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authorRaghu Nayyar <f2010658@goa.bits-pilani.ac.in>2016-08-28 10:30:16 +0200
committerGitHub <noreply@github.com>2016-08-28 10:30:16 +0200
commit9dc23592c3e7fce57777fd538dde8dbb0846eecd (patch)
tree90d4eb84cb1a4765adb254235eb9049fb87bbe1c /lib
parenteced19a8f9721b419ba09f4f6d6e744b2f7f1ed2 (diff)
parent0517f41b3f6c64cfe533c1ed0ebb221370f5d026 (diff)
downloadnextcloud-server-9dc23592c3e7fce57777fd538dde8dbb0846eecd.tar.gz
nextcloud-server-9dc23592c3e7fce57777fd538dde8dbb0846eecd.zip
Merge pull request #1105 from nextcloud/usermenu-ordering
fix ordering of user menu entries
Diffstat (limited to 'lib')
-rw-r--r--lib/private/legacy/app.php6
1 files changed, 3 insertions, 3 deletions
diff --git a/lib/private/legacy/app.php b/lib/private/legacy/app.php
index 955173fe176..0593f440eb0 100644
--- a/lib/private/legacy/app.php
+++ b/lib/private/legacy/app.php
@@ -443,7 +443,7 @@ class OC_App {
$settings = array(
array(
"id" => "help",
- "order" => 1000,
+ "order" => 4,
"href" => $urlGenerator->linkToRoute('settings_help'),
"name" => $l->t("Help"),
"icon" => $urlGenerator->imagePath("settings", "help.svg")
@@ -472,7 +472,7 @@ class OC_App {
// admin users menu
$settings[] = array(
"id" => "core_users",
- "order" => 2,
+ "order" => 3,
"href" => $urlGenerator->linkToRoute('settings_users'),
"name" => $l->t("Users"),
"icon" => $urlGenerator->imagePath("settings", "users.svg")
@@ -484,7 +484,7 @@ class OC_App {
// admin settings
$settings[] = array(
"id" => "admin",
- "order" => 1000,
+ "order" => 2,
"href" => $urlGenerator->linkToRoute('settings.AdminSettings.index'),
"name" => $l->t("Admin"),
"icon" => $urlGenerator->imagePath("settings", "admin.svg")
ref='#n183'>183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632
<?php
/**
 * @copyright Copyright (c) 2016, ownCloud, Inc.
 *
 * @author Bart Visscher <bartv@thisnet.nl>
 * @author Björn Schießle <bjoern@schiessle.org>
 * @author Jakob Sack <mail@jakobsack.de>
 * @author Joas Schilling <coding@schilljs.com>
 * @author Jörn Friedrich Dreyer <jfd@butonic.de>
 * @author Lukas Reschke <lukas@statuscode.ch>
 * @author Morris Jobke <hey@morrisjobke.de>
 * @author Owen Winkler <a_github@midnightcircus.com>
 * @author Robin Appelman <robin@icewind.nl>
 * @author Roeland Jago Douma <roeland@famdouma.nl>
 * @author Semih Serhat Karakaya <karakayasemi@itu.edu.tr>
 * @author Stefan Schneider <stefan.schneider@squareweave.com.au>
 * @author Thomas Müller <thomas.mueller@tmit.eu>
 * @author Vincent Petry <pvince81@owncloud.com>
 * @author Vinicius Cubas Brand <vinicius@eita.org.br>
 *
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License, version 3,
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 */

namespace OCA\DAV\Connector\Sabre;

use Icewind\Streams\CallbackWrapper;
use OC\AppFramework\Http\Request;
use OC\Files\Filesystem;
use OC\Files\View;
use OCA\DAV\Connector\Sabre\Exception\EntityTooLarge;
use OCA\DAV\Connector\Sabre\Exception\FileLocked;
use OCA\DAV\Connector\Sabre\Exception\Forbidden as DAVForbiddenException;
use OCA\DAV\Connector\Sabre\Exception\UnsupportedMediaType;
use OCP\Encryption\Exceptions\GenericEncryptionException;
use OCP\Files\EntityTooLargeException;
use OCP\Files\FileInfo;
use OCP\Files\ForbiddenException;
use OCP\Files\InvalidContentException;
use OCP\Files\InvalidPathException;
use OCP\Files\LockNotAcquiredException;
use OCP\Files\NotFoundException;
use OCP\Files\NotPermittedException;
use OCP\Files\Storage;
use OCP\Files\StorageNotAvailableException;
use OCP\Lock\ILockingProvider;
use OCP\Lock\LockedException;
use OCP\Share\IManager;
use Sabre\DAV\Exception;
use Sabre\DAV\Exception\BadRequest;
use Sabre\DAV\Exception\Forbidden;
use Sabre\DAV\Exception\NotImplemented;
use Sabre\DAV\Exception\ServiceUnavailable;
use Sabre\DAV\IFile;
use Sabre\DAV\Exception\NotFound;

