chrome/browser/download/chrome_download_manager

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This source file includes following definitions.
verdict
SetVerdict
GetPlatformDownloadPath
CheckDownloadUrlDone
GetMimeTypeAndReplyOnUIThread
IsOpenInBrowserPreferreredForFile
weak_ptr_factory_
SetDownloadManager
Shutdown
GetDownloadIdReceiverCallback
SetNextId
GetNextId
ReturnNextId
DetermineDownloadTarget
ShouldOpenFileBasedOnExtension
DisableSafeBrowsing
IsDownloadReadyForCompletion
ShouldCompleteDownloadInternal
ShouldCompleteDownload
ShouldOpenDownload
GenerateFileHash
GetSaveDir
ChooseSavePath
OpenDownloadUsingPlatformHandler
OpenDownload
ShowDownloadInShell
CheckForFileExistence
ApplicationClientIdForFileScanning
GetDownloadProtectionService
NotifyExtensions
ReserveVirtualPath
PromptUserForDownloadPath
DetermineLocalPath
CheckDownloadUrl
GetFileMimeType
CheckClientDownloadDone
Observe
OnDownloadTargetDetermined
// 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.

#include "chrome/browser/download/chrome_download_manager_delegate.h"

#include <string>

#include "base/basictypes.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/callback.h"
#include "base/file_util.h"
#include "base/prefs/pref_member.h"
#include "base/prefs/pref_service.h"
#include "base/rand_util.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "base/task_runner.h"
#include "base/threading/sequenced_worker_pool.h"
#include "base/time/time.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/download/download_completion_blocker.h"
#include "chrome/browser/download/download_crx_util.h"
#include "chrome/browser/download/download_file_picker.h"
#include "chrome/browser/download/download_history.h"
#include "chrome/browser/download/download_item_model.h"
#include "chrome/browser/download/download_path_reservation_tracker.h"
#include "chrome/browser/download/download_prefs.h"
#include "chrome/browser/download/download_service.h"
#include "chrome/browser/download/download_service_factory.h"
#include "chrome/browser/download/download_stats.h"
#include "chrome/browser/download/download_target_determiner.h"
#include "chrome/browser/download/save_package_file_picker.h"
#include "chrome/browser/extensions/api/downloads/downloads_api.h"
#include "chrome/browser/extensions/crx_installer.h"
#include "chrome/browser/platform_util.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/safe_browsing/safe_browsing_service.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_finder.h"
#include "chrome/browser/ui/scoped_tabbed_browser_displayer.h"
#include "chrome/common/chrome_constants.h"
#include "chrome/common/pref_names.h"
#include "components/user_prefs/pref_registry_syncable.h"
#include "content/public/browser/download_item.h"
#include "content/public/browser/download_manager.h"
#include "content/public/browser/notification_source.h"
#include "content/public/browser/page_navigator.h"
#include "extensions/common/constants.h"
#include "net/base/mime_util.h"
#include "net/base/net_util.h"

#if defined(OS_CHROMEOS)
#include "chrome/browser/chromeos/drive/download_handler.h"
#include "chrome/browser/chromeos/drive/file_system_util.h"
#endif

using content::BrowserThread;
using content::DownloadItem;
using content::DownloadManager;
using safe_browsing::DownloadProtectionService;

namespace {

#if defined(FULL_SAFE_BROWSING)

// String pointer used for identifying safebrowing data associated with
// a download item.
const char kSafeBrowsingUserDataKey[] = "Safe Browsing ID";

// The state of a safebrowsing check.
class SafeBrowsingState : public DownloadCompletionBlocker {
 public:
  SafeBrowsingState()
    : verdict_(DownloadProtectionService::SAFE) {
  }

  virtual ~SafeBrowsingState();

  // The verdict that we got from calling CheckClientDownload. Only valid to
  // call if |is_complete()|.
  DownloadProtectionService::DownloadCheckResult verdict() const {
    return verdict_;
  }

  void SetVerdict(DownloadProtectionService::DownloadCheckResult result) {
    verdict_ = result;
    CompleteDownload();
  }

 private:
  DownloadProtectionService::DownloadCheckResult verdict_;

