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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_DOWNLOAD_DOWNLOAD_SAFE_BROWSING_CLIENT_H_
#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SAFE_BROWSING_CLIENT_H_
#pragma once
#include "base/callback.h"
#include "base/ref_counted.h"
#include "base/time.h"
#include "chrome/browser/safe_browsing/safe_browsing_service.h"
struct DownloadCreateInfo;
// This is a helper class used by DownloadManager to check a download URL with
// SafeBrowsingService. The client is refcounted and will be released once
// there is no reference to it.
// Usage:
// {
// scoped_refptr<DownloadSBClient> client_ = new DownloadSBClient(...);
// client_->CheckDownloadUrl(NewCallback(this, &DownloadManager::CallBack));
// }
// DownloadManager::CallBack(...) {
// // After this, the |client_| is gone.
// }
class DownloadSBClient
: public SafeBrowsingService::Client,
public base::RefCountedThreadSafe<DownloadSBClient> {
public:
typedef Callback2<DownloadCreateInfo*, bool>::Type DoneCallback;
explicit DownloadSBClient(DownloadCreateInfo* info);
// Note: This method can only be called once per DownloadSBClient instance.
void CheckDownloadUrl(DoneCallback* callback);
protected:
// Call SafeBrowsingService on IO thread to verify the download URL.
void CheckDownloadUrlOnIOThread();
// The callback interface for SafeBrowsingService::Client.
// Called when the result of checking a download URL is known.
virtual void OnDownloadUrlCheckResult(
const GURL& url, SafeBrowsingService::UrlCheckResult result);
private:
// Enumerate for histogramming purposes.
// DO NOT CHANGE THE ORDERING OF THESE VALUES (different histogram data will
// be mixed together based on their 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
};
friend class base::RefCountedThreadSafe<DownloadSBClient>;
virtual ~DownloadSBClient();
// Call DownloadManager on UI thread.
void SafeBrowsingCheckUrlDone(SafeBrowsingService::UrlCheckResult result);
// Update the UMA stats.
void UpdateDownloadUrlCheckStats(SBStatsType stat_type);
scoped_ptr<DoneCallback> done_callback_;
// Not owned by this class.
DownloadCreateInfo* info_;
scoped_refptr<SafeBrowsingService> sb_service_;
// When a safebrowsing URL check starts, for stats purpose.
base::TimeTicks start_time_;
DISALLOW_COPY_AND_ASSIGN(DownloadSBClient);
};
#endif // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SAFE_BROWSING_CLIENT_H_
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