2 * Copyright 2009 Electronic Business Systems Ltd.
4 * This file is part of GSS.
6 * GSS is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * GSS is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with GSS. If not, see <http://www.gnu.org/licenses/>.
19 package gr.ebs.gss.client;
21 import gr.ebs.gss.client.rest.PostCommand;
22 import gr.ebs.gss.client.rest.RestCommand;
23 import gr.ebs.gss.client.rest.RestException;
24 import gr.ebs.gss.client.rest.resource.FileResource;
25 import gr.ebs.gss.client.rest.resource.FolderResource;
27 import java.util.ArrayList;
28 import java.util.Arrays;
29 import java.util.HashMap;
30 import java.util.List;
33 import com.google.gwt.core.client.GWT;
34 import com.google.gwt.event.dom.client.ClickEvent;
35 import com.google.gwt.event.dom.client.ClickHandler;
36 import com.google.gwt.gears.client.Factory;
37 import com.google.gwt.gears.client.desktop.Desktop;
38 import com.google.gwt.gears.client.desktop.File;
39 import com.google.gwt.gears.client.desktop.OpenFilesHandler;
40 import com.google.gwt.gears.client.httprequest.HttpRequest;
41 import com.google.gwt.gears.client.httprequest.ProgressEvent;
42 import com.google.gwt.gears.client.httprequest.ProgressHandler;
43 import com.google.gwt.gears.client.httprequest.RequestCallback;
44 import com.google.gwt.http.client.URL;
45 import com.google.gwt.json.client.JSONObject;
46 import com.google.gwt.json.client.JSONString;
47 import com.google.gwt.user.client.Command;
48 import com.google.gwt.user.client.DeferredCommand;
49 import com.google.gwt.user.client.ui.Button;
50 import com.google.gwt.user.client.ui.FlexTable;
51 import com.google.gwt.user.client.ui.HTML;
52 import com.google.gwt.user.client.ui.HasHorizontalAlignment;
53 import com.google.gwt.user.client.ui.HorizontalPanel;
54 import com.google.gwt.user.client.ui.VerticalPanel;
57 * The 'File upload' dialog box implementation with Google Gears support.
59 public class FileUploadGearsDialog extends FileUploadDialog implements Updateable {
61 protected final Factory factory = Factory.getInstance();
64 * The array of files to upload.
66 private File[] fileObjects;
69 * A list of files to upload, created from files array. Used to signal
70 * finished state when empty.
72 protected List<File> selectedFiles = new ArrayList<File>();
75 * The list of progress bars for individual files.
77 protected List<ProgressBar> progressBars = new ArrayList<ProgressBar>();
79 private Button browse;
81 private Button submit;
83 private FlexTable generalTable;
85 private Map<String, FileResource> toRename;
87 protected List<HttpRequest> requests = new ArrayList<HttpRequest>();
90 * The widget's constructor.
92 public FileUploadGearsDialog() {
93 // Set the dialog's caption.
94 setText("File upload");
95 setAnimationEnabled(true);
96 // Create a panel to hold all of the dialog widgets.
97 VerticalPanel panel = new VerticalPanel();
98 final HTML info = new HTML("You may select one or more files to upload.");
99 info.addStyleName("gss-uploadNote");
101 // Add an informative label with the folder name.
102 Object selection = GSS.get().getFolders().getCurrent().getUserObject();
103 folder = (FolderResource) selection;
105 browse = new Button("Browse...");
107 HorizontalPanel fileUploadPanel = new HorizontalPanel();
108 fileUploadPanel.add(browse);
110 generalTable = new FlexTable();
111 generalTable.setText(0, 0, "Folder");
112 generalTable.setText(1, 0, "File");
113 generalTable.setText(0, 1, folder.getName());
114 generalTable.setWidget(1, 1, fileUploadPanel);
115 generalTable.getCellFormatter().setStyleName(0, 0, "props-labels");
116 generalTable.getCellFormatter().setStyleName(1, 0, "props-labels");
117 generalTable.getCellFormatter().setStyleName(0, 1, "props-values");
118 generalTable.getCellFormatter().setStyleName(1, 1, "props-values");
119 generalTable.setCellSpacing(4);
121 panel.add(generalTable);
123 // Create a panel to hold the buttons.
