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         trees.setSpacing(5);
 375
 376 //        HorizontalPanel treeHeader = new HorizontalPanel();
 377 //        treeHeader.addStyleName("pithos-treeHeader");
 378 //        treeHeader.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_CENTER);
 379 //        treeHeader.setVerticalAlignment(HasVerticalAlignment.ALIGN_MIDDLE);
 380 //        treeHeader.add(statistics);
 381 //        treeHeader.setCellHorizontalAlignment(statistics, HasHorizontalAlignment.ALIGN_LEFT);
 382 //        trees.add(treeHeader);
 383
 384         trees.add(folderTreeView);
 385
 386         HorizontalPanel separator = new HorizontalPanel();
 387         separator.addStyleName("pithos-statisticsSeparator");
 388         trees.add(separator);
 389
 390         HorizontalPanel statistics = new HorizontalPanel();
 391             statistics.addStyleName("pithos-statistics");
 392             statistics.add(new HTML("Used:&nbsp;"));
 393             usedBytes = new HTML();
 394             statistics.add(usedBytes);
 395             statistics.add(new HTML("&nbsp;of&nbsp;"));
 396             totalBytes = new HTML();
 397             statistics.add(totalBytes);
 398             statistics.add(new HTML("&nbsp;("));
 399             usedPercent = new HTML();
 400             statistics.add(usedPercent);
 401             statistics.add(new HTML(")"));
 402         trees.add(statistics);
 403
 404         trees.add(groupTreeView);
 405         // Add the left and right panels to the split panel.
 406         splitPanel.setLeftWidget(trees);
 407         splitPanel.setRightWidget(inner);
 408         splitPanel.setSplitPosition("219px");
 409         splitPanel.setSize("100%", "100%");
 410         splitPanel.addStyleName("pithos-splitPanel");
 411         splitPanel.setWidth(contentWidth);
 412         outer.add(splitPanel);
 413         outer.setCellHorizontalAlignment(splitPanel, HasHorizontalAlignment.ALIGN_CENTER);
 414
 415         if (!bareContent) {
 416                 statusPanel = new StatusPanel();
 417                 statusPanel.setWidth("100%");
 418                 outer.add(statusPanel);
 419                 outer.setCellHorizontalAlignment(statusPanel, HasHorizontalAlignment.ALIGN_CENTER);
 420         }
 421         else
 422                 splitPanel.addStyleName("pithos-splitPanel-noframe");
 423
 424         // Hook the window resize event, so that we can adjust the UI.
 425         Window.addResizeHandler(this);
 426         // Clear out the window's built-in margin, because we want to take
 427         // advantage of the entire client area.
 428         Window.setMargin("0px");
 429         // Finally, add the outer panel to the RootPanel, so that it will be
 430         // displayed.
 431         RootPanel.get().add(outer);
 432         // Call the window resized handler to get the initial sizes setup. Doing
 433         // this in a deferred command causes it to occur after all widgets'
 434         // sizes have been computed by the browser.
 435         Scheduler.get().scheduleDeferred(new ScheduledCommand() {
 436
 437             @Override
 438             public void execute() {
 439                 onWindowResized(Window.getClientHeight());
 440             }
 441         });
 442
 443         Scheduler.get().scheduleDeferred(new ScheduledCommand() {
 444             @Override
 445             public void execute() {
 446                 fetchAccount(new Command() {
 447
 448                                         @Override
 449                                         public void execute() {
 450                                 if (!account.hasHomeContainer())
 451                                     createHomeContainer(account, this);
 452                                 else if (!account.hasTrashContainer())
 453                                         createTrashContainer(this);
 454                                 else {
 455                                         for (Folder f : account.getContainers())
 456                                                 if (f.getName().equals(Pithos.TRASH_CONTAINER)) {
 457                                                         trash = f;
 458                                                         break;
 459                                                 }
 460                                     folderTreeViewModel.initialize(account, new Command() {
 461
 462                                                                 @Override
 463                                                                 public void execute() {
 464                                                     createMySharedTree();
 465                                                                 }
 466                                                         });
