Java秒杀实战 安全优化

Posted 2021-12-15 sharpest

转自：https://blog.csdn.net/qq_41305266/article/details/81174782

一、隐藏秒杀地址

思路：秒杀开始前，先去请求接口获取秒杀地址

1.接口改造，带上PathVariable参数

2.添加生成地址的接口

3.秒杀收到请求，先验证PathVariable

 

二、数学公式验证码

1.添加生产验证码接口

2.在获取秒杀路径的时候，验证验证码

3.ScriptEngine使用

 

package com.wings.seckill.controller;

import java.awt.image.BufferedImage;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.List;

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

import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

import com.wings.seckill.access.AccessLimit;
import com.wings.seckill.domain.SeckillOrder;
import com.wings.seckill.domain.SeckillUser;
import com.wings.seckill.rabbitmq.MQSender;
import com.wings.seckill.rabbitmq.SeckillMessage;
import com.wings.seckill.redis.GoodsKey;
import com.wings.seckill.redis.OrderKey;
import com.wings.seckill.redis.RedisService;
import com.wings.seckill.redis.SeckillKey;
import com.wings.seckill.result.CodeMsg;
import com.wings.seckill.result.Result;
import com.wings.seckill.service.GoodsService;
import com.wings.seckill.service.OrderService;
import com.wings.seckill.service.SeckillService;
import com.wings.seckill.service.SeckillUserService;
import com.wings.seckill.vo.GoodsVo;

@Controller
@RequestMapping("/seckill")
public class SeckillController implements InitializingBean

@Autowired
SeckillUserService userService;

@Autowired
RedisService redisService;

@Autowired
GoodsService goodsService;

@Autowired
OrderService orderService;

@Autowired
SeckillService seckillService;

@Autowired
MQSender sender;

private HashMap<Long, Boolean> localOverMap = new HashMap<Long, Boolean>();

@Override
public void afterPropertiesSet() throws Exception
List<GoodsVo> goodsList = goodsService.listGoodsVo();
if (goodsList == null)
return;

for (GoodsVo goods : goodsList)
redisService.set(GoodsKey.getSeckillGoodsStock, "" + goods.getId(), goods.getStockCount());
localOverMap.put(goods.getId(), false);




@RequestMapping(value = "/path/do_seckill", method = RequestMethod.POST)
@ResponseBody
public Result<Integer> list(Model model, SeckillUser user, @RequestParam("goodsId") long goodsId,
@PathVariable("path") String path)
model.addAttribute("user", user);
if (user == null)
return Result.error(CodeMsg.SESSION_ERROR);

// 验证path
boolean check = seckillService.checkPath(user, goodsId, path);
if (!check)
return Result.error(CodeMsg.REQUEST_ILLEGAL);

// 内存标记，减少redis访问
boolean over = localOverMap.get(goodsId);
if (over)
return Result.error(CodeMsg.SECKill_OVER);

// 预减库存
long stock = redisService.decr(GoodsKey.getSeckillGoodsStock, "" + goodsId);
if (stock < 0)
localOverMap.put(goodsId, true);
return Result.error(CodeMsg.SECKill_OVER);

// 判断是否已经秒杀到了
SeckillOrder order = orderService.getSeckillOrderByUserIdGoodsId(user.getId(), goodsId);
if (order != null)
return Result.error(CodeMsg.REPEATE_SECKILL);

// 入队
SeckillMessage mm = new SeckillMessage();
mm.setUser(user);
mm.setGoodsId(goodsId);
sender.sendSeckillMessage(mm);
return Result.success(0);// 排队中



@RequestMapping(value = "/reset", method = RequestMethod.GET)
@ResponseBody
public Result<Boolean> reset(Model model)
List<GoodsVo> goodsList = goodsService.listGoodsVo();
for (GoodsVo goods : goodsList)
goods.setStockCount(10);
redisService.set(GoodsKey.getSeckillGoodsStock, "" + goods.getId(), 10);
localOverMap.put(goods.getId(), false);

redisService.delete(OrderKey.getSeckillOrderByUidGid);
redisService.delete(SeckillKey.isGoodsOver);
seckillService.reset(goodsList);
return Result.success(true);


