支持fastapi服务

api/routers/files.py

@@ -0,0 +1,72 @@
+"""
+File service endpoints
+
+Provides access to generated files (videos, images, audio).
+"""
+
+from pathlib import Path
+from fastapi import APIRouter, HTTPException
+from fastapi.responses import FileResponse
+from loguru import logger
+
+router = APIRouter(prefix="/files", tags=["Files"])
+
+
+@router.get("/{file_path:path}")
+async def get_file(file_path: str):
+    """
+    Get file by path
+    
+    Serves files from the output directory only.
+    
+    - **file_path**: File name or path (e.g., "abc123.mp4" or "subfolder/abc123.mp4")
+    
+    Returns file for download or preview.
+    """
+    try:
+        # Automatically prepend "output/" to the path
+        full_path = f"output/{file_path}"
+        abs_path = Path.cwd() / full_path
+        
+        if not abs_path.exists():
+            raise HTTPException(status_code=404, detail=f"File not found: {file_path}")
+        
+        if not abs_path.is_file():
+            raise HTTPException(status_code=400, detail=f"Path is not a file: {file_path}")
+        
+        # Security: only allow access to output directory
+        try:
+            rel_path = abs_path.relative_to(Path.cwd())
+            if not str(rel_path).startswith("output"):
+                raise HTTPException(status_code=403, detail="Access denied: only output directory is accessible")
+        except ValueError:
+            raise HTTPException(status_code=403, detail="Access denied")
+        
+        # Determine media type
+        suffix = abs_path.suffix.lower()
+        media_types = {
+            '.mp4': 'video/mp4',
+            '.mp3': 'audio/mpeg',
+            '.wav': 'audio/wav',
+            '.png': 'image/png',
+            '.jpg': 'image/jpeg',
+            '.jpeg': 'image/jpeg',
+            '.gif': 'image/gif',
+        }
+        media_type = media_types.get(suffix, 'application/octet-stream')
+        
+        # Use inline disposition for browser preview
+        return FileResponse(
+            path=str(abs_path),
+            media_type=media_type,
+            headers={
+                "Content-Disposition": f'inline; filename="{abs_path.name}"'
+            }
+        )
+        
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error(f"File access error: {e}")
+        raise HTTPException(status_code=500, detail=str(e))
+