PHP商品秒杀功能实现思路分析
https://blog.csdn.net/weixin_41380972/article/details/86242066
用户: 超大量, 正常/坏人
地域: 全国各地 [因为全国各地不同, 因此需要用cdn将服务发送到离用户最近的那个服务器]
业务流程: [前台]商品展示, 登记, [后台]数据输入, 数据处理
以下为架构方案 :
分为两个大层
一 用户比较关心, 用户看的见的层
1 商品展示层/页
2 用户登记层
二 后台层 / 数据持久化层
1 数据接入层
2 后续处理层
分层详解
一 页面状态
1 商品展示: 秒杀倒计时页面
2 秒杀进行中: 点击进入秒杀页面
3 秒杀活动结束: 提示活动已经结束
从用户的角度看 :
秒杀倒计时和秒杀开始是利用ｌｉｎｕｘ定时任务和ｓｈｅｌｌ脚本来做
秒杀进行中到秒杀结束是利用ｐｈｐ处理对应的服务器程序来做
二 页面状态
1 秒杀进行中： 秒杀登记页面
2 秒杀结束: 秒杀结束页面
流程图
数据持久化层
数据校验: 完成对数据 / 用户验证 (加密解密算法)
存入nosql队列: 去重复 / 排序数据 (redis有序集合)
检测商品最大数量: 提示活动已经结束 (技术标志位)
页面功能
数据持久化: 转存nosql数据到mysql数据库
干货
第一层: 商品展示层
知识点: 页面 / 服务器优化, cdn忘了加速, 隐藏跳转界面, 状态切换
linux 页面切换:
#!/bin/bash
# 看一下我们的shell脚本是否正常执行
date >> /var/www/ms/log.txt
#### 页面切换 ####
# 删除index.html秒杀等待页面
rm -rf '/var/www/ms/first.html'
# 将秒杀开始页面切换到秒杀等待页面
cp '/var/www/ms/first_begin.html' '/var/www/ms/first.html'
linux定时任务:
*/1 * * * * root /bin/51miao.sh #执行秒杀页面的定时任务代码
第二层: 秒杀进行和秒杀结束切换:
<?php
// 第一步：删除文件
$file_path = 'first.html';
$f = file_exists($file_path) && unlink($file_path);
$file_path = 'second.html';
$f = file_exists($file_path) && unlink($file_path);
// 第二步：生成自己需要的文件
$file_path = 'first.html';
$myfile = fopen($file_path, "w");
// 获取文件内容
$file_path = 'first_over.html';
$txt = file_get_contents($file_path);
fwrite($myfile, $txt);
$file_path = 'second.html';
$myfile = fopen($file_path, "w");
fwrite($myfile, $txt);
用户登记层
知识点: token加 / 解密, ajax跨域
$(function(){
//var url = 'http://www.maizi.net/miao%20sha%20prepare/level%203/';
//var url = 'http://www.miaosha_level3.net/';
var url = 'http://level3.5ihy.com/';
//check函数验证了手机号, 会员
function check(myphone,mynumber){
// TODO 添加你的检验规则
// 检测 手机号
var myphone_reg = /^(13[0-9]|15[7-9]|153|156|18[7-9])[0-9]{8}$/;
var myphone_reg_test = myphone_reg.test(myphone);
if(myphone_reg_test){
return true;
}
alert('你是输入信息有误');
return false;
}
/**** 跨域操作 ****/
$("#qianggou").click(function(){
var myphone = $("#myphone").val();
var mynumber = $("#mynumber").val();
var data = {'phone':myphone, 'number':mynumber};
var res = check(myphone,mynumber);
if(res){
$.ajax({
url:url,
data:data,
dataType:'jsonp',
jsonp:'callback',//传递给请求处理程序或页面的，用以获得jsonp回调函数名的参数名(默认为:callback)
jsonpCallback:"success_jsonpCallback",//自定义的jsonp回调函数名称，默认为jQuery自动生成的随机函数名
success:function(cc){
if(cc.msg=='ok'){
$.cookie('miao','ok');
}
},
error:function(){
$.cookie('miao',null);
},
timeout:300
});
}
});
// 检测是否秒杀了
var miao = $.cookie('miao');
//alert(miao);
if(miao){
alert('你已经成功登记');
//$("#qianggou").remove();
}
});
jquery的cookie封装
/**
* Cookie plugin
* Resources from http://down.liehuo.net
* Copyright (c) 2006 Klaus Hartl (stilbuero.de)
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*
*/
/**
* Create a cookie with the given name and value and other optional parameters.
*
* @example $.cookie('the_cookie', 'the_value');
* @desc Set the value of a cookie.
* @example $.cookie('the_cookie', 'the_value', { expires: 7, path: '/', domain: 'jquery.com', secure: true });
* @desc Create a cookie with all available options.
* @example $.cookie('the_cookie', 'the_value');
* @desc Create a session cookie.
