content/browser/download/save_file_manager.cc

   1 // Copyright (c) 2012 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 "build/build_config.h"
   6
   7 #include "content/browser/download/save_file_manager.h"
   8
   9 #include "base/bind.h"
  10 #include "base/files/file_util.h"
  11 #include "base/logging.h"
  12 #include "base/stl_util.h"
  13 #include "base/strings/string_util.h"
  14 #include "base/threading/thread.h"
  15 #include "content/browser/download/save_file.h"
  16 #include "content/browser/download/save_package.h"
  17 #include "content/browser/loader/resource_dispatcher_host_impl.h"
  18 #include "content/browser/renderer_host/render_view_host_impl.h"
  19 #include "content/browser/web_contents/web_contents_impl.h"
  20 #include "content/public/browser/browser_thread.h"
  21 #include "net/base/filename_util.h"
  22 #include "net/base/io_buffer.h"
  23 #include "url/gurl.h"
  24
  25 namespace content {
  26
  27 SaveFileManager::SaveFileManager()
  28     : next_id_(0) {
  29 }
  30
  31 SaveFileManager::~SaveFileManager() {
  32   // Check for clean shutdown.
  33   DCHECK(save_file_map_.empty());
  34 }
  35
  36 // Called during the browser shutdown process to clean up any state (open files,
  37 // timers) that live on the saving thread (file thread).
  38 void SaveFileManager::Shutdown() {
  39   BrowserThread::PostTask(
  40       BrowserThread::FILE, FROM_HERE,
  41       base::Bind(&SaveFileManager::OnShutdown, this));
  42 }
  43
  44 // Stop file thread operations.
  45 void SaveFileManager::OnShutdown() {
  46   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
  47   STLDeleteValues(&save_file_map_);
  48 }
  49
  50 SaveFile* SaveFileManager::LookupSaveFile(int save_id) {
  51   SaveFileMap::iterator it = save_file_map_.find(save_id);
  52   return it == save_file_map_.end() ? NULL : it->second;
  53 }
  54
  55 // Called on the IO thread when
  56 // a) The ResourceDispatcherHostImpl has decided that a request is savable.
  57 // b) The resource does not come from the network, but we still need a
  58 // save ID for for managing the status of the saving operation. So we
  59 // file a request from the file thread to the IO thread to generate a
  60 // unique save ID.
  61 int SaveFileManager::GetNextId() {
  62   DCHECK_CURRENTLY_ON(BrowserThread::IO);
  63   return next_id_++;
  64 }
  65
  66 void SaveFileManager::RegisterStartingRequest(const GURL& save_url,
  67                                               SavePackage* save_package) {
  68   // Make sure it runs in the UI thread.
  69   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  70   int contents_id = save_package->contents_id();
  71
  72   // Register this starting request.
  73   StartingRequestsMap& starting_requests =
  74       contents_starting_requests_[contents_id];
  75   bool never_present = starting_requests.insert(
  76       StartingRequestsMap::value_type(save_url.spec(), save_package)).second;
  77   DCHECK(never_present);
  78 }
  79
  80 SavePackage* SaveFileManager::UnregisterStartingRequest(
  81     const GURL& save_url, int contents_id) {
  82   // Make sure it runs in UI thread.
  83   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  84
  85   ContentsToStartingRequestsMap::iterator it =
  86       contents_starting_requests_.find(contents_id);
  87   if (it != contents_starting_requests_.end()) {
  88     StartingRequestsMap& requests = it->second;
  89     StartingRequestsMap::iterator sit = requests.find(save_url.spec());
  90     if (sit == requests.end())
  91       return NULL;
  92
  93     // Found, erase it from starting list and return SavePackage.
  94     SavePackage* save_package = sit->second;
  95     requests.erase(sit);
  96     // If there is no element in requests, remove it
  97     if (requests.empty())
  98       contents_starting_requests_.erase(it);
  99     return save_package;
 100   }
 101
 102   return NULL;
 103 }
 104
 105 // Look up a SavePackage according to a save id.