  DISALLOW_COPY_AND_ASSIGN(SafeBrowsingState);
};

SafeBrowsingState::~SafeBrowsingState() {}

#endif  // FULL_SAFE_BROWSING

// Used with GetPlatformDownloadPath() to indicate which platform path to
// return.
enum PlatformDownloadPathType {
  // Return the platform specific target path.
  PLATFORM_TARGET_PATH,

  // Return the platform specific current path. If the download is in-progress
  // and the download location is a local filesystem path, then
  // GetPlatformDownloadPath will return the path to the intermediate file.
  PLATFORM_CURRENT_PATH
};

// Returns a path in the form that that is expected by platform_util::OpenItem /
// platform_util::ShowItemInFolder / DownloadTargetDeterminer.
//
// DownloadItems corresponding to Drive downloads use a temporary file as the
// target path. The paths returned by DownloadItem::GetFullPath() /
// GetTargetFilePath() refer to this temporary file. This function looks up the
// corresponding path in Drive for these downloads.
//
// How the platform path is determined is based on PlatformDownloadPathType.
base::FilePath GetPlatformDownloadPath(Profile* profile,
                                       const DownloadItem* download,
                                       PlatformDownloadPathType path_type) {
#if defined(OS_CHROMEOS)
  // Drive downloads always return the target path for all types.
  drive::DownloadHandler* drive_download_handler =
      drive::DownloadHandler::GetForProfile(profile);
  if (drive_download_handler &&
      drive_download_handler->IsDriveDownload(download))
    return drive_download_handler->GetTargetPath(download);
#endif

  if (path_type == PLATFORM_TARGET_PATH)
    return download->GetTargetFilePath();
  return download->GetFullPath();
}

#if defined(FULL_SAFE_BROWSING)
// Callback invoked by DownloadProtectionService::CheckClientDownload.
// |is_content_check_supported| is true if the SB service supports scanning the
// download for malicious content.
// |callback| is invoked with a danger type determined as follows:
//
// Danger type is (in order of preference):
//   * DANGEROUS_URL, if the URL is a known malware site.
//   * MAYBE_DANGEROUS_CONTENT, if the content will be scanned for
//         malware. I.e. |is_content_check_supported| is true.
//   * NOT_DANGEROUS.
void CheckDownloadUrlDone(
    const DownloadTargetDeterminerDelegate::CheckDownloadUrlCallback& callback,
    bool is_content_check_supported,
    DownloadProtectionService::DownloadCheckResult result) {
  content::DownloadDangerType danger_type;
  if (result == DownloadProtectionService::SAFE) {
    // If this type of files is handled by the enhanced SafeBrowsing download
    // protection, mark it as potentially dangerous content until we are done
    // with scanning it.
    if (is_content_check_supported)
      danger_type = content::DOWNLOAD_DANGER_TYPE_MAYBE_DANGEROUS_CONTENT;
    else
      danger_type = content::DOWNLOAD_DANGER_TYPE_NOT_DANGEROUS;
  } else {
    // If the URL is malicious, we'll use that as the danger type. The results
    // of the content check, if one is performed, will be ignored.
    danger_type = content::DOWNLOAD_DANGER_TYPE_DANGEROUS_URL;
  }
  callback.Run(danger_type);
}

#endif  // FULL_SAFE_BROWSING

// Called on the blocking pool to determine the MIME type for |path|.
void GetMimeTypeAndReplyOnUIThread(
    const base::FilePath& path,
    const base::Callback<void(const std::string&)>& callback) {
  std::string mime_type;
  net::GetMimeTypeFromFile(path, &mime_type);
  BrowserThread::PostTask(
      BrowserThread::UI, FROM_HERE, base::Bind(callback, mime_type));
}

