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/*
* Copyright (C) 2008-2016 Apple Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "ApplicationCacheHost.h"
#include "ApplicationCache.h"
#include "ApplicationCacheGroup.h"
#include "ApplicationCacheResource.h"
#include "ContentSecurityPolicy.h"
#include "DocumentLoader.h"
#include "DOMApplicationCache.h"
#include "EventNames.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "FrameLoaderClient.h"
#include "InspectorInstrumentation.h"
#include "Page.h"
#include "ProgressEvent.h"
#include "ResourceHandle.h"
#include "ResourceRequest.h"
#include "Settings.h"
#include "SubresourceLoader.h"
#include <wtf/FileSystem.h>
#include <wtf/UUID.h>
namespace WebCore {
ApplicationCacheHost::ApplicationCacheHost(DocumentLoader& documentLoader)
: m_documentLoader(documentLoader)
{
}
ApplicationCacheHost::~ApplicationCacheHost()
{
ASSERT(!m_applicationCache || !m_candidateApplicationCacheGroup || m_applicationCache->group() == m_candidateApplicationCacheGroup);
if (m_applicationCache)
m_applicationCache->group()->disassociateDocumentLoader(m_documentLoader);
else if (m_candidateApplicationCacheGroup)
m_candidateApplicationCacheGroup->disassociateDocumentLoader(m_documentLoader);
}
void ApplicationCacheHost::selectCacheWithoutManifest()
{
ASSERT(m_documentLoader.frame());
ApplicationCacheGroup::selectCacheWithoutManifestURL(*m_documentLoader.frame());
}
void ApplicationCacheHost::selectCacheWithManifest(const URL& manifestURL)
{
ASSERT(m_documentLoader.frame());
ApplicationCacheGroup::selectCache(*m_documentLoader.frame(), manifestURL);
}
void ApplicationCacheHost::maybeLoadMainResource(const ResourceRequest& request, SubstituteData& substituteData)
{
// Check if this request should be loaded from the application cache
if (!substituteData.isValid() && isApplicationCacheEnabled() && !isApplicationCacheBlockedForRequest(request)) {
ASSERT(!m_mainResourceApplicationCache);
m_mainResourceApplicationCache = ApplicationCacheGroup::cacheForMainRequest(request, &m_documentLoader);
if (m_mainResourceApplicationCache) {
// Get the resource from the application cache. By definition, cacheForMainRequest() returns a cache that contains the resource.
ApplicationCacheResource* resource = m_mainResourceApplicationCache->resourceForRequest(request);
// ApplicationCache resources have fragment identifiers stripped off of their URLs,
// but we'll need to restore that for the SubstituteData.
ResourceResponse responseToUse = resource->response();
if (request.url().hasFragmentIdentifier()) {
URL url = responseToUse.url();
url.setFragmentIdentifier(request.url().fragmentIdentifier());
responseToUse.setURL(url);
}
substituteData = SubstituteData(&resource->data(),
URL(),
responseToUse,
SubstituteData::SessionHistoryVisibility::Visible);
}
}
}
void ApplicationCacheHost::maybeLoadMainResourceForRedirect(const ResourceRequest& request, SubstituteData& substituteData)
{
ASSERT(status() == UNCACHED);
maybeLoadMainResource(request, substituteData);
}
bool ApplicationCacheHost::maybeLoadFallbackForMainResponse(const ResourceRequest& request, const ResourceResponse& r)
{
if (r.httpStatusCode() / 100 == 4 || r.httpStatusCode() / 100 == 5) {
ASSERT(!m_mainResourceApplicationCache);
if (isApplicationCacheEnabled() && !isApplicationCacheBlockedForRequest(request)) {
m_mainResourceApplicationCache = ApplicationCacheGroup::fallbackCacheForMainRequest(request, &m_documentLoader);
if (scheduleLoadFallbackResourceFromApplicationCache(m_documentLoader.mainResourceLoader(), m_mainResourceApplicationCache.get()))
return true;
}
}
return false;
}
bool ApplicationCacheHost::maybeLoadFallbackForMainError(const ResourceRequest& request, const ResourceError& error)
{
if (!error.isCancellation()) {
ASSERT(!m_mainResourceApplicationCache);
if (isApplicationCacheEnabled() && !isApplicationCacheBlockedForRequest(request)) {
m_mainResourceApplicationCache = ApplicationCacheGroup::fallbackCacheForMainRequest(request, &m_documentLoader);
if (scheduleLoadFallbackResourceFromApplicationCache(m_documentLoader.mainResourceLoader(), m_mainResourceApplicationCache.get()))
return true;
}
}
return false;
}
void ApplicationCacheHost::mainResourceDataReceived(const char*, int, long long, bool)
{
}
void ApplicationCacheHost::failedLoadingMainResource()
{
auto* group = m_candidateApplicationCacheGroup;
if (!group && m_applicationCache) {
if (mainResourceApplicationCache()) {
// Even when the main resource is being loaded from an application cache, loading can fail if aborted.
