mirror of https://github.com/Chocobozzz/PeerTube
54 lines
1.6 KiB
TypeScript
54 lines
1.6 KiB
TypeScript
import * as AsyncLRU from 'async-lru'
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import { createWriteStream } from 'fs'
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import { unlinkPromise } from '../../helpers/core-utils'
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import { logger } from '../../helpers/logger'
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import { VideoModel } from '../../models/video/video'
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import { fetchRemoteVideoStaticFile } from '../activitypub'
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export abstract class AbstractVideoStaticFileCache <T> {
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protected lru
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abstract getFilePath (params: T): Promise<string>
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// Load and save the remote file, then return the local path from filesystem
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protected abstract loadRemoteFile (key: string): Promise<string>
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init (max: number, maxAge: number) {
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this.lru = new AsyncLRU({
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max,
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maxAge,
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load: (key, cb) => {
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this.loadRemoteFile(key)
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.then(res => cb(null, res))
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.catch(err => cb(err))
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}
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})
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this.lru.on('evict', (obj: { key: string, value: string }) => {
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unlinkPromise(obj.value)
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.then(() => logger.debug('%s evicted from %s', obj.value, this.constructor.name))
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})
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}
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protected loadFromLRU (key: string) {
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return new Promise<string>((res, rej) => {
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this.lru.get(key, (err, value) => {
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err ? rej(err) : res(value)
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})
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})
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}
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protected saveRemoteVideoFileAndReturnPath (video: VideoModel, remoteStaticPath: string, destPath: string) {
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return new Promise<string>((res, rej) => {
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const req = fetchRemoteVideoStaticFile(video, remoteStaticPath, rej)
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const stream = createWriteStream(destPath)
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req.pipe(stream)
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.on('error', (err) => rej(err))
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.on('finish', () => res(destPath))
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})
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}
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}
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