code.grnet.gr Git - pithos/blob - src/gr/ebs/gss/client/FileUploadGearsDialog.java

   1 /*
   2  * Copyright 2009 Electronic Business Systems Ltd.
   3  *
   4  * This file is part of GSS.
   5  *
   6  * GSS is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * GSS is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with GSS.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19 package gr.ebs.gss.client;
  20
  21 import gr.ebs.gss.client.rest.PostCommand;
  22 import gr.ebs.gss.client.rest.RestCommand;
  23 import gr.ebs.gss.client.rest.RestException;
  24 import gr.ebs.gss.client.rest.resource.FileResource;
  25 import gr.ebs.gss.client.rest.resource.FolderResource;
  26
  27 import java.util.ArrayList;
  28 import java.util.Arrays;
  29 import java.util.HashMap;
  30 import java.util.List;
  31 import java.util.Map;
  32
  33 import com.google.gwt.core.client.GWT;
  34 import com.google.gwt.event.dom.client.ClickEvent;
  35 import com.google.gwt.event.dom.client.ClickHandler;
  36 import com.google.gwt.gears.client.Factory;
  37 import com.google.gwt.gears.client.desktop.Desktop;
  38 import com.google.gwt.gears.client.desktop.File;
  39 import com.google.gwt.gears.client.desktop.OpenFilesHandler;
  40 import com.google.gwt.gears.client.httprequest.HttpRequest;
  41 import com.google.gwt.gears.client.httprequest.ProgressEvent;
  42 import com.google.gwt.gears.client.httprequest.ProgressHandler;
  43 import com.google.gwt.gears.client.httprequest.RequestCallback;
  44 import com.google.gwt.http.client.URL;
  45 import com.google.gwt.json.client.JSONObject;
  46 import com.google.gwt.json.client.JSONString;
  47 import com.google.gwt.user.client.Command;
  48 import com.google.gwt.user.client.DeferredCommand;
  49 import com.google.gwt.user.client.ui.Button;
  50 import com.google.gwt.user.client.ui.FlexTable;
  51 import com.google.gwt.user.client.ui.HTML;
  52 import com.google.gwt.user.client.ui.HasHorizontalAlignment;
  53 import com.google.gwt.user.client.ui.HorizontalPanel;
  54 import com.google.gwt.user.client.ui.VerticalPanel;
  55
  56 /**
  57  * The 'File upload' dialog box implementation with Google Gears support.
  58  */
  59 public class FileUploadGearsDialog extends FileUploadDialog implements Updateable {
  60
  61         protected final Factory factory = Factory.getInstance();
  62
  63         /**
  64          * The array of files to upload.
  65          */
  66         private File[] fileObjects;
  67
  68         /**
  69          * A list of files to upload, created from files array. Used to signal
  70          * finished state when empty.
  71          */
  72         protected List<File> selectedFiles = new ArrayList<File>();
  73
  74         /**
  75          * The list of progress bars for individual files.
  76          */
  77         protected List<ProgressBar> progressBars = new ArrayList<ProgressBar>();
  78
  79         private Button browse;
  80
  81         private Button submit;
  82
  83         private FlexTable generalTable;
  84
  85         private Map<String, FileResource> toRename;
  86
  87         protected List<HttpRequest> requests = new ArrayList<HttpRequest>();
  88
  89         /**
  90          * The widget's constructor.
  91          */
  92         public FileUploadGearsDialog() {
  93                 // Set the dialog's caption.
  94                 setText("File upload");
  95                 setAnimationEnabled(true);
  96                 // Create a panel to hold all of the dialog widgets.
  97                 VerticalPanel panel = new VerticalPanel();
  98                 final HTML info = new HTML("You may select one or more files to upload.");
  99                 info.addStyleName("gss-uploadNote");
 100                 panel.add(info);
 101                 // Add an informative label with the folder name.
