107 lines
3.0 KiB
C++
107 lines
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsDNSPrefetch.h"
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#include "nsCOMPtr.h"
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#include "nsString.h"
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#include "nsThreadUtils.h"
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#include "nsIDNSListener.h"
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#include "nsIDNSService.h"
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#include "nsICancelable.h"
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#include "nsIURI.h"
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static nsIDNSService *sDNSService = nullptr;
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nsresult
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nsDNSPrefetch::Initialize(nsIDNSService *aDNSService)
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{
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NS_IF_RELEASE(sDNSService);
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sDNSService = aDNSService;
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NS_IF_ADDREF(sDNSService);
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return NS_OK;
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}
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nsresult
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nsDNSPrefetch::Shutdown()
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{
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NS_IF_RELEASE(sDNSService);
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return NS_OK;
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}
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nsDNSPrefetch::nsDNSPrefetch(nsIURI *aURI,
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nsIDNSListener *aListener,
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bool storeTiming)
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: mStoreTiming(storeTiming)
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, mListener(do_GetWeakReference(aListener))
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{
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aURI->GetAsciiHost(mHostname);
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}
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nsresult
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nsDNSPrefetch::Prefetch(uint16_t flags)
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{
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if (mHostname.IsEmpty())
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return NS_ERROR_NOT_AVAILABLE;
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if (!sDNSService)
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return NS_ERROR_NOT_AVAILABLE;
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nsCOMPtr<nsICancelable> tmpOutstanding;
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if (mStoreTiming)
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mStartTimestamp = mozilla::TimeStamp::Now();
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// If AsyncResolve fails, for example because prefetching is disabled,
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// then our timing will be useless. However, in such a case,
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// mEndTimestamp will be a null timestamp and callers should check
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// TimingsValid() before using the timing.
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nsCOMPtr<nsIThread> mainThread = do_GetMainThread();
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return sDNSService->AsyncResolve(mHostname,
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flags | nsIDNSService::RESOLVE_SPECULATE,
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this, mainThread,
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getter_AddRefs(tmpOutstanding));
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}
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nsresult
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nsDNSPrefetch::PrefetchLow(bool refreshDNS)
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{
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return Prefetch(nsIDNSService::RESOLVE_PRIORITY_LOW |
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(refreshDNS ? nsIDNSService::RESOLVE_BYPASS_CACHE : 0));
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}
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nsresult
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nsDNSPrefetch::PrefetchMedium(bool refreshDNS)
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{
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return Prefetch(nsIDNSService::RESOLVE_PRIORITY_MEDIUM |
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(refreshDNS ? nsIDNSService::RESOLVE_BYPASS_CACHE : 0));
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}
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nsresult
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nsDNSPrefetch::PrefetchHigh(bool refreshDNS)
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{
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return Prefetch(refreshDNS ?
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nsIDNSService::RESOLVE_BYPASS_CACHE : 0);
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}
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NS_IMPL_ISUPPORTS(nsDNSPrefetch, nsIDNSListener)
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NS_IMETHODIMP
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nsDNSPrefetch::OnLookupComplete(nsICancelable *request,
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nsIDNSRecord *rec,
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nsresult status)
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{
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MOZ_ASSERT(NS_IsMainThread(), "Expecting DNS callback on main thread.");
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if (mStoreTiming) {
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mEndTimestamp = mozilla::TimeStamp::Now();
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}
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nsCOMPtr<nsIDNSListener> listener = do_QueryReferent(mListener);
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if (listener) {
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listener->OnLookupComplete(request, rec, status);
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}
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return NS_OK;
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}
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