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// Copyright (c) 2012 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_DOWNLOAD_RESOURCE_HANDLER_H_
#define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_RESOURCE_HANDLER_H_
#include <stdint.h>
#include <string>
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "content/browser/download/download_request_core.h"
#include "content/browser/loader/resource_handler.h"
#include "content/public/browser/download_interrupt_reasons.h"
#include "content/public/browser/download_manager.h"
#include "content/public/browser/download_save_info.h"
#include "content/public/browser/download_url_parameters.h"
namespace net {
class URLRequest;
} // namespace net
namespace content {
class ByteStreamReader;
class ByteStreamWriter;
class DownloadRequestHandle;
class PowerSaveBlocker;
struct DownloadCreateInfo;
// Forwards data to the download thread.
class CONTENT_EXPORT DownloadResourceHandler
: public ResourceHandler,
public DownloadRequestCore::Delegate,
public base::SupportsWeakPtr<DownloadResourceHandler> {
public:
struct DownloadTabInfo;
// started_cb will be called exactly once on the UI thread.
// |id| should be invalid if the id should be automatically assigned.
DownloadResourceHandler(net::URLRequest* request);
bool OnRequestRedirected(const net::RedirectInfo& redirect_info,
ResourceResponse* response,
bool* defer) override;
// Send the download creation information to the download thread.
bool OnResponseStarted(ResourceResponse* response, bool* defer) override;
// Pass-through implementation.
bool OnWillStart(const GURL& url, bool* defer) override;
// Pass-through implementation.
bool OnBeforeNetworkStart(const GURL& url, bool* defer) override;
// Create a new buffer, which will be handed to the download thread for file
// writing and deletion.
bool OnWillRead(scoped_refptr<net::IOBuffer>* buf,
int* buf_size,
int min_size) override;
bool OnReadCompleted(int bytes_read, bool* defer) override;
void OnResponseCompleted(const net::URLRequestStatus& status,
const std::string& security_info,
bool* defer) override;
// N/A to this flavor of DownloadHandler.
void OnDataDownloaded(int bytes_downloaded) override;
void PauseRequest();
void ResumeRequest();
// May result in this object being deleted by its owner.
void CancelRequest();
std::string DebugString() const;
private:
~DownloadResourceHandler() override;
// DownloadRequestCore::Delegate
void OnStart(
scoped_ptr<DownloadCreateInfo> download_create_info,
scoped_ptr<ByteStreamReader> stream_reader,
const DownloadUrlParameters::OnStartedCallback& callback) override;
void OnReadyToRead() override;
// Stores information about the download that must be acquired on the UI
// thread before StartOnUIThread is called.
// Created on IO thread, but only accessed on UI thread. |tab_info_| holds
// the pointer until we pass it off to StartOnUIThread or DeleteSoon.
// Marked as a scoped_ptr<> to indicate ownership of the structure, but
// deletion must occur on the IO thread.
scoped_ptr<DownloadTabInfo> tab_info_;
DownloadRequestCore core_;
DISALLOW_COPY_AND_ASSIGN(DownloadResourceHandler);
};
} // namespace content
#endif // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_RESOURCE_HANDLER_H_
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