static void dnsPrefetchIfNeeded(
const LinkRelAttribute& relAttribute,
const KURL& href,
Document& document,
const NetworkHintsInterface& networkHintsInterface,
LinkCaller caller) {
if (relAttribute.isDNSPrefetch()) {
UseCounter::count(document, UseCounter::LinkRelDnsPrefetch);
if (caller == LinkCalledFromHeader)
UseCounter::count(document, UseCounter::LinkHeaderDnsPrefetch);
Settings* settings = document.settings();
// FIXME: The href attribute of the link element can be in "//hostname"
// form, and we shouldn't attempt to complete that as URL
// <https://bugs.webkit.org/show_bug.cgi?id=48857>.
if (settings && settings->dnsPrefetchingEnabled() && href.isValid() &&
!href.isEmpty()) {
if (settings->logDnsPrefetchAndPreconnect()) {
document.addConsoleMessage(ConsoleMessage::create(
OtherMessageSource, DebugMessageLevel,
String("DNS prefetch triggered for " + href.host())));
}
networkHintsInterface.dnsPrefetchHost(href.host());
}
}
}
bool LinkLoader::loadLink(const LinkRelAttribute& relAttribute, const AtomicString& crossOriginMode, const String& type, const KURL& href, Document& document)
{
if (relAttribute.isDNSPrefetch()) {
Settings* settings = document.settings();
// FIXME: The href attribute of the link element can be in "//hostname" form, and we shouldn't attempt
// to complete that as URL <https://bugs.webkit.org/show_bug.cgi?id=48857>.
if (settings && settings->dnsPrefetchingEnabled() && href.isValid() && !href.isEmpty())
prefetchDNS(href.host());
}
// FIXME(crbug.com/323096): Should take care of import.
if ((relAttribute.isLinkPrefetch() || relAttribute.isLinkSubresource()) && href.isValid() && document.frame()) {
if (!m_client->shouldLoadLink())
return false;
Resource::Type type = relAttribute.isLinkSubresource() ? Resource::LinkSubresource : Resource::LinkPrefetch;
FetchRequest linkRequest(ResourceRequest(document.completeURL(href)), FetchInitiatorTypeNames::link);
if (!crossOriginMode.isNull())
linkRequest.setCrossOriginAccessControl(document.securityOrigin(), crossOriginMode);
setResource(document.fetcher()->fetchLinkResource(type, linkRequest));
}
if (const unsigned prerenderRelTypes = prerenderRelTypesFromRelAttribute(relAttribute)) {
if (!m_prerender) {
m_prerender = PrerenderHandle::create(document, this, href, prerenderRelTypes);
} else if (m_prerender->url() != href) {
m_prerender->cancel();
m_prerender = PrerenderHandle::create(document, this, href, prerenderRelTypes);
}
// TODO(gavinp): Handle changes to rel types of existing prerenders.
} else if (m_prerender) {
m_prerender->cancel();
m_prerender.clear();
}
return true;
}
static void dnsPrefetchIfNeeded(const LinkRelAttribute& relAttribute, const KURL& href, Document& document)
{
if (relAttribute.isDNSPrefetch()) {
Settings* settings = document.settings();
// FIXME: The href attribute of the link element can be in "//hostname" form, and we shouldn't attempt
// to complete that as URL <https://bugs.webkit.org/show_bug.cgi?id=48857>.
if (settings && settings->dnsPrefetchingEnabled() && href.isValid() && !href.isEmpty()) {
if (settings->logDnsPrefetchAndPreconnect())
document.addConsoleMessage(ConsoleMessage::create(OtherMessageSource, DebugMessageLevel, String("DNS prefetch triggered for " + href.host())));
prefetchDNS(href.host());
}
}
}