Initial commit

backends/cloud/googledrive/googledrivelistdirectorybyidrequest.cpp

@@ -0,0 +1,162 @@
+/* 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/googledrive/googledrivelistdirectorybyidrequest.h"
+#include "backends/cloud/googledrive/googledrivestorage.h"
+#include "backends/cloud/iso8601.h"
+#include "backends/cloud/storage.h"
+#include "backends/networking/http/connectionmanager.h"
+#include "backends/networking/http/httpjsonrequest.h"
+#include "backends/networking/http/networkreadstream.h"
+#include "common/formats/json.h"
+#include "googledrivetokenrefresher.h"
+
+namespace Cloud {
+namespace GoogleDrive {
+
+#define GOOGLEDRIVE_API_FILES "https://www.googleapis.com/drive/v3/files?spaces=drive&fields=files%28id,mimeType,modifiedTime,name,size%29,nextPageToken&orderBy=folder,name"
+//files(id,mimeType,modifiedTime,name,size),nextPageToken
+
+GoogleDriveListDirectoryByIdRequest::GoogleDriveListDirectoryByIdRequest(GoogleDriveStorage *storage, const Common::String &id, Storage::ListDirectoryCallback cb, Networking::ErrorCallback ecb):
+	Networking::Request(nullptr, ecb), _requestedId(id), _storage(storage), _listDirectoryCallback(cb),
+	_workingRequest(nullptr), _ignoreCallback(false) {
+	start();
+}
+
+GoogleDriveListDirectoryByIdRequest::~GoogleDriveListDirectoryByIdRequest() {
+	_ignoreCallback = true;
+	if (_workingRequest)
+		_workingRequest->finish();
+	delete _listDirectoryCallback;
+}
+
+void GoogleDriveListDirectoryByIdRequest::start() {
+	_ignoreCallback = true;
+	if (_workingRequest)
+		_workingRequest->finish();
+	_files.clear();
+	_ignoreCallback = false;
+
+	makeRequest("");
+}
+
+void GoogleDriveListDirectoryByIdRequest::makeRequest(const Common::String &pageToken) {
+	Common::String url = GOOGLEDRIVE_API_FILES;
+	if (pageToken != "")
+		url += "&pageToken=" + pageToken;
+	url += "&q=%27" + _requestedId + "%27+in+parents";
+
+	Networking::JsonCallback callback = new Common::Callback<GoogleDriveListDirectoryByIdRequest, const Networking::JsonResponse &>(this, &GoogleDriveListDirectoryByIdRequest::responseCallback);
+	Networking::ErrorCallback failureCallback = new Common::Callback<GoogleDriveListDirectoryByIdRequest, const Networking::ErrorResponse &>(this, &GoogleDriveListDirectoryByIdRequest::errorCallback);
+	Networking::HttpJsonRequest *request = new GoogleDriveTokenRefresher(_storage, callback, failureCallback, url.c_str());
+	request->addHeader("Authorization: Bearer " + _storage->accessToken());
+	_workingRequest = ConnMan.addRequest(request);
+}
+
+void GoogleDriveListDirectoryByIdRequest::responseCallback(const Networking::JsonResponse &response) {
+	_workingRequest = nullptr;
+	if (_ignoreCallback) {
+		delete response.value;
+		return;
+	}
+	if (response.request)
+		_date = response.request->date();
+
+	Networking::ErrorResponse error(this, "GoogleDriveListDirectoryByIdRequest::responseCallback");
+	const Networking::HttpJsonRequest *rq = (const Networking::HttpJsonRequest *)response.request;
+	if (rq && rq->getNetworkReadStream())
+		error.httpResponseCode = rq->getNetworkReadStream()->httpResponseCode();
+
+	const Common::JSONValue *json = response.value;
+	if (json) {
+		Common::JSONObject responseObject = json->asObject();
+
+		///debug("%s", json->stringify(true).c_str());
+
+		if (responseObject.contains("error") || responseObject.contains("error_summary")) {
+			warning("GoogleDrive returned error: %s", responseObject.getVal("error_summary")->asString().c_str());
+			error.failed = true;
+			error.response = json->stringify();
+			finishError(error);
+			delete json;
+			return;
+		}
+
+		//TODO: check that ALL keys exist AND HAVE RIGHT TYPE to avoid segfaults
+
+		if (responseObject.contains("files") && responseObject.getVal("files")->isArray()) {
+			Common::JSONArray items = responseObject.getVal("files")->asArray();
+			for (uint32 i = 0; i < items.size(); ++i) {
+				Common::JSONObject item = items[i]->asObject();
+				Common::String id = item.getVal("id")->asString();
+				Common::String name = item.getVal("name")->asString();
+				bool isDirectory = (item.getVal("mimeType")->asString() == "application/vnd.google-apps.folder");
+				uint32 size = 0, timestamp = 0;
+				if (item.contains("size") && item.getVal("size")->isString())
+					size = item.getVal("size")->asString().asUint64();
+				if (item.contains("modifiedTime") && item.getVal("modifiedTime")->isString())
+					timestamp = ISO8601::convertToTimestamp(item.getVal("modifiedTime")->asString());
+
+				//as we list directory by id, we can't determine full path for the file, so we leave it empty
+				_files.push_back(StorageFile(id, "", name, size, timestamp, isDirectory));
+			}
+		}
+
+		bool hasMore = (responseObject.contains("nextPageToken"));
+
+		if (hasMore) {
+			Common::String token = responseObject.getVal("nextPageToken")->asString();
+			makeRequest(token);
+		} else {
+			finishListing(_files);
+		}
+	} else {
+		warning("null, not json");
+		error.failed = true;
+		finishError(error);
+	}
+
+	delete json;
+}
+
+void GoogleDriveListDirectoryByIdRequest::errorCallback(const Networking::ErrorResponse &error) {
+	_workingRequest = nullptr;
+	if (_ignoreCallback)
+		return;
+	if (error.request)
+		_date = error.request->date();
+	finishError(error);
+}
+
+void GoogleDriveListDirectoryByIdRequest::handle() {}
+
+void GoogleDriveListDirectoryByIdRequest::restart() { start(); }
+
+Common::String GoogleDriveListDirectoryByIdRequest::date() const { return _date; }
+
+void GoogleDriveListDirectoryByIdRequest::finishListing(Common::Array<StorageFile> &files) {
+	Request::finishSuccess();
+	if (_listDirectoryCallback)
+		(*_listDirectoryCallback)(Storage::ListDirectoryResponse(this, files));
+}
+
+} // End of namespace GoogleDrive
+} // End of namespace Cloud