 467                                     groupTreeViewModel.initialize();
 468                                     showStatistics();
 469                                 }
 470                                         }
 471                                 });
 472             }
 473         });
 474
 475         Scheduler.get().scheduleFixedDelay(new RepeatingCommand() {
 476
 477                         @Override
 478                         public boolean execute() {
 479                                 Folder f = getSelection();
 480                                 if (f != null) {
 481                                         if (getSelectedTree().equals(folderTreeView))
 482                                                 updateFolder(f, true, null, false);
 483                                         else if (getSelectedTree().equals(mysharedTreeView))
 484                                                 updateSharedFolder(f, true);
 485                                 }
 486                                 return true;
 487                         }
 488                 }, 3000);
 489     }
 490
 491     public void applyPermissions(Folder f) {
 492         if (f != null) {
 493                 if (f.isInTrash())
 494                         upload.setEnabled(false);
 495                 else {
 496                         Boolean[] perms = f.getPermissions().get(username);
 497                         if (f.getOwner().equals(username) || (perms != null && perms[1] != null && perms[1])) {
 498                                 upload.setEnabled(true);
 499                         }
 500                         else
 501                                 upload.setEnabled(false);
 502                 }
 503         }
 504         else
 505                 upload.setEnabled(false);
 506         }
 507
 508         @SuppressWarnings({ "rawtypes", "unchecked" })
 509         public void deselectOthers(TreeView _selectedTree, SingleSelectionModel model) {
 510         selectedTree = _selectedTree;
 511
 512         for (Composite c : treeViews)
 513                 if (c.equals(selectedTree))
 514                         c.addStyleName("cellTreeWidget-selectedTree");
 515                 else
 516                         c.removeStyleName("cellTreeWidget-selectedTree");
 517
 518         for (SingleSelectionModel s : selectionModels)
 519             if (!s.equals(model) && s.getSelectedObject() != null)
 520                 s.setSelected(s.getSelectedObject(), false);
 521     }
 522
 523     public void showFiles(final Folder f) {
 524         Set<File> files = f.getFiles();
 525         showFiles(files);
 526     }
 527
 528     public void showFiles(Set<File> files) {
 529         fileList.setFiles(new ArrayList<File>(files));
 530     }
 531
 532     /**
 533          * Parse and store the user credentials to the appropriate fields.
 534          */
 535         private boolean parseUserCredentials() {
 536         username = Window.Location.getParameter("user");
 537         token = Window.Location.getParameter("token");
 538         Configuration conf = (Configuration) GWT.create(Configuration.class);
 539                 Dictionary otherProperties = Dictionary.getDictionary("otherProperties");
 540         if (username == null || username.length() == 0 || token == null || token.length() == 0) {
 541             String cookie = otherProperties.get("authCookie");
 542             String auth = Cookies.getCookie(cookie);
 543             if (auth == null) {
 544                 authenticateUser();
 545                 return false;
 546             }
 547             if (auth.startsWith("\""))
 548                 auth = auth.substring(1);
 549             if (auth.endsWith("\""))
 550                 auth = auth.substring(0, auth.length() - 1);
 551                         String[] authSplit = auth.split("\\" + conf.cookieSeparator(), 2);
 552                         if (authSplit.length != 2) {
 553                             authenticateUser();
 554                             return false;
 555                         }
 556                         username = authSplit[0];
 557                         token = authSplit[1];
 558         }
 559         else
 560                 Cookies.setCookie(otherProperties.get("authCookie"), username + conf.cookieSeparator() + token, null, "", "/", false);
 561
 562         String gotoUrl = Window.Location.getParameter("goto");
 563                 if (gotoUrl != null && gotoUrl.length() > 0) {
 564                         Window.Location.assign(gotoUrl);
 565                         return false;
 566                 }
 567                 return true;
 568     }
 569
 570     /**
 571          * Redirect the user to the login page for authentication.
