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     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         trees = new VerticalPanel();
 369         trees.setWidth("100%");
 370
 371         trees.add(folderTreeView);
 372
 373         HorizontalPanel separator = new HorizontalPanel();
 374         separator.addStyleName("pithos-statisticsSeparator");
 375         trees.add(separator);
 376
 377         HorizontalPanel statistics = new HorizontalPanel();
 378             statistics.addStyleName("pithos-statistics");
 379             statistics.add(new HTML("Used:&nbsp;"));
 380             usedBytes = new HTML();
 381             statistics.add(usedBytes);
 382             statistics.add(new HTML("&nbsp;of&nbsp;"));
 383             totalBytes = new HTML();
 384             statistics.add(totalBytes);
 385             statistics.add(new HTML("&nbsp;("));
 386             usedPercent = new HTML();
 387             statistics.add(usedPercent);
 388             statistics.add(new HTML(")"));
 389         trees.add(statistics);
 390
 391         // Add the left and right panels to the split panel.
 392         splitPanel.setLeftWidget(trees);
 393         splitPanel.setRightWidget(inner);
 394         splitPanel.setSplitPosition("219px");
 395         splitPanel.setSize("100%", "100%");
 396         splitPanel.addStyleName("pithos-splitPanel");
 397         splitPanel.setWidth(contentWidth);
 398         outer.add(splitPanel);
 399         outer.setCellHorizontalAlignment(splitPanel, HasHorizontalAlignment.ALIGN_CENTER);
 400
 401         if (!bareContent) {
 402                 statusPanel = new StatusPanel();
 403                 statusPanel.setWidth("100%");
 404                 outer.add(statusPanel);
 405                 outer.setCellHorizontalAlignment(statusPanel, HasHorizontalAlignment.ALIGN_CENTER);
 406         }
 407         else
 408                 splitPanel.addStyleName("pithos-splitPanel-noframe");
 409
 410         // Hook the window resize event, so that we can adjust the UI.
 411         Window.addResizeHandler(this);
 412         // Clear out the window's built-in margin, because we want to take
 413         // advantage of the entire client area.
 414         Window.setMargin("0px");
 415         // Finally, add the outer panel to the RootPanel, so that it will be
 416         // displayed.
 417         RootPanel.get().add(outer);
 418         // Call the window resized handler to get the initial sizes setup. Doing
 419         // this in a deferred command causes it to occur after all widgets'
 420         // sizes have been computed by the browser.
 421         Scheduler.get().scheduleDeferred(new ScheduledCommand() {
 422
 423             @Override
 424             public void execute() {
 425                 onWindowResized(Window.getClientHeight());
 426             }
 427         });
 428
 429         Scheduler.get().scheduleDeferred(new ScheduledCommand() {
 430             @Override
 431             public void execute() {
 432                 fetchAccount(new Command() {
 433
 434                                         @Override
 435                                         public void execute() {
 436                                 if (!account.hasHomeContainer())
 437                                     createHomeContainer(account, this);
 438                                 else if (!account.hasTrashContainer())
 439                                         createTrashContainer(this);
 440                                 else {
 441                                         for (Folder f : account.getContainers())
 442                                                 if (f.getName().equals(Pithos.TRASH_CONTAINER)) {
 443                                                         trash = f;
 444                                                         break;
 445                                                 }
 446                                     folderTreeViewModel.initialize(account, new Command() {
 447
 448                                                                 @Override
 449                                                                 public void execute() {
 450                                                     createMySharedTree();
 451                                                                 }
 452                                                         });
 453                                     groupTreeViewModel = new GroupTreeViewModel(Pithos.this);
 454                                     groupTreeView = new GroupTreeView(groupTreeViewModel);
 455                                     treeViews.add(groupTreeView);
 456                                     trees.add(groupTreeView);
 457                                     showStatistics();
 458                                 }
 459                                         }
 460                                 });
 461             }
 462         });
 463
 464         Scheduler.get().scheduleFixedDelay(new RepeatingCommand() {
 465
 466                         @Override
 467                         public boolean execute() {
 468                                 Folder f = getSelection();
 469                                 if (f != null) {
 470                                         if (getSelectedTree().equals(folderTreeView))
 471                                                 updateFolder(f, true, null, false);
