chrome/browser/chromeos/customization_wallpaper_downloader.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/chromeos/customization_wallpaper_downloader.h"
   6
   7 #include <math.h>
   8 #include <algorithm>
   9
  10 #include "base/file_util.h"
  11 #include "content/public/browser/browser_thread.h"
  12 #include "net/base/load_flags.h"
  13 #include "net/http/http_status_code.h"
  14 #include "net/url_request/url_fetcher.h"
  15 #include "net/url_request/url_request_context_getter.h"
  16 #include "url/gurl.h"
  17
  18 namespace chromeos {
  19 namespace {
  20 // This is temporary file suffix (for downloading or resizing).
  21 const char kTemporarySuffix[] = ".tmp";
  22
  23 // Sleep between wallpaper retries (used multiplied by squared retry number).
  24 const unsigned kRetrySleepSeconds = 10;
  25
  26 // Retry is infinite with increasing intervals. When calculated delay becomes
  27 // longer than maximum (kMaxRetrySleepSeconds) it is set to the maximum.
  28 const double kMaxRetrySleepSeconds = 6 * 3600;  // 6 hours
  29
  30 void CreateWallpaperDirectory(const base::FilePath& wallpaper_dir,
  31                               bool* success) {
  32   DCHECK(content::BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
  33   DCHECK(success);
  34
  35   *success = CreateDirectoryAndGetError(wallpaper_dir, NULL);
  36   if (!*success) {
  37     NOTREACHED() << "Failed to create directory '" << wallpaper_dir.value()
  38                  << "'";
  39   }
  40 }
  41
  42 void RenameTemporaryFile(const base::FilePath& from,
  43                          const base::FilePath& to,
  44                          bool* success) {
  45   DCHECK(content::BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
  46   DCHECK(success);
  47
  48   base::File::Error error;
  49   if (base::ReplaceFile(from, to, &error)) {
  50     *success = true;
  51   } else {
  52     LOG(WARNING)
  53         << "Failed to rename temporary file of Customized Wallpaper. error="
  54         << error;
  55     *success = false;
  56   }
  57 }
  58
  59 }  // namespace
  60
  61 CustomizationWallpaperDownloader::CustomizationWallpaperDownloader(
  62     net::URLRequestContextGetter* url_context_getter,
  63     const GURL& wallpaper_url,
  64     const base::FilePath& wallpaper_dir,
  65     const base::FilePath& wallpaper_downloaded_file,
  66     base::Callback<void(bool success, const GURL&)>
  67         on_wallpaper_fetch_completed)
  68     : url_context_getter_(url_context_getter),
  69       wallpaper_url_(wallpaper_url),
  70       wallpaper_dir_(wallpaper_dir),
  71       wallpaper_downloaded_file_(wallpaper_downloaded_file),
  72       wallpaper_temporary_file_(wallpaper_downloaded_file.value() +
  73                                 kTemporarySuffix),
  74       retries_(0),
  75       retry_delay_(base::TimeDelta::FromSeconds(kRetrySleepSeconds)),
  76       on_wallpaper_fetch_completed_(on_wallpaper_fetch_completed),
  77       weak_factory_(this) {
  78   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  79 }
  80
  81 CustomizationWallpaperDownloader::~CustomizationWallpaperDownloader() {
  82   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  83 }
  84
  85 void CustomizationWallpaperDownloader::StartRequest() {
  86   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  87   DCHECK(wallpaper_url_.is_valid());
  88
  89   url_fetcher_.reset(
  90       net::URLFetcher::Create(wallpaper_url_, net::URLFetcher::GET, this));
  91   url_fetcher_->SetRequestContext(url_context_getter_);
  92   url_fetcher_->SetLoadFlags(net::LOAD_BYPASS_CACHE |
  93                              net::LOAD_DISABLE_CACHE |
  94                              net::LOAD_DO_NOT_SAVE_COOKIES |
  95                              net::LOAD_DO_NOT_SEND_COOKIES |
  96                              net::LOAD_DO_NOT_SEND_AUTH_DATA);
  97   base::SequencedWorkerPool* blocking_pool =
  98       content::BrowserThread::GetBlockingPool();
  99   url_fetcher_->SaveResponseToFileAtPath(