 106 SavePackage* SaveFileManager::LookupPackage(int save_id) {
 107   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 108   SavePackageMap::iterator it = packages_.find(save_id);
 109   if (it != packages_.end())
 110     return it->second;
 111   return NULL;
 112 }
 113
 114 // Call from SavePackage for starting a saving job
 115 void SaveFileManager::SaveURL(
 116     const GURL& url,
 117     const Referrer& referrer,
 118     int render_process_host_id,
 119     int render_view_id,
 120     SaveFileCreateInfo::SaveFileSource save_source,
 121     const base::FilePath& file_full_path,
 122     ResourceContext* context,
 123     SavePackage* save_package) {
 124   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 125
 126   // Register a saving job.
 127   RegisterStartingRequest(url, save_package);
 128   if (save_source == SaveFileCreateInfo::SAVE_FILE_FROM_NET) {
 129     DCHECK(url.is_valid());
 130
 131     BrowserThread::PostTask(
 132         BrowserThread::IO, FROM_HERE,
 133         base::Bind(&SaveFileManager::OnSaveURL, this, url, referrer,
 134             render_process_host_id, render_view_id, context));
 135   } else {
 136     // We manually start the save job.
 137     SaveFileCreateInfo* info = new SaveFileCreateInfo(file_full_path,
 138          url,
 139          save_source,
 140          -1);
 141     info->render_process_id = render_process_host_id;
 142     info->render_view_id = render_view_id;
 143
 144     // Since the data will come from render process, so we need to start
 145     // this kind of save job by ourself.
 146     BrowserThread::PostTask(
 147         BrowserThread::IO, FROM_HERE,
 148         base::Bind(&SaveFileManager::OnRequireSaveJobFromOtherSource,
 149             this, info));
 150   }
 151 }
 152
 153 // Utility function for look up table maintenance, called on the UI thread.
 154 // A manager may have multiple save page job (SavePackage) in progress,
 155 // so we just look up the save id and remove it from the tracking table.
 156 // If the save id is -1, it means we just send a request to save, but the
 157 // saving action has still not happened, need to call UnregisterStartingRequest
 158 // to remove it from the tracking map.
 159 void SaveFileManager::RemoveSaveFile(int save_id, const GURL& save_url,
 160                                      SavePackage* package) {
 161   DCHECK(package);
 162   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 163   // A save page job (SavePackage) can only have one manager,
 164   // so remove it if it exists.
 165   if (save_id == -1) {
 166     SavePackage* old_package =
 167         UnregisterStartingRequest(save_url, package->contents_id());
 168     DCHECK_EQ(old_package, package);
 169   } else {
 170     SavePackageMap::iterator it = packages_.find(save_id);
 171     if (it != packages_.end())
 172       packages_.erase(it);
 173   }
 174 }
 175
 176 // Static
 177 SavePackage* SaveFileManager::GetSavePackageFromRenderIds(
 178     int render_process_id, int render_view_id) {
 179   RenderViewHostImpl* render_view_host =
 180       RenderViewHostImpl::FromID(render_process_id, render_view_id);
 181   if (!render_view_host)
 182     return NULL;
 183
 184   WebContentsImpl* contents = static_cast<WebContentsImpl*>(
 185       render_view_host->GetDelegate()->GetAsWebContents());
 186   if (!contents)
 187     return NULL;
 188
 189   return contents->save_package();
 190 }
 191
 192 void SaveFileManager::DeleteDirectoryOrFile(const base::FilePath& full_path,
 193                                             bool is_dir) {
 194   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 195   BrowserThread::PostTask(
 196       BrowserThread::FILE, FROM_HERE,
 197       base::Bind(&SaveFileManager::OnDeleteDirectoryOrFile,
 198           this, full_path, is_dir));
 199 }
 200
 201 void SaveFileManager::SendCancelRequest(int save_id) {
 202   // Cancel the request which has specific save id.
 203   DCHECK_GT(save_id, -1);
 204   BrowserThread::PostTask(
 205       BrowserThread::FILE, FROM_HERE,
 206       base::Bind(&SaveFileManager::CancelSave, this, save_id));
 207 }
 208
 209 // Notifications sent from the IO thread and run on the file thread:
 210
 211 // The IO thread created |info|, but the file thread (this method) uses it
 212 // to create a SaveFile which will hold and finally destroy |info|. It will
 213 // then passes |info| to the UI thread for reporting saving status.
 214 void SaveFileManager::StartSave(SaveFileCreateInfo* info) {
 215   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
 216   DCHECK(info);
 217   // No need to calculate hash.
