (cookieValue == null) {
                cookieValue = "";
            } else if (isEncode) {
                cookieValue = URLEncoder.encode(cookieValue, "utf-8");
            }
            Cookie cookie = new Cookie(cookieName, cookieValue);
            if (cookieMaxage > 0)
                cookie.setMaxAge(cookieMaxage);
            if (null != request) {// 设置域名的cookie
                String domainName = getDomainName(request);
                log.info("========== domainName: {} ==========", domainName);
                if (!"localhost".equals(domainName)) {
                    cookie.setDomain(domainName);
                }
            }
            cookie.setPath("/");
            response.addCookie(cookie);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * @Description: 设置Cookie的值，并使其在指定时间内生效
     */
    private static final void doSetCookie(HttpServletRequest request, HttpServletResponse response,
                                          String cookieName, String cookieValue, int cookieMaxage, String encodeString) {
        try {
            if (cookieValue == null) {
                cookieValue = "";
            } else {
                cookieValue = URLEncoder.encode(cookieValue, encodeString);
            }
            Cookie cookie = new Cookie(cookieName, cookieValue);
            if (cookieMaxage > 0)
                cookie.setMaxAge(cookieMaxage);
            if (null != request) {// 设置域名的cookie
                String domainName = getDomainName(request);
                log.info("========== domainName: {} ==========", domainName);
                if (!"localhost".equals(domainName)) {
                    cookie.setDomain(domainName);
                }
            }
            cookie.setPath("/");
            response.addCookie(cookie);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * @Description: 得到cookie的域名
     */
    private static final String getDomainName(HttpServletRequest request) {
        String domainName = null;

        String serverName = request.getRequestURL().toString();
        if (serverName == null || serverName.equals("")) {
            domainName = "";
        } else {
            serverName = serverName.toLowerCase();
            serverName = serverName.substring(7);
            final int end = serverName.indexOf("/");
            serverName = serverName.substring(0, end);
            if (serverName.indexOf(":") > 0) {
                String[] ary = serverName.split("\\:");
                serverName = ary[0];
            }

            final String[] domains = serverName.split("\\.");
            int len = domains.length;
            if (len > 3 && !isIp(serverName)) {
                // www.xxx.com.cn
                domainName = "." + domains[len - 3] + "." + domains[len - 2] + "." + domains[len - 1];
            } else if (len <= 3 && len > 1) {
                // xxx.com or xxx.cn
                domainName = "." + domains[len - 2] + "." + domains[len - 1];
            } else {
                domainName = serverName;
            }
        }
        return domainName;
    }

    public static String trimSpaces(String IP) {//去掉IP字符串前后所有的空格
        while (IP.startsWith(" ")) {
            IP = IP.substring(1, IP.length()).trim();
        }
        while (IP.endsWith(" ")) {
            IP = IP.substring(0, IP.length() - 1).trim();
        }
        return IP;
    }

    public static boolean isIp(String IP) {//判断是否是一个IP
        boolean b = false;
        IP = trimSpaces(IP);
        if (IP.matches("\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}")) {
            String s[] = IP.split("\\.");
            if (Integer.parseInt(s[0]) < 255)
                if (Integer.parseInt(s[1]) < 255)
                    if (Integer.parseInt(s[2]) < 255)
                        if (Integer.parseInt(s[3]) < 255)
                            b = true;
        }
        return b;
    }
}

（2）修改UserServiceImpl

package com.hmf.seckill.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.hmf.seckill.exception.BusinessException;
import com.hmf.seckill.pojo.User;
import com.hmf.seckill.mapper.UserMapper;
import com.hmf.seckill.service.IUserService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmf.seckill.util.CookieUtils;
import com.hmf.seckill.util.MD5Utils;
import com.hmf.seckill.util.ValidatorUtils;
import com.hmf.seckill.util.response.ResponseResult;
import com.hmf.seckill.util.response.ResponseResultCode;
import com.hmf.seckill.vo.UserVo;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Date;
import java.util.UUID;

/**
 * <p>
 * 用户信息表 服务实现类
 * </p>
 *
 * @author hmf-git
 * @since 2022-03-15
 */
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

