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);
}
