| /* |
| Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de) |
| Copyright (C) 2001 Dirk Mueller (mueller@kde.org) |
| Copyright (C) 2002 Waldo Bastian (bastian@kde.org) |
| Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com) |
| Copyright (C) 2004-2011, 2014, 2018 Apple Inc. All rights reserved. |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Library General Public |
| License as published by the Free Software Foundation; either |
| version 2 of the License, or (at your option) any later version. |
| |
| This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public License |
| along with this library; see the file COPYING.LIB. If not, write to |
| the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "config.h" |
| #include "CachedResource.h" |
| |
| #include "CachedResourceClient.h" |
| #include "CachedResourceClientWalker.h" |
| #include "CachedResourceHandle.h" |
| #include "CachedResourceLoader.h" |
| #include "CookieJar.h" |
| #include "CrossOriginAccessControl.h" |
| #include "DiagnosticLoggingClient.h" |
| #include "DiagnosticLoggingKeys.h" |
| #include "Document.h" |
| #include "DocumentLoader.h" |
| #include "Frame.h" |
| #include "FrameLoader.h" |
| #include "FrameLoaderClient.h" |
| #include "HTTPHeaderNames.h" |
| #include "InspectorInstrumentation.h" |
| #include "LegacySchemeRegistry.h" |
| #include "LoaderStrategy.h" |
| #include "Logging.h" |
| #include "MemoryCache.h" |
| #include "PlatformStrategies.h" |
| #include "ProgressTracker.h" |
| #include "ResourceHandle.h" |
| #include "SecurityOrigin.h" |
| #include "SubresourceLoader.h" |
| #include <wtf/CompletionHandler.h> |
| #include <wtf/MathExtras.h> |
| #include <wtf/RefCountedLeakCounter.h> |
| #include <wtf/StdLibExtras.h> |
| #include <wtf/URL.h> |
| #include <wtf/Vector.h> |
| #include <wtf/text/CString.h> |
| |
| #if USE(QUICK_LOOK) |
| #include "QuickLook.h" |
| #endif |
| |
| #define RELEASE_LOG_IF_ALLOWED(fmt, ...) RELEASE_LOG_IF(cachedResourceLoader.isAlwaysOnLoggingAllowed(), Network, "%p - CachedResource::" fmt, this, ##__VA_ARGS__) |
| |
| namespace WebCore { |
| |
| ResourceLoadPriority CachedResource::defaultPriorityForResourceType(Type type) |
| { |
| switch (type) { |
| case Type::MainResource: |
| return ResourceLoadPriority::VeryHigh; |
| case Type::CSSStyleSheet: |
| case Type::Script: |
| return ResourceLoadPriority::High; |
| #if ENABLE(SVG_FONTS) |
| case Type::SVGFontResource: |
| #endif |
| case Type::MediaResource: |
| case Type::FontResource: |
| case Type::RawResource: |
| case Type::Icon: |
| return ResourceLoadPriority::Medium; |
| case Type::ImageResource: |
| return ResourceLoadPriority::Low; |
| #if ENABLE(XSLT) |
| case Type::XSLStyleSheet: |
| return ResourceLoadPriority::High; |
| #endif |
| case Type::SVGDocumentResource: |
| return ResourceLoadPriority::Low; |
| case Type::Beacon: |
| case Type::Ping: |
| return ResourceLoadPriority::VeryLow; |
| case Type::LinkPrefetch: |
| return ResourceLoadPriority::VeryLow; |
| #if ENABLE(VIDEO_TRACK) |
| case Type::TextTrackResource: |
| return ResourceLoadPriority::Low; |
| #endif |
| #if ENABLE(APPLICATION_MANIFEST) |
| case Type::ApplicationManifest: |
| return ResourceLoadPriority::Low; |
| #endif |
| } |
| ASSERT_NOT_REACHED(); |
| return ResourceLoadPriority::Low; |
| } |
| |
| static Seconds deadDecodedDataDeletionIntervalForResourceType(CachedResource::Type type) |
| { |
| if (type == CachedResource::Type::Script) |
| return 0_s; |
| |
| return MemoryCache::singleton().deadDecodedDataDeletionInterval(); |
| } |
| |
| DEFINE_DEBUG_ONLY_GLOBAL(WTF::RefCountedLeakCounter, cachedResourceLeakCounter, ("CachedResource")); |
| |
| CachedResource::CachedResource(CachedResourceRequest&& request, Type type, const PAL::SessionID& sessionID, const CookieJar* cookieJar) |
| : m_options(request.options()) |
| , m_resourceRequest(request.releaseResourceRequest()) |
| , m_decodedDataDeletionTimer(*this, &CachedResource::destroyDecodedData, deadDecodedDataDeletionIntervalForResourceType(type)) |
| , m_sessionID(sessionID) |
| , m_cookieJar(cookieJar) |
| , m_responseTimestamp(WallTime::now()) |
