Prevent double output of avatar image data

apps/dav/appinfo/v1/caldav.php

@@ -71,7 +71,7 @@
 
 // Add plugins
 $server->addPlugin(new MaintenancePlugin());
-$server->addPlugin(new \Sabre\DAV\Auth\Plugin($authBackend, 'ownCloud'));
+$server->addPlugin(new \Sabre\DAV\Auth\Plugin($authBackend));
 $server->addPlugin(new \Sabre\CalDAV\Plugin());
 
 $server->addPlugin(new LegacyDAVACL());

apps/dav/appinfo/v1/carddav.php

@@ -68,7 +68,7 @@
 $server->setBaseUri($baseuri);
 // Add plugins
 $server->addPlugin(new MaintenancePlugin());
-$server->addPlugin(new \Sabre\DAV\Auth\Plugin($authBackend, 'ownCloud'));
+$server->addPlugin(new \Sabre\DAV\Auth\Plugin($authBackend));
 $server->addPlugin(new Plugin());
 
 $server->addPlugin(new LegacyDAVACL());

apps/dav/lib/Avatars/AvatarNode.php

@@ -62,8 +62,9 @@ function get() {
 		ob_start();
 		if ($this->ext === 'png') {
 			imagepng($res);
+		} else {
+			imagejpeg($res);
 		}
-		imagejpeg($res);
 
 		return ob_get_clean();
 	}

apps/dav/lib/Server.php

@@ -125,7 +125,7 @@ public function __construct(IRequest $request, $baseUri) {
 		// with performance and locking issues because it will query
 		// every parent node which might trigger an implicit rescan in the
 		// case of external storages with update detection
-		if (!$this->requestIsForSubtree('files')) {
+		if (!$this->isRequestForSubtree('files')) {
 			// acl
 			$acl = new DavAclPlugin();
 			$acl->principalCollectionSet = [
@@ -136,7 +136,7 @@ public function __construct(IRequest $request, $baseUri) {
 		}
 
 		// calendar plugins
-		if ($this->requestIsForSubtree('calendars')) {
+		if ($this->isRequestForSubtree('calendars')) {
 			$mailer = \OC::$server->getMailer();
 			$this->server->addPlugin(new \OCA\DAV\CalDAV\Plugin());
 			$this->server->addPlugin(new \Sabre\CalDAV\ICSExportPlugin());
@@ -152,7 +152,8 @@ public function __construct(IRequest $request, $baseUri) {
 		}
 
 		// addressbook plugins
-		if ($this->requestIsForSubtree('addressbooks')) {
+		if ($this->isRequestForSubtree('addressbooks')) {
+			$this->server->addPlugin(new DAV\Sharing\Plugin($authBackend, \OC::$server->getRequest()));
 			$this->server->addPlugin(new \OCA\DAV\CardDAV\Plugin());
 			$this->server->addPlugin(new VCFExportPlugin());
 			$this->server->addPlugin(new ImageExportPlugin(\OC::$server->getLogger()));
@@ -280,7 +281,7 @@ public function exec() {
 	 * @param string $subTree
 	 * @return bool
 	 */
-	private function requestIsForSubtree($subTree) {
+	private function isRequestForSubtree($subTree) {
 		$subTree = trim($subTree, " /");
 		return strpos($this->server->getRequestUri(), "$subTree/") === 0;
 	}

apps/dav/tests/unit/Avatars/AvatarNodeTest.php

@@ -25,6 +25,7 @@
 
 use OCA\DAV\Avatars\AvatarNode;
 use OCP\IAvatar;
+use OCP\IImage;
 use Test\TestCase;
 
 class AvatarNodeTest extends TestCase {
@@ -45,4 +46,29 @@ public function testGetContentType() {
 		$n = new AvatarNode(1024, 'jpeg', $a);
 		$this->assertEquals('image/jpeg', $n->getContentType());
 	}
+
+	/**
+	 * @dataProvider providesFormats
+	 */
+	public function testGetOperation($realImage, $mime, $imageFunction) {
+		$image = $this->createMock(IImage::class);
+		$image->expects($this->once())->method('resource')->willReturn($realImage);
+		/** @var IAvatar | \PHPUnit_Framework_MockObject_MockObject $a */
+		$a = $this->createMock(IAvatar::class);
+		$a->expects($this->once())->method('get')->with(1024)->willReturn($image);
+		$n = new AvatarNode(1024, $mime, $a);
+
+		ob_start();
+		$imageFunction($realImage);
+
+		$expected = ob_get_clean();
+		$this->assertEquals($expected, $n->get());
+	}
+
+	public function providesFormats() {
+		return [
+			'jpeg' => [imagecreatefromjpeg(\OC::$SERVERROOT . '/tests/data/testimage.jpg'), 'jpeg', 'imagejpeg'],
+			'png' => [imagecreatefrompng(\OC::$SERVERROOT . '/tests/data/testimage.png'), 'png', 'imagepng']
+		];
+	}
 }