/**
* orderId：成功 -1：秒杀失败 0： 排队中
*/
@RequestMapping(value = "/result", method = RequestMethod.GET)
@ResponseBody
public Result<Long> seckillResult(Model model, SeckillUser user, @RequestParam("goodsId") long goodsId)
model.addAttribute("user", user);
if (user == null)
return Result.error(CodeMsg.SESSION_ERROR);

long result = seckillService.getSeckillResult(user.getId(), goodsId);
return Result.success(result);


@AccessLimit(seconds = 5, maxCount = 5, needLogin = true)
@RequestMapping(value = "/path", method = RequestMethod.GET)
@ResponseBody
public Result<String> getSeckillPath(HttpServletRequest request, SeckillUser user,
@RequestParam("goodsId") long goodsId,
@RequestParam(value = "verifyCode", defaultValue = "0") int verifyCode)
if (user == null)
return Result.error(CodeMsg.SESSION_ERROR);

boolean check = seckillService.checkVerifyCode(user, goodsId, verifyCode);
if (!check)
return Result.error(CodeMsg.REQUEST_ILLEGAL);

String path = seckillService.createSeckillPath(user, goodsId);
return Result.success(path);


@RequestMapping(value = "/verifyCode", method = RequestMethod.GET)
@ResponseBody
public Result<String> getSeckillVerifyCod(HttpServletResponse response, SeckillUser user,
@RequestParam("goodsId") long goodsId)
if (user == null)
return Result.error(CodeMsg.SESSION_ERROR);

try
BufferedImage image = seckillService.createVerifyCode(user, goodsId);
OutputStream out = response.getOutputStream();
ImageIO.write(image, "JPEG", out);
out.flush();
out.close();
return null;
catch (Exception e)
e.printStackTrace();
return Result.error(CodeMsg.SECKILL_FAIL);



package com.wings.seckill.service;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.util.List;
import java.util.Random;

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.wings.seckill.domain.OrderInfo;
import com.wings.seckill.domain.SeckillOrder;
import com.wings.seckill.domain.SeckillUser;
import com.wings.seckill.redis.RedisService;
import com.wings.seckill.redis.SeckillKey;
import com.wings.seckill.util.Md5Util;
import com.wings.seckill.util.UUIDUtil;
import com.wings.seckill.vo.GoodsVo;

@Service
public class SeckillService

@Autowired
GoodsService goodsService;

@Autowired
OrderService orderService;

@Autowired
RedisService redisService;

@Transactional
public OrderInfo seckill(SeckillUser user, GoodsVo goods)
// 减库存 下订单 写入秒杀订单
boolean success = goodsService.reduceStock(goods);
if (success)
// order_info maiosha_order
return orderService.createOrder(user, goods);
else
setGoodsOver(goods.getId());
return null;



public long getSeckillResult(Long userId, long goodsId)
SeckillOrder order = orderService.getSeckillOrderByUserIdGoodsId(userId, goodsId);
if (order != null) // 秒杀成功
return order.getOrderId();
else
boolean isOver = getGoodsOver(goodsId);
if (isOver)
return -1;
else
return 0;




private void setGoodsOver(Long goodsId)
redisService.set(SeckillKey.isGoodsOver, "" + goodsId, true);


private boolean getGoodsOver(long goodsId)
return redisService.exists(SeckillKey.isGoodsOver, "" + goodsId);


public void reset(List<GoodsVo> goodsList)
goodsService.resetStock(goodsList);
orderService.deleteOrders();


public boolean checkPath(SeckillUser user, long goodsId, String path)
if (user == null || path == null)
return false;

String pathOld = redisService.get(SeckillKey.getSeckillPath, "" + user.getId() + "_" + goodsId, String.class);
return path.equals(pathOld);


public String createSeckillPath(SeckillUser user, long goodsId)
if (user == null || goodsId <= 0)
return null;

String str = Md5Util.md5(UUIDUtil.uuid() + "123456");
redisService.set(SeckillKey.getSeckillPath, "" + user.getId() + "_" + goodsId, str);
return str;


public BufferedImage createVerifyCode(SeckillUser user, long goodsId)
if (user == null || goodsId <= 0)
return null;

int width = 80;
int height = 32;
// create the image
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics g = image.getGraphics();
// set the background color
g.setColor(new Color(0xDCDCDC));
g.fillRect(0, 0, width, height);
// draw the border
g.setColor(Color.black);
g.drawRect(0, 0, width - 1, height - 1);
// create a random instance to generate the codes
Random rdm = new Random();
// make some confusion
for (int i = 0; i < 50; i++)
int x = rdm.nextInt(width);
int y = rdm.nextInt(height);
g.drawOval(x, y, 0, 0);