 472                                         else if (getSelectedTree().equals(mysharedTreeView))
 473                                                 updateSharedFolder(f, true);
 474                                 }
 475                                 return true;
 476                         }
 477                 }, 3000);
 478     }
 479
 480     public void applyPermissions(Folder f) {
 481         if (f != null) {
 482                 if (f.isInTrash())
 483                         upload.setEnabled(false);
 484                 else {
 485                         Boolean[] perms = f.getPermissions().get(username);
 486                         if (f.getOwner().equals(username) || (perms != null && perms[1] != null && perms[1])) {
 487                                 upload.setEnabled(true);
 488                         }
 489                         else
 490                                 upload.setEnabled(false);
 491                 }
 492         }
 493         else
 494                 upload.setEnabled(false);
 495         }
 496
 497         @SuppressWarnings({ "rawtypes", "unchecked" })
 498         public void deselectOthers(TreeView _selectedTree, SingleSelectionModel model) {
 499         selectedTree = _selectedTree;
 500
 501         for (Composite c : treeViews)
 502                 if (c.equals(selectedTree))
 503                         c.addStyleName("cellTreeWidget-selectedTree");
 504                 else
 505                         c.removeStyleName("cellTreeWidget-selectedTree");
 506
 507         for (SingleSelectionModel s : selectionModels)
 508             if (!s.equals(model) && s.getSelectedObject() != null)
 509                 s.setSelected(s.getSelectedObject(), false);
 510     }
 511
 512     public void showFiles(final Folder f) {
 513         Set<File> files = f.getFiles();
 514         showFiles(files);
 515     }
 516
 517     public void showFiles(Set<File> files) {
 518         fileList.setFiles(new ArrayList<File>(files));
 519     }
 520
 521     /**
 522          * Parse and store the user credentials to the appropriate fields.
 523          */
 524         private boolean parseUserCredentials() {
 525         Configuration conf = (Configuration) GWT.create(Configuration.class);
 526                 Dictionary otherProperties = Dictionary.getDictionary("otherProperties");
 527         String cookie = otherProperties.get("authCookie");
 528         String auth = Cookies.getCookie(cookie);
 529         if (auth == null) {
 530             authenticateUser();
 531             return false;
 532         }
 533         if (auth.startsWith("\""))
 534                 auth = auth.substring(1);
 535         if (auth.endsWith("\""))
 536                 auth = auth.substring(0, auth.length() - 1);
 537                 String[] authSplit = auth.split("\\" + conf.cookieSeparator(), 2);
 538                 if (authSplit.length != 2) {
 539                     authenticateUser();
 540                     return false;
 541                 }
 542                 username = authSplit[0];
 543                 token = authSplit[1];
 544
 545         String gotoUrl = Window.Location.getParameter("goto");
 546                 if (gotoUrl != null && gotoUrl.length() > 0) {
 547                         Window.Location.assign(gotoUrl);
 548                         return false;
 549                 }
 550                 return true;
 551     }
 552
 553     /**
 554          * Redirect the user to the login page for authentication.
 555          */
 556         protected void authenticateUser() {
 557                 Dictionary otherProperties = Dictionary.getDictionary("otherProperties");
 558         Window.Location.assign(otherProperties.get("loginUrl") + Window.Location.getHref());
 559         }
 560
 561         protected void fetchAccount(final Command callback) {
 562         String path = "?format=json";
 563
 564         GetRequest<AccountResource> getAccount = new GetRequest<AccountResource>(AccountResource.class, getApiPath(), username, path) {
 565             @Override
 566             public void onSuccess(AccountResource _result) {
 567                 account = _result;
 568                 if (callback != null)
 569                         callback.execute();
 570             }
 571
 572             @Override
 573             public void onError(Throwable t) {
 574                 GWT.log("Error getting account", t);
 575                                 setError(t);
 576                 if (t instanceof RestException)
 577                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 578                 else
 579                     displayError("System error fetching user data: " + t.getMessage());
 580             }
 581
 582                         @Override
 583                         protected void onUnauthorized(Response response) {
 584                                 sessionExpired();
 585                         }
 586         };
 587         getAccount.setHeader("X-Auth-Token", token);
 588         Scheduler.get().scheduleDeferred(getAccount);
 589     }
 590
 591     public void updateStatistics() {
 592         HeadRequest<AccountResource> headAccount = new HeadRequest<AccountResource>(AccountResource.class, getApiPath(), username, "", account) {
 593
 594                         @Override
 595                         public void onSuccess(AccountResource _result) {