backends/cloud/googledrive/googledrivelistdirectorybyidrequest.h

@@ -0,0 +1,62 @@
+/* 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/>.
+ *
+ */
+
+#ifndef BACKENDS_CLOUD_GOOGLEDRIVE_GOOGLEDRIVELISTDIRECTORYBYIDREQUEST_H
+#define BACKENDS_CLOUD_GOOGLEDRIVE_GOOGLEDRIVELISTDIRECTORYBYIDREQUEST_H
+
+#include "backends/cloud/storage.h"
+#include "backends/networking/http/request.h"
+#include "common/callback.h"
+#include "backends/networking/http/httpjsonrequest.h"
+
+namespace Cloud {
+namespace GoogleDrive {
+
+class GoogleDriveStorage;
+
+class GoogleDriveListDirectoryByIdRequest: public Networking::Request {
+	Common::String _requestedId;
+	GoogleDriveStorage *_storage;
+
+	Storage::ListDirectoryCallback _listDirectoryCallback;
+	Common::Array<StorageFile> _files;
+	Request *_workingRequest;
+	bool _ignoreCallback;
+	Common::String _date;
+
+	void start();
+	void makeRequest(const Common::String &pageToken);
+	void responseCallback(const Networking::JsonResponse &response);
+	void errorCallback(const Networking::ErrorResponse &error);
+	void finishListing(Common::Array<StorageFile> &files);
+public:
+	GoogleDriveListDirectoryByIdRequest(GoogleDriveStorage *storage, const Common::String &id, Storage::ListDirectoryCallback cb, Networking::ErrorCallback ecb);
+	~GoogleDriveListDirectoryByIdRequest() override;
+
+	void handle() override;
+	void restart() override;
+	Common::String date() const override;
+};
+
+} // End of namespace GoogleDrive
+} // End of namespace Cloud
+
+#endif