| , m_fragmentIdentifierForRequest(request.releaseFragmentIdentifier()) |
| , m_origin(request.releaseOrigin()) |
| , m_initiatorName(request.initiatorName()) |
| , m_loadPriority(defaultPriorityForResourceType(type)) |
| , m_type(type) |
| , m_isLinkPreload(request.isLinkPreload()) |
| , m_hasUnknownEncoding(request.isLinkPreload()) |
| , m_ignoreForRequestCount(request.ignoreForRequestCount()) |
| { |
| ASSERT(m_sessionID.isValid()); |
| |
| setLoadPriority(request.priority()); |
| #ifndef NDEBUG |
| cachedResourceLeakCounter.increment(); |
| #endif |
| |
| // FIXME: We should have a better way of checking for Navigation loads, maybe FetchMode::Options::Navigate. |
| ASSERT(m_origin || m_type == Type::MainResource); |
| |
| if (isRequestCrossOrigin(m_origin.get(), m_resourceRequest.url(), m_options)) |
| setCrossOrigin(); |
| } |
| |
| // FIXME: For this constructor, we should probably mandate that the URL has no fragment identifier. |
| CachedResource::CachedResource(const URL& url, Type type, const PAL::SessionID& sessionID, const CookieJar* cookieJar) |
| : m_resourceRequest(url) |
| , m_decodedDataDeletionTimer(*this, &CachedResource::destroyDecodedData, deadDecodedDataDeletionIntervalForResourceType(type)) |
| , m_sessionID(sessionID) |
| , m_cookieJar(cookieJar) |
| , m_responseTimestamp(WallTime::now()) |
| , m_fragmentIdentifierForRequest(CachedResourceRequest::splitFragmentIdentifierFromRequestURL(m_resourceRequest)) |
| , m_status(Cached) |
| , m_type(type) |
| { |
| ASSERT(m_sessionID.isValid()); |
| #ifndef NDEBUG |
| cachedResourceLeakCounter.increment(); |
| #endif |
| } |
| |
| CachedResource::~CachedResource() |
| { |
| ASSERT(!m_resourceToRevalidate); // Should be true because canDelete() checks this. |
| ASSERT(canDelete()); |
| ASSERT(!inCache()); |
| ASSERT(!m_deleted); |
| ASSERT(url().isNull() || !allowsCaching() || MemoryCache::singleton().resourceForRequest(resourceRequest(), sessionID()) != this); |
| |
| #ifndef NDEBUG |
| m_deleted = true; |
| cachedResourceLeakCounter.decrement(); |
| #endif |
| } |
| |
| void CachedResource::failBeforeStarting() |
| { |
| // FIXME: What if resources in other frames were waiting for this revalidation? |
| LOG(ResourceLoading, "Cannot start loading '%s'", url().string().latin1().data()); |
| if (allowsCaching() && m_resourceToRevalidate) |
| MemoryCache::singleton().revalidationFailed(*this); |
| error(CachedResource::LoadError); |
| } |
| |
| void CachedResource::load(CachedResourceLoader& cachedResourceLoader) |
| { |
| if (!cachedResourceLoader.frame()) { |
| RELEASE_LOG_IF_ALLOWED("load: No associated frame"); |
| failBeforeStarting(); |
| return; |
| } |
| Frame& frame = *cachedResourceLoader.frame(); |
| |
| // Prevent new loads if we are in the BackForwardCache or being added to the BackForwardCache. |
| // We query the top document because new frames may be created in pagehide event handlers |
| // and their backForwardCacheState will not reflect the fact that they are about to enter page |
| // cache. |
| if (auto* topDocument = frame.mainFrame().document()) { |
| switch (topDocument->backForwardCacheState()) { |
| case Document::NotInBackForwardCache: |
| break; |
| case Document::AboutToEnterBackForwardCache: |
| // Beacons are allowed to go through in 'pagehide' event handlers. |
| if (shouldUsePingLoad(type())) |
| break; |
| RELEASE_LOG_IF_ALLOWED("load: About to enter back/forward cache (frame = %p)", &frame); |
| failBeforeStarting(); |
| return; |
| case Document::InBackForwardCache: |
| RELEASE_LOG_IF_ALLOWED("load: Already in back/forward cache (frame = %p)", &frame); |
| failBeforeStarting(); |
| return; |
| } |
| } |
| |
| FrameLoader& frameLoader = frame.loader(); |
| if (m_options.securityCheck == SecurityCheckPolicy::DoSecurityCheck && !shouldUsePingLoad(type())) { |
| while (true) { |
| if (frameLoader.state() == FrameStateProvisional) |
| RELEASE_LOG_IF_ALLOWED("load: Failed security check -- state is provisional (frame = %p)", &frame); |
| else if (!frameLoader.activeDocumentLoader()) |
| RELEASE_LOG_IF_ALLOWED("load: Failed security check -- not active document (frame = %p)", &frame); |
