bool ApplicationCacheHost::shouldLoadResourceFromApplicationCache(const ResourceRequest& originalRequest, ApplicationCacheResource*& resource)
{
ApplicationCache* cache = applicationCache();
if (!cache || !cache->isComplete())
return false;
ResourceRequest request(originalRequest);
if (Frame* loaderFrame = m_documentLoader.frame()) {
if (Document* 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;
}