 102                 Object selection = GSS.get().getFolders().getCurrent().getUserObject();
 103                 folder = (FolderResource) selection;
 104
 105                 browse = new Button("Browse...");
 106
 107                 HorizontalPanel fileUploadPanel = new HorizontalPanel();
 108                 fileUploadPanel.add(browse);
 109
 110                 generalTable = new FlexTable();
 111                 generalTable.setText(0, 0, "Folder");
 112                 generalTable.setText(1, 0, "File");
 113                 generalTable.setText(0, 1, folder.getName());
 114                 generalTable.setWidget(1, 1, fileUploadPanel);
 115                 generalTable.getCellFormatter().setStyleName(0, 0, "props-labels");
 116                 generalTable.getCellFormatter().setStyleName(1, 0, "props-labels");
 117                 generalTable.getCellFormatter().setStyleName(0, 1, "props-values");
 118                 generalTable.getCellFormatter().setStyleName(1, 1, "props-values");
 119                 generalTable.setCellSpacing(4);
 120
 121                 panel.add(generalTable);
 122
 123                 // Create a panel to hold the buttons.
 124                 HorizontalPanel buttons = new HorizontalPanel();
 125
 126                 submit = new Button("Upload");
 127                 submit.addClickHandler(new ClickHandler() {
 128                         @Override
 129                         public void onClick(ClickEvent event) {
 130                                 prepareAndSubmit();
 131                         }
 132                 });
 133                 submit.setEnabled(false);
 134                 buttons.add(submit);
 135                 buttons.setCellHorizontalAlignment(submit, HasHorizontalAlignment.ALIGN_CENTER);
 136                 // Create the 'Cancel' button, along with a listener that hides the
 137                 // dialog when the button is clicked.
 138                 Button cancel = new Button("Cancel", new ClickHandler() {
 139                         @Override
 140                         public void onClick(ClickEvent event) {
 141                                 cancelUpload();
 142                         }
 143                 });
 144                 buttons.add(cancel);
 145                 buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);
 146                 buttons.setSpacing(8);
 147                 buttons.addStyleName("gss-DialogBox");
 148
 149                 browse.addClickHandler(new ClickHandler() {
 150                         @Override
 151                         public void onClick(ClickEvent event) {
 152                                 Desktop desktop = factory.createDesktop();
 153                                 desktop.openFiles(new OpenFilesHandler() {
 154
 155                                         @Override
 156                                         public void onOpenFiles(OpenFilesEvent ofevent) {
 157                                                 fileObjects = ofevent.getFiles();
 158                                                 selectedFiles.addAll(Arrays.asList(fileObjects));
 159                                                 for (int i = 0; i< selectedFiles.size(); i++) {
 160                                                         generalTable.setText(i+1, 0, "File");
 161                                                         generalTable.setText(i+1, 1, selectedFiles.get(i).getName());
 162                                                         ProgressBar progress = new ProgressBar(20, 0);
 163                                                         generalTable.setWidget(i+1, 2, progress);
 164                                                         progressBars.add(progress);
 165                                                         generalTable.getCellFormatter().setStyleName(i+1, 0, "props-labels");
 166                                                         generalTable.getCellFormatter().setStyleName(i+1, 1, "props-values");
 167                                                 }
 168                                                 submit.setEnabled(true);
 169                                         }
 170                                 });
 171                         }
 172                 });
 173
 174                 panel.add(buttons);
 175                 panel.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER);
 176                 panel.addStyleName("gss-DialogBox");
 177                 addStyleName("gss-DialogBox");
 178                 setWidget(panel);
 179         }
 180
 181         /**
 182          * Cancels the file upload.
 183          */
 184         private void cancelUpload() {
 185                 for (HttpRequest request: requests)
 186                         request.abort();
 187                 hide();
 188         }
 189
 190         /**
 191          * Check whether the specified file name exists in the selected folder.
 192          */
 193         private boolean canContinue(File file) {
 194                 String fileName = getFilename(file.getName());
 195                 if (getFileForName(fileName) == null)
 196                         // For file creation, check to see if the file already exists.