| else if (frameLoader.activeDocumentLoader()->isStopping()) |
| RELEASE_LOG_IF_ALLOWED("load: Failed security check -- active loader is stopping (frame = %p)", &frame); |
| else |
| break; |
| failBeforeStarting(); |
| return; |
| } |
| } |
| |
| m_loading = true; |
| |
| if (isCacheValidator()) { |
| CachedResource* resourceToRevalidate = m_resourceToRevalidate; |
| ASSERT(resourceToRevalidate->canUseCacheValidator()); |
| ASSERT(resourceToRevalidate->isLoaded()); |
| const String& lastModified = resourceToRevalidate->response().httpHeaderField(HTTPHeaderName::LastModified); |
| const String& eTag = resourceToRevalidate->response().httpHeaderField(HTTPHeaderName::ETag); |
| if (!lastModified.isEmpty() || !eTag.isEmpty()) { |
| ASSERT(cachedResourceLoader.cachePolicy(type(), url()) != CachePolicyReload); |
| if (cachedResourceLoader.cachePolicy(type(), url()) == CachePolicyRevalidate) |
| m_resourceRequest.setHTTPHeaderField(HTTPHeaderName::CacheControl, "max-age=0"); |
| if (!lastModified.isEmpty()) |
| m_resourceRequest.setHTTPHeaderField(HTTPHeaderName::IfModifiedSince, lastModified); |
| if (!eTag.isEmpty()) |
| m_resourceRequest.setHTTPHeaderField(HTTPHeaderName::IfNoneMatch, eTag); |
| } |
| } |
| |
| if (type() == Type::LinkPrefetch) |
| m_resourceRequest.setHTTPHeaderField(HTTPHeaderName::Purpose, "prefetch"); |
| m_resourceRequest.setPriority(loadPriority()); |
| |
| // Navigation algorithm is setting up the request before sending it to CachedResourceLoader?CachedResource. |
| // So no need for extra fields for MainResource. |
| if (type() != Type::MainResource) |
| frameLoader.addExtraFieldsToSubresourceRequest(m_resourceRequest); |
| |
| |
| // FIXME: It's unfortunate that the cache layer and below get to know anything about fragment identifiers. |
| // We should look into removing the expectation of that knowledge from the platform network stacks. |
| ResourceRequest request(m_resourceRequest); |
| if (!m_fragmentIdentifierForRequest.isNull()) { |
| URL url = request.url(); |
| url.setFragmentIdentifier(m_fragmentIdentifierForRequest); |
| request.setURL(url); |
| m_fragmentIdentifierForRequest = String(); |
| } |
| |
| if (m_options.keepAlive && type() != Type::Ping && !cachedResourceLoader.keepaliveRequestTracker().tryRegisterRequest(*this)) { |
| setResourceError({ errorDomainWebKitInternal, 0, request.url(), "Reached maximum amount of queued data of 64Kb for keepalive requests"_s, ResourceError::Type::AccessControl }); |
| failBeforeStarting(); |
| return; |
| } |
| |
| // FIXME: Deprecate that code path. |
| if (m_options.keepAlive && shouldUsePingLoad(type()) && platformStrategies()->loaderStrategy()->usePingLoad()) { |
| ASSERT(m_originalRequest); |
| CachedResourceHandle<CachedResource> protectedThis(this); |
| |
| unsigned long identifier = frame.page()->progress().createUniqueIdentifier(); |
| InspectorInstrumentation::willSendRequestOfType(&frame, identifier, frameLoader.activeDocumentLoader(), request, InspectorInstrumentation::LoadType::Beacon); |
| |
| platformStrategies()->loaderStrategy()->startPingLoad(frame, request, m_originalRequest->httpHeaderFields(), m_options, m_options.contentSecurityPolicyImposition, [this, protectedThis = WTFMove(protectedThis), protectedFrame = makeRef(frame), identifier] (const ResourceError& error, const ResourceResponse& response) { |
| if (!response.isNull()) |
| InspectorInstrumentation::didReceiveResourceResponse(protectedFrame, identifier, protectedFrame->loader().activeDocumentLoader(), response, nullptr); |
| if (!error.isNull()) { |
| setResourceError(error); |
| this->error(LoadError); |
| InspectorInstrumentation::didFailLoading(protectedFrame.ptr(), protectedFrame->loader().activeDocumentLoader(), identifier, error); |
| return; |
| } |
| finishLoading(nullptr); |
| NetworkLoadMetrics emptyMetrics; |
| InspectorInstrumentation::didFinishLoading(protectedFrame.ptr(), protectedFrame->loader().activeDocumentLoader(), identifier, emptyMetrics, nullptr); |
| }); |
| return; |
| } |
| |