 596                                 showStatistics();
 597                         }
 598
 599                         @Override
 600                         public void onError(Throwable t) {
 601                 GWT.log("Error getting account", t);
 602                                 setError(t);
 603                 if (t instanceof RestException)
 604                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 605                 else
 606                     displayError("System error fetching user data: " + t.getMessage());
 607                         }
 608
 609                         @Override
 610                         protected void onUnauthorized(Response response) {
 611                                 sessionExpired();
 612                         }
 613                 };
 614                 headAccount.setHeader("X-Auth-Token", token);
 615                 Scheduler.get().scheduleDeferred(headAccount);
 616         }
 617
 618         protected void showStatistics() {
 619         usedBytes.setHTML(String.valueOf(account.getFileSizeAsString()));
 620         totalBytes.setHTML(String.valueOf(account.getQuotaAsString()));
 621         NumberFormat nf = NumberFormat.getPercentFormat();
 622         usedPercent.setHTML(nf.format(account.getUsedPercentage()));
 623         }
 624
 625         protected void createHomeContainer(final AccountResource _account, final Command callback) {
 626         String path = "/" + Pithos.HOME_CONTAINER;
 627         PutRequest createPithos = new PutRequest(getApiPath(), getUsername(), path) {
 628             @Override
 629             public void onSuccess(Resource result) {
 630                 if (!_account.hasTrashContainer())
 631                         createTrashContainer(callback);
 632                 else
 633                         fetchAccount(callback);
 634             }
 635
 636             @Override
 637             public void onError(Throwable t) {
 638                 GWT.log("Error creating pithos", t);
 639                                 setError(t);
 640                 if (t instanceof RestException)
 641                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 642                 else
 643                     displayError("System error Error creating pithos: " + t.getMessage());
 644             }
 645
 646                         @Override
 647                         protected void onUnauthorized(Response response) {
 648                                 sessionExpired();
 649                         }
 650         };
 651         createPithos.setHeader("X-Auth-Token", getToken());
 652         Scheduler.get().scheduleDeferred(createPithos);
 653     }
 654
 655     protected void createTrashContainer(final Command callback) {
 656         String path = "/" + Pithos.TRASH_CONTAINER;
 657         PutRequest createPithos = new PutRequest(getApiPath(), getUsername(), path) {
 658             @Override
 659             public void onSuccess(Resource result) {
 660                         fetchAccount(callback);
 661             }
 662
 663             @Override
 664             public void onError(Throwable t) {
 665                 GWT.log("Error creating pithos", t);
 666                                 setError(t);
 667                 if (t instanceof RestException)
 668                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 669                 else
 670                     displayError("System error Error creating pithos: " + t.getMessage());
 671             }
 672
 673                         @Override
 674                         protected void onUnauthorized(Response response) {
 675                                 sessionExpired();
 676                         }
 677         };
 678         createPithos.setHeader("X-Auth-Token", getToken());
 679         Scheduler.get().scheduleDeferred(createPithos);
 680     }
 681
 682     /**
 683          * Creates an HTML fragment that places an image & caption together, for use
 684          * in a group header.
 685          *
 686          * @param imageProto an image prototype for an image
 687          * @param caption the group caption
 688          * @return the header HTML fragment
 689          */
 690         private String createHeaderHTML(AbstractImagePrototype imageProto, String caption) {
 691                 String captionHTML = "<table class='caption' cellpadding='0' "
 692                 + "cellspacing='0'>" + "<tr><td class='lcaption'>" + imageProto.getHTML()
 693                 + "</td><td id =" + caption +" class='rcaption'><b style='white-space:nowrap'>&nbsp;"
 694                 + caption + "</b></td></tr></table>";
 695                 return captionHTML;
 696         }
 697
 698         protected void onWindowResized(int height) {
 699                 // Adjust the split panel to take up the available room in the window.
 700                 int newHeight = height - splitPanel.getAbsoluteTop();
 701                 if (newHeight < 1)
 702                         newHeight = 1;
 703                 splitPanel.setHeight("" + newHeight);
 704                 inner.setHeight("" + newHeight);
 705         }
 706
 707         @Override
 708         public void onResize(ResizeEvent event) {
 709                 int height = event.getHeight();
 710                 onWindowResized(height);
 711         }
 712
 713         /**
 714          * Display an error message.
