estelam ticket, varizha , others

apps/attachments/delivery.py

@@ -19,3 +19,16 @@ def signed_media_redirect(relative_path, *, download=False, lifetime=300):
     if download:
         query["download"] = "1"
     return HttpResponseRedirect(f"{uri}?{urlencode(query)}")
+
+
+def attachment_response(attachment, *, download=False):
+    """Deliver authorized bytes; confidential responses never use bearer URLs."""
+    import mimetypes
+    from django.http import FileResponse
+    if settings.USE_NGINX_MEDIA and not attachment.relative_path.startswith("dispatch-responses/"):
+        return signed_media_redirect(attachment.relative_path, download=download)
+    content_type = attachment.mime_type or mimetypes.guess_type(attachment.original_name)[0] or "application/octet-stream"
+    response = FileResponse(attachment.file.open("rb"), content_type=content_type,
+        as_attachment=download, filename=attachment.original_name)
+    response["X-Content-Type-Options"] = "nosniff"
+    return response