 572          */
 573         protected void authenticateUser() {
 574                 Dictionary otherProperties = Dictionary.getDictionary("otherProperties");
 575         Window.Location.assign(otherProperties.get("loginUrl") + Window.Location.getHref());
 576         }
 577
 578         protected void fetchAccount(final Command callback) {
 579         String path = "?format=json";
 580
 581         GetRequest<AccountResource> getAccount = new GetRequest<AccountResource>(AccountResource.class, getApiPath(), username, path) {
 582             @Override
 583             public void onSuccess(AccountResource _result) {
 584                 account = _result;
 585                 if (callback != null)
 586                         callback.execute();
 587             }
 588
 589             @Override
 590             public void onError(Throwable t) {
 591                 GWT.log("Error getting account", t);
 592                                 setError(t);
 593                 if (t instanceof RestException)
 594                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 595                 else
 596                     displayError("System error fetching user data: " + t.getMessage());
 597             }
 598
 599                         @Override
 600                         protected void onUnauthorized(Response response) {
 601                                 sessionExpired();
 602                         }
 603         };
 604         getAccount.setHeader("X-Auth-Token", token);
 605         Scheduler.get().scheduleDeferred(getAccount);
 606     }
 607
 608     public void updateStatistics() {
 609         HeadRequest<AccountResource> headAccount = new HeadRequest<AccountResource>(AccountResource.class, getApiPath(), username, "", account) {
 610
 611                         @Override
 612                         public void onSuccess(AccountResource _result) {
 613                                 showStatistics();
 614                         }
 615
 616                         @Override
 617                         public void onError(Throwable t) {
 618                 GWT.log("Error getting account", t);
 619                                 setError(t);
 620                 if (t instanceof RestException)
 621                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 622                 else
 623                     displayError("System error fetching user data: " + t.getMessage());
 624                         }
 625
 626                         @Override
 627                         protected void onUnauthorized(Response response) {
 628                                 sessionExpired();
 629                         }
 630                 };
 631                 headAccount.setHeader("X-Auth-Token", token);
 632                 Scheduler.get().scheduleDeferred(headAccount);
 633         }
 634
 635         protected void showStatistics() {
 636         usedBytes.setHTML(String.valueOf(account.getFileSizeAsString()));
 637         totalBytes.setHTML(String.valueOf(account.getQuotaAsString()));
 638         NumberFormat nf = NumberFormat.getPercentFormat();
 639         usedPercent.setHTML(nf.format(account.getUsedPercentage()));
 640         }
 641
 642         protected void createHomeContainer(final AccountResource _account, final Command callback) {
 643         String path = "/" + Pithos.HOME_CONTAINER;
 644         PutRequest createPithos = new PutRequest(getApiPath(), getUsername(), path) {
 645             @Override
 646             public void onSuccess(Resource result) {
 647                 if (!_account.hasTrashContainer())
 648                         createTrashContainer(callback);
 649                 else
 650                         fetchAccount(callback);
 651             }
 652
 653             @Override
 654             public void onError(Throwable t) {
 655                 GWT.log("Error creating pithos", t);
 656                                 setError(t);
 657                 if (t instanceof RestException)
 658                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 659                 else
 660                     displayError("System error Error creating pithos: " + t.getMessage());
 661             }
 662
 663                         @Override
 664                         protected void onUnauthorized(Response response) {
 665                                 sessionExpired();
 666                         }
 667         };
 668         createPithos.setHeader("X-Auth-Token", getToken());
 669         Scheduler.get().scheduleDeferred(createPithos);
 670     }
 671
 672     protected void createTrashContainer(final Command callback) {
 673         String path = "/" + Pithos.TRASH_CONTAINER;
 674         PutRequest createPithos = new PutRequest(getApiPath(), getUsername(), path) {
 675             @Override
 676             public void onSuccess(Resource result) {
 677                         fetchAccount(callback);
 678             }
 679
 680             @Override
 681             public void onError(Throwable t) {
 682                 GWT.log("Error creating pithos", t);
 683                                 setError(t);
 684                 if (t instanceof RestException)
 685                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 686                 else
 687                     displayError("System error Error creating pithos: " + t.getMessage());
 688             }
 689
 690                         @Override
 691                         protected void onUnauthorized(Response response) {
 692                                 sessionExpired();
 693                         }
 694         };
 695         createPithos.setHeader("X-Auth-Token", getToken());
 696         Scheduler.get().scheduleDeferred(createPithos);
 697     }
 698
 699     /**
 700          * Creates an HTML fragment that places an image & caption together, for use
 701          * in a group header.
 702          *
 703          * @param imageProto an image prototype for an image
 704          * @param caption the group caption
 705          * @return the header HTML fragment
 706          */
 707         private String createHeaderHTML(AbstractImagePrototype imageProto, String caption) {
 708                 String captionHTML = "<table class='caption' cellpadding='0' "
 709                 + "cellspacing='0'>" + "<tr><td class='lcaption'>" + imageProto.getHTML()
 710                 + "</td><td id =" + caption +" class='rcaption'><b style='white-space:nowrap'>&nbsp;"
 711                 + caption + "</b></td></tr></table>";
 712                 return captionHTML;
 713         }
 714
 715         protected void onWindowResized(int height) {
 716                 // Adjust the split panel to take up the available room in the window.