124 HorizontalPanel buttons = new HorizontalPanel();
126 submit = new Button("Upload");
127 submit.addClickHandler(new ClickHandler() {
129 public void onClick(ClickEvent event) {
133 submit.setEnabled(false);
135 buttons.setCellHorizontalAlignment(submit, HasHorizontalAlignment.ALIGN_CENTER);
136 // Create the 'Cancel' button, along with a listener that hides the
137 // dialog when the button is clicked.
138 Button cancel = new Button("Cancel", new ClickHandler() {
140 public void onClick(ClickEvent event) {
145 buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);
146 buttons.setSpacing(8);
147 buttons.addStyleName("gss-DialogBox");
149 browse.addClickHandler(new ClickHandler() {
151 public void onClick(ClickEvent event) {
152 Desktop desktop = factory.createDesktop();
153 desktop.openFiles(new OpenFilesHandler() {
156 public void onOpenFiles(OpenFilesEvent ofevent) {
157 fileObjects = ofevent.getFiles();
158 selectedFiles.addAll(Arrays.asList(fileObjects));
159 for (int i = 0; i< selectedFiles.size(); i++) {
160 generalTable.setText(i+1, 0, "File");
161 generalTable.setText(i+1, 1, selectedFiles.get(i).getName());
162 ProgressBar progress = new ProgressBar(20, 0);
163 generalTable.setWidget(i+1, 2, progress);
164 progressBars.add(progress);
165 generalTable.getCellFormatter().setStyleName(i+1, 0, "props-labels");
166 generalTable.getCellFormatter().setStyleName(i+1, 1, "props-values");
168 submit.setEnabled(true);
175 panel.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER);
176 panel.addStyleName("gss-DialogBox");
177 addStyleName("gss-DialogBox");
182 * Cancels the file upload.
184 private void cancelUpload() {
185 for (HttpRequest request: requests)
191 * Check whether the specified file name exists in the selected folder.
193 private boolean canContinue(File file) {
194 String fileName = getFilename(file.getName());
195 if (getFileForName(fileName) == null)
196 // For file creation, check to see if the file already exists.
197 for (FileResource fileRes : files)
198 if (!fileRes.isDeleted() && fileRes.getName().equals(fileName))
204 public void prepareAndSubmit() {
206 if (selectedFiles.size() == 0) {
207 app.displayError("You must select a file!");
211 for (File file: selectedFiles)
212 if (!canContinue(file)) {
213 app.displayError("The file name " + file.getName() +
214 " already exists in this folder");
218 submit.setEnabled(false);
219 browse.setVisible(false);
220 List<String> toUpdate = new ArrayList<String>();
221 toRename = new HashMap<String, FileResource>();
222 for (File file: selectedFiles) {
223 String fname = getFilename(file.getName());
224 if (getFileForName(fname) == null) {
225 // We are going to create a file, so we check to see if there is a
226 // trashed file with the same name.
227 FileResource same = null;
228 for (FileResource fres : folder.getFiles())
229 if (fres.isDeleted() && fres.getName().equals(fname))
231 // In that case add it to the list of files to rename.
233 toRename.put(getBackupFilename(fname), same);
235 // If we are updating a file add it to the list of files to update.
239 if (!toUpdate.isEmpty()) {
240 StringBuffer sb = new StringBuffer();
241 for (String name: toUpdate)
242 sb.append(name).append("<br/>");
243 // We are going to update existing files, so show a confirmation dialog.
244 ConfirmationDialog confirm = new ConfirmationDialog("Are you sure " +
245 "you want to update the following files?<br/><i>" + sb +
249 public void cancel() {
254 public void confirm() {
265 * Confirm the renames of synonymous files already in the trash.
267 private void confirmRename() {
268 if (!toRename.isEmpty()) {
269 StringBuffer sb = new StringBuffer();
270 for (FileResource file: toRename.values())
271 sb.append(file.getName()).append("<br/>");
272 ConfirmationDialog confirm = new ConfirmationDialog("Files " +
273 "with the following names already exist in the trash. If" +
274 " you continue,<br/>the trashed files will be renamed " +
275 "automatically for you:<br/><i>" + sb + "</i>", "Continue") {
278 public void cancel() {
283 public void confirm() {
284 updateTrashedFiles();
294 * Rename the conflicting trashed files with the supplied new names.