| platformStrategies()->loaderStrategy()->loadResource(frame, *this, WTFMove(request), m_options, [this, protectedThis = CachedResourceHandle<CachedResource>(this), frame = makeRef(frame), loggingAllowed = cachedResourceLoader.isAlwaysOnLoggingAllowed()] (RefPtr<SubresourceLoader>&& loader) { |
| m_loader = WTFMove(loader); |
| if (!m_loader) { |
| RELEASE_LOG_IF(loggingAllowed, Network, "%p - CachedResource::load: Unable to create SubresourceLoader (frame = %p)", this, frame.ptr()); |
| failBeforeStarting(); |
| return; |
| } |
| m_status = Pending; |
| }); |
| } |
| |
| void CachedResource::loadFrom(const CachedResource& resource) |
| { |
| ASSERT(url() == resource.url()); |
| ASSERT(type() == resource.type()); |
| ASSERT(resource.status() == Status::Cached); |
| |
| if (isCrossOrigin() && m_options.mode == FetchOptions::Mode::Cors) { |
| ASSERT(m_origin); |
| String errorMessage; |
| if (!WebCore::passesAccessControlCheck(resource.response(), m_options.storedCredentialsPolicy, *m_origin, errorMessage)) { |
| setResourceError(ResourceError(String(), 0, url(), errorMessage, ResourceError::Type::AccessControl)); |
| return; |
| } |
| } |
| |
| setBodyDataFrom(resource); |
| setStatus(Status::Cached); |
| setLoading(false); |
| } |
| |
| void CachedResource::setBodyDataFrom(const CachedResource& resource) |
| { |
| m_data = resource.m_data; |
| m_response = resource.m_response; |
| m_response.setTainting(m_responseTainting); |
| setDecodedSize(resource.decodedSize()); |
| setEncodedSize(resource.encodedSize()); |
| } |
| |
| void CachedResource::checkNotify() |
| { |
| if (isLoading() || stillNeedsLoad()) |
| return; |
| |
| CachedResourceClientWalker<CachedResourceClient> walker(m_clients); |
| while (CachedResourceClient* client = walker.next()) |
| client->notifyFinished(*this); |
| } |
| |
| void CachedResource::updateBuffer(SharedBuffer&) |
| { |
| ASSERT(dataBufferingPolicy() == DataBufferingPolicy::BufferData); |
| } |
| |
| void CachedResource::updateData(const char*, unsigned) |
| { |
| ASSERT(dataBufferingPolicy() == DataBufferingPolicy::DoNotBufferData); |
| } |
| |
| void CachedResource::finishLoading(SharedBuffer*) |
| { |
| setLoading(false); |
| checkNotify(); |
| } |
| |
| void CachedResource::error(CachedResource::Status status) |
| { |
| setStatus(status); |
| ASSERT(errorOccurred()); |
| m_data = nullptr; |
| |
| setLoading(false); |
| checkNotify(); |
| } |
| |
| void CachedResource::cancelLoad() |
| { |
| if (!isLoading() && !stillNeedsLoad()) |
| return; |
| |
| auto* documentLoader = (m_loader && m_loader->frame()) ? m_loader->frame()->loader().activeDocumentLoader() : nullptr; |
| if (m_options.keepAlive && (!documentLoader || documentLoader->isStopping())) |
| m_error = { }; |
| else |
| setStatus(LoadError); |
| |
| setLoading(false); |
| checkNotify(); |
| } |
| |
| void CachedResource::finish() |
| { |
| if (!errorOccurred()) |
| m_status = Cached; |
| } |
| |
| void CachedResource::setCrossOrigin() |
| { |
| ASSERT(m_options.mode != FetchOptions::Mode::SameOrigin); |
| m_responseTainting = (m_options.mode == FetchOptions::Mode::Cors) ? ResourceResponse::Tainting::Cors : ResourceResponse::Tainting::Opaque; |
| } |
| |
| bool CachedResource::isCrossOrigin() const |
| { |
| return m_responseTainting != ResourceResponse::Tainting::Basic; |
| } |
| |
| bool CachedResource::isCORSSameOrigin() const |
| { |
| // Following resource types do not use CORS |
| ASSERT(type() != Type::FontResource); |
| #if ENABLE(SVG_FONTS) |
| ASSERT(type() != Type::SVGFontResource); |
| #endif |
| #if ENABLE(XSLT) |
| ASSERT(type() != Type::XSLStyleSheet); |
| #endif |
| |
| // https://html.spec.whatwg.org/multipage/infrastructure.html#cors-same-origin |
| return !loadFailedOrCanceled() && m_responseTainting != ResourceResponse::Tainting::Opaque; |
| } |
| |
| bool CachedResource::isExpired() const |
| { |
| if (m_response.isNull()) |
| return false; |
| |
| return computeCurrentAge(m_response, m_responseTimestamp) > freshnessLifetime(m_response); |
| } |
| |
| static inline bool shouldCacheSchemeIndefinitely(StringView scheme) |
| { |
| #if PLATFORM(COCOA) |
| if (equalLettersIgnoringASCIICase(scheme, "applewebdata")) |
| return true; |
