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/*
* 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 "config.h"
#include "core/html/parser/HTMLResourcePreloader.h"
#include "core/dom/Document.h"
#include "core/html/HTMLImport.h"
#include "core/loader/cache/FetchInitiatorInfo.h"
#include "core/loader/cache/ResourceFetcher.h"
#include "core/css/MediaList.h"
#include "core/css/MediaQueryEvaluator.h"
#include "core/platform/HistogramSupport.h"
#include "core/rendering/RenderObject.h"
namespace WebCore {
bool PreloadRequest::isSafeToSendToAnotherThread() const
{
return m_initiatorName.isSafeToSendToAnotherThread()
&& m_charset.isSafeToSendToAnotherThread()
&& m_resourceURL.isSafeToSendToAnotherThread()
&& m_mediaAttribute.isSafeToSendToAnotherThread()
&& m_baseURL.isSafeToSendToAnotherThread();
}
KURL PreloadRequest::completeURL(Document* document)
{
return document->completeURL(m_resourceURL, m_baseURL.isEmpty() ? document->url() : m_baseURL);
}
FetchRequest PreloadRequest::resourceRequest(Document* document)
{
ASSERT(isMainThread());
FetchInitiatorInfo initiatorInfo;
initiatorInfo.name = m_initiatorName;
initiatorInfo.position = m_initiatorPosition;
FetchRequest request(ResourceRequest(completeURL(document)), initiatorInfo);
// FIXME: It's possible CORS should work for other request types?
if (m_resourceType == Resource::Script)
request.mutableResourceRequest().setAllowCookies(m_crossOriginModeAllowsCookies);
return request;
}
void HTMLResourcePreloader::takeAndPreload(PreloadRequestStream& r)
{
PreloadRequestStream requests;
requests.swap(r);
for (PreloadRequestStream::iterator it = requests.begin(); it != requests.end(); ++it)
preload(it->release());
}
static bool mediaAttributeMatches(Frame* frame, RenderStyle* renderStyle, const String& attributeValue)
{
RefPtr<MediaQuerySet> mediaQueries = MediaQuerySet::create(attributeValue);
MediaQueryEvaluator mediaQueryEvaluator("screen", frame, renderStyle);
return mediaQueryEvaluator.eval(mediaQueries.get());
}
void HTMLResourcePreloader::preload(PassOwnPtr<PreloadRequest> preload)
{
Document* executingDocument = m_document->import() ? m_document->import()->master() : m_document;
Document* loadingDocument = m_document;
ASSERT(executingDocument->frame());
ASSERT(executingDocument->renderer());
ASSERT(executingDocument->renderer()->style());
if (!preload->media().isEmpty() && !mediaAttributeMatches(executingDocument->frame(), executingDocument->renderer()->style(), preload->media()))
return;
FetchRequest request = preload->resourceRequest(m_document);
HistogramSupport::histogramCustomCounts("WebCore.PreloadDelayMs", static_cast<int>(1000 * (monotonicallyIncreasingTime() - preload->discoveryTime())), 0, 2000, 20);
loadingDocument->fetcher()->preload(preload->resourceType(), request, preload->charset());
}
}
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