* @example $.cookie('the_cookie', null);
* @desc Delete a cookie by passing null as value. Keep in mind that you have to use the same path and domain
* used when the cookie was set.
*
* @param String name The name of the cookie.
* @param String value The value of the cookie.
* @param Object options An object literal containing key/value pairs to provide optional cookie attributes.
* @option Number|Date expires Either an integer specifying the expiration date from now on in days or a Date object.
* If a negative value is specified (e.g. a date in the past), the cookie will be deleted.
* If set to null or omitted, the cookie will be a session cookie and will not be retained
* when the the browser exits.
* @option String path The value of the path atribute of the cookie (default: path of page that created the cookie).
* @option String domain The value of the domain attribute of the cookie (default: domain of page that created the cookie).
* @option Boolean secure If true, the secure attribute of the cookie will be set and the cookie transmission will
* require a secure protocol (like HTTPS).
* @type undefined
*
* @name $.cookie
* @cat Plugins/Cookie
* @author Klaus Hartl/klaus.hartl@stilbuero.de
*/
/**
* Get the value of a cookie with the given name.
*
* @example $.cookie('the_cookie');
* @desc Get the value of a cookie.
*
* @param String name The name of the cookie.
* @return The value of the cookie.
* @type String
*
* @name $.cookie
* @cat Plugins/Cookie
* @author Klaus Hartl/klaus.hartl@stilbuero.de
*/
jQuery.cookie = function(name, value, options) {
if (typeof value != 'undefined') { // name and value given, set cookie
options = options || {};
if (value === null) {
value = '';
options.expires = -1;
}
var expires = '';
if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {
var date;
if (typeof options.expires == 'number') {
date = new Date();
date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));
} else {
date = options.expires;
}
expires = '; expires=' + date.toUTCString(); // use expires attribute, max-age is not supported by IE
}
// CAUTION: Needed to parenthesize options.path and options.domain
// in the following expressions, otherwise they evaluate to undefined
// in the packed version for some reason...
var path = options.path ? '; path=' + (options.path) : '';
var domain = options.domain ? '; domain=' + (options.domain) : '';
var secure = options.secure ? '; secure' : '';
document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');
} else { // only name given, get cookie
var cookieValue = null;
if (document.cookie && document.cookie != '') {
var cookies = document.cookie.split(';');
for (var i = 0; i < cookies.length; i++) {
var cookie = jQuery.trim(cookies[i]);
// Does this cookie string begin with the name we want?
if (cookie.substring(0, name.length + 1) == (name + '=')) {
cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
break;
}
}
}
return cookieValue;
}
};
数据接入层
知识点: 数据校验, 存入队列, 商品数量检测
数据校验:
<?php
//1 基础数据准备
header("Access-Control-Allow-Origin: http://www.xxxx.net"); //防止 跨域
$data = array('msg'=>'false');// 初始数据准备
//2 库文件引入
include_once 'lib/Mrgister.class.php';
include_once 'lib/Mredis.class.php';
include_once 'lib/function.php';
//3 整理数据 获取前台数据输入
$I = new Mrgister();
$I->I();
//获取前台数据
$value = serialize($I->get_value());
//4 数据队列存储流程
$Mredis = new Mredis();
if($Mredis->set_vaule($value)=='overflow'){
sendOver();// 发送处理
}else{
$data = array('msg'=>'ok');
}
//5 返回结果到前台
$callback = $_GET['callback'];
echo $callback.'('.json_encode($data).')';
function.php
<?php
// 创建token 字符串
function create(){
$str = 1111;
$end = 9999;
$salt = array("L","J","S","H");
$str = rand($str,$end);// 5555 // L 23
$a = $str.$str%ord($salt[0]);// 5555. 21== 555521-555525-565656-
$str = rand($str,$end);
$b = $str.$str%ord($salt[1]);
$str = rand($str,$end);
$c = $str.$str%ord($salt[2]);
$str = rand($str,$end);
$d = $str.$str%ord($salt[3]);
return $a.'-'.$b.'-'.$c.'-'.$d;
}
// 验证字符串
function check($res){
$flag = true;
$salt = array("L","J","S","H");
$res = explode('-',$res);
foreach($res as $k => $v){
$v_start = substr($v,0,4);
$v_end = substr($v,4);
$v_new = $v_start-$v_end;
if($v_new%ord($salt[$k])){
$flag = false;
