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// Copyright (c) 2011 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 CHROME_BROWSER_RENDERER_HOST_DOWNLOAD_RESOURCE_HANDLER_H_
#define CHROME_BROWSER_RENDERER_HOST_DOWNLOAD_RESOURCE_HANDLER_H_
#pragma once
#include <string>
#include "base/timer.h"
#include "chrome/browser/download/download_file.h"
#include "chrome/browser/renderer_host/global_request_id.h"
#include "chrome/browser/renderer_host/resource_handler.h"
#include "chrome/browser/safe_browsing/safe_browsing_service.h"
class DownloadFileManager;
class ResourceDispatcherHost;
struct DownloadBuffer;
namespace net {
class URLRequest;
} // namespace net
// Forwards data to the download thread.
class DownloadResourceHandler : public ResourceHandler,
public SafeBrowsingService::Client {
public:
DownloadResourceHandler(ResourceDispatcherHost* rdh,
int render_process_host_id,
int render_view_id,
int request_id,
const GURL& url,
DownloadFileManager* download_file_manager,
net::URLRequest* request,
bool save_as,
const DownloadSaveInfo& save_info);
virtual bool OnUploadProgress(int request_id, uint64 position, uint64 size);
// Not needed, as this event handler ought to be the final resource.
virtual bool OnRequestRedirected(int request_id, const GURL& url,
ResourceResponse* response, bool* defer);
// Send the download creation information to the download thread.
virtual bool OnResponseStarted(int request_id, ResourceResponse* response);
// Pass-through implementation.
virtual bool OnWillStart(int request_id, const GURL& url, bool* defer);
// Create a new buffer, which will be handed to the download thread for file
// writing and deletion.
virtual bool OnWillRead(int request_id, net::IOBuffer** buf, int* buf_size,
int min_size);
virtual bool OnReadCompleted(int request_id, int* bytes_read);
virtual bool OnResponseCompleted(int request_id,
const net::URLRequestStatus& status,
const std::string& security_info);
virtual void OnRequestClosed();
// If the content-length header is not present (or contains something other
// than numbers), the incoming content_length is -1 (unknown size).
// Set the content length to 0 to indicate unknown size to DownloadManager.
void set_content_length(const int64& content_length);
void set_content_disposition(const std::string& content_disposition);
void CheckWriteProgress();
std::string DebugString() const;
private:
// Enumerate for histogramming purposes. DO NOT CHANGE THE
// ORDERING OF THESE VALUES.
enum SBStatsType {
DOWNLOAD_URL_CHECKS_TOTAL,
DOWNLOAD_URL_CHECKS_CANCELED,
DOWNLOAD_URL_CHECKS_MALWARE,
// Memory space for histograms is determined by the max. ALWAYS
// ADD NEW VALUES BEFORE THIS ONE.
DOWNLOAD_URL_CHECKS_MAX
};
~DownloadResourceHandler();
void StartPauseTimer();
void StartDownloadUrlCheck();
// Called when the result of checking a download URL is known.
virtual void OnDownloadUrlCheckResult(
const GURL& url,
SafeBrowsingService::UrlCheckResult result);
// A helper function that updates UMA for download url checks.
static void UpdateDownloadUrlCheckStats(SBStatsType stat_type);
int download_id_;
GlobalRequestID global_id_;
int render_view_id_;
scoped_refptr<net::IOBuffer> read_buffer_;
std::string content_disposition_;
GURL url_; // final URL from which we're downloading.
GURL original_url_; // original URL before any redirection by the server.
int64 content_length_;
DownloadFileManager* download_file_manager_;
net::URLRequest* request_;
bool save_as_; // Request was initiated via "Save As" by the user.
DownloadSaveInfo save_info_;
DownloadBuffer* buffer_;
ResourceDispatcherHost* rdh_;
bool is_paused_;
base::OneShotTimer<DownloadResourceHandler> pause_timer_;
bool url_check_pending_;
base::TimeTicks download_start_time_; // used to collect stats.
static const int kReadBufSize = 32768; // bytes
static const size_t kLoadsToWrite = 100; // number of data buffers queued
static const int kThrottleTimeMs = 200; // milliseconds
DISALLOW_COPY_AND_ASSIGN(DownloadResourceHandler);
};
#endif // CHROME_BROWSER_RENDERER_HOST_DOWNLOAD_RESOURCE_HANDLER_H_
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