code.grnet.gr Git - pithos-web-client/blob - src/gr/grnet/pithos/web/client/Pithos.java

   1 /*
   2  * Copyright 2011-2012 GRNET S.A. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or
   5  * without modification, are permitted provided that the following
   6  * conditions are met:
   7  *
   8  *   1. Redistributions of source code must retain the above
   9  *      copyright notice, this list of conditions and the following
  10  *      disclaimer.
  11  *
  12  *   2. Redistributions in binary form must reproduce the above
  13  *      copyright notice, this list of conditions and the following
  14  *      disclaimer in the documentation and/or other materials
  15  *      provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
  18  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  20  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
  21  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  23  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  24  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  25  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  27  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  * The views and conclusions contained in the software and
  31  * documentation are those of the authors and should not be
  32  * interpreted as representing official policies, either expressed
  33  * or implied, of GRNET S.A.
  34  */
  35 package gr.grnet.pithos.web.client;
  36
  37 import gr.grnet.pithos.web.client.commands.UploadFileCommand;
  38 import gr.grnet.pithos.web.client.foldertree.AccountResource;
  39 import gr.grnet.pithos.web.client.foldertree.File;
  40 import gr.grnet.pithos.web.client.foldertree.Folder;
  41 import gr.grnet.pithos.web.client.foldertree.FolderTreeView;
  42 import gr.grnet.pithos.web.client.foldertree.FolderTreeViewModel;
  43 import gr.grnet.pithos.web.client.foldertree.Resource;
  44 import gr.grnet.pithos.web.client.grouptree.Group;
  45 import gr.grnet.pithos.web.client.grouptree.GroupTreeView;
  46 import gr.grnet.pithos.web.client.grouptree.GroupTreeViewModel;
  47 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeView;
  48 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeViewModel;
  49 import gr.grnet.pithos.web.client.othersharedtree.OtherSharedTreeView;
  50 import gr.grnet.pithos.web.client.othersharedtree.OtherSharedTreeViewModel;
  51 import gr.grnet.pithos.web.client.rest.DeleteRequest;
  52 import gr.grnet.pithos.web.client.rest.GetRequest;
  53 import gr.grnet.pithos.web.client.rest.HeadRequest;
  54 import gr.grnet.pithos.web.client.rest.PutRequest;
  55 import gr.grnet.pithos.web.client.rest.RestException;
  56
  57 import java.util.ArrayList;
  58 import java.util.HashMap;
  59 import java.util.Iterator;
  60 import java.util.List;
  61 import java.util.Set;
  62
  63 import com.google.gwt.core.client.EntryPoint;
  64 import com.google.gwt.core.client.GWT;
  65 import com.google.gwt.core.client.Scheduler;
  66 import com.google.gwt.core.client.Scheduler.RepeatingCommand;
  67 import com.google.gwt.core.client.Scheduler.ScheduledCommand;
  68 import com.google.gwt.event.dom.client.ClickEvent;
  69 import com.google.gwt.event.dom.client.ClickHandler;
  70 import com.google.gwt.event.logical.shared.ResizeEvent;
  71 import com.google.gwt.event.logical.shared.ResizeHandler;
  72 import com.google.gwt.http.client.Request;
  73 import com.google.gwt.http.client.RequestBuilder;
  74 import com.google.gwt.http.client.RequestCallback;
  75 import com.google.gwt.http.client.RequestException;
  76 import com.google.gwt.http.client.Response;
  77 import com.google.gwt.http.client.URL;
  78 import com.google.gwt.i18n.client.Dictionary;
  79 import com.google.gwt.i18n.client.NumberFormat;
  80 import com.google.gwt.json.client.JSONArray;
  81 import com.google.gwt.json.client.JSONObject;
  82 import com.google.gwt.json.client.JSONParser;
  83 import com.google.gwt.json.client.JSONString;
  84 import com.google.gwt.json.client.JSONValue;
  85 import com.google.gwt.resources.client.ImageResource;
  86 import com.google.gwt.resources.client.ImageResource.ImageOptions;
  87 import com.google.gwt.user.client.Command;
  88 import com.google.gwt.user.client.Cookies;
  89 import com.google.gwt.user.client.Event;
  90 import com.google.gwt.user.client.History;
  91 import com.google.gwt.user.client.Window;
  92 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  93 import com.google.gwt.user.client.ui.Button;
  94 import com.google.gwt.user.client.ui.Composite;
  95 import com.google.gwt.user.client.ui.HTML;
  96 import com.google.gwt.user.client.ui.HasHorizontalAlignment;
  97 import com.google.gwt.user.client.ui.HasVerticalAlignment;
  98 import com.google.gwt.user.client.ui.HorizontalPanel;
  99 import com.google.gwt.user.client.ui.HorizontalSplitPanel;
 100 import com.google.gwt.user.client.ui.RootPanel;
 101 import com.google.gwt.user.client.ui.VerticalPanel;
 102 import com.google.gwt.view.client.SelectionChangeEvent;
 103 import com.google.gwt.view.client.SelectionChangeEvent.Handler;
 104 import com.google.gwt.view.client.SingleSelectionModel;
 105
 106 /**
 107  * Entry point classes define <code>onModuleLoad()</code>.
 108  */
 109 public class Pithos implements EntryPoint, ResizeHandler {
 110
 111         public static final String HOME_CONTAINER = "pithos";
 112
 113         public static final String TRASH_CONTAINER = "trash";
 114
 115         public static final Configuration config = GWT.create(Configuration.class);
 116
 117         /**
 118          * Instantiate an application-level image bundle. This object will provide
 119          * programmatic access to all the images needed by widgets.
 120          */
 121         static Images images = (Images) GWT.create(Images.class);
 122
 123     public String getUsername() {
 124         return username;
 125     }
 126
 127     public void setAccount(AccountResource acct) {
 128         account = acct;
 129     }
 130
 131     public AccountResource getAccount() {
 132         return account;
 133     }
 134
 135     public void updateFolder(Folder f, boolean showfiles, Command callback, final boolean openParent) {
 136         folderTreeView.updateFolder(f, showfiles, callback, openParent);
 137     }
 138
 139     public void updateGroupNode(Group group) {
 140         groupTreeView.updateGroupNode(group);
 141     }
 142
 143     public void updateMySharedRoot() {
 144         mysharedTreeView.updateRoot();
 145     }
 146
 147     public void updateSharedFolder(Folder f, boolean showfiles) {
 148         mysharedTreeView.updateFolder(f, showfiles);
 149     }
 150
 151     public void updateOtherSharedFolder(Folder f, boolean showfiles) {
 152         otherSharedTreeView.updateFolder(f, showfiles);
 153     }
 154
 155     public MysharedTreeView getMySharedTreeView() {
 156         return mysharedTreeView;
 157     }
 158
 159     /**
 160          * An aggregate image bundle that pulls together all the images for this
 161          * application into a single bundle.