class File extends Node implements IFile {

	protected $request;

	/**
	 * Sets up the node, expects a full path name
	 *
	 * @param \OC\Files\View $view
	 * @param \OCP\Files\FileInfo $info
	 * @param \OCP\Share\IManager $shareManager
	 * @param \OC\AppFramework\Http\Request $request
	 */
	public function __construct(View $view, FileInfo $info, IManager $shareManager = null, Request $request = null) {
		parent::__construct($view, $info, $shareManager);

		if (isset($request)) {
			$this->request = $request;
		} else {
			$this->request = \OC::$server->getRequest();
		}
	}

	/**
	 * Updates the data
	 *
	 * The data argument is a readable stream resource.
	 *
	 * After a successful put operation, you may choose to return an ETag. The
	 * etag must always be surrounded by double-quotes. These quotes must
	 * appear in the actual string you're returning.
	 *
	 * Clients may use the ETag from a PUT request to later on make sure that
	 * when they update the file, the contents haven't changed in the mean
	 * time.
	 *
	 * If you don't plan to store the file byte-by-byte, and you return a
	 * different object on a subsequent GET you are strongly recommended to not
	 * return an ETag, and just return null.
	 *
	 * @param resource $data
	 *
	 * @throws Forbidden
	 * @throws UnsupportedMediaType
	 * @throws BadRequest
	 * @throws Exception
	 * @throws EntityTooLarge
	 * @throws ServiceUnavailable
	 * @throws FileLocked
	 * @return string|null
	 */
	public function put($data) {
		try {
			$exists = $this->fileView->file_exists($this->path);
			if ($this->info && $exists && !$this->info->isUpdateable()) {
				throw new Forbidden();
			}
		} catch (StorageNotAvailableException $e) {
			throw new ServiceUnavailable("File is not updatable: " . $e->getMessage());
		}

		// verify path of the target
		$this->verifyPath();

		// chunked handling
		if (isset($_SERVER['HTTP_OC_CHUNKED'])) {
			try {
				return $this->createFileChunked($data);
			} catch (\Exception $e) {
				$this->convertToSabreException($e);
			}
		}

		/** @var Storage $partStorage */
		list($partStorage) = $this->fileView->resolvePath($this->path);
		$needsPartFile = $partStorage->needsPartFile() && (strlen($this->path) > 1);

		$view = \OC\Files\Filesystem::getView();

		if ($needsPartFile) {
			// mark file as partial while uploading (ignored by the scanner)
			$partFilePath = $this->getPartFileBasePath($this->path) . '.ocTransferId' . rand() . '.part';
		} else {
			// upload file directly as the final path
			$partFilePath = $this->path;

			if ($view && !$this->emitPreHooks($exists)) {
				throw new Exception('Could not write to final file, canceled by hook');
			}
		}

		// the part file and target file might be on a different storage in case of a single file storage (e.g. single file share)
		/** @var \OC\Files\Storage\Storage $partStorage */
		list($partStorage, $internalPartPath) = $this->fileView->resolvePath($partFilePath);
		/** @var \OC\Files\Storage\Storage $storage */
		list($storage, $internalPath) = $this->fileView->resolvePath($this->path);
		try {
			if (!$needsPartFile) {
				$this->changeLock(ILockingProvider::LOCK_EXCLUSIVE);
			}

			if ($partStorage->instanceOfStorage(Storage\IWriteStreamStorage::class)) {

				if (!is_resource($data)) {
					$data = fopen('php://temp', 'r+');
					fwrite($data, 'foobar');
					rewind($data);
				}

