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.DeferredCommand;
48 import com.google.gwt.user.client.ui.Button;
49 import com.google.gwt.user.client.ui.FlexTable;
50 import com.google.gwt.user.client.ui.HTML;
51 import com.google.gwt.user.client.ui.HasHorizontalAlignment;
52 import com.google.gwt.user.client.ui.HorizontalPanel;
53 import com.google.gwt.user.client.ui.VerticalPanel;
56 * The 'File upload' dialog box implementation with Google Gears support.
58 public class FileUploadGearsDialog extends FileUploadDialog implements Updateable {
60 protected final Factory factory = Factory.getInstance();
63 * The array of files to upload.
65 private File[] fileObjects;
68 * A list of files to upload, created from files array. Used to signal
69 * finished state when empty.
71 protected List<File> selectedFiles = new ArrayList<File>();
74 * The list of progress bars for individual files.
76 protected List<ProgressBar> progressBars = new ArrayList<ProgressBar>();
78 private Button browse;
80 private Button submit;
82 private FlexTable generalTable;
84 private Map<String, FileResource> toRename;
86 protected List<HttpRequest> requests = new ArrayList<HttpRequest>();
88 private boolean canContinue = true;
91 * The widget's constructor.
93 public FileUploadGearsDialog() {
94 // Set the dialog's caption.
95 setText("File upload");
96 setAnimationEnabled(true);
97 // Create a panel to hold all of the dialog widgets.
98 VerticalPanel panel = new VerticalPanel();
99 final HTML info = new HTML("You may select one or more files to upload.");
100 info.addStyleName("gss-uploadNote");
102 // Add an informative label with the folder name.
103 Object selection = GSS.get().getFolders().getCurrent().getUserObject();
104 folder = (FolderResource) selection;
106 browse = new Button("Browse...");
108 HorizontalPanel fileUploadPanel = new HorizontalPanel();
109 fileUploadPanel.add(browse);
111 generalTable = new FlexTable();
112 generalTable.setText(0, 0, "Folder");
113 generalTable.setText(1, 0, "File");
114 generalTable.setText(0, 1, folder.getName());
115 generalTable.setWidget(1, 1, fileUploadPanel);
116 generalTable.getCellFormatter().setStyleName(0, 0, "props-labels");
117 generalTable.getCellFormatter().setStyleName(1, 0, "props-labels");
118 generalTable.getCellFormatter().setStyleName(0, 1, "props-values");
119 generalTable.getCellFormatter().setStyleName(1, 1, "props-values");
120 generalTable.setCellSpacing(4);
122 panel.add(generalTable);
124 // Create a panel to hold the buttons.
125 HorizontalPanel buttons = new HorizontalPanel();
127 submit = new Button("Upload");
128 submit.addClickHandler(new ClickHandler() {
130 public void onClick(ClickEvent event) {
134 submit.setEnabled(false);
136 buttons.setCellHorizontalAlignment(submit, HasHorizontalAlignment.ALIGN_CENTER);
137 // Create the 'Cancel' button, along with a listener that hides the
138 // dialog when the button is clicked.
139 Button cancel = new Button("Cancel", new ClickHandler() {
141 public void onClick(ClickEvent event) {
144 GSS.get().showFileList(true);
148 buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);
149 buttons.setSpacing(8);
150 buttons.addStyleName("gss-DialogBox");
152 browse.addClickHandler(new ClickHandler() {
154 public void onClick(ClickEvent event) {
155 Desktop desktop = factory.createDesktop();
156 desktop.openFiles(new OpenFilesHandler() {
159 public void onOpenFiles(OpenFilesEvent ofevent) {
160 fileObjects = ofevent.getFiles();
161 selectedFiles.addAll(Arrays.asList(fileObjects));
162 for (int i = 0; i< selectedFiles.size(); i++) {
163 generalTable.setText(i+1, 0, "File");
164 generalTable.setText(i+1, 1, selectedFiles.get(i).getName());
165 ProgressBar progress = new ProgressBar(20, 0);
166 generalTable.setWidget(i+1, 2, progress);
167 progressBars.add(progress);
168 generalTable.getCellFormatter().setStyleName(i+1, 0, "props-labels");
169 generalTable.getCellFormatter().setStyleName(i+1, 1, "props-values");
171 submit.setEnabled(true);
178 panel.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER);
179 panel.addStyleName("gss-DialogBox");
180 addStyleName("gss-DialogBox");
185 * Cancels the file upload.
187 private void cancelUpload() {
188 for (HttpRequest request: requests)
194 * Check whether the specified file name exists in the selected folder.
196 private boolean canContinue(File file) {
197 String fileName = getFilename(file.getName());
198 if (getFileForName(fileName) == null)
199 // For file creation, check to see if the file already exists.
200 for (FileResource fileRes : files)
201 if (!fileRes.isDeleted() && fileRes.getName().equals(fileName))
207 public void prepareAndSubmit() {
209 if (selectedFiles.size() == 0) {
210 app.displayError("You must select a file!");
214 for (File file: selectedFiles)
215 if (!canContinue(file)) {
216 app.displayError("The file name " + file.getName() +
217 " already exists in this folder");
221 submit.setEnabled(false);
222 browse.setVisible(false);
223 List<String> toUpdate = new ArrayList<String>();
224 toRename = new HashMap<String, FileResource>();
225 for (File file: selectedFiles) {
226 String fname = getFilename(file.getName());
227 if (getFileForName(fname) == null) {
228 // We are going to create a file, so we check to see if there is a
229 // trashed file with the same name.
