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| 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 "webkit/browser/fileapi/file_system_context.h" | |
| 6 | |
| 7 #include "base/bind.h" | |
| 8 #include "base/single_thread_task_runner.h" | |
| 9 #include "base/stl_util.h" | |
| 10 #include "base/task_runner_util.h" | |
| 11 #include "net/url_request/url_request.h" | |
| 12 #include "url/gurl.h" | |
| 13 #include "webkit/browser/blob/file_stream_reader.h" | |
| 14 #include "webkit/browser/fileapi/copy_or_move_file_validator.h" | |
| 15 #include "webkit/browser/fileapi/external_mount_points.h" | |
| 16 #include "webkit/browser/fileapi/file_permission_policy.h" | |
| 17 #include "webkit/browser/fileapi/file_stream_writer.h" | |
| 18 #include "webkit/browser/fileapi/file_system_file_util.h" | |
| 19 #include "webkit/browser/fileapi/file_system_operation.h" | |
| 20 #include "webkit/browser/fileapi/file_system_operation_runner.h" | |
| 21 #include "webkit/browser/fileapi/file_system_options.h" | |
| 22 #include "webkit/browser/fileapi/file_system_quota_client.h" | |
| 23 #include "webkit/browser/fileapi/file_system_url.h" | |
| 24 #include "webkit/browser/fileapi/isolated_context.h" | |
| 25 #include "webkit/browser/fileapi/isolated_file_system_backend.h" | |
| 26 #include "webkit/browser/fileapi/mount_points.h" | |
| 27 #include "webkit/browser/fileapi/quota/quota_reservation.h" | |
| 28 #include "webkit/browser/fileapi/sandbox_file_system_backend.h" | |
| 29 #include "webkit/browser/quota/quota_manager_proxy.h" | |
| 30 #include "webkit/browser/quota/special_storage_policy.h" | |
| 31 #include "webkit/common/fileapi/file_system_info.h" | |
| 32 #include "webkit/common/fileapi/file_system_util.h" | |
| 33 | |
| 34 using storage::QuotaClient; | |
| 35 | |
| 36 namespace storage { | |
| 37 | |
| 38 namespace { | |
| 39 | |
| 40 QuotaClient* CreateQuotaClient( | |
| 41 FileSystemContext* context, | |
| 42 bool is_incognito) { | |
| 43 return new FileSystemQuotaClient(context, is_incognito); | |
| 44 } | |
| 45 | |
| 46 | |
| 47 void DidGetMetadataForResolveURL( | |
| 48 const base::FilePath& path, | |
| 49 const FileSystemContext::ResolveURLCallback& callback, | |
| 50 const FileSystemInfo& info, | |
| 51 base::File::Error error, | |
| 52 const base::File::Info& file_info) { | |
| 53 if (error != base::File::FILE_OK) { | |
| 54 if (error == base::File::FILE_ERROR_NOT_FOUND) { | |
| 55 callback.Run(base::File::FILE_OK, info, path, | |
| 56 FileSystemContext::RESOLVED_ENTRY_NOT_FOUND); | |
| 57 } else { | |
| 58 callback.Run(error, FileSystemInfo(), base::FilePath(), | |
| 59 FileSystemContext::RESOLVED_ENTRY_NOT_FOUND); | |
| 60 } | |
| 61 return; | |
| 62 } | |
| 63 callback.Run(error, info, path, file_info.is_directory ? | |
| 64 FileSystemContext::RESOLVED_ENTRY_DIRECTORY : | |
| 65 FileSystemContext::RESOLVED_ENTRY_FILE); | |
| 66 } | |
| 67 | |
| 68 void RelayResolveURLCallback( | |
| 69 scoped_refptr<base::MessageLoopProxy> message_loop, | |
| 70 const FileSystemContext::ResolveURLCallback& callback, | |
| 71 base::File::Error result, | |
| 72 const FileSystemInfo& info, | |
| 73 const base::FilePath& file_path, | |
| 74 FileSystemContext::ResolvedEntryType type) { | |
