1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
import Limiter from 'ratelimiter';
import { CacheableLocalUser, User } from '@/models/entities/user.js';
import Logger from '@/services/logger.js';
import { redisClient } from '../../db/redis.js';
import { IEndpointMeta } from './endpoints.js';
const logger = new Logger('limiter');
export const limiter = (limitation: IEndpointMeta['limit'] & { key: NonNullable<string> }, actor: string) => new Promise<void>((ok, reject) => {
if (process.env.NODE_ENV === 'test') ok();
const hasShortTermLimit = typeof limitation.minInterval === 'number';
const hasLongTermLimit =
typeof limitation.duration === 'number' &&
typeof limitation.max === 'number';
if (hasShortTermLimit) {
min();
} else if (hasLongTermLimit) {
max();
} else {
ok();
}
// Short-term limit
function min(): void {
const minIntervalLimiter = new Limiter({
id: `${actor}:${limitation.key}:min`,
duration: limitation.minInterval,
max: 1,
db: redisClient,
});
minIntervalLimiter.get((err, info) => {
if (err) {
return reject('ERR');
}
logger.debug(`${actor} ${limitation.key} min remaining: ${info.remaining}`);
if (info.remaining === 0) {
reject('BRIEF_REQUEST_INTERVAL');
} else {
if (hasLongTermLimit) {
max();
} else {
ok();
}
}
});
}
// Long term limit
function max(): void {
const limiter = new Limiter({
id: `${actor}:${limitation.key}`,
duration: limitation.duration,
max: limitation.max,
db: redisClient,
});
limiter.get((err, info) => {
if (err) {
return reject('ERR');
}
logger.debug(`${actor} ${limitation.key} max remaining: ${info.remaining}`);
if (info.remaining === 0) {
reject('RATE_LIMIT_EXCEEDED');
} else {
ok();
}
});
}
});
|
