implement S3 garage on the backend

apps/backend/app/routers/media.py

@@ -0,0 +1,23 @@
+from botocore.exceptions import ClientError
+from fastapi import APIRoute, APIRouter, HTTPException
+from fastapi.responses import StreamingResponse
+
+from app.s3 import BUCKET_NAME, s3_client
+
+router = APIRouter(prefix="/media", tags=["media"])
+
+
+@router.get("/{file_path:path}")
+async def get_media(file_path: str):
+    try:
+        s3_object = s3_client.get_object(Bucket=BUCKET_NAME, Key=file_path)
+
+        return StreamingResponse(
+            content=s3_object["Body"].iter_chunks(),
+            media_type=s3_object.get("ContentType", "application/octet-stream"),
+            headers={"Cache-Control": "public, max-age=86400"},
+        )
+    except ClientError as e:
+        if e.response["Error"]["Code"] in ["NoSuchKey", "404"]:
+            raise HTTPException(status_code=404, detail="Fichier introuvable")
+        raise HTTPException(status_code=500, detail="Erreur serveur S3")