Ejemplo n.º 1
0
bool PageCache::canCachePageContainingThisFrame(Frame* frame)
{
    for (Frame* child = frame->tree().firstChild(); child; child = child->tree().nextSibling()) {
        if (!canCachePageContainingThisFrame(child))
            return false;
    }
    
    FrameLoader& frameLoader = frame->loader();
    DocumentLoader* documentLoader = frameLoader.documentLoader();
    Document* document = frame->document();
    
    return documentLoader
#if !PLATFORM(IOS)
        && documentLoader->mainDocumentError().isNull()
#else
        && (documentLoader->mainDocumentError().isNull() || (documentLoader->mainDocumentError().isCancellation() && documentLoader->subresourceLoadersArePageCacheAcceptable()))
#endif
        // Do not cache error pages (these can be recognized as pages with substitute data or unreachable URLs).
        && !(documentLoader->substituteData().isValid() && !documentLoader->substituteData().failingURL().isEmpty())
        && (!frameLoader.subframeLoader().containsPlugins() || frame->page()->settings().pageCacheSupportsPlugins())
        && (!document->url().protocolIs("https") || (!documentLoader->response().cacheControlContainsNoCache() && !documentLoader->response().cacheControlContainsNoStore()))
#if ENABLE(SQL_DATABASE)
        && !DatabaseManager::manager().hasOpenDatabases(document)
#endif
#if ENABLE(SHARED_WORKERS)
        && !SharedWorkerRepository::hasSharedWorkers(document)
#endif
        && frameLoader.history().currentItem()
        && !frameLoader.quickRedirectComing()
        && !documentLoader->isLoadingInAPISense()
        && !documentLoader->isStopping()
        && document->canSuspendActiveDOMObjects()
        // FIXME: We should investigating caching frames that have an associated
        // application cache. <rdar://problem/5917899> tracks that work.
        && documentLoader->applicationCacheHost()->canCacheInPageCache()
        && frameLoader.client().canCachePage();
}
Ejemplo n.º 2
0
static bool canCacheFrame(Frame& frame, DiagnosticLoggingClient& diagnosticLoggingClient, unsigned indentLevel)
{
    PCLOG("+---");
    FrameLoader& frameLoader = frame.loader();

    // Prevent page caching if a subframe is still in provisional load stage.
    // We only do this check for subframes because the main frame is reused when navigating to a new page.
    if (!frame.isMainFrame() && frameLoader.state() == FrameStateProvisional) {
        PCLOG("   -Frame is in provisional load stage");
        logPageCacheFailureDiagnosticMessage(diagnosticLoggingClient, DiagnosticLoggingKeys::provisionalLoadKey());
        return false;
    }

    DocumentLoader* documentLoader = frameLoader.documentLoader();
    if (!documentLoader) {
        PCLOG("   -There is no DocumentLoader object");
        logPageCacheFailureDiagnosticMessage(diagnosticLoggingClient, DiagnosticLoggingKeys::noDocumentLoaderKey());
        return false;
    }

    URL currentURL = documentLoader->url();
    URL newURL = frameLoader.provisionalDocumentLoader() ? frameLoader.provisionalDocumentLoader()->url() : URL();
    if (!newURL.isEmpty())
        PCLOG(" Determining if frame can be cached navigating from (", currentURL.string(), ") to (", newURL.string(), "):");
    else
        PCLOG(" Determining if subframe with URL (", currentURL.string(), ") can be cached:");
     
    bool isCacheable = true;
    if (!documentLoader->mainDocumentError().isNull()) {
        PCLOG("   -Main document has an error");
        logPageCacheFailureDiagnosticMessage(diagnosticLoggingClient, DiagnosticLoggingKeys::mainDocumentErrorKey());