 100       wallpaper_temporary_file_,
 101       blocking_pool->GetSequencedTaskRunner(blocking_pool->GetSequenceToken()));
 102   url_fetcher_->Start();
 103 }
 104
 105 void CustomizationWallpaperDownloader::Retry() {
 106   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 107   ++retries_;
 108
 109   const double delay_seconds = std::min(
 110       kMaxRetrySleepSeconds,
 111       static_cast<double>(retries_) * retries_ * retry_delay_.InSecondsF());
 112   const base::TimeDelta delay = base::TimeDelta::FromSecondsD(delay_seconds);
 113
 114   VLOG(1) << "Schedule Customized Wallpaper download in " << delay.InSecondsF()
 115           << " seconds (retry = " << retries_ << ").";
 116   retry_current_delay_ = delay;
 117   request_scheduled_.Start(
 118       FROM_HERE, delay, this, &CustomizationWallpaperDownloader::StartRequest);
 119 }
 120
 121 void CustomizationWallpaperDownloader::Start() {
 122   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 123   scoped_ptr<bool> success(new bool(false));
 124
 125   base::Closure mkdir_closure = base::Bind(&CreateWallpaperDirectory,
 126                                            wallpaper_dir_,
 127                                            base::Unretained(success.get()));
 128   base::Closure on_created_closure =
 129       base::Bind(&CustomizationWallpaperDownloader::OnWallpaperDirectoryCreated,
 130                  weak_factory_.GetWeakPtr(),
 131                  base::Passed(success.Pass()));
 132   if (!content::BrowserThread::PostBlockingPoolTaskAndReply(
 133           FROM_HERE, mkdir_closure, on_created_closure)) {
 134     LOG(WARNING) << "Failed to start Customized Wallpaper download.";
 135   }
 136 }
 137
 138 void CustomizationWallpaperDownloader::OnWallpaperDirectoryCreated(
 139     scoped_ptr<bool> success) {
 140   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 141   if (*success)
 142     StartRequest();
 143 }
 144
 145 void CustomizationWallpaperDownloader::OnURLFetchComplete(
 146     const net::URLFetcher* source) {
 147   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 148   DCHECK_EQ(url_fetcher_.get(), source);
 149
 150   const net::URLRequestStatus status = source->GetStatus();
 151   const int response_code = source->GetResponseCode();
 152
 153   const bool server_error =
 154       !status.is_success() ||
 155       (response_code >= net::HTTP_INTERNAL_SERVER_ERROR &&
 156        response_code < (net::HTTP_INTERNAL_SERVER_ERROR + 100));
 157
 158   VLOG(1) << "CustomizationWallpaperDownloader::OnURLFetchComplete(): status="
 159           << status.status();
 160
 161   if (server_error) {
 162     url_fetcher_.reset();
 163     Retry();
 164     return;
 165   }
 166
 167   base::FilePath response_path;
 168   url_fetcher_->GetResponseAsFilePath(true, &response_path);
 169   url_fetcher_.reset();
 170
 171   scoped_ptr<bool> success(new bool(false));
 172
 173   base::Closure rename_closure = base::Bind(&RenameTemporaryFile,
 174                                             response_path,
 175                                             wallpaper_downloaded_file_,
 176                                             base::Unretained(success.get()));
 177   base::Closure on_rename_closure =
 178       base::Bind(&CustomizationWallpaperDownloader::OnTemporaryFileRenamed,
 179                  weak_factory_.GetWeakPtr(),
 180                  base::Passed(success.Pass()));
 181   if (!content::BrowserThread::PostBlockingPoolTaskAndReply(
 182           FROM_HERE, rename_closure, on_rename_closure)) {
 183     LOG(WARNING)
 184         << "Failed to start Customized Wallpaper Rename DownloadedFile.";
 185     on_wallpaper_fetch_completed_.Run(false, wallpaper_url_);
 186   }
 187 }
 188
 189 void CustomizationWallpaperDownloader::OnTemporaryFileRenamed(
 190     scoped_ptr<bool> success) {
 191   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 192   on_wallpaper_fetch_completed_.Run(*success, wallpaper_url_);
 193 }
 194
 195 }  //   namespace chromeos