| #endif |
| #if USE(SOUP) |
| if (equalLettersIgnoringASCIICase(scheme, "resource")) |
| return true; |
| #endif |
| return equalLettersIgnoringASCIICase(scheme, "data"); |
| } |
| |
| Seconds CachedResource::freshnessLifetime(const ResourceResponse& response) const |
| { |
| if (!response.url().protocolIsInHTTPFamily()) { |
| StringView protocol = response.url().protocol(); |
| if (!shouldCacheSchemeIndefinitely(protocol)) { |
| // Don't cache non-HTTP main resources since we can't check for freshness. |
| // FIXME: We should not cache subresources either, but when we tried this |
| // it caused performance and flakiness issues in our test infrastructure. |
| if (m_type == Type::MainResource || LegacySchemeRegistry::shouldAlwaysRevalidateURLScheme(protocol.toStringWithoutCopying())) |
| return 0_us; |
| } |
| |
| return Seconds::infinity(); |
| } |
| |
| return computeFreshnessLifetimeForHTTPFamily(response, m_responseTimestamp); |
| } |
| |
| void CachedResource::redirectReceived(ResourceRequest&& request, const ResourceResponse& response, CompletionHandler<void(ResourceRequest&&)>&& completionHandler) |
| { |
| m_requestedFromNetworkingLayer = true; |
| if (response.isNull()) |
| return completionHandler(WTFMove(request)); |
| |
| updateRedirectChainStatus(m_redirectChainCacheStatus, response); |
| completionHandler(WTFMove(request)); |
| } |
| |
| void CachedResource::setResponse(const ResourceResponse& response) |
| { |
| ASSERT(m_response.type() == ResourceResponse::Type::Default); |
| m_response = response; |
| m_varyingHeaderValues = collectVaryingRequestHeaders(cookieJar(), m_resourceRequest, m_response); |
| |
| #if ENABLE(SERVICE_WORKER) |
| if (m_response.source() == ResourceResponse::Source::ServiceWorker) { |
| m_responseTainting = m_response.tainting(); |
| return; |
| } |
| #endif |
| m_response.setRedirected(m_redirectChainCacheStatus.status != RedirectChainCacheStatus::Status::NoRedirection); |
| if (m_response.tainting() == ResourceResponse::Tainting::Basic || m_response.tainting() == ResourceResponse::Tainting::Cors) |
| m_response.setTainting(m_responseTainting); |
| } |
| |
| void CachedResource::responseReceived(const ResourceResponse& response) |
| { |
| setResponse(response); |
| m_responseTimestamp = WallTime::now(); |
| String encoding = response.textEncodingName(); |
| if (!encoding.isNull()) |
| setEncoding(encoding); |
| } |
| |
| void CachedResource::clearLoader() |
| { |
| ASSERT(m_loader); |
| m_identifierForLoadWithoutResourceLoader = m_loader->identifier(); |
| m_loader = nullptr; |
| deleteIfPossible(); |
| } |
| |
| void CachedResource::addClient(CachedResourceClient& client) |
| { |
| if (addClientToSet(client)) |
| didAddClient(client); |
| } |
| |
| void CachedResource::didAddClient(CachedResourceClient& client) |
| { |
| if (m_decodedDataDeletionTimer.isActive()) |
| m_decodedDataDeletionTimer.stop(); |
| |
| if (m_clientsAwaitingCallback.remove(&client)) |
| m_clients.add(&client); |
| |
| // FIXME: Make calls to notifyFinished async |
| if (!isLoading() && !stillNeedsLoad()) |
| client.notifyFinished(*this); |
| } |
| |
| bool CachedResource::addClientToSet(CachedResourceClient& client) |
| { |
| if (m_preloadResult == PreloadResult::PreloadNotReferenced && client.shouldMarkAsReferenced()) { |
| if (isLoaded()) |
| m_preloadResult = PreloadResult::PreloadReferencedWhileComplete; |
| else if (m_requestedFromNetworkingLayer) |
| m_preloadResult = PreloadResult::PreloadReferencedWhileLoading; |
| else |
| m_preloadResult = PreloadResult::PreloadReferenced; |
| } |
| if (allowsCaching() && !hasClients() && inCache()) |
| MemoryCache::singleton().addToLiveResourcesSize(*this); |
| |
| if ((m_type == Type::RawResource || m_type == Type::MainResource) && !m_response.isNull() && !m_proxyResource) { |
| // Certain resources (especially XHRs and main resources) do crazy things if an asynchronous load returns |
| // synchronously (e.g., scripts may not have set all the state they need to handle the load). |
| // Therefore, rather than immediately sending callbacks on a cache hit like other CachedResources, |
