|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace Gvera\Services; |
|
4
|
|
|
|
|
5
|
|
|
use Exception; |
|
6
|
|
|
use Gvera\Cache\Cache; |
|
7
|
|
|
use Gvera\Cache\FilesCache; |
|
8
|
|
|
use Gvera\Cache\RedisClientCache; |
|
9
|
|
|
use Gvera\Exceptions\InvalidArgumentException; |
|
10
|
|
|
use Gvera\Exceptions\ThrottledException; |
|
11
|
|
|
|
|
12
|
|
|
class ThrottlingService |
|
13
|
|
|
{ |
|
14
|
|
|
const PREFIX_THROTTLING = 'gv_throttling_'; |
|
15
|
|
|
/** |
|
16
|
|
|
* @var int |
|
17
|
|
|
* By default 4 requests per second. |
|
18
|
|
|
*/ |
|
19
|
|
|
private int $allowedRequestsPerSecond = 4; |
|
20
|
|
|
/** |
|
21
|
|
|
* @var string |
|
22
|
|
|
*/ |
|
23
|
|
|
private $ip; |
|
24
|
|
|
|
|
25
|
|
|
public function __construct() |
|
26
|
|
|
{ |
|
27
|
|
|
} |
|
28
|
|
|
|
|
29
|
|
|
/** |
|
30
|
|
|
* @throws ThrottledException |
|
31
|
|
|
* @throws InvalidArgumentException |
|
32
|
|
|
* @throws Exception |
|
33
|
|
|
*/ |
|
34
|
|
|
public function validateRate() |
|
35
|
|
|
{ |
|
36
|
|
|
if (!isset($this->ip)) { |
|
37
|
|
|
throw new \InvalidArgumentException('Unable to validate throttling without ip'); |
|
38
|
|
|
} |
|
39
|
|
|
|
|
40
|
|
|
$cache = Cache::getCache(); |
|
41
|
|
|
|
|
42
|
|
|
if (!is_a($cache, RedisClientCache::class)) { |
|
43
|
|
|
return; |
|
44
|
|
|
} |
|
45
|
|
|
|
|
46
|
|
|
$key = self::PREFIX_THROTTLING . $this->ip; |
|
47
|
|
|
if ($cache->exists($key)) { |
|
48
|
|
|
$last = $cache->load($key); |
|
49
|
|
|
$current = microtime(true); |
|
50
|
|
|
$sec = abs($last - $current); |
|
51
|
|
|
if ($sec <= (1 / $this->allowedRequestsPerSecond)) { |
|
52
|
|
|
throw new ThrottledException('request not allowed', ['ip' => $this->ip]); |
|
53
|
|
|
} |
|
54
|
|
|
} |
|
55
|
|
|
|
|
56
|
|
|
$cache->save($key, microtime(true), 10); |
|
57
|
|
|
} |
|
58
|
|
|
|
|
59
|
|
|
public function setIp(string $ip) |
|
60
|
|
|
{ |
|
61
|
|
|
$this->ip = $ip; |
|
62
|
|
|
} |
|
63
|
|
|
|
|
64
|
|
|
public function setAllowedRequestsPerSecond($rps) |
|
65
|
|
|
{ |
|
66
|
|
|
$this->allowedRequestsPerSecond = $rps; |
|
67
|
|
|
} |
|
68
|
|
|
} |
|
69
|
|
|
|
veraguido /
gv
