Merge pull request #25747 from nextcloud/XAccelBuffering

Add X-Accel-Buffering header to downloads

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

@@ -291,6 +291,7 @@ class FilesPlugin extends ServerPlugin {
 				$response->addHeader('OC-Checksum', $checksum);
 			}
 		}
+		$response->addHeader('X-Accel-Buffering', 'no');
 	}
 
 	/**

apps/dav/tests/unit/Connector/Sabre/FilesPluginTest.php

@@ -590,9 +590,12 @@ class FilesPluginTest extends TestCase {
 			->willReturn($isClumsyAgent);
 
 		$response
-			->expects($this->once())
+			->expects($this->exactly(2))
 			->method('addHeader')
-			->with('Content-Disposition', $contentDispositionHeader);
+			->withConsecutive(
+				['Content-Disposition', $contentDispositionHeader],
+				['X-Accel-Buffering', 'no']
+			);
 
 		$this->plugin->httpGet($request, $response);
 	}

lib/private/Streamer.php

@@ -95,6 +95,7 @@ class Streamer {
 	 * @param string $name
 	 */
 	public function sendHeaders($name) {
+		header('X-Accel-Buffering: no');
 		$extension = $this->streamerInstance instanceof ZipStreamer ? '.zip' : '.tar';
 		$fullName = $name . $extension;
 		$this->streamerInstance->sendHeaders($fullName);

lib/private/legacy/OC_Files.php

@@ -98,6 +98,7 @@ class OC_Files {
 			}
 		}
 		header('Content-Type: '.$type, true);
+		header('X-Accel-Buffering: no');
 	}
 
 	/**