PeerTube/server/lib/redis.ts

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import * as express from 'express'
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import { createClient, RedisClient } from 'redis'
import { logger } from '../helpers/logger'
import { generateRandomString } from '../helpers/utils'
import { CONFIG, USER_PASSWORD_RESET_LIFETIME, USER_EMAIL_VERIFY_LIFETIME, VIDEO_VIEW_LIFETIME } from '../initializers'
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type CachedRoute = {
body: string,
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contentType?: string
statusCode?: string
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}
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class Redis {
private static instance: Redis
private initialized = false
private client: RedisClient
private prefix: string
private constructor () {}
init () {
// Already initialized
if (this.initialized === true) return
this.initialized = true
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this.client = createClient(Redis.getRedisClient())
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this.client.on('error', err => {
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logger.error('Error in Redis client.', { err })
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process.exit(-1)
})
if (CONFIG.REDIS.AUTH) {
this.client.auth(CONFIG.REDIS.AUTH)
}
this.prefix = 'redis-' + CONFIG.WEBSERVER.HOST + '-'
}
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static getRedisClient () {
return Object.assign({},
(CONFIG.REDIS.AUTH && CONFIG.REDIS.AUTH != null) ? { password: CONFIG.REDIS.AUTH } : {},
(CONFIG.REDIS.DB) ? { db: CONFIG.REDIS.DB } : {},
(CONFIG.REDIS.HOSTNAME && CONFIG.REDIS.PORT) ?
{ host: CONFIG.REDIS.HOSTNAME, port: CONFIG.REDIS.PORT } :
{ path: CONFIG.REDIS.SOCKET }
)
}
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/************* Forgot password *************/
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async setResetPasswordVerificationString (userId: number) {
const generatedString = await generateRandomString(32)
await this.setValue(this.generateResetPasswordKey(userId), generatedString, USER_PASSWORD_RESET_LIFETIME)
return generatedString
}
async getResetPasswordLink (userId: number) {
return this.getValue(this.generateResetPasswordKey(userId))
}
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/************* Email verification *************/
async setVerifyEmailVerificationString (userId: number) {
const generatedString = await generateRandomString(32)
await this.setValue(this.generateVerifyEmailKey(userId), generatedString, USER_EMAIL_VERIFY_LIFETIME)
return generatedString
}
async getVerifyEmailLink (userId: number) {
return this.getValue(this.generateVerifyEmailKey(userId))
}
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/************* Views per IP *************/
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setIPVideoView (ip: string, videoUUID: string) {
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return this.setValue(this.generateViewKey(ip, videoUUID), '1', VIDEO_VIEW_LIFETIME)
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}
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async isVideoIPViewExists (ip: string, videoUUID: string) {
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return this.exists(this.generateViewKey(ip, videoUUID))
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}
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/************* API cache *************/
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async getCachedRoute (req: express.Request) {
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const cached = await this.getObject(this.generateCachedRouteKey(req))
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return cached as CachedRoute
}
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setCachedRoute (req: express.Request, body: any, lifetime: number, contentType?: string, statusCode?: number) {
const cached: CachedRoute = Object.assign({}, {
body: body.toString()
},
(contentType) ? { contentType } : null,
(statusCode) ? { statusCode: statusCode.toString() } : null
)
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return this.setObject(this.generateCachedRouteKey(req), cached, lifetime)
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}
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/************* Video views *************/
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addVideoView (videoId: number) {
const keyIncr = this.generateVideoViewKey(videoId)
const keySet = this.generateVideosViewKey()
return Promise.all([
this.addToSet(keySet, videoId.toString()),
this.increment(keyIncr)
])
}
async getVideoViews (videoId: number, hour: number) {
const key = this.generateVideoViewKey(videoId, hour)
const valueString = await this.getValue(key)
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const valueInt = parseInt(valueString, 10)
if (isNaN(valueInt)) {
logger.error('Cannot get videos views of video %d in hour %d: views number is NaN (%s).', videoId, hour, valueString)