 162          */
 163         public interface Images extends TopPanel.Images, FileList.Images, ToolsMenu.Images {
 164
 165                 @Source("gr/grnet/pithos/resources/document.png")
 166                 ImageResource folders();
 167
 168                 @Source("gr/grnet/pithos/resources/advancedsettings.png")
 169                 @ImageOptions(width=32, height=32)
 170                 ImageResource tools();
 171         }
 172
 173         private Throwable error;
 174
 175         /**
 176          * The Application Clipboard implementation;
 177          */
 178         private Clipboard clipboard = new Clipboard();
 179
 180         /**
 181          * The top panel that contains the menu bar.
 182          */
 183         private TopPanel topPanel;
 184
 185         /**
 186          * The panel that contains the various system messages.
 187          */
 188         private MessagePanel messagePanel = new MessagePanel(this, Pithos.images);
 189
 190         /**
 191          * The bottom panel that contains the status bar.
 192          */
 193         private StatusPanel statusPanel = null;
 194
 195         /**
 196          * The file list widget.
 197          */
 198         private FileList fileList;
 199
 200         /**
 201          * The tab panel that occupies the right side of the screen.
 202          */
 203         private VerticalPanel inner = new VerticalPanel();
 204
 205
 206         /**
 207          * The split panel that will contain the left and right panels.
 208          */
 209         private HorizontalSplitPanel splitPanel = new HorizontalSplitPanel();
 210
 211         /**
 212          * The currently selected item in the application, for use by the Edit menu
 213          * commands. Potential types are Folder, File, User and Group.
 214          */
 215         private Object currentSelection;
 216
 217         public HashMap<String, String> userFullNameMap = new HashMap<String, String>();
 218
 219     private String username = null;
 220
 221     /**
 222      * The authentication token of the current user.
 223      */
 224     private String token;
 225
 226     VerticalPanel trees;
 227
 228     SingleSelectionModel<Folder> folderTreeSelectionModel;
 229     FolderTreeViewModel folderTreeViewModel;
 230     FolderTreeView folderTreeView;
 231
 232     SingleSelectionModel<Folder> mysharedTreeSelectionModel;
 233     MysharedTreeViewModel mysharedTreeViewModel;
 234     MysharedTreeView mysharedTreeView = null;;
 235
 236     protected SingleSelectionModel<Folder> otherSharedTreeSelectionModel;
 237     OtherSharedTreeViewModel otherSharedTreeViewModel;
 238     OtherSharedTreeView otherSharedTreeView = null;
 239
 240     GroupTreeViewModel groupTreeViewModel;
 241     private GroupTreeView groupTreeView;
 242
 243     TreeView selectedTree;
 244     protected AccountResource account;
 245
 246     Folder trash;
 247
 248     List<Composite> treeViews = new ArrayList<Composite>();
 249
 250     @SuppressWarnings("rawtypes") List<SingleSelectionModel> selectionModels = new ArrayList<SingleSelectionModel>();
 251
 252     Button upload;
 253
 254     private HTML usedBytes;
 255
 256     private HTML totalBytes;
 257
 258     private HTML usedPercent;
 259
 260     private HTML numOfFiles;
 261
 262     private Toolbar toolbar;
 263
 264     private FileUploadDialog fileUploadDialog;
 265
 266         @Override
 267         public void onModuleLoad() {
 268                 if (parseUserCredentials())
 269             initialize();
 270         }
 271
 272     private void initialize() {
 273         boolean bareContent = Window.Location.getParameter("noframe") != null;
 274         String contentWidth = bareContent ? "100%" : "75%";
 275
 276         VerticalPanel outer = new VerticalPanel();
 277         outer.setWidth("100%");
 278         if (!bareContent) {
 279                 outer.addStyleName("pithos-outer");
 280         }
 281
 282         if (!bareContent) {
 283                 topPanel = new TopPanel(this, Pithos.images);
 284                 topPanel.setWidth("100%");
 285                 outer.add(topPanel);
 286                 outer.setCellHorizontalAlignment(topPanel, HasHorizontalAlignment.ALIGN_CENTER);
 287         }
 288
 289         messagePanel.setVisible(false);
 290         outer.add(messagePanel);
 291         outer.setCellHorizontalAlignment(messagePanel, HasHorizontalAlignment.ALIGN_CENTER);
 292         outer.setCellVerticalAlignment(messagePanel, HasVerticalAlignment.ALIGN_MIDDLE);
 293
 294         HorizontalPanel header = new HorizontalPanel();
 295         header.addStyleName("pithos-header");
 296         header.setWidth(contentWidth);
 297         if (bareContent)
 298                 header.addStyleName("pithos-header-noframe");
 299         upload = new Button("Upload", new ClickHandler() {
 300             @Override
 301             public void onClick(ClickEvent event) {
 302                 if (getSelection() != null)
 303                         new UploadFileCommand(Pithos.this, null, getSelection()).execute();
 304             }
 305         });
 306         upload.addStyleName("pithos-uploadButton");
 307         header.add(upload);
 308         header.setCellHorizontalAlignment(upload, HasHorizontalAlignment.ALIGN_LEFT);
 309         header.setCellVerticalAlignment(upload, HasVerticalAlignment.ALIGN_MIDDLE);
 310
 311         toolbar = new Toolbar(this);
 312         header.add(toolbar);
 313         header.setCellHorizontalAlignment(toolbar, HasHorizontalAlignment.ALIGN_CENTER);
 314         header.setCellVerticalAlignment(toolbar, HasVerticalAlignment.ALIGN_MIDDLE);
 315
 316         HorizontalPanel folderStatistics = new HorizontalPanel();
 317         folderStatistics.addStyleName("pithos-folderStatistics");
