From 6b94732bdfdc59836968240e0f4682b964a5253a Mon Sep 17 00:00:00 2001
From: ringmaster <epithet@gmail.com>
Date: Sat, 24 May 2014 09:18:24 -0400
Subject: [PATCH] Respect locked files, surface correct exception.

---
 .../connector/sabre/exception/filelocked.php  | 28 +++++++++++++++++++
 lib/private/connector/sabre/file.php          | 21 ++++++++++----
 2 files changed, 43 insertions(+), 6 deletions(-)
 create mode 100644 lib/private/connector/sabre/exception/filelocked.php

diff --git a/lib/private/connector/sabre/exception/filelocked.php b/lib/private/connector/sabre/exception/filelocked.php
new file mode 100644
index 00000000000..c00fd783529
--- /dev/null
+++ b/lib/private/connector/sabre/exception/filelocked.php
@@ -0,0 +1,28 @@
+<?php
+/**
+ * ownCloud
+ *
+ * @author Owen Winkler
+ * @copyright 2013 Owen Winkler <owen@owncloud.com>
+ *
+ */
+
+class OC_Connector_Sabre_Exception_FileLocked extends Sabre_DAV_Exception {
+
+	public function __construct($message = "", $code = 0, Exception $previous = null) {
+		if($previous instanceof \OCP\Files\LockNotAcquiredException) {
+			$message = sprintf('Target file %s is locked by another process. %s', $previous->path, $previous->getMessage());
+		}
+		parent::__construct($message, $code, $previous);
+	}
+
+	/**
+	 * Returns the HTTP statuscode for this exception
+	 *
+	 * @return int
+	 */
+	public function getHTTPCode() {
+
+		return 503;
+	}
+}
diff --git a/lib/private/connector/sabre/file.php b/lib/private/connector/sabre/file.php
index 8a16ba55e7a..fc57c82624e 100644
--- a/lib/private/connector/sabre/file.php
+++ b/lib/private/connector/sabre/file.php
@@ -97,15 +97,24 @@ class OC_Connector_Sabre_File extends OC_Connector_Sabre_Node implements Sabre_D
 			// the path for the file was not valid
 			// TODO: find proper http status code for this case
 			throw new Sabre_DAV_Exception_Forbidden($e->getMessage());
+		} catch (\OCP\Files\LockNotAcquiredException $e) {
+			// the file is currently being written to by another process
+			throw new OC_Connector_Sabre_Exception_FileLocked(sprintf('Target file %s is locked by another process. %s', $e->path, $e->getMessage()), $e->getCode(), $e);
 		}
 
 		// rename to correct path
-		$renameOkay = $this->fileView->rename($partpath, $this->path);
-		$fileExists = $this->fileView->file_exists($this->path);
-		if ($renameOkay === false || $fileExists === false) {
-			\OC_Log::write('webdav', '\OC\Files\Filesystem::rename() failed', \OC_Log::ERROR);
-			$this->fileView->unlink($partpath);
-			throw new Sabre_DAV_Exception('Could not rename part file to final file');
+		try {
+			$renameOkay = $this->fileView->rename($partpath, $this->path);
+			$fileExists = $this->fileView->file_exists($this->path);
+			if ($renameOkay === false || $fileExists === false) {
+				\OC_Log::write('webdav', '\OC\Files\Filesystem::rename() failed', \OC_Log::ERROR);
+				$this->fileView->unlink($partpath);
+				throw new Sabre_DAV_Exception('Could not rename part file to final file');
+			}
+		}
+		catch (\OCP\Files\LockNotAcquiredException $e) {
+			// the file is currently being written to by another process
+			throw new OC_Connector_Sabre_Exception_FileLocked($e->getMessage(), $e->getCode(), $e);
 		}
 
 		// allow sync clients to send the mtime along in a header
-- 
2.39.5