return;
}
group = m_applicationCache->group();
}
if (group)
group->failedLoadingMainResource(m_documentLoader);
}
void ApplicationCacheHost::finishedLoadingMainResource()
{
auto* group = candidateApplicationCacheGroup();
if (!group && applicationCache() && !mainResourceApplicationCache())
group = applicationCache()->group();
if (group)
group->finishedLoadingMainResource(m_documentLoader);
}
bool ApplicationCacheHost::maybeLoadResource(ResourceLoader& loader, const ResourceRequest& request, const URL& originalURL)
{
if (loader.options().applicationCacheMode != ApplicationCacheMode::Use)
return false;
if (!isApplicationCacheEnabled() && !isApplicationCacheBlockedForRequest(request))
return false;
if (request.url() != originalURL)
return false;
#if ENABLE(SERVICE_WORKER)
if (loader.options().serviceWorkerRegistrationIdentifier)
return false;
#endif
ApplicationCacheResource* resource;
if (!shouldLoadResourceFromApplicationCache(request, resource))
return false;
if (resource)
m_documentLoader.scheduleSubstituteResourceLoad(loader, *resource);
else
m_documentLoader.scheduleCannotShowURLError(loader);
return true;
}
bool ApplicationCacheHost::maybeLoadFallbackForRedirect(ResourceLoader* resourceLoader, ResourceRequest& request, const ResourceResponse& redirectResponse)
{
if (resourceLoader && resourceLoader->options().applicationCacheMode != ApplicationCacheMode::Use)
return false;
if (!redirectResponse.isNull() && !protocolHostAndPortAreEqual(request.url(), redirectResponse.url())) {
if (scheduleLoadFallbackResourceFromApplicationCache(resourceLoader))
return true;
}
return false;
}
bool ApplicationCacheHost::maybeLoadFallbackForResponse(ResourceLoader* resourceLoader, const ResourceResponse& response)
{
if (resourceLoader && resourceLoader->options().applicationCacheMode != ApplicationCacheMode::Use)
return false;
if (response.httpStatusCode() / 100 == 4 || response.httpStatusCode() / 100 == 5) {
if (scheduleLoadFallbackResourceFromApplicationCache(resourceLoader))
return true;
}
return false;
}
bool ApplicationCacheHost::maybeLoadFallbackForError(ResourceLoader* resourceLoader, const ResourceError& error)
{
if (resourceLoader && resourceLoader->options().applicationCacheMode != ApplicationCacheMode::Use)
return false;
if (!error.isCancellation()) {
if (resourceLoader == m_documentLoader.mainResourceLoader())
return maybeLoadFallbackForMainError(resourceLoader->request(), error);
if (scheduleLoadFallbackResourceFromApplicationCache(resourceLoader))
return true;
}
return false;
}
URL ApplicationCacheHost::createFileURL(const String& path)
{
// FIXME: Can we just use fileURLWithFileSystemPath instead?
#if USE(CF) && PLATFORM(WIN)
URL url(adoptCF(CFURLCreateWithFileSystemPath(0, path.createCFString().get(), kCFURLWindowsPathStyle, false)).get());
#else
URL url;
url.setProtocol("file"_s);
url.setPath(path);
#endif
return url;
}
static inline RefPtr<SharedBuffer> bufferFromResource(ApplicationCacheResource& resource)
{
// FIXME: Clients probably do not need a copy of the SharedBuffer.
