bool DocumentLoader::shouldContinueForNavigationPolicy(const ResourceRequest& request)
{
NavigationAction action = triggeringAction();
if (action.isEmpty()) {
action = NavigationAction(request, NavigationTypeOther);
setTriggeringAction(action);
}
// Don't ask if we are loading an empty URL.
if (!request.isNull() && request.url().isEmpty())
return true;
// We are always willing to show alternate content for unreachable URLs;
// treat it like a reload so it maintains the right state for b/f list.
if (m_substituteData.isValid() && !m_substituteData.failingURL().isEmpty()) {
if (isBackForwardLoadType(frameLoader()->loadType()))
frameLoader()->setLoadType(FrameLoadTypeReload);
return true;
}
// If we're loading content into a subframe, check against the parent's Content Security Policy
// and kill the load if that check fails.
if (m_frame->ownerElement() && !m_frame->ownerElement()->document()->contentSecurityPolicy()->allowChildFrameFromSource(request.url()))
return false;
PolicyAction policy = frameLoader()->client()->decidePolicyForNavigationAction(action, request);
if (policy == PolicyDownload) {
ResourceRequest mutableRequest(request);
frameLoader()->setOriginalURLForDownloadRequest(mutableRequest);
frameLoader()->client()->startDownload(mutableRequest);
}
return policy == PolicyUse;
}
void PolicyChecker::checkNavigationPolicy(const ResourceRequest& request, DocumentLoader* loader,
PassRefPtr<FormState> formState, NavigationPolicyDecisionFunction function, void* argument)
{
NavigationAction action = loader->triggeringAction();
if (action.isEmpty()) {
action = NavigationAction(request.url(), NavigationTypeOther);
loader->setTriggeringAction(action);
}
// Don't ask more than once for the same request or if we are loading an empty URL.
// This avoids confusion on the part of the client.
if (equalIgnoringHeaderFields(request, loader->lastCheckedRequest()) || (!request.isNull() && request.url().isEmpty())) {
function(argument, request, 0, true);
loader->setLastCheckedRequest(request);
return;
}
// We are always willing to show alternate content for unreachable URLs;
// treat it like a reload so it maintains the right state for b/f list.
if (loader->substituteData().isValid() && !loader->substituteData().failingURL().isEmpty()) {
if (isBackForwardLoadType(m_loadType))
m_loadType = FrameLoadTypeReload;
function(argument, request, 0, true);
return;
}
loader->setLastCheckedRequest(request);
m_callback.set(request, formState.get(), function, argument);
m_delegateIsDecidingNavigationPolicy = true;
m_frame->loader()->client()->dispatchDecidePolicyForNavigationAction(&PolicyChecker::continueAfterNavigationPolicy,
action, request, formState);
m_delegateIsDecidingNavigationPolicy = false;
}
void PolicyChecker::checkNavigationPolicy(const ResourceRequest& request, bool didReceiveRedirectResponse, DocumentLoader* loader, PassRefPtr<FormState> formState, NavigationPolicyDecisionFunction function)
{
NavigationAction action = loader->triggeringAction();
if (action.isEmpty()) {
action = NavigationAction(request, NavigationType::Other, loader->shouldOpenExternalURLsPolicyToPropagate());
loader->setTriggeringAction(action);
}
// Don't ask more than once for the same request or if we are loading an empty URL.
// This avoids confusion on the part of the client.
if (equalIgnoringHeaderFields(request, loader->lastCheckedRequest()) || (!request.isNull() && request.url().isEmpty())) {
function(request, 0, true);
loader->setLastCheckedRequest(request);
return;
}
// We are always willing to show alternate content for unreachable URLs;
// treat it like a reload so it maintains the right state for b/f list.
if (loader->substituteData().isValid() && !loader->substituteData().failingURL().isEmpty()) {
if (isBackForwardLoadType(m_loadType))
m_loadType = FrameLoadType::Reload;
function(request, 0, true);
return;
}
if (!isAllowedByContentSecurityPolicy(request.url(), m_frame.ownerElement(), didReceiveRedirectResponse)) {
function(request, 0, false);
return;
}
loader->setLastCheckedRequest(request);
m_callback.set(request, formState.get(), WTFMove(function));
#if USE(QUICK_LOOK)
// Always allow QuickLook-generated URLs based on the protocol scheme.
if (!request.isNull() && request.url().protocolIs(QLPreviewProtocol())) {
continueAfterNavigationPolicy(PolicyUse);
return;
}
#endif
#if ENABLE(CONTENT_FILTERING)
if (m_contentFilterUnblockHandler.canHandleRequest(request)) {
RefPtr<Frame> frame { &m_frame };
m_contentFilterUnblockHandler.requestUnblockAsync([frame](bool unblocked) {
if (unblocked)
frame->loader().reload();
});
continueAfterNavigationPolicy(PolicyIgnore);
return;
}
m_contentFilterUnblockHandler = { };
#endif
m_delegateIsDecidingNavigationPolicy = true;
m_suggestedFilename = action.downloadAttribute();
m_frame.loader().client().dispatchDecidePolicyForNavigationAction(action, request, formState, [this](PolicyAction action) {
continueAfterNavigationPolicy(action);
});
m_delegateIsDecidingNavigationPolicy = false;
}