| 75 message_loop->PostTask( | |
| 76 FROM_HERE, base::Bind(callback, result, info, file_path, type)); | |
| 77 } | |
| 78 | |
| 79 } // namespace | |
| 80 | |
| 81 // static | |
| 82 int FileSystemContext::GetPermissionPolicy(FileSystemType type) { | |
| 83 switch (type) { | |
| 84 case kFileSystemTypeTemporary: | |
| 85 case kFileSystemTypePersistent: | |
| 86 case kFileSystemTypeSyncable: | |
| 87 return FILE_PERMISSION_SANDBOX; | |
| 88 | |
| 89 case kFileSystemTypeDrive: | |
| 90 case kFileSystemTypeNativeForPlatformApp: | |
| 91 case kFileSystemTypeNativeLocal: | |
| 92 case kFileSystemTypeCloudDevice: | |
| 93 case kFileSystemTypeProvided: | |
| 94 case kFileSystemTypeDeviceMediaAsFileStorage: | |
| 95 return FILE_PERMISSION_USE_FILE_PERMISSION; | |
| 96 | |
| 97 case kFileSystemTypeRestrictedNativeLocal: | |
| 98 return FILE_PERMISSION_READ_ONLY | | |
| 99 FILE_PERMISSION_USE_FILE_PERMISSION; | |
| 100 | |
| 101 case kFileSystemTypeDeviceMedia: | |
| 102 case kFileSystemTypeIphoto: | |
| 103 case kFileSystemTypeItunes: | |
| 104 case kFileSystemTypeNativeMedia: | |
| 105 case kFileSystemTypePicasa: | |
| 106 return FILE_PERMISSION_USE_FILE_PERMISSION; | |
| 107 | |
| 108 // Following types are only accessed via IsolatedFileSystem, and | |
| 109 // don't have their own permission policies. | |
| 110 case kFileSystemTypeDragged: | |
| 111 case kFileSystemTypeForTransientFile: | |
| 112 case kFileSystemTypePluginPrivate: | |
| 113 return FILE_PERMISSION_ALWAYS_DENY; | |
| 114 | |
| 115 // Following types only appear as mount_type, and will not be | |
| 116 // queried for their permission policies. | |
| 117 case kFileSystemTypeIsolated: | |
| 118 case kFileSystemTypeExternal: | |
| 119 return FILE_PERMISSION_ALWAYS_DENY; | |
| 120 | |
| 121 // Following types should not be used to access files by FileAPI clients. | |
| 122 case kFileSystemTypeTest: | |
| 123 case kFileSystemTypeSyncableForInternalSync: | |
| 124 case kFileSystemInternalTypeEnumEnd: | |
| 125 case kFileSystemInternalTypeEnumStart: | |
| 126 case kFileSystemTypeUnknown: | |
| 127 return FILE_PERMISSION_ALWAYS_DENY; | |
| 128 } | |
| 129 NOTREACHED(); | |
| 130 return FILE_PERMISSION_ALWAYS_DENY; | |
| 131 } | |
| 132 | |
| 133 FileSystemContext::FileSystemContext( | |
| 134 base::SingleThreadTaskRunner* io_task_runner, | |
| 135 base::SequencedTaskRunner* file_task_runner, | |
| 136 ExternalMountPoints* external_mount_points, | |
| 137 storage::SpecialStoragePolicy* special_storage_policy, | |
| 138 storage::QuotaManagerProxy* quota_manager_proxy, | |
| 139 ScopedVector<FileSystemBackend> additional_backends, | |
| 140 const std::vector<URLRequestAutoMountHandler>& auto_mount_handlers, | |
| 141 const base::FilePath& partition_path, | |
| 142 const FileSystemOptions& options) | |
| 143 : io_task_runner_(io_task_runner), | |
| 144 default_file_task_runner_(file_task_runner), | |
| 145 quota_manager_proxy_(quota_manager_proxy), | |
| 146 sandbox_delegate_( | |
| 147 new SandboxFileSystemBackendDelegate(quota_manager_proxy, | |
| 148 file_task_runner, | |
| 149 partition_path, | |
| 150 special_storage_policy, | |
| 151 options)), | |
