Initial commit

backends/cloud/dropbox/dropboxtokenrefresher.cpp

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+/* 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "backends/cloud/dropbox/dropboxtokenrefresher.h"
+#include "backends/cloud/dropbox/dropboxstorage.h"
+#include "backends/networking/http/networkreadstream.h"
+#include "common/debug.h"
+#include "common/formats/json.h"
+
+namespace Cloud {
+namespace Dropbox {
+
+DropboxTokenRefresher::DropboxTokenRefresher(DropboxStorage *parent, Networking::JsonCallback callback, Networking::ErrorCallback ecb, const char *url):
+	HttpJsonRequest(callback, ecb, url), _parentStorage(parent) {}
+
+DropboxTokenRefresher::~DropboxTokenRefresher() {}
+
+void DropboxTokenRefresher::tokenRefreshed(const Storage::BoolResponse &response) {
+	if (!response.value) {
+		//failed to refresh token, notify user with NULL in original callback
+		warning("DropboxTokenRefresher: failed to refresh token");
+		finishError(Networking::ErrorResponse(this, false, true, "DropboxTokenRefresher::tokenRefreshed: failed to refresh token", -1));
+		return;
+	}
+
+	//update headers: first change header with token, then pass those to request
+	for (uint32 i = 0; i < _headersList.size(); ++i) {
+		if (_headersList[i].contains("Authorization")) {
+			_headersList[i] = "Authorization: Bearer " + _parentStorage->accessToken();
+		}
+	}
+
+	//successfully received refreshed token, can restart the original request now
+	retry(0);
+}
+
+void DropboxTokenRefresher::finishJson(const Common::JSONValue *json) {
+	if (!json) {
+		//that's probably not an error (200 OK)
+		HttpJsonRequest::finishJson(nullptr);
+		return;
+	}
+
+	if (jsonIsObject(json, "DropboxTokenRefresher")) {
+		Common::JSONObject result = json->asObject();
+
+		if (result.contains("error") || result.contains("error_summary")) {
+			long httpCode = -1;
+			if (_stream) {
+				httpCode = _stream->httpResponseCode();
+				debug(9, "DropboxTokenRefresher: code %ld", httpCode);
+			}
+
+			bool irrecoverable = true;
+			if (jsonContainsString(result, "error_summary", "DropboxTokenRefresher")) {
+				if (result.getVal("error_summary")->asString().contains("expired_access_token")) {
+					irrecoverable = false;
+				}
+			}
+
+			if (irrecoverable) {
+				finishError(Networking::ErrorResponse(this, false, true, json->stringify(true), httpCode));
+				delete json;
+				return;
+			}
+
+			pause();
+			delete json;
+			_parentStorage->refreshAccessToken(new Common::Callback<DropboxTokenRefresher, const Storage::BoolResponse &>(this, &DropboxTokenRefresher::tokenRefreshed));
+			return;
+		}
+	}
+
+	//notify user of success
+	HttpJsonRequest::finishJson(json);
+}
+
+void DropboxTokenRefresher::finishError(const Networking::ErrorResponse &error, Networking::RequestState state) {
+	if (error.httpResponseCode == 401) {
+		pause();
+		_parentStorage->refreshAccessToken(new Common::Callback<DropboxTokenRefresher, const Storage::BoolResponse &>(this, &DropboxTokenRefresher::tokenRefreshed));
+		return;
+	}
+
+	Request::finishError(error);
+}
+
+} // End of namespace Dropbox
+} // End of namespace Cloud