| // we schedule the callbacks and ensure we never finish synchronously. |
| ASSERT(!m_clientsAwaitingCallback.contains(&client)); |
| m_clientsAwaitingCallback.add(&client, makeUnique<Callback>(*this, client)); |
| return false; |
| } |
| |
| m_clients.add(&client); |
| return true; |
| } |
| |
| void CachedResource::removeClient(CachedResourceClient& client) |
| { |
| auto callback = m_clientsAwaitingCallback.take(&client); |
| if (callback) { |
| ASSERT(!m_clients.contains(&client)); |
| callback->cancel(); |
| callback = nullptr; |
| } else { |
| ASSERT(m_clients.contains(&client)); |
| m_clients.remove(&client); |
| didRemoveClient(client); |
| } |
| |
| if (deleteIfPossible()) { |
| // `this` object is dead here. |
| return; |
| } |
| |
| if (hasClients()) |
| return; |
| |
| auto& memoryCache = MemoryCache::singleton(); |
| if (allowsCaching() && inCache()) { |
| memoryCache.removeFromLiveResourcesSize(*this); |
| memoryCache.removeFromLiveDecodedResourcesList(*this); |
| } |
| if (!m_switchingClientsToRevalidatedResource) |
| allClientsRemoved(); |
| destroyDecodedDataIfNeeded(); |
| |
| if (!allowsCaching()) |
| return; |
| |
| if (response().cacheControlContainsNoStore() && url().protocolIs("https")) { |
| // RFC2616 14.9.2: |
| // "no-store: ... MUST make a best-effort attempt to remove the information from volatile storage as promptly as possible" |
| // "... History buffers MAY store such responses as part of their normal operation." |
| // We allow non-secure content to be reused in history, but we do not allow secure content to be reused. |
| memoryCache.remove(*this); |
| } |
| memoryCache.pruneSoon(); |
| } |
| |
| void CachedResource::allClientsRemoved() |
| { |
| if (isLinkPreload() && m_loader) |
| m_loader->cancelIfNotFinishing(); |
| } |
| |
| void CachedResource::destroyDecodedDataIfNeeded() |
| { |
| if (!m_decodedSize) |
| return; |
| if (!MemoryCache::singleton().deadDecodedDataDeletionInterval()) |
| return; |
| m_decodedDataDeletionTimer.restart(); |
| } |
| |
| void CachedResource::decodedDataDeletionTimerFired() |
| { |
| destroyDecodedData(); |
| } |
| |
| bool CachedResource::deleteIfPossible() |
| { |
| if (canDelete()) { |
| LOG(ResourceLoading, "CachedResource %p deleteIfPossible - can delete, in cache %d", this, inCache()); |
| if (!inCache()) { |
| InspectorInstrumentation::willDestroyCachedResource(*this); |
| delete this; |
| return true; |
| } |
| if (m_data) |
| m_data->hintMemoryNotNeededSoon(); |
| } |
| |
| LOG(ResourceLoading, "CachedResource %p deleteIfPossible - can't delete (hasClients %d loader %p preloadCount %u handleCount %u resourceToRevalidate %p proxyResource %p)", this, hasClients(), m_loader.get(), m_preloadCount, m_handleCount, m_resourceToRevalidate, m_proxyResource); |
| return false; |
| } |
| |
| void CachedResource::setDecodedSize(unsigned size) |
| { |
| if (size == m_decodedSize) |
| return; |
| |
| long long delta = static_cast<long long>(size) - m_decodedSize; |
| |
| // The object must be moved to a different queue, since its size has been changed. |
| // Remove before updating m_decodedSize, so we find the resource in the correct LRU list. |
| if (allowsCaching() && inCache()) |
| MemoryCache::singleton().removeFromLRUList(*this); |
| |
| m_decodedSize = size; |
| |
| if (allowsCaching() && inCache()) { |
| auto& memoryCache = MemoryCache::singleton(); |
| // Now insert into the new LRU list. |
| memoryCache.insertInLRUList(*this); |
| |
| // Insert into or remove from the live decoded list if necessary. |
| // When inserting into the LiveDecodedResourcesList it is possible |
| // that the m_lastDecodedAccessTime is still zero or smaller than |
| // the m_lastDecodedAccessTime of the current list head. This is a |
| // violation of the invariant that the list is to be kept sorted |
| // by access time. The weakening of the invariant does not pose |
| // a problem. For more details please see: https://bugs.webkit.org/show_bug.cgi?id=30209 |
| bool inLiveDecodedResourcesList = memoryCache.inLiveDecodedResourcesList(*this); |
| if (m_decodedSize && !inLiveDecodedResourcesList && hasClients()) |