| 152 sandbox_backend_(new SandboxFileSystemBackend(sandbox_delegate_.get())), | |
| 153 isolated_backend_(new IsolatedFileSystemBackend()), | |
| 154 plugin_private_backend_( | |
| 155 new PluginPrivateFileSystemBackend(file_task_runner, | |
| 156 partition_path, | |
| 157 special_storage_policy, | |
| 158 options)), | |
| 159 additional_backends_(additional_backends.Pass()), | |
| 160 auto_mount_handlers_(auto_mount_handlers), | |
| 161 external_mount_points_(external_mount_points), | |
| 162 partition_path_(partition_path), | |
| 163 is_incognito_(options.is_incognito()), | |
| 164 operation_runner_(new FileSystemOperationRunner(this)) { | |
| 165 RegisterBackend(sandbox_backend_.get()); | |
| 166 RegisterBackend(isolated_backend_.get()); | |
| 167 RegisterBackend(plugin_private_backend_.get()); | |
| 168 | |
| 169 for (ScopedVector<FileSystemBackend>::const_iterator iter = | |
| 170 additional_backends_.begin(); | |
| 171 iter != additional_backends_.end(); ++iter) { | |
| 172 RegisterBackend(*iter); | |
| 173 } | |
| 174 | |
| 175 if (quota_manager_proxy) { | |
| 176 // Quota client assumes all backends have registered. | |
| 177 quota_manager_proxy->RegisterClient(CreateQuotaClient( | |
| 178 this, options.is_incognito())); | |
| 179 } | |
| 180 | |
| 181 sandbox_backend_->Initialize(this); | |
| 182 isolated_backend_->Initialize(this); | |
| 183 plugin_private_backend_->Initialize(this); | |
| 184 for (ScopedVector<FileSystemBackend>::const_iterator iter = | |
| 185 additional_backends_.begin(); | |
| 186 iter != additional_backends_.end(); ++iter) { | |
| 187 (*iter)->Initialize(this); | |
| 188 } | |
| 189 | |
| 190 // Additional mount points must be added before regular system-wide | |
| 191 // mount points. | |
| 192 if (external_mount_points) | |
| 193 url_crackers_.push_back(external_mount_points); | |
| 194 url_crackers_.push_back(ExternalMountPoints::GetSystemInstance()); | |
| 195 url_crackers_.push_back(IsolatedContext::GetInstance()); | |
| 196 } | |
| 197 | |
| 198 bool FileSystemContext::DeleteDataForOriginOnFileTaskRunner( | |
| 199 const GURL& origin_url) { | |
| 200 DCHECK(default_file_task_runner()->RunsTasksOnCurrentThread()); | |
| 201 DCHECK(origin_url == origin_url.GetOrigin()); | |
| 202 | |
| 203 bool success = true; | |
| 204 for (FileSystemBackendMap::iterator iter = backend_map_.begin(); | |
| 205 iter != backend_map_.end(); | |
| 206 ++iter) { | |
| 207 FileSystemBackend* backend = iter->second; | |
| 208 if (!backend->GetQuotaUtil()) | |
| 209 continue; | |
| 210 if (backend->GetQuotaUtil()->DeleteOriginDataOnFileTaskRunner( | |
| 211 this, quota_manager_proxy(), origin_url, iter->first) | |
| 212 != base::File::FILE_OK) { | |
| 213 // Continue the loop, but record the failure. | |
| 214 success = false; | |
| 215 } | |
| 216 } | |
| 217 | |
| 218 return success; | |
| 219 } | |
| 220 | |
| 221 scoped_refptr<QuotaReservation> | |
| 222 FileSystemContext::CreateQuotaReservationOnFileTaskRunner( | |
| 223 const GURL& origin_url, | |
| 224 FileSystemType type) { | |
| 225 DCHECK(default_file_task_runner()->RunsTasksOnCurrentThread()); | |
| 226 FileSystemBackend* backend = GetFileSystemBackend(type); | |
| 227 if (!backend || !backend->GetQuotaUtil()) | |