				$isEOF = false;
				$wrappedData = CallbackWrapper::wrap($data, null, null, null, null, function($stream) use (&$isEOF) {
					$isEOF = feof($stream);
				});

				$count = $partStorage->writeStream($internalPartPath, $wrappedData);
				$result = $count > 0;

				if ($result === false) {
					$result = $isEOF;
					if (is_resource($wrappedData)) {
						$result = feof($wrappedData);
					}
				}

			} else {
				$target = $partStorage->fopen($internalPartPath, 'wb');
				if ($target === false) {
					\OC::$server->getLogger()->error('\OC\Files\Filesystem::fopen() failed', ['app' => 'webdav']);
					// because we have no clue about the cause we can only throw back a 500/Internal Server Error
					throw new Exception('Could not write file contents');
				}
				list($count, $result) = \OC_Helper::streamCopy($data, $target);
				fclose($target);
			}

			if ($result === false) {
				$expected = -1;
				if (isset($_SERVER['CONTENT_LENGTH'])) {
					$expected = $_SERVER['CONTENT_LENGTH'];
				}
				throw new Exception('Error while copying file to target location (copied bytes: ' . $count . ', expected filesize: ' . $expected . ' )');
			}

			// if content length is sent by client:
			// double check if the file was fully received
			// compare expected and actual size
			if (isset($_SERVER['CONTENT_LENGTH']) && $_SERVER['REQUEST_METHOD'] === 'PUT') {
				$expected = (int)$_SERVER['CONTENT_LENGTH'];
				if ($count !== $expected) {
					throw new BadRequest('expected filesize ' . $expected . ' got ' . $count);
				}
			}

		} catch (\Exception $e) {
			\OC::$server->getLogger()->logException($e);
			if ($needsPartFile) {
				$partStorage->unlink($internalPartPath);
			}
			$this->convertToSabreException($e);
		}

		try {
			if ($needsPartFile) {
				if ($view && !$this->emitPreHooks($exists)) {
					$partStorage->unlink($internalPartPath);
					throw new Exception('Could not rename part file to final file, canceled by hook');
				}
				try {
					$this->changeLock(ILockingProvider::LOCK_EXCLUSIVE);
				} catch (LockedException $e) {
					if ($needsPartFile) {
						$partStorage->unlink($internalPartPath);
					}
					throw new FileLocked($e->getMessage(), $e->getCode(), $e);
				}

				// rename to correct path
				try {
					$renameOkay = $storage->moveFromStorage($partStorage, $internalPartPath, $internalPath);
					$fileExists = $storage->file_exists($internalPath);
					if ($renameOkay === false || $fileExists === false) {
						\OC::$server->getLogger()->error('renaming part file to final file failed $renameOkay: ' . ($renameOkay ? 'true' : 'false') . ', $fileExists: ' . ($fileExists ? 'true' : 'false') . ')', ['app' => 'webdav']);
						throw new Exception('Could not rename part file to final file');
					}
				} catch (ForbiddenException $ex) {
					throw new DAVForbiddenException($ex->getMessage(), $ex->getRetry());
				} catch (\Exception $e) {
					$partStorage->unlink($internalPartPath);
					$this->convertToSabreException($e);
				}
			}

			// since we skipped the view we need to scan and emit the hooks ourselves
			$storage->getUpdater()->update($internalPath);

			try {
				$this->changeLock(ILockingProvider::LOCK_SHARED);
			} catch (LockedException $e) {
				throw new FileLocked($e->getMessage(), $e->getCode(), $e);
			}

			// allow sync clients to send the mtime along in a header
			if (isset($this->request->server['HTTP_X_OC_MTIME'])) {
				$mtime = $this->sanitizeMtime($this->request->server['HTTP_X_OC_MTIME']);
				if ($this->fileView->touch($this->path, $mtime)) {
					$this->header('X-OC-MTime: accepted');
				}
			}

			if ($view) {
				$this->emitPostHooks($exists);
			}

			$this->refreshInfo();

			if (isset($this->request->server['HTTP_OC_CHECKSUM'])) {
				$checksum = trim($this->request->server['HTTP_OC_CHECKSUM']);
				$this->fileView->putFileInfo($this->path, ['checksum' => $checksum]);
				$this->refreshInfo();
			} else if ($this->getChecksum() !== null && $this->getChecksum() !== '') {
				$this->fileView->putFileInfo($this->path, ['checksum' => '']);
				$this->refreshInfo();
			}

