fix：浏览器文件下载问题修复

app/main.py

@@ -205,6 +205,7 @@ def get_version_files(version_id: str, flat: bool = False, db: Session = Depends
 
 # ==================== File APIs ====================
 
+import urllib.parse
 from fastapi.responses import RedirectResponse  # noqa: E811
 from app.services.oss_client import oss_client
 
@@ -230,13 +231,24 @@ def get_file_url(file_id: int, db: Session = Depends(get_db)):
 
 @app.get("/files/{file_id}/content")
 def get_file_content(file_id: int, db: Session = Depends(get_db)):
-    """Redirect to CDN URL for file download."""
+    """Redirect to CDN URL for file download with forced attachment header."""
     file_record = db.query(DataFile).filter(DataFile.id == file_id).first()
     if not file_record:
         raise HTTPException(status_code=404, detail="File not found")
 
     cdn_url = oss_client.get_cdn_url(file_record.storage_path)
-    return RedirectResponse(url=cdn_url)
+    
+    # Try to force download by adding Aliyun OSS specific query parameter
+    # This works for Aliyun OSS even on custom domains if not explicitly disabled
+    filename = os.path.basename(file_record.relative_path)
+    quoted_filename = urllib.parse.quote(filename)
+    # Using both filename and filename* for maximum compatibility
+    disposition = f"attachment; filename=\"{quoted_filename}\"; filename*=UTF-8''{quoted_filename}"
+    
+    separator = "&" if "?" in cdn_url else "?"
+    download_url = f"{cdn_url}{separator}response-content-disposition={urllib.parse.quote(disposition)}"
+    
+    return RedirectResponse(url=download_url)
 
 if __name__ == "__main__":
     import uvicorn

app/static/index.html

@@ -681,7 +681,7 @@
               <div class="item-name">${esc(node.name)}</div>
               <div class="item-desc">${formatSize(node.size)}${node.file_type ? ' · ' + node.file_type : ''}</div>
             </div>
-            <a class="btn-download" href="/files/${node.id}/content" target="_blank" onclick="event.stopPropagation();">
+            <a class="btn-download" href="/files/${node.id}/content" download="${esc(node.name)}" onclick="event.stopPropagation();">
               ${SVG.download} 下载
             </a>
           </div>`;