 197                         for (FileResource fileRes : files)
 198                                 if (!fileRes.isDeleted() && fileRes.getName().equals(fileName))
 199                                         return false;
 200                 return true;
 201         }
 202
 203         @Override
 204         public void prepareAndSubmit() {
 205                 GSS app = GSS.get();
 206                 if (selectedFiles.size() == 0) {
 207                         app.displayError("You must select a file!");
 208                         hide();
 209                         return;
 210                 }
 211                 for (File file: selectedFiles)
 212                         if (!canContinue(file)) {
 213                                 app.displayError("The file name " + file.getName() +
 214                                                         " already exists in this folder");
 215                                 hide();
 216                                 return;
 217                         }
 218                 submit.setEnabled(false);
 219                 browse.setVisible(false);
 220                 List<String> toUpdate = new ArrayList<String>();
 221                 toRename = new HashMap<String, FileResource>();
 222                 for (File file: selectedFiles) {
 223                         String fname = getFilename(file.getName());
 224                         if (getFileForName(fname) == null) {
 225                                 // We are going to create a file, so we check to see if there is a
 226                                 // trashed file with the same name.
 227                                 FileResource same = null;
 228                                 for (FileResource fres : folder.getFiles())
 229                                         if (fres.isDeleted() && fres.getName().equals(fname))
 230                                                 same = fres;
 231                                 // In that case add it to the list of files to rename.
 232                                 if (same != null)
 233                                         toRename.put(getBackupFilename(fname), same);
 234                         } else
 235                                 // If we are updating a file add it to the list of files to update.
 236                                 toUpdate.add(fname);
 237                 }
 238
 239                 if (!toUpdate.isEmpty()) {
 240                         StringBuffer sb = new StringBuffer();
 241                         for (String name: toUpdate)
 242                                 sb.append(name).append("<br/>");
 243                         // We are going to update existing files, so show a confirmation dialog.
 244                         ConfirmationDialog confirm = new ConfirmationDialog("Are you sure " +
 245                                         "you want to update the following files?<br/><i>" + sb +
 246                                         "</i>", "Update") {
 247
 248                                 @Override
 249                                 public void cancel() {
 250                                         hide();
 251                                 }
 252
 253                                 @Override
 254                                 public void confirm() {
 255                                         confirmRename();
 256                                 }
 257
 258                         };
 259                         confirm.center();
 260                 } else
 261                         confirmRename();
 262         }
 263
 264         /**
 265          * Confirm the renames of synonymous files already in the trash.
 266          */
 267         private void confirmRename() {
 268                 if (!toRename.isEmpty()) {
 269                         StringBuffer sb = new StringBuffer();
 270                         for (FileResource file: toRename.values())
 271                                 sb.append(file.getName()).append("<br/>");
 272                         ConfirmationDialog confirm = new ConfirmationDialog("Files " +
 273                                         "with the following names already exist in the trash. If" +
 274                                         " you continue,<br/>the trashed files will be renamed " +
 275                                         "automatically for you:<br/><i>" + sb + "</i>", "Continue") {
 276
 277                                 @Override
 278                                 public void cancel() {
 279                                         hide();
 280                                 }
 281
 282                                 @Override
 283                                 public void confirm() {
 284                                         updateTrashedFiles();
 285                                 }
 286
 287                         };
 288                         confirm.center();
 289                 } else
 290                         uploadFiles();
 291         }
 292
 293         /**
 294          * Rename the conflicting trashed files with the supplied new names.
