Pithos_GSS » GSS

/*

 * Copyright 2009 Electronic Business Systems Ltd.

 *

 * This file is part of GSS.

 *

 * GSS 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.

 *

 * GSS 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 GSS.  If not, see <http://www.gnu.org/licenses/>.

 */

package gr.ebs.gss.client;

import gr.ebs.gss.client.rest.RestCommand;

import com.google.gwt.gears.client.desktop.File;

import com.google.gwt.gears.client.httprequest.HttpRequest;

import com.google.gwt.gears.client.httprequest.ProgressEvent;

import com.google.gwt.gears.client.httprequest.ProgressHandler;

import com.google.gwt.gears.client.httprequest.RequestCallback;

/**

 * The 'File upload' dialog box implementation with Google Gears support

 * for IE.

 */

public class FileUploadGearsIEDialog extends FileUploadGearsDialog implements Updateable {

	/**

	 * Perform the HTTP request to upload the specified file.

	 */

	@Override

	protected void doSend(final File file, final int index) {

		final GSS app = GSS.get();

		HttpRequest request = factory.createHttpRequest();

		requests.add(request);

		String method = "POST";

		String path;

		final String filename = getFilename(file.getName());

		path = folder.getUri();

		if (!path.endsWith("/"))

			path = path + "/";

		path = path + encode(filename);

		String token = app.getToken();

		String resource = path.substring(app.getApiPath().length()-1, path.length());

		String date = RestCommand.getDate();

		String sig = RestCommand.calculateSig(method, date, resource, RestCommand.base64decode(token));

		request.open(method, path);

		request.setRequestHeader("X-GSS-Date", date);

		request.setRequestHeader("Authorization", app.getCurrentUserResource().getUsername() + " " + sig);

		request.setRequestHeader("Accept", "application/json; charset=utf-8");

		request.setCallback(new RequestCallback() {

			@Override

			public void onResponseReceived(HttpRequest req) {

				// XXX: No error checking, since IE throws an Internal Error

				// when accessing req.getStatus().

				selectedFiles.remove(file);

				finish();

			}

		});

		request.getUpload().setProgressHandler(new ProgressHandler() {

			@Override

			public void onProgress(ProgressEvent event) {

				double pcnt = (double) event.getLoaded() / event.getTotal();

				progressBars.get(index).setProgress((int) Math.floor(pcnt * 100));

			}

		});

		request.send(file.getBlob());

	}

}