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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_SYNTHETIC_RESPONSE_MANAGER_H_
#define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_SYNTHETIC_RESPONSE_MANAGER_H_
#include "content/browser/service_worker/service_worker_fetch_dispatcher.h"
#include "content/browser/service_worker/service_worker_version.h"
#include "content/common/content_export.h"
#include "content/common/service_worker/race_network_request_read_buffer_manager.h"
#include "content/common/service_worker/race_network_request_write_buffer_manager.h"
#include "third_party/blink/public/common/service_worker/service_worker_status_code.h"
#include "third_party/blink/public/mojom/fetch/fetch_api_response.mojom-forward.h"
#include "third_party/blink/public/mojom/service_worker/service_worker_fetch_response_callback.mojom-forward.h"
#include "third_party/blink/public/mojom/service_worker/service_worker_stream_handle.mojom-forward.h"
namespace content {
// (crbug.com/352578800): `ServiceWorkerSyntheticResponseManager` handles
// requests and responses for SyntheticResponse.
// This class is responsible for 1) initiating a network request, 2) sending
// response headers to `ServiceWorkerVersion` which is persistent across
// navigations, 3) returning the response locally, 4) transferring the response
// data between data pipes.
class CONTENT_EXPORT ServiceWorkerSyntheticResponseManager {
public:
// Indicates the current status to dispatch SyntheticResponse.
// `kNotReady`: required data pipes are not clreated, or there is no local
// response header in `ServiceWorkerVersion`.
// `kReady`: required data pipes are all created, and there is a local
// response header in `ServiceWorkerVersion` already.
enum class SyntheticResponseStatus {
kNotReady,
kReady,
};
using OnReceiveResponseCallback = base::RepeatingCallback<void(
network::mojom::URLResponseHeadPtr response_head,
mojo::ScopedDataPipeConsumerHandle body)>;
using OnCompleteCallback = base::OnceCallback<void(
const network::URLLoaderCompletionStatus& status)>;
using FetchCallback =
base::OnceCallback<void(blink::ServiceWorkerStatusCode,
ServiceWorkerFetchDispatcher::FetchEventResult,
blink::mojom::FetchAPIResponsePtr,
blink::mojom::ServiceWorkerStreamHandlePtr,
blink::mojom::ServiceWorkerFetchEventTimingPtr,
scoped_refptr<ServiceWorkerVersion>)>;
ServiceWorkerSyntheticResponseManager(
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory,
scoped_refptr<ServiceWorkerVersion> version);
ServiceWorkerSyntheticResponseManager(
const ServiceWorkerSyntheticResponseManager&) = delete;
ServiceWorkerSyntheticResponseManager& operator=(
const ServiceWorkerSyntheticResponseManager&) = delete;
~ServiceWorkerSyntheticResponseManager();
void StartRequest(int request_id,
uint32_t options,
const network::ResourceRequest& request,
OnReceiveResponseCallback receive_response_callback,
OnCompleteCallback complete_callback);
void StartSyntheticResponse(FetchCallback callback);
SyntheticResponseStatus Status() const { return status_; }
void SetResponseHead(network::mojom::URLResponseHeadPtr response_head);
private:
class SyntheticResponseURLLoaderClient;
void OnReceiveResponse(network::mojom::URLResponseHeadPtr response_head,
mojo::ScopedDataPipeConsumerHandle body);
void OnComplete(const network::URLLoaderCompletionStatus& status);
// Read response data from the data pipe which has the actual response from
// the network, and keep it in buffer.
void Read(MojoResult result, const mojo::HandleSignalsState& state);
// Write the buffered data to the data pipe, those one endpoint is already
// passed to the client side.
void Write(MojoResult result, const mojo::HandleSignalsState& state);
SyntheticResponseStatus status_ = SyntheticResponseStatus::kNotReady;
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory_;
mojo::PendingRemote<network::mojom::URLLoader> url_loader_;
std::unique_ptr<SyntheticResponseURLLoaderClient> client_;
scoped_refptr<ServiceWorkerVersion> version_;
OnReceiveResponseCallback response_callback_;
OnCompleteCallback complete_callback_;
std::optional<RaceNetworkRequestReadBufferManager> read_buffer_manager_;
std::optional<RaceNetworkRequestWriteBufferManager> write_buffer_manager_;
mojo::Remote<blink::mojom::ServiceWorkerStreamCallback> stream_callback_;
base::WeakPtrFactory<ServiceWorkerSyntheticResponseManager> weak_factory_{
this};
};
} // namespace content
#endif // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_SYNTHETIC_RESPONSE_MANAGER_H_
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