 318         numOfFiles = new HTML();
 319         folderStatistics.add(numOfFiles);
 320         folderStatistics.setCellVerticalAlignment(numOfFiles, HasVerticalAlignment.ALIGN_MIDDLE);
 321         HTML numOfFilesLabel = new HTML("&nbsp;Files");
 322         folderStatistics.add(numOfFilesLabel);
 323         folderStatistics.setCellVerticalAlignment(numOfFilesLabel, HasVerticalAlignment.ALIGN_MIDDLE);
 324         header.add(folderStatistics);
 325         header.setCellHorizontalAlignment(folderStatistics, HasHorizontalAlignment.ALIGN_RIGHT);
 326         header.setCellVerticalAlignment(folderStatistics, HasVerticalAlignment.ALIGN_MIDDLE);
 327         header.setCellWidth(folderStatistics, "40px");
 328         outer.add(header);
 329         outer.setCellHorizontalAlignment(header, HasHorizontalAlignment.ALIGN_CENTER);
 330         // Inner contains the various lists.nner
 331         inner.sinkEvents(Event.ONCONTEXTMENU);
 332         inner.setWidth("100%");
 333
 334         folderTreeSelectionModel = new SingleSelectionModel<Folder>();
 335         folderTreeSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
 336             @Override
 337             public void onSelectionChange(SelectionChangeEvent event) {
 338                 if (folderTreeSelectionModel.getSelectedObject() != null) {
 339                     deselectOthers(folderTreeView, folderTreeSelectionModel);
 340                     applyPermissions(folderTreeSelectionModel.getSelectedObject());
 341                     Folder f = folderTreeSelectionModel.getSelectedObject();
 342                         updateFolder(f, true, new Command() {
 343
 344                                 @Override
 345                                 public void execute() {
 346                                         updateStatistics();
 347                                 }
 348                         }, true);
 349                         showRelevantToolbarButtons();
 350                 }
 351                                 else {
 352                                         if (getSelectedTree().equals(folderTreeView))
 353                                                 setSelectedTree(null);
 354                                         if (getSelectedTree() == null)
 355                                                 showRelevantToolbarButtons();
 356                                 }
 357             }
 358         });
 359         selectionModels.add(folderTreeSelectionModel);
 360
 361         folderTreeViewModel = new FolderTreeViewModel(this, folderTreeSelectionModel);
 362         folderTreeView = new FolderTreeView(folderTreeViewModel);
 363         treeViews.add(folderTreeView);
 364
 365         fileList = new FileList(this, images, folderTreeView);
 366         inner.add(fileList);
 367
 368         groupTreeViewModel = new GroupTreeViewModel(this);
 369         groupTreeView = new GroupTreeView(groupTreeViewModel);
 370         treeViews.add(groupTreeView);
 371
 372         trees = new VerticalPanel();
 373         trees.setWidth("100%");
 374
 375
 376         HorizontalPanel treeHeader = new HorizontalPanel();
 377         treeHeader.addStyleName("pithos-treeHeader");
 378         treeHeader.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_CENTER);
 379         treeHeader.setVerticalAlignment(HasVerticalAlignment.ALIGN_MIDDLE);
 380         HorizontalPanel statistics = new HorizontalPanel();
 381         statistics.addStyleName("pithos-statistics");
 382         statistics.add(new HTML("Used:&nbsp;"));
 383         usedBytes = new HTML();
 384         statistics.add(usedBytes);
 385         statistics.add(new HTML("&nbsp;of&nbsp;"));
 386         totalBytes = new HTML();
 387         statistics.add(totalBytes);
 388         statistics.add(new HTML("&nbsp;("));
 389         usedPercent = new HTML();
 390         statistics.add(usedPercent);
 391         statistics.add(new HTML(")"));
 392         treeHeader.add(statistics);
 393         treeHeader.setCellHorizontalAlignment(statistics, HasHorizontalAlignment.ALIGN_LEFT);
 394         trees.add(treeHeader);
 395
 396         trees.add(folderTreeView);
 397         trees.add(groupTreeView);
 398         // Add the left and right panels to the split panel.
 399         splitPanel.setLeftWidget(trees);
 400         splitPanel.setRightWidget(inner);
 401         splitPanel.setSplitPosition("35%");
 402         splitPanel.setSize("100%", "100%");
 403         splitPanel.addStyleName("pithos-splitPanel");
 404         splitPanel.setWidth(contentWidth);
 405         outer.add(splitPanel);
 406         outer.setCellHorizontalAlignment(splitPanel, HasHorizontalAlignment.ALIGN_CENTER);
 407
 408         if (!bareContent) {
 409                 statusPanel = new StatusPanel();
 410                 statusPanel.setWidth("100%");
 411                 outer.add(statusPanel);
 412                 outer.setCellHorizontalAlignment(statusPanel, HasHorizontalAlignment.ALIGN_CENTER);
 413         }
 414         else
 415                 splitPanel.addStyleName("pithos-splitPanel-noframe");
 416
 417         // Hook the window resize event, so that we can adjust the UI.
 418         Window.addResizeHandler(this);
 419         // Clear out the window's built-in margin, because we want to take
 420         // advantage of the entire client area.
 421         Window.setMargin("0px");
 422         // Finally, add the outer panel to the RootPanel, so that it will be
 423         // displayed.
 424         RootPanel.get().add(outer);
 425         // Call the window resized handler to get the initial sizes setup. Doing
 426         // this in a deferred command causes it to occur after all widgets'
 427         // sizes have been computed by the browser.
