blob: 1b6b6692b68e02a2ccc20f5d2c95994136b22fde [file] [log] [blame]
/*
* Copyright (C) 2013 Google Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "core/html/parser/HTMLResourcePreloader.h"
#include "core/dom/Document.h"
#include "core/fetch/FetchInitiatorInfo.h"
#include "core/fetch/ResourceFetcher.h"
#include "core/loader/DocumentLoader.h"
#include "platform/Histogram.h"
#include "public/platform/Platform.h"
#include <memory>
namespace blink {
inline HTMLResourcePreloader::HTMLResourcePreloader(Document& document)
: m_document(document)
{
}
HTMLResourcePreloader* HTMLResourcePreloader::create(Document& document)
{
return new HTMLResourcePreloader(document);
}
DEFINE_TRACE(HTMLResourcePreloader)
{
visitor->trace(m_document);
}
static void preconnectHost(PreloadRequest* request, const NetworkHintsInterface& networkHintsInterface)
{
ASSERT(request);
ASSERT(request->isPreconnect());
KURL host(request->baseURL(), request->resourceURL());
if (!host.isValid() || !host.protocolIsInHTTPFamily())
return;
networkHintsInterface.preconnectHost(host, request->crossOrigin());
}
void HTMLResourcePreloader::preload(std::unique_ptr<PreloadRequest> preload, const NetworkHintsInterface& networkHintsInterface)
{
if (preload->isPreconnect()) {
preconnectHost(preload.get(), networkHintsInterface);
return;
}
// TODO(yoichio): Should preload if document is imported.
if (!m_document->loader())
return;
FetchRequest request = preload->resourceRequest(m_document);
// TODO(dgozman): This check should go to HTMLPreloadScanner, but this requires
// making Document::completeURLWithOverride logic to be statically accessible.
if (request.url().protocolIsData())
return;
if (preload->resourceType() == Resource::Script || preload->resourceType() == Resource::CSSStyleSheet || preload->resourceType() == Resource::ImportResource)
request.setCharset(preload->charset().isEmpty() ? m_document->characterSet().getString() : preload->charset());
request.setForPreload(true, preload->discoveryTime());
int duration = static_cast<int>(1000 * (monotonicallyIncreasingTime() - preload->discoveryTime()));
DEFINE_STATIC_LOCAL(CustomCountHistogram, preloadDelayHistogram, ("WebCore.PreloadDelayMs", 0, 2000, 20));
preloadDelayHistogram.count(duration);
m_document->loader()->startPreload(preload->resourceType(), request);
}
} // namespace blink