init

app/upload/utils.py

@@ -0,0 +1,26 @@
+import magic
+from upload.models import AbstractFile
+from functools import lru_cache
+
+@lru_cache(maxsize=128)
+def get_mimetype_class_map():
+    mapping = {}
+    for cls in AbstractFile.__subclasses__():
+        for mt in getattr(cls, 'allowed_mimetypes', []):
+            mapping[mt] = cls
+    return mapping
+
+
+def get_mimetype(file_obj):
+    mimetype = magic.from_buffer(file_obj.read(2048), mime=True)
+    file_obj.seek(0)
+    return mimetype
+
+
+def get_upload_class_for_mimetype(mimetype):
+    mimetype = mimetype.lower().replace('x-', '')  # normalisation légère
+    return get_mimetype_class_map().get(mimetype)
+
+
+def create_upload(request, file_obj):
+    pass