        if (documentLoader->mainDocumentError().isCancellation() && documentLoader->subresourceLoadersArePageCacheAcceptable())
            PCLOG("    -But, it was a cancellation and all loaders during the cancelation were loading images or XHR.");
        else
            isCacheable = false;
    }
    // Do not cache error pages (these can be recognized as pages with substitute data or unreachable URLs).
    if (documentLoader->substituteData().isValid() && !documentLoader->substituteData().failingURL().isEmpty()) {
        PCLOG("   -Frame is an error page");
        logPageCacheFailureDiagnosticMessage(diagnosticLoggingClient, DiagnosticLoggingKeys::isErrorPageKey());
        isCacheable = false;
    }
    if (frameLoader.subframeLoader().containsPlugins() && !frame.page()->settings().pageCacheSupportsPlugins()) {
        PCLOG("   -Frame contains plugins");
        logPageCacheFailureDiagnosticMessage(diagnosticLoggingClient, DiagnosticLoggingKeys::hasPluginsKey());
        isCacheable = false;
    }
    if (frame.isMainFrame() && frame.document() && frame.document()->url().protocolIs("https") && documentLoader->response().cacheControlContainsNoStore()) {
        PCLOG("   -Frame is HTTPS, and cache control prohibits storing");
        logPageCacheFailureDiagnosticMessage(diagnosticLoggingClient, DiagnosticLoggingKeys::httpsNoStoreKey());
        isCacheable = false;
    }
    if (frame.isMainFrame() && !frameLoader.history().currentItem()) {
        PCLOG("   -Main frame has no current history item");
        logPageCacheFailureDiagnosticMessage(diagnosticLoggingClient, DiagnosticLoggingKeys::noCurrentHistoryItemKey());
        isCacheable = false;
    }
    if (frameLoader.quickRedirectComing()) {
        PCLOG("   -Quick redirect is coming");
        logPageCacheFailureDiagnosticMessage(diagnosticLoggingClient, DiagnosticLoggingKeys::quirkRedirectComingKey());
        isCacheable = false;
    }
    if (documentLoader->isLoading()) {
        PCLOG("   -DocumentLoader is still loading");
        logPageCacheFailureDiagnosticMessage(diagnosticLoggingClient, DiagnosticLoggingKeys::isLoadingKey());
        isCacheable = false;
    }
    if (documentLoader->isStopping()) {
        PCLOG("   -DocumentLoader is in the middle of stopping");
        logPageCacheFailureDiagnosticMessage(diagnosticLoggingClient, DiagnosticLoggingKeys::documentLoaderStoppingKey());
        isCacheable = false;
    }

    Vector<ActiveDOMObject*> unsuspendableObjects;
    if (frame.document() && !frame.document()->canSuspendActiveDOMObjectsForDocumentSuspension(&unsuspendableObjects)) {
        PCLOG("   -The document cannot suspend its active DOM Objects");
        for (auto* activeDOMObject : unsuspendableObjects) {
            PCLOG("    - Unsuspendable: ", activeDOMObject->activeDOMObjectName());
            diagnosticLoggingClient.logDiagnosticMessageWithValue(DiagnosticLoggingKeys::pageCacheKey(), DiagnosticLoggingKeys::unsuspendableDOMObjectKey(), activeDOMObject->activeDOMObjectName(), ShouldSample::Yes);
            UNUSED_PARAM(activeDOMObject);
        }
        logPageCacheFailureDiagnosticMessage(diagnosticLoggingClient, DiagnosticLoggingKeys::cannotSuspendActiveDOMObjectsKey());
        isCacheable = false;
    }
    // FIXME: We should investigating caching frames that have an associated
    // application cache. <rdar://problem/5917899> tracks that work.
    if (!documentLoader->applicationCacheHost()->canCacheInPageCache()) {
        PCLOG("   -The DocumentLoader uses an application cache");
        logPageCacheFailureDiagnosticMessage(diagnosticLoggingClient, DiagnosticLoggingKeys::applicationCacheKey());
        isCacheable = false;
    }
    if (!frameLoader.client().canCachePage()) {
        PCLOG("   -The client says this frame cannot be cached");
        logPageCacheFailureDiagnosticMessage(diagnosticLoggingClient, DiagnosticLoggingKeys::deniedByClientKey());
        isCacheable = false;
    }

    for (Frame* child = frame.tree().firstChild(); child; child = child->tree().nextSibling()) {
        if (!canCacheFrame(*child, diagnosticLoggingClient, indentLevel + 1))
            isCacheable = false;
    }
    
    PCLOG(isCacheable ? " Frame CAN be cached" : " Frame CANNOT be cached");
    PCLOG("+---");
    
    return isCacheable;
}
Ejemplo n.º 3
0
bool PageCache::canCachePageContainingThisFrame(Frame& frame)
{
    for (Frame* child = frame.tree().firstChild(); child; child = child->tree().nextSibling()) {
        if (!canCachePageContainingThisFrame(*child))
            return false;
    }
    
    FrameLoader& frameLoader = frame.loader();
    DocumentLoader* documentLoader = frameLoader.documentLoader();
    Document* document = frame.document();
    
    return documentLoader
        && (documentLoader->mainDocumentError().isNull() || (documentLoader->mainDocumentError().isCancellation() && documentLoader->subresourceLoadersArePageCacheAcceptable()))
        // Do not cache error pages (these can be recognized as pages with substitute data or unreachable URLs).
        && !(documentLoader->substituteData().isValid() && !documentLoader->substituteData().failingURL().isEmpty())
        && (!frameLoader.subframeLoader().containsPlugins() || frame.page()->settings().pageCacheSupportsPlugins())
        && !(frame.isMainFrame() && document->url().protocolIs("https") && documentLoader->response().cacheControlContainsNoStore())
        && frameLoader.history().currentItem()
        && !frameLoader.quickRedirectComing()
        && !documentLoader->isLoading()
        && !documentLoader->isStopping()
        && document->canSuspendActiveDOMObjectsForPageCache()
        // FIXME: We should investigating caching frames that have an associated
        // application cache. <rdar://problem/5917899> tracks that work.
        && documentLoader->applicationCacheHost()->canCacheInPageCache()
        && frameLoader.client().canCachePage();
}