// generate a random code
String verifyCode = generateVerifyCode(rdm);
g.setColor(new Color(0, 100, 0));
g.setFont(new Font("Candara", Font.BOLD, 24));
g.drawString(verifyCode, 8, 24);
g.dispose();
// 把验证码存到redis中
int rnd = calc(verifyCode);
redisService.set(SeckillKey.getSeckillVerifyCode, user.getId() + "," + goodsId, rnd);
// 输出图片
return image;


public boolean checkVerifyCode(SeckillUser user, long goodsId, int verifyCode)
if (user == null || goodsId <= 0)
return false;

Integer codeOld = redisService.get(SeckillKey.getSeckillVerifyCode, user.getId() + "," + goodsId,
Integer.class);
if (codeOld == null || codeOld - verifyCode != 0)
return false;

redisService.delete(SeckillKey.getSeckillVerifyCode, user.getId() + "," + goodsId);
return true;


private static int calc(String exp)
try
ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("javascript");
return (Integer) engine.eval(exp);
catch (Exception e)
e.printStackTrace();
return 0;



private static char[] ops = new char[] ‘+‘, ‘-‘, ‘*‘ ;

/**
* + - *
*/
private String generateVerifyCode(Random rdm)
int num1 = rdm.nextInt(10);
int num2 = rdm.nextInt(10);
int num3 = rdm.nextInt(10);
char op1 = ops[rdm.nextInt(3)];
char op2 = ops[rdm.nextInt(3)];
String exp = "" + num1 + op1 + num2 + op2 + num3;
return exp;


<!DOCTYPE html>
<html >
<head>
<title>商品详情</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<!-- jquery -->
<script type="text/javascript" src="/js/jquery.min.js"></script>
<!-- bootstrap -->
<link rel="stylesheet" type="text/css" href="/bootstrap/css/bootstrap.min.css" />
<script type="text/javascript" src="/bootstrap/js/bootstrap.min.js"></script>
<!-- jquery-validator -->
<script type="text/javascript" src="/jquery-validation/jquery.validate.min.js"></script>
<script type="text/javascript" src="/jquery-validation/localization/messages_zh.min.js"></script>
<!-- layer -->
<script type="text/javascript" src="/layer/layer.js"></script>
<!-- md5.js -->
<script type="text/javascript" src="/js/md5.min.js"></script>
<!-- common.js -->
<script type="text/javascript" src="/js/common.js"></script>
<style type="text/css">
html,body
height:100%;
width:100%;

body
background:url(‘/img/bg2.jpg‘) no-repeat;
background-size:100% 100%;

#goodslist td
border-top:1px solid #39503f61;

</style>
</head>
<body>

<div class="panel panel-default" style="height:100%;background-color:rgba(222,222,222,0.8)" >
<div class="panel-heading">秒杀商品详情</div>
<div class="panel-body">
<span id="userTip"> 您还没有登录，请登陆后再操作<br/></span>
<span>没有收货地址的提示。。。</span>
</div>
<table class="table" id="goodslist">
<tr>
<td>商品名称</td>
<td colspan="3" id="goodsName"></td>
</tr>
<tr>
<td>商品图片</td>
<td colspan="3"><img id="goodsImg" width="200" height="200" /></td>
</tr>
<tr>
<td>秒杀开始时间</td>
<td id="startTime"></td>
<td >
<input type="hidden" id="remainSeconds" />
<span id="seckillTip"></span>
</td>
<td>
<!--
<form id="seckillForm" method="post" action="/seckill/do_seckill">
<button class="btn btn-primary btn-block" type="submit" id="buyButton">立即秒杀</button>
<input type="hidden" name="goodsId" id="goodsId" />
</form>-->
<div class="row">
<div class="form-inline">
<img id="verifyCodeImg" width="80" height="32" style="display:none" onclick="refreshVerifyCode()"/>
<input id="verifyCode" class="form-control" style="display:none"/>
<button class="btn btn-primary" type="button" id="buyButton"onclick="getSeckillPath()">立即秒杀</button>
</div>
</div>
<input type="hidden" name="goodsId" id="goodsId" />
</td>
</tr>
<tr>
<td>商品原价</td>
<td colspan="3" id="goodsPrice"></td>
</tr>
<tr>
<td>秒杀价</td>
<td colspan="3" id="seckillPrice"></td>
</tr>
<tr>
<td>库存数量</td>
<td colspan="3" id="stockCount"></td>
</tr>
</table>
</div>
</body>
<script>

