bool ApplicationCacheHost::shouldLoadResourceFromApplicationCache(const ResourceRequest& originalRequest, ApplicationCacheResource*& resource)
{
ApplicationCache* cache = applicationCache();
if (!cache || !cache->isComplete())
return false;
ResourceRequest request(originalRequest);
if (Frame* loaderFrame = m_documentLoader.frame()) {
if (Document* document = loaderFrame->document())
document->contentSecurityPolicy()->upgradeInsecureRequestIfNeeded(request, ContentSecurityPolicy::InsecureRequestType::Load);
}
// If the resource is not to be fetched using the HTTP GET mechanism or equivalent, or if its URL has a different
// <scheme> component than the application cache's manifest, then fetch the resource normally.
if (!ApplicationCache::requestIsHTTPOrHTTPSGet(request) || !equalIgnoringASCIICase(request.url().protocol(), cache->manifestResource()->url().protocol()))
return false;
// If the resource's URL is an master entry, the manifest, an explicit entry, or a fallback entry
// in the application cache, then get the resource from the cache (instead of fetching it).
resource = cache->resourceForURL(request.url());
// Resources that match fallback namespaces or online whitelist entries are fetched from the network,
// unless they are also cached.
if (!resource && (cache->allowsAllNetworkRequests() || cache->urlMatchesFallbackNamespace(request.url()) || cache->isURLInOnlineWhitelist(request.url())))
return false;
// Resources that are not present in the manifest will always fail to load (at least, after the
// cache has been primed the first time), making the testing of offline applications simpler.
return true;
}
unsigned DOMApplicationCache::length() const
{
ApplicationCache* cache = associatedCache();
if (!cache)
return 0;
return cache->numDynamicEntries();
}
bool ApplicationCacheHost::update()
{
ApplicationCache* cache = applicationCache();
if (!cache)
return false;
cache->group()->update(m_documentLoader->frame(), ApplicationCacheUpdateWithoutBrowsingContext);
return true;
}
ApplicationCacheHost::CacheInfo ApplicationCacheHost::applicationCacheInfo()
{
ApplicationCache* cache = applicationCache();
if (!cache || !cache->isComplete())
return CacheInfo(URL(), 0, 0, 0);
// FIXME: Add "Creation Time" and "Update Time" to Application Caches.
return CacheInfo(cache->manifestResource()->url(), 0, 0, cache->estimatedSizeInStorage());
}
void DOMApplicationCache::remove(const KURL& url, ExceptionCode& ec)
{
ApplicationCache* cache = associatedCache();
if (!cache) {
ec = INVALID_STATE_ERR;
return;
}
cache->removeDynamicEntry(url);
}
void DOMApplicationCache::update(ExceptionCode& ec)
{
ApplicationCache* cache = associatedCache();
if (!cache) {
ec = INVALID_STATE_ERR;
return;
}
cache->group()->update(m_frame);
}
void ApplicationCacheHost::abort()
{
ApplicationCacheGroup* cacheGroup = candidateApplicationCacheGroup();
if (cacheGroup)
cacheGroup->abort(m_documentLoader->frame());
else {
ApplicationCache* cache = applicationCache();
if (cache)
cache->group()->abort(m_documentLoader->frame());
}
}
String DOMApplicationCache::item(unsigned item, ExceptionCode& ec)
{
ApplicationCache* cache = associatedCache();
if (!cache) {
ec = INVALID_STATE_ERR;
return String();
}
if (item >= length()) {
ec = INDEX_SIZE_ERR;
return String();
}
return cache->dynamicEntry(item);
}
void ApplicationCacheGroup::selectCacheWithoutManifestURL(Frame* frame)
{
if (!frame->settings()->offlineWebApplicationCacheEnabled())
return;
DocumentLoader* documentLoader = frame->loader()->documentLoader();
ASSERT(!documentLoader->applicationCache());
ApplicationCache* mainResourceCache = documentLoader->mainResourceApplicationCache();
if (mainResourceCache) {
mainResourceCache->group()->associateDocumentLoaderWithCache(documentLoader, mainResourceCache);
mainResourceCache->group()->update(frame);
}
}
void ApplicationCacheHost::fillResourceList(ResourceInfoList* resources)