296 private void updateTrashedFiles() {
297 for (final String name: toRename.keySet()) {
298 JSONObject json = new JSONObject();
299 json.put("name", new JSONString(name));
300 PostCommand cf = new PostCommand(toRename.get(name).getUri() + "?update=", json.toString(), 200) {
303 public void onComplete() {
304 toRename.remove(name);
309 public void onError(Throwable t) {
312 if (t instanceof RestException) {
313 int statusCode = ((RestException) t).getHttpStatusCode();
314 if (statusCode == 405)
315 app.displayError("You don't have the necessary permissions");
316 else if (statusCode == 404)
317 app.displayError("User in permissions does not exist");
318 else if (statusCode == 409)
319 app.displayError("A file with the same name already exists");
320 else if (statusCode == 413)
321 app.displayError("Your quota has been exceeded");
323 app.displayError("Unable to modify file:" + ((RestException) t).getHttpStatusText());
325 app.displayError("System error modifying file:" + t.getMessage());
329 DeferredCommand.addCommand(cf);
334 * Checks if the renaming step for already trashed files is complete and
335 * starts file uploads.
337 private void uploadFiles() {
338 if (!toRename.isEmpty()) return;
339 for (int i = 0; i< fileObjects.length; i++) {
341 DeferredCommand.addCommand(new Command() {
343 public void execute() {
344 doSend(fileObjects[index], index);
351 * Perform the HTTP request to upload the specified file.
353 protected void doSend(final File file, final int index) {
354 final GSS app = GSS.get();
355 HttpRequest request = factory.createHttpRequest();
356 requests.add(request);
357 String method = "PUT";
360 final String filename = getFilename(file.getName());
361 path = folder.getUri();
362 if (!path.endsWith("/"))
364 path = path + encode(filename);
366 String token = app.getToken();
367 String resource = path.substring(app.getApiPath().length()-1, path.length());
368 String date = RestCommand.getDate();
369 String sig = RestCommand.calculateSig(method, date, resource, RestCommand.base64decode(token));
370 request.open(method, path);
371 request.setRequestHeader("X-GSS-Date", date);
372 request.setRequestHeader("Authorization", app.getCurrentUserResource().getUsername() + " " + sig);
373 request.setRequestHeader("Accept", "application/json; charset=utf-8");
374 request.setCallback(new RequestCallback() {
376 public void onResponseReceived(HttpRequest req) {
377 int state = req.getReadyState();
378 if (state != 4) return;
379 switch(req.getStatus()) {
380 case 201: // Created falls through to updated.
382 selectedFiles.remove(file);
386 SessionExpiredDialog dlg = new SessionExpiredDialog();
390 app.displayError("You don't have permission to " +
391 "upload file " + filename);
394 app.displayError("A folder with the name " + filename +
395 " already exists at this level");
398 app.displayError("There is not enough free space " +
399 "available for uploading " + filename);
402 app.displayError("Error uploading file " + filename +
403 ": " + req.getStatus());
407 request.getUpload().setProgressHandler(new ProgressHandler() {
409 public void onProgress(ProgressEvent event) {
410 double pcnt = (double) event.getLoaded() / event.getTotal();
411 progressBars.get(index).setProgress((int) Math.floor(pcnt * 100));
414 request.send(file.getBlob());
418 * Perform the final actions after the files are uploaded.
420 protected void finish() {
421 if (!selectedFiles.isEmpty()) return;
423 GSS.get().showFileList(true);
424 GSS.get().getStatusPanel().updateStats();
428 * Same as URL.encode, but also encode apostrophe since browsers aren't
429 * consistent about it (FF encodes, IE does not).
431 protected String encode(String decodedURL) {
432 String retv = decodedURL.replaceAll("@", "_"); // Replace bad character
433 retv = URL.encodeComponent(retv);
434 retv = retv.replaceAll("'", "%27");