 717                 int newHeight = height - splitPanel.getAbsoluteTop();
 718                 if (newHeight < 1)
 719                         newHeight = 1;
 720                 splitPanel.setHeight("" + newHeight);
 721                 inner.setHeight("" + newHeight);
 722         }
 723
 724         @Override
 725         public void onResize(ResizeEvent event) {
 726                 int height = event.getHeight();
 727                 onWindowResized(height);
 728         }
 729
 730         /**
 731          * Display an error message.
 732          *
 733          * @param msg the message to display
 734          */
 735         public void displayError(String msg) {
 736                 messagePanel.displayError(msg);
 737         }
 738
 739         /**
 740          * Display a warning message.
 741          *
 742          * @param msg the message to display
 743          */
 744         public void displayWarning(String msg) {
 745                 messagePanel.displayWarning(msg);
 746         }
 747
 748         /**
 749          * Display an informational message.
 750          *
 751          * @param msg the message to display
 752          */
 753         public void displayInformation(String msg) {
 754                 messagePanel.displayInformation(msg);
 755         }
 756
 757         /**
 758          * Retrieve the fileList.
 759          *
 760          * @return the fileList
 761          */
 762         public FileList getFileList() {
 763                 return fileList;
 764         }
 765
 766         /**
 767          * Retrieve the topPanel.
 768          *
 769          * @return the topPanel
 770          */
 771         TopPanel getTopPanel() {
 772                 return topPanel;
 773         }
 774
 775         /**
 776          * Retrieve the clipboard.
 777          *
 778          * @return the clipboard
 779          */
 780         public Clipboard getClipboard() {
 781                 return clipboard;
 782         }
 783
 784         public StatusPanel getStatusPanel() {
 785                 return statusPanel;
 786         }
 787
 788         public String getToken() {
 789                 return token;
 790         }
 791
 792         public static native void preventIESelection() /*-{
 793                 $doc.body.onselectstart = function () { return false; };
 794         }-*/;
 795
 796         public static native void enableIESelection() /*-{
 797                 if ($doc.body.onselectstart != null)
 798                 $doc.body.onselectstart = null;
 799         }-*/;
 800
 801         /**
 802          * @return the absolute path of the API root URL
 803          */
 804         public String getApiPath() {
 805                 Configuration conf = (Configuration) GWT.create(Configuration.class);
 806                 return conf.apiPath();
 807         }
 808
 809         /**
 810          * History support for folder navigation
 811          * adds a new browser history entry
 812          *
 813          * @param key
 814          */
 815         public void updateHistory(String key){
 816 //              Replace any whitespace of the initial string to "+"
 817 //              String result = key.replaceAll("\\s","+");
 818 //              Add a new browser history entry.
 819 //              History.newItem(result);
 820                 History.newItem(key);
 821         }
 822
 823     public void deleteFolder(final Folder folder, final Command callback) {
 824         String path = getApiPath() + folder.getOwner() + "/" + folder.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(folder.getPrefix()) + "&t=" + System.currentTimeMillis();
 825         RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, path);
 826         builder.setHeader("X-Auth-Token", getToken());
 827         try {
 828             builder.sendRequest("", new RequestCallback() {
 829                 @Override
 830                 public void onResponseReceived(Request request, Response response) {
 831                     if (response.getStatusCode() == Response.SC_OK) {
 832                         JSONValue json = JSONParser.parseStrict(response.getText());
 833                         JSONArray array = json.isArray();
 834                         int i = 0;
 835                         if (array != null) {
 836                             deleteObject(folder, i, array, callback);
 837                         }
 838                     }
 839                 }
 840
 841                 @Override
 842                 public void onError(Request request, Throwable exception) {
 843                         setError(exception);
 844                     displayError("System error unable to delete folder: " + exception.getMessage());
 845                 }
 846             });
 847         }
 848         catch (RequestException e) {
 849         }
 850     }
 851
 852     void deleteObject(final Folder folder, final int i, final JSONArray array, final Command callback) {
 853         if (i < array.size()) {
 854             JSONObject o = array.get(i).isObject();
 855             if (o != null && !o.containsKey("subdir")) {
 856                 JSONString name = o.get("name").isString();
 857                 String path = "/" + folder.getContainer() + "/" + name.stringValue();
 858                 DeleteRequest delete = new DeleteRequest(getApiPath(), folder.getOwner(), URL.encode(path)) {
 859                     @Override
 860                     public void onSuccess(Resource result) {
 861                         deleteObject(folder, i + 1, array, callback);
 862                     }
 863
 864                     @Override
 865                     public void onError(Throwable t) {
 866                         GWT.log("", t);
 867                                                 setError(t);
 868                         displayError("System error unable to delete folder: " + t.getMessage());