// Remove the call to copy() once we ensure SharedBuffer will not be modified.
if (resource.path().isEmpty())
return resource.data().copy();
return SharedBuffer::createWithContentsOfFile(resource.path());
}
bool ApplicationCacheHost::maybeLoadSynchronously(ResourceRequest& request, ResourceError& error, ResourceResponse& response, RefPtr<SharedBuffer>& data)
{
ApplicationCacheResource* resource;
if (!shouldLoadResourceFromApplicationCache(request, resource))
return false;
auto responseData = resource ? bufferFromResource(*resource) : nullptr;
if (!responseData) {
error = m_documentLoader.frameLoader()->client().cannotShowURLError(request);
return true;
}
response = resource->response();
data = WTFMove(responseData);
return true;
}
void ApplicationCacheHost::maybeLoadFallbackSynchronously(const ResourceRequest& request, ResourceError& error, ResourceResponse& response, RefPtr<SharedBuffer>& data)
{
// If normal loading results in a redirect to a resource with another origin (indicative of a captive portal), or a 4xx or 5xx status code or equivalent,
// or if there were network errors (but not if the user canceled the download), then instead get, from the cache, the resource of the fallback entry
// corresponding to the matched namespace.
if ((!error.isNull() && !error.isCancellation())
|| response.httpStatusCode() / 100 == 4 || response.httpStatusCode() / 100 == 5
|| !protocolHostAndPortAreEqual(request.url(), response.url())) {
ApplicationCacheResource* resource;
if (getApplicationCacheFallbackResource(request, resource)) {
response = resource->response();
// FIXME: Clients proably do not need a copy of the SharedBuffer.
// Remove the call to copy() once we ensure SharedBuffer will not be modified.
data = resource->data().copy();
}
}
}
bool ApplicationCacheHost::canCacheInPageCache()
{
return !applicationCache() && !candidateApplicationCacheGroup();
}
void ApplicationCacheHost::setDOMApplicationCache(DOMApplicationCache* domApplicationCache)
{
ASSERT(!m_domApplicationCache || !domApplicationCache);
m_domApplicationCache = makeWeakPtr(domApplicationCache);
}
void ApplicationCacheHost::notifyDOMApplicationCache(const AtomicString& eventType, int total, int done)
{
if (eventType != eventNames().progressEvent)
InspectorInstrumentation::updateApplicationCacheStatus(m_documentLoader.frame());
if (m_defersEvents) {
// Event dispatching is deferred until document.onload has fired.
m_deferredEvents.append({ eventType, total, done });
return;
}
dispatchDOMEvent(eventType, total, done);
}
void ApplicationCacheHost::stopLoadingInFrame(Frame& frame)
{
ASSERT(!m_applicationCache || !m_candidateApplicationCacheGroup || m_applicationCache->group() == m_candidateApplicationCacheGroup);
if (m_candidateApplicationCacheGroup)
m_candidateApplicationCacheGroup->stopLoadingInFrame(frame);
else if (m_applicationCache)
m_applicationCache->group()->stopLoadingInFrame(frame);
}
void ApplicationCacheHost::stopDeferringEvents()
{
Ref<DocumentLoader> protect(m_documentLoader);
// Note, do not cache the size in a local variable.
// This code needs to properly handle the case where more events are added to
// m_deferredEvents while iterating it. This is why we don't use a modern for loop.
for (size_t i = 0; i < m_deferredEvents.size(); ++i) {
auto& event = m_deferredEvents[i];
dispatchDOMEvent(event.eventType, event.progressTotal, event.progressDone);
}
m_deferredEvents.clear();
m_defersEvents = false;
}
Vector<ApplicationCacheHost::ResourceInfo> ApplicationCacheHost::resourceList()
{
auto* cache = applicationCache();
if (!cache || !cache->isComplete())
return { };
return WTF::map(cache->resources(), [] (auto& urlAndResource) -> ApplicationCacheHost::ResourceInfo {
ASSERT(urlAndResource.value);
auto& 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;
return { resource.url(), isMaster, isManifest, isFallback, isForeign, isExplicit, resource.estimatedSizeInStorage() };
});
}
ApplicationCacheHost::CacheInfo ApplicationCacheHost::applicationCacheInfo()
{
auto* cache = applicationCache();
if (!cache || !cache->isComplete())
return { { }, 0, 0, 0 };
// FIXME: Add "Creation Time" and "Update Time" to Application Caches.