		} catch (StorageNotAvailableException $e) {
			throw new ServiceUnavailable("Failed to check file size: " . $e->getMessage());
		}

		return '"' . $this->info->getEtag() . '"';
	}

	private function getPartFileBasePath($path) {
		$partFileInStorage = \OC::$server->getConfig()->getSystemValue('part_file_in_storage', true);
		if ($partFileInStorage) {
			return $path;
		} else {
			return md5($path); // will place it in the root of the view with a unique name
		}
	}

	/**
	 * @param string $path
	 */
	private function emitPreHooks($exists, $path = null) {
		if (is_null($path)) {
			$path = $this->path;
		}
		$hookPath = Filesystem::getView()->getRelativePath($this->fileView->getAbsolutePath($path));
		$run = true;

		if (!$exists) {
			\OC_Hook::emit(\OC\Files\Filesystem::CLASSNAME, \OC\Files\Filesystem::signal_create, array(
				\OC\Files\Filesystem::signal_param_path => $hookPath,
				\OC\Files\Filesystem::signal_param_run => &$run,
			));
		} else {
			\OC_Hook::emit(\OC\Files\Filesystem::CLASSNAME, \OC\Files\Filesystem::signal_update, array(
				\OC\Files\Filesystem::signal_param_path => $hookPath,
				\OC\Files\Filesystem::signal_param_run => &$run,
			));
		}
		\OC_Hook::emit(\OC\Files\Filesystem::CLASSNAME, \OC\Files\Filesystem::signal_write, array(
			\OC\Files\Filesystem::signal_param_path => $hookPath,
			\OC\Files\Filesystem::signal_param_run => &$run,
		));
		return $run;
	}

	/**
	 * @param string $path
	 */
	private function emitPostHooks($exists, $path = null) {
		if (is_null($path)) {
			$path = $this->path;
		}
		$hookPath = Filesystem::getView()->getRelativePath($this->fileView->getAbsolutePath($path));
		if (!$exists) {
			\OC_Hook::emit(\OC\Files\Filesystem::CLASSNAME, \OC\Files\Filesystem::signal_post_create, array(
				\OC\Files\Filesystem::signal_param_path => $hookPath
			));
		} else {
			\OC_Hook::emit(\OC\Files\Filesystem::CLASSNAME, \OC\Files\Filesystem::signal_post_update, array(
				\OC\Files\Filesystem::signal_param_path => $hookPath
			));
		}
		\OC_Hook::emit(\OC\Files\Filesystem::CLASSNAME, \OC\Files\Filesystem::signal_post_write, array(
			\OC\Files\Filesystem::signal_param_path => $hookPath
		));
	}

	/**
	 * Returns the data
	 *
	 * @return resource
	 * @throws Forbidden
	 * @throws ServiceUnavailable
	 */
	public function get() {
		//throw exception if encryption is disabled but files are still encrypted
		try {
			if (!$this->info->isReadable()) {
				// do a if the file did not exist
				throw new NotFound();
			}
			try {
				$res = $this->fileView->fopen(ltrim($this->path, '/'), 'rb');
			} catch (\Exception $e) {
				$this->convertToSabreException($e);
			}
			if ($res === false) {
				throw new ServiceUnavailable("Could not open file");
			}
			return $res;
		} catch (GenericEncryptionException $e) {
			// returning 503 will allow retry of the operation at a later point in time
			throw new ServiceUnavailable("Encryption not ready: " . $e->getMessage());
		} catch (StorageNotAvailableException $e) {
			throw new ServiceUnavailable("Failed to open file: " . $e->getMessage());
		} catch (ForbiddenException $ex) {
			throw new DAVForbiddenException($ex->getMessage(), $ex->getRetry());
		} catch (LockedException $e) {
			throw new FileLocked($e->getMessage(), $e->getCode(), $e);
		}
	}

