## 思路

### 用户请求限限流(同接口访问时间限制)

> redis key 接品名+ user_id 每访问一次+1 过期时间为限制访问时间

```php

_user_id = (int)$params['user_id'];

$this->_search_key = $params['apiName'].$this->_prefix;

$this->_key = $this->_search_key.$params['user_id'];

$this->_expireat_time = 60;##配置项

$this->_user_max_limit = 100;##配置项

$this->_max_limit = 100;##配置项

}

/**

* [userLimit 是否达到单用户接口请求峰值]

* @Author Jerry (wx621201)

* @DateTime 2019-08-02T15:35:52+0800

* @Example eg:

* @return [type] [description]

*/

public function checkUserLimit(){

if($this->_user_max_limit==0) return true;//0不限流，不存在防刷,可以购买

##如果不存在，说明超过一分钟，给SQL拦截

$matchNum = $this->_exists();

$matchNum = (int)$matchNum?$matchNum:0;

if($matchNum>$this->_user_max_limit) return false;##达到限流条件

$this->_set($matchNum+1);

return true;##默认通过

}

/**

* [countLimit 是否达到用户限流数]

* @Author Jerry (c84133883)

* @DateTime 2019-08-05T10:26:39+0800

* @Example eg:

* @return [type] [description]

*/

public function checkCountLimit(){

if($this->_max_limit==0) return true;//0不限流

if($this->_userCount>$this->_max_limit){

return false;

}else{

return true;

}

}

/**

* [_userCount 总用户数]

* @Author Jerry (wx621201)

* @DateTime 2019-08-02T15:41:08+0800

* @Example eg:

* @return [type] [description]

*/

private function _userCount(){

$list = redis::scene($this->_scene)->keys($this->_search_key.'*');

return count($list);

}

/**

* [_set description]

* @Author Jerry (wx621201)

* @DateTime 2019-08-02T15:45:51+0800

* @Example eg:

* @param [type] $key [description]

* @param [type] $value [description]

* @param integer $time [description]

* @param string $scene [description]

*/

private function _set($value){

redis::scene($this->_scene)->set($this->_key,$value);

##处理过期时间

$expiretime = time()+(float)$this->_expireat_time;##1分钟

redis::scene($this->_scene)->expireat($this->_key,$expiretime);

return ture;

}

/**

* [_exists 检查是否存在]

* @Author Jerry (wx621201)

* @DateTime 2019-08-02T15:45:54+0800

* @Example eg:

* @param [type] $key [description]

* @param string $scene [description]

* @return [type] [description]

*/

private function _exists(){

if(!redis::scene($this->_scene)->exists($this->_key)||!redis::scene($this->_scene)->get($this->_key)){

return false;

}

return redis::scene($this->_scene)->get($this->_key);

}

}

```

### 总的用户限流

#### 求合上面的key数，得出当前所在的用户数量

### 所有请求限流

#### 思路1 通过IP限流