HTMLResourcePreloader.cpp [plain text]
#include "config.h"
#include "HTMLResourcePreloader.h"
#include "CachedResourceLoader.h"
#include "Document.h"
#include "MediaList.h"
#include "MediaQueryEvaluator.h"
#include "RenderView.h"
namespace WebCore {
URL PreloadRequest::completeURL(Document& document)
{
return document.completeURL(m_resourceURL, m_baseURL.isEmpty() ? document.baseURL() : m_baseURL);
}
CachedResourceRequest PreloadRequest::resourceRequest(Document& document)
{
ASSERT(isMainThread());
bool skipContentSecurityPolicyCheck = false;
if (m_resourceType == CachedResource::Type::Script)
skipContentSecurityPolicyCheck = document.contentSecurityPolicy()->allowScriptWithNonce(m_nonceAttribute);
else if (m_resourceType == CachedResource::Type::CSSStyleSheet)
skipContentSecurityPolicyCheck = document.contentSecurityPolicy()->allowStyleWithNonce(m_nonceAttribute);
ResourceLoaderOptions options = CachedResourceLoader::defaultCachedResourceOptions();
if (skipContentSecurityPolicyCheck)
options.contentSecurityPolicyImposition = ContentSecurityPolicyImposition::SkipPolicyCheck;
CachedResourceRequest request { completeURL(document), options };
request.setInitiator(m_initiator);
String crossOriginMode = m_crossOriginMode;
if (m_moduleScript == ModuleScript::Yes) {
if (crossOriginMode.isNull())
crossOriginMode = ASCIILiteral("omit");
}
request.setAsPotentiallyCrossOrigin(crossOriginMode, document);
return request;
}
void HTMLResourcePreloader::preload(PreloadRequestStream requests)
{
for (auto& request : requests)
preload(WTFMove(request));
}
static bool mediaAttributeMatches(Document& document, const RenderStyle* renderStyle, const String& attributeValue)
{
auto mediaQueries = MediaQuerySet::create(attributeValue);
return MediaQueryEvaluator { "screen", document, renderStyle }.evaluate(mediaQueries.get());
}
void HTMLResourcePreloader::preload(std::unique_ptr<PreloadRequest> preload)
{
ASSERT(m_document.frame());
ASSERT(m_document.renderView());
if (!preload->media().isEmpty() && !mediaAttributeMatches(m_document, &m_document.renderView()->style(), preload->media()))
return;
m_document.cachedResourceLoader().preload(preload->resourceType(), preload->resourceRequest(m_document));
}
}