 428         Scheduler.get().scheduleDeferred(new ScheduledCommand() {
 429
 430             @Override
 431             public void execute() {
 432                 onWindowResized(Window.getClientHeight());
 433             }
 434         });
 435
 436         Scheduler.get().scheduleDeferred(new ScheduledCommand() {
 437             @Override
 438             public void execute() {
 439                 fetchAccount(new Command() {
 440
 441                                         @Override
 442                                         public void execute() {
 443                                 if (!account.hasHomeContainer())
 444                                     createHomeContainer(account, this);
 445                                 else if (!account.hasTrashContainer())
 446                                         createTrashContainer(this);
 447                                 else {
 448                                         for (Folder f : account.getContainers())
 449                                                 if (f.getName().equals(Pithos.TRASH_CONTAINER)) {
 450                                                         trash = f;
 451                                                         break;
 452                                                 }
 453                                     folderTreeViewModel.initialize(account, new Command() {
 454
 455                                                                 @Override
 456                                                                 public void execute() {
 457                                                     createMySharedTree();
 458                                                                 }
 459                                                         });
 460                                     groupTreeViewModel.initialize();
 461                                     showStatistics();
 462                                 }
 463                                         }
 464                                 });
 465             }
 466         });
 467
 468         Scheduler.get().scheduleFixedDelay(new RepeatingCommand() {
 469
 470                         @Override
 471                         public boolean execute() {
 472                                 Folder f = getSelection();
 473                                 if (f != null) {
 474                                         if (getSelectedTree().equals(folderTreeView))
 475                                                 updateFolder(f, true, null, false);
 476                                         else if (getSelectedTree().equals(mysharedTreeView))
 477                                                 updateSharedFolder(f, true);
 478                                 }
 479                                 return true;
 480                         }
 481                 }, 3000);
 482     }
 483
 484     public void applyPermissions(Folder f) {
 485         if (f != null) {
 486                 if (f.isInTrash())
 487                         upload.setEnabled(false);
 488                 else {
 489                         Boolean[] perms = f.getPermissions().get(username);
 490                         if (f.getOwner().equals(username) || (perms != null && perms[1] != null && perms[1])) {
 491                                 upload.setEnabled(true);
 492                         }
 493                         else
 494                                 upload.setEnabled(false);
 495                 }
 496         }
 497         else
 498                 upload.setEnabled(false);
 499         }
 500
 501         @SuppressWarnings({ "rawtypes", "unchecked" })
 502         public void deselectOthers(TreeView _selectedTree, SingleSelectionModel model) {
 503         selectedTree = _selectedTree;
 504
 505         for (Composite c : treeViews)
 506                 if (c.equals(selectedTree))
 507                         c.addStyleName("cellTreeWidget-selectedTree");
 508                 else
 509                         c.removeStyleName("cellTreeWidget-selectedTree");
 510
 511         for (SingleSelectionModel s : selectionModels)
 512             if (!s.equals(model) && s.getSelectedObject() != null)
 513                 s.setSelected(s.getSelectedObject(), false);
 514     }
 515
 516     public void showFiles(final Folder f) {
 517         Set<File> files = f.getFiles();
 518         showFiles(files);
 519     }
 520
 521     public void showFiles(Set<File> files) {
 522         fileList.setFiles(new ArrayList<File>(files));
 523     }
 524
 525     /**
 526          * Parse and store the user credentials to the appropriate fields.
 527          */
 528         private boolean parseUserCredentials() {
 529         username = Window.Location.getParameter("user");
 530         token = Window.Location.getParameter("token");
 531         Configuration conf = (Configuration) GWT.create(Configuration.class);
 532                 Dictionary otherProperties = Dictionary.getDictionary("otherProperties");
 533         if (username == null || username.length() == 0 || token == null || token.length() == 0) {
 534             String cookie = otherProperties.get("authCookie");
 535             String auth = Cookies.getCookie(cookie);
 536             if (auth == null) {
 537                 authenticateUser();
 538                 return false;
 539             }
 540             if (auth.startsWith("\""))
 541                 auth = auth.substring(1);
 542             if (auth.endsWith("\""))
 543                 auth = auth.substring(0, auth.length() - 1);
 544                         String[] authSplit = auth.split("\\" + conf.cookieSeparator(), 2);
 545                         if (authSplit.length != 2) {
 546                             authenticateUser();
 547                             return false;
 548                         }
 549                         username = authSplit[0];
 550                         token = authSplit[1];
 551         }
 552         else
 553                 Cookies.setCookie(otherProperties.get("authCookie"), username + conf.cookieSeparator() + token, null, "", "/", false);
 554
 555         String gotoUrl = Window.Location.getParameter("goto");
 556                 if (gotoUrl != null && gotoUrl.length() > 0) {
 557                         Window.Location.assign(gotoUrl);
 558                         return false;
 559                 }
 560                 return true;
 561     }
 562
 563     /**
 564          * Redirect the user to the login page for authentication.
 565          */
 566         protected void authenticateUser() {
 567                 Dictionary otherProperties = Dictionary.getDictionary("otherProperties");
 568         Window.Location.assign(otherProperties.get("loginUrl") + Window.Location.getHref());
 569         }
 570
 571         protected void fetchAccount(final Command callback) {
 572         String path = "?format=json";
 573
 574         GetRequest<AccountResource> getAccount = new GetRequest<AccountResource>(AccountResource.class, getApiPath(), username, path) {
 575             @Override
 576             public void onSuccess(AccountResource _result) {
 577                 account = _result;
 578                 if (callback != null)
 579                         callback.execute();
 580             }
 581
 582             @Override
 583             public void onError(Throwable t) {
 584                 GWT.log("Error getting account", t);
 585                                 setError(t);
 586                 if (t instanceof RestException)
 587                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 588                 else
 589                     displayError("System error fetching user data: " + t.getMessage());
 590             }
 591
 592                         @Override
 593                         protected void onUnauthorized(Response response) {
 594                                 sessionExpired();
 595                         }
 596         };
 597         getAccount.setHeader("X-Auth-Token", token);
 598         Scheduler.get().scheduleDeferred(getAccount);
 599     }
 600
 601     public void updateStatistics() {
 602         HeadRequest<AccountResource> headAccount = new HeadRequest<AccountResource>(AccountResource.class, getApiPath(), username, "", account) {
