in_memory_download.h | Explore in Territory

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_DOWNLOAD_INTERNAL_BACKGROUND_SERVICE_IN_MEMORY_DOWNLOAD_H_
#define COMPONENTS_DOWNLOAD_INTERNAL_BACKGROUND_SERVICE_IN_MEMORY_DOWNLOAD_H_

#include <memory>
#include <string>
#include <string_view>
#include <vector>

#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/task/single_thread_task_runner.h"
#include "base/time/time.h"
#include "components/download/internal/background_service/blob_task_proxy.h"
#include "components/download/public/background_service/blob_context_getter_factory.h"
#include "components/download/public/background_service/download_params.h"
#include "services/network/public/cpp/simple_url_loader.h"
#include "services/network/public/cpp/simple_url_loader_stream_consumer.h"
#include "services/network/public/mojom/url_loader_factory.mojom.h"
#include "services/network/public/mojom/url_response_head.mojom-forward.h"

class GURL;

namespace net {
struct NetworkTrafficAnnotationTag;
}  // namespace net

namespace storage {
class BlobDataHandle;
}  // namespace storage

namespace download {

struct RequestParams;

// Class to start a single download and hold in-memory download data.
// Used by download service in Incognito mode, where download files shouldn't
// be persisted to disk.
//
// Life cycle: The object is created before sending the network request.
// Call Start() to retrieve the blob storage context and send the network
// request.
class InMemoryDownload { … };

// Implementation of InMemoryDownload and uses SimpleURLLoader as network
// backend.
// Threading contract:
// 1. This object lives on the main thread.
// 2. Reading/writing IO buffer from network is done on another thread,
// based on |request_context_getter_|. When complete, main thread is notified.
// 3. After network IO is done, Blob related work is done on IO thread with
// |blob_task_proxy_|, then notify the result to main thread.
class InMemoryDownloadImpl : public network::SimpleURLLoaderStreamConsumer,
                             public InMemoryDownload { … };

}  // namespace download

#endif  // COMPONENTS_DOWNLOAD_INTERNAL_BACKGROUND_SERVICE_IN_MEMORY_DOWNLOAD_H_
chromium/components/download/internal/background_service/in_memory_download.h