backends/cloud/googledrive/googledrivestorage.cpp

@@ -0,0 +1,249 @@
+/* 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/googledrive/googledrivestorage.h"
+#include "backends/cloud/cloudmanager.h"
+#include "backends/cloud/googledrive/googledrivetokenrefresher.h"
+#include "backends/cloud/googledrive/googledrivelistdirectorybyidrequest.h"
+#include "backends/cloud/googledrive/googledriveuploadrequest.h"
+#include "backends/networking/http/connectionmanager.h"
+#include "backends/networking/http/httpjsonrequest.h"
+#include "backends/networking/http/networkreadstream.h"
+#include "common/config-manager.h"
+#include "common/debug.h"
+#include "common/formats/json.h"
+#include "common/debug.h"
+
+namespace Cloud {
+namespace GoogleDrive {
+
+#define GOOGLEDRIVE_API_FILES_ALT_MEDIA "https://www.googleapis.com/drive/v3/files/%s?alt=media"
+#define GOOGLEDRIVE_API_FILES "https://www.googleapis.com/drive/v3/files"
+#define GOOGLEDRIVE_API_ABOUT "https://www.googleapis.com/drive/v3/about?fields=storageQuota,user"
+
+GoogleDriveStorage::GoogleDriveStorage(const Common::String &token, const Common::String &refreshToken, bool enabled):
+	IdStorage(token, refreshToken, enabled) {}
+
+GoogleDriveStorage::GoogleDriveStorage(const Common::String &code, Networking::ErrorCallback cb) {
+	getAccessToken(code, cb);
+}
+
+GoogleDriveStorage::GoogleDriveStorage(const Networking::JsonResponse &codeFlowJson, Networking::ErrorCallback cb) {
+	codeFlowComplete(cb, codeFlowJson);
+}
+
+GoogleDriveStorage::~GoogleDriveStorage() {}
+
+Common::String GoogleDriveStorage::cloudProvider() { return "gdrive"; }
+
+uint32 GoogleDriveStorage::storageIndex() { return kStorageGoogleDriveId; }
+
+bool GoogleDriveStorage::needsRefreshToken() { return true; }
+
+bool GoogleDriveStorage::canReuseRefreshToken() { return true; }
+
+void GoogleDriveStorage::saveConfig(const Common::String &keyPrefix) {
+	ConfMan.set(keyPrefix + "access_token", _token, ConfMan.kCloudDomain);
+	ConfMan.set(keyPrefix + "refresh_token", _refreshToken, ConfMan.kCloudDomain);
+	saveIsEnabledFlag(keyPrefix);
+}
+
+Common::String GoogleDriveStorage::name() const {
+	return "Google Drive";
+}
+
+void GoogleDriveStorage::infoInnerCallback(StorageInfoCallback outerCallback, const Networking::JsonResponse &response) {
+	const Common::JSONValue *json = response.value;
+	if (!json) {
+		warning("GoogleDriveStorage::infoInnerCallback: NULL passed instead of JSON");
+		delete outerCallback;
+		return;
+	}
+
+	if (!Networking::HttpJsonRequest::jsonIsObject(json, "GoogleDriveStorage::infoInnerCallback")) {
+		delete json;
+		delete outerCallback;
+		return;
+	}
+
+	Common::JSONObject jsonInfo = json->asObject();
+
+	Common::String uid, displayName, email;
+	uint64 quotaUsed = 0, quotaAllocated = 0;
+
+	if (Networking::HttpJsonRequest::jsonContainsAttribute(jsonInfo, "user", "GoogleDriveStorage::infoInnerCallback") &&
+		Networking::HttpJsonRequest::jsonIsObject(jsonInfo.getVal("user"), "GoogleDriveStorage::infoInnerCallback")) {
+		//"me":true, "kind":"drive#user","photoLink": "",
+		//"displayName":"Alexander Tkachev","emailAddress":"alexander@tkachov.ru","permissionId":""
+		Common::JSONObject user = jsonInfo.getVal("user")->asObject();
+		if (Networking::HttpJsonRequest::jsonContainsString(user, "permissionId", "GoogleDriveStorage::infoInnerCallback"))
+			uid = user.getVal("permissionId")->asString(); //not sure it's user's id, but who cares anyway?
+		if (Networking::HttpJsonRequest::jsonContainsString(user, "displayName", "GoogleDriveStorage::infoInnerCallback"))
+			displayName = user.getVal("displayName")->asString();
+		if (Networking::HttpJsonRequest::jsonContainsString(user, "emailAddress", "GoogleDriveStorage::infoInnerCallback"))
+			email = user.getVal("emailAddress")->asString();
+	}
+
+	if (Networking::HttpJsonRequest::jsonContainsAttribute(jsonInfo, "storageQuota", "GoogleDriveStorage::infoInnerCallback") &&
+		Networking::HttpJsonRequest::jsonIsObject(jsonInfo.getVal("storageQuota"), "GoogleDriveStorage::infoInnerCallback")) {
+		//"usageInDrive":"6332462","limit":"18253611008","usage":"6332462","usageInDriveTrash":"0"
+		Common::JSONObject storageQuota = jsonInfo.getVal("storageQuota")->asObject();
+
+		if (Networking::HttpJsonRequest::jsonContainsString(storageQuota, "usage", "GoogleDriveStorage::infoInnerCallback")) {
+			Common::String usage = storageQuota.getVal("usage")->asString();
+			quotaUsed = usage.asUint64();
+		}
+
+		if (Networking::HttpJsonRequest::jsonContainsString(storageQuota, "limit", "GoogleDriveStorage::infoInnerCallback")) {
+			Common::String limit = storageQuota.getVal("limit")->asString();
+			quotaAllocated = limit.asUint64();
+		}
+	}
+
+	CloudMan.setStorageUsername(kStorageGoogleDriveId, email);
+
+	if (outerCallback) {
+		(*outerCallback)(StorageInfoResponse(nullptr, StorageInfo(uid, displayName, email, quotaUsed, quotaAllocated)));
+		delete outerCallback;
+	}
+
+	delete json;
+}
+
+void GoogleDriveStorage::createDirectoryInnerCallback(BoolCallback outerCallback, const Networking::JsonResponse &response) {
+	const Common::JSONValue *json = response.value;
+	if (!json) {
+		warning("GoogleDriveStorage::createDirectoryInnerCallback: NULL passed instead of JSON");
+		delete outerCallback;
+		return;
+	}
+
+	if (outerCallback) {
+		if (Networking::HttpJsonRequest::jsonIsObject(json, "GoogleDriveStorage::createDirectoryInnerCallback")) {
