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// Copyright 2023 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/common/service_worker/service_worker_resource_loader.h"
#include "base/check_op.h"
#include "base/feature_list.h"
#include "base/metrics/histogram_macros.h"
#include "base/trace_event/trace_event.h"
#include "content/public/common/content_features.h"
#include "services/network/public/mojom/service_worker_router_info.mojom-shared.h"
namespace content {
ServiceWorkerResourceLoader::ServiceWorkerResourceLoader() = default;
ServiceWorkerResourceLoader::~ServiceWorkerResourceLoader() = default;
void ServiceWorkerResourceLoader::SetCommitResponsibility(
FetchResponseFrom fetch_response_from) {
TRACE_EVENT_WITH_FLOW2(
"ServiceWorker", "ServiceWorkerResourceLoader::SetCommitResponsibility",
this, TRACE_EVENT_FLAG_FLOW_IN | TRACE_EVENT_FLAG_FLOW_OUT,
"commit_responsibility_", commit_responsibility_, "fetch_response_from",
fetch_response_from);
switch (fetch_response_from) {
case FetchResponseFrom::kNoResponseYet:
NOTREACHED();
case FetchResponseFrom::kSubresourceLoaderIsHandlingRedirect:
// kSubresourceLoaderIsHandlingRedirect is called only from subresources.
CHECK(!IsMainResourceLoader());
CHECK(commit_responsibility_ == FetchResponseFrom::kServiceWorker ||
commit_responsibility_ == FetchResponseFrom::kWithoutServiceWorker);
break;
case FetchResponseFrom::kAutoPreloadHandlingFallback:
CHECK(base::FeatureList::IsEnabled(features::kServiceWorkerAutoPreload));
CHECK_EQ(commit_responsibility_, FetchResponseFrom::kServiceWorker);
break;
case FetchResponseFrom::kServiceWorker:
if (IsMainResourceLoader()) {
CHECK_EQ(commit_responsibility_, FetchResponseFrom::kNoResponseYet);
} else {
CHECK(commit_responsibility_ == FetchResponseFrom::kNoResponseYet ||
commit_responsibility_ ==
FetchResponseFrom::kSubresourceLoaderIsHandlingRedirect);
}
break;
case FetchResponseFrom::kWithoutServiceWorker:
if (IsMainResourceLoader()) {
CHECK(commit_responsibility_ == FetchResponseFrom::kNoResponseYet ||
commit_responsibility_ ==
FetchResponseFrom::kAutoPreloadHandlingFallback);
} else {
CHECK(commit_responsibility_ == FetchResponseFrom::kNoResponseYet ||
commit_responsibility_ ==
FetchResponseFrom::kSubresourceLoaderIsHandlingRedirect ||
commit_responsibility_ ==
FetchResponseFrom::kAutoPreloadHandlingFallback);
}
break;
}
commit_responsibility_ = fetch_response_from;
}
void ServiceWorkerResourceLoader::RecordFetchResponseFrom() {
CHECK(commit_responsibility_ == FetchResponseFrom::kServiceWorker ||
commit_responsibility_ == FetchResponseFrom::kWithoutServiceWorker);
if (IsMainResourceLoader()) {
UMA_HISTOGRAM_ENUMERATION(
"ServiceWorker.FetchEvent.MainResource.FetchResponseFrom",
commit_responsibility_);
} else {
UMA_HISTOGRAM_ENUMERATION(
"ServiceWorker.FetchEvent.Subresource.FetchResponseFrom",
commit_responsibility_);
}
}
void ServiceWorkerResourceLoader::SetDispatchedPreloadType(
DispatchedPreloadType type) {
CHECK_NE(type, DispatchedPreloadType::kNone);
if (!IsMainResourceLoader()) {
CHECK_NE(type, DispatchedPreloadType::kNavigationPreload);
}
dispatched_preload_type_ = type;
}
bool ServiceWorkerResourceLoader::ShouldRecordServiceWorkerFetchStart() {
if (!matched_router_source_type_.has_value()) {
return true;
}
switch (*matched_router_source_type_) {
case network::mojom::ServiceWorkerRouterSourceType::kNetwork:
case network::mojom::ServiceWorkerRouterSourceType::kCache:
case network::mojom::ServiceWorkerRouterSourceType::kRaceNetworkAndCache:
return false;
case network::mojom::ServiceWorkerRouterSourceType::
kRaceNetworkAndFetchEvent:
case network::mojom::ServiceWorkerRouterSourceType::kFetchEvent:
// These source should start ServiceWorker and trigger fetch-event.
return true;
}
}
bool ServiceWorkerResourceLoader::IsMatchedRouterSourceType(
network::mojom::ServiceWorkerRouterSourceType type) {
if (!matched_router_source_type_.has_value()) {
return false;
}
return *matched_router_source_type_ == type;
}
} // namespace content
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