}
}
return $flag;
}
// 发送通知信息
function sendOver(){
$url_level1 = 'http://www.miaosha_level1.net/set_file.php';// 修改称为自己的触发位置
$url_level2 = 'http://www.miaosha_level2.net/set_file.php';// 修改称为自己的触发位置
$url_level4 = 'http://www.miaosha_level4.net/set_file.php';// 修改称为自己的触发位置
// 收录完成
// 触发第一层：
$ch = curl_init();//初始化 GET 方式
curl_setopt($ch, CURLOPT_URL, $url_level1);//设置选项，包括URL
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_exec($ch);//执行并获取HTML文档内容
curl_close($ch);//释放curl句柄
// 触发第二层：
$ch = curl_init();//初始化 GET 方式
curl_setopt($ch, CURLOPT_URL, $url_level2);//设置选项，包括URL
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_exec($ch);//执行并获取HTML文档内容
curl_close($ch);//释放curl句柄
// 触发第四层:
$ch = curl_init();//初始化 GET 方式
curl_setopt($ch, CURLOPT_URL, $url_level4);//设置选项，包括URL
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_exec($ch);//执行并获取HTML文档内容
curl_close($ch);//释放curl句柄
}
Mredis.class.php
<?php
class Mredis{
private $redis;
/* 这里替换为实例id和实例password */
// 基础参数准备
//protected $host = "125945f062c14ec1.m.cnsha.kvstore.aliyuncs.com";
protected $host = "127.0.0.1";
protected $port = 6379;
//protected $user = "125945f062c14ec1";
protected $pwd = "pwwd";
protected $max = 5;
protected $key = 'shop';
// 设置数据库
// 构造函数 连接数据库
public function __construct(){
$this->redis = new Redis();
$this->redis->connect($this->host, $this->port);
$this->redis->auth($this->key);
}
//插入数值
public function set_vaule($value){
// 设置基数标志位
if(!$this->redis->get('flag')){
$this->redis->set('flag',1);
}
// 检测溢出
if($this->redis->get('flag')>$this->max){
return 'overflow';
}
// 插入非重复数据
if($this->redis->zAdd($this->key,$this->redis->get('flag'),$value)){
$this->redis->incr("flag");
}
}
// 返回全部存储数据
public function get_value(){
return $this->redis->zRange($this->key,0,-1);
}
public function flushAll(){
return $this->redis->flushAll();
}
// 类结束了
}
Mrgister.class.php
<?php
class Mrgister{
// 数据
protected $phone=0;
protected $number=0;
// 数安全过滤
public function I(){
$this->phone = floatval(isset($_GET['phone'])?$_GET['phone']:0);
$this->number = (isset($_GET['number'])?$_GET['number']:0);
if(!($this->phone&&$this->number&&$this->check_number())){
die('input data wrong');
}
return $this;
}
// 验证输入码安全
public function check_number(){// 其实用一个生成规则就好了
//$this->number = '177022-879765-97143-979171';
$flag = true;
$salt = array("L","J","S","H");
$res = explode('-',$this->number);
foreach($res as $k => $v){
$v_start = substr($v,0,4);
$v_end = substr($v,4);
$v_new = $v_start-$v_end;
if($v_new%ord($salt[$k])){
$flag = false;
}
}
return $flag;
}
// 获取正确 数值
public function get_value(){
return array($this->phone,$this->number);
}
// 类结束了
}
数据处理层
知识点: 数据持久化
set_mysql.php
<?php
// 转存信息 进入到 mysql 进行数据持久化
// 基础准备
namespace jingshan;
header("Content-type:text/html;charset=utf8");
include_once 'lib/Mredis.class.php';
include_once 'lib/PdoMiao.class.php';
// 获取数据
$Mredis = new Mredis();
$v = $Mredis->get_value();
$v = array_map(function($a){
return unserialize($a);
},$v);
// 插入数据
$i = new PdoMiao();
$i->insert($v);
PdoMiao.class.php
<?php
class PdoMiao {
protected $config = array(
//'hostname' => 'rm-bp15c7k47tx39267r.mysql.rds.aliyuncs.com', // 服务器地址
'hostname' => '127.0.0.1',
'database' => 'jingshan', // 数据库名
'hostport' => '3306', // 端口
'charset' => 'utf8', // 数据库编码默认采用utf8
);
protected $dbn;
protected $user = 'root';
protected $pwd = 'H7oq5Io6';
// 远程连接
public function __construct(){
$dsn = $this->parseDsn($this->config);
try{
$this->dbn = new \PDO($dsn,$this->user,$this->pwd);
}catch (\PDOException $e){
echo 'Connection failed: '.$e->getMessage();
}
}
// dsn 组装
protected function parseDsn($config){
$dsn = 'mysql:dbname='.$config['database'].';host='.$config['hostname'];
if(!empty($config['hostport'])) {
$dsn .= ';port='.$config['hostport'];
}
if(!empty($config['charset'])){
$dsn .= ';charset='.$config['charset'];
}
return $dsn;
}
// 插入数据到数据库
Public function insert($datas){
$sql = "INSERT INTO `miaosha` ( `id` , `phone` , `number` ) VALUES ( NULL , ?, ? );";
$sth = $this->dbn->prepare($sql);
foreach($datas as $k => $v){
$sth->execute($v);
}
}
————————————————
版权声明：本文为CSDN博主「KWTIT」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/weixin_41380972/article/details/86242066
