我想防止我的脚本被淹没 - 如果用户按 F5,它每次都会执行脚本。
我想防止这种情况并允许每 2 秒执行一个脚本,有什么解决方案吗?
您可以使用内存缓存来执行此操作..
简单的演示脚本
$memcache = new Memcache ();
$memcache->connect ( 'localhost', 11211 );
$runtime = $memcache->get ( 'floodControl' );
if ((time () - $runtime) < 2) {
die ( "Die! Die! Die!" );
}
else {
echo "Welcome";
$memcache->set ( "floodControl", time () );
}
这只是一个示例代码..还有其他需要考虑的事情,例如
一个更好的IP
地址检测(Proxy、Tor)
B. 当前行动
C. 每分钟最大执行次数等...
D. 在最大洪水等之后禁止用户
编辑 1 - 改进版本
Usage
$flood = new FloodDetection();
$flood->check();
echo "Welcome" ;
Class
class FloodDetection {
const HOST = "localhost";
const PORT = 11211;
private $memcache;
private $ipAddress;
private $timeLimitUser = array (
"DEFAULT" => 2,
"CHAT" => 3,
"LOGIN" => 4
);
private $timeLimitProcess = array (
"DEFAULT" => 0.1,
"CHAT" => 1.5,
"LOGIN" => 0.1
);
function __construct() {
$this->memcache = new Memcache ();
$this->memcache->connect ( self::HOST, self::PORT );
}
function addUserlimit($key, $time) {
$this->timeLimitUser [$key] = $time;
}
function addProcesslimit($key, $time) {
$this->timeLimitProcess [$key] = $time;
}
public function quickIP() {
return (empty ( $_SERVER ['HTTP_CLIENT_IP'] ) ? (empty ( $_SERVER ['HTTP_X_FORWARDED_FOR'] ) ? $_SERVER ['REMOTE_ADDR'] : $_SERVER ['HTTP_X_FORWARDED_FOR']) : $_SERVER ['HTTP_CLIENT_IP']);
}
public function check($action = "DEFAULT") {
$ip = $this->quickIP ();
$ipKey = "flood" . $action . sha1 ( $ip );
$runtime = $this->memcache->get ( 'floodControl' );
$iptime = $this->memcache->get ( $ipKey );
$limitUser = isset ( $this->timeLimitUser [$action] ) ? $this->timeLimitUser [$action] : $this->timeLimitUser ['DEFAULT'];
$limitProcess = isset ( $this->timeLimitProcess [$action] ) ? $this->timeLimitProcess [$action] : $this->timeLimitProcess ['DEFAULT'];
if ((microtime ( true ) - $iptime) < $limitUser) {
print ("Die! Die! Die! $ip") ;
exit ();
}
// Limit All request
if ((microtime ( true ) - $runtime) < $limitProcess) {
print ("All of you Die! Die! Die! $ip") ;
exit ();
}
$this->memcache->set ( "floodControl", microtime ( true ) );
$this->memcache->set ( $ipKey, microtime ( true ) );
}
}
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