 715          *
 716          * @param msg the message to display
 717          */
 718         public void displayError(String msg) {
 719                 messagePanel.displayError(msg);
 720         }
 721
 722         /**
 723          * Display a warning message.
 724          *
 725          * @param msg the message to display
 726          */
 727         public void displayWarning(String msg) {
 728                 messagePanel.displayWarning(msg);
 729         }
 730
 731         /**
 732          * Display an informational message.
 733          *
 734          * @param msg the message to display
 735          */
 736         public void displayInformation(String msg) {
 737                 messagePanel.displayInformation(msg);
 738         }
 739
 740         /**
 741          * Retrieve the fileList.
 742          *
 743          * @return the fileList
 744          */
 745         public FileList getFileList() {
 746                 return fileList;
 747         }
 748
 749         /**
 750          * Retrieve the topPanel.
 751          *
 752          * @return the topPanel
 753          */
 754         TopPanel getTopPanel() {
 755                 return topPanel;
 756         }
 757
 758         /**
 759          * Retrieve the clipboard.
 760          *
 761          * @return the clipboard
 762          */
 763         public Clipboard getClipboard() {
 764                 return clipboard;
 765         }
 766
 767         public StatusPanel getStatusPanel() {
 768                 return statusPanel;
 769         }
 770
 771         public String getToken() {
 772                 return token;
 773         }
 774
 775         public static native void preventIESelection() /*-{
 776                 $doc.body.onselectstart = function () { return false; };
 777         }-*/;
 778
 779         public static native void enableIESelection() /*-{
 780                 if ($doc.body.onselectstart != null)
 781                 $doc.body.onselectstart = null;
 782         }-*/;
 783
 784         /**
 785          * @return the absolute path of the API root URL
 786          */
 787         public String getApiPath() {
 788                 Configuration conf = (Configuration) GWT.create(Configuration.class);
 789                 return conf.apiPath();
 790         }
 791
 792         /**
 793          * History support for folder navigation
 794          * adds a new browser history entry
 795          *
 796          * @param key
 797          */
 798         public void updateHistory(String key){
 799 //              Replace any whitespace of the initial string to "+"
 800 //              String result = key.replaceAll("\\s","+");
 801 //              Add a new browser history entry.
 802 //              History.newItem(result);
 803                 History.newItem(key);
 804         }
 805
 806     public void deleteFolder(final Folder folder, final Command callback) {
 807         String path = getApiPath() + folder.getOwner() + "/" + folder.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(folder.getPrefix()) + "&t=" + System.currentTimeMillis();
 808         RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, path);
 809         builder.setHeader("X-Auth-Token", getToken());
 810         try {
 811             builder.sendRequest("", new RequestCallback() {
 812                 @Override
 813                 public void onResponseReceived(Request request, Response response) {
 814                     if (response.getStatusCode() == Response.SC_OK) {
 815                         JSONValue json = JSONParser.parseStrict(response.getText());
 816                         JSONArray array = json.isArray();
 817                         int i = 0;
 818                         if (array != null) {
 819                             deleteObject(folder, i, array, callback);
 820                         }
 821                     }
 822                 }
 823
 824                 @Override
 825                 public void onError(Request request, Throwable exception) {
 826                         setError(exception);
 827                     displayError("System error unable to delete folder: " + exception.getMessage());
 828                 }
 829             });
 830         }
 831         catch (RequestException e) {
 832         }
 833     }
 834
 835     void deleteObject(final Folder folder, final int i, final JSONArray array, final Command callback) {
 836         if (i < array.size()) {
 837             JSONObject o = array.get(i).isObject();
 838             if (o != null && !o.containsKey("subdir")) {
 839                 JSONString name = o.get("name").isString();
 840                 String path = "/" + folder.getContainer() + "/" + name.stringValue();
 841                 DeleteRequest delete = new DeleteRequest(getApiPath(), folder.getOwner(), URL.encode(path)) {
 842                     @Override
 843                     public void onSuccess(Resource result) {
 844                         deleteObject(folder, i + 1, array, callback);
 845                     }
 846
 847                     @Override
 848                     public void onError(Throwable t) {
 849                         GWT.log("", t);
 850                                                 setError(t);
 851                         displayError("System error unable to delete folder: " + t.getMessage());
 852                     }
 853
 854                                 @Override
 855                                 protected void onUnauthorized(Response response) {
 856                                         sessionExpired();
 857                                 }
 858                 };
 859                 delete.setHeader("X-Auth-Token", getToken());
 860                 Scheduler.get().scheduleDeferred(delete);
 861             }