bool IsOpenInBrowserPreferreredForFile(const base::FilePath& path) {
  // On Android, always prefer opening with an external app. On ChromeOS, there
  // are no external apps so just allow all opens to be handled by the "System."
#if !defined(OS_ANDROID) && !defined(OS_CHROMEOS) && defined(ENABLE_PLUGINS)
  // TODO(asanka): Consider other file types and MIME types.
  // http://crbug.com/323561
  if (path.MatchesExtension(FILE_PATH_LITERAL(".pdf")) ||
      path.MatchesExtension(FILE_PATH_LITERAL(".htm")) ||
      path.MatchesExtension(FILE_PATH_LITERAL(".html")) ||
      path.MatchesExtension(FILE_PATH_LITERAL(".shtm")) ||
      path.MatchesExtension(FILE_PATH_LITERAL(".shtml")) ||
      path.MatchesExtension(FILE_PATH_LITERAL(".svg")) ||
      path.MatchesExtension(FILE_PATH_LITERAL(".xht")) ||
      path.MatchesExtension(FILE_PATH_LITERAL(".xhtm")) ||
      path.MatchesExtension(FILE_PATH_LITERAL(".xhtml")) ||
      path.MatchesExtension(FILE_PATH_LITERAL(".xml")) ||
      path.MatchesExtension(FILE_PATH_LITERAL(".xsl")) ||
      path.MatchesExtension(FILE_PATH_LITERAL(".xslt"))) {
    return true;
  }
#endif
  return false;
}

}  // namespace

ChromeDownloadManagerDelegate::ChromeDownloadManagerDelegate(Profile* profile)
    : profile_(profile),
      next_download_id_(content::DownloadItem::kInvalidId),
      download_prefs_(new DownloadPrefs(profile)),
      weak_ptr_factory_(this) {
}

ChromeDownloadManagerDelegate::~ChromeDownloadManagerDelegate() {
  // If a DownloadManager was set for this, Shutdown() must be called.
  DCHECK(!download_manager_);
}

void ChromeDownloadManagerDelegate::SetDownloadManager(DownloadManager* dm) {
  download_manager_ = dm;
}

void ChromeDownloadManagerDelegate::Shutdown() {
  download_prefs_.reset();
  weak_ptr_factory_.InvalidateWeakPtrs();
  download_manager_ = NULL;
}

content::DownloadIdCallback
ChromeDownloadManagerDelegate::GetDownloadIdReceiverCallback() {
  return base::Bind(&ChromeDownloadManagerDelegate::SetNextId,
                    weak_ptr_factory_.GetWeakPtr());
}

void ChromeDownloadManagerDelegate::SetNextId(uint32 next_id) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!profile_->IsOffTheRecord());
  DCHECK_NE(content::DownloadItem::kInvalidId, next_id);
  next_download_id_ = next_id;

  IdCallbackVector callbacks;
  id_callbacks_.swap(callbacks);
  for (IdCallbackVector::const_iterator it = callbacks.begin();
       it != callbacks.end(); ++it) {
    ReturnNextId(*it);
  }
}

void ChromeDownloadManagerDelegate::GetNextId(
    const content::DownloadIdCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  if (profile_->IsOffTheRecord()) {
    content::BrowserContext::GetDownloadManager(
        profile_->GetOriginalProfile())->GetDelegate()->GetNextId(callback);
    return;
  }
  if (next_download_id_ == content::DownloadItem::kInvalidId) {
    id_callbacks_.push_back(callback);
    return;
  }
  ReturnNextId(callback);
}

void ChromeDownloadManagerDelegate::ReturnNextId(
    const content::DownloadIdCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!profile_->IsOffTheRecord());
  DCHECK_NE(content::DownloadItem::kInvalidId, next_download_id_);
  callback.Run(next_download_id_++);
}

bool ChromeDownloadManagerDelegate::DetermineDownloadTarget(
    DownloadItem* download,
    const content::DownloadTargetCallback& callback) {
  DownloadTargetDeterminer::CompletionCallback target_determined_callback =
      base::Bind(&ChromeDownloadManagerDelegate::OnDownloadTargetDetermined,
                 weak_ptr_factory_.GetWeakPtr(),
                 download->GetId(),
                 callback);
  DownloadTargetDeterminer::Start(
      download,
      GetPlatformDownloadPath(profile_, download, PLATFORM_TARGET_PATH),
      download_prefs_.get(),
      this,
      target_determined_callback);
  return true;
}

bool ChromeDownloadManagerDelegate::ShouldOpenFileBasedOnExtension(
    const base::FilePath& path) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  if (path.Extension().empty())
    return false;
  // TODO(asanka): This determination is done based on |path|, while
  // ShouldOpenDownload() detects extension downloads based on the
  // characteristics of the download. Reconcile this. http://crbug.com/167702
  if (path.MatchesExtension(extensions::kExtensionFileExtension))
    return false;
  return download_prefs_->IsAutoOpenEnabledBasedOnExtension(path);
}

