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// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_LOADER_FETCH_FETCH_CLIENT_SETTINGS_OBJECT_SNAPSHOT_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_LOADER_FETCH_FETCH_CLIENT_SETTINGS_OBJECT_SNAPSHOT_H_
#include "services/network/public/mojom/referrer_policy.mojom-shared.h"
#include "third_party/blink/renderer/platform/cross_thread_copier.h"
#include "third_party/blink/renderer/platform/loader/fetch/fetch_client_settings_object.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/weborigin/kurl.h"
#include "third_party/blink/renderer/platform/weborigin/security_origin.h"
namespace blink {
// This class is needed to copy a FetchClientSettingsObjectSnapshot across
// threads, because it has some members which cannot be transferred across
// threads (AtomicString for example).
// There are some rules / restrictions:
// - This struct cannot contain an object that cannot be transferred across
// threads (e.g., AtomicString)
// - Non-simple members need explicit copying (e.g., String::IsolatedCopy,
// KURL::Copy) rather than the copy constructor or the assignment operator.
struct CrossThreadFetchClientSettingsObjectData {
WTF_MAKE_NONCOPYABLE(CrossThreadFetchClientSettingsObjectData);
USING_FAST_MALLOC(CrossThreadFetchClientSettingsObjectData);
public:
CrossThreadFetchClientSettingsObjectData(
KURL base_url,
scoped_refptr<const SecurityOrigin> security_origin,
network::mojom::ReferrerPolicy referrer_policy,
String outgoing_referrer,
HttpsState https_state)
: base_url(std::move(base_url)),
security_origin(std::move(security_origin)),
referrer_policy(referrer_policy),
outgoing_referrer(std::move(outgoing_referrer)),
https_state(https_state) {}
const KURL base_url;
const scoped_refptr<const SecurityOrigin> security_origin;
const network::mojom::ReferrerPolicy referrer_policy;
const String outgoing_referrer;
const HttpsState https_state;
};
// This takes a partial snapshot of the execution context's states so that an
// instance of this class can be passed to another thread without cross-thread
// synchronization. Don't keep this object persistently, instead create a new
// instance per each "fetch a module script graph" algorithm:
// https://html.spec.whatwg.org/multipage/webappapis.html#fetch-a-module-script-tree
// https://html.spec.whatwg.org/multipage/webappapis.html#fetch-a-module-worker-script-tree
//
// This class should be used only for main worker (worklet) script loading. For
// other resources, FetchClientSettingsObjectImpl should be used. See the class
// level comments on that class.
class PLATFORM_EXPORT FetchClientSettingsObjectSnapshot final
: public FetchClientSettingsObject {
public:
explicit FetchClientSettingsObjectSnapshot(
std::unique_ptr<CrossThreadFetchClientSettingsObjectData>);
FetchClientSettingsObjectSnapshot(
const KURL& base_url,
const scoped_refptr<const SecurityOrigin> security_origin,
network::mojom::ReferrerPolicy referrer_policy,
const String& outgoing_referrer,
HttpsState https_state);
~FetchClientSettingsObjectSnapshot() override = default;
const KURL& BaseURL() const override { return base_url_; }
const SecurityOrigin* GetSecurityOrigin() const override {
return security_origin_.get();
}
network::mojom::ReferrerPolicy GetReferrerPolicy() const override {
return referrer_policy_;
}
const String GetOutgoingReferrer() const override {
return outgoing_referrer_;
}
HttpsState GetHttpsState() const override { return https_state_; }
// Gets a copy of the data suitable for passing to another thread.
std::unique_ptr<CrossThreadFetchClientSettingsObjectData> CopyData() const {
return std::make_unique<CrossThreadFetchClientSettingsObjectData>(
base_url_.Copy(), security_origin_->IsolatedCopy(), referrer_policy_,
outgoing_referrer_.IsolatedCopy(), https_state_);
}
private:
const KURL base_url_;
const scoped_refptr<const SecurityOrigin> security_origin_;
const network::mojom::ReferrerPolicy referrer_policy_;
const String outgoing_referrer_;
const HttpsState https_state_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_LOADER_FETCH_FETCH_CLIENT_SETTINGS_OBJECT_SNAPSHOT_H_