使用 multer-s3 nodejs 将图像上传到亚马逊 s3

Question

我正在尝试使用 multer-s3 将图像上传到 amazon s3，但出现此错误：

TypeError：预期 opts.s3 为对象 node_modules/multer-s3/index.js:69:20

这是我的服务器代码：

 var upload = multer({
    storage: s3({
        dirname: '/',
        bucket: 'bucket',
        secretAccessKey: 'key',
        accessKeyId: 'key',
        region: 'us-west-2',
        filename: function (req, file, cb) {
            cb(null, file.originalname);
        }
    })
});

app.post('/upload', upload.array('file'), function (req, res, next) {
    res.send("Uploaded!");
});

为什么我收到此错误？

原文由 mBlaze 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

[2022 年 3 月更新] 迄今为止运行良好，现在还显示上传的文件公共 URL。

完整 且有效的 节点作弊 |使用可用的 multer-s3 上传到 s3 。

代码：

 var express = require('express'),
    aws = require('aws-sdk'),
    bodyParser = require('body-parser'),
    multer = require('multer'),
    multerS3 = require('multer-s3');

aws.config.update({
    secretAccessKey: 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX',
    accessKeyId: 'XXXXXXXXXXXXXXX',
    region: 'us-east-1'
});

var app = express(),
    s3 = new aws.S3();

app.use(bodyParser.json());

var upload = multer({
    storage: multerS3({
        s3: s3,
        acl: 'public-read',
        bucket: 'bucket-name',
        key: function (req, file, cb) {
            console.log(file);
            cb(null, file.originalname); //use Date.now() for unique file keys
        }
    })
});

//open in browser to see upload form
app.get('/', function (req, res) {
    res.sendFile(__dirname + '/index.html');//index.html is inside node-cheat
});

//use by upload form
app.post('/upload', upload.array('upl', 25), function (req, res, next) {
    res.send({
        message: "Uploaded!",
        urls: req.files.map(function(file) {
            return {url: file.location, name: file.key, type: file.mimetype, size: file.size};
        })
    });
});

app.listen(3000, function () {
    console.log('Example app listening on port 3000!');
});

_对于完整的回购_：

克隆节点作弊 express_multer_s3 ，运行 node app 后跟 npm install express body-parser aws-sdk multer multer-s3 。

乐于助人！

原文由 Zeeshan Hassan Memon 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 2

@V31 回答得很好，我仍然想加 2 美分。

为了更好的代码组织和调试目的，我相信将一项责任保存在一个文件中。

我创建了一个用于上传的文件 upload.js 。

 require('dotenv').config();
const AWS = require('aws-sdk');
const multer = require('multer');
const multerS3 = require('multer-s3');

const s3Config = new AWS.S3({
    accessKeyId: process.env.AWS_IAM_USER_KEY,
    secretAccessKey: process.env.AWS_IAM_USER_SECRET,
    Bucket: process.env.AWS_BUCKET_NAME
  });

const fileFilter = (req, file, cb) => {
    if (file.mimetype === 'image/jpeg' || file.mimetype === 'image/png') {
        cb(null, true)
    } else {
        cb(null, false)
    }
}

// this is just to test locally if multer is working fine.
const storage = multer.diskStorage({
    destination: (req, res, cb) => {
        cb(null, 'src/api/media/profiles')
    },
    filename: (req, file, cb) => {
        cb(null, new Date().toISOString() + '-' + file.originalname)
    }
})

const multerS3Config = multerS3({
    s3: s3Config,
    bucket: process.env.AWS_BUCKET_NAME,
    metadata: function (req, file, cb) {
        cb(null, { fieldName: file.fieldname });
    },
    key: function (req, file, cb) {
        console.log(file)
        cb(null, new Date().toISOString() + '-' + file.originalname)
    }
});

const upload = multer({
    storage: multerS3Config,
    fileFilter: fileFilter,
    limits: {
        fileSize: 1024 * 1024 * 5 // we are allowing only 5 MB files
    }
})

exports.profileImage = upload;

这是在我的路线中导入的 routes.js

 const express = require('express');

const ProfileController = require('../profile/controller');
const { profileImage } = require('../utils/upload.js');

 const routes = (app) => {
    const apiRoutes = express.Router();

    apiRoutes.use('/profile', profileRoutes);
    profileRoutes.post('/',profileImage.single('profileImage'), ProfileController.saveProfile);

    app.use('/api', apiRoutes);

 }

module.exports = routes

帖子正文的邮递员屏幕截图

原文由 Anjum…. 发布，翻译遵循 CC BY-SA 4.0 许可协议