LibWeb/CSP: Implement the form-action directive

Author: https://github.com/Lubrsi
Commit: f9247116b1
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5626

Libraries/LibWeb/ContentSecurityPolicy/Directives/FormActionDirective.h

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2024, Luke Wilde <luke@ladybird.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibWeb/ContentSecurityPolicy/Directives/Directive.h>
+
+namespace Web::ContentSecurityPolicy::Directives {
+
+// https://w3c.github.io/webappsec-csp/#directive-form-action
+class FormActionDirective final : public Directive {
+    GC_CELL(FormActionDirective, Directive)
+    GC_DECLARE_ALLOCATOR(FormActionDirective);
+
+public:
+    virtual ~FormActionDirective() = default;
+
+    virtual Result pre_navigation_check(GC::Ref<Fetch::Infrastructure::Request const>, NavigationType, GC::Ref<Policy const>) const override;
+
+private:
+    FormActionDirective(String name, Vector<String> value);
+};
+
+}