 862             else if (o != null) {
 863                 String subdir = o.get("subdir").isString().stringValue();
 864                 subdir = subdir.substring(0, subdir.length() - 1);
 865                 String path = getApiPath() + getUsername() + "/" + folder.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(subdir) + "&t=" + System.currentTimeMillis();
 866                 RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, path);
 867                 builder.setHeader("X-Auth-Token", getToken());
 868                 try {
 869                     builder.sendRequest("", new RequestCallback() {
 870                         @Override
 871                         public void onResponseReceived(Request request, Response response) {
 872                             if (response.getStatusCode() == Response.SC_OK) {
 873                                 JSONValue json = JSONParser.parseStrict(response.getText());
 874                                 JSONArray array2 = json.isArray();
 875                                 if (array2 != null) {
 876                                     int l = array.size();
 877                                     for (int j=0; j<array2.size(); j++) {
 878                                         array.set(l++, array2.get(j));
 879                                     }
 880                                 }
 881                                 deleteObject(folder, i + 1, array, callback);
 882                             }
 883                         }
 884
 885                         @Override
 886                         public void onError(Request request, Throwable exception) {
 887                                 setError(exception);
 888                             displayError("System error unable to delete folder: " + exception.getMessage());
 889                         }
 890                     });
 891                 }
 892                 catch (RequestException e) {
 893                 }
 894             }
 895         }
 896         else {
 897             String path = folder.getUri();
 898             DeleteRequest deleteFolder = new DeleteRequest(getApiPath(), getUsername(), URL.encode(path)) {
 899                 @Override
 900                 public void onSuccess(Resource result) {
 901                     updateFolder(folder.getParent(), true, new Command() {
 902
 903                                                 @Override
 904                                                 public void execute() {
 905                                                         folderTreeSelectionModel.setSelected(folder.getParent(), true);
 906                                                         updateStatistics();
 907                                                         if (callback != null)
 908                                                                 callback.execute();
 909                                                 }
 910                                         }, true);
 911                 }
 912
 913                 @Override
 914                 public void onError(Throwable t) {
 915                     GWT.log("", t);
 916                                         setError(t);
 917                     if (t instanceof RestException) {
 918                         if (((RestException) t).getHttpStatusCode() != Response.SC_NOT_FOUND)
 919                                 displayError("Unable to delete folder: "+((RestException) t).getHttpStatusText());
 920                         else
 921                                 onSuccess(null);
 922                     }
 923                     else
 924                         displayError("System error unable to delete folder: " + t.getMessage());
 925                 }
 926
 927                                 @Override
 928                                 protected void onUnauthorized(Response response) {
 929                                         sessionExpired();
 930                                 }
 931             };
 932             deleteFolder.setHeader("X-Auth-Token", getToken());
 933             Scheduler.get().scheduleDeferred(deleteFolder);
 934         }
 935     }
 936
 937     public FolderTreeView getFolderTreeView() {
 938         return folderTreeView;
 939     }
 940
 941     public void copyFiles(final Iterator<File> iter, final String targetUsername, final String targetUri, final Command callback) {
 942         if (iter.hasNext()) {
 943             File file = iter.next();
 944             String path = targetUri + "/" + file.getName();
 945             PutRequest copyFile = new PutRequest(getApiPath(), targetUsername, path) {
 946                 @Override
 947                 public void onSuccess(Resource result) {
 948                     copyFiles(iter, targetUsername, targetUri, callback);
 949                 }
 950
 951                 @Override
 952                 public void onError(Throwable t) {
 953                     GWT.log("", t);
 954                                         setError(t);
 955                     if (t instanceof RestException) {
 956                         displayError("Unable to copy file: " + ((RestException) t).getHttpStatusText());
 957                     }
 958                     else
 959                         displayError("System error unable to copy file: "+t.getMessage());
 960                 }
 961
 962                                 @Override
 963                                 protected void onUnauthorized(Response response) {
 964                                         sessionExpired();
 965                                 }
 966             };
 967             copyFile.setHeader("X-Auth-Token", getToken());
 968             copyFile.setHeader("X-Copy-From", URL.encodePathSegment(file.getUri()));
 969             if (!file.getOwner().equals(targetUsername))
