next.jsのroute handlersからgcsにファイルをupload

概要

next.jsのapp/api/のapiを利用してgcsにファイルをuploadする。

実装

import { Storage } from '@google-cloud/storage'
import { NextRequest } from 'next/server'

export async function POST(req:NextRequest) {
      const requestBody = await req.formData()
    
      const storage = new Storage({
        projectId: process.env.PROJECT_ID,
        keyFilename: process.env.GOOGLE_APPLICATION_CREDENTIALS,
      })
      const bucketName = process.env.BUCKET_NAME
      const bucket = storage.bucket(bucketName)
      const file = requestBody.get('file')
      if (file instanceof File) {
        const arrayBuffer = await file.arrayBuffer()
        const buffer = Buffer.from(arrayBuffer)
          
        await bucket.file(file.name).save(buffer)
      }
}