	/**
	 * Delete the current file
	 *
	 * @throws Forbidden
	 * @throws ServiceUnavailable
	 */
	public function delete() {
		if (!$this->info->isDeletable()) {
			throw new Forbidden();
		}

		try {
			if (!$this->fileView->unlink($this->path)) {
				// assume it wasn't possible to delete due to permissions
				throw new Forbidden();
			}
		} catch (StorageNotAvailableException $e) {
			throw new ServiceUnavailable("Failed to unlink: " . $e->getMessage());
		} catch (ForbiddenException $ex) {
			throw new DAVForbiddenException($ex->getMessage(), $ex->getRetry());
		} catch (LockedException $e) {
			throw new FileLocked($e->getMessage(), $e->getCode(), $e);
		}
	}

	/**
	 * Returns the mime-type for a file
	 *
	 * If null is returned, we'll assume application/octet-stream
	 *
	 * @return string
	 */
	public function getContentType() {
		$mimeType = $this->info->getMimetype();

		// PROPFIND needs to return the correct mime type, for consistency with the web UI
		if (isset($_SERVER['REQUEST_METHOD']) && $_SERVER['REQUEST_METHOD'] === 'PROPFIND') {
			return $mimeType;
		}
		return \OC::$server->getMimeTypeDetector()->getSecureMimeType($mimeType);
	}

	/**
	 * @return array|false
	 */
	public function getDirectDownload() {
		if (\OCP\App::isEnabled('encryption')) {
			return [];
		}
		/** @var \OCP\Files\Storage $storage */
		list($storage, $internalPath) = $this->fileView->resolvePath($this->path);
		if (is_null($storage)) {
			return [];
		}

		return $storage->getDirectDownload($internalPath);
	}

	/**
	 * @param resource $data
	 * @return null|string
	 * @throws Exception
	 * @throws BadRequest
	 * @throws NotImplemented
	 * @throws ServiceUnavailable
	 */
	private function createFileChunked($data) {
		list($path, $name) = \Sabre\Uri\split($this->path);

		$info = \OC_FileChunking::decodeName($name);
		if (empty($info)) {
			throw new NotImplemented('Invalid chunk name');
		}

		$chunk_handler = new \OC_FileChunking($info);
		$bytesWritten = $chunk_handler->store($info['index'], $data);

		//detect aborted upload
		if (isset ($_SERVER['REQUEST_METHOD']) && $_SERVER['REQUEST_METHOD'] === 'PUT') {
			if (isset($_SERVER['CONTENT_LENGTH'])) {
				$expected = (int)$_SERVER['CONTENT_LENGTH'];
				if ($bytesWritten !== $expected) {
					$chunk_handler->remove($info['index']);
					throw new BadRequest(
						'expected filesize ' . $expected . ' got ' . $bytesWritten);
				}
			}
		}

		if ($chunk_handler->isComplete()) {
			/** @var Storage $storage */
			list($storage,) = $this->fileView->resolvePath($path);
			$needsPartFile = $storage->needsPartFile();
			$partFile = null;

			$targetPath = $path . '/' . $info['name'];
			/** @var \OC\Files\Storage\Storage $targetStorage */
			list($targetStorage, $targetInternalPath) = $this->fileView->resolvePath($targetPath);

			$exists = $this->fileView->file_exists($targetPath);

			try {
				$this->fileView->lockFile($targetPath, ILockingProvider::LOCK_SHARED);

				$this->emitPreHooks($exists, $targetPath);
				$this->fileView->changeLock($targetPath, ILockingProvider::LOCK_EXCLUSIVE);
				/** @var \OC\Files\Storage\Storage $targetStorage */
				list($targetStorage, $targetInternalPath) = $this->fileView->resolvePath($targetPath);

				if ($needsPartFile) {
					// we first assembly the target file as a part file
					$partFile = $this->getPartFileBasePath($path . '/' . $info['name']) . '.ocTransferId' . $info['transferid'] . '.part';
					/** @var \OC\Files\Storage\Storage $targetStorage */
					list($partStorage, $partInternalPath) = $this->fileView->resolvePath($partFile);


					$chunk_handler->file_assemble($partStorage, $partInternalPath);

