Only use quota stream wrapper on "files"

Prevent using the quota stream wrapper on trashbin folders and other
metadata folders

lib/private/files/storage/wrapper/quota.php

@@ -141,10 +141,12 @@ class Quota extends Wrapper {
 		$source = $this->storage->fopen($path, $mode);
 		$free = $this->free_space('');
 		if ($source && $free >= 0 && $mode !== 'r' && $mode !== 'rb') {
-			return \OC\Files\Stream\Quota::wrap($source, $free);
-		} else {
-			return $source;
+			// only apply quota for files, not metadata, trash or others
+			if (strpos(ltrim($path, '/'), 'files/') === 0) {
+				return \OC\Files\Stream\Quota::wrap($source, $free);
+			}
 		}
+		return $source;
 	}
 
 	/**

tests/lib/files/storage/wrapper/quota.php

@@ -35,20 +35,21 @@ class Quota extends \Test\Files\Storage\Storage {
 	 */
 	protected function getLimitedStorage($limit) {
 		$storage = new \OC\Files\Storage\Local(array('datadir' => $this->tmpDir));
+		$storage->mkdir('files');
 		$storage->getScanner()->scan('');
 		return new \OC\Files\Storage\Wrapper\Quota(array('storage' => $storage, 'quota' => $limit));
 	}
 
 	public function testFilePutContentsNotEnoughSpace() {
 		$instance = $this->getLimitedStorage(3);
-		$this->assertFalse($instance->file_put_contents('foo', 'foobar'));
+		$this->assertFalse($instance->file_put_contents('files/foo', 'foobar'));
 	}
 
 	public function testCopyNotEnoughSpace() {
 		$instance = $this->getLimitedStorage(9);
-		$this->assertEquals(6, $instance->file_put_contents('foo', 'foobar'));
+		$this->assertEquals(6, $instance->file_put_contents('files/foo', 'foobar'));
 		$instance->getScanner()->scan('');
-		$this->assertFalse($instance->copy('foo', 'bar'));
+		$this->assertFalse($instance->copy('files/foo', 'files/bar'));
 	}
 
 	public function testFreeSpace() {
@@ -92,17 +93,17 @@ class Quota extends \Test\Files\Storage\Storage {
 
 	public function testFWriteNotEnoughSpace() {
 		$instance = $this->getLimitedStorage(9);
-		$stream = $instance->fopen('foo', 'w+');
+		$stream = $instance->fopen('files/foo', 'w+');
 		$this->assertEquals(6, fwrite($stream, 'foobar'));
 		$this->assertEquals(3, fwrite($stream, 'qwerty'));
 		fclose($stream);
-		$this->assertEquals('foobarqwe', $instance->file_get_contents('foo'));
+		$this->assertEquals('foobarqwe', $instance->file_get_contents('files/foo'));
 	}
 
 	public function testStreamCopyWithEnoughSpace() {
 		$instance = $this->getLimitedStorage(16);
 		$inputStream = fopen('data://text/plain,foobarqwerty', 'r');
-		$outputStream = $instance->fopen('foo', 'w+');
+		$outputStream = $instance->fopen('files/foo', 'w+');
 		list($count, $result) = \OC_Helper::streamCopy($inputStream, $outputStream);
 		$this->assertEquals(12, $count);
 		$this->assertTrue($result);
@@ -113,7 +114,7 @@ class Quota extends \Test\Files\Storage\Storage {
 	public function testStreamCopyNotEnoughSpace() {
 		$instance = $this->getLimitedStorage(9);
 		$inputStream = fopen('data://text/plain,foobarqwerty', 'r');
-		$outputStream = $instance->fopen('foo', 'w+');
+		$outputStream = $instance->fopen('files/foo', 'w+');
 		list($count, $result) = \OC_Helper::streamCopy($inputStream, $outputStream);
 		$this->assertEquals(9, $count);
 		$this->assertFalse($result);
@@ -139,16 +140,27 @@ class Quota extends \Test\Files\Storage\Storage {
 		$instance = $this->getLimitedStorage(9);
 
 		// create test file first
-		$stream = $instance->fopen('foo', 'w+');
+		$stream = $instance->fopen('files/foo', 'w+');
 		fwrite($stream, 'blablacontent');
 		fclose($stream);
 
-		$stream = $instance->fopen('foo', 'r');
+		$stream = $instance->fopen('files/foo', 'r');
 		$meta = stream_get_meta_data($stream);
 		$this->assertEquals('plainfile', $meta['wrapper_type']);
 		fclose($stream);
 
-		$stream = $instance->fopen('foo', 'rb');
+		$stream = $instance->fopen('files/foo', 'rb');
+		$meta = stream_get_meta_data($stream);
+		$this->assertEquals('plainfile', $meta['wrapper_type']);
+		fclose($stream);
+	}
+
+	public function testReturnRegularStreamWhenOutsideFiles() {
+		$instance = $this->getLimitedStorage(9);
+		$instance->mkdir('files_other');
+
+		// create test file first
+		$stream = $instance->fopen('files_other/foo', 'w+');
 		$meta = stream_get_meta_data($stream);
 		$this->assertEquals('plainfile', $meta['wrapper_type']);
 		fclose($stream);
@@ -156,7 +168,7 @@ class Quota extends \Test\Files\Storage\Storage {
 
 	public function testReturnQuotaStreamOnWrite() {
 		$instance = $this->getLimitedStorage(9);
-		$stream = $instance->fopen('foo', 'w+');
+		$stream = $instance->fopen('files/foo', 'w+');
 		$meta = stream_get_meta_data($stream);
 		$expected_type = defined('HHVM_VERSION') ? 'File' : 'user-space';
 		$this->assertEquals($expected_type, $meta['wrapper_type']);