Node JS AWS S3 文件上传。如何获取公共 URL 响应

如何使用 Node.js 和 AWS S3 实现文件上传并获取公共 URL 响应

npm install aws-sdk

javascript
const AWS = require('aws-sdk');
AWS.config.update({
  accessKeyId: 'YOUR_ACCESS_KEY',
  secretAccessKey: 'YOUR_SECRET_ACCESS_KEY',
  region: 'YOUR_REGION'
});

npm install multer

javascript
const multer = require('multer');
const storage = multer.memoryStorage();
const upload = multer({ storage: storage });

javascript
const express = require('express');
const router = express.Router();
router.post('/upload', upload.single('file'), (req, res) => {
  const file = req.file;
  // 在这里将文件上传到 AWS S3
});

javascript
const s3 = new AWS.S3();
const params = {
  Bucket: 'YOUR_BUCKET_NAME',
  Key: file.originalname,
  Body: file.buffer,
  ACL: 'public-read'
};
s3.upload(params, (err, data) => {
  if (err) {
    console.error(err);
    res.status(500).send('文件上传失败');
  } else {
    const publicUrl = data.Location;
    res.send(publicUrl);
  }
});

javascript
const xhr = new XMLHttpRequest();
xhr.open('POST', '/upload', true);
xhr.onload = function() {
  if (xhr.status === 200) {
    const publicUrl = xhr.responseText;
    // 在这里可以使用公共 URL 来访问上传的文件
  } else {
    console.error('文件上传失败');
  }
};
xhr.send(formData);