return undefined
}
return valueInt
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}
async getVideosIdViewed (hour: number) {
const key = this.generateVideosViewKey(hour)
const stringIds = await this.getSet(key)
return stringIds.map(s => parseInt(s, 10))
}
deleteVideoViews (videoId: number, hour: number) {
const keySet = this.generateVideosViewKey(hour)
const keyIncr = this.generateVideoViewKey(videoId, hour)
return Promise.all([
this.deleteFromSet(keySet, videoId.toString()),
this.deleteKey(keyIncr)
])
}
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/************* Keys generation *************/
generateCachedRouteKey (req: express.Request) {
return req.method + '-' + req.originalUrl
}
private generateVideosViewKey (hour?: number) {
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if (!hour) hour = new Date().getHours()
return `videos-view-h${hour}`
}
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private generateVideoViewKey (videoId: number, hour?: number) {
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if (!hour) hour = new Date().getHours()
return `video-view-${videoId}-h${hour}`
}
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private generateResetPasswordKey (userId: number) {
return 'reset-password-' + userId
}
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private generateVerifyEmailKey (userId: number) {
return 'verify-email-' + userId
}
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private generateViewKey (ip: string, videoUUID: string) {
return videoUUID + '-' + ip
}
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/************* Redis helpers *************/
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private getValue (key: string) {
return new Promise<string>((res, rej) => {
this.client.get(this.prefix + key, (err, value) => {
if (err) return rej(err)
return res(value)
})
})
}
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private getSet (key: string) {
return new Promise<string[]>((res, rej) => {
this.client.smembers(this.prefix + key, (err, value) => {
if (err) return rej(err)
return res(value)
})
})
}
private addToSet (key: string, value: string) {
return new Promise<string[]>((res, rej) => {
this.client.sadd(this.prefix + key, value, err => err ? rej(err) : res())
})
}
private deleteFromSet (key: string, value: string) {
return new Promise<void>((res, rej) => {
this.client.srem(this.prefix + key, value, err => err ? rej(err) : res())
})
}
private deleteKey (key: string) {
return new Promise<void>((res, rej) => {
this.client.del(this.prefix + key, err => err ? rej(err) : res())
})
}
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private deleteFieldInHash (key: string, field: string) {
return new Promise<void>((res, rej) => {
this.client.hdel(this.prefix + key, field, err => err ? rej(err) : res())
})
}
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private setValue (key: string, value: string, expirationMilliseconds: number) {
return new Promise<void>((res, rej) => {
this.client.set(this.prefix + key, value, 'PX', expirationMilliseconds, (err, ok) => {
if (err) return rej(err)
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if (ok !== 'OK') return rej(new Error('Redis set result is not OK.'))
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return res()
})
})
}
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private setObject (key: string, obj: { [ id: string ]: string }, expirationMilliseconds: number) {
return new Promise<void>((res, rej) => {
this.client.hmset(this.prefix + key, obj, (err, ok) => {
if (err) return rej(err)
if (!ok) return rej(new Error('Redis mset result is not OK.'))
this.client.pexpire(this.prefix + key, expirationMilliseconds, (err, ok) => {
if (err) return rej(err)
if (!ok) return rej(new Error('Redis expiration result is not OK.'))
return res()
})
})
})
}
private getObject (key: string) {
return new Promise<{ [ id: string ]: string }>((res, rej) => {
this.client.hgetall(this.prefix + key, (err, value) => {
if (err) return rej(err)
return res(value)
})
})
}
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private setValueInHash (key: string, field: string, value: string) {
return new Promise<void>((res, rej) => {
this.client.hset(this.prefix + key, field, value, (err) => {
if (err) return rej(err)
return res()
})
})
}
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private increment (key: string) {
return new Promise<number>((res, rej) => {
this.client.incr(this.prefix + key, (err, value) => {
if (err) return rej(err)
return res(value)
})
})
}
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private exists (key: string) {
return new Promise<boolean>((res, rej) => {
this.client.exists(this.prefix + key, (err, existsNumber) => {
if (err) return rej(err)
return res(existsNumber === 1)
})
})
}
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static get Instance () {
return this.instance || (this.instance = new this())
}
}
// ---------------------------------------------------------------------------
export {
Redis
}