NCP Object Storage CORS 오류

---

🚨 문제 상황

Access to fetch at '<https://kr.object.ncloudstorage.com/dev-optizen-upload/audios/2025/12/22/2791/USER_54669b8e.wav>' from origin '<http://localhost:3000>' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.Understand this error
useWavesurfer.ts:54  GET <https://kr.object.ncloudstorage.com/dev-optizen-upload/audios/2025/12/22/2791/USER_54669b8e.wav> net::ERR_FAILED 200 (OK)

• 프론트에서 스토리지 URL로 접근할 때 CORS 오류 발생

---

✅ 해결 방법

PutBucketCORS

• 버킷 공개 설정
• API로 CORS 설정

🧑🏻‍💻 NCP Object Storage CORS 설정 명령어 정리

1. s3cmd 설치

brew install s3cmd

2. ~/.s3cfg 설정 파일 생성

cat > ~/.s3cfg << 'EOF'
[default]
access_key = YOUR_ACCESS_KEY
secret_key = YOUR_SECRET_KEY
host_base = kr.object.ncloudstorage.com
host_bucket = %(bucket)s.kr.object.ncloudstorage.com
use_https = True
EOF

3. cors.xml 파일 생성

echo '<?xml version="1.0" encoding="UTF-8"?>
<CORSConfiguration xmlns="<http://s3.amazonaws.com/doc/2006-03-01/>">
  <CORSRule>
    <AllowedOrigin><http://localhost:3000></AllowedOrigin>
    <AllowedOrigin><https://dev-chat-socc.logosai.co.kr></AllowedOrigin>
    <AllowedMethod>GET</AllowedMethod>
    <AllowedMethod>HEAD</AllowedMethod>
    <AllowedHeader>*</AllowedHeader>
    <MaxAgeSeconds>3600</MaxAgeSeconds>
  </CORSRule>
</CORSConfiguration>' > cors.xml

4. CORS 적용

s3cmd setcors cors.xml s3://dev-optigen-upload