Merge remote-tracking branch 'upstream/master' into fix_file_move

Signed-off-by: Tomasz Grobelny <tomasz@grobelny.net>

1 files changed, 65 insertions, 0 deletions

diff --git a/lib/private/Files/Stream/CountReadStream.php b/lib/private/Files/Stream/CountReadStream.php
new file mode 100644
index 00000000000..93cadf8f214
--- /dev/null
+++ b/lib/private/Files/Stream/CountReadStream.php
@@ -0,0 +1,65 @@
+<?php declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2018 Robin Appelman <robin@icewind.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * 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
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OC\Files\Stream;
+
+use Icewind\Streams\Wrapper;
+
+class CountReadStream extends Wrapper {
+	/** @var int */
+	private $count;
+
+	/** @var callback */
+	private $callback;
+
+	public static function wrap($source, $callback) {
+		$context = stream_context_create(array(
+			'count' => array(
+				'source' => $source,
+				'callback' => $callback,
+			)
+		));
+		return Wrapper::wrapSource($source, $context, 'count', self::class);
+	}
+
+	public function dir_opendir($path, $options) {
+		return false;
+	}
+
+	public function stream_open($path, $mode, $options, &$opened_path) {
+		$context = $this->loadContext('count');
+
+		$this->callback = $context['callback'];
+		return true;
+	}
+
+	public function stream_read($count) {
+		$result = parent::stream_read($count);
+		$this->count += strlen($result);
+		return $result;
+	}
+
+	public function stream_close() {
+		$result = parent::stream_close();
+		call_user_func($this->callback, $this->count);
+		return $result;
+	}
+}