 218   SaveFile* save_file = new SaveFile(info, false);
 219
 220   // TODO(phajdan.jr): We should check the return value and handle errors here.
 221   save_file->Initialize();
 222
 223   DCHECK(!LookupSaveFile(info->save_id));
 224   save_file_map_[info->save_id] = save_file;
 225   info->path = save_file->FullPath();
 226
 227   BrowserThread::PostTask(
 228       BrowserThread::UI, FROM_HERE,
 229       base::Bind(&SaveFileManager::OnStartSave, this, info));
 230 }
 231
 232 // We do forward an update to the UI thread here, since we do not use timer to
 233 // update the UI. If the user has canceled the saving action (in the UI
 234 // thread). We may receive a few more updates before the IO thread gets the
 235 // cancel message. We just delete the data since the SaveFile has been deleted.
 236 void SaveFileManager::UpdateSaveProgress(int save_id,
 237                                          net::IOBuffer* data,
 238                                          int data_len) {
 239   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
 240   SaveFile* save_file = LookupSaveFile(save_id);
 241   if (save_file) {
 242     DCHECK(save_file->InProgress());
 243
 244     DownloadInterruptReason reason =
 245         save_file->AppendDataToFile(data->data(), data_len);
 246     BrowserThread::PostTask(
 247         BrowserThread::UI, FROM_HERE,
 248         base::Bind(&SaveFileManager::OnUpdateSaveProgress,
 249                    this,
 250                    save_file->save_id(),
 251                    save_file->BytesSoFar(),
 252                    reason == DOWNLOAD_INTERRUPT_REASON_NONE));
 253   }
 254 }
 255
 256 // The IO thread will call this when saving is completed or it got error when
 257 // fetching data. In the former case, we forward the message to OnSaveFinished
 258 // in UI thread. In the latter case, the save ID will be -1, which means the
 259 // saving action did not even start, so we need to call OnErrorFinished in UI
 260 // thread, which will use the save URL to find corresponding request record and
 261 // delete it.
 262 void SaveFileManager::SaveFinished(int save_id,
 263                                    const GURL& save_url,
 264                                    int render_process_id,
 265                                    bool is_success) {
 266   DVLOG(20) << " " << __FUNCTION__ << "()"
 267             << " save_id = " << save_id
 268             << " save_url = \"" << save_url.spec() << "\""
 269             << " is_success = " << is_success;
 270   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
 271   SaveFileMap::iterator it = save_file_map_.find(save_id);
 272   if (it != save_file_map_.end()) {
 273     SaveFile* save_file = it->second;
 274     // This routine may be called twice for the same from from
 275     // SaveePackage::OnReceivedSerializedHtmlData, once for the file
 276     // itself, and once when all frames have been serialized.
 277     // So we can't assert that the file is InProgress() here.
 278     // TODO(rdsmith): Fix this logic and put the DCHECK below back in.
 279     // DCHECK(save_file->InProgress());
 280
 281     DVLOG(20) << " " << __FUNCTION__ << "()"
 282               << " save_file = " << save_file->DebugString();
 283     BrowserThread::PostTask(
 284         BrowserThread::UI, FROM_HERE,
 285         base::Bind(&SaveFileManager::OnSaveFinished, this, save_id,
 286             save_file->BytesSoFar(), is_success));
 287
 288     save_file->Finish();
 289     save_file->Detach();
 290   } else if (save_id == -1) {
 291     // Before saving started, we got error. We still call finish process.
 292     DCHECK(!save_url.is_empty());
 293     BrowserThread::PostTask(
 294         BrowserThread::UI, FROM_HERE,
 295         base::Bind(&SaveFileManager::OnErrorFinished, this, save_url,
 296             render_process_id));
 297   }
 298 }
 299
 300 // Notifications sent from the file thread and run on the UI thread.
 301
 302 void SaveFileManager::OnStartSave(const SaveFileCreateInfo* info) {
 303   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 304   SavePackage* save_package =
 305       GetSavePackageFromRenderIds(info->render_process_id,
 306                                   info->render_view_id);
 307   if (!save_package) {
 308     // Cancel this request.
 309     SendCancelRequest(info->save_id);
 310     return;
 311   }
 312
 313   // Insert started saving job to tracking list.