| 228 return scoped_refptr<QuotaReservation>(); | |
| 229 return backend->GetQuotaUtil()->CreateQuotaReservationOnFileTaskRunner( | |
| 230 origin_url, type); | |
| 231 } | |
| 232 | |
| 233 void FileSystemContext::Shutdown() { | |
| 234 if (!io_task_runner_->RunsTasksOnCurrentThread()) { | |
| 235 io_task_runner_->PostTask( | |
| 236 FROM_HERE, base::Bind(&FileSystemContext::Shutdown, | |
| 237 make_scoped_refptr(this))); | |
| 238 return; | |
| 239 } | |
| 240 operation_runner_->Shutdown(); | |
| 241 } | |
| 242 | |
| 243 FileSystemQuotaUtil* | |
| 244 FileSystemContext::GetQuotaUtil(FileSystemType type) const { | |
| 245 FileSystemBackend* backend = GetFileSystemBackend(type); | |
| 246 if (!backend) | |
| 247 return NULL; | |
| 248 return backend->GetQuotaUtil(); | |
| 249 } | |
| 250 | |
| 251 AsyncFileUtil* FileSystemContext::GetAsyncFileUtil( | |
| 252 FileSystemType type) const { | |
| 253 FileSystemBackend* backend = GetFileSystemBackend(type); | |
| 254 if (!backend) | |
| 255 return NULL; | |
| 256 return backend->GetAsyncFileUtil(type); | |
| 257 } | |
| 258 | |
| 259 CopyOrMoveFileValidatorFactory* | |
| 260 FileSystemContext::GetCopyOrMoveFileValidatorFactory( | |
| 261 FileSystemType type, base::File::Error* error_code) const { | |
| 262 DCHECK(error_code); | |
| 263 *error_code = base::File::FILE_OK; | |
| 264 FileSystemBackend* backend = GetFileSystemBackend(type); | |
| 265 if (!backend) | |
| 266 return NULL; | |
| 267 return backend->GetCopyOrMoveFileValidatorFactory( | |
| 268 type, error_code); | |
| 269 } | |
| 270 | |
| 271 FileSystemBackend* FileSystemContext::GetFileSystemBackend( | |
| 272 FileSystemType type) const { | |
| 273 FileSystemBackendMap::const_iterator found = backend_map_.find(type); | |
| 274 if (found != backend_map_.end()) | |
| 275 return found->second; | |
| 276 NOTREACHED() << "Unknown filesystem type: " << type; | |
| 277 return NULL; | |
| 278 } | |
| 279 | |
| 280 WatcherManager* FileSystemContext::GetWatcherManager( | |
| 281 FileSystemType type) const { | |
| 282 FileSystemBackend* backend = GetFileSystemBackend(type); | |
| 283 if (!backend) | |
| 284 return NULL; | |
| 285 return backend->GetWatcherManager(type); | |
| 286 } | |
| 287 | |
| 288 bool FileSystemContext::IsSandboxFileSystem(FileSystemType type) const { | |
| 289 FileSystemBackendMap::const_iterator found = backend_map_.find(type); | |
| 290 return found != backend_map_.end() && found->second->GetQuotaUtil(); | |
| 291 } | |
| 292 | |
| 293 const UpdateObserverList* FileSystemContext::GetUpdateObservers( | |
| 294 FileSystemType type) const { | |
| 295 FileSystemBackend* backend = GetFileSystemBackend(type); | |
| 296 if (backend->GetQuotaUtil()) | |
| 297 return backend->GetQuotaUtil()->GetUpdateObservers(type); | |
| 298 return NULL; | |
| 299 } | |
| 300 | |
| 301 const AccessObserverList* FileSystemContext::GetAccessObservers( | |
| 302 FileSystemType type) const { | |
| 303 FileSystemBackend* backend = GetFileSystemBackend(type); | |
| 304 if (backend->GetQuotaUtil()) | |
| 305 return backend->GetQuotaUtil()->GetAccessObservers(type); | |
| 306 return NULL; | |
| 307 } | |
| 308 | |
| 309 void FileSystemContext::GetFileSystemTypes( | |