+			Common::JSONObject jsonInfo = json->asObject();
+			(*outerCallback)(BoolResponse(nullptr, jsonInfo.contains("id")));
+		} else {
+			(*outerCallback)(BoolResponse(nullptr, false));
+		}
+		delete outerCallback;
+	}
+
+	delete json;
+}
+
+Networking::Request *GoogleDriveStorage::listDirectoryById(const Common::String &id, ListDirectoryCallback callback, Networking::ErrorCallback errorCallback) {
+	if (!errorCallback)
+		errorCallback = getErrorPrintingCallback();
+	if (!callback)
+		callback = new Common::Callback<GoogleDriveStorage, const FileArrayResponse &>(this, &GoogleDriveStorage::printFiles);
+	return addRequest(new GoogleDriveListDirectoryByIdRequest(this, id, callback, errorCallback));
+}
+
+Networking::Request *GoogleDriveStorage::upload(const Common::String &path, Common::SeekableReadStream *contents, UploadCallback callback, Networking::ErrorCallback errorCallback) {
+	return addRequest(new GoogleDriveUploadRequest(this, path, contents, callback, errorCallback));
+}
+
+Networking::Request *GoogleDriveStorage::streamFileById(const Common::String &id, Networking::NetworkReadStreamCallback callback, Networking::ErrorCallback errorCallback) {
+	if (callback) {
+		Common::String url = Common::String::format(GOOGLEDRIVE_API_FILES_ALT_MEDIA, Common::percentEncodeString(id).c_str());
+		Common::String header = "Authorization: Bearer " + _token;
+		Networking::RequestHeaders *headersList = new Networking::RequestHeaders();
+		headersList->push_back(header);
+		Networking::NetworkReadStream *stream = Networking::NetworkReadStream::make(url.c_str(), headersList, "");
+		(*callback)(Networking::NetworkReadStreamResponse(nullptr, stream));
+	}
+	delete callback;
+	delete errorCallback;
+	return nullptr;
+}
+
+void GoogleDriveStorage::printInfo(const StorageInfoResponse &response) {
+	debug(9, "\nGoogleDriveStorage: user info:");
+	debug(9, "\tname: %s", response.value.name().c_str());
+	debug(9, "\temail: %s", response.value.email().c_str());
+	debug(9, "\tdisk usage: %llu/%llu",
+		  (unsigned long long)response.value.used(),
+		  (unsigned long long)response.value.available());
+}
+
+Networking::Request *GoogleDriveStorage::createDirectoryWithParentId(const Common::String &parentId, const Common::String &directoryName, BoolCallback callback, Networking::ErrorCallback errorCallback) {
+	if (!errorCallback)
+		errorCallback = getErrorPrintingCallback();
+
+	Common::String url = GOOGLEDRIVE_API_FILES;
+	Networking::JsonCallback innerCallback = new Common::CallbackBridge<GoogleDriveStorage, const BoolResponse &, const Networking::JsonResponse &>(this, &GoogleDriveStorage::createDirectoryInnerCallback, callback);
+	Networking::HttpJsonRequest *request = new GoogleDriveTokenRefresher(this, innerCallback, errorCallback, url.c_str());
+	request->addHeader("Authorization: Bearer " + accessToken());
+	request->addHeader("Content-Type: application/json");
+
+	Common::JSONArray parentsArray;
+	parentsArray.push_back(new Common::JSONValue(parentId));
+
+	Common::JSONObject jsonRequestParameters;
+	jsonRequestParameters.setVal("mimeType", new Common::JSONValue("application/vnd.google-apps.folder"));
+	jsonRequestParameters.setVal("name", new Common::JSONValue(directoryName));
+	jsonRequestParameters.setVal("parents", new Common::JSONValue(parentsArray));
+
+	Common::JSONValue value(jsonRequestParameters);
+	request->addPostField(Common::JSON::stringify(&value));
+
+	return addRequest(request);
+}
+
+Networking::Request *GoogleDriveStorage::info(StorageInfoCallback callback, Networking::ErrorCallback errorCallback) {
+	if (!callback)
+		callback = new Common::Callback<GoogleDriveStorage, const StorageInfoResponse &>(this, &GoogleDriveStorage::printInfo);
+	Networking::JsonCallback innerCallback = new Common::CallbackBridge<GoogleDriveStorage, const StorageInfoResponse &, const Networking::JsonResponse &>(this, &GoogleDriveStorage::infoInnerCallback, callback);
+	Networking::HttpJsonRequest *request = new GoogleDriveTokenRefresher(this, innerCallback, errorCallback, GOOGLEDRIVE_API_ABOUT);
+	request->addHeader("Authorization: Bearer " + _token);
+	return addRequest(request);
+}
+
+Common::String GoogleDriveStorage::savesDirectoryPath() { return "scummvm/saves/"; }
+
+GoogleDriveStorage *GoogleDriveStorage::loadFromConfig(const Common::String &keyPrefix) {
+	if (!ConfMan.hasKey(keyPrefix + "access_token", ConfMan.kCloudDomain)) {
+		warning("GoogleDriveStorage: no access_token found");
+		return nullptr;
+	}
+
+	if (!ConfMan.hasKey(keyPrefix + "refresh_token", ConfMan.kCloudDomain)) {
+		warning("GoogleDriveStorage: no refresh_token found");
+		return nullptr;
+	}
+
+	Common::String accessToken = ConfMan.get(keyPrefix + "access_token", ConfMan.kCloudDomain);
+	Common::String refreshToken = ConfMan.get(keyPrefix + "refresh_token", ConfMan.kCloudDomain);
+	return new GoogleDriveStorage(accessToken, refreshToken, loadIsEnabledFlag(keyPrefix));
+}
+
+void GoogleDriveStorage::removeFromConfig(const Common::String &keyPrefix) {
+	ConfMan.removeKey(keyPrefix + "access_token", ConfMan.kCloudDomain);
+	ConfMan.removeKey(keyPrefix + "refresh_token", ConfMan.kCloudDomain);
+	removeIsEnabledFlag(keyPrefix);
+}
+
+Common::String GoogleDriveStorage::getRootDirectoryId() {
+	return "root";
+}
+
+} // End of namespace GoogleDrive
+} // End of namespace Cloud

