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@gravito/nebula-s3

v1.0.1

Published

S3 storage driver for @gravito/nebula

Readme

@gravito/nebula-s3

S3 儲存驅動,適用於 @gravito/nebula

支援 AWS S3、Cloudflare R2、MinIO 等 S3 相容服務。

安裝

bun add @gravito/nebula-s3

功能特點

  • 完整的 StorageStore 實作
  • Stream 支援 - putStream/getStream
  • 分頁列舉 - listPaginated
  • Metadata 支援 - customMetadata, setMetadata
  • Presigned URL - getSignedUrl
  • 多服務支援 - AWS S3, Cloudflare R2, MinIO

快速開始

AWS S3

import { S3Store } from '@gravito/nebula-s3'
import { StorageManager } from '@gravito/nebula'

const s3Store = new S3Store({
  bucket: 'my-bucket',
  region: 'us-east-1',
  credentials: {
    accessKeyId: process.env.AWS_ACCESS_KEY_ID!,
    secretAccessKey: process.env.AWS_SECRET_ACCESS_KEY!,
  },
})

const storage = new StorageManager(
  (name) => s3Store,
  { default: 's3' }
)

// 使用
await storage.put('file.txt', 'Hello, S3!')
const data = await storage.get('file.txt')

Cloudflare R2

const r2Store = new S3Store({
  bucket: 'my-bucket',
  endpoint: `https://${accountId}.r2.cloudflarestorage.com`,
  region: 'auto',
  credentials: {
    accessKeyId: process.env.R2_ACCESS_KEY_ID!,
    secretAccessKey: process.env.R2_SECRET_ACCESS_KEY!,
  },
})

MinIO

const minioStore = new S3Store({
  bucket: 'my-bucket',
  endpoint: 'http://localhost:9000',
  region: 'us-east-1',
  forcePathStyle: true, // MinIO 需要
  credentials: {
    accessKeyId: 'minioadmin',
    secretAccessKey: 'minioadmin',
  },
})

API

基本操作

// 上傳檔案
await s3Store.put('file.txt', 'content')

// 下載檔案
const data = await s3Store.get('file.txt')

// 刪除檔案
await s3Store.delete('file.txt')

// 檢查存在
const exists = await s3Store.exists('file.txt')

// 複製檔案
await s3Store.copy('source.txt', 'dest.txt')

// 移動檔案
await s3Store.move('old.txt', 'new.txt')

串流操作

// 串流上傳(適合大檔案)
const fileStream = Bun.file('large-video.mp4').stream()
await s3Store.putStream('videos/upload.mp4', fileStream)

// 串流下載
const downloadStream = await s3Store.getStream('videos/upload.mp4')
if (downloadStream) {
  const file = Bun.file('downloaded.mp4')
  const writer = file.writer()
  const reader = downloadStream.getReader()

  while (true) {
    const { done, value } = await reader.read()
    if (done) break
    writer.write(value)
  }

  await writer.end()
}

Metadata 操作

// 上傳時設定 metadata
await s3Store.put('image.jpg', imageData, {
  contentType: 'image/jpeg',
  metadata: {
    author: 'John Doe',
    tags: 'nature,sunset',
  },
  cacheControl: 'public, max-age=31536000',
})

// 讀取 metadata
const meta = await s3Store.getMetadata('image.jpg')
console.log(meta.customMetadata?.author) // "John Doe"

// 更新 metadata
await s3Store.setMetadata('image.jpg', {
  tags: 'nature,sunset,photography',
})

分頁列舉

// 列舉檔案(分頁)
const page1 = await s3Store.listPaginated('uploads/', {
  maxResults: 100,
})

console.log(`Found ${page1.count} files`)

// 繼續獲取下一頁
if (page1.hasMore) {
  const page2 = await s3Store.listPaginated('uploads/', {
    maxResults: 100,
    cursor: page1.nextCursor!,
  })
}

// 完整分頁迭代
let cursor: string | null = null
do {
  const result = await s3Store.listPaginated('uploads/', {
    maxResults: 1000,
    cursor: cursor ?? undefined,
  })

  for (const item of result.items) {
    console.log(`File: ${item.key}, Size: ${item.size}`)
  }

  cursor = result.nextCursor
} while (cursor !== null)

Presigned URL

// 產生 24 小時有效的下載連結
const url = await s3Store.getSignedUrl('private-file.pdf', 86400)
console.log(url)
// https://my-bucket.s3.us-east-1.amazonaws.com/private-file.pdf?X-Amz-Algorithm=...

CDN 整合

const s3Store = new S3Store({
  bucket: 'my-bucket',
  region: 'us-east-1',
  publicUrl: 'https://cdn.example.com', // CDN URL
  credentials: { ... },
})

// 產生 CDN URL
const url = s3Store.getUrl('image.jpg')
// https://cdn.example.com/image.jpg

配置選項

interface S3StoreOptions {
  /** S3 Bucket 名稱 */
  bucket: string

  /** AWS Region (預設: 'auto') */
  region?: string

  /** 自定義 Endpoint (用於 MinIO, Cloudflare R2 等) */
  endpoint?: string

  /** AWS 憑證 */
  credentials?: {
    accessKeyId: string
    secretAccessKey: string
  }

  /** 公開 URL 前綴 (用於 CDN) */
  publicUrl?: string

  /** 是否強制使用 path-style URL (MinIO 需要) */
  forcePathStyle?: boolean
}

效能優化建議

大檔案上傳

對於大型檔案(>100MB),建議使用 putStream 而非 put

// ❌ 不佳 - 整個檔案載入記憶體
const file = await Bun.file('large.mp4').arrayBuffer()
await s3Store.put('videos/large.mp4', Buffer.from(file))

// ✅ 良好 - 串流上傳
const stream = Bun.file('large.mp4').stream()
await s3Store.putStream('videos/large.mp4', stream)

批次操作

列舉大量檔案時,使用 listPaginated 並設定合理的 maxResults

// ✅ 建議:分頁列舉
const result = await s3Store.listPaginated('uploads/', {
  maxResults: 1000, // 建議 100-1000
})

相容性

  • AWS S3 - ✅ 完整支援
  • Cloudflare R2 - ✅ 完整支援
  • MinIO - ✅ 完整支援(需設定 forcePathStyle: true
  • 其他 S3 相容服務 - ✅ 應該可正常運作

授權

MIT

相關連結