How to upload multiple images at a time in s3 bucket using Node JS (Express)

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Arun M

require("dotenv").config();
const AWS = require("aws-sdk");
const multer = require("multer");
const multerS3 = require("multer-s3");
const uuid = require("uuid").v4;
const path = require("path");

const s3 = new AWS.S3({
  accessKeyId: process.env.AWS_S3_ACCESS_KEY_ID,
  secretAccessKey: process.env.AWS_S3_SECRET_ACCESS_KEY
});

const upload = multer({
  storage: multerS3({
    s3: s3,
    Bucket: process.env.AWS_S3_BUCKET_NAME,
    ACL: "public-read",
    metadata: (req, file, cd) => {
      cd(null, { fieldName: file.fieldname });
    },
    key: (req, file, cb) => {
      const ext = path.extname(file.originalname);
      const uniqueName = `${uuid()}${ext}`;
      cb(null, uniqueName);
    },
  }),
});

module.exports = {
    upload
} 
router.post("/photo-upload", upload.array('photos'), (req, res) => {  
    return res.status(200).send({
      success: true,
      result: 'Images Uploaded',
    });
  });

After adding this code my code is crashing and getting below errors **node_modules/multer-s3/index.js:94 case 'undefined': throw new Error('bucket is required')

Error: bucket is required at new S3Storage**

is there any way to upload multiple file at a time not using loop. Body: buffer, can I send it as a [buffer, buffer]?

Erykj97

I would suggest you maybe consider using multer and multerS3 libraries, this would look as follows.

fileUpload.js

    const aws = require("aws-sdk")
    const multer = require("multer")
    const multerS3 = require("multer-s3")
    const uuid = require("uuid").v4
    const path = require("path")

    const s3 = new aws.S3({
        accessKeyId: <secret-id>,
        secretAccessKey: <secret-key>,
        region: <server-region>,
        apiVersion: "2012-10-17"
    })
    
    const upload = multer({
        storage: multerS3({
            s3:s3,
            bucket: <bucket-name>,
            acl: "public-read",
            metadata: (req, file, cd) => {
                cd(null, {fieldName: file.fieldname})
            },
            key: async (req, file, cb) => {
                const ext = path.extname(file.originalname)
                const uniqueName = `${uuid()}${ext}`
                cb(null, uniqueName)
            },
            
            
        })
    })

You then import the file into your routes and add upload.array to the route you want to upload images on

imageRoutes.js

const express = require("express");
const router = express.Router();
const upload = require("./fileUpload")
    
    router.post("/", upload.array("image"), (req, res) => {
    res.send("uploaded")
    }

    module.exports = router;

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