 603
 604                         @Override
 605                         public void onSuccess(AccountResource _result) {
 606                                 showStatistics();
 607                         }
 608
 609                         @Override
 610                         public void onError(Throwable t) {
 611                 GWT.log("Error getting account", t);
 612                                 setError(t);
 613                 if (t instanceof RestException)
 614                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 615                 else
 616                     displayError("System error fetching user data: " + t.getMessage());
 617                         }
 618
 619                         @Override
 620                         protected void onUnauthorized(Response response) {
 621                                 sessionExpired();
 622                         }
 623                 };
 624                 headAccount.setHeader("X-Auth-Token", token);
 625                 Scheduler.get().scheduleDeferred(headAccount);
 626         }
 627
 628         protected void showStatistics() {
 629         usedBytes.setHTML(String.valueOf(account.getFileSizeAsString()));
 630         totalBytes.setHTML(String.valueOf(account.getQuotaAsString()));
 631         NumberFormat nf = NumberFormat.getPercentFormat();
 632         usedPercent.setHTML(nf.format(account.getUsedPercentage()));
 633         }
 634
 635         protected void createHomeContainer(final AccountResource _account, final Command callback) {
 636         String path = "/" + Pithos.HOME_CONTAINER;
 637         PutRequest createPithos = new PutRequest(getApiPath(), getUsername(), path) {
 638             @Override
 639             public void onSuccess(Resource result) {
 640                 if (!_account.hasTrashContainer())
 641                         createTrashContainer(callback);
 642                 else
 643                         fetchAccount(callback);
 644             }
 645
 646             @Override
 647             public void onError(Throwable t) {
 648                 GWT.log("Error creating pithos", t);
 649                                 setError(t);
 650                 if (t instanceof RestException)
 651                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 652                 else
 653                     displayError("System error Error creating pithos: " + t.getMessage());
 654             }
 655
 656                         @Override
 657                         protected void onUnauthorized(Response response) {
 658                                 sessionExpired();
 659                         }
 660         };
 661         createPithos.setHeader("X-Auth-Token", getToken());
 662         Scheduler.get().scheduleDeferred(createPithos);
 663     }
 664
 665     protected void createTrashContainer(final Command callback) {
 666         String path = "/" + Pithos.TRASH_CONTAINER;
 667         PutRequest createPithos = new PutRequest(getApiPath(), getUsername(), path) {
 668             @Override
 669             public void onSuccess(Resource result) {
 670                         fetchAccount(callback);
 671             }
 672
 673             @Override
 674             public void onError(Throwable t) {
 675                 GWT.log("Error creating pithos", t);
 676                                 setError(t);
 677                 if (t instanceof RestException)
 678                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 679                 else
 680                     displayError("System error Error creating pithos: " + t.getMessage());
 681             }
 682
 683                         @Override
 684                         protected void onUnauthorized(Response response) {
 685                                 sessionExpired();
 686                         }
 687         };
 688         createPithos.setHeader("X-Auth-Token", getToken());
 689         Scheduler.get().scheduleDeferred(createPithos);
 690     }
 691
 692     /**
 693          * Creates an HTML fragment that places an image & caption together, for use
 694          * in a group header.
 695          *
 696          * @param imageProto an image prototype for an image
 697          * @param caption the group caption
 698          * @return the header HTML fragment
 699          */
 700         private String createHeaderHTML(AbstractImagePrototype imageProto, String caption) {
 701                 String captionHTML = "<table class='caption' cellpadding='0' "
 702                 + "cellspacing='0'>" + "<tr><td class='lcaption'>" + imageProto.getHTML()
 703                 + "</td><td id =" + caption +" class='rcaption'><b style='white-space:nowrap'>&nbsp;"
 704                 + caption + "</b></td></tr></table>";
 705                 return captionHTML;
 706         }
 707
 708         protected void onWindowResized(int height) {
 709                 // Adjust the split panel to take up the available room in the window.
 710                 int newHeight = height - splitPanel.getAbsoluteTop();
 711                 if (newHeight < 1)
 712                         newHeight = 1;
 713                 splitPanel.setHeight("" + newHeight);
 714                 inner.setHeight("" + newHeight);
 715         }
 716
 717         @Override
 718         public void onResize(ResizeEvent event) {
 719                 int height = event.getHeight();
 720                 onWindowResized(height);
 721         }
 722
 723         /**
 724          * Display an error message.
 725          *
 726          * @param msg the message to display
 727          */
 728         public void displayError(String msg) {
 729                 messagePanel.displayError(msg);
 730         }
 731
 732         /**
 733          * Display a warning message.
 734          *
 735          * @param msg the message to display
 736          */
 737         public void displayWarning(String msg) {
 738                 messagePanel.displayWarning(msg);
 739         }
 740
 741         /**
 742          * Display an informational message.
 743          *
 744          * @param msg the message to display
 745          */
 746         public void displayInformation(String msg) {
 747                 messagePanel.displayInformation(msg);
 748         }
 749
 750         /**
 751          * Retrieve the fileList.
 752          *
 753          * @return the fileList
 754          */
 755         public FileList getFileList() {
 756                 return fileList;
 757         }
 758
 759         /**
 760          * Retrieve the topPanel.
 761          *
 762          * @return the topPanel
 763          */
 764         TopPanel getTopPanel() {
 765                 return topPanel;
 766         }
 767
 768         /**
 769          * Retrieve the clipboard.
 770          *
 771          * @return the clipboard
 772          */
 773         public Clipboard getClipboard() {
 774                 return clipboard;
 775         }
 776
 777         public StatusPanel getStatusPanel() {
 778                 return statusPanel;
 779         }
 780
 781         public String getToken() {
 782                 return token;
 783         }
 784
 785         public static native void preventIESelection() /*-{
 786                 $doc.body.onselectstart = function () { return false; };
 787         }-*/;
 788
 789         public static native void enableIESelection() /*-{
 790                 if ($doc.body.onselectstart != null)
 791                 $doc.body.onselectstart = null;
 792         }-*/;
 793
 794         /**
 795          * @return the absolute path of the API root URL
 796          */
 797         public String getApiPath() {
 798                 Configuration conf = (Configuration) GWT.create(Configuration.class);
 799                 return conf.apiPath();
 800         }
 801
 802         /**
 803          * History support for folder navigation
 804          * adds a new browser history entry
 805          *
 806          * @param key
 807          */
 808         public void updateHistory(String key){
 809 //              Replace any whitespace of the initial string to "+"
 810 //              String result = key.replaceAll("\\s","+");
 811 //              Add a new browser history entry.