{
ApplicationCache* cache = applicationCache();
if (!cache || !cache->isComplete())
return;
for (const auto& urlAndResource : *cache) {
RefPtr<ApplicationCacheResource> resource = urlAndResource.value;
unsigned type = resource->type();
bool isMaster = type & ApplicationCacheResource::Master;
bool isManifest = type & ApplicationCacheResource::Manifest;
bool isExplicit = type & ApplicationCacheResource::Explicit;
bool isForeign = type & ApplicationCacheResource::Foreign;
bool isFallback = type & ApplicationCacheResource::Fallback;
resources->append(ResourceInfo(resource->url(), isMaster, isManifest, isFallback, isForeign, isExplicit, resource->estimatedSizeInStorage()));
}
}
void ApplicationCacheHost::fillResourceList(ResourceInfoList* resources)
{
ApplicationCache* cache = applicationCache();
if (!cache || !cache->isComplete())
return;
ApplicationCache::ResourceMap::const_iterator end = cache->end();
for (ApplicationCache::ResourceMap::const_iterator it = cache->begin(); it != end; ++it) {
RefPtr<ApplicationCacheResource> resource = it->value;
unsigned type = resource->type();
bool isMaster = type & ApplicationCacheResource::Master;
bool isManifest = type & ApplicationCacheResource::Manifest;
bool isExplicit = type & ApplicationCacheResource::Explicit;
bool isForeign = type & ApplicationCacheResource::Foreign;
bool isFallback = type & ApplicationCacheResource::Fallback;
resources->append(ResourceInfo(resource->url(), isMaster, isManifest, isFallback, isForeign, isExplicit, resource->estimatedSizeInStorage()));
}
}
void DOMApplicationCache::add(const KURL& url, ExceptionCode& ec)
{
ApplicationCache* cache = associatedCache();
if (!cache) {
ec = INVALID_STATE_ERR;
return;
}
if (!url.isValid()) {
ec = SYNTAX_ERR;
return;
}
if (!cache->addDynamicEntry(url)) {
// This should use the (currently not specified) security exceptions in HTML5 4.3.4
ec = SECURITY_ERR;
}
}
void ApplicationCacheGroup::selectCacheWithoutManifestURL(Frame* frame)
{
if (!frame->settings().offlineWebApplicationCacheEnabled())
return;
if (!frame->document()->securityOrigin()->canAccessApplicationCache(frame->tree().top().document()->securityOrigin()))
return;
DocumentLoader* documentLoader = frame->loader().documentLoader();
ASSERT(!documentLoader->applicationCacheHost()->applicationCache());
ApplicationCache* mainResourceCache = documentLoader->applicationCacheHost()->mainResourceApplicationCache();
if (mainResourceCache) {
mainResourceCache->group()->associateDocumentLoaderWithCache(documentLoader, mainResourceCache);
mainResourceCache->group()->update(frame, ApplicationCacheUpdateWithBrowsingContext);
}
}
bool DOMApplicationCache::swapCache()
{
if (!m_frame)
return false;
ApplicationCache* cache = m_frame->loader()->documentLoader()->applicationCache();
if (!cache)
return false;
// Check if we already have the newest cache
ApplicationCache* newestCache = cache->group()->newestCache();
if (cache == newestCache)
return false;
ASSERT(cache->group() == newestCache->group());
m_frame->loader()->documentLoader()->setApplicationCache(newestCache);
return true;
}
bool DocumentLoader::shouldLoadResourceFromApplicationCache(const ResourceRequest& request, ApplicationCacheResource*& resource)
{
ApplicationCache* cache = topLevelApplicationCache();
if (!cache)
return false;
// If the resource is not a HTTP/HTTPS GET, then abort
if (!ApplicationCache::requestIsHTTPOrHTTPSGet(request))
return false;
if (cache->isURLInOnlineWhitelist(request.url()))
return false;
resource = cache->resourceForURL(request.url());
// Don't load foreign resources.
if (resource && (resource->type() & ApplicationCacheResource::Foreign))
resource = 0;
return true;
}
bool ApplicationCacheStorage::storeCopyOfCache(const String& cacheDirectory, ApplicationCacheHost* cacheHost)
{
ApplicationCache* cache = cacheHost->applicationCache();
if (!cache)
return true;
// Create a new cache.
