ApplicationCacheHost.cpp [plain text]
#include "config.h"
#include "ApplicationCacheHost.h"
#if ENABLE(OFFLINE_WEB_APPLICATIONS)
#include "ApplicationCache.h"
#include "ApplicationCacheGroup.h"
#include "ApplicationCacheResource.h"
#include "DocumentLoader.h"
#include "DOMApplicationCache.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "FrameLoaderClient.h"
#include "MainResourceLoader.h"
#include "ResourceLoader.h"
#include "ResourceRequest.h"
#include "Settings.h"
namespace WebCore {
ApplicationCacheHost::ApplicationCacheHost(DocumentLoader* documentLoader)
: m_domApplicationCache(0)
, m_documentLoader(documentLoader)
, m_defersEvents(true)
, m_candidateApplicationCacheGroup(0)
{
ASSERT(m_documentLoader);
}
ApplicationCacheHost::~ApplicationCacheHost()
{
if (m_applicationCache)
m_applicationCache->group()->disassociateDocumentLoader(m_documentLoader);
else if (m_candidateApplicationCacheGroup)
m_candidateApplicationCacheGroup->disassociateDocumentLoader(m_documentLoader);
}
void ApplicationCacheHost::selectCacheWithoutManifest()
{
ApplicationCacheGroup::selectCacheWithoutManifestURL(m_documentLoader->frame());
}
void ApplicationCacheHost::selectCacheWithManifest(const KURL& manifestURL)
{
ApplicationCacheGroup::selectCache(m_documentLoader->frame(), manifestURL);
}
void ApplicationCacheHost::maybeLoadMainResource(ResourceRequest& request, SubstituteData& substituteData)
{
if (!substituteData.isValid() && isApplicationCacheEnabled()) {
ASSERT(!m_mainResourceApplicationCache);
m_mainResourceApplicationCache = ApplicationCacheGroup::cacheForMainRequest(request, m_documentLoader);
if (m_mainResourceApplicationCache) {
ApplicationCacheResource* resource = m_mainResourceApplicationCache->resourceForRequest(request);
substituteData = SubstituteData(resource->data(),
resource->response().mimeType(),
resource->response().textEncodingName(), KURL());
}
}
}
bool ApplicationCacheHost::maybeLoadFallbackForMainResponse(const ResourceRequest& request, const ResourceResponse& r)
{
if (r.httpStatusCode() / 100 == 4 || r.httpStatusCode() / 100 == 5) {
ASSERT(!m_mainResourceApplicationCache);
if (isApplicationCacheEnabled()) {
m_mainResourceApplicationCache = ApplicationCacheGroup::fallbackCacheForMainRequest(request, documentLoader());
if (scheduleLoadFallbackResourceFromApplicationCache(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()) {
m_mainResourceApplicationCache = ApplicationCacheGroup::fallbackCacheForMainRequest(request, m_documentLoader);
if (scheduleLoadFallbackResourceFromApplicationCache(documentLoader()->mainResourceLoader(), m_mainResourceApplicationCache.get()))
return true;
}
}
return false;
}
void ApplicationCacheHost::mainResourceDataReceived(const char*, int, long long, bool)
{
}
void ApplicationCacheHost::failedLoadingMainResource()
{
ApplicationCacheGroup* group = m_candidateApplicationCacheGroup;
if (!group && m_applicationCache) {
ASSERT(!mainResourceApplicationCache()); group = m_applicationCache->group();
}
if (group)
group->failedLoadingMainResource(m_documentLoader);
}
void ApplicationCacheHost::finishedLoadingMainResource()
{
ApplicationCacheGroup* group = candidateApplicationCacheGroup();
if (!group && applicationCache() && !mainResourceApplicationCache())
group = applicationCache()->group();
if (group)
group->finishedLoadingMainResource(m_documentLoader);
}
bool ApplicationCacheHost::maybeLoadResource(ResourceLoader* loader, ResourceRequest& request, const KURL& originalURL)
{
if (!isApplicationCacheEnabled())
return false;
if (request.url() != originalURL)
return false;
ApplicationCacheResource* resource;
if (!shouldLoadResourceFromApplicationCache(request, resource))
return false;
m_documentLoader->m_pendingSubstituteResources.set(loader, resource);
m_documentLoader->deliverSubstituteResourcesAfterDelay();
return true;
}
bool ApplicationCacheHost::maybeLoadFallbackForRedirect(ResourceLoader* resourceLoader, ResourceRequest& request, const ResourceResponse& redirectResponse)
{
if (!redirectResponse.isNull() && !protocolHostAndPortAreEqual(request.url(), redirectResponse.url()))
if (scheduleLoadFallbackResourceFromApplicationCache(resourceLoader))
return true;
return false;
}
bool ApplicationCacheHost::maybeLoadFallbackForResponse(ResourceLoader* resourceLoader, const ResourceResponse& response)
{
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 (!error.isCancellation())
if (scheduleLoadFallbackResourceFromApplicationCache(resourceLoader))
return true;
return false;
}
