Quelle EarlyHintPreconnect.cpp Sprache: C

/* 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/. */

#include "EarlyHintPreconnect.h"

#include "mozilla/CORSMode.h"
#include "mozilla/dom/Element.h"
#include "mozilla/StaticPrefs_network.h"
#include "nsIOService.h"
#include "nsIURI.h"
#include "SpeculativeTransaction.h"

namespace mozilla::net {

namespace {
class EarlyHintsPreConnectOverride : public nsIInterfaceRequestor,
                                     public nsISpeculativeConnectionOverrider {
public:
  NS_DECL_THREADSAFE_ISUPPORTS
  NS_DECL_NSISPECULATIVECONNECTIONOVERRIDER
  NS_DECL_NSIINTERFACEREQUESTOR

  explicit EarlyHintsPreConnectOverride(uint32_t aConnectionLimit)
      : mConnectionLimit(aConnectionLimit) {}

private:
  virtual ~EarlyHintsPreConnectOverride() = default;

  // Only set once on main thread and can be read on multiple threads.
  const uint32_t mConnectionLimit;
};

NS_IMPL_ISUPPORTS(EarlyHintsPreConnectOverride, nsIInterfaceRequestor,
                  nsISpeculativeConnectionOverrider)

NS_IMETHODIMP
EarlyHintsPreConnectOverride::GetInterface(const nsIID& iid, void** result) {
  if (NS_SUCCEEDED(QueryInterface(iid, result)) && *result) {
    return NS_OK;
  }

  return NS_ERROR_NO_INTERFACE;
}

NS_IMETHODIMP
EarlyHintsPreConnectOverride::GetIgnoreIdle(bool* ignoreIdle) {
  *ignoreIdle = true;
  return NS_OK;
}

NS_IMETHODIMP
EarlyHintsPreConnectOverride::GetParallelSpeculativeConnectLimit(
    uint32_t* parallelSpeculativeConnectLimit) {
  *parallelSpeculativeConnectLimit = mConnectionLimit;
  return NS_OK;
}

NS_IMETHODIMP
EarlyHintsPreConnectOverride::GetIsFromPredictor(bool* isFromPredictor) {
  *isFromPredictor = false;
  return NS_OK;
}

NS_IMETHODIMP
EarlyHintsPreConnectOverride::GetAllow1918(bool* allow) {
  *allow = false;
  return NS_OK;
}

}  // namespace

void EarlyHintPreconnect::MaybePreconnect(
    const LinkHeader& aHeader, nsIURI* aBaseURI,
    OriginAttributes&& aOriginAttributes) {
  if (!StaticPrefs::network_early_hints_preconnect_enabled()) {
    return;
  }

  if (!gIOService) {
    return;
  }

  nsCOMPtr<nsIURI> uri;
  if (NS_FAILED(aHeader.NewResolveHref(getter_AddRefs(uri), aBaseURI))) {
    return;
  }

  // only preconnect secure context urls
  if (!uri->SchemeIs("https")) {
    return;
  }

  uint32_t maxPreconnectCount =
      StaticPrefs::network_early_hints_preconnect_max_connections();
  nsCOMPtr<nsIInterfaceRequestor> callbacks =
      new EarlyHintsPreConnectOverride(maxPreconnectCount);
  // Note that the http connection manager will limit the number of
  // connections we can make, so it should be fine we don't check duplicate
  // preconnect attempts here.
  CORSMode corsMode = dom::Element::StringToCORSMode(aHeader.mCrossOrigin);
  gIOService->SpeculativeConnectWithOriginAttributesNative(
      uri, std::move(aOriginAttributes), callbacks, corsMode == CORS_ANONYMOUS);
}

}  // namespace mozilla::net

quality100%

¤ Dauer der Verarbeitung: 0.12 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.