backends/cloud/googledrive/googledrivestorage.h

@@ -0,0 +1,125 @@
+/* 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/>.
+ *
+ */
+
+#ifndef BACKENDS_CLOUD_GOOGLEDRIVE_GOOGLEDRIVESTORAGE_H
+#define BACKENDS_CLOUD_GOOGLEDRIVE_GOOGLEDRIVESTORAGE_H
+
+#include "backends/cloud/id/idstorage.h"
+#include "backends/networking/http/httpjsonrequest.h"
+
+namespace Cloud {
+namespace GoogleDrive {
+
+class GoogleDriveStorage: public Id::IdStorage {
+	/** This private constructor is called from loadFromConfig(). */
+	GoogleDriveStorage(const Common::String &token, const Common::String &refreshToken, bool enabled);
+
+	/** Constructs StorageInfo based on JSON response from cloud. */
+	void infoInnerCallback(StorageInfoCallback outerCallback, const Networking::JsonResponse &json);
+
+	/** Returns bool based on JSON response from cloud. */
+	void createDirectoryInnerCallback(BoolCallback outerCallback, const Networking::JsonResponse &json);
+
+	void printInfo(const StorageInfoResponse &response);
+
+protected:
+	/**
+	 * @return "gdrive"
+	 */
+	Common::String cloudProvider() override;
+
+	/**
+	 * @return kStorageGoogleDriveId
+	 */
+	uint32 storageIndex() override;
+
+	bool needsRefreshToken() override;
+
+	bool canReuseRefreshToken() override;
+
+public:
+	/** This constructor uses OAuth code flow to get tokens. */
+	GoogleDriveStorage(const Common::String &code, Networking::ErrorCallback cb);
+
+	/** This constructor extracts tokens from JSON acquired via OAuth code flow. */
+	GoogleDriveStorage(const Networking::JsonResponse &codeFlowJson, Networking::ErrorCallback cb);
+
+	~GoogleDriveStorage() override;
+
+	/**
+	 * Storage methods, which are used by CloudManager to save
+	 * storage in configuration file.
+	 */
+
+	/**
+	 * Save storage data using ConfMan.
+	 * @param keyPrefix all saved keys must start with this prefix.
+	 * @note every Storage must write keyPrefix + "type" key
+	 *       with common value (e.g. "Dropbox").
+	 */
+	void saveConfig(const Common::String &keyPrefix) override;
+
+	/**
+	* Return unique storage name.
+	* @returns  some unique storage name (for example, "Dropbox (user@example.com)")
+	*/
+	Common::String name() const override;
+
+	/** Public Cloud API comes down there. */
+
+	/** Returns Array<StorageFile> - the list of files. */
+	Networking::Request *listDirectoryById(const Common::String &id, ListDirectoryCallback callback, Networking::ErrorCallback errorCallback) override;
+
+	/** Returns UploadStatus struct with info about uploaded file. */
+	Networking::Request *upload(const Common::String &path, Common::SeekableReadStream *contents, UploadCallback callback, Networking::ErrorCallback errorCallback) override;
+
+	/** Returns pointer to Networking::NetworkReadStream. */
+	Networking::Request *streamFileById(const Common::String &id, Networking::NetworkReadStreamCallback callback, Networking::ErrorCallback errorCallback) override;
+
+	/** Calls the callback when finished. */
+	Networking::Request *createDirectoryWithParentId(const Common::String &parentId, const Common::String &directoryName, BoolCallback callback, Networking::ErrorCallback errorCallback) override;
+
+	/** Returns the StorageInfo struct. */
+	Networking::Request *info(StorageInfoCallback callback, Networking::ErrorCallback errorCallback) override;
+
+	/** Returns storage's saves directory path with the trailing slash. */
+	Common::String savesDirectoryPath() override;
+
+	/**
+	 * Load token and user id from configs and return GoogleDriveStorage for those.
+	 * @return pointer to the newly created GoogleDriveStorage or 0 if some problem occurred.
+	 */
+	static GoogleDriveStorage *loadFromConfig(const Common::String &keyPrefix);
+
+	/**
+	 * Remove all GoogleDriveStorage-related data from config.
+	 */
+	static void removeFromConfig(const Common::String &keyPrefix);
+
+	Common::String getRootDirectoryId() override;
+
+	Common::String accessToken() const { return _token; }
+};
+
+} // End of namespace GoogleDrive
+} // End of namespace Cloud
+
+#endif

backends/cloud/googledrive/googledrivetokenrefresher.cpp

@@ -0,0 +1,108 @@
+/* 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/googledrive/googledrivetokenrefresher.h"
+#include "backends/cloud/googledrive/googledrivestorage.h"
+#include "backends/networking/http/networkreadstream.h"
+#include "common/debug.h"
+#include "common/formats/json.h"
+
+namespace Cloud {
+namespace GoogleDrive {
+
+GoogleDriveTokenRefresher::GoogleDriveTokenRefresher(GoogleDriveStorage *parent, Networking::JsonCallback callback, Networking::ErrorCallback ecb, const char *url):
+	HttpJsonRequest(callback, ecb, url), _parentStorage(parent) {}
+
+GoogleDriveTokenRefresher::~GoogleDriveTokenRefresher() {}
+
+void GoogleDriveTokenRefresher::tokenRefreshed(const 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, "GoogleDriveTokenRefresher::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 GoogleDriveTokenRefresher::finishJson(const Common::JSONValue *json) {
+	if (!json) {
+		//that's probably not an error (200 OK)
+		HttpJsonRequest::finishJson(nullptr);
+		return;
+	}
+
+	if (jsonIsObject(json, "GoogleDriveTokenRefresher")) {
+		Common::JSONObject result = json->asObject();
+		long httpResponseCode = -1;
+		if (result.contains("error") && jsonIsObject(result.getVal("error"), "GoogleDriveTokenRefresher")) {
+			//new token needed => request token & then retry original request
+			if (_stream) {
+				httpResponseCode = _stream->httpResponseCode();
+				debug(9, "GoogleDriveTokenRefresher: code = %ld", httpResponseCode);
+			}
+
+			Common::JSONObject error = result.getVal("error")->asObject();
+			bool irrecoverable = true;
+
+			uint32 code = 0xFFFFFFFF; // Invalid
+			Common::String message;
+			if (jsonContainsIntegerNumber(error, "code", "GoogleDriveTokenRefresher")) {
+				code = error.getVal("code")->asIntegerNumber();
+				debug(9, "GoogleDriveTokenRefresher: code = %u", code);
+			}
+
+			if (jsonContainsString(error, "message", "GoogleDriveTokenRefresher")) {
+				message = error.getVal("message")->asString();
+				debug(9, "GoogleDriveTokenRefresher: message = %s", message.c_str());
+			}
+
+			if (code == 401 || message == "Invalid Credentials")
+				irrecoverable = false;
+
+			if (irrecoverable) {
+				finishError(Networking::ErrorResponse(this, false, true, json->stringify(true), httpResponseCode));
+				delete json;
+				return;
+			}
+
+			pause();
+			delete json;
+			_parentStorage->refreshAccessToken(new Common::Callback<GoogleDriveTokenRefresher, const Storage::BoolResponse &>(this, &GoogleDriveTokenRefresher::tokenRefreshed));
+			return;
+		}
+	}
+
+	//notify user of success
+	HttpJsonRequest::finishJson(json);
+}
+
+} // End of namespace GoogleDrive
+} // End of namespace Cloud