 970                 copyFile.setHeader("X-Source-Account", URL.encodePathSegment(file.getOwner()));
 971             copyFile.setHeader("Content-Type", file.getContentType());
 972             Scheduler.get().scheduleDeferred(copyFile);
 973         }
 974         else  if (callback != null) {
 975             callback.execute();
 976         }
 977     }
 978
 979     public void copySubfolders(final Iterator<Folder> iter, final String targetUsername, final String targetUri, final Command callback) {
 980         if (iter.hasNext()) {
 981             final Folder f = iter.next();
 982             copyFolder(f, targetUsername, targetUri, new Command() {
 983
 984                                 @Override
 985                                 public void execute() {
 986                                         copySubfolders(iter, targetUsername, targetUri, callback);
 987                                 }
 988                         });
 989         }
 990         else  if (callback != null) {
 991             callback.execute();
 992         }
 993     }
 994
 995     public void copyFolder(final Folder f, final String targetUsername, final String targetUri, final Command callback) {
 996         String path = targetUri + "/" + f.getName();
 997         PutRequest createFolder = new PutRequest(getApiPath(), targetUsername, path) {
 998             @Override
 999             public void onSuccess(Resource result) {
1000                 GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, getApiPath(), f.getOwner(), "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix()), f) {
1001
1002                                         @Override
1003                                         public void onSuccess(final Folder _f) {
1004                                 Iterator<File> iter = _f.getFiles().iterator();
1005                                 copyFiles(iter, targetUsername, targetUri + "/" + _f.getName(), new Command() {
1006                                     @Override
1007                                     public void execute() {
1008                                         Iterator<Folder> iterf = _f.getSubfolders().iterator();
1009                                         copySubfolders(iterf, targetUsername, targetUri + "/" + _f.getName(), callback);
1010                                     }
1011                                 });
1012                                         }
1013
1014                                         @Override
1015                                         public void onError(Throwable t) {
1016                                 GWT.log("", t);
1017                                                 setError(t);
1018                                 if (t instanceof RestException) {
1019                                     displayError("Unable to get folder: " + ((RestException) t).getHttpStatusText());
1020                                 }
1021                                 else
1022                                     displayError("System error getting folder: " + t.getMessage());
1023                                         }
1024
1025                                         @Override
1026                                         protected void onUnauthorized(Response response) {
1027                                                 sessionExpired();
1028                                         }
1029                                 };
1030                                 getFolder.setHeader("X-Auth-Token", getToken());
1031                                 Scheduler.get().scheduleDeferred(getFolder);
1032             }
1033
1034             @Override
1035             public void onError(Throwable t) {
1036                 GWT.log("", t);
1037                                 setError(t);
1038                if (t instanceof RestException) {
1039                     displayError("Unable to create folder: " + ((RestException) t).getHttpStatusText());
1040                 }
1041                 else
1042                     displayError("System error creating folder: " + t.getMessage());
1043             }
1044
1045                         @Override
1046                         protected void onUnauthorized(Response response) {
1047                                 sessionExpired();
1048                         }
1049         };
1050         createFolder.setHeader("X-Auth-Token", getToken());
1051         createFolder.setHeader("Accept", "*/*");
1052         createFolder.setHeader("Content-Length", "0");
1053         createFolder.setHeader("Content-Type", "application/folder");
1054         Scheduler.get().scheduleDeferred(createFolder);
1055     }
1056
1057     public void addSelectionModel(@SuppressWarnings("rawtypes") SingleSelectionModel model) {
1058         selectionModels.add(model);
1059     }
1060
1061         public OtherSharedTreeView getOtherSharedTreeView() {
1062                 return otherSharedTreeView;
1063         }
1064
1065         public void updateTrash(boolean showFiles, Command callback) {
1066                 updateFolder(trash, showFiles, callback, true);
1067         }
1068
1069         public void updateGroupsNode() {
1070                 groupTreeView.updateGroupNode(null);
1071         }
1072
1073         public void addGroup(String groupname) {
1074                 Group newGroup = new Group(groupname);
1075                 account.addGroup(newGroup);
1076                 groupTreeView.updateGroupNode(null);
1077         }
1078
1079         public void removeGroup(Group group) {
1080                 account.removeGroup(group);
1081                 updateGroupsNode();
1082         }
1083
1084         public TreeView getSelectedTree() {
1085                 return selectedTree;
1086         }
1087
1088         public void setSelectedTree(TreeView selected) {