| memoryCache.insertInLiveDecodedResourcesList(*this); |
| else if (!m_decodedSize && inLiveDecodedResourcesList) |
| memoryCache.removeFromLiveDecodedResourcesList(*this); |
| |
| // Update the cache's size totals. |
| memoryCache.adjustSize(hasClients(), delta); |
| } |
| } |
| |
| void CachedResource::setEncodedSize(unsigned size) |
| { |
| if (size == m_encodedSize) |
| return; |
| |
| long long delta = static_cast<long long>(size) - m_encodedSize; |
| |
| // The object must be moved to a different queue, since its size has been changed. |
| // Remove before updating m_encodedSize, so we find the resource in the correct LRU list. |
| if (allowsCaching() && inCache()) |
| MemoryCache::singleton().removeFromLRUList(*this); |
| |
| m_encodedSize = size; |
| |
| if (allowsCaching() && inCache()) { |
| auto& memoryCache = MemoryCache::singleton(); |
| memoryCache.insertInLRUList(*this); |
| memoryCache.adjustSize(hasClients(), delta); |
| } |
| } |
| |
| void CachedResource::didAccessDecodedData(MonotonicTime timeStamp) |
| { |
| m_lastDecodedAccessTime = timeStamp; |
| |
| if (allowsCaching() && inCache()) { |
| auto& memoryCache = MemoryCache::singleton(); |
| if (memoryCache.inLiveDecodedResourcesList(*this)) { |
| memoryCache.removeFromLiveDecodedResourcesList(*this); |
| memoryCache.insertInLiveDecodedResourcesList(*this); |
| } |
| memoryCache.pruneSoon(); |
| } |
| } |
| |
| void CachedResource::setResourceToRevalidate(CachedResource* resource) |
| { |
| ASSERT(resource); |
| ASSERT(!m_resourceToRevalidate); |
| ASSERT(resource != this); |
| ASSERT(m_handlesToRevalidate.isEmpty()); |
| ASSERT(resource->type() == type()); |
| ASSERT(!resource->m_proxyResource); |
| |
| LOG(ResourceLoading, "CachedResource %p setResourceToRevalidate %p", this, resource); |
| |
| resource->m_proxyResource = this; |
| m_resourceToRevalidate = resource; |
| } |
| |
| void CachedResource::clearResourceToRevalidate() |
| { |
| ASSERT(m_resourceToRevalidate); |
| ASSERT(m_resourceToRevalidate->m_proxyResource == this); |
| |
| if (m_switchingClientsToRevalidatedResource) |
| return; |
| |
| m_resourceToRevalidate->m_proxyResource = nullptr; |
| m_resourceToRevalidate->deleteIfPossible(); |
| |
| m_handlesToRevalidate.clear(); |
| m_resourceToRevalidate = nullptr; |
| deleteIfPossible(); |
| } |
| |
| void CachedResource::switchClientsToRevalidatedResource() |
| { |
| ASSERT(m_resourceToRevalidate); |
| ASSERT(m_resourceToRevalidate->inCache()); |
| ASSERT(!inCache()); |
| |
| LOG(ResourceLoading, "CachedResource %p switchClientsToRevalidatedResource %p", this, m_resourceToRevalidate); |
| |
| m_switchingClientsToRevalidatedResource = true; |
| for (auto& handle : m_handlesToRevalidate) { |
| handle->m_resource = m_resourceToRevalidate; |
| m_resourceToRevalidate->registerHandle(handle); |
| --m_handleCount; |
| } |
| ASSERT(!m_handleCount); |
| m_handlesToRevalidate.clear(); |
| |
| Vector<CachedResourceClient*> clientsToMove; |
| for (auto& entry : m_clients) { |
| CachedResourceClient* client = entry.key; |
| unsigned count = entry.value; |
| while (count) { |
| clientsToMove.append(client); |
| --count; |
| } |
| } |
| |
| for (auto& client : clientsToMove) |
| removeClient(*client); |
| ASSERT(m_clients.isEmpty()); |
| |
| for (auto& client : clientsToMove) |
| m_resourceToRevalidate->addClientToSet(*client); |
| for (auto& client : clientsToMove) { |
| // Calling didAddClient may do anything, including trying to cancel revalidation. |
| // Assert that it didn't succeed. |
| ASSERT(m_resourceToRevalidate); |
| // Calling didAddClient for a client may end up removing another client. In that case it won't be in the set anymore. |
| if (m_resourceToRevalidate->m_clients.contains(client)) |
| m_resourceToRevalidate->didAddClient(*client); |
| } |
| m_switchingClientsToRevalidatedResource = false; |
| } |
| |
| void CachedResource::updateResponseAfterRevalidation(const ResourceResponse& validatingResponse) |
| { |
| m_responseTimestamp = WallTime::now(); |
| |
| updateResponseHeadersAfterRevalidation(m_response, validatingResponse); |
| } |
| |
| void CachedResource::registerHandle(CachedResourceHandleBase* h) |
