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diff --git a/archived/projt-launcher/launcher/net/NetUtils.h b/archived/projt-launcher/launcher/net/NetUtils.h
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+// SPDX-License-Identifier: GPL-3.0-only
+// SPDX-FileCopyrightText: 2026 Project Tick
+// SPDX-FileContributor: Project Tick Team
+/*
+ *  ProjT Launcher - Minecraft Launcher
+ *  Copyright (C) 2026 Project Tick
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, version 3.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * === Upstream License Block (Do Not Modify) ==============================
+ *
+ *
+ *
+ *  Prism Launcher - Minecraft Launcher
+ *  Copyright (c) 2022 Sefa Eyeoglu <contact@scrumplex.net>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, version 3.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, write to the Free Software Foundation,
+ *  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * ======================================================================== */
+
+#pragma once
+
+#include <QNetworkReply>
+#include <QSet>
+
+namespace Net
+{
+	inline bool isApplicationError(QNetworkReply::NetworkError x)
+	{
+		// Mainly taken from https://github.com/qt/qtbase/blob/dev/src/network/access/qhttpthreaddelegate.cpp
+		static QSet<QNetworkReply::NetworkError> errors = { QNetworkReply::ProtocolInvalidOperationError,
+															QNetworkReply::AuthenticationRequiredError,
+															QNetworkReply::ContentAccessDenied,
+															QNetworkReply::ContentNotFoundError,
+															QNetworkReply::ContentOperationNotPermittedError,
+															QNetworkReply::ProxyAuthenticationRequiredError,
+															QNetworkReply::ContentConflictError,
+															QNetworkReply::ContentGoneError,
+															QNetworkReply::InternalServerError,
+															QNetworkReply::OperationNotImplementedError,
+															QNetworkReply::ServiceUnavailableError,
+															QNetworkReply::UnknownServerError,
+															QNetworkReply::UnknownContentError };
+		return errors.contains(x);
+	}
+} // namespace Net