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// Copyright 2018 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_INSTALLED_SCRIPT_READER_H_
#define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_INSTALLED_SCRIPT_READER_H_
#include <memory>
#include "base/memory/raw_ptr.h"
#include "components/services/storage/public/mojom/service_worker_storage_control.mojom.h"
#include "mojo/public/cpp/base/big_buffer.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "mojo/public/cpp/system/data_pipe.h"
#include "mojo/public/cpp/system/simple_watcher.h"
#include "services/network/public/cpp/net_adapters.h"
namespace content {
// Reads a single service worker script from installed script storage. This acts
// as a wrapper of ServiceWorkerResourceReader and converts script code cache
// (metadata) from a BigBuffer to a mojo data pipe.
class ServiceWorkerInstalledScriptReader {
public:
// Do not change the order. This is used for UMA.
enum class FinishedReason {
kNotFinished = 0,
kSuccess = 1,
kNoResponseHeadError = 2,
kCreateDataPipeError = 3,
kConnectionError = 4,
kResponseReaderError = 5,
kMetaDataSenderError = 6,
kNoContextError = 7,
// Add a new type here, then update kMaxValue and enums.xml.
kMaxValue = kNoContextError,
};
// Receives the read data.
class Client {
public:
virtual void OnStarted(
network::mojom::URLResponseHeadPtr response_head,
std::optional<mojo_base::BigBuffer> metadata,
mojo::ScopedDataPipeConsumerHandle body_handle,
mojo::ScopedDataPipeConsumerHandle meta_data_handle) = 0;
// Called after both body and metadata have finished being written to the
// data pipes, or called immediately if an error occurred.
virtual void OnFinished(FinishedReason reason) = 0;
};
// Uses |reader| to read an installed service worker script, and sends it to
// |client|. |client| must outlive this.
ServiceWorkerInstalledScriptReader(
mojo::Remote<storage::mojom::ServiceWorkerResourceReader> reader,
Client* client);
~ServiceWorkerInstalledScriptReader();
// Starts reading the script.
void Start();
private:
class MetaDataSender;
void OnReadResponseHeadComplete(
int result,
network::mojom::URLResponseHeadPtr response_head,
std::optional<mojo_base::BigBuffer> metadata);
void OnReadDataPrepared(
network::mojom::URLResponseHeadPtr response_head,
std::optional<mojo_base::BigBuffer> metadata,
mojo::ScopedDataPipeConsumerHandle body_consumer_handle);
void OnMetaDataSent(bool success);
void OnReaderDisconnected();
void CompleteSendIfNeeded(FinishedReason reason);
bool WasMetadataWritten() const { return !meta_data_sender_; }
bool WasBodyWritten() const { return was_body_written_; }
base::WeakPtr<ServiceWorkerInstalledScriptReader> AsWeakPtr() {
return weak_factory_.GetWeakPtr();
}
void OnComplete(int32_t status);
mojo::Remote<storage::mojom::ServiceWorkerResourceReader> reader_;
// |client_| must outlive this.
raw_ptr<Client> client_;
// For meta data.
std::unique_ptr<MetaDataSender> meta_data_sender_;
// For body.
// Initialized to max uint64_t to default to reading until EOF, but updated
// to an expected body size in OnReadInfoCompete().
uint64_t body_size_ = std::numeric_limits<uint64_t>::max();
bool was_body_written_ = false;
base::WeakPtrFactory<ServiceWorkerInstalledScriptReader> weak_factory_{this};
};
} // namespace content
#endif // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_INSTALLED_SCRIPT_READER_H_
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