backends/cloud/googledrive/googledrivetokenrefresher.h

@@ -0,0 +1,47 @@
+/* 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/>.
+ *
+ */
+
+#ifndef BACKENDS_CLOUD_GOOGLEDRIVE_GOOGLEDRIVETOKENREFRESHER_H
+#define BACKENDS_CLOUD_GOOGLEDRIVE_GOOGLEDRIVETOKENREFRESHER_H
+
+#include "backends/cloud/storage.h"
+#include "backends/networking/http/httpjsonrequest.h"
+
+namespace Cloud {
+namespace GoogleDrive {
+
+class GoogleDriveStorage;
+
+class GoogleDriveTokenRefresher: public Networking::HttpJsonRequest {
+	GoogleDriveStorage *_parentStorage;
+
+	void tokenRefreshed(const Storage::BoolResponse &response);
+
+	void finishJson(const Common::JSONValue *json) override;
+public:
+	GoogleDriveTokenRefresher(GoogleDriveStorage *parent, Networking::JsonCallback callback, Networking::ErrorCallback ecb, const char *url);
+	~GoogleDriveTokenRefresher() override;
+};
+
+} // End of namespace GoogleDrive
+} // End of namespace Cloud
+
+#endif

backends/cloud/googledrive/googledriveuploadrequest.cpp

@@ -0,0 +1,344 @@
+/* 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/googledrive/googledriveuploadrequest.h"
+#include "backends/cloud/googledrive/googledrivestorage.h"
+#include "backends/cloud/iso8601.h"
+#include "backends/cloud/storage.h"
+#include "backends/networking/http/connectionmanager.h"
+#include "backends/networking/http/httpjsonrequest.h"
+#include "backends/networking/http/networkreadstream.h"
+#include "common/formats/json.h"
+#include "googledrivetokenrefresher.h"
+
+namespace Cloud {
+namespace GoogleDrive {
+
+#define GOOGLEDRIVE_API_FILES "https://www.googleapis.com/upload/drive/v3/files"
+
+GoogleDriveUploadRequest::GoogleDriveUploadRequest(GoogleDriveStorage *storage, const Common::String &path, Common::SeekableReadStream *contents, Storage::UploadCallback callback, Networking::ErrorCallback ecb):
+	Networking::Request(nullptr, ecb), _storage(storage), _savePath(path), _contentsStream(contents), _uploadCallback(callback),
+	_workingRequest(nullptr), _ignoreCallback(false) {
+	start();
+}
+
+GoogleDriveUploadRequest::~GoogleDriveUploadRequest() {
+	_ignoreCallback = true;
+	if (_workingRequest)
+		_workingRequest->finish();
+	delete _contentsStream;
+	delete _uploadCallback;
+}
+
+void GoogleDriveUploadRequest::start() {
+	_ignoreCallback = true;
+	if (_workingRequest)
+		_workingRequest->finish();
+	if (_contentsStream == nullptr || !_contentsStream->seek(0)) {
+		warning("GoogleDriveUploadRequest: cannot restart because stream couldn't seek(0)");
+		finishError(Networking::ErrorResponse(this, false, true, "GoogleDriveUploadRequest::start: couldn't restart because failed to seek(0)", -1));
+		return;
+	}
+	_resolvedId = ""; //used to update file contents
+	_parentId = ""; //used to create file within parent directory
+	_serverReceivedBytes = 0;
+	_ignoreCallback = false;
+
+	resolveId();
+}
+
+void GoogleDriveUploadRequest::resolveId() {
+	//check whether such file already exists
+	Storage::UploadCallback innerCallback = new Common::Callback<GoogleDriveUploadRequest, const Storage::UploadResponse &>(this, &GoogleDriveUploadRequest::idResolvedCallback);
+	Networking::ErrorCallback innerErrorCallback = new Common::Callback<GoogleDriveUploadRequest, const Networking::ErrorResponse &>(this, &GoogleDriveUploadRequest::idResolveFailedCallback);
+	_workingRequest = _storage->resolveFileId(_savePath, innerCallback, innerErrorCallback);
+}
+
+void GoogleDriveUploadRequest::idResolvedCallback(const Storage::UploadResponse &response) {
+	_workingRequest = nullptr;
+	if (_ignoreCallback)
+		return;
+	_resolvedId = response.value.id();
+	startUpload();
+}
+
+void GoogleDriveUploadRequest::idResolveFailedCallback(const Networking::ErrorResponse &error) {
+	_workingRequest = nullptr;
+	if (_ignoreCallback)
+		return;
+
+	//not resolved => error or no such file
+	if (error.response.contains("no such file found in its parent directory")) {
+		//parent's id after the '\n'
+		Common::String parentId = error.response;
+		for (uint32 i = 0; i < parentId.size(); ++i)
+			if (parentId[i] == '\n') {
+				parentId.erase(0, i + 1);
+				break;
+			}
+
+		_parentId = parentId;
+		startUpload();
+		return;
+	}
+
+	finishError(error);
+}
+
+void GoogleDriveUploadRequest::startUpload() {
+	Common::String name = _savePath;
+	for (uint32 i = name.size(); i > 0; --i) {
+		if (name[i - 1] == '/' || name[i - 1] == '\\') {
+			name.erase(0, i);
+			break;
+		}
+	}
+
+	Common::String url = GOOGLEDRIVE_API_FILES;
+	if (_resolvedId != "")
+		url += "/" + Common::percentEncodeString(_resolvedId);
+	url += "?uploadType=resumable&fields=id,mimeType,modifiedTime,name,size";
+	Networking::JsonCallback callback = new Common::Callback<GoogleDriveUploadRequest, const Networking::JsonResponse &>(this, &GoogleDriveUploadRequest::startUploadCallback);
+	Networking::ErrorCallback failureCallback = new Common::Callback<GoogleDriveUploadRequest, const Networking::ErrorResponse &>(this, &GoogleDriveUploadRequest::startUploadErrorCallback);
+	Networking::HttpJsonRequest *request = new GoogleDriveTokenRefresher(_storage, callback, failureCallback, url.c_str());
+	request->addHeader("Authorization: Bearer " + _storage->accessToken());
+	request->addHeader("Content-Type: application/json");
+	if (_resolvedId != "")
+		request->usePatch();
+
+	Common::JSONObject jsonRequestParameters;
+	if (_resolvedId != "") {
+		jsonRequestParameters.setVal("id", new Common::JSONValue(_resolvedId));
+	} else {
+		Common::JSONArray parentsArray;
+		parentsArray.push_back(new Common::JSONValue(_parentId));
+		jsonRequestParameters.setVal("parents", new Common::JSONValue(parentsArray));
+	}
+	jsonRequestParameters.setVal("name", new Common::JSONValue(name));
+
+	Common::JSONValue value(jsonRequestParameters);
+	request->addPostField(Common::JSON::stringify(&value));
+
+	_workingRequest = ConnMan.addRequest(request);
+}
+
+void GoogleDriveUploadRequest::startUploadCallback(const Networking::JsonResponse &response) {
+	_workingRequest = nullptr;
+	if (_ignoreCallback)
+		return;
+
+	Networking::ErrorResponse error(this, false, true, "GoogleDriveUploadRequest::startUploadCallback", -1);
+	const Networking::HttpJsonRequest *rq = (const Networking::HttpJsonRequest *)response.request;
+	if (rq) {
+		const Networking::NetworkReadStream *stream = rq->getNetworkReadStream();
+		if (stream) {
+			long code = stream->httpResponseCode();
+			if (code == 200) {
+				Common::HashMap<Common::String, Common::String> headers = stream->responseHeadersMap();
+				if (headers.contains("location")) {
