bool LinkLoader::loadLink(const LinkRelAttribute& relAttribute, const AtomicString& crossOriginMode, const String& type, const String& as, const KURL& href, Document& document)
{
// TODO(yoav): Convert all uses of the CrossOriginAttribute to CrossOriginAttributeValue. crbug.com/486689
// FIXME(crbug.com/463266): We're ignoring type here. Maybe we shouldn't.
dnsPrefetchIfNeeded(relAttribute, href, document);
preconnectIfNeeded(relAttribute, href, document, crossOriginAttributeValue(crossOriginMode));
preloadIfNeeded(relAttribute, href, document, as);
// FIXME(crbug.com/323096): Should take care of import.
if ((relAttribute.isLinkPrefetch() || relAttribute.isLinkSubresource() || relAttribute.isTransitionExitingStylesheet()) && 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;
}
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 unsigned prerenderRelTypesFromRelAttribute(const LinkRelAttribute& relAttribute)
{
unsigned result = 0;
if (relAttribute.isLinkPrerender())
result |= PrerenderRelTypePrerender;
if (relAttribute.isLinkNext())
result |= PrerenderRelTypeNext;
return result;
}
static unsigned prerenderRelTypesFromRelAttribute(const LinkRelAttribute& relAttribute, Document& document)
{
unsigned result = 0;
if (relAttribute.isLinkPrerender()) {
result |= PrerenderRelTypePrerender;
UseCounter::count(document, UseCounter::LinkRelPrerender);
}
if (relAttribute.isLinkNext()) {
result |= PrerenderRelTypeNext;
UseCounter::count(document, UseCounter::LinkRelNext);
}
return result;
}
static void preconnectIfNeeded(
const LinkRelAttribute& relAttribute,
const KURL& href,
Document& document,
const CrossOriginAttributeValue crossOrigin,
const NetworkHintsInterface& networkHintsInterface,
LinkCaller caller) {
if (relAttribute.isPreconnect() && href.isValid() &&
href.protocolIsInHTTPFamily()) {
UseCounter::count(document, UseCounter::LinkRelPreconnect);
if (caller == LinkCalledFromHeader)
UseCounter::count(document, UseCounter::LinkHeaderPreconnect);
Settings* settings = document.settings();
if (settings && settings->logDnsPrefetchAndPreconnect()) {
document.addConsoleMessage(ConsoleMessage::create(
OtherMessageSource, DebugMessageLevel,
String("Preconnect triggered for ") + href.getString()));
if (crossOrigin != CrossOriginAttributeNotSet) {
document.addConsoleMessage(ConsoleMessage::create(
OtherMessageSource, DebugMessageLevel,
String("Preconnect CORS setting is ") +
String((crossOrigin == CrossOriginAttributeAnonymous)
? "anonymous"
: "use-credentials")));
}
}
networkHintsInterface.preconnectHost(href, crossOrigin);
}
}
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());
}
}
}
static void preconnectIfNeeded(const LinkRelAttribute& relAttribute, const KURL& href, Document& document)
{
if (relAttribute.isPreconnect() && href.isValid()) {
ASSERT(RuntimeEnabledFeatures::linkPreconnectEnabled());
if (document.settings()->logDnsPrefetchAndPreconnect())
document.addConsoleMessage(ConsoleMessage::create(OtherMessageSource, DebugMessageLevel, String("Preconnect triggered for " + href.host())));
preconnect(href);
}
}
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());
}
}
}
static void preconnectIfNeeded(const LinkRelAttribute& relAttribute, const KURL& href, Document& document, const CrossOriginAttributeValue crossOrigin)
{
if (relAttribute.isPreconnect() && href.isValid()) {
ASSERT(RuntimeEnabledFeatures::linkPreconnectEnabled());
Settings* settings = document.settings();
if (settings && settings->logDnsPrefetchAndPreconnect()) {
document.addConsoleMessage(ConsoleMessage::create(OtherMessageSource, DebugMessageLevel, String("Preconnect triggered for " + href.host())));
if (crossOrigin != CrossOriginAttributeNotSet) {
document.addConsoleMessage(ConsoleMessage::create(OtherMessageSource, DebugMessageLevel,
String("Preconnect CORS setting is ") + String((crossOrigin == CrossOriginAttributeAnonymous) ? "anonymous" : "use-credentials")));
}
}
preconnect(href, crossOrigin);
}
}
bool LinkLoader::loadLink(const LinkRelAttribute& relAttribute, CrossOriginAttributeValue crossOrigin, const String& type,
const String& as, const String& media, const KURL& href, Document& document, const NetworkHintsInterface& networkHintsInterface)
{
// TODO(yoav): Do all links need to load only after they're in document???
