app/main.py

@@ -1,7 +1,8 @@
 from pathlib import Path
 
-from fastapi import FastAPI
+from fastapi import FastAPI, Request, Response
 from fastapi.staticfiles import StaticFiles
+from starlette.middleware.base import BaseHTTPMiddleware
 
 from app.config import UPLOAD_DIR
 from app.database import init_db
@@ -10,19 +11,20 @@ from app.routers import web, api
 app = FastAPI(title="Mailova 星笺")
 
 UPLOAD_DIR.mkdir(exist_ok=True)
+app.mount("/static", StaticFiles(directory=str(Path(__file__).resolve().parent / "static")), name="static")
+app.mount("/uploads", StaticFiles(directory=str(UPLOAD_DIR)), name="uploads")
 
 
-# Cache-Control for uploaded images (30 days, immutable — filenames contain UUID)
+# Browser cache: 30 days for uploaded images (they never change)
-@app.middleware("http")
+class CacheControlMiddleware(BaseHTTPMiddleware):
-async def cache_control_middleware(request, call_next):
+    async def dispatch(self, request: Request, call_next):
-    response = await call_next(request)
+        response: Response = await call_next(request)
         if request.url.path.startswith("/uploads/"):
             response.headers["Cache-Control"] = "public, max-age=2592000, immutable"
         return response
 
 
-app.mount("/static", StaticFiles(directory=str(Path(__file__).resolve().parent / "static")), name="static")
+app.add_middleware(CacheControlMiddleware)
-app.mount("/uploads", StaticFiles(directory=str(UPLOAD_DIR)), name="uploads")
 
 app.include_router(web.router)
 app.include_router(api.router)

app/storage.py

@@ -88,13 +88,7 @@ class S3Storage:
         region: str = "auto",
         public_url: str = "",
     ) -> None:
-        try:
         import boto3
-        except ImportError:
-            raise ImportError(
-                "boto3 is required for S3 storage. "
-                "Install it with: pip install boto3"
-            )
 
         self.bucket = bucket
         self.public_url = public_url.rstrip("/")

requirements.txt

@@ -6,4 +6,3 @@ jinja2
 bcrypt
 python-jose[cryptography]
 aiofiles
-boto3