RefPtr<ApplicationCache> cacheCopy = ApplicationCache::create();
cacheCopy->setOnlineWhitelist(cache->onlineWhitelist());
cacheCopy->setFallbackURLs(cache->fallbackURLs());
// Traverse the cache and add copies of all resources.
ApplicationCache::ResourceMap::const_iterator end = cache->end();
for (ApplicationCache::ResourceMap::const_iterator it = cache->begin(); it != end; ++it) {
ApplicationCacheResource* resource = it->second.get();
RefPtr<ApplicationCacheResource> resourceCopy = ApplicationCacheResource::create(resource->url(), resource->response(), resource->type(), resource->data());
cacheCopy->addResource(resourceCopy.release());
}
// Now create a new cache group.
OwnPtr<ApplicationCacheGroup> groupCopy(new ApplicationCacheGroup(cache->group()->manifestURL(), true));
groupCopy->setNewestCache(cacheCopy);
ApplicationCacheStorage copyStorage;
copyStorage.setCacheDirectory(cacheDirectory);
// Empty the cache in case something was there before.
copyStorage.empty();
return copyStorage.storeNewestCache(groupCopy.get());
}
void ApplicationCacheGroup::selectCacheWithoutManifestURL(Frame* frame)
{
if (!frame->settings().offlineWebApplicationCacheEnabled())
return;
DocumentLoader* documentLoader = frame->loader().documentLoader();
ASSERT(!documentLoader->applicationCacheHost()->applicationCache());
// Don't access anything on disk if private browsing is enabled.
if (frame->page()->usesEphemeralSession() || !frame->document()->securityOrigin()->canAccessApplicationCache(frame->tree().top().document()->securityOrigin())) {
postListenerTask(ApplicationCacheHost::CHECKING_EVENT, documentLoader);
postListenerTask(ApplicationCacheHost::ERROR_EVENT, documentLoader);
return;
}
ApplicationCache* mainResourceCache = documentLoader->applicationCacheHost()->mainResourceApplicationCache();
if (mainResourceCache) {
mainResourceCache->group()->associateDocumentLoaderWithCache(documentLoader, mainResourceCache);
mainResourceCache->group()->update(frame, ApplicationCacheUpdateWithBrowsingContext);
}
}
ApplicationCacheHost::Status ApplicationCacheHost::status() const
{
ApplicationCache* cache = applicationCache();
if (!cache)
return UNCACHED;
switch (cache->group()->updateStatus()) {
case ApplicationCacheGroup::Checking:
return CHECKING;
case ApplicationCacheGroup::Downloading:
return DOWNLOADING;
case ApplicationCacheGroup::Idle: {
if (cache->group()->isObsolete())
return OBSOLETE;
if (cache != cache->group()->newestCache())
return UPDATEREADY;
return IDLE;
}
}
ASSERT_NOT_REACHED();
return UNCACHED;
}
bool DocumentLoader::shouldLoadResourceFromApplicationCache(const ResourceRequest& request, ApplicationCacheResource*& resource)
{
ApplicationCache* cache = applicationCache();
if (!cache)
return false;
// If the resource is not a HTTP/HTTPS GET, then abort
if (!ApplicationCache::requestIsHTTPOrHTTPSGet(request))
return false;
// If the resource's URL is an master entry, the manifest, an explicit entry, a fallback entry, or a dynamic entry
// in the application cache, then get the resource from the cache (instead of fetching it).
resource = cache->resourceForURL(request.url());
// Resources that match fallback namespaces or online whitelist entries are fetched from the network,
// unless they are also cached.