// static
void ChromeDownloadManagerDelegate::DisableSafeBrowsing(DownloadItem* item) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
#if defined(FULL_SAFE_BROWSING)
  SafeBrowsingState* state = static_cast<SafeBrowsingState*>(
      item->GetUserData(&kSafeBrowsingUserDataKey));
  if (!state) {
    state = new SafeBrowsingState();
    item->SetUserData(&kSafeBrowsingUserDataKey, state);
  }
  state->SetVerdict(DownloadProtectionService::SAFE);
#endif
}

bool ChromeDownloadManagerDelegate::IsDownloadReadyForCompletion(
    DownloadItem* item,
    const base::Closure& internal_complete_callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
#if defined(FULL_SAFE_BROWSING)
  SafeBrowsingState* state = static_cast<SafeBrowsingState*>(
      item->GetUserData(&kSafeBrowsingUserDataKey));
  if (!state) {
    // Begin the safe browsing download protection check.
    DownloadProtectionService* service = GetDownloadProtectionService();
    if (service) {
      VLOG(2) << __FUNCTION__ << "() Start SB download check for download = "
              << item->DebugString(false);
      state = new SafeBrowsingState();
      state->set_callback(internal_complete_callback);
      item->SetUserData(&kSafeBrowsingUserDataKey, state);
      service->CheckClientDownload(
          item,
          base::Bind(
              &ChromeDownloadManagerDelegate::CheckClientDownloadDone,
              weak_ptr_factory_.GetWeakPtr(),
              item->GetId()));
      return false;
    }
  } else if (!state->is_complete()) {
    // Don't complete the download until we have an answer.
    state->set_callback(internal_complete_callback);
    return false;
  }
#endif
  return true;
}

void ChromeDownloadManagerDelegate::ShouldCompleteDownloadInternal(
    uint32 download_id,
    const base::Closure& user_complete_callback) {
  DownloadItem* item = download_manager_->GetDownload(download_id);
  if (!item)
    return;
  if (ShouldCompleteDownload(item, user_complete_callback))
    user_complete_callback.Run();
}

bool ChromeDownloadManagerDelegate::ShouldCompleteDownload(
    DownloadItem* item,
    const base::Closure& user_complete_callback) {
  return IsDownloadReadyForCompletion(item, base::Bind(
      &ChromeDownloadManagerDelegate::ShouldCompleteDownloadInternal,
      weak_ptr_factory_.GetWeakPtr(), item->GetId(), user_complete_callback));
}

bool ChromeDownloadManagerDelegate::ShouldOpenDownload(
    DownloadItem* item, const content::DownloadOpenDelayedCallback& callback) {
  if (download_crx_util::IsExtensionDownload(*item)) {
    scoped_refptr<extensions::CrxInstaller> crx_installer =
        download_crx_util::OpenChromeExtension(profile_, *item);

    // CRX_INSTALLER_DONE will fire when the install completes.  At that
    // time, Observe() will call the passed callback.
    registrar_.Add(
        this,
        chrome::NOTIFICATION_CRX_INSTALLER_DONE,
        content::Source<extensions::CrxInstaller>(crx_installer.get()));

    crx_installers_[crx_installer.get()] = callback;
    // The status text and percent complete indicator will change now
    // that we are installing a CRX.  Update observers so that they pick
    // up the change.
    item->UpdateObservers();
    return false;
  }

  return true;
}

bool ChromeDownloadManagerDelegate::GenerateFileHash() {
#if defined(FULL_SAFE_BROWSING)
  return profile_->GetPrefs()->GetBoolean(prefs::kSafeBrowsingEnabled) &&
      g_browser_process->safe_browsing_service()->DownloadBinHashNeeded();
#else
  return false;
#endif
}