| 310 std::vector<FileSystemType>* types) const { | |
| 311 types->clear(); | |
| 312 for (FileSystemBackendMap::const_iterator iter = backend_map_.begin(); | |
| 313 iter != backend_map_.end(); ++iter) | |
| 314 types->push_back(iter->first); | |
| 315 } | |
| 316 | |
| 317 ExternalFileSystemBackend* | |
| 318 FileSystemContext::external_backend() const { | |
| 319 return static_cast<ExternalFileSystemBackend*>( | |
| 320 GetFileSystemBackend(kFileSystemTypeExternal)); | |
| 321 } | |
| 322 | |
| 323 void FileSystemContext::OpenFileSystem( | |
| 324 const GURL& origin_url, | |
| 325 FileSystemType type, | |
| 326 OpenFileSystemMode mode, | |
| 327 const OpenFileSystemCallback& callback) { | |
| 328 DCHECK(io_task_runner_->RunsTasksOnCurrentThread()); | |
| 329 DCHECK(!callback.is_null()); | |
| 330 | |
| 331 if (!FileSystemContext::IsSandboxFileSystem(type)) { | |
| 332 // Disallow opening a non-sandboxed filesystem. | |
| 333 callback.Run(GURL(), std::string(), base::File::FILE_ERROR_SECURITY); | |
| 334 return; | |
| 335 } | |
| 336 | |
| 337 FileSystemBackend* backend = GetFileSystemBackend(type); | |
| 338 if (!backend) { | |
| 339 callback.Run(GURL(), std::string(), base::File::FILE_ERROR_SECURITY); | |
| 340 return; | |
| 341 } | |
| 342 | |
| 343 backend->ResolveURL( | |
| 344 CreateCrackedFileSystemURL(origin_url, type, base::FilePath()), | |
| 345 mode, | |
| 346 callback); | |
| 347 } | |
| 348 | |
| 349 void FileSystemContext::ResolveURL( | |
| 350 const FileSystemURL& url, | |
| 351 const ResolveURLCallback& callback) { | |
| 352 DCHECK(!callback.is_null()); | |
| 353 | |
| 354 // If not on IO thread, forward before passing the task to the backend. | |
| 355 if (!io_task_runner_->RunsTasksOnCurrentThread()) { | |
| 356 ResolveURLCallback relay_callback = | |
| 357 base::Bind(&RelayResolveURLCallback, | |
| 358 base::MessageLoopProxy::current(), callback); | |
| 359 io_task_runner_->PostTask( | |
| 360 FROM_HERE, | |
| 361 base::Bind(&FileSystemContext::ResolveURL, this, url, relay_callback)); | |
| 362 return; | |
| 363 } | |
| 364 | |
| 365 FileSystemBackend* backend = GetFileSystemBackend(url.type()); | |
| 366 if (!backend) { | |
| 367 callback.Run(base::File::FILE_ERROR_SECURITY, | |
| 368 FileSystemInfo(), base::FilePath(), | |
| 369 FileSystemContext::RESOLVED_ENTRY_NOT_FOUND); | |
| 370 return; | |
| 371 } | |
| 372 | |
| 373 backend->ResolveURL( | |
| 374 url, | |
| 375 OPEN_FILE_SYSTEM_FAIL_IF_NONEXISTENT, | |
| 376 base::Bind(&FileSystemContext::DidOpenFileSystemForResolveURL, | |
| 377 this, | |
| 378 url, | |
| 379 callback)); | |
| 380 } | |
| 381 | |
| 382 void FileSystemContext::AttemptAutoMountForURLRequest( | |
| 383 const net::URLRequest* url_request, | |
| 384 const std::string& storage_domain, | |
| 385 const StatusCallback& callback) { | |
| 386 FileSystemURL filesystem_url(url_request->url()); | |
| 387 if (filesystem_url.type() == kFileSystemTypeExternal) { | |
| 388 for (size_t i = 0; i < auto_mount_handlers_.size(); i++) { | |
| 389 if (auto_mount_handlers_[i].Run(url_request, filesystem_url, | |
| 390 storage_domain, callback)) { | |
| 391 return; | |
| 392 } | |
| 393 } | |
| 394 } | |
| 395 callback.Run(base::File::FILE_ERROR_NOT_FOUND); | |
