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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 */
#ifndef nsDNSPrefetch_h___
#define nsDNSPrefetch_h___
#include <functional>
#include "nsIWeakReferenceUtils.h"
#include "nsString.h"
#include "mozilla/TimeStamp.h"
#include "mozilla/Attributes.h"
#include "mozilla/BasePrincipal.h"
#include "nsIDNSListener.h"
#include "nsIRequest.h"
class nsIURI;
class nsIDNSService;
class nsIDNSHTTPSSVCRecord;
class nsDNSPrefetch final : public nsIDNSListener {
~nsDNSPrefetch() = default;
nsDNSPrefetch(nsIURI* aURI, mozilla::OriginAttributes& aOriginAttributes,
nsIRequest::TRRMode aTRRMode, nsIDNSListener* aListener,
bool storeTiming);
// For fetching HTTPS RR.
nsDNSPrefetch(nsIURI* aURI, mozilla::OriginAttributes& aOriginAttributes,
nsIRequest::TRRMode aTRRMode);
bool TimingsValid() const {
return !mStartTimestamp.IsNull() && !mEndTimestamp.IsNull();
// Only use the two timings if TimingsValid() returns true
const mozilla::TimeStamp& StartTimestamp() const { return mStartTimestamp; }
const mozilla::TimeStamp& EndTimestamp() const { return mEndTimestamp; }
static nsresult Initialize(nsIDNSService* aDNSService);
static nsresult Shutdown();
// Call one of the following methods to start the Prefetch.
nsresult PrefetchHigh(bool refreshDNS = false);
nsresult PrefetchMedium(bool refreshDNS = false);
nsresult PrefetchLow(bool refreshDNS = false);
nsresult FetchHTTPSSVC(
bool aRefreshDNS, bool aPrefetch,
std::function<void(nsIDNSHTTPSSVCRecord*)>&& aCallback);
nsCString mHostname;
int32_t mPort{-1};
mozilla::OriginAttributes mOriginAttributes;
bool mStoreTiming;
nsIRequest::TRRMode mTRRMode;
mozilla::TimeStamp mStartTimestamp;
mozilla::TimeStamp mEndTimestamp;
nsWeakPtr mListener;
nsresult Prefetch(uint32_t flags);