void ChromeDownloadManagerDelegate::GetSaveDir(
    content::BrowserContext* browser_context,
    base::FilePath* website_save_dir,
    base::FilePath* download_save_dir,
    bool* skip_dir_check) {
  *website_save_dir = download_prefs_->SaveFilePath();
  DCHECK(!website_save_dir->empty());
  *download_save_dir = download_prefs_->DownloadPath();
  *skip_dir_check = false;
#if defined(OS_CHROMEOS)
  *skip_dir_check = drive::util::IsUnderDriveMountPoint(*website_save_dir);
#endif
}

void ChromeDownloadManagerDelegate::ChooseSavePath(
    content::WebContents* web_contents,
    const base::FilePath& suggested_path,
    const base::FilePath::StringType& default_extension,
    bool can_save_as_complete,
    const content::SavePackagePathPickedCallback& callback) {
  // Deletes itself.
  new SavePackageFilePicker(
      web_contents,
      suggested_path,
      default_extension,
      can_save_as_complete,
      download_prefs_.get(),
      callback);
}

void ChromeDownloadManagerDelegate::OpenDownloadUsingPlatformHandler(
    DownloadItem* download) {
  base::FilePath platform_path(
      GetPlatformDownloadPath(profile_, download, PLATFORM_TARGET_PATH));
  DCHECK(!platform_path.empty());
  platform_util::OpenItem(profile_, platform_path);
}

void ChromeDownloadManagerDelegate::OpenDownload(DownloadItem* download) {
  DCHECK_EQ(DownloadItem::COMPLETE, download->GetState());
  DCHECK(!download->GetTargetFilePath().empty());
  if (!download->CanOpenDownload())
    return;

  if (!DownloadItemModel(download).ShouldPreferOpeningInBrowser()) {
    RecordDownloadOpenMethod(DOWNLOAD_OPEN_METHOD_DEFAULT_PLATFORM);
    OpenDownloadUsingPlatformHandler(download);
    return;
  }

#if !defined(OS_ANDROID)
  content::WebContents* web_contents = download->GetWebContents();
  Browser* browser =
      web_contents ? chrome::FindBrowserWithWebContents(web_contents) : NULL;
  scoped_ptr<chrome::ScopedTabbedBrowserDisplayer> browser_displayer;
  if (!browser ||
      !browser->CanSupportWindowFeature(Browser::FEATURE_TABSTRIP)) {
    browser_displayer.reset(new chrome::ScopedTabbedBrowserDisplayer(
        profile_, chrome::GetActiveDesktop()));
    browser = browser_displayer->browser();
  }
  content::OpenURLParams params(
      net::FilePathToFileURL(download->GetTargetFilePath()),
      content::Referrer(),
      NEW_FOREGROUND_TAB,
      content::PAGE_TRANSITION_LINK,
      false);
  browser->OpenURL(params);
  RecordDownloadOpenMethod(DOWNLOAD_OPEN_METHOD_DEFAULT_BROWSER);
#else
  // ShouldPreferOpeningInBrowser() should never be true on Android.
  NOTREACHED();
#endif
}

void ChromeDownloadManagerDelegate::ShowDownloadInShell(
    DownloadItem* download) {
  if (!download->CanShowInFolder())
    return;
  base::FilePath platform_path(
      GetPlatformDownloadPath(profile_, download, PLATFORM_CURRENT_PATH));
  DCHECK(!platform_path.empty());
  platform_util::ShowItemInFolder(profile_, platform_path);
}

void ChromeDownloadManagerDelegate::CheckForFileExistence(
    DownloadItem* download,
    const content::CheckForFileExistenceCallback& callback) {
#if defined(OS_CHROMEOS)
  drive::DownloadHandler* drive_download_handler =
      drive::DownloadHandler::GetForProfile(profile_);
  if (drive_download_handler &&
      drive_download_handler->IsDriveDownload(download)) {
    drive_download_handler->CheckForFileExistence(download, callback);
    return;
  }
#endif
  static const char kSequenceToken[] = "ChromeDMD-FileExistenceChecker";
  base::SequencedWorkerPool* worker_pool = BrowserThread::GetBlockingPool();
  scoped_refptr<base::SequencedTaskRunner> task_runner =
      worker_pool->GetSequencedTaskRunnerWithShutdownBehavior(
          worker_pool->GetNamedSequenceToken(kSequenceToken),
          base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);
  base::PostTaskAndReplyWithResult(
      task_runner.get(),
      FROM_HERE,
      base::Bind(&base::PathExists, download->GetTargetFilePath()),
      callback);
}

std::string
ChromeDownloadManagerDelegate::ApplicationClientIdForFileScanning() const {
  return std::string(chrome::kApplicationClientIDStringForAVScanning);
}