1089                 selectedTree = selected;
1090         }
1091
1092         public Folder getSelection() {
1093                 if (selectedTree != null)
1094                         return selectedTree.getSelection();
1095                 return null;
1096         }
1097
1098         public void showFolderStatistics(int folderFileCount) {
1099                 numOfFiles.setHTML(String.valueOf(folderFileCount));
1100         }
1101
1102         public GroupTreeView getGroupTreeView() {
1103                 return groupTreeView;
1104         }
1105
1106         public void sessionExpired() {
1107                 new SessionExpiredDialog(this).center();
1108         }
1109
1110         public void updateRootFolder(Command callback) {
1111                 updateFolder(account.getPithos(), false, callback, true);
1112         }
1113
1114         void createMySharedTree() {
1115                 mysharedTreeSelectionModel = new SingleSelectionModel<Folder>();
1116                 mysharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
1117                     @Override
1118                     public void onSelectionChange(SelectionChangeEvent event) {
1119                         if (mysharedTreeSelectionModel.getSelectedObject() != null) {
1120                             deselectOthers(mysharedTreeView, mysharedTreeSelectionModel);
1121                             upload.setEnabled(false);
1122                             updateSharedFolder(mysharedTreeSelectionModel.getSelectedObject(), true);
1123                                         showRelevantToolbarButtons();
1124                         }
1125                                 else {
1126                                         if (getSelectedTree().equals(mysharedTreeView))
1127                                                 setSelectedTree(null);
1128                                         if (getSelectedTree() == null)
1129                                                 showRelevantToolbarButtons();
1130                                 }
1131                     }
1132                 });
1133                 selectionModels.add(mysharedTreeSelectionModel);
1134                 mysharedTreeViewModel = new MysharedTreeViewModel(Pithos.this, mysharedTreeSelectionModel);
1135                 mysharedTreeViewModel.initialize(new Command() {
1136
1137                         @Override
1138                         public void execute() {
1139                             mysharedTreeView = new MysharedTreeView(mysharedTreeViewModel);
1140                                 trees.insert(mysharedTreeView, 3);
1141                                 treeViews.add(mysharedTreeView);
1142                                 createOtherSharedTree();
1143                         }
1144                 });
1145         }
1146
1147         void createOtherSharedTree() {
1148                 otherSharedTreeSelectionModel = new SingleSelectionModel<Folder>();
1149                 otherSharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
1150                     @Override
1151                     public void onSelectionChange(SelectionChangeEvent event) {
1152                         if (otherSharedTreeSelectionModel.getSelectedObject() != null) {
1153                             deselectOthers(otherSharedTreeView, otherSharedTreeSelectionModel);
1154                             otherSharedTreeView.addStyleName("cellTreeWidget-selectedTree");
1155                             applyPermissions(otherSharedTreeSelectionModel.getSelectedObject());
1156                             updateOtherSharedFolder(otherSharedTreeSelectionModel.getSelectedObject(), true);
1157                                         showRelevantToolbarButtons();
1158                         }
1159                                 else {
1160                                         if (getSelectedTree().equals(otherSharedTreeView))
1161                                                 setSelectedTree(null);
1162                                         if (getSelectedTree() == null)
1163                                                 showRelevantToolbarButtons();
1164                                 }
1165                     }
1166                 });
1167                 selectionModels.add(otherSharedTreeSelectionModel);
1168                 otherSharedTreeViewModel = new OtherSharedTreeViewModel(Pithos.this, otherSharedTreeSelectionModel);
1169                 otherSharedTreeViewModel.initialize(new Command() {
1170
1171                         @Override
1172                         public void execute() {
1173                             otherSharedTreeView = new OtherSharedTreeView(otherSharedTreeViewModel);
1174                                 trees.insert(otherSharedTreeView, 3);
1175                                 treeViews.add(otherSharedTreeView);
1176                         }
1177                 });
1178         }
1179
1180         public native void log1(String message)/*-{
1181                 $wnd.console.log(message);
1182         }-*/;
1183
1184         public String getErrorData() {
1185                 if (error != null)
1186                         return error.toString();
1187                 return "";
1188         }
1189
1190         public void setError(Throwable t) {
1191                 error = t;
1192         }
1193
1194         public void showRelevantToolbarButtons() {
1195                 toolbar.showRelevantButtons();
1196         }
1197
1198         public FileUploadDialog getFileUploadDialog() {
1199                 if (fileUploadDialog == null)
1200                         fileUploadDialog = new FileUploadDialog(this);
1201                 return fileUploadDialog;
1202         }
1203
1204         public void hideUploadIndicator() {
1205                 upload.removeStyleName("pithos-uploadButton-loading");
