Set up S3 with Node.js

1. Create Bucket

2. Create Police for the web app user

   • server : S3
     • read: GetObject
     • write: PutObject, DeleteObject
   • resources:
     • the name of the bucket for the web app

3. Create IAM account user for the web app

   • create a user represent for the web application. (Access Key - Programmatic access)
   • Copy the access key and secret key

4. install AWS SDK for node app

5. setup S3 client in the project

   // init S3 client
   const s3 = S3Client({
       credentials:{
           accessKeyId : accessKey,
           secretAeecssKey: secretAccessKey,
       },
       region: bucketRegion
   });
   
   // create a post with single image upload to s3 bucket
   app.post('/posts', upload.single('image'), asnc(req, res)=>{
       const params = {
           Bucket: bucketName,
           Key: req.file.originalName,
           Body: req.file.buffer,
           ContentType: req.file.mimetype
       }
   
       const command = new PutObjectCommand(params)
   
       try{
           const result = await s3.send(command)
           const s3Json = await 
       }
   
       res.json({
   
       })
   
   })