CLOUD: Add Storage::uploadStreamSupported()

Box uses POST multipart/form requests for uploading. Such requests could
be sent with libcurl if we either have a file available or a buffer with
this file's contents.

SavesSyncRequest was using Storage::upload(ReadStream *), which couldn't
be implemented in BoxStorage. Thus I've added a method to test whether
such upload is supported and, if it's not, SavesSyncRequest uses the
other.

1 files changed, 7 insertions, 0 deletions

diff --git a/backends/cloud/box/boxstorage.cpp b/backends/cloud/box/boxstorage.cpp
index 628d18b89a..35e86409c3 100644
--- a/backends/cloud/box/boxstorage.cpp
+++ b/backends/cloud/box/boxstorage.cpp
@@ -252,9 +252,16 @@ Networking::Request *BoxStorage::upload(Common::String remotePath, Common::Strin
 
 Networking::Request *BoxStorage::upload(Common::String path, Common::SeekableReadStream *contents, UploadCallback callback, Networking::ErrorCallback errorCallback) {
 	warning("BoxStorage::upload(ReadStream) not implemented");
+	if (errorCallback) (*errorCallback)(Networking::ErrorResponse(nullptr, false, true, "BoxStorage::upload(ReadStream) not implemented", -1));
+	delete callback;
+	delete errorCallback;
 	return nullptr;
 }
 
+bool BoxStorage::uploadStreamSupported() {
+	return false;	
+}
+
 Networking::Request *BoxStorage::streamFileById(Common::String id, Networking::NetworkReadStreamCallback callback, Networking::ErrorCallback errorCallback) {
 	if (callback) {
 		Common::String url = "https://api.box.com/2.0/files/" + id + "/content";