ApplicationCacheGroup* ApplicationCacheStorage::fallbackCacheGroupForURL(const KURL& url)
{
ASSERT(!url.hasFragmentIdentifier());
// Check if an appropriate cache already exists in memory.
CacheGroupMap::const_iterator end = m_cachesInMemory.end();
for (CacheGroupMap::const_iterator it = m_cachesInMemory.begin(); it != end; ++it) {
ApplicationCacheGroup* group = it->second;
ASSERT(!group->isObsolete());
if (ApplicationCache* cache = group->newestCache()) {
KURL fallbackURL;
if (!cache->urlMatchesFallbackNamespace(url, &fallbackURL))
continue;
if (cache->resourceForURL(fallbackURL)->type() & ApplicationCacheResource::Foreign)
continue;
return group;
}
}
if (!m_database.isOpen())
return 0;
// Check the database. Look for all cache groups with a newest cache.
SQLiteStatement statement(m_database, "SELECT id, manifestURL, newestCache FROM CacheGroups WHERE newestCache IS NOT NULL");
if (statement.prepare() != SQLResultOk)
return 0;
int result;
while ((result = statement.step()) == SQLResultRow) {
KURL manifestURL = KURL(ParsedURLString, statement.getColumnText(1));
if (m_cachesInMemory.contains(manifestURL))
continue;
// Fallback namespaces always have the same origin as manifest URL, so we can avoid loading caches that cannot match.
if (!protocolHostAndPortAreEqual(url, manifestURL))
continue;
// We found a cache group that matches. Now check if the newest cache has a resource with
// a matching fallback namespace.
unsigned newestCacheID = static_cast<unsigned>(statement.getColumnInt64(2));
RefPtr<ApplicationCache> cache = loadCache(newestCacheID);
KURL fallbackURL;
if (!cache->urlMatchesFallbackNamespace(url, &fallbackURL))
continue;
if (cache->resourceForURL(fallbackURL)->type() & ApplicationCacheResource::Foreign)
continue;
ApplicationCacheGroup* group = new ApplicationCacheGroup(manifestURL);
group->setStorageID(static_cast<unsigned>(statement.getColumnInt64(0)));
group->setNewestCache(cache.release());
m_cachesInMemory.set(group->manifestURL(), group);
return group;
}
if (result != SQLResultDone)
LOG_ERROR("Could not load cache group, error \"%s\"", m_database.lastErrorMsg());
return 0;
}
ApplicationCacheGroup* ApplicationCacheStorage::cacheGroupForURL(const KURL& url)
{
ASSERT(!url.hasFragmentIdentifier());
loadManifestHostHashes();
// Hash the host name and see if there's a manifest with the same host.
if (!m_cacheHostSet.contains(urlHostHash(url)))
return 0;
// Check if a cache already exists in memory.
CacheGroupMap::const_iterator end = m_cachesInMemory.end();
for (CacheGroupMap::const_iterator it = m_cachesInMemory.begin(); it != end; ++it) {
ApplicationCacheGroup* group = it->second;
ASSERT(!group->isObsolete());
if (!protocolHostAndPortAreEqual(url, group->manifestURL()))
continue;
if (ApplicationCache* cache = group->newestCache()) {
ApplicationCacheResource* resource = cache->resourceForURL(url);
if (!resource)
continue;
if (resource->type() & ApplicationCacheResource::Foreign)
continue;
return group;
}
}
if (!m_database.isOpen())
return 0;
// Check the database. Look for all cache groups with a newest cache.
SQLiteStatement statement(m_database, "SELECT id, manifestURL, newestCache FROM CacheGroups WHERE newestCache IS NOT NULL");
if (statement.prepare() != SQLResultOk)
return 0;
int result;
while ((result = statement.step()) == SQLResultRow) {
KURL manifestURL = KURL(ParsedURLString, statement.getColumnText(1));
if (m_cachesInMemory.contains(manifestURL))
continue;
if (!protocolHostAndPortAreEqual(url, manifestURL))
continue;
// We found a cache group that matches. Now check if the newest cache has a resource with
// a matching URL.
unsigned newestCacheID = static_cast<unsigned>(statement.getColumnInt64(2));
RefPtr<ApplicationCache> cache = loadCache(newestCacheID);
if (!cache)
continue;
ApplicationCacheResource* resource = cache->resourceForURL(url);
if (!resource)
continue;
if (resource->type() & ApplicationCacheResource::Foreign)
continue;
#if OS(OLYMPIA)
ApplicationCacheGroup* group = new ApplicationCacheGroup(this, manifestURL);
#else
ApplicationCacheGroup* group = new ApplicationCacheGroup(manifestURL);
#endif
group->setStorageID(static_cast<unsigned>(statement.getColumnInt64(0)));
group->setNewestCache(cache.release());
m_cachesInMemory.set(group->manifestURL(), group);
return group;
}
if (result != SQLResultDone)
LOG_ERROR("Could not load cache group, error \"%s\"", m_database.lastErrorMsg());
return 0;
}