					// here is the final atomic rename
					$renameOkay = $targetStorage->moveFromStorage($partStorage, $partInternalPath, $targetInternalPath);
					$fileExists = $targetStorage->file_exists($targetInternalPath);
					if ($renameOkay === false || $fileExists === false) {
						\OC::$server->getLogger()->error('\OC\Files\Filesystem::rename() failed', ['app' => 'webdav']);
						// only delete if an error occurred and the target file was already created
						if ($fileExists) {
							// set to null to avoid double-deletion when handling exception
							// stray part file
							$partFile = null;
							$targetStorage->unlink($targetInternalPath);
						}
						$this->fileView->changeLock($targetPath, ILockingProvider::LOCK_SHARED);
						throw new Exception('Could not rename part file assembled from chunks');
					}
				} else {
					// assemble directly into the final file
					$chunk_handler->file_assemble($targetStorage, $targetInternalPath);
				}

				// allow sync clients to send the mtime along in a header
				if (isset($this->request->server['HTTP_X_OC_MTIME'])) {
					$mtime = $this->sanitizeMtime($this->request->server['HTTP_X_OC_MTIME']);
					if ($targetStorage->touch($targetInternalPath, $mtime)) {
						$this->header('X-OC-MTime: accepted');
					}
				}

				// since we skipped the view we need to scan and emit the hooks ourselves
				$targetStorage->getUpdater()->update($targetInternalPath);

				$this->fileView->changeLock($targetPath, ILockingProvider::LOCK_SHARED);

				$this->emitPostHooks($exists, $targetPath);

				// FIXME: should call refreshInfo but can't because $this->path is not the of the final file
				$info = $this->fileView->getFileInfo($targetPath);

				if (isset($this->request->server['HTTP_OC_CHECKSUM'])) {
					$checksum = trim($this->request->server['HTTP_OC_CHECKSUM']);
					$this->fileView->putFileInfo($targetPath, ['checksum' => $checksum]);
				} else if ($info->getChecksum() !== null && $info->getChecksum() !== '') {
					$this->fileView->putFileInfo($this->path, ['checksum' => '']);
				}

				$this->fileView->unlockFile($targetPath, ILockingProvider::LOCK_SHARED);

				return $info->getEtag();
			} catch (\Exception $e) {
				if ($partFile !== null) {
					$targetStorage->unlink($targetInternalPath);
				}
				$this->convertToSabreException($e);
			}
		}

		return null;
	}

	/**
	 * Convert the given exception to a SabreException instance
	 *
	 * @param \Exception $e
	 *
	 * @throws \Sabre\DAV\Exception
	 */
	private function convertToSabreException(\Exception $e) {
		if ($e instanceof \Sabre\DAV\Exception) {
			throw $e;
		}
		if ($e instanceof NotPermittedException) {
			// a more general case - due to whatever reason the content could not be written
			throw new Forbidden($e->getMessage(), 0, $e);
		}
		if ($e instanceof ForbiddenException) {
			// the path for the file was forbidden
			throw new DAVForbiddenException($e->getMessage(), $e->getRetry(), $e);
		}
		if ($e instanceof EntityTooLargeException) {
			// the file is too big to be stored
			throw new EntityTooLarge($e->getMessage(), 0, $e);
		}
		if ($e instanceof InvalidContentException) {
			// the file content is not permitted
			throw new UnsupportedMediaType($e->getMessage(), 0, $e);
		}
		if ($e instanceof InvalidPathException) {
			// the path for the file was not valid
			// TODO: find proper http status code for this case
			throw new Forbidden($e->getMessage(), 0, $e);
		}
		if ($e instanceof LockedException || $e instanceof LockNotAcquiredException) {
			// the file is currently being written to by another process
			throw new FileLocked($e->getMessage(), $e->getCode(), $e);
		}
		if ($e instanceof GenericEncryptionException) {
			// returning 503 will allow retry of the operation at a later point in time
			throw new ServiceUnavailable('Encryption not ready: ' . $e->getMessage(), 0, $e);
		}
		if ($e instanceof StorageNotAvailableException) {
			throw new ServiceUnavailable('Failed to write file contents: ' . $e->getMessage(), 0, $e);
		}
		if ($e instanceof NotFoundException) {
			throw new NotFound('File not found: ' . $e->getMessage(), 0, $e);
		}

		throw new \Sabre\DAV\Exception($e->getMessage(), 0, $e);
	}

	/**
	 * Get the checksum for this file
	 *
	 * @return string
	 */
	public function getChecksum() {
		return $this->info->getChecksum();
	}

	protected function header($string) {
		\header($string);
	}
}