Synnefo

/*

 * Copyright 2011 GRNET S.A. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or

 * without modification, are permitted provided that the following

 * conditions are met:

 *

 *   1. Redistributions of source code must retain the above

 *      copyright notice, this list of conditions and the following

 *      disclaimer.

 *

 *   2. Redistributions in binary form must reproduce the above

 *      copyright notice, this list of conditions and the following

 *      disclaimer in the documentation and/or other materials

 *      provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE.

 *

 * The views and conclusions contained in the software and

 * documentation are those of the authors and should not be

 * interpreted as representing official policies, either expressed

 * or implied, of GRNET S.A.

 */

package gr.grnet.pithos.web.client;

import java.util.List;

import gr.grnet.pithos.web.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()){                                        

                                        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());

        }

}