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4195cd2b | 1 | import * as express from 'express' |
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2 | import { createClient, RedisClient } from 'redis' |
3 | import { logger } from '../helpers/logger' | |
4 | import { generateRandomString } from '../helpers/utils' | |
fd4484f1 | 5 | import { CONFIG, USER_PASSWORD_RESET_LIFETIME, VIDEO_VIEW_LIFETIME } from '../initializers' |
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6 | |
7 | type CachedRoute = { | |
8 | body: string, | |
9 | contentType?: string | |
10 | statusCode?: string | |
11 | } | |
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12 | |
13 | class Redis { | |
14 | ||
15 | private static instance: Redis | |
16 | private initialized = false | |
17 | private client: RedisClient | |
18 | private prefix: string | |
19 | ||
20 | private constructor () {} | |
21 | ||
22 | init () { | |
23 | // Already initialized | |
24 | if (this.initialized === true) return | |
25 | this.initialized = true | |
26 | ||
27 | this.client = createClient({ | |
28 | host: CONFIG.REDIS.HOSTNAME, | |
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29 | port: CONFIG.REDIS.PORT, |
30 | db: CONFIG.REDIS.DB | |
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31 | }) |
32 | ||
33 | this.client.on('error', err => { | |
d5b7d911 | 34 | logger.error('Error in Redis client.', { err }) |
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35 | process.exit(-1) |
36 | }) | |
37 | ||
38 | if (CONFIG.REDIS.AUTH) { | |
39 | this.client.auth(CONFIG.REDIS.AUTH) | |
40 | } | |
41 | ||
42 | this.prefix = 'redis-' + CONFIG.WEBSERVER.HOST + '-' | |
43 | } | |
44 | ||
45 | async setResetPasswordVerificationString (userId: number) { | |
46 | const generatedString = await generateRandomString(32) | |
47 | ||
48 | await this.setValue(this.generateResetPasswordKey(userId), generatedString, USER_PASSWORD_RESET_LIFETIME) | |
49 | ||
50 | return generatedString | |
51 | } | |
52 | ||
53 | async getResetPasswordLink (userId: number) { | |
54 | return this.getValue(this.generateResetPasswordKey(userId)) | |
55 | } | |
56 | ||
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57 | setView (ip: string, videoUUID: string) { |
58 | return this.setValue(this.buildViewKey(ip, videoUUID), '1', VIDEO_VIEW_LIFETIME) | |
59 | } | |
60 | ||
61 | async isViewExists (ip: string, videoUUID: string) { | |
62 | return this.exists(this.buildViewKey(ip, videoUUID)) | |
63 | } | |
64 | ||
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65 | async getCachedRoute (req: express.Request) { |
66 | const cached = await this.getObject(this.buildCachedRouteKey(req)) | |
67 | ||
68 | return cached as CachedRoute | |
69 | } | |
70 | ||
fd4484f1 | 71 | setCachedRoute (req: express.Request, body: any, lifetime: number, contentType?: string, statusCode?: number) { |
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72 | const cached: CachedRoute = { |
73 | body: body.toString(), | |
74 | contentType, | |
75 | statusCode: statusCode.toString() | |
76 | } | |
77 | ||
fd4484f1 | 78 | return this.setObject(this.buildCachedRouteKey(req), cached, lifetime) |
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79 | } |
80 | ||
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81 | generateResetPasswordKey (userId: number) { |
82 | return 'reset-password-' + userId | |
83 | } | |
84 | ||
85 | buildViewKey (ip: string, videoUUID: string) { | |
86 | return videoUUID + '-' + ip | |
87 | } | |
88 | ||
89 | buildCachedRouteKey (req: express.Request) { | |
90 | return req.method + '-' + req.originalUrl | |
91 | } | |
92 | ||
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93 | private getValue (key: string) { |
94 | return new Promise<string>((res, rej) => { | |
95 | this.client.get(this.prefix + key, (err, value) => { | |
96 | if (err) return rej(err) | |
97 | ||
98 | return res(value) | |
99 | }) | |
100 | }) | |
101 | } | |
102 | ||
103 | private setValue (key: string, value: string, expirationMilliseconds: number) { | |
104 | return new Promise<void>((res, rej) => { | |
105 | this.client.set(this.prefix + key, value, 'PX', expirationMilliseconds, (err, ok) => { | |
106 | if (err) return rej(err) | |
107 | ||
4195cd2b | 108 | if (ok !== 'OK') return rej(new Error('Redis set result is not OK.')) |
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109 | |
110 | return res() | |
111 | }) | |
112 | }) | |
113 | } | |
114 | ||
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115 | private setObject (key: string, obj: { [ id: string ]: string }, expirationMilliseconds: number) { |
116 | return new Promise<void>((res, rej) => { | |
117 | this.client.hmset(this.prefix + key, obj, (err, ok) => { | |
118 | if (err) return rej(err) | |
119 | if (!ok) return rej(new Error('Redis mset result is not OK.')) | |
120 | ||
121 | this.client.pexpire(this.prefix + key, expirationMilliseconds, (err, ok) => { | |
122 | if (err) return rej(err) | |
123 | if (!ok) return rej(new Error('Redis expiration result is not OK.')) | |
124 | ||
125 | return res() | |
126 | }) | |
127 | }) | |
128 | }) | |
129 | } | |
130 | ||
131 | private getObject (key: string) { | |
132 | return new Promise<{ [ id: string ]: string }>((res, rej) => { | |
133 | this.client.hgetall(this.prefix + key, (err, value) => { | |
134 | if (err) return rej(err) | |
135 | ||
136 | return res(value) | |
137 | }) | |
138 | }) | |
139 | } | |
140 | ||
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141 | private exists (key: string) { |
142 | return new Promise<boolean>((res, rej) => { | |
143 | this.client.exists(this.prefix + key, (err, existsNumber) => { | |
144 | if (err) return rej(err) | |
145 | ||
146 | return res(existsNumber === 1) | |
147 | }) | |
148 | }) | |
149 | } | |
150 | ||
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151 | static get Instance () { |
152 | return this.instance || (this.instance = new this()) | |
153 | } | |
154 | } | |
155 | ||
156 | // --------------------------------------------------------------------------- | |
157 | ||
158 | export { | |
159 | Redis | |
160 | } |