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// Copyright 2015 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 CONTENT_BROWSER_DOWNLOAD_URL_DOWNLOADER_H_
#define CONTENT_BROWSER_DOWNLOAD_URL_DOWNLOADER_H_
#include <stdint.h>
#include <memory>
#include "base/memory/weak_ptr.h"
#include "content/browser/download/download_request_core.h"
#include "content/public/browser/download_interrupt_reasons.h"
#include "content/public/browser/download_save_info.h"
#include "content/public/browser/download_url_parameters.h"
#include "content/public/common/referrer.h"
#include "net/url_request/redirect_info.h"
#include "net/url_request/url_request.h"
namespace content {
class ByteStreamReader;
struct DownloadCreateInfo;
class UrlDownloader : public net::URLRequest::Delegate,
public DownloadRequestCore::Delegate {
public:
// Implemented by the owner of UrlDownloader, functions need to be called on
// UI thread.
class Delegate {
public:
// Called after response is handled and the byte stream is established.
virtual void OnUrlDownloaderStarted(
std::unique_ptr<DownloadCreateInfo> download_create_info,
std::unique_ptr<ByteStreamReader> stream_reader,
const DownloadUrlParameters::OnStartedCallback& callback) = 0;
// Called after the connection is cannceled or finished.
virtual void OnUrlDownloaderStopped(UrlDownloader* downloader) = 0;
};
UrlDownloader(std::unique_ptr<net::URLRequest> request,
base::WeakPtr<Delegate> delegate);
~UrlDownloader() override;
static std::unique_ptr<UrlDownloader> BeginDownload(
base::WeakPtr<UrlDownloader::Delegate> delegate,
std::unique_ptr<net::URLRequest> request,
const Referrer& referrer);
private:
class RequestHandle;
void Start();
// URLRequest::Delegate:
void OnReceivedRedirect(net::URLRequest* request,
const net::RedirectInfo& redirect_info,
bool* defer_redirect) override;
void OnResponseStarted(net::URLRequest* request, int net_error) override;
void OnReadCompleted(net::URLRequest* request, int bytes_read) override;
void StartReading(bool is_continuation);
void ResponseCompleted(int net_error);
// DownloadRequestCore::Delegate
void OnStart(
std::unique_ptr<DownloadCreateInfo> download_create_info,
std::unique_ptr<ByteStreamReader> stream_reader,
const DownloadUrlParameters::OnStartedCallback& callback) override;
void OnReadyToRead() override;
void PauseRequest();
void ResumeRequest();
void CancelRequest();
// Called when the UrlDownloader is done with the request. Posts a task to
// remove itself from its download manager, which in turn would cause the
// UrlDownloader to be freed.
void Destroy();
std::unique_ptr<net::URLRequest> request_;
// Live on UI thread, post task to call |delegate_| functions.
base::WeakPtr<Delegate> delegate_;
DownloadRequestCore core_;
base::WeakPtrFactory<UrlDownloader> weak_ptr_factory_;
};
} // namespace content
#endif // CONTENT_BROWSER_DOWNLOAD_URL_DOWNLOADER_H_
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