From 3a0a33b4c2399415c3def375ab7ba0c737d16620 Mon Sep 17 00:00:00 2001
From: Vincent Petry <pvince81@owncloud.com>
Date: Thu, 14 Jan 2016 17:52:30 +0100
Subject: [PATCH] Use Guzzle stream to download files from GDrive

The API library does not support streaming and always reads the full
file into memory.

This workaround copies the signed headers to a Guzzle request and
returns the response as stream.
---
 apps/files_external/lib/google.php | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/apps/files_external/lib/google.php b/apps/files_external/lib/google.php
index eba2ee7f9b58..d0734aa98e97 100644
--- a/apps/files_external/lib/google.php
+++ b/apps/files_external/lib/google.php
@@ -426,13 +426,23 @@ public function fopen($path, $mode) {
 					}
 					if (isset($downloadUrl)) {
 						$request = new \Google_Http_Request($downloadUrl, 'GET', null, null);
-						$httpRequest = $this->client->getAuth()->authenticatedRequest($request);
-						if ($httpRequest->getResponseHttpCode() == 200) {
-							$tmpFile = \OCP\Files::tmpFile($ext);
-							$data = $httpRequest->getResponseBody();
-							file_put_contents($tmpFile, $data);
-							return fopen($tmpFile, $mode);
+						$httpRequest = $this->client->getAuth()->sign($request);
+						// the library's service doesn't support streaming, so we use Guzzle instead
+						$client = \OC::$server->getHTTPClientService()->newClient();
+						try {
+							$response = $client->get($downloadUrl, [
+								'headers' => $httpRequest->getRequestHeaders(),
+								'stream' => true
+							]);
+						} catch (RequestException $e) {
+							if ($e->getResponse()->getStatusCode() === 404) {
+								return false;
+							} else {
+								throw $e;
+							}
 						}
+
+						return $response->getBody();
 					}
 				}
 				return false;