 314   SavePackageMap::iterator sit = packages_.find(info->save_id);
 315   if (sit == packages_.end()) {
 316     // Find the registered request. If we can not find, it means we have
 317     // canceled the job before.
 318     SavePackage* old_save_package = UnregisterStartingRequest(info->url,
 319         info->render_process_id);
 320     if (!old_save_package) {
 321       // Cancel this request.
 322       SendCancelRequest(info->save_id);
 323       return;
 324     }
 325     DCHECK_EQ(old_save_package, save_package);
 326     packages_[info->save_id] = save_package;
 327   } else {
 328     NOTREACHED();
 329   }
 330
 331   // Forward this message to SavePackage.
 332   save_package->StartSave(info);
 333 }
 334
 335 void SaveFileManager::OnUpdateSaveProgress(int save_id, int64 bytes_so_far,
 336                                            bool write_success) {
 337   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 338   SavePackage* package = LookupPackage(save_id);
 339   if (package)
 340     package->UpdateSaveProgress(save_id, bytes_so_far, write_success);
 341   else
 342     SendCancelRequest(save_id);
 343 }
 344
 345 void SaveFileManager::OnSaveFinished(int save_id,
 346                                      int64 bytes_so_far,
 347                                      bool is_success) {
 348   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 349   SavePackage* package = LookupPackage(save_id);
 350   if (package)
 351     package->SaveFinished(save_id, bytes_so_far, is_success);
 352 }
 353
 354 void SaveFileManager::OnErrorFinished(const GURL& save_url, int contents_id) {
 355   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 356   SavePackage* save_package = UnregisterStartingRequest(save_url, contents_id);
 357   if (save_package)
 358     save_package->SaveFailed(save_url);
 359 }
 360
 361 // Notifications sent from the UI thread and run on the IO thread.
 362
 363 void SaveFileManager::OnSaveURL(
 364     const GURL& url,
 365     const Referrer& referrer,
 366     int render_process_host_id,
 367     int render_view_id,
 368     ResourceContext* context) {
 369   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 370   ResourceDispatcherHostImpl::Get()->BeginSaveFile(url,
 371                                                    referrer,
 372                                                    render_process_host_id,
 373                                                    render_view_id,
 374                                                    context);
 375 }
 376
 377 void SaveFileManager::OnRequireSaveJobFromOtherSource(
 378     SaveFileCreateInfo* info) {
 379   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 380   DCHECK_EQ(info->save_id, -1);
 381   // Generate a unique save id.
 382   info->save_id = GetNextId();
 383   // Start real saving action.
 384   BrowserThread::PostTask(
 385       BrowserThread::FILE, FROM_HERE,
 386       base::Bind(&SaveFileManager::StartSave, this, info));
 387 }
 388
 389 void SaveFileManager::ExecuteCancelSaveRequest(int render_process_id,
 390                                                int request_id) {
 391   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 392   ResourceDispatcherHostImpl::Get()->CancelRequest(
 393       render_process_id, request_id);
 394 }
 395
 396 // Notifications sent from the UI thread and run on the file thread.
 397
 398 // This method will be sent via a user action, or shutdown on the UI thread,
 399 // and run on the file thread. We don't post a message back for cancels,
 400 // but we do forward the cancel to the IO thread. Since this message has been
 401 // sent from the UI thread, the saving job may have already completed and
 402 // won't exist in our map.
 403 void SaveFileManager::CancelSave(int save_id) {
 404   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
 405   SaveFileMap::iterator it = save_file_map_.find(save_id);
 406   if (it != save_file_map_.end()) {
 407     SaveFile* save_file = it->second;
 408
 409     if (!save_file->InProgress()) {
 410       // We've won a race with the UI thread--we finished the file before
 411       // the UI thread cancelled it on us.  Unfortunately, in this situation
 412       // the cancel wins, so we need to delete the now detached file.
 413       base::DeleteFile(save_file->FullPath(), false);
 414     } else if (save_file->save_source() ==
 415                SaveFileCreateInfo::SAVE_FILE_FROM_NET) {
 416       // If the data comes from the net IO thread and hasn't completed
 417       // yet, then forward the cancel message to IO thread & cancel the
 418       // save locally.  If the data doesn't come from the IO thread,
 419       // we can ignore the message.
