1 files changed, 86 insertions, 0 deletions
diff --git a/dom/html/nsHTMLDNSPrefetch.h b/dom/html/nsHTMLDNSPrefetch.h
new file mode 100644
index 0000000000..11429e46c0
--- /dev/null
+++ b/dom/html/nsHTMLDNSPrefetch.h
@@ -0,0 +1,86 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsHTMLDNSPrefetch_h___
+#define nsHTMLDNSPrefetch_h___
+
+#include "nsCOMPtr.h"
+#include "nsIRequest.h"
+#include "nsString.h"
+#include "nsWeakReference.h"
+
+class nsITimer;
+namespace mozilla {
+
+class OriginAttributes;
+
+namespace dom {
+class Document;
+class Link;
+}  // namespace dom
+
+namespace net {
+class NeckoParent;
+}  // namespace net
+}  // namespace mozilla
+
+class nsHTMLDNSPrefetch {
+ public:
+  // The required aDocument parameter is the context requesting the prefetch -
+  // under certain circumstances (e.g. headers, or security context) associated
+  // with the context the prefetch will not be performed.
+  static bool IsAllowed(mozilla::dom::Document* aDocument);
+
+  static nsresult Initialize();
+  static nsresult Shutdown();
+
+  // Call one of the Prefetch* methods to start the lookup.
+  //
+  // The URI versions will defer DNS lookup until pageload is
+  // complete, while the string versions submit the lookup to
+  // the DNS system immediately. The URI version is somewhat lighter
+  // weight, but its request is also more likely to be dropped due to a
+  // full queue and it may only be used from the main thread.
+  //
+  // If you are planning to use the methods with the OriginAttributes param, be
+  // sure that you pass a partitioned one. See StoragePrincipalHelper.h to know
+  // more.
+
+  enum class Priority {
+    Low,
+    Medium,
+    High,
+  };
+  static nsresult Prefetch(mozilla::dom::Link* aElement, Priority);
+  static nsresult Prefetch(
+      const nsAString& host, bool isHttps,
+      const mozilla::OriginAttributes& aPartitionedPrincipalOriginAttributes,
+      nsIRequest::TRRMode aTRRMode, Priority);
+  static nsresult CancelPrefetch(
+      const nsAString& host, bool isHttps,
+      const mozilla::OriginAttributes& aPartitionedPrincipalOriginAttributes,
+      nsIRequest::TRRMode aTRRMode, Priority, nsresult aReason);
+  static nsresult CancelPrefetch(mozilla::dom::Link* aElement,
+                                 Priority, nsresult aReason);
+
+  static void LinkDestroyed(mozilla::dom::Link* aLink);
+
+ private:
+  static uint32_t PriorityToDNSServiceFlags(Priority);
+
+  static nsresult Prefetch(
+      const nsAString& host, bool isHttps,
+      const mozilla::OriginAttributes& aPartitionedPrincipalOriginAttributes,
+      uint32_t flags);
+  static nsresult CancelPrefetch(
+      const nsAString& hostname, bool isHttps,
+      const mozilla::OriginAttributes& aPartitionedPrincipalOriginAttributes,
+      uint32_t flags, nsresult aReason);
+
+  friend class mozilla::net::NeckoParent;
+};
+
+#endif