Question

我的Firebase Cloud Function失败，并出现以下错误：

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存储中。我构建以下代码的方式可以正常运行（每个函数调用均失败）。但是我担心，由于tmp文件夹中的旧文件不会被删除，因此我的tmp文件夹中会填满不必要的文件。

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，我的处理方式是将GUID赋予source.png的文件名，因为下次调用该函数时，执行bucket.file(filePath).download()时不会覆盖已下载的文件。。

但是我想清理我的tmp文件夹，但我不知道为什么该文件夹“繁忙或锁定”。有没有办法在尝试删除它之前将其解锁？

更新-DOUG解决方案

如Doug在下面回答的那样，请先删除所有文件，然后再删除文件夹。所以我最终这样做：

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

Answer 1

我不知道这是否会导致EBUSY，但是rmdir（节点的版本和具有相同名称的unix命令行）都要求在调用目录之前将其清空。您将文件留在那里，这可能会导致rmdir失败。尝试分别删除每个生成的文件，然后再删除目录。

缩略图云功能失败，并显示“错误：EBUSY：资源正忙或锁定，rmdir'/ tmp / thumbs'错误（本机）”

1 个答案: