Properly catch exception from writing to stream when copying a file

Signed-off-by: Julius Härtl <jus@bitgrid.net>

apps/dav/lib/Connector/Sabre/File.php

@@ -52,6 +52,7 @@ use OCP\Encryption\Exceptions\GenericEncryptionException;
 use OCP\Files\EntityTooLargeException;
 use OCP\Files\FileInfo;
 use OCP\Files\ForbiddenException;
+use OCP\Files\GenericFileException;
 use OCP\Files\InvalidContentException;
 use OCP\Files\InvalidPathException;
 use OCP\Files\LockNotAcquiredException;
@@ -200,8 +201,14 @@ class File extends Node implements IFile {
 					$isEOF = feof($stream);
 				});
 
+				$result = true;
+				$count = -1;
+				try {
 					$count = $partStorage->writeStream($internalPartPath, $wrappedData);
-				$result = $count > 0;
+				} catch (GenericFileException $e) {
+					$result = false;
+				}
+
 
 				if ($result === false) {
 					$result = $isEOF;