| 396 } | |
| 397 | |
| 398 void FileSystemContext::DeleteFileSystem( | |
| 399 const GURL& origin_url, | |
| 400 FileSystemType type, | |
| 401 const StatusCallback& callback) { | |
| 402 DCHECK(io_task_runner_->RunsTasksOnCurrentThread()); | |
| 403 DCHECK(origin_url == origin_url.GetOrigin()); | |
| 404 DCHECK(!callback.is_null()); | |
| 405 | |
| 406 FileSystemBackend* backend = GetFileSystemBackend(type); | |
| 407 if (!backend) { | |
| 408 callback.Run(base::File::FILE_ERROR_SECURITY); | |
| 409 return; | |
| 410 } | |
| 411 if (!backend->GetQuotaUtil()) { | |
| 412 callback.Run(base::File::FILE_ERROR_INVALID_OPERATION); | |
| 413 return; | |
| 414 } | |
| 415 | |
| 416 base::PostTaskAndReplyWithResult( | |
| 417 default_file_task_runner(), | |
| 418 FROM_HERE, | |
| 419 // It is safe to pass Unretained(quota_util) since context owns it. | |
| 420 base::Bind(&FileSystemQuotaUtil::DeleteOriginDataOnFileTaskRunner, | |
| 421 base::Unretained(backend->GetQuotaUtil()), | |
| 422 make_scoped_refptr(this), | |
| 423 base::Unretained(quota_manager_proxy()), | |
| 424 origin_url, | |
| 425 type), | |
| 426 callback); | |
| 427 } | |
| 428 | |
| 429 scoped_ptr<storage::FileStreamReader> FileSystemContext::CreateFileStreamReader( | |
| 430 const FileSystemURL& url, | |
| 431 int64 offset, | |
| 432 const base::Time& expected_modification_time) { | |
| 433 if (!url.is_valid()) | |
| 434 return scoped_ptr<storage::FileStreamReader>(); | |
| 435 FileSystemBackend* backend = GetFileSystemBackend(url.type()); | |
| 436 if (!backend) | |
| 437 return scoped_ptr<storage::FileStreamReader>(); | |
| 438 return backend->CreateFileStreamReader( | |
| 439 url, offset, expected_modification_time, this); | |
| 440 } | |
| 441 | |
| 442 scoped_ptr<FileStreamWriter> FileSystemContext::CreateFileStreamWriter( | |
| 443 const FileSystemURL& url, | |
| 444 int64 offset) { | |
| 445 if (!url.is_valid()) | |
| 446 return scoped_ptr<FileStreamWriter>(); | |
| 447 FileSystemBackend* backend = GetFileSystemBackend(url.type()); | |
| 448 if (!backend) | |
| 449 return scoped_ptr<FileStreamWriter>(); | |
| 450 return backend->CreateFileStreamWriter(url, offset, this); | |
| 451 } | |
| 452 | |
| 453 scoped_ptr<FileSystemOperationRunner> | |
| 454 FileSystemContext::CreateFileSystemOperationRunner() { | |
| 455 return make_scoped_ptr(new FileSystemOperationRunner(this)); | |
| 456 } | |
| 457 | |
| 458 FileSystemURL FileSystemContext::CrackURL(const GURL& url) const { | |
| 459 return CrackFileSystemURL(FileSystemURL(url)); | |
| 460 } | |
| 461 | |
| 462 FileSystemURL FileSystemContext::CreateCrackedFileSystemURL( | |
| 463 const GURL& origin, | |
| 464 FileSystemType type, | |
| 465 const base::FilePath& path) const { | |
| 466 return CrackFileSystemURL(FileSystemURL(origin, type, path)); | |
| 467 } | |
| 468 | |
| 469 #if defined(OS_CHROMEOS) | |
| 470 void FileSystemContext::EnableTemporaryFileSystemInIncognito() { | |
| 471 sandbox_backend_->set_enable_temporary_file_system_in_incognito(true); | |
| 472 } | |
| 473 #endif | |
| 474 | |
| 475 bool FileSystemContext::CanServeURLRequest(const FileSystemURL& url) const { | |
| 476 // We never support accessing files in isolated filesystems via an URL. | |