function getSeckillPath()
var goodsId = $("#goodsId").val();
g_showLoading();
$.ajax(
url:"/seckill/path",
type:"GET",
data:
goodsId:goodsId,
verifyCode:$("#verifyCode").val()
,
success:function(data)
if(data.code == 0)
var path = data.data;
doSeckill(path);
else
layer.msg(data.msg);

,
error:function()
layer.msg("客户端请求有误");

);


function getSeckillResult(goodsId)
g_showLoading();
$.ajax(
url:"/seckill/result",
type:"GET",
data:
goodsId:$("#goodsId").val(),
,
success:function(data)
if(data.code == 0)
var result = data.data;
if(result < 0)
layer.msg("对不起，秒杀失败");
else if(result == 0)//继续轮询
setTimeout(function()
getSeckillResult(goodsId);
, 200);
else
layer.confirm("恭喜你，秒杀成功！查看订单？", btn:["确定","取消"],
function()
window.location.href="/order_detail.htm?orderId="+result;
,
function()
layer.closeAll();
);

else
layer.msg(data.msg);

,
error:function()
layer.msg("客户端请求有误");

);


function doSeckill(path)
$.ajax(
url:"/seckill/"+path+"/do_seckill",
type:"POST",
data:
goodsId:$("#goodsId").val()
,
success:function(data)
if(data.code == 0)
//window.location.href="/order_detail.htm?orderId="+data.data.id;
getSeckillResult($("#goodsId").val());
else
layer.msg(data.msg);

,
error:function()
layer.msg("客户端请求有误");

);



function render(detail)
var seckillStatus = detail.seckillStatus;
var remainSeconds = detail.remainSeconds;
var goods = detail.goods;
var user = detail.user;
if(user)
$("#userTip").hide();

$("#goodsName").text(goods.goodsName);
$("#goodsImg").attr("src", goods.goodsImg);
$("#startTime").text(new Date(goods.startDate).format("yyyy-MM-dd hh:mm:ss"));
$("#remainSeconds").val(remainSeconds);
$("#goodsId").val(goods.id);
$("#goodsPrice").text(goods.goodsPrice);
$("#seckillPrice").text(goods.seckillPrice);
$("#stockCount").text(goods.stockCount);
countDown();


$(function()
//countDown();
getDetail();
);

function getDetail()
var goodsId = g_getQueryString("goodsId");
$.ajax(
url:"/goods/detail/"+goodsId,
type:"GET",
success:function(data)
if(data.code == 0)
render(data.data);
else
layer.msg(data.msg);

,
error:function()
layer.msg("客户端请求有误");

);


function countDown()
var remainSeconds = $("#remainSeconds").val();
var timeout;
if(remainSeconds > 0)//秒杀还没开始，倒计时
$("#buyButton").attr("disabled", true);
$("#seckillTip").html("秒杀倒计时："+remainSeconds+"秒");
timeout = setTimeout(function()
$("#countDown").text(remainSeconds - 1);
$("#remainSeconds").val(remainSeconds - 1);
countDown();
,1000);
else if(remainSeconds == 0)//秒杀进行中
$("#buyButton").attr("disabled", false);
if(timeout)
clearTimeout(timeout);

$("#seckillTip").html("秒杀进行中");
$("#verifyCodeImg").attr("src", "/seckill/verifyCode?goodsId="+$("#goodsId").val());
$("#verifyCodeImg").show();
$("#verifyCode").show();
else//秒杀已经结束
$("#buyButton").attr("disabled", true);
$("#seckillTip").html("秒杀已经结束");
$("#verifyCodeImg").hide();
$("#verifyCode").hide();


function refreshVerifyCode()
$("#verifyCodeImg").attr("src", "/seckill/verifyCode?goodsId="+$("#goodsId").val()+"&timestamp="+new Date().getTime());