 869                     }
 870
 871                                 @Override
 872                                 protected void onUnauthorized(Response response) {
 873                                         sessionExpired();
 874                                 }
 875                 };
 876                 delete.setHeader("X-Auth-Token", getToken());
 877                 Scheduler.get().scheduleDeferred(delete);
 878             }
 879             else if (o != null) {
 880                 String subdir = o.get("subdir").isString().stringValue();
 881                 subdir = subdir.substring(0, subdir.length() - 1);
 882                 String path = getApiPath() + getUsername() + "/" + folder.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(subdir) + "&t=" + System.currentTimeMillis();
 883                 RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, path);
 884                 builder.setHeader("X-Auth-Token", getToken());
 885                 try {
 886                     builder.sendRequest("", new RequestCallback() {
 887                         @Override
 888                         public void onResponseReceived(Request request, Response response) {
 889                             if (response.getStatusCode() == Response.SC_OK) {
 890                                 JSONValue json = JSONParser.parseStrict(response.getText());
 891                                 JSONArray array2 = json.isArray();
 892                                 if (array2 != null) {
 893                                     int l = array.size();
 894                                     for (int j=0; j<array2.size(); j++) {
 895                                         array.set(l++, array2.get(j));
 896                                     }
 897                                 }
 898                                 deleteObject(folder, i + 1, array, callback);
 899                             }
 900                         }
 901
 902                         @Override
 903                         public void onError(Request request, Throwable exception) {
 904                                 setError(exception);
 905                             displayError("System error unable to delete folder: " + exception.getMessage());
 906                         }
 907                     });
 908                 }
 909                 catch (RequestException e) {
 910                 }
 911             }
 912         }
 913         else {
 914             String path = folder.getUri();
 915             DeleteRequest deleteFolder = new DeleteRequest(getApiPath(), getUsername(), URL.encode(path)) {
 916                 @Override
 917                 public void onSuccess(Resource result) {
 918                     updateFolder(folder.getParent(), true, new Command() {
 919
 920                                                 @Override
 921                                                 public void execute() {
 922                                                         folderTreeSelectionModel.setSelected(folder.getParent(), true);
 923                                                         updateStatistics();
 924                                                         if (callback != null)
 925                                                                 callback.execute();
 926                                                 }
 927                                         }, true);
 928                 }
 929
 930                 @Override
 931                 public void onError(Throwable t) {
 932                     GWT.log("", t);
 933                                         setError(t);
 934                     if (t instanceof RestException) {
 935                         if (((RestException) t).getHttpStatusCode() != Response.SC_NOT_FOUND)
 936                                 displayError("Unable to delete folder: "+((RestException) t).getHttpStatusText());
 937                         else
 938                                 onSuccess(null);
 939                     }
 940                     else
 941                         displayError("System error unable to delete folder: " + t.getMessage());
 942                 }
 943
 944                                 @Override
 945                                 protected void onUnauthorized(Response response) {
 946                                         sessionExpired();
 947                                 }
 948             };
 949             deleteFolder.setHeader("X-Auth-Token", getToken());
 950             Scheduler.get().scheduleDeferred(deleteFolder);
 951         }
 952     }
 953
 954     public FolderTreeView getFolderTreeView() {
 955         return folderTreeView;
 956     }
 957
 958     public void copyFiles(final Iterator<File> iter, final String targetUsername, final String targetUri, final Command callback) {
 959         if (iter.hasNext()) {
 960             File file = iter.next();
 961             String path = targetUri + "/" + file.getName();
 962             PutRequest copyFile = new PutRequest(getApiPath(), targetUsername, path) {
 963                 @Override
 964                 public void onSuccess(Resource result) {
 965                     copyFiles(iter, targetUsername, targetUri, callback);
 966                 }
 967
 968                 @Override
 969                 public void onError(Throwable t) {
 970                     GWT.log("", t);
 971                                         setError(t);
 972                     if (t instanceof RestException) {
 973                         displayError("Unable to copy file: " + ((RestException) t).getHttpStatusText());
 974                     }
 975                     else
 976                         displayError("System error unable to copy file: "+t.getMessage());
 977                 }
 978
 979                                 @Override