230 FileResource same = null;
231 for (FileResource fres : folder.getFiles())
232 if (fres.isDeleted() && fres.getName().equals(fname))
234 // In that case add it to the list of files to rename.
236 toRename.put(getBackupFilename(fname), same);
238 // If we are updating a file add it to the list of files to update.
242 if (!toUpdate.isEmpty()) {
243 StringBuffer sb = new StringBuffer();
244 for (String name: toUpdate)
245 sb.append(name).append("<br/>");
246 // We are going to update existing files, so show a confirmation dialog.
247 ConfirmationDialog confirm = new ConfirmationDialog("Are you sure " +
248 "you want to update the following files?<br/><i>" + sb +
252 public void cancel() {
257 public void confirm() {
268 * Confirm the renames of synonymous files already in the trash.
270 private void confirmRename() {
271 if (!toRename.isEmpty()) {
272 StringBuffer sb = new StringBuffer();
273 for (FileResource file: toRename.values())
274 sb.append(file.getName()).append("<br/>");
275 ConfirmationDialog confirm = new ConfirmationDialog("Files " +
276 "with the following names already exist in the trash. If" +
277 " you continue,<br/>the trashed files will be renamed " +
278 "automatically for you:<br/><i>" + sb + "</i>", "Continue") {
281 public void cancel() {
286 public void confirm() {
287 updateTrashedFiles();
297 * Rename the conflicting trashed files with the supplied new names.
299 private void updateTrashedFiles() {
300 for (final String name: toRename.keySet()) {
301 JSONObject json = new JSONObject();
302 json.put("name", new JSONString(name));
303 PostCommand cf = new PostCommand(toRename.get(name).getUri() + "?update=", json.toString(), 200) {
306 public void onComplete() {
307 toRename.remove(name);
312 public void onError(Throwable t) {
315 if (t instanceof RestException) {
316 int statusCode = ((RestException) t).getHttpStatusCode();
317 if (statusCode == 405)
318 app.displayError("You don't have the necessary permissions");
319 else if (statusCode == 404)
320 app.displayError("User in permissions does not exist");
321 else if (statusCode == 409)
322 app.displayError("A file with the same name already exists");
323 else if (statusCode == 413)
324 app.displayError("Your quota has been exceeded");
326 app.displayError("Unable to modify file:" + ((RestException) t).getHttpStatusText());
328 app.displayError("System error modifying file:" + t.getMessage());
332 DeferredCommand.addCommand(cf);
337 * Checks if the renaming step for already trashed files is complete and
338 * starts file uploads.
340 private void uploadFiles() {
341 if (!toRename.isEmpty()) return;
343 doSend(selectedFiles);
348 * Perform the HTTP request to upload the specified file.
350 protected void doSend(final List<File> filesRemaining) {
351 final GSS app = GSS.get();
352 HttpRequest request = factory.createHttpRequest();
353 requests.add(request);
354 String method = "PUT";
357 final String filename = getFilename(filesRemaining.get(0).getName());
358 path = folder.getUri();
359 if (!path.endsWith("/"))
361 path = path + encode(filename);
363 String token = app.getToken();
364 String resource = path.substring(app.getApiPath().length()-1, path.length());
365 String date = RestCommand.getDate();
366 String sig = RestCommand.calculateSig(method, date, resource, RestCommand.base64decode(token));
367 request.open(method, path);
368 request.setRequestHeader("X-GSS-Date", date);
369 request.setRequestHeader("Authorization", app.getCurrentUserResource().getUsername() + " " + sig);
370 request.setRequestHeader("Accept", "application/json; charset=utf-8");
371 request.setCallback(new RequestCallback() {
373 public void onResponseReceived(HttpRequest req) {
374 int state = req.getReadyState();
375 if (state != 4) return;
376 switch(req.getStatus()) {
377 case 201: // Created falls through to updated.
379 filesRemaining.remove(0);
380 if(filesRemaining.isEmpty()){
384 doSend(filesRemaining);
387 SessionExpiredDialog dlg = new SessionExpiredDialog();
391 app.displayError("You don't have permission to " +
392 "upload file " + filename);
395 app.displayError("A folder with the name " + filename +
396 " already exists at this level");
399 app.displayError("There is not enough free space " +
400 "available for uploading " + filename);
403 app.displayError("Error uploading file " + filename +
404 ": " + req.getStatus());
408 request.getUpload().setProgressHandler(new ProgressHandler() {
410 public void onProgress(ProgressEvent event) {
411 double pcnt = (double) event.getLoaded() / event.getTotal();
412 progressBars.get(0).setProgress((int) Math.floor(pcnt * 100));
414 progressBars.remove(0);
417 request.send(filesRemaining.get(0).getBlob());
421 * Perform the final actions after the files are uploaded.
423 protected void finish() {
425 GSS.get().showFileList(true);
426 GSS.get().getStatusPanel().updateStats();
430 * Same as URL.encode, but also encode apostrophe since browsers aren't
431 * consistent about it (FF encodes, IE does not).
433 protected String encode(String decodedURL) {
434 String retv = decodedURL.replaceAll("@", "_"); // Replace bad character
435 retv = URL.encodeComponent(retv);
436 retv = retv.replaceAll("'", "%27");