1 files changed, 121 insertions, 0 deletions
diff --git a/backends/cloud/googledrive/googledrivetokenrefresher.cpp b/backends/cloud/googledrive/googledrivetokenrefresher.cpp
new file mode 100644
index 0000000000..3fae830105
--- /dev/null
+++ b/backends/cloud/googledrive/googledrivetokenrefresher.cpp
@@ -0,0 +1,121 @@
+/* ScummVM - Graphic Adventure Engine
+*
+* ScummVM is the legal property of its developers, whose names
+* are too numerous to list here. Please refer to the COPYRIGHT
+* file distributed with this source distribution.
+*
+* This program is free software; you can redistribute it and/or
+* modify it under the terms of the GNU General Public License
+* as published by the Free Software Foundation; either version 2
+* of the License, or (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+*
+*/
+#define FORBIDDEN_SYMBOL_ALLOW_ALL
+
+#include "backends/cloud/googledrive/googledrivetokenrefresher.h"
+#include "backends/cloud/googledrive/googledrivestorage.h"
+#include "backends/networking/curl/networkreadstream.h"
+#include "common/debug.h"
+#include "common/json.h"
+#include <curl/curl.h>
+
+namespace Cloud {
+namespace GoogleDrive {
+
+GoogleDriveTokenRefresher::GoogleDriveTokenRefresher(GoogleDriveStorage *parent, Networking::JsonCallback callback, Networking::ErrorCallback ecb, const char *url):
+	CurlJsonRequest(callback, ecb, url), _parentStorage(parent) {}
+
+GoogleDriveTokenRefresher::~GoogleDriveTokenRefresher() {}
+
+void GoogleDriveTokenRefresher::tokenRefreshed(Storage::BoolResponse response) {
+	if (!response.value) {
+		//failed to refresh token, notify user with NULL in original callback
+		warning("GoogleDriveTokenRefresher: failed to refresh token");
+		finishError(Networking::ErrorResponse(this, false, true, "", -1));
+		return;
+	}
+
+	//update headers: first change header with token, then pass those to request
+	for (uint32 i = 0; i < _headers.size(); ++i) {
+		if (_headers[i].contains("Authorization")) {
+			_headers[i] = "Authorization: Bearer " + _parentStorage->accessToken();
+		}
+	}
+	setHeaders(_headers);
+
+	//successfully received refreshed token, can restart the original request now	
+	retry(0);
+}
+
+void GoogleDriveTokenRefresher::finishSuccess(Common::JSONValue *json) {
+	if (!json) {
+		//that's probably not an error (200 OK)
+		CurlJsonRequest::finishSuccess(nullptr);
+		return;
+	}
+
+	Common::JSONObject result = json->asObject();
+	if (result.contains("error")) {
+		//new token needed => request token & then retry original request		
+		if (_stream) {
+			debug("code %ld", _stream->httpResponseCode());
+		}
+
+		Common::JSONObject error = result.getVal("error")->asObject();
+		bool irrecoverable = true;		
+
+		uint32 code = -1;
+		Common::String message;
+		if (error.contains("code") && error.getVal("code")->isIntegerNumber()) {
+			code = error.getVal("code")->asIntegerNumber();
+			debug("code = %u", code);
+		}
+
+		if (error.contains("message")) {
+			message = error.getVal("message")->asString();
+			debug("message = %s", message.c_str());
+		}
+
+		if (code == 401 || message == "Invalid Credentials")
+			irrecoverable = false;
+
+		if (irrecoverable) {			
+			finishError(Networking::ErrorResponse(this, false, true, json->stringify(true), -1)); //TODO: httpCode
+			delete json;
+			return;
+		}
+
+		pause();		
+		delete json;
+		_parentStorage->getAccessToken(new Common::Callback<GoogleDriveTokenRefresher, Storage::BoolResponse>(this, &GoogleDriveTokenRefresher::tokenRefreshed));
+		return;
+	}
+
+	//notify user of success
+	CurlJsonRequest::finishSuccess(json);
+}
+
+void GoogleDriveTokenRefresher::setHeaders(Common::Array<Common::String> &headers) {	
+	_headers = headers;
+	curl_slist_free_all(_headersList);
+	_headersList = 0;
+	for (uint32 i = 0; i < headers.size(); ++i)
+		CurlJsonRequest::addHeader(headers[i]);
+}
+
+void GoogleDriveTokenRefresher::addHeader(Common::String header) {
+	_headers.push_back(header);
+	CurlJsonRequest::addHeader(header);
+}
+
+} // End of namespace GoogleDrive
+} // End of namespace Cloud