 980                                 protected void onUnauthorized(Response response) {
 981                                         sessionExpired();
 982                                 }
 983             };
 984             copyFile.setHeader("X-Auth-Token", getToken());
 985             copyFile.setHeader("X-Copy-From", URL.encodePathSegment(file.getUri()));
 986             if (!file.getOwner().equals(targetUsername))
 987                 copyFile.setHeader("X-Source-Account", URL.encodePathSegment(file.getOwner()));
 988             copyFile.setHeader("Content-Type", file.getContentType());
 989             Scheduler.get().scheduleDeferred(copyFile);
 990         }
 991         else  if (callback != null) {
 992             callback.execute();
 993         }
 994     }
 995
 996     public void copySubfolders(final Iterator<Folder> iter, final String targetUsername, final String targetUri, final Command callback) {
 997         if (iter.hasNext()) {
 998             final Folder f = iter.next();
 999             copyFolder(f, targetUsername, targetUri, new Command() {
1000
1001                                 @Override
1002                                 public void execute() {
1003                                         copySubfolders(iter, targetUsername, targetUri, callback);
1004                                 }
1005                         });
1006         }
1007         else  if (callback != null) {
1008             callback.execute();
1009         }
1010     }
1011
1012     public void copyFolder(final Folder f, final String targetUsername, final String targetUri, final Command callback) {
1013         String path = targetUri + "/" + f.getName();
1014         PutRequest createFolder = new PutRequest(getApiPath(), targetUsername, path) {
1015             @Override
1016             public void onSuccess(Resource result) {
1017                 GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, getApiPath(), f.getOwner(), "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix()), f) {
1018
1019                                         @Override
1020                                         public void onSuccess(final Folder _f) {
1021                                 Iterator<File> iter = _f.getFiles().iterator();
1022                                 copyFiles(iter, targetUsername, targetUri + "/" + _f.getName(), new Command() {
1023                                     @Override
1024                                     public void execute() {
1025                                         Iterator<Folder> iterf = _f.getSubfolders().iterator();
1026                                         copySubfolders(iterf, targetUsername, targetUri + "/" + _f.getName(), callback);
1027                                     }
1028                                 });
1029                                         }
1030
1031                                         @Override
1032                                         public void onError(Throwable t) {
1033                                 GWT.log("", t);
1034                                                 setError(t);
1035                                 if (t instanceof RestException) {
1036                                     displayError("Unable to get folder: " + ((RestException) t).getHttpStatusText());
1037                                 }
1038                                 else
1039                                     displayError("System error getting folder: " + t.getMessage());
1040                                         }
1041
1042                                         @Override
1043                                         protected void onUnauthorized(Response response) {
1044                                                 sessionExpired();
1045                                         }
1046                                 };
1047                                 getFolder.setHeader("X-Auth-Token", getToken());
1048                                 Scheduler.get().scheduleDeferred(getFolder);
1049             }
1050
1051             @Override
1052             public void onError(Throwable t) {
1053                 GWT.log("", t);
1054                                 setError(t);
1055                if (t instanceof RestException) {
1056                     displayError("Unable to create folder: " + ((RestException) t).getHttpStatusText());
1057                 }
1058                 else
1059                     displayError("System error creating folder: " + t.getMessage());
1060             }
1061
1062                         @Override
1063                         protected void onUnauthorized(Response response) {
1064                                 sessionExpired();
1065                         }
1066         };
1067         createFolder.setHeader("X-Auth-Token", getToken());
1068         createFolder.setHeader("Accept", "*/*");
1069         createFolder.setHeader("Content-Length", "0");
1070         createFolder.setHeader("Content-Type", "application/folder");
1071         Scheduler.get().scheduleDeferred(createFolder);
1072     }
1073
1074     public void addSelectionModel(@SuppressWarnings("rawtypes") SingleSelectionModel model) {
1075         selectionModels.add(model);
1076     }
1077
1078         public OtherSharedTreeView getOtherSharedTreeView() {
1079                 return otherSharedTreeView;
1080         }
1081
1082         public void updateTrash(boolean showFiles, Command callback) {
1083                 updateFolder(trash, showFiles, callback, true);
1084         }
1085
1086         public void updateGroupsNode() {
1087                 groupTreeView.updateGroupNode(null);
1088         }
1089
1090         public void addGroup(String groupname) {
1091                 Group newGroup = new Group(groupname);
1092                 account.addGroup(newGroup);
1093                 groupTreeView.updateGroupNode(null);
1094         }
1095
1096         public void removeGroup(Group group) {