 812 //              History.newItem(result);
 813                 History.newItem(key);
 814         }
 815
 816     public void deleteFolder(final Folder folder, final Command callback) {
 817         String path = getApiPath() + folder.getOwner() + "/" + folder.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(folder.getPrefix()) + "&t=" + System.currentTimeMillis();
 818         RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, path);
 819         builder.setHeader("X-Auth-Token", getToken());
 820         try {
 821             builder.sendRequest("", new RequestCallback() {
 822                 @Override
 823                 public void onResponseReceived(Request request, Response response) {
 824                     if (response.getStatusCode() == Response.SC_OK) {
 825                         JSONValue json = JSONParser.parseStrict(response.getText());
 826                         JSONArray array = json.isArray();
 827                         int i = 0;
 828                         if (array != null) {
 829                             deleteObject(folder, i, array, callback);
 830                         }
 831                     }
 832                 }
 833
 834                 @Override
 835                 public void onError(Request request, Throwable exception) {
 836                         setError(exception);
 837                     displayError("System error unable to delete folder: " + exception.getMessage());
 838                 }
 839             });
 840         }
 841         catch (RequestException e) {
 842         }
 843     }
 844
 845     void deleteObject(final Folder folder, final int i, final JSONArray array, final Command callback) {
 846         if (i < array.size()) {
 847             JSONObject o = array.get(i).isObject();
 848             if (o != null && !o.containsKey("subdir")) {
 849                 JSONString name = o.get("name").isString();
 850                 String path = "/" + folder.getContainer() + "/" + name.stringValue();
 851                 DeleteRequest delete = new DeleteRequest(getApiPath(), folder.getOwner(), URL.encode(path)) {
 852                     @Override
 853                     public void onSuccess(Resource result) {
 854                         deleteObject(folder, i + 1, array, callback);
 855                     }
 856
 857                     @Override
 858                     public void onError(Throwable t) {
 859                         GWT.log("", t);
 860                                                 setError(t);
 861                         displayError("System error unable to delete folder: " + t.getMessage());
 862                     }
 863
 864                                 @Override
 865                                 protected void onUnauthorized(Response response) {
 866                                         sessionExpired();
 867                                 }
 868                 };
 869                 delete.setHeader("X-Auth-Token", getToken());
 870                 Scheduler.get().scheduleDeferred(delete);
 871             }
 872             else if (o != null) {
 873                 String subdir = o.get("subdir").isString().stringValue();
 874                 subdir = subdir.substring(0, subdir.length() - 1);
 875                 String path = getApiPath() + getUsername() + "/" + folder.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(subdir) + "&t=" + System.currentTimeMillis();
 876                 RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, path);
 877                 builder.setHeader("X-Auth-Token", getToken());
 878                 try {
 879                     builder.sendRequest("", new RequestCallback() {
 880                         @Override
 881                         public void onResponseReceived(Request request, Response response) {
 882                             if (response.getStatusCode() == Response.SC_OK) {
 883                                 JSONValue json = JSONParser.parseStrict(response.getText());
 884                                 JSONArray array2 = json.isArray();
 885                                 if (array2 != null) {
 886                                     int l = array.size();
 887                                     for (int j=0; j<array2.size(); j++) {
 888                                         array.set(l++, array2.get(j));
 889                                     }
 890                                 }
 891                                 deleteObject(folder, i + 1, array, callback);
 892                             }
 893                         }
 894
 895                         @Override
 896                         public void onError(Request request, Throwable exception) {
 897                                 setError(exception);
 898                             displayError("System error unable to delete folder: " + exception.getMessage());
 899                         }
 900                     });
 901                 }
 902                 catch (RequestException e) {
 903                 }
 904             }
 905         }
 906         else {
 907             String path = folder.getUri();
 908             DeleteRequest deleteFolder = new DeleteRequest(getApiPath(), getUsername(), URL.encode(path)) {
 909                 @Override
 910                 public void onSuccess(Resource result) {
 911                     updateFolder(folder.getParent(), true, new Command() {
 912
 913                                                 @Override
 914                                                 public void execute() {
 915                                                         folderTreeSelectionModel.setSelected(folder.getParent(), true);
 916                                                         updateStatistics();
 917                                                         if (callback != null)
 918                                                                 callback.execute();
 919                                                 }
 920                                         }, true);
 921                 }
 922
 923                 @Override
 924                 public void onError(Throwable t) {
 925                     GWT.log("", t);
 926                                         setError(t);
 927                     if (t instanceof RestException) {
 928                         if (((RestException) t).getHttpStatusCode() != Response.SC_NOT_FOUND)
 929                                 displayError("Unable to delete folder: "+((RestException) t).getHttpStatusText());
 930                         else
 931                                 onSuccess(null);
 932                     }
 933                     else
 934                         displayError("System error unable to delete folder: " + t.getMessage());
 935                 }
 936
 937                                 @Override
 938                                 protected void onUnauthorized(Response response) {
 939                                         sessionExpired();
 940                                 }
 941             };
 942             deleteFolder.setHeader("X-Auth-Token", getToken());
 943             Scheduler.get().scheduleDeferred(deleteFolder);
 944         }
 945     }
 946
 947     public FolderTreeView getFolderTreeView() {
 948         return folderTreeView;
 949     }
 950
 951     public void copyFiles(final Iterator<File> iter, final String targetUsername, final String targetUri, final Command callback) {
 952         if (iter.hasNext()) {
 953             File file = iter.next();
 954             String path = targetUri + "/" + file.getName();
 955             PutRequest copyFile = new PutRequest(getApiPath(), targetUsername, path) {
 956                 @Override
 957                 public void onSuccess(Resource result) {
 958                     copyFiles(iter, targetUsername, targetUri, callback);
 959                 }
 960
 961                 @Override
 962                 public void onError(Throwable t) {
 963                     GWT.log("", t);
 964                                         setError(t);
 965                     if (t instanceof RestException) {
 966                         displayError("Unable to copy file: " + ((RestException) t).getHttpStatusText());
 967                     }
 968                     else
 969                         displayError("System error unable to copy file: "+t.getMessage());
 970                 }
 971
 972                                 @Override
 973                                 protected void onUnauthorized(Response response) {
 974                                         sessionExpired();
 975                                 }
 976             };
 977             copyFile.setHeader("X-Auth-Token", getToken());