| 477 if (url.mount_type() == kFileSystemTypeIsolated) | |
| 478 return false; | |
| 479 #if defined(OS_CHROMEOS) | |
| 480 if (url.type() == kFileSystemTypeTemporary && | |
| 481 sandbox_backend_->enable_temporary_file_system_in_incognito()) { | |
| 482 return true; | |
| 483 } | |
| 484 #endif | |
| 485 return !is_incognito_ || !FileSystemContext::IsSandboxFileSystem(url.type()); | |
| 486 } | |
| 487 | |
| 488 bool FileSystemContext::ShouldFlushOnWriteCompletion( | |
| 489 FileSystemType type) const { | |
| 490 if (IsSandboxFileSystem(type)) { | |
| 491 // Disable Flush() for each write operation on SandboxFileSystems since it | |
| 492 // hurts the performance, assuming the FileSystems are stored in a local | |
| 493 // disk, we don't need to keep calling fsync() for it. | |
| 494 // On the other hand, other FileSystems that may stored on a removable media | |
| 495 // should be Flush()ed as soon as a write operation is completed, so that | |
| 496 // written data is saved over sudden media removal. | |
| 497 return false; | |
| 498 } | |
| 499 return true; | |
| 500 } | |
| 501 | |
| 502 void FileSystemContext::OpenPluginPrivateFileSystem( | |
| 503 const GURL& origin_url, | |
| 504 FileSystemType type, | |
| 505 const std::string& filesystem_id, | |
| 506 const std::string& plugin_id, | |
| 507 OpenFileSystemMode mode, | |
| 508 const StatusCallback& callback) { | |
| 509 DCHECK(plugin_private_backend_); | |
| 510 plugin_private_backend_->OpenPrivateFileSystem( | |
| 511 origin_url, type, filesystem_id, plugin_id, mode, callback); | |
| 512 } | |
| 513 | |
| 514 FileSystemContext::~FileSystemContext() { | |
| 515 } | |
| 516 | |
| 517 void FileSystemContext::DeleteOnCorrectThread() const { | |
| 518 if (!io_task_runner_->RunsTasksOnCurrentThread() && | |
| 519 io_task_runner_->DeleteSoon(FROM_HERE, this)) { | |
| 520 return; | |
| 521 } | |
| 522 delete this; | |
| 523 } | |
| 524 | |
| 525 FileSystemOperation* FileSystemContext::CreateFileSystemOperation( | |
| 526 const FileSystemURL& url, base::File::Error* error_code) { | |
| 527 if (!url.is_valid()) { | |
| 528 if (error_code) | |
| 529 *error_code = base::File::FILE_ERROR_INVALID_URL; | |
| 530 return NULL; | |
| 531 } | |
| 532 | |
| 533 FileSystemBackend* backend = GetFileSystemBackend(url.type()); | |
| 534 if (!backend) { | |
| 535 if (error_code) | |
| 536 *error_code = base::File::FILE_ERROR_FAILED; | |
| 537 return NULL; | |
| 538 } | |
| 539 | |
| 540 base::File::Error fs_error = base::File::FILE_OK; | |
| 541 FileSystemOperation* operation = | |
| 542 backend->CreateFileSystemOperation(url, this, &fs_error); | |
| 543 | |
| 544 if (error_code) | |
| 545 *error_code = fs_error; | |
| 546 return operation; | |
| 547 } | |
| 548 | |
| 549 FileSystemURL FileSystemContext::CrackFileSystemURL( | |
| 550 const FileSystemURL& url) const { | |
| 551 if (!url.is_valid()) | |
| 552 return FileSystemURL(); | |
| 553 | |
| 554 // The returned value in case there is no crackers which can crack the url. | |
| 555 // This is valid situation for non isolated/external file systems. | |
| 556 FileSystemURL current = url; | |
| 557 | |
| 558 // File system may be mounted multiple times (e.g., an isolated filesystem on | |