| { |
| ++m_handleCount; |
| if (m_resourceToRevalidate) |
| m_handlesToRevalidate.add(h); |
| } |
| |
| void CachedResource::unregisterHandle(CachedResourceHandleBase* h) |
| { |
| ASSERT(m_handleCount > 0); |
| --m_handleCount; |
| |
| if (m_resourceToRevalidate) |
| m_handlesToRevalidate.remove(h); |
| |
| if (!m_handleCount) |
| deleteIfPossible(); |
| } |
| |
| bool CachedResource::canUseCacheValidator() const |
| { |
| if (m_loading || errorOccurred()) |
| return false; |
| |
| if (m_response.cacheControlContainsNoStore()) |
| return false; |
| return m_response.hasCacheValidatorFields(); |
| } |
| |
| CachedResource::RevalidationDecision CachedResource::makeRevalidationDecision(CachePolicy cachePolicy) const |
| { |
| switch (cachePolicy) { |
| case CachePolicyHistoryBuffer: |
| return RevalidationDecision::No; |
| |
| case CachePolicyReload: |
| return RevalidationDecision::YesDueToCachePolicy; |
| |
| case CachePolicyRevalidate: |
| if (m_response.cacheControlContainsImmutable() && m_response.url().protocolIs("https")) { |
| if (isExpired()) |
| return RevalidationDecision::YesDueToExpired; |
| return RevalidationDecision::No; |
| } |
| return RevalidationDecision::YesDueToCachePolicy; |
| |
| case CachePolicyVerify: |
| if (m_response.cacheControlContainsNoCache()) |
| return RevalidationDecision::YesDueToNoCache; |
| // FIXME: Cache-Control:no-store should prevent storing, not reuse. |
| if (m_response.cacheControlContainsNoStore()) |
| return RevalidationDecision::YesDueToNoStore; |
| |
| if (isExpired()) |
| return RevalidationDecision::YesDueToExpired; |
| |
| return RevalidationDecision::No; |
| }; |
| ASSERT_NOT_REACHED(); |
| return RevalidationDecision::No; |
| } |
| |
| bool CachedResource::redirectChainAllowsReuse(ReuseExpiredRedirectionOrNot reuseExpiredRedirection) const |
| { |
| return WebCore::redirectChainAllowsReuse(m_redirectChainCacheStatus, reuseExpiredRedirection); |
| } |
| |
| bool CachedResource::varyHeaderValuesMatch(const ResourceRequest& request) |
| { |
| if (m_varyingHeaderValues.isEmpty()) |
| return true; |
| |
| return verifyVaryingRequestHeaders(cookieJar(), m_varyingHeaderValues, request); |
| } |
| |
| unsigned CachedResource::overheadSize() const |
| { |
| static const int kAverageClientsHashMapSize = 384; |
| return sizeof(CachedResource) + m_response.memoryUsage() + kAverageClientsHashMapSize + m_resourceRequest.url().string().length() * 2; |
| } |
| |
| void CachedResource::setLoadPriority(const Optional<ResourceLoadPriority>& loadPriority) |
| { |
| if (loadPriority) |
| m_loadPriority = loadPriority.value(); |
| else |
| m_loadPriority = defaultPriorityForResourceType(type()); |
| } |
| |
| inline CachedResource::Callback::Callback(CachedResource& resource, CachedResourceClient& client) |
| : m_resource(resource) |
| , m_client(client) |
| , m_timer(*this, &Callback::timerFired) |
| { |
| m_timer.startOneShot(0_s); |
| } |
| |
| inline void CachedResource::Callback::cancel() |
| { |
| if (m_timer.isActive()) |
| m_timer.stop(); |
| } |
| |
| void CachedResource::Callback::timerFired() |
| { |
| m_resource.didAddClient(m_client); |
| } |
| |
| #if USE(FOUNDATION) || USE(SOUP) |
| |
| void CachedResource::tryReplaceEncodedData(SharedBuffer& newBuffer) |
| { |
| if (!m_data) |
| return; |
| |
| if (!mayTryReplaceEncodedData()) |
| return; |
| |
| // We have to do the memcmp because we can't tell if the replacement file backed data is for the |
| // same resource or if we made a second request with the same URL which gave us a different |
| // resource. We have seen this happen for cached POST resources. |
| if (m_data->size() != newBuffer.size() || memcmp(m_data->data(), newBuffer.data(), m_data->size())) |
| return; |
| |
| m_data->clear(); |
| m_data->append(newBuffer); |
| didReplaceSharedBufferContents(); |
| } |
| |
| #endif |
| |
| #if USE(QUICK_LOOK) |
| |
| void CachedResource::previewResponseReceived(const ResourceResponse& response) |
| { |
| ASSERT(response.url().protocolIs(QLPreviewProtocol)); |
| CachedResource::responseReceived(response); |
| } |
| |
| #endif |
| |
| } |