 978             copyFile.setHeader("X-Copy-From", URL.encodePathSegment(file.getUri()));
 979             if (!file.getOwner().equals(targetUsername))
 980                 copyFile.setHeader("X-Source-Account", URL.encodePathSegment(file.getOwner()));
 981             copyFile.setHeader("Content-Type", file.getContentType());
 982             Scheduler.get().scheduleDeferred(copyFile);
 983         }
 984         else  if (callback != null) {
 985             callback.execute();
 986         }
 987     }
 988
 989     public void copySubfolders(final Iterator<Folder> iter, final String targetUsername, final String targetUri, final Command callback) {
 990         if (iter.hasNext()) {
 991             final Folder f = iter.next();
 992             copyFolder(f, targetUsername, targetUri, new Command() {
 993
 994                                 @Override
 995                                 public void execute() {
 996                                         copySubfolders(iter, targetUsername, targetUri, callback);
 997                                 }
 998                         });
 999         }
1000         else  if (callback != null) {
1001             callback.execute();
1002         }
1003     }
1004
1005     public void copyFolder(final Folder f, final String targetUsername, final String targetUri, final Command callback) {
1006         String path = targetUri + "/" + f.getName();
1007         PutRequest createFolder = new PutRequest(getApiPath(), targetUsername, path) {
1008             @Override
1009             public void onSuccess(Resource result) {
1010                 GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, getApiPath(), f.getOwner(), "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix()), f) {
1011
1012                                         @Override
1013                                         public void onSuccess(final Folder _f) {
1014                                 Iterator<File> iter = _f.getFiles().iterator();
1015                                 copyFiles(iter, targetUsername, targetUri + "/" + _f.getName(), new Command() {
1016                                     @Override
1017                                     public void execute() {
1018                                         Iterator<Folder> iterf = _f.getSubfolders().iterator();
1019                                         copySubfolders(iterf, targetUsername, targetUri + "/" + _f.getName(), callback);
1020                                     }
1021                                 });
1022                                         }
1023
1024                                         @Override
1025                                         public void onError(Throwable t) {
1026                                 GWT.log("", t);
1027                                                 setError(t);
1028                                 if (t instanceof RestException) {
1029                                     displayError("Unable to get folder: " + ((RestException) t).getHttpStatusText());
1030                                 }
1031                                 else
1032                                     displayError("System error getting folder: " + t.getMessage());
1033                                         }
1034
1035                                         @Override
1036                                         protected void onUnauthorized(Response response) {
1037                                                 sessionExpired();
1038                                         }
1039                                 };
1040                                 getFolder.setHeader("X-Auth-Token", getToken());
1041                                 Scheduler.get().scheduleDeferred(getFolder);
1042             }
1043
1044             @Override
1045             public void onError(Throwable t) {
1046                 GWT.log("", t);
1047                                 setError(t);
1048                if (t instanceof RestException) {
1049                     displayError("Unable to create folder: " + ((RestException) t).getHttpStatusText());
1050                 }
1051                 else
1052                     displayError("System error creating folder: " + t.getMessage());
1053             }
1054
1055                         @Override
1056                         protected void onUnauthorized(Response response) {
1057                                 sessionExpired();
1058                         }
1059         };
1060         createFolder.setHeader("X-Auth-Token", getToken());
1061         createFolder.setHeader("Accept", "*/*");
1062         createFolder.setHeader("Content-Length", "0");
1063         createFolder.setHeader("Content-Type", "application/folder");
1064         Scheduler.get().scheduleDeferred(createFolder);
1065     }
1066
1067     public void addSelectionModel(@SuppressWarnings("rawtypes") SingleSelectionModel model) {
1068         selectionModels.add(model);
1069     }
1070
1071         public OtherSharedTreeView getOtherSharedTreeView() {
1072                 return otherSharedTreeView;
1073         }
1074
1075         public void updateTrash(boolean showFiles, Command callback) {
1076                 updateFolder(trash, showFiles, callback, true);
1077         }
1078
1079         public void updateGroupsNode() {
1080                 groupTreeView.updateGroupNode(null);
1081         }
1082
1083         public void addGroup(String groupname) {
1084                 Group newGroup = new Group(groupname);
1085                 account.addGroup(newGroup);
1086                 groupTreeView.updateGroupNode(null);
1087         }
1088
1089         public void removeGroup(Group group) {
1090                 account.removeGroup(group);
1091                 updateGroupsNode();
1092         }
1093
1094         public TreeView getSelectedTree() {
1095                 return selectedTree;
1096         }
1097
1098         public void setSelectedTree(TreeView selected) {
1099                 selectedTree = selected;
1100         }
1101
1102         public Folder getSelection() {
1103                 return selectedTree.getSelection();
1104         }
1105
1106         public void showFolderStatistics(int folderFileCount) {
1107                 numOfFiles.setHTML(String.valueOf(folderFileCount));
1108         }
1109
1110         public GroupTreeView getGroupTreeView() {
1111                 return groupTreeView;
1112         }
1113
1114         public void sessionExpired() {
1115                 new SessionExpiredDialog(this).center();
1116         }
1117
1118         public void updateRootFolder(Command callback) {
1119                 updateFolder(account.getPithos(), false, callback, true);
1120         }
1121
1122         void createMySharedTree() {
1123                 mysharedTreeSelectionModel = new SingleSelectionModel<Folder>();
1124                 mysharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
1125                     @Override
1126                     public void onSelectionChange(SelectionChangeEvent event) {
1127                         if (mysharedTreeSelectionModel.getSelectedObject() != null) {
1128                             deselectOthers(mysharedTreeView, mysharedTreeSelectionModel);
1129                             upload.setEnabled(false);
1130                             updateSharedFolder(mysharedTreeSelectionModel.getSelectedObject(), true);
1131                                         showRelevantToolbarButtons();
1132                         }
1133                                 else {
1134                                         if (getSelectedTree().equals(mysharedTreeView))
1135                                                 setSelectedTree(null);
1136                                         if (getSelectedTree() == null)
1137                                                 showRelevantToolbarButtons();
1138                                 }
1139                     }
1140                 });
1141                 selectionModels.add(mysharedTreeSelectionModel);
1142                 mysharedTreeViewModel = new MysharedTreeViewModel(Pithos.this, mysharedTreeSelectionModel);
1143                 mysharedTreeViewModel.initialize(new Command() {
1144
1145                         @Override
1146                         public void execute() {
1147                             mysharedTreeView = new MysharedTreeView(mysharedTreeViewModel);
1148                                 trees.insert(mysharedTreeView, 2);
1149                                 treeViews.add(mysharedTreeView);
1150                                 createOtherSharedTree();
1151                         }
1152                 });
1153         }
1154
1155         void createOtherSharedTree() {