| 559 // top of an external filesystem). Hence cracking needs to be iterated. | |
| 560 for (;;) { | |
| 561 FileSystemURL cracked = current; | |
| 562 for (size_t i = 0; i < url_crackers_.size(); ++i) { | |
| 563 if (!url_crackers_[i]->HandlesFileSystemMountType(current.type())) | |
| 564 continue; | |
| 565 cracked = url_crackers_[i]->CrackFileSystemURL(current); | |
| 566 if (cracked.is_valid()) | |
| 567 break; | |
| 568 } | |
| 569 if (cracked == current) | |
| 570 break; | |
| 571 current = cracked; | |
| 572 } | |
| 573 return current; | |
| 574 } | |
| 575 | |
| 576 void FileSystemContext::RegisterBackend(FileSystemBackend* backend) { | |
| 577 const FileSystemType mount_types[] = { | |
| 578 kFileSystemTypeTemporary, | |
| 579 kFileSystemTypePersistent, | |
| 580 kFileSystemTypeIsolated, | |
| 581 kFileSystemTypeExternal, | |
| 582 }; | |
| 583 // Register file system backends for public mount types. | |
| 584 for (size_t j = 0; j < ARRAYSIZE_UNSAFE(mount_types); ++j) { | |
| 585 if (backend->CanHandleType(mount_types[j])) { | |
| 586 const bool inserted = backend_map_.insert( | |
| 587 std::make_pair(mount_types[j], backend)).second; | |
| 588 DCHECK(inserted); | |
| 589 } | |
| 590 } | |
| 591 // Register file system backends for internal types. | |
| 592 for (int t = kFileSystemInternalTypeEnumStart + 1; | |
| 593 t < kFileSystemInternalTypeEnumEnd; ++t) { | |
| 594 FileSystemType type = static_cast<FileSystemType>(t); | |
| 595 if (backend->CanHandleType(type)) { | |
| 596 const bool inserted = backend_map_.insert( | |
| 597 std::make_pair(type, backend)).second; | |
| 598 DCHECK(inserted); | |
| 599 } | |
| 600 } | |
| 601 } | |
| 602 | |
| 603 void FileSystemContext::DidOpenFileSystemForResolveURL( | |
| 604 const FileSystemURL& url, | |
| 605 const FileSystemContext::ResolveURLCallback& callback, | |
| 606 const GURL& filesystem_root, | |
| 607 const std::string& filesystem_name, | |
| 608 base::File::Error error) { | |
| 609 DCHECK(io_task_runner_->RunsTasksOnCurrentThread()); | |
| 610 | |
| 611 if (error != base::File::FILE_OK) { | |
| 612 callback.Run(error, FileSystemInfo(), base::FilePath(), | |
| 613 FileSystemContext::RESOLVED_ENTRY_NOT_FOUND); | |
| 614 return; | |
| 615 } | |
| 616 | |
| 617 storage::FileSystemInfo info( | |
| 618 filesystem_name, filesystem_root, url.mount_type()); | |
| 619 | |
| 620 // Extract the virtual path not containing a filesystem type part from |url|. | |
| 621 base::FilePath parent = CrackURL(filesystem_root).virtual_path(); | |
| 622 base::FilePath child = url.virtual_path(); | |
| 623 base::FilePath path; | |
| 624 | |
| 625 if (parent.empty()) { | |
| 626 path = child; | |
| 627 } else if (parent != child) { | |
| 628 bool result = parent.AppendRelativePath(child, &path); | |
| 629 DCHECK(result); | |
| 630 } | |
| 631 | |
| 632 operation_runner()->GetMetadata( | |
| 633 url, base::Bind(&DidGetMetadataForResolveURL, path, callback, info)); | |
| 634 } | |
| 635 | |
| 636 } // namespace storage | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 539143002:
Migrate webkit/browser/ to storage/browser/ (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master