Object Storage

import boto3
from botocore.exceptions import ClientError
from datetime import datetime

# S3 클라이언트 생성
s3 = boto3.client('s3',
    region_name='ap-northeast-2',
    aws_access_key_id='YOUR_ACCESS_KEY',
    aws_secret_access_key='YOUR_SECRET_KEY'
)

# 버킷 생성
s3.create_bucket(
    Bucket='my-app-bucket',
    CreateBucketConfiguration={'LocationConstraint': 'ap-northeast-2'}
)

# 파일 업로드
s3.upload_file(
    'local_file.pdf',
    'my-app-bucket',
    'documents/2024/report.pdf',
    ExtraArgs={
        'ContentType': 'application/pdf',
        'Metadata': {'author': 'kaitrust', 'version': '1.0'}
    }
)

# Presigned URL 생성 (1시간 유효)
url = s3.generate_presigned_url(
    'get_object',
    Params={'Bucket': 'my-app-bucket', 'Key': 'documents/2024/report.pdf'},
    ExpiresIn=3600
)
print(f"Download URL: {url}")

# 객체 목록 조회 (페이지네이션)
paginator = s3.get_paginator('list_objects_v2')
for page in paginator.paginate(Bucket='my-app-bucket', Prefix='documents/'):
    for obj in page.get('Contents', []):
        print(f"{obj['Key']} - {obj['Size']} bytes")

# 객체 삭제
s3.delete_object(Bucket='my-app-bucket', Key='documents/2024/report.pdf')

import {
  S3Client,
  PutObjectCommand,
  GetObjectCommand,
  ListObjectsV2Command
} from '@aws-sdk/client-s3';
import { getSignedUrl } from '@aws-sdk/s3-request-presigner';

// S3 클라이언트 설정
const s3 = new S3Client({
  region: 'ap-northeast-2',
  credentials: {
    accessKeyId: process.env.AWS_ACCESS_KEY_ID,
    secretAccessKey: process.env.AWS_SECRET_ACCESS_KEY
  }
});

// 파일 업로드
async function uploadFile(buffer, key, contentType) {
  const command = new PutObjectCommand({
    Bucket: 'my-app-bucket',
    Key: key,
    Body: buffer,
    ContentType: contentType,
    CacheControl: 'max-age=31536000'
  });

  await s3.send(command);
  return `https://my-app-bucket.s3.ap-northeast-2.amazonaws.com/${key}`;
}

// Presigned URL 생성
async function getPresignedUrl(key, expiresIn = 3600) {
  const command = new GetObjectCommand({
    Bucket: 'my-app-bucket',
    Key: key
  });

  return await getSignedUrl(s3, command, { expiresIn });
}

// 객체 목록 조회
async function listObjects(prefix) {
  const command = new ListObjectsV2Command({
    Bucket: 'my-app-bucket',
    Prefix: prefix,
    MaxKeys: 100
  });

  const response = await s3.send(command);
  return response.Contents || [];
}

// 사용 예시
const url = await uploadFile(imageBuffer, 'images/photo.jpg', 'image/jpeg');
console.log('Uploaded:', url);

# 버킷 생성
aws s3 mb s3://my-app-bucket --region ap-northeast-2

# 파일 업로드
aws s3 cp ./local_file.pdf s3://my-app-bucket/documents/

# 디렉토리 동기화
aws s3 sync ./build s3://my-app-bucket/static/ --delete

# 객체 목록 조회
aws s3 ls s3://my-app-bucket/documents/ --recursive --human-readable

# Presigned URL 생성 (1시간)
aws s3 presign s3://my-app-bucket/documents/report.pdf --expires-in 3600

# 스토리지 클래스 변경 (Glacier로)
aws s3 cp s3://my-app-bucket/backups/old-data.zip \
  s3://my-app-bucket/backups/old-data.zip \
  --storage-class GLACIER

# 버킷 정책 설정 (퍼블릭 읽기)
aws s3api put-bucket-policy --bucket my-app-bucket --policy '{
  "Version": "2012-10-17",
  "Statement": [{
    "Effect": "Allow",
    "Principal": "*",
    "Action": "s3:GetObject",
    "Resource": "arn:aws:s3:::my-app-bucket/public/*"
  }]
}'

# Lifecycle 정책 설정 (90일 후 삭제)
aws s3api put-bucket-lifecycle-configuration \
  --bucket my-app-bucket \
  --lifecycle-configuration file://lifecycle.json