return { cache->manifestResource()->url(), 0, 0, cache->estimatedSizeInStorage() };
}
static Ref<Event> createApplicationCacheEvent(const AtomicString& eventType, int total, int done)
{
if (eventType == eventNames().progressEvent)
return ProgressEvent::create(eventType, true, done, total);
return Event::create(eventType, Event::CanBubble::No, Event::IsCancelable::No);
}
void ApplicationCacheHost::dispatchDOMEvent(const AtomicString& eventType, int total, int done)
{
if (!m_domApplicationCache || !m_domApplicationCache->frame())
return;
m_domApplicationCache->dispatchEvent(createApplicationCacheEvent(eventType, total, done));
}
void ApplicationCacheHost::setCandidateApplicationCacheGroup(ApplicationCacheGroup* group)
{
ASSERT(!m_applicationCache);
m_candidateApplicationCacheGroup = group;
}
void ApplicationCacheHost::setApplicationCache(RefPtr<ApplicationCache>&& applicationCache)
{
if (m_candidateApplicationCacheGroup) {
ASSERT(!m_applicationCache);
m_candidateApplicationCacheGroup = nullptr;
}
m_applicationCache = WTFMove(applicationCache);
}
bool ApplicationCacheHost::shouldLoadResourceFromApplicationCache(const ResourceRequest& originalRequest, ApplicationCacheResource*& resource)
{
auto* cache = applicationCache();
if (!cache || !cache->isComplete())
return false;
ResourceRequest request(originalRequest);
if (auto* loaderFrame = m_documentLoader.frame()) {
if (auto* 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;
}
bool ApplicationCacheHost::getApplicationCacheFallbackResource(const ResourceRequest& request, ApplicationCacheResource*& resource, ApplicationCache* cache)
{
if (!cache) {
cache = applicationCache();
if (!cache)
return false;
}
if (!cache->isComplete())
return false;
// If the resource is not a HTTP/HTTPS GET, then abort
if (!ApplicationCache::requestIsHTTPOrHTTPSGet(request))
return false;
URL fallbackURL;
if (cache->isURLInOnlineWhitelist(request.url()))
return false;
if (!cache->urlMatchesFallbackNamespace(request.url(), &fallbackURL))
return false;
resource = cache->resourceForURL(fallbackURL);
ASSERT(resource);
return true;
}
bool ApplicationCacheHost::scheduleLoadFallbackResourceFromApplicationCache(ResourceLoader* loader, ApplicationCache* cache)
{
if (!loader)
return false;
if (!isApplicationCacheEnabled() && !isApplicationCacheBlockedForRequest(loader->request()))
return false;
#if ENABLE(SERVICE_WORKER)
if (loader->options().serviceWorkerRegistrationIdentifier)
return false;
#endif
ApplicationCacheResource* resource;
if (!getApplicationCacheFallbackResource(loader->request(), resource, cache))
return false;
loader->willSwitchToSubstituteResource();
m_documentLoader.scheduleSubstituteResourceLoad(*loader, *resource);
return true;
}
ApplicationCacheHost::Status ApplicationCacheHost::status() const
{
auto* 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 ApplicationCacheHost::update()
{
auto* cache = applicationCache();
if (!cache)
return false;
auto* frame = m_documentLoader.frame();
if (!frame)
return false;
cache->group()->update(*frame, ApplicationCacheUpdateWithoutBrowsingContext);
return true;
}
bool ApplicationCacheHost::swapCache()
{
auto* 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 InvalidStateError exception.
auto* newestCache = cache->group()->newestCache();
if (cache == newestCache)
return false;
ASSERT(cache->group() == newestCache->group());
setApplicationCache(newestCache);
InspectorInstrumentation::updateApplicationCacheStatus(m_documentLoader.frame());
return true;
}
void ApplicationCacheHost::abort()
{
auto* frame = m_documentLoader.frame();
if (!frame)
return;
if (auto* cacheGroup = candidateApplicationCacheGroup())
cacheGroup->abort(*frame);
else if (auto* cache = applicationCache())
cache->group()->abort(*frame);
}
bool ApplicationCacheHost::isApplicationCacheEnabled()
{
return m_documentLoader.frame() && m_documentLoader.frame()->settings().offlineWebApplicationCacheEnabled() && !m_documentLoader.frame()->page()->usesEphemeralSession();
}
bool ApplicationCacheHost::isApplicationCacheBlockedForRequest(const ResourceRequest& request)
{
auto* frame = m_documentLoader.frame();
if (!frame)
return false;
if (frame->isMainFrame())
return false;
return !SecurityOrigin::create(request.url())->canAccessApplicationCache(frame->document()->topOrigin());
}
} // namespace WebCore