1097                 account.removeGroup(group);
1098                 updateGroupsNode();
1099         }
1100
1101         public TreeView getSelectedTree() {
1102                 return selectedTree;
1103         }
1104
1105         public void setSelectedTree(TreeView selected) {
1106                 selectedTree = selected;
1107         }
1108
1109         public Folder getSelection() {
1110                 return selectedTree.getSelection();
1111         }
1112
1113         public void showFolderStatistics(int folderFileCount) {
1114                 numOfFiles.setHTML(String.valueOf(folderFileCount));
1115         }
1116
1117         public GroupTreeView getGroupTreeView() {
1118                 return groupTreeView;
1119         }
1120
1121         public void sessionExpired() {
1122                 new SessionExpiredDialog(this).center();
1123         }
1124
1125         public void updateRootFolder(Command callback) {
1126                 updateFolder(account.getPithos(), false, callback, true);
1127         }
1128
1129         void createMySharedTree() {
1130                 mysharedTreeSelectionModel = new SingleSelectionModel<Folder>();
1131                 mysharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
1132                     @Override
1133                     public void onSelectionChange(SelectionChangeEvent event) {
1134                         if (mysharedTreeSelectionModel.getSelectedObject() != null) {
1135                             deselectOthers(mysharedTreeView, mysharedTreeSelectionModel);
1136                             upload.setEnabled(false);
1137                             updateSharedFolder(mysharedTreeSelectionModel.getSelectedObject(), true);
1138                                         showRelevantToolbarButtons();
1139                         }
1140                                 else {
1141                                         if (getSelectedTree().equals(mysharedTreeView))
1142                                                 setSelectedTree(null);
1143                                         if (getSelectedTree() == null)
1144                                                 showRelevantToolbarButtons();
1145                                 }
1146                     }
1147                 });
1148                 selectionModels.add(mysharedTreeSelectionModel);
1149                 mysharedTreeViewModel = new MysharedTreeViewModel(Pithos.this, mysharedTreeSelectionModel);
1150                 mysharedTreeViewModel.initialize(new Command() {
1151
1152                         @Override
1153                         public void execute() {
1154                             mysharedTreeView = new MysharedTreeView(mysharedTreeViewModel);
1155                                 trees.insert(mysharedTreeView, 4);
1156                                 treeViews.add(mysharedTreeView);
1157                                 createOtherSharedTree();
1158                         }
1159                 });
1160         }
1161
1162         void createOtherSharedTree() {
1163                 otherSharedTreeSelectionModel = new SingleSelectionModel<Folder>();
1164                 otherSharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
1165                     @Override
1166                     public void onSelectionChange(SelectionChangeEvent event) {
1167                         if (otherSharedTreeSelectionModel.getSelectedObject() != null) {
1168                             deselectOthers(otherSharedTreeView, otherSharedTreeSelectionModel);
1169                             otherSharedTreeView.addStyleName("cellTreeWidget-selectedTree");
1170                             applyPermissions(otherSharedTreeSelectionModel.getSelectedObject());
1171                             updateOtherSharedFolder(otherSharedTreeSelectionModel.getSelectedObject(), true);
1172                                         showRelevantToolbarButtons();
1173                         }
1174                                 else {
1175                                         if (getSelectedTree().equals(otherSharedTreeView))
1176                                                 setSelectedTree(null);
1177                                         if (getSelectedTree() == null)
1178                                                 showRelevantToolbarButtons();
1179                                 }
1180                     }
1181                 });
1182                 selectionModels.add(otherSharedTreeSelectionModel);
1183                 otherSharedTreeViewModel = new OtherSharedTreeViewModel(Pithos.this, otherSharedTreeSelectionModel);
1184                 otherSharedTreeViewModel.initialize(new Command() {
1185
1186                         @Override
1187                         public void execute() {
1188                             otherSharedTreeView = new OtherSharedTreeView(otherSharedTreeViewModel);
1189                                 trees.insert(otherSharedTreeView, 4);
1190                                 treeViews.add(otherSharedTreeView);
1191                         }
1192                 });
1193         }
1194
1195         public native void log1(String message)/*-{
1196                 $wnd.console.log(message);
1197         }-*/;
1198
1199         public String getErrorData() {
1200                 if (error != null)
1201                         return error.toString();
1202                 return "";
1203         }
1204
1205         public void setError(Throwable t) {
1206                 error = t;
1207         }
1208
1209         public void showRelevantToolbarButtons() {
1210                 toolbar.showRelevantButtons();
1211         }
1212
1213         public FileUploadDialog getFileUploadDialog() {
1214                 if (fileUploadDialog == null)
1215                         fileUploadDialog = new FileUploadDialog(this);
1216                 return fileUploadDialog;
1217         }
1218