+					_uploadUrl = headers["location"];
+					uploadNextPart();
+					return;
+				} else {
+					error.response += ": response must provide Location header, but it's not there";
+				}
+			} else {
+				error.response += ": response is not 200 OK";
+			}
+
+			error.httpResponseCode = code;
+		} else {
+			error.response += ": missing response stream [improbable]";
+		}
+	} else {
+		error.response += ": missing request object [improbable]";
+	}
+
+	const Common::JSONValue *json = response.value;
+	delete json;
+
+	finishError(error);
+}
+
+void GoogleDriveUploadRequest::startUploadErrorCallback(const Networking::ErrorResponse &error) {
+	_workingRequest = nullptr;
+	if (_ignoreCallback)
+		return;
+	finishError(error);
+}
+
+void GoogleDriveUploadRequest::uploadNextPart() {
+	const uint32 UPLOAD_PER_ONE_REQUEST = 10 * 1024 * 1024;
+	Common::String url = _uploadUrl;
+
+	Networking::JsonCallback callback = new Common::Callback<GoogleDriveUploadRequest, const Networking::JsonResponse &>(this, &GoogleDriveUploadRequest::partUploadedCallback);
+	Networking::ErrorCallback failureCallback = new Common::Callback<GoogleDriveUploadRequest, const Networking::ErrorResponse &>(this, &GoogleDriveUploadRequest::partUploadedErrorCallback);
+	Networking::HttpJsonRequest *request = new GoogleDriveTokenRefresher(_storage, callback, failureCallback, url.c_str());
+	request->addHeader("Authorization: Bearer " + _storage->accessToken());
+	request->usePut();
+
+	uint32 oldPos = _contentsStream->pos();
+	if (oldPos != _serverReceivedBytes) {
+		if (!_contentsStream->seek(_serverReceivedBytes)) {
+			warning("GoogleDriveUploadRequest: cannot upload because stream couldn't seek(%llu)", (unsigned long long)_serverReceivedBytes);
+			finishError(Networking::ErrorResponse(this, false, true, "GoogleDriveUploadRequest::uploadNextPart: seek() didn't work", -1));
+			return;
+		}
+		oldPos = _serverReceivedBytes;
+	}
+
+	byte *buffer = new byte[UPLOAD_PER_ONE_REQUEST];
+	uint32 size = _contentsStream->read(buffer, UPLOAD_PER_ONE_REQUEST);
+	if (size != 0)
+		request->setBuffer(buffer, size);
+
+	if (_uploadUrl != "") {
+		if (_contentsStream->pos() == 0)
+			request->addHeader(Common::String::format("Content-Length: 0"));
+		else
+			request->addHeader(Common::String::format("Content-Range: bytes %u-%lu/%lu", oldPos, long(_contentsStream->pos() - 1), long(_contentsStream->size())));
+	}
+
+	_workingRequest = ConnMan.addRequest(request);
+}
+
+bool GoogleDriveUploadRequest::handleHttp308(const Networking::NetworkReadStream *stream) {
+	//308 Resume Incomplete, with Range: X-Y header
+	if (!stream)
+		return false;
+	if (stream->httpResponseCode() != 308)
+		return false; //seriously
+
+	Common::HashMap<Common::String, Common::String> headers = stream->responseHeadersMap();
+	if (headers.contains("range")) {
+		Common::String range = headers["range"];
+		for (int rangeTry = 0; rangeTry < 2; ++rangeTry) {
+			const char *needle = (rangeTry == 0 ? "0-" : "bytes=0-"); //if it lost the first part, I refuse to talk with it
+			uint32 needleLength = (rangeTry == 0 ? 2 : 8);
+
+			if (range.hasPrefix(needle)) {
+				range.erase(0, needleLength);
+				_serverReceivedBytes = range.asUint64() + 1;
+				uploadNextPart();
+				return true;
+			}
+		}
+	}
+
+	return false;
+}
+
+void GoogleDriveUploadRequest::partUploadedCallback(const Networking::JsonResponse &response) {
+	_workingRequest = nullptr;
+	if (_ignoreCallback)
+		return;
+
+	Networking::ErrorResponse error(this, false, true, "", -1);
+	const Networking::HttpJsonRequest *rq = (const Networking::HttpJsonRequest *)response.request;
+	if (rq) {
+		const Networking::NetworkReadStream *stream = rq->getNetworkReadStream();
+		if (stream) {
+			long code = stream->httpResponseCode();
+			error.httpResponseCode = code;
+			if (code == 308 && handleHttp308(stream)) {
+				delete response.value;
+				return;
+			}
+		}
+	}
+
+	const Common::JSONValue *json = response.value;
+	if (json == nullptr) {
+		error.response = "Failed to parse JSON, null passed!";
+		finishError(error);
+		return;
+	}
+
+	if (json->isObject()) {
+		Common::JSONObject object = json->asObject();
+
+		if (object.contains("error")) {
+			warning("GoogleDrive returned error: %s", json->stringify(true).c_str());
+			error.response = json->stringify(true);
+			finishError(error);
+			delete json;
+			return;
+		}
+
+		if (Networking::HttpJsonRequest::jsonContainsString(object, "id", "GoogleDriveUploadRequest") &&
+			Networking::HttpJsonRequest::jsonContainsString(object, "name", "GoogleDriveUploadRequest") &&
+			Networking::HttpJsonRequest::jsonContainsString(object, "mimeType", "GoogleDriveUploadRequest")) {
+			//finished
+			Common::String id = object.getVal("id")->asString();
+			Common::String name = object.getVal("name")->asString();
+			bool isDirectory = (object.getVal("mimeType")->asString() == "application/vnd.google-apps.folder");
+			uint32 size = 0, timestamp = 0;
+			if (Networking::HttpJsonRequest::jsonContainsString(object, "size", "GoogleDriveUploadRequest", true))
+				size = object.getVal("size")->asString().asUint64();
+			if (Networking::HttpJsonRequest::jsonContainsString(object, "modifiedTime", "GoogleDriveUploadRequest", true))
+				timestamp = ISO8601::convertToTimestamp(object.getVal("modifiedTime")->asString());
+
+			finishUpload(StorageFile(id, _savePath, name, size, timestamp, isDirectory));
+			return;
+		}
+	}
+
+	if (_contentsStream->eos() || _contentsStream->pos() >= _contentsStream->size() - 1) {
+		warning("GoogleDriveUploadRequest: no file info to return");
+		finishUpload(StorageFile(_savePath, 0, 0, false));
+	} else {
+		uploadNextPart();
+	}
+
+	delete json;
+}
+
+void GoogleDriveUploadRequest::partUploadedErrorCallback(const Networking::ErrorResponse &error) {
+	_workingRequest = nullptr;
+	if (_ignoreCallback)
+		return;
+
+	Networking::HttpJsonRequest *rq = (Networking::HttpJsonRequest *)error.request;
+	if (rq) {
+		const Networking::NetworkReadStream *stream = rq->getNetworkReadStream();
+		if (stream) {
+			long code = stream->httpResponseCode();
+			if (code == 308 && handleHttp308(stream)) {
+				return;
+			}
+		}
+	}
+
+	finishError(error);
+}
+
+void GoogleDriveUploadRequest::handle() {}
+
+void GoogleDriveUploadRequest::restart() { start(); }
+
+void GoogleDriveUploadRequest::finishUpload(const StorageFile &file) {
+	Request::finishSuccess();
+	if (_uploadCallback)
+		(*_uploadCallback)(Storage::UploadResponse(this, file));
+}
+
+} // End of namespace GoogleDrive
+} // End of namespace Cloud