</script>
</html>
 

三、接口防刷

思路：对接口做限流

1.可以用拦截器减少对业务侵入

 

package com.wings.seckill.access;

import com.wings.seckill.domain.SeckillUser;

public class UserContext

private static ThreadLocal<SeckillUser> userHolder = new ThreadLocal<SeckillUser>();

public static void setUser(SeckillUser user)
userHolder.set(user);


public static SeckillUser getUser()
return userHolder.get();



package com.wings.seckill.access;

import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

import java.lang.annotation.Retention;
import java.lang.annotation.Target;

@Retention(RUNTIME)
@Target(METHOD)
public @interface AccessLimit
int seconds();
int maxCount();
boolean needLogin() default true;

package com.wings.seckill.access;

import java.io.OutputStream;

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

import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import com.alibaba.fastjson.JSON;
import com.wings.seckill.domain.SeckillUser;
import com.wings.seckill.redis.AccessKey;
import com.wings.seckill.redis.RedisService;
import com.wings.seckill.result.CodeMsg;
import com.wings.seckill.result.Result;
import com.wings.seckill.service.SeckillUserService;

@Service
public class AccessInterceptor extends HandlerInterceptorAdapter

@Autowired
SeckillUserService userService;

@Autowired
RedisService redisService;

@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception
if(handler instanceof HandlerMethod)
SeckillUser user = getUser(request, response);
UserContext.setUser(user);
HandlerMethod hm = (HandlerMethod)handler;
AccessLimit accessLimit = hm.getMethodAnnotation(AccessLimit.class);
if(accessLimit == null)
return true;

int seconds = accessLimit.seconds();
int maxCount = accessLimit.maxCount();
boolean needLogin = accessLimit.needLogin();
String key = request.getRequestURI();
if(needLogin)
if(user == null)
render(response, CodeMsg.SESSION_ERROR);
return false;

key += "_" + user.getId();
else
//do nothing

AccessKey ak = AccessKey.withExpire(seconds);
Integer count = redisService.get(ak, key, Integer.class);
if(count == null)
redisService.set(ak, key, 1);
else if(count < maxCount)
redisService.incr(ak, key);
else
render(response, CodeMsg.ACCESS_LIMIT_REACHED);
return false;


return true;


private void render(HttpServletResponse response, CodeMsg cm)throws Exception
response.setContentType("application/json;charset=UTF-8");
OutputStream out = response.getOutputStream();
String str = JSON.toJSONString(Result.error(cm));
out.write(str.getBytes("UTF-8"));
out.flush();
out.close();


private SeckillUser getUser(HttpServletRequest request, HttpServletResponse response)
String paramToken = request.getParameter(SeckillUserService.COOKIE_TOKEN_NAME);
String cookieToken = getCookieValue(request, SeckillUserService.COOKIE_TOKEN_NAME);
if(StringUtils.isEmpty(cookieToken) && StringUtils.isEmpty(paramToken))
return null;

String token = StringUtils.isEmpty(paramToken)?cookieToken:paramToken;
return userService.getByToken( token, response);


private String getCookieValue(HttpServletRequest request, String cookiName)
Cookie[] cookies = request.getCookies();
if(cookies == null || cookies.length <= 0)
return null;

for(Cookie cookie : cookies)
if(cookie.getName().equals(cookiName))
return cookie.getValue();


return null;



package com.wings.seckill.config;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

import com.wings.seckill.access.AccessInterceptor;

@Configuration
public class WebConfig extends WebMvcConfigurerAdapter

@Autowired
private UserArgumentResolver userArgumentResolver;

@Autowired
AccessInterceptor accessInterceptor;

@Override
public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers)
argumentResolvers.add(userArgumentResolver);


@Override
public void addInterceptors(InterceptorRegistry registry)
registry.addInterceptor(accessInterceptor);


 

 
---------------------
作者：插上小翅膀的程序猿Wings
来源：CSDN
原文：https://blog.csdn.net/qq_41305266/article/details/81174782
版权声明：本文为博主原创文章，转载请附上博文链接！