اضافه شدن قابلیت مقایسه شماتیک

backend/app/uploads.py

@@ -0,0 +1,20 @@
+"""Shared bounded native schematic upload validation."""
+from fastapi import HTTPException
+from .config import settings
+from .parser.record_decoder import ParseError,detect_format
+
+async def read_schematic(file):
+    try:
+        name=(file.filename or '').replace('\\','/').rsplit('/',1)[-1]
+        name=''.join(c for c in name if c.isprintable())[:255]
+        if not name.lower().endswith('.schdoc'):
+            raise HTTPException(415,{'code':'unsupported_file_type','message':'Upload a .SchDoc file'})
+        body=bytearray()
+        while chunk:=await file.read(1024*1024):
+            body.extend(chunk)
+            if len(body)>settings().max_upload_bytes:
+                raise HTTPException(413,{'code':'upload_too_large','message':'Schematic exceeds configured upload size'})
+        try:detect_format(bytes(body))
+        except ParseError as exc:raise HTTPException(422,{'code':'invalid_schematic','message':str(exc)}) from exc
+        return name,bytes(body)
+    finally:await file.close()