Synnefo

/*

 * 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 java.util.List;

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 List<File> filesRemaining) {

                final GSS app = GSS.get();

                HttpRequest request = factory.createHttpRequest();

                requests.add(request);

                String method = "POST";

                String path;

                final String filename = getFilename(filesRemaining.get(0).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().

                                filesRemaining.remove(0);

                                if(filesRemaining.isEmpty()){

                                        selectedFiles = filesRemaining;

                                        finish();                                        

                                }

                                doSend(filesRemaining);        

                        }

                });

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

                        @Override

                        public void onProgress(ProgressEvent event) {

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

                                progressBars.get(0).setProgress((int) Math.floor(pcnt * 100));

                                if(pcnt*100 == 100)

                                        progressBars.remove(0);

                        }

                });

                request.send(filesRemaining.get(0).getBlob());

        }

}