DownloadProtectionService*
    ChromeDownloadManagerDelegate::GetDownloadProtectionService() {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
#if defined(FULL_SAFE_BROWSING)
  SafeBrowsingService* sb_service = g_browser_process->safe_browsing_service();
  if (sb_service && sb_service->download_protection_service() &&
      profile_->GetPrefs()->GetBoolean(prefs::kSafeBrowsingEnabled)) {
    return sb_service->download_protection_service();
  }
#endif
  return NULL;
}

void ChromeDownloadManagerDelegate::NotifyExtensions(
    DownloadItem* download,
    const base::FilePath& virtual_path,
    const NotifyExtensionsCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
#if !defined(OS_ANDROID)
  ExtensionDownloadsEventRouter* router =
      DownloadServiceFactory::GetForBrowserContext(profile_)->
      GetExtensionEventRouter();
  if (router) {
    base::Closure original_path_callback =
        base::Bind(callback, base::FilePath(),
                   DownloadPathReservationTracker::UNIQUIFY);
    router->OnDeterminingFilename(download, virtual_path.BaseName(),
                                  original_path_callback,
                                  callback);
    return;
  }
#endif
  callback.Run(base::FilePath(), DownloadPathReservationTracker::UNIQUIFY);
}

void ChromeDownloadManagerDelegate::ReserveVirtualPath(
    content::DownloadItem* download,
    const base::FilePath& virtual_path,
    bool create_directory,
    DownloadPathReservationTracker::FilenameConflictAction conflict_action,
    const DownloadTargetDeterminerDelegate::ReservedPathCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!virtual_path.empty());
#if defined(OS_CHROMEOS)
  // TODO(asanka): Handle path reservations for virtual paths as well.
  //               http://crbug.com/151618
  if (drive::util::IsUnderDriveMountPoint(virtual_path)) {
    callback.Run(virtual_path, true);
    return;
  }
#endif
  DownloadPathReservationTracker::GetReservedPath(
      download,
      virtual_path,
      download_prefs_->DownloadPath(),
      create_directory,
      conflict_action,
      callback);
}

void ChromeDownloadManagerDelegate::PromptUserForDownloadPath(
    DownloadItem* download,
    const base::FilePath& suggested_path,
    const DownloadTargetDeterminerDelegate::FileSelectedCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DownloadFilePicker::ShowFilePicker(download, suggested_path, callback);
}

void ChromeDownloadManagerDelegate::DetermineLocalPath(
    DownloadItem* download,
    const base::FilePath& virtual_path,
    const DownloadTargetDeterminerDelegate::LocalPathCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
#if defined(OS_CHROMEOS)
  drive::DownloadHandler* drive_download_handler =
      drive::DownloadHandler::GetForProfile(profile_);
  if (drive_download_handler) {
    drive_download_handler->SubstituteDriveDownloadPath(
        virtual_path, download, callback);
    return;
  }
#endif
  callback.Run(virtual_path);
}

void ChromeDownloadManagerDelegate::CheckDownloadUrl(
    DownloadItem* download,
    const base::FilePath& suggested_path,
    const CheckDownloadUrlCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));

#if defined(FULL_SAFE_BROWSING)
  safe_browsing::DownloadProtectionService* service =
      GetDownloadProtectionService();
  if (service) {
    bool is_content_check_supported =
        service->IsSupportedDownload(*download, suggested_path);
    VLOG(2) << __FUNCTION__ << "() Start SB URL check for download = "
            << download->DebugString(false);
    service->CheckDownloadUrl(*download,
                              base::Bind(&CheckDownloadUrlDone,
                                         callback,
                                         is_content_check_supported));
    return;
  }
#endif
  callback.Run(content::DOWNLOAD_DANGER_TYPE_NOT_DANGEROUS);
}

void ChromeDownloadManagerDelegate::GetFileMimeType(
    const base::FilePath& path,
    const GetFileMimeTypeCallback& callback) {
  BrowserThread::PostBlockingPoolTask(
      FROM_HERE,
      base::Bind(&GetMimeTypeAndReplyOnUIThread, path, callback));
}