    @Override
    public ResponseResult<?> findByAccount(UserVo userVo, HttpServletRequest request, HttpServletResponse response) {
        //先判断信息是否符合
        if(!ValidatorUtils.isMobile(userVo.getMobile())){
            throw new BusinessException(ResponseResultCode.USER_ACCOUNT_NOT_MOBLIE);
        }
        if(StringUtils.isBlank(userVo.getPassword())){
            throw new BusinessException(ResponseResultCode.USER_ACCOUNT_NOT_MOBLIE);
        }
        //再看数据库查出对应的用户
        User user=this.getOne(new QueryWrapper<User>().eq("id",userVo.getMobile()));
        if(user==null){
            throw new BusinessException(ResponseResultCode.USER_ACCOUNT_NOT_FIND);
        }
        //在比较密码
        //二重加密
        String salt=user.getSalt();
        String newPassword=MD5Utils.formPassToDbPass(userVo.getPassword(),salt);
        //将前台的加密和后端的盐再次加密
        if(!newPassword.equals(user.getPassword())) {
            throw new BusinessException(ResponseResultCode.USER_PASSWORD_NOT_MATCH);
        }
        this.update(new UpdateWrapper<User>().eq("id",userVo.getMobile()).set("last_login_date",new Date()).setSql("login_count=login_count+1"));
        //最初的版本(session:全局共用,uuid:不可能重复)
        String ticket = UUID.randomUUID().toString().replace("-", "");
//        request.getSession().setAttribute("user",user);
        request.getSession().setAttribute(ticket,user);
//        将我生成的ticket给用户，用户如何验证？  使用cookie，cookie在客户端，session在服务端
//        Cookie cookie=new Cookie("ticket",ticket);
//        response.addCookie(cookie);   这样写会导致设置时间麻烦
        CookieUtils.setCookie(request,response,"ticket",ticket);
        return ResponseResult.success();
    }

}

运行测试

3、页面跳转判断

除了登录页面不需要身份验证，其他页面都需要身份验证

（1）修改PathController

package com.hmf.seckill.controller;

import com.hmf.seckill.exception.BusinessException;
import com.hmf.seckill.util.CookieUtils;
import com.hmf.seckill.util.response.ResponseResultCode;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;

@Controller
public class PathController {

    //跳首页
    @RequestMapping("/")
    public String toPath(){
        return "login";
    }

    //跳二级页面
    @RequestMapping("/{dir}/{path}")
    public String toPath(@PathVariable("dir") String dir, @PathVariable("path") String path, HttpServletRequest request){
        String ticket= CookieUtils.getCookieValue(request,"ticket");
//       进行页面跳转之前判断用户带过来的信息是否有效
        if(ticket==null){
//            没有带信息，抛出业务异常,ticket凭据异常
            throw new BusinessException(ResponseResultCode.TICKET_ERROR);
        }
//        去session中取到ticket对应的用户，判断是否有值
        Object obj = request.getSession().getAttribute(ticket);
        if(obj==null){
//            凭据没获得取到，要么是已失效，同样抛出凭证异常
            throw new BusinessException(ResponseResultCode.TICKET_ERROR);
        }
        //处理操作
        return dir+"/"+path;
    }
}

（2）运行测试

二、redis缓存完成全局session

现在的session还是有问题的，只存在一个服务器中，如果搭建了集群，只有第一个A获得凭证的才能访问，后面的获取不到,同时也访问不到，

1、redis缓存完成session共享

（1）需要第三者（redis缓存），将凭证放入第三者中，需要就去拿

（2）导入pom依赖

? ? ? ? 
? ? ? ? <dependency>
? ? ? ? ? ? <groupId>org.apache.commons</groupId>
? ? ? ? ? ? <artifactId>commons-pool2</artifactId>
? ? ? ? </dependency>
? ? ? ? 
? ? ? ? <dependency>
? ? ? ? ? ? <groupId>org.springframework.session</groupId>
? ? ? ? ? ? <artifactId>spring-session-data-redis</artifactId>
? ? ? ? </dependency>

（3）配置redis缓存

①、application.yml