// TODO(yoav): Convert all uses of the CrossOriginAttribute to CrossOriginAttributeValue. crbug.com/486689
// FIXME(crbug.com/463266): We're ignoring type here, for everything but preload. Maybe we shouldn't.
dnsPrefetchIfNeeded(relAttribute, href, document, networkHintsInterface, LinkCalledFromMarkup);
preconnectIfNeeded(relAttribute, href, document, crossOrigin, networkHintsInterface, LinkCalledFromMarkup);
bool errorOccurred = false;
if (m_client->shouldLoadLink())
createLinkPreloadResourceClient(preloadIfNeeded(relAttribute, href, document, as, type, media, crossOrigin, LinkCalledFromMarkup, errorOccurred, nullptr));
if (errorOccurred)
m_linkLoadingErrorTimer.startOneShot(0, BLINK_FROM_HERE);
if (href.isEmpty() || !href.isValid())
released();
// FIXME(crbug.com/323096): Should take care of import.
if (relAttribute.isLinkPrefetch() && href.isValid() && document.frame()) {
if (!m_client->shouldLoadLink())
return false;
UseCounter::count(document, UseCounter::LinkRelPrefetch);
FetchRequest linkRequest(ResourceRequest(document.completeURL(href)), FetchInitiatorTypeNames::link);
if (crossOrigin != CrossOriginAttributeNotSet)
linkRequest.setCrossOriginAccessControl(document.getSecurityOrigin(), crossOrigin);
setResource(LinkFetchResource::fetch(Resource::LinkPrefetch, linkRequest, document.fetcher()));
}
if (const unsigned prerenderRelTypes = prerenderRelTypesFromRelAttribute(relAttribute, document)) {
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;
}
void LinkLoader::preloadIfNeeded(const LinkRelAttribute& relAttribute, const KURL& href, Document& document, const String& as)
{
if (relAttribute.isLinkPreload()) {
ASSERT(RuntimeEnabledFeatures::linkPreloadEnabled());
if (!href.isValid() || href.isEmpty()) {
document.addConsoleMessage(ConsoleMessage::create(OtherMessageSource, WarningMessageLevel, String("<link rel=preload> has an invalid `href` value")));
return;
}
Resource::Type type;
if (!getTypeFromAsAttribute(as, type)) {
document.addConsoleMessage(ConsoleMessage::create(OtherMessageSource, WarningMessageLevel, String("<link rel=preload> must have a valid `as` value")));
return;
}
FetchRequest linkRequest(ResourceRequest(document.completeURL(href)), FetchInitiatorTypeNames::link);
Settings* settings = document.settings();
if (settings && settings->logPreload())
document.addConsoleMessage(ConsoleMessage::create(OtherMessageSource, DebugMessageLevel, String("Preload triggered for " + href.host() + href.path())));
setResource(document.fetcher()->fetchLinkPreloadResource(type, linkRequest));
}
}
void LinkLoader::prefetchIfNeeded(Document& document,
const KURL& href,
const LinkRelAttribute& relAttribute,
CrossOriginAttributeValue crossOrigin,
ReferrerPolicy referrerPolicy) {
if (relAttribute.isLinkPrefetch() && href.isValid() && document.frame()) {
UseCounter::count(document, UseCounter::LinkRelPrefetch);
FetchRequest linkRequest(ResourceRequest(document.completeURL(href)),
FetchInitiatorTypeNames::link);
if (referrerPolicy != ReferrerPolicyDefault) {
linkRequest.mutableResourceRequest().setHTTPReferrer(
SecurityPolicy::generateReferrer(referrerPolicy, href,
document.outgoingReferrer()));
}
if (crossOrigin != CrossOriginAttributeNotSet) {
linkRequest.setCrossOriginAccessControl(document.getSecurityOrigin(),
crossOrigin);
}
setResource(LinkFetchResource::fetch(Resource::LinkPrefetch, linkRequest,
document.fetcher()));
}
}