Upload formidable

app.js

const createError = require('http-errors')
const express = require('express')
const path = require('path')
const fs = require('fs').promises
const formidable = require('formidable')
const app = express()

const uploadDir = path.join(process.cwd(), 'uploads')
const storeImage = path.join(process.cwd(), 'images')

const parseFrom = (form, req) => {
  return new Promise((resolve, reject) => {
    form.parse(req, (err, fields, files) => {
      if (err) {
        return reject(err)
      }
      resolve({ fields, files })
    })
  })
}

app.post('/upload', async (req, res, next) => {
  const form = formidable({ uploadDir, maxFileSize: 2 * 1024 * 1024 })
  const { fields, files } = await parseFrom(form, req)
  const { path: temporaryName, name } = files.picture
  const { description } = fields

  const fileName = path.join(storeImage, name)
  try {
    await fs.rename(temporaryName, fileName)
  } catch (err) {
    await fs.unlink(temporaryName)
    return next(err)
  }
  res.json({ description, message: 'Файл успешно загружен', status: 200 })
})

const isAccessible = (path) => {
  return fs
    .access(path)
    .then(() => true)
    .catch(() => false)
}
const createFolderIsNotExist = async (folder) => {
  if (!(await isAccessible(folder))) {
    await fs.mkdir(folder)
  }
}

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404))
})

// error handler
app.use((err, req, res, next) => {
  res.status(err.status || 500)
  res.json({ message: err.message, status: err.status })
})

const PORT = process.env.PORT || 3000
app.listen(PORT, async () => {
  createFolderIsNotExist(uploadDir)
  createFolderIsNotExist(storeImage)
  console.log(`Server running. Use on port:${PORT}`)
})

package.json

{
  "name": "upload-formidable",
  "version": "1.0.0",
  "description": "",
  "main": "app.js",
  "scripts": {
    "start;dev": "nodemon app.js"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "express": "^4.17.1",
    "formidable": "^1.2.2",
    "http-errors": "^1.8.0"
  }
}