1206                 upload.setTitle("");
1207         }
1208
1209         public void showUploadIndicator() {
1210                 upload.addStyleName("pithos-uploadButton-loading");
1211                 upload.setTitle("Upload in progress. Click for details.");
1212         }
1213
1214         public void scheduleFolderHeadCommand(final Folder folder, final Command callback) {
1215                 if (folder == null) {
1216                         if (callback != null)
1217                                 callback.execute();
1218                 }
1219                 else {
1220                         HeadRequest<Folder> headFolder = new HeadRequest<Folder>(Folder.class, getApiPath(), folder.getOwner(), folder.getUri(), folder) {
1221
1222                                 @Override
1223                                 public void onSuccess(Folder _result) {
1224                                         if (callback != null)
1225                                                 callback.execute();
1226                                 }
1227
1228                                 @Override
1229                                 public void onError(Throwable t) {
1230                                 if (t instanceof RestException) {
1231                                         if (((RestException) t).getHttpStatusCode() == Response.SC_NOT_FOUND) {
1232                                 final String path = folder.getUri();
1233                                 PutRequest newFolder = new PutRequest(getApiPath(), folder.getOwner(), path) {
1234                                     @Override
1235                                     public void onSuccess(Resource _result) {
1236                                         scheduleFolderHeadCommand(folder, callback);
1237                                     }
1238
1239                                     @Override
1240                                     public void onError(Throwable _t) {
1241                                         GWT.log("", _t);
1242                                                                 setError(_t);
1243                                         if(_t instanceof RestException){
1244                                             displayError("Unable to create folder: " + ((RestException) _t).getHttpStatusText());
1245                                         }
1246                                         else
1247                                             displayError("System error creating folder: " + _t.getMessage());
1248                                     }
1249
1250                                                 @Override
1251                                                 protected void onUnauthorized(Response response) {
1252                                                         sessionExpired();
1253                                                 }
1254                                 };
1255                                 newFolder.setHeader("X-Auth-Token", getToken());
1256                                 newFolder.setHeader("Content-Type", "application/folder");
1257                                 newFolder.setHeader("Accept", "*/*");
1258                                 newFolder.setHeader("Content-Length", "0");
1259                                 Scheduler.get().scheduleDeferred(newFolder);
1260                                         }
1261                                         else
1262                                                 displayError("Error heading folder: " + ((RestException) t).getHttpStatusText());
1263                                 }
1264                                 else
1265                                     displayError("System error heading folder: " + t.getMessage());
1266
1267                                 GWT.log("Error heading folder", t);
1268                                         setError(t);
1269                                 }
1270
1271                                 @Override
1272                                 protected void onUnauthorized(Response response) {
1273                                         sessionExpired();
1274                                 }
1275                         };
1276                         headFolder.setHeader("X-Auth-Token", getToken());
1277                         Scheduler.get().scheduleDeferred(headFolder);
1278                 }
1279         }
1280
1281         public void scheduleFileHeadCommand(File f, final Command callback) {
1282                 HeadRequest<File> headFile = new HeadRequest<File>(File.class, getApiPath(), f.getOwner(), f.getUri(), f) {
1283
1284                         @Override
1285                         public void onSuccess(File _result) {
1286                                 if (callback != null)
1287                                         callback.execute();
1288                         }
1289
1290                         @Override
1291                         public void onError(Throwable t) {
1292                         GWT.log("Error heading file", t);
1293                                 setError(t);
1294                         if (t instanceof RestException)
1295                             displayError("Error heading file: " + ((RestException) t).getHttpStatusText());
1296                         else
1297                             displayError("System error heading file: " + t.getMessage());
1298                         }
1299
1300                         @Override
1301                         protected void onUnauthorized(Response response) {
1302                                 sessionExpired();
1303                         }
1304                 };
1305                 headFile.setHeader("X-Auth-Token", getToken());
1306                 Scheduler.get().scheduleDeferred(headFile);
1307         }
1308 }