1219         public void hideUploadIndicator() {
1220                 upload.removeStyleName("pithos-uploadButton-loading");
1221                 upload.setTitle("");
1222         }
1223
1224         public void showUploadIndicator() {
1225                 upload.addStyleName("pithos-uploadButton-loading");
1226                 upload.setTitle("Upload in progress. Click for details.");
1227         }
1228
1229         public void scheduleFolderHeadCommand(final Folder folder, final Command callback) {
1230                 if (folder == null) {
1231                         if (callback != null)
1232                                 callback.execute();
1233                 }
1234                 else {
1235                         HeadRequest<Folder> headFolder = new HeadRequest<Folder>(Folder.class, getApiPath(), folder.getOwner(), folder.getUri(), folder) {
1236
1237                                 @Override
1238                                 public void onSuccess(Folder _result) {
1239                                         if (callback != null)
1240                                                 callback.execute();
1241                                 }
1242
1243                                 @Override
1244                                 public void onError(Throwable t) {
1245                                 if (t instanceof RestException) {
1246                                         if (((RestException) t).getHttpStatusCode() == Response.SC_NOT_FOUND) {
1247                                 final String path = folder.getUri();
1248                                 PutRequest newFolder = new PutRequest(getApiPath(), folder.getOwner(), path) {
1249                                     @Override
1250                                     public void onSuccess(Resource _result) {
1251                                         scheduleFolderHeadCommand(folder, callback);
1252                                     }
1253
1254                                     @Override
1255                                     public void onError(Throwable _t) {
1256                                         GWT.log("", _t);
1257                                                                 setError(_t);
1258                                         if(_t instanceof RestException){
1259                                             displayError("Unable to create folder: " + ((RestException) _t).getHttpStatusText());
1260                                         }
1261                                         else
1262                                             displayError("System error creating folder: " + _t.getMessage());
1263                                     }
1264
1265                                                 @Override
1266                                                 protected void onUnauthorized(Response response) {
1267                                                         sessionExpired();
1268                                                 }
1269                                 };
1270                                 newFolder.setHeader("X-Auth-Token", getToken());
1271                                 newFolder.setHeader("Content-Type", "application/folder");
1272                                 newFolder.setHeader("Accept", "*/*");
1273                                 newFolder.setHeader("Content-Length", "0");
1274                                 Scheduler.get().scheduleDeferred(newFolder);
1275                                         }
1276                                         else
1277                                                 displayError("Error heading folder: " + ((RestException) t).getHttpStatusText());
1278                                 }
1279                                 else
1280                                     displayError("System error heading folder: " + t.getMessage());
1281
1282                                 GWT.log("Error heading folder", t);
1283                                         setError(t);
1284                                 }
1285
1286                                 @Override
1287                                 protected void onUnauthorized(Response response) {
1288                                         sessionExpired();
1289                                 }
1290                         };
1291                         headFolder.setHeader("X-Auth-Token", getToken());
1292                         Scheduler.get().scheduleDeferred(headFolder);
1293                 }
1294         }
1295
1296         public void scheduleFileHeadCommand(File f, final Command callback) {
1297                 HeadRequest<File> headFile = new HeadRequest<File>(File.class, getApiPath(), f.getOwner(), f.getUri(), f) {
1298
1299                         @Override
1300                         public void onSuccess(File _result) {
1301                                 if (callback != null)
1302                                         callback.execute();
1303                         }
1304
1305                         @Override
1306                         public void onError(Throwable t) {
1307                         GWT.log("Error heading file", t);
1308                                 setError(t);
1309                         if (t instanceof RestException)
1310                             displayError("Error heading file: " + ((RestException) t).getHttpStatusText());
1311                         else
1312                             displayError("System error heading file: " + t.getMessage());
1313                         }
1314
1315                         @Override
1316                         protected void onUnauthorized(Response response) {
1317                                 sessionExpired();
1318                         }
1319                 };
1320                 headFile.setHeader("X-Auth-Token", getToken());
1321                 Scheduler.get().scheduleDeferred(headFile);
1322         }
1323 }