backends/cloud/googledrive/googledriveuploadrequest.h

@@ -0,0 +1,69 @@
+/* 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/>.
+ *
+ */
+
+#ifndef BACKENDS_CLOUD_GOOGLEDRIVE_GOOGLEDRIVEUPLOADREQUEST_H
+#define BACKENDS_CLOUD_GOOGLEDRIVE_GOOGLEDRIVEUPLOADREQUEST_H
+
+#include "backends/cloud/storage.h"
+#include "backends/networking/http/httpjsonrequest.h"
+#include "backends/networking/http/request.h"
+#include "common/callback.h"
+
+namespace Cloud {
+namespace GoogleDrive {
+class GoogleDriveStorage;
+
+class GoogleDriveUploadRequest: public Networking::Request {
+	GoogleDriveStorage *_storage;
+	Common::String _savePath;
+	Common::SeekableReadStream *_contentsStream;
+	Storage::UploadCallback _uploadCallback;
+	Request *_workingRequest;
+	bool _ignoreCallback;
+	Common::String _resolvedId, _parentId;
+	Common::String _uploadUrl;
+	uint64 _serverReceivedBytes;
+
+	void start();
+	void resolveId();
+	void idResolvedCallback(const Storage::UploadResponse &response);
+	void idResolveFailedCallback(const Networking::ErrorResponse &error);
+	void startUpload();
+	void startUploadCallback(const Networking::JsonResponse &response);
+	void startUploadErrorCallback(const Networking::ErrorResponse &error);
+	void uploadNextPart();
+	void partUploadedCallback(const Networking::JsonResponse &response);
+	void partUploadedErrorCallback(const Networking::ErrorResponse &error);
+	bool handleHttp308(const Networking::NetworkReadStream *stream);
+	void finishUpload(const StorageFile &status);
+
+public:
+	GoogleDriveUploadRequest(GoogleDriveStorage *storage, const Common::String &path, Common::SeekableReadStream *contents, Storage::UploadCallback callback, Networking::ErrorCallback ecb);
+	~GoogleDriveUploadRequest() override;
+
+	void handle() override;
+	void restart() override;
+};
+
+} // End of namespace GoogleDrive
+} // End of namespace Cloud
+
+#endif