if (!resource && (cache->urlMatchesFallbackNamespace(request.url()) || cache->isURLInOnlineWhitelist(request.url())))
return false;
// Resources that are not present in the manifest will always fail to load (at least, after the
// cache has been primed the first time), making the testing of offline applications simpler.
return true;
}
unsigned short DOMApplicationCache::status() const
{
ApplicationCache* cache = associatedCache();
if (!cache)
return UNCACHED;
switch (cache->group()->status()) {
case ApplicationCacheGroup::Checking:
return CHECKING;
case ApplicationCacheGroup::Downloading:
return DOWNLOADING;
case ApplicationCacheGroup::Idle: {
if (cache != cache->group()->newestCache())
return UPDATEREADY;
return IDLE;
}
default:
ASSERT_NOT_REACHED();
}
return 0;
}
bool ApplicationCacheHost::swapCache()
{
ApplicationCache* cache = applicationCache();
if (!cache)
return false;
// If the group of application caches to which cache belongs has the lifecycle status obsolete, unassociate document from cache.
if (cache->group()->isObsolete()) {
cache->group()->disassociateDocumentLoader(m_documentLoader);
return true;
}
// If there is no newer cache, raise an INVALID_STATE_ERR exception.
ApplicationCache* newestCache = cache->group()->newestCache();
if (cache == newestCache)
return false;
ASSERT(cache->group() == newestCache->group());
setApplicationCache(newestCache);
InspectorInstrumentation::updateApplicationCacheStatus(m_documentLoader->frame());
return true;
}
void ApplicationCacheGroup::selectCache(Frame* frame, const URL& passedManifestURL)
{
ASSERT(frame && frame->page());
if (!frame->settings().offlineWebApplicationCacheEnabled())
return;
DocumentLoader* documentLoader = frame->loader().documentLoader();
ASSERT(!documentLoader->applicationCacheHost()->applicationCache());
if (passedManifestURL.isNull()) {
selectCacheWithoutManifestURL(frame);
return;
}
// Don't access anything on disk if private browsing is enabled.
if (frame->page()->usesEphemeralSession() || !frame->document()->securityOrigin()->canAccessApplicationCache(frame->tree().top().document()->securityOrigin())) {
postListenerTask(ApplicationCacheHost::CHECKING_EVENT, documentLoader);
postListenerTask(ApplicationCacheHost::ERROR_EVENT, documentLoader);
return;
}
URL manifestURL(passedManifestURL);
if (manifestURL.hasFragmentIdentifier())
manifestURL.removeFragmentIdentifier();
ApplicationCache* mainResourceCache = documentLoader->applicationCacheHost()->mainResourceApplicationCache();
if (mainResourceCache) {
if (manifestURL == mainResourceCache->group()->m_manifestURL) {
// The cache may have gotten obsoleted after we've loaded from it, but before we parsed the document and saw cache manifest.
if (mainResourceCache->group()->isObsolete())
return;
mainResourceCache->group()->associateDocumentLoaderWithCache(documentLoader, mainResourceCache);
mainResourceCache->group()->update(frame, ApplicationCacheUpdateWithBrowsingContext);
} else {
// The main resource was loaded from cache, so the cache must have an entry for it. Mark it as foreign.
URL resourceURL(documentLoader->responseURL());
if (resourceURL.hasFragmentIdentifier())
resourceURL.removeFragmentIdentifier();
ApplicationCacheResource* resource = mainResourceCache->resourceForURL(resourceURL);
bool inStorage = resource->storageID();
resource->addType(ApplicationCacheResource::Foreign);
if (inStorage)
frame->page()->applicationCacheStorage().storeUpdatedType(resource, mainResourceCache);
// Restart the current navigation from the top of the navigation algorithm, undoing any changes that were made
// as part of the initial load.