1156                 otherSharedTreeSelectionModel = new SingleSelectionModel<Folder>();
1157                 otherSharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
1158                     @Override
1159                     public void onSelectionChange(SelectionChangeEvent event) {
1160                         if (otherSharedTreeSelectionModel.getSelectedObject() != null) {
1161                             deselectOthers(otherSharedTreeView, otherSharedTreeSelectionModel);
1162                             otherSharedTreeView.addStyleName("cellTreeWidget-selectedTree");
1163                             applyPermissions(otherSharedTreeSelectionModel.getSelectedObject());
1164                             updateOtherSharedFolder(otherSharedTreeSelectionModel.getSelectedObject(), true);
1165                                         showRelevantToolbarButtons();
1166                         }
1167                                 else {
1168                                         if (getSelectedTree().equals(otherSharedTreeView))
1169                                                 setSelectedTree(null);
1170                                         if (getSelectedTree() == null)
1171                                                 showRelevantToolbarButtons();
1172                                 }
1173                     }
1174                 });
1175                 selectionModels.add(otherSharedTreeSelectionModel);
1176                 otherSharedTreeViewModel = new OtherSharedTreeViewModel(Pithos.this, otherSharedTreeSelectionModel);
1177                 otherSharedTreeViewModel.initialize(new Command() {
1178
1179                         @Override
1180                         public void execute() {
1181                             otherSharedTreeView = new OtherSharedTreeView(otherSharedTreeViewModel);
1182                                 trees.insert(otherSharedTreeView, 3);
1183                                 treeViews.add(otherSharedTreeView);
1184                         }
1185                 });
1186         }
1187
1188         public native void log1(String message)/*-{
1189                 $wnd.console.log(message);
1190         }-*/;
1191
1192         public String getErrorData() {
1193                 if (error != null)
1194                         return error.toString();
1195                 return "";
1196         }
1197
1198         public void setError(Throwable t) {
1199                 error = t;
1200         }
1201
1202         public void showRelevantToolbarButtons() {
1203                 toolbar.showRelevantButtons();
1204         }
1205
1206         public FileUploadDialog getFileUploadDialog() {
1207                 if (fileUploadDialog == null)
1208                         fileUploadDialog = new FileUploadDialog(this);
1209                 return fileUploadDialog;
1210         }
1211
1212         public void hideUploadIndicator() {
1213                 upload.removeStyleName("pithos-uploadButton-loading");
1214                 upload.setTitle("");
1215         }
1216
1217         public void showUploadIndicator() {
1218                 upload.addStyleName("pithos-uploadButton-loading");
1219                 upload.setTitle("Upload in progress. Click for details.");
1220         }
1221
1222         public void scheduleFolderHeadCommand(final Folder folder, final Command callback) {
1223                 if (folder == null) {
1224                         if (callback != null)
1225                                 callback.execute();
1226                 }
1227                 else {
1228                         HeadRequest<Folder> headFolder = new HeadRequest<Folder>(Folder.class, getApiPath(), folder.getOwner(), folder.getUri(), folder) {
1229
1230                                 @Override
1231                                 public void onSuccess(Folder _result) {
1232                                         if (callback != null)
1233                                                 callback.execute();
1234                                 }
1235
1236                                 @Override
1237                                 public void onError(Throwable t) {
1238                                 if (t instanceof RestException) {
1239                                         if (((RestException) t).getHttpStatusCode() == Response.SC_NOT_FOUND) {
1240                                 final String path = folder.getUri();
1241                                 PutRequest newFolder = new PutRequest(getApiPath(), folder.getOwner(), path) {
1242                                     @Override
1243                                     public void onSuccess(Resource _result) {
1244                                         scheduleFolderHeadCommand(folder, callback);
1245                                     }
1246
1247                                     @Override
1248                                     public void onError(Throwable _t) {
1249                                         GWT.log("", _t);
1250                                                                 setError(_t);
1251                                         if(_t instanceof RestException){
1252                                             displayError("Unable to create folder: " + ((RestException) _t).getHttpStatusText());
1253                                         }
1254                                         else
1255                                             displayError("System error creating folder: " + _t.getMessage());
1256                                     }
1257
1258                                                 @Override
1259                                                 protected void onUnauthorized(Response response) {
1260                                                         sessionExpired();
1261                                                 }
1262                                 };
1263                                 newFolder.setHeader("X-Auth-Token", getToken());
1264                                 newFolder.setHeader("Content-Type", "application/folder");
1265                                 newFolder.setHeader("Accept", "*/*");
1266                                 newFolder.setHeader("Content-Length", "0");
1267                                 Scheduler.get().scheduleDeferred(newFolder);
1268                                         }
1269                                         else
1270                                                 displayError("Error heading folder: " + ((RestException) t).getHttpStatusText());
1271                                 }
1272                                 else
1273                                     displayError("System error heading folder: " + t.getMessage());
1274
1275                                 GWT.log("Error heading folder", t);
1276                                         setError(t);
1277                                 }
1278
1279                                 @Override
1280                                 protected void onUnauthorized(Response response) {
1281                                         sessionExpired();
1282                                 }
1283                         };
1284                         headFolder.setHeader("X-Auth-Token", getToken());
1285                         Scheduler.get().scheduleDeferred(headFolder);
1286                 }
1287         }
1288
1289         public void scheduleFileHeadCommand(File f, final Command callback) {
1290                 HeadRequest<File> headFile = new HeadRequest<File>(File.class, getApiPath(), f.getOwner(), f.getUri(), f) {
1291
1292                         @Override
1293                         public void onSuccess(File _result) {
1294                                 if (callback != null)
1295                                         callback.execute();
1296                         }
1297
1298                         @Override
1299                         public void onError(Throwable t) {
1300                         GWT.log("Error heading file", t);
1301                                 setError(t);
1302                         if (t instanceof RestException)
1303                             displayError("Error heading file: " + ((RestException) t).getHttpStatusText());
1304                         else
1305                             displayError("System error heading file: " + t.getMessage());
1306                         }
1307
1308                         @Override
1309                         protected void onUnauthorized(Response response) {
1310                                 sessionExpired();
1311                         }
1312                 };
1313                 headFile.setHeader("X-Auth-Token", getToken());
1314                 Scheduler.get().scheduleDeferred(headFile);
1315         }
1316 }