[Node.js] AWS SDK - S3

aws-sdk 를 이용하여 AWS S3 를 다뤄보자. (S3 참고글은 [S3] AWS S3 버킷 만들기)

 

---

AWS SDK - S3

---

 

aws-sdk 설치하기

$ npm install aws-sdk

 

▷ lib/s3.js

1. AWS config 세팅하기

const AWS = require('aws-sdk')

const AWS_region = process.env.AWS_REGION || 'ap-northeast-2'
const s3 = new AWS.S3({
  region: AWS_region,
})

 

[putObject]

module.exports.putObject = (bucketName, bucketKey) => async (fileName, data) => {
  const params = {
    Bucket: bucketName,
  }
  if (bucketKey) params.Key = bucketKey
  if (fileName) params.Key = fileName
  if (bucketKey && fileName) params.Key = `${bucketKey}${fileName}`
  if (data) params.Body = Buffer.from(data)

  return await s3
    .putObject(params)
    .promise()
    .then((res) => console.log(res))
}

 

[upload]

module.exports.upload = (bucketName, bucketKey) => async (fileName, data) => {
  const params = {
    Bucket: bucketName,
  }
  if (bucketKey) params.Key = bucketKey
  if (fileName) params.Key = fileName
  if (bucketKey && fileName) params.Key = `${bucketKey}${fileName}`
  if (data) params.Body = Buffer.from(data)
  
  return await s3
    .upload(params)
    .promise()
    .then((res) => console.log(res))
}

 

[listObjects]

module.exports.listObjects = (bucketName, bucketKey) => async () => {
  const params = {
    Bucket: bucketName,
  }
  if (bucketKey) params.Prefix = bucketKey
  
  return await s3.listObjects(params).promise()
}

 

---

 

▷ index.js

 

[putObject] Example#1

const { putObject, upload } = require('./lib/s3')

;(async () => {
  const bucketName = `yonikim-bucket`
  const bucketKey = `test/`

  await putObject(bucketName, bucketKey)()
})()

 

AWS S3 > yonikim-bucket > test 폴더가 생긴다. 

 

 

[putObject] Example#2

const { putObject, upload } = require('./lib/s3')

;(async () => {
  const bucketName = `yonikim-bucket`
  // const bucketKey = `test/`
  
  const fileName = 'test2.txt'
  const data = 'Hello, YONIKIM WORLD'

  await putObject(bucketName)(fileName, data)
})()

 

AWS S3 > yonikim-bucket > test2.txt 파일이 생긴다. 

 

---

 

[upload] Example#1

const { putObject, upload } = require('./lib/s3')

;(async () => {
  const bucketName = `yonikim-bucket`
  const bucketKey = `test/`

  const fileName = 'test.txt'
  const data = 'Hello, YONIKIM WORLD'
  
  await upload(bucketName, bucketKey)(fileName, data)
})()

 

AWS S3 > yonikim-bucket > test > test.txt 파일이 생긴다.

[다운로드] 받아서 확인해 보면 data 가 잘 출력되는 걸 확인할 수 있다.

 

---

 

[listObjects] Example#1

const { putObject, upload, listObjects } = require('./lib/s3')

;(async () => {
  const bucketName = `yonikim-bucket`
  const bucketKey = `test/`

  const s3List = await listObjects(bucketName)()
  console.log(s3List)
})()

 

 

[listObjects] Example#2

const { putObject, upload, listObjects } = require('./lib/s3')

;(async () => {
  const bucketName = `yonikim-bucket`
  const bucketKey = `test/`

  const s3List = await listObjects(bucketName, bucketKey)()
  console.log(s3List)
})()