// The navigation will not result in the same resource being loaded, because "foreign" entries are never picked during navigation.
frame->navigationScheduler().scheduleLocationChange(frame->document(), frame->document()->securityOrigin(), documentLoader->url(), frame->loader().referrer());
}
return;
}
// The resource was loaded from the network, check if it is a HTTP/HTTPS GET.
const ResourceRequest& request = frame->loader().activeDocumentLoader()->request();
if (!ApplicationCache::requestIsHTTPOrHTTPSGet(request))
return;
// Check that the resource URL has the same scheme/host/port as the manifest URL.
if (!protocolHostAndPortAreEqual(manifestURL, request.url()))
return;
ApplicationCacheGroup* group = frame->page()->applicationCacheStorage().findOrCreateCacheGroup(manifestURL);
documentLoader->applicationCacheHost()->setCandidateApplicationCacheGroup(group);
group->m_pendingMasterResourceLoaders.add(documentLoader);
group->m_downloadingPendingMasterResourceLoadersCount++;
ASSERT(!group->m_cacheBeingUpdated || group->m_updateStatus != Idle);
group->update(frame, ApplicationCacheUpdateWithBrowsingContext);
}
void ApplicationCacheGroup::selectCache(Frame* frame, const KURL& manifestURL)
{
ASSERT(frame && frame->page());
if (!frame->settings()->offlineWebApplicationCacheEnabled())
return;
DocumentLoader* documentLoader = frame->loader()->documentLoader();
ASSERT(!documentLoader->applicationCache());
if (manifestURL.isNull()) {
selectCacheWithoutManifestURL(frame);
return;
}
ApplicationCache* mainResourceCache = documentLoader->mainResourceApplicationCache();
if (mainResourceCache) {
if (manifestURL == mainResourceCache->group()->m_manifestURL) {
mainResourceCache->group()->associateDocumentLoaderWithCache(documentLoader, mainResourceCache);
mainResourceCache->group()->update(frame);
} else {
// The main resource was loaded from cache, so the cache must have an entry for it. Mark it as foreign.
ApplicationCacheResource* resource = mainResourceCache->resourceForURL(documentLoader->url());
bool inStorage = resource->storageID();
resource->addType(ApplicationCacheResource::Foreign);
if (inStorage)
cacheStorage().storeUpdatedType(resource, mainResourceCache);
// Restart the current navigation from the top of the navigation algorithm, undoing any changes that were made
// as part of the initial load.
// The navigation will not result in the same resource being loaded, because "foreign" entries are never picked during navigation.
frame->loader()->scheduleLocationChange(documentLoader->url(), frame->loader()->referrer(), true);
}
return;
}
// The resource was loaded from the network, check if it is a HTTP/HTTPS GET.
const ResourceRequest& request = frame->loader()->activeDocumentLoader()->request();
if (!ApplicationCache::requestIsHTTPOrHTTPSGet(request)) {
selectCacheWithoutManifestURL(frame);
return;
}
// Check that the resource URL has the same scheme/host/port as the manifest URL.
if (!protocolHostAndPortAreEqual(manifestURL, request.url())) {
selectCacheWithoutManifestURL(frame);
return;
}
ApplicationCacheGroup* group = cacheStorage().findOrCreateCacheGroup(manifestURL);
if (ApplicationCache* cache = group->newestCache()) {
ASSERT(cache->manifestResource());
group->associateDocumentLoaderWithCache(frame->loader()->documentLoader(), cache);
if (!frame->loader()->documentLoader()->isLoadingMainResource())
group->finishedLoadingMainResource(frame->loader()->documentLoader());
group->update(frame);
} else {
bool isUpdating = group->m_cacheBeingUpdated;
if (!isUpdating)
group->m_cacheBeingUpdated = ApplicationCache::create();
documentLoader->setCandidateApplicationCacheGroup(group);
group->m_cacheCandidates.add(documentLoader);
const KURL& url = frame->loader()->documentLoader()->originalURL();
unsigned type = 0;
// If the resource has already been downloaded, remove it so that it will be replaced with the implicit resource
if (isUpdating)
type = group->m_cacheBeingUpdated->removeResource(url);
// Add the main resource URL as an implicit entry.
group->addEntry(url, type | ApplicationCacheResource::Implicit);
if (!frame->loader()->documentLoader()->isLoadingMainResource())
group->finishedLoadingMainResource(frame->loader()->documentLoader());
if (!isUpdating)
group->update(frame);
}
}