bool ApplicationCacheHost::maybeLoadSynchronously(ResourceRequest& request, ResourceError& error, ResourceResponse& response, Vector<char>& data)
{
ApplicationCacheResource* resource;
if (shouldLoadResourceFromApplicationCache(request, resource)) {
if (resource) {
response = resource->response();
data.append(resource->data()->data(), resource->data()->size());
} else {
error = documentLoader()->frameLoader()->client()->cannotShowURLError(request);
}
return true;
}
return false;
}
void ApplicationCacheHost::maybeLoadFallbackSynchronously(const ResourceRequest& request, ResourceError& error, ResourceResponse& response, Vector<char>& data)
{
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();
data.clear();
data.append(resource->data()->data(), resource->data()->size());
}
}
}
bool ApplicationCacheHost::canCacheInPageCache() const
{
return !applicationCache() && !candidateApplicationCacheGroup();
}
void ApplicationCacheHost::setDOMApplicationCache(DOMApplicationCache* domApplicationCache)
{
ASSERT(!m_domApplicationCache || !domApplicationCache);
m_domApplicationCache = domApplicationCache;
}
void ApplicationCacheHost::notifyDOMApplicationCache(EventID id)
{
if (m_defersEvents) {
m_deferredEvents.append(id);
return;
}
if (m_domApplicationCache) {
ExceptionCode ec = 0;
m_domApplicationCache->dispatchEvent(Event::create(DOMApplicationCache::toEventType(id), false, false), ec);
ASSERT(!ec);
}
}
void ApplicationCacheHost::stopDeferringEvents()
{
RefPtr<DocumentLoader> protect(documentLoader());
for (unsigned i = 0; i < m_deferredEvents.size(); ++i) {
EventID id = m_deferredEvents[i];
if (m_domApplicationCache) {
ExceptionCode ec = 0;
m_domApplicationCache->dispatchEvent(Event::create(DOMApplicationCache::toEventType(id), false, false), ec);
ASSERT(!ec);
}
}
m_deferredEvents.clear();
m_defersEvents = false;
}
void ApplicationCacheHost::setCandidateApplicationCacheGroup(ApplicationCacheGroup* group)
{
ASSERT(!m_applicationCache);
m_candidateApplicationCacheGroup = group;
}
void ApplicationCacheHost::setApplicationCache(PassRefPtr<ApplicationCache> applicationCache)
{
if (m_candidateApplicationCacheGroup) {
ASSERT(!m_applicationCache);
m_candidateApplicationCacheGroup = 0;
}
m_applicationCache = applicationCache;
}
bool ApplicationCacheHost::shouldLoadResourceFromApplicationCache(const ResourceRequest& request, ApplicationCacheResource*& resource)
{
ApplicationCache* cache = applicationCache();
if (!cache || !cache->isComplete())
return false;
if (!ApplicationCache::requestIsHTTPOrHTTPSGet(request) || !equalIgnoringCase(request.url().protocol(), cache->manifestResource()->url().protocol()))
return false;
resource = cache->resourceForURL(request.url());
if (!resource && (cache->urlMatchesFallbackNamespace(request.url()) || cache->isURLInOnlineWhitelist(request.url())))
return false;
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 (!ApplicationCache::requestIsHTTPOrHTTPSGet(request))
return false;
KURL fallbackURL;
if (!cache->urlMatchesFallbackNamespace(request.url(), &fallbackURL))
return false;
resource = cache->resourceForURL(fallbackURL);
ASSERT(resource);
return true;
}
bool ApplicationCacheHost::scheduleLoadFallbackResourceFromApplicationCache(ResourceLoader* loader, ApplicationCache* cache)
{
if (!isApplicationCacheEnabled())
return false;
ApplicationCacheResource* resource;
if (!getApplicationCacheFallbackResource(loader->request(), resource, cache))
return false;
m_documentLoader->m_pendingSubstituteResources.set(loader, resource);
m_documentLoader->deliverSubstituteResourcesAfterDelay();
loader->handle()->cancel();
return true;
}
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 ApplicationCacheHost::update()
{
ApplicationCache* cache = applicationCache();
if (!cache)
return false;
cache->group()->update(m_documentLoader->frame(), ApplicationCacheUpdateWithoutBrowsingContext);
return true;
}
bool ApplicationCacheHost::swapCache()
{
ApplicationCache* cache = applicationCache();
if (!cache)
return false;
if (cache->group()->isObsolete()) {
cache->group()->disassociateDocumentLoader(m_documentLoader);
return true;
}
ApplicationCache* newestCache = cache->group()->newestCache();
if (cache == newestCache)
return false;
ASSERT(cache->group() == newestCache->group());
setApplicationCache(newestCache);
return true;
}
bool ApplicationCacheHost::isApplicationCacheEnabled()
{
return m_documentLoader->frame()->settings()
&& m_documentLoader->frame()->settings()->offlineWebApplicationCacheEnabled();
}
}
#endif // ENABLE(OFFLINE_WEB_APPLICATIONS)