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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/preloading/prefetch/contamination_delay_navigation_throttle.h"
#include "content/browser/preloading/prefetch/prefetch_features.h"
#include "content/browser/renderer_host/navigation_request.h"
#include "content/public/browser/navigation_handle.h"
namespace content {
// static
void ContaminationDelayNavigationThrottle::MaybeCreateAndAdd(
NavigationThrottleRegistry& registry) {
if (base::FeatureList::IsEnabled(
features::kPrefetchStateContaminationMitigation)) {
registry.AddThrottle(
std::make_unique<ContaminationDelayNavigationThrottle>(registry));
}
}
ContaminationDelayNavigationThrottle::~ContaminationDelayNavigationThrottle() =
default;
NavigationThrottle::ThrottleCheckResult
ContaminationDelayNavigationThrottle::WillProcessResponse() {
auto* navigation_request = NavigationRequest::From(navigation_handle());
const network::mojom::URLResponseHead* response =
navigation_request->response();
if (response && response->is_prefetch_with_cross_site_contamination) {
CHECK(navigation_request->IsInMainFrame())
<< "subframes should not use prefetches which may span network "
"partitions";
// This delay is approximately the amount of the the request would take if
// we were sending a fresh request over a warm connection.
base::TimeDelta delay = response->load_timing.receive_headers_end -
response->load_timing.send_start;
timer_.Start(FROM_HERE, delay,
base::BindOnce(&ContaminationDelayNavigationThrottle::Resume,
base::Unretained(this)));
return DEFER;
}
return PROCEED;
}
const char* ContaminationDelayNavigationThrottle::GetNameForLogging() {
return "ContaminationDelayNavigationThrottle";
}
} // namespace content
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