Javascript 缩略图云功能失败,出现“0”;错误:EBUSY:资源正忙或已锁定,rmdir'/tmp/拇指';错误时(本机)“;

Javascript 缩略图云功能失败,出现“0”;错误:EBUSY:资源正忙或已锁定,rmdir'/tmp/拇指';错误时(本机)“;,javascript,firebase,google-cloud-functions,firebase-storage,Javascript,Firebase,Google Cloud Functions,Firebase Storage,My Firebase Cloud函数失败,出现以下错误: Error: EBUSY: resource busy or locked, rmdir '/tmp/thumbs' at Error (native) 使用我的功能,我为上传的图片创建缩略图,并将其保存到Firebase存储。按照我构建以下代码的方式,一切正常(除了每个函数调用都失败)。但我担心,由于tmp文件夹中的旧文件没有被删除,我的tmp文件夹将充满不必要的文件 import * as functions from 'fire

My Firebase Cloud函数失败,出现以下错误:

Error: EBUSY: resource busy or locked, rmdir '/tmp/thumbs' at Error (native)
使用我的功能,我为上传的图片创建缩略图,并将其保存到Firebase存储。按照我构建以下代码的方式,一切正常(除了每个函数调用都失败)。但我担心,由于tmp文件夹中的旧文件没有被删除,我的tmp文件夹将充满不必要的文件

import * as functions from 'firebase-functions'

import {tmpdir} from 'os'
import {join, dirname} from 'path'

import * as sharp from 'sharp'
import * as fs from 'fs-extra'
import * as admin from "firebase-admin"

const storage = admin.storage()

/* Saves thumbnails for all userPics uploaded to Google Cloud Storage */
export const thumbnailCreator = functions.storage
    .object()
    .onFinalize(async object => {
        const bucket = storage.bucket(object.bucket)
        const filePath = object.name
        const fileName = filePath.split('/').pop()
        const bucketDir = dirname(filePath)
        const workingDir = join(tmpdir(), 'thumbs')

        /* Temporary: Creates a random number for the sourceFilePath
        * because currently bucket.file(filePath).download does not seem to overwrite
        * existing files and fs.rmdir(workingDir) does throw that error... */

        const randomNr = Math.random().toString(36).substring(2, 15) +
            Math.random().toString(36).substring(2, 15)

        const tmpFilePath = join(workingDir, `source_${randomNr}.png`)

        if (!object.contentType.includes('image')) {
            console.log('exiting function (no image)')
            return false
        }

        if (fileName.includes('thumb@')) {
            console.log('exiting function (already a thumbnail')
            return false
        }

        // 1. Ensure thumbnail dir exists
        await fs.ensureDir(workingDir)

        // 2. Download Source File
        await bucket.file(filePath).download({
            destination: tmpFilePath
        })

        // 3. Resize the images and define an array of upload promises
        const sizes = [64, 128, 256, 512]

        const uploadPromises = sizes.map(async size => {
            const thumbName = `thumb@${size}_${fileName}`
            const thumbPath = join(workingDir, thumbName)

            // Resize source image
            await sharp(tmpFilePath)
                .rotate()
                .resize(size, size)
                .toFile(thumbPath)

            // Upload to GCS
            const file = await bucket.upload(thumbPath, {
                destination: join(bucketDir, thumbName),
                predefinedAcl: 'publicRead'
            })

        })

        // 4. Run the upload operations
        await Promise.all(uploadPromises)

        // 5. Cleanup remove the tmp/thumbs from the filesystem
        return fs.rmdir(workingDir)
        // TODO: This fails every time -> also tried with fs.remove(workingDir), same issue.

    })
如您所见,我处理它的方法是为source.png的文件名提供GUID,因为下次调用该函数时,在执行
bucket.file(filePath).download()时,它不会覆盖已下载的文件

但是我想清理我的tmp文件夹,我不知道为什么文件夹“忙或锁定”。在尝试删除它之前,是否有方法将其解锁

更新-来自DOUG的解决方案

正如Doug在下面回答的那样,在删除文件夹之前删除所有文件是有效的。所以我就这样做了:

// 5. Cleanup remove the tmp/thumbs from the filesystem
await fs.emptyDir(workingDir)
await fs.remove(workingDir)

我不知道这是否会导致EBUSY,但是rmdir(节点的版本和同名的unix命令行)要求在调用它之前目录为空。您在其中留下了文件,这可能会导致rmdir失败。尝试分别删除每个生成的文件,然后删除目录。

Thx Doug,这很有用!我忘了在上面提到,我已经用fs extra的
fs.remove()
尝试过了,它应该会删除其中包含文件的文件夹,但奇怪的是,同样的错误发生了。现在先用
fs.emptyDir(workingDir)
删除文件,然后用
fs.remove(workingDir)
删除目录就可以了。我知道我可以相信你的皮萨兹;-)