 420       BrowserThread::PostTask(
 421           BrowserThread::IO, FROM_HERE,
 422           base::Bind(&SaveFileManager::ExecuteCancelSaveRequest, this,
 423               save_file->render_process_id(), save_file->request_id()));
 424     }
 425
 426     // Whatever the save file is complete or not, just delete it.  This
 427     // will delete the underlying file if InProgress() is true.
 428     save_file_map_.erase(it);
 429     delete save_file;
 430   }
 431 }
 432
 433 // It is possible that SaveItem which has specified save_id has been canceled
 434 // before this function runs. So if we can not find corresponding SaveFile by
 435 // using specified save_id, just return.
 436 void SaveFileManager::SaveLocalFile(const GURL& original_file_url,
 437                                     int save_id,
 438                                     int render_process_id) {
 439   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
 440   SaveFile* save_file = LookupSaveFile(save_id);
 441   if (!save_file)
 442     return;
 443   // If it has finished, just return.
 444   if (!save_file->InProgress())
 445     return;
 446
 447   // Close the save file before the copy operation.
 448   save_file->Finish();
 449   save_file->Detach();
 450
 451   DCHECK(original_file_url.SchemeIsFile());
 452   base::FilePath file_path;
 453   net::FileURLToFilePath(original_file_url, &file_path);
 454   // If we can not get valid file path from original URL, treat it as
 455   // disk error.
 456   if (file_path.empty())
 457     SaveFinished(save_id, original_file_url, render_process_id, false);
 458
 459   // Copy the local file to the temporary file. It will be renamed to its
 460   // final name later.
 461   bool success = base::CopyFile(file_path, save_file->FullPath());
 462   if (!success)
 463     base::DeleteFile(save_file->FullPath(), false);
 464   SaveFinished(save_id, original_file_url, render_process_id, success);
 465 }
 466
 467 void SaveFileManager::OnDeleteDirectoryOrFile(const base::FilePath& full_path,
 468                                               bool is_dir) {
 469   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
 470   DCHECK(!full_path.empty());
 471
 472   base::DeleteFile(full_path, is_dir);
 473 }
 474
 475 void SaveFileManager::RenameAllFiles(
 476     const FinalNameList& final_names,
 477     const base::FilePath& resource_dir,
 478     int render_process_id,
 479     int render_view_id,
 480     int save_package_id) {
 481   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
 482
 483   if (!resource_dir.empty() && !base::PathExists(resource_dir))
 484     base::CreateDirectory(resource_dir);
 485
 486   for (FinalNameList::const_iterator i = final_names.begin();
 487       i != final_names.end(); ++i) {
 488     SaveFileMap::iterator it = save_file_map_.find(i->first);
 489     if (it != save_file_map_.end()) {
 490       SaveFile* save_file = it->second;
 491       DCHECK(!save_file->InProgress());
 492       save_file->Rename(i->second);
 493       delete save_file;
 494       save_file_map_.erase(it);
 495     }
 496   }
 497
 498   BrowserThread::PostTask(
 499       BrowserThread::UI, FROM_HERE,
 500       base::Bind(&SaveFileManager::OnFinishSavePageJob, this,
 501           render_process_id, render_view_id, save_package_id));
 502 }
 503
 504 void SaveFileManager::OnFinishSavePageJob(int render_process_id,
 505                                           int render_view_id,
 506                                           int save_package_id) {
 507   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 508
 509   SavePackage* save_package =
 510       GetSavePackageFromRenderIds(render_process_id, render_view_id);
 511
 512   if (save_package && save_package->id() == save_package_id)
 513     save_package->Finish();
 514 }
 515
 516 void SaveFileManager::RemoveSavedFileFromFileMap(
 517     const SaveIDList& save_ids) {
 518   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
 519
 520   for (SaveIDList::const_iterator i = save_ids.begin();
 521       i != save_ids.end(); ++i) {
 522     SaveFileMap::iterator it = save_file_map_.find(*i);
 523     if (it != save_file_map_.end()) {
 524       SaveFile* save_file = it->second;
 525       DCHECK(!save_file->InProgress());
 526       base::DeleteFile(save_file->FullPath(), false);
 527       delete save_file;
 528       save_file_map_.erase(it);
 529     }
 530   }
 531 }
 532
 533 }  // namespace content