chrome/browser/extensions/api/image_writer_private/write_from_url_operation.cc

   1 // Copyright 2013 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 "base/files/file_util.h"
   6 #include "chrome/browser/extensions/api/image_writer_private/error_messages.h"
   7 #include "chrome/browser/extensions/api/image_writer_private/operation_manager.h"
   8 #include "chrome/browser/extensions/api/image_writer_private/write_from_url_operation.h"
   9 #include "content/public/browser/browser_thread.h"
  10 #include "net/url_request/url_fetcher.h"
  11
  12 namespace extensions {
  13 namespace image_writer {
  14
  15 using content::BrowserThread;
  16
  17 WriteFromUrlOperation::WriteFromUrlOperation(
  18     base::WeakPtr<OperationManager> manager,
  19     const ExtensionId& extension_id,
  20     net::URLRequestContextGetter* request_context,
  21     GURL url,
  22     const std::string& hash,
  23     const std::string& device_path)
  24     : Operation(manager, extension_id, device_path),
  25       request_context_(request_context),
  26       url_(url),
  27       hash_(hash),
  28       download_continuation_() {}
  29
  30 WriteFromUrlOperation::~WriteFromUrlOperation() {
  31 }
  32
  33 void WriteFromUrlOperation::StartImpl() {
  34   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
  35
  36   GetDownloadTarget(base::Bind(
  37       &WriteFromUrlOperation::Download,
  38       this,
  39       base::Bind(
  40           &WriteFromUrlOperation::VerifyDownload,
  41           this,
  42           base::Bind(
  43               &WriteFromUrlOperation::Unzip,
  44               this,
  45               base::Bind(&WriteFromUrlOperation::Write,
  46                          this,
  47                          base::Bind(&WriteFromUrlOperation::VerifyWrite,
  48                                     this,
  49                                     base::Bind(&WriteFromUrlOperation::Finish,
  50                                                this)))))));
  51 }
  52
  53 void WriteFromUrlOperation::GetDownloadTarget(
  54     const base::Closure& continuation) {
  55   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
  56   if (IsCancelled()) {
  57     return;
  58   }
  59
  60   if (url_.ExtractFileName().empty()) {
  61     if (!base::CreateTemporaryFileInDir(temp_dir_.path(), &image_path_)) {
  62       Error(error::kTempFileError);
  63       return;
  64     }
  65   } else {
  66     base::FilePath file_name =
  67         base::FilePath::FromUTF8Unsafe(url_.ExtractFileName());
  68     image_path_ = temp_dir_.path().Append(file_name);
  69   }
  70
  71   BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE, continuation);
  72 }
  73
  74 void WriteFromUrlOperation::Download(const base::Closure& continuation) {
  75   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
  76
  77   if (IsCancelled()) {
  78     return;
  79   }
  80
  81   download_continuation_ = continuation;
  82
  83   SetStage(image_writer_api::STAGE_DOWNLOAD);
  84
  85   // Store the URL fetcher on this object so that it is destroyed before this
  86   // object is.
  87   url_fetcher_ = net::URLFetcher::Create(url_, net::URLFetcher::GET, this);
  88
  89   url_fetcher_->SetRequestContext(request_context_);
  90   url_fetcher_->SaveResponseToFileAtPath(
  91       image_path_,
  92       BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE));
  93
  94   AddCleanUpFunction(
  95       base::Bind(&WriteFromUrlOperation::DestroyUrlFetcher, this));
  96
  97   url_fetcher_->Start();
  98 }
  99
 100 void WriteFromUrlOperation::DestroyUrlFetcher() { url_fetcher_.reset(); }
 101
 102 void WriteFromUrlOperation::OnURLFetchUploadProgress(
 103     const net::URLFetcher* source,
 104     int64 current,
 105     int64 total) {
 106   // No-op
 107 }
 108
 109 void WriteFromUrlOperation::OnURLFetchDownloadProgress(
 110     const net::URLFetcher* source,
 111     int64 current,
 112     int64 total) {
 113   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
 114
 115   if (IsCancelled()) {
 116     url_fetcher_.reset(NULL);
 117   }
 118
 119   int progress = (kProgressComplete * current) / total;
 120
 121   SetProgress(progress);
 122 }
 123
 124 void WriteFromUrlOperation::OnURLFetchComplete(const net::URLFetcher* source) {
 125   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
 126
 127   if (source->GetStatus().is_success() && source->GetResponseCode() == 200) {
 128     SetProgress(kProgressComplete);
 129
 130     download_continuation_.Run();
 131
 132     // Remove the reference to ourselves in this closure.
 133     download_continuation_ = base::Closure();
 134   } else {
 135     Error(error::kDownloadInterrupted);
 136   }
 137 }
 138
 139 void WriteFromUrlOperation::VerifyDownload(const base::Closure& continuation) {
 140   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
 141
 142   if (IsCancelled()) {
 143     return;
 144   }
 145
 146   // Skip verify if no hash.
 147   if (hash_.empty()) {
 148     BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE, continuation);
 149     return;
 150   }
 151
 152   SetStage(image_writer_api::STAGE_VERIFYDOWNLOAD);
 153
 154   GetMD5SumOfFile(
 155       image_path_,
 156       0,
 157       0,
 158       kProgressComplete,
 159       base::Bind(
 160           &WriteFromUrlOperation::VerifyDownloadCompare, this, continuation));
 161 }
 162
 163 void WriteFromUrlOperation::VerifyDownloadCompare(
 164     const base::Closure& continuation,
 165     const std::string& download_hash) {
 166   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
 167   if (download_hash != hash_) {
 168     Error(error::kDownloadHashError);
 169     return;
 170   }
 171
 172   BrowserThread::PostTask(
 173       BrowserThread::FILE,
 174       FROM_HERE,
 175       base::Bind(
 176           &WriteFromUrlOperation::VerifyDownloadComplete, this, continuation));
 177 }
 178
 179 void WriteFromUrlOperation::VerifyDownloadComplete(
 180     const base::Closure& continuation) {
 181   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
 182   if (IsCancelled()) {
 183     return;
 184   }
 185
 186   SetProgress(kProgressComplete);
 187   BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE, continuation);
 188 }
 189
 190 } // namespace image_writer
 191 } // namespace extensions