#if defined(FULL_SAFE_BROWSING)
void ChromeDownloadManagerDelegate::CheckClientDownloadDone(
    uint32 download_id,
    DownloadProtectionService::DownloadCheckResult result) {
  DownloadItem* item = download_manager_->GetDownload(download_id);
  if (!item || (item->GetState() != DownloadItem::IN_PROGRESS))
    return;

  VLOG(2) << __FUNCTION__ << "() download = " << item->DebugString(false)
          << " verdict = " << result;
  // We only mark the content as being dangerous if the download's safety state
  // has not been set to DANGEROUS yet.  We don't want to show two warnings.
  if (item->GetDangerType() == content::DOWNLOAD_DANGER_TYPE_NOT_DANGEROUS ||
      item->GetDangerType() ==
      content::DOWNLOAD_DANGER_TYPE_MAYBE_DANGEROUS_CONTENT) {
    content::DownloadDangerType danger_type =
        content::DOWNLOAD_DANGER_TYPE_NOT_DANGEROUS;
    switch (result) {
      case DownloadProtectionService::SAFE:
        // Do nothing.
        break;
      case DownloadProtectionService::DANGEROUS:
        danger_type = content::DOWNLOAD_DANGER_TYPE_DANGEROUS_CONTENT;
        break;
      case DownloadProtectionService::UNCOMMON:
        danger_type = content::DOWNLOAD_DANGER_TYPE_UNCOMMON_CONTENT;
        break;
      case DownloadProtectionService::DANGEROUS_HOST:
        danger_type = content::DOWNLOAD_DANGER_TYPE_DANGEROUS_HOST;
        break;
      case DownloadProtectionService::POTENTIALLY_UNWANTED:
        danger_type = content::DOWNLOAD_DANGER_TYPE_POTENTIALLY_UNWANTED;
        break;
    }

    if (danger_type != content::DOWNLOAD_DANGER_TYPE_NOT_DANGEROUS)
      item->OnContentCheckCompleted(danger_type);
  }

  SafeBrowsingState* state = static_cast<SafeBrowsingState*>(
      item->GetUserData(&kSafeBrowsingUserDataKey));
  state->SetVerdict(result);
}
#endif  // FULL_SAFE_BROWSING

// content::NotificationObserver implementation.
void ChromeDownloadManagerDelegate::Observe(
    int type,
    const content::NotificationSource& source,
    const content::NotificationDetails& details) {
  DCHECK(type == chrome::NOTIFICATION_CRX_INSTALLER_DONE);

  registrar_.Remove(this,
                    chrome::NOTIFICATION_CRX_INSTALLER_DONE,
                    source);

  scoped_refptr<extensions::CrxInstaller> installer =
      content::Source<extensions::CrxInstaller>(source).ptr();
  content::DownloadOpenDelayedCallback callback =
      crx_installers_[installer.get()];
  crx_installers_.erase(installer.get());
  callback.Run(installer->did_handle_successfully());
}

void ChromeDownloadManagerDelegate::OnDownloadTargetDetermined(
    int32 download_id,
    const content::DownloadTargetCallback& callback,
    scoped_ptr<DownloadTargetInfo> target_info) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DownloadItem* item = download_manager_->GetDownload(download_id);
  if (!target_info->target_path.empty() && item &&
      IsOpenInBrowserPreferreredForFile(target_info->target_path) &&
      target_info->is_filetype_handled_safely)
    DownloadItemModel(item).SetShouldPreferOpeningInBrowser(true);
  callback.Run(target_info->target_path,
               target_info->target_disposition,
               target_info->danger_type,
               target_info->intermediate_path);
}
/* [<][>][^][v][top][bottom][index][help] */
root/chrome/browser/download/chrome_download_manager_delegate.cc

DEFINITIONS