 295          */
 296         private void updateTrashedFiles() {
 297                 for (final String name: toRename.keySet()) {
 298                         JSONObject json = new JSONObject();
 299                         json.put("name", new JSONString(name));
 300                         PostCommand cf = new PostCommand(toRename.get(name).getUri() + "?update=", json.toString(), 200) {
 301
 302                                 @Override
 303                                 public void onComplete() {
 304                                         toRename.remove(name);
 305                                         uploadFiles();
 306                                 }
 307
 308                                 @Override
 309                                 public void onError(Throwable t) {
 310                                         GSS app = GSS.get();
 311                                         GWT.log("", t);
 312                                         if (t instanceof RestException) {
 313                                                 int statusCode = ((RestException) t).getHttpStatusCode();
 314                                                 if (statusCode == 405)
 315                                                         app.displayError("You don't have the necessary permissions");
 316                                                 else if (statusCode == 404)
 317                                                         app.displayError("User in permissions does not exist");
 318                                                 else if (statusCode == 409)
 319                                                         app.displayError("A file with the same name already exists");
 320                                                 else if (statusCode == 413)
 321                                                         app.displayError("Your quota has been exceeded");
 322                                                 else
 323                                                         app.displayError("Unable to modify file:" + ((RestException) t).getHttpStatusText());
 324                                         } else
 325                                                 app.displayError("System error modifying file:" + t.getMessage());
 326                                 }
 327
 328                         };
 329                         DeferredCommand.addCommand(cf);
 330                 }
 331         }
 332
 333         /**
 334          * Checks if the renaming step for already trashed files is complete and
 335          * starts file uploads.
 336          */
 337         private void uploadFiles() {
 338                 if (!toRename.isEmpty()) return;
 339                 for (int i = 0; i< fileObjects.length; i++) {
 340                         final int index = i;
 341                         DeferredCommand.addCommand(new Command() {
 342                                 @Override
 343                                 public void execute() {
 344                                         doSend(fileObjects[index], index);
 345                                 }
 346                         });
 347                 }
 348         }
 349
 350         /**
 351          * Perform the HTTP request to upload the specified file.
 352          */
 353         protected void doSend(final File file, final int index) {
 354                 final GSS app = GSS.get();
 355                 HttpRequest request = factory.createHttpRequest();
 356                 requests.add(request);
 357                 String method = "PUT";
 358
 359                 String path;
 360                 final String filename = getFilename(file.getName());
 361                 path = folder.getUri();
 362                 if (!path.endsWith("/"))
 363                         path = path + "/";
 364                 path = path + encode(filename);
 365
 366                 String token = app.getToken();
 367                 String resource = path.substring(app.getApiPath().length()-1, path.length());
 368                 String date = RestCommand.getDate();
 369                 String sig = RestCommand.calculateSig(method, date, resource, RestCommand.base64decode(token));
 370                 request.open(method, path);
 371                 request.setRequestHeader("X-GSS-Date", date);
 372                 request.setRequestHeader("Authorization", app.getCurrentUserResource().getUsername() + " " + sig);
 373                 request.setRequestHeader("Accept", "application/json; charset=utf-8");
 374                 request.setCallback(new RequestCallback() {
 375                         @Override
 376                         public void onResponseReceived(HttpRequest req) {
 377                                 int state = req.getReadyState();
 378                                 if (state != 4) return;
 379                                 switch(req.getStatus()) {
 380                                         case 201: // Created falls through to updated.
 381                                         case 204:
 382                                                 selectedFiles.remove(file);
 383                                                 finish();
 384                                                 break;
 385                                         case 403:
 386                                                 SessionExpiredDialog dlg = new SessionExpiredDialog();
 387                                                 dlg.center();
 388                                                 break;
 389                                         case 405:
 390                                                 app.displayError("You don't have permission to " +
 391                                                                 "upload file " + filename);
 392                                                 break;
 393                                         case 409:
 394                                                 app.displayError("A folder with the name " + filename +
 395                                                                 " already exists at this level");
 396                                                 break;
 397                                         case 413:
 398                                                 app.displayError("There is not enough free space " +
 399                                                                 "available for uploading " + filename);
 400                                                 break;
 401                                         default:
 402                                                 app.displayError("Error uploading file " + filename +
 403                                                                         ": " + req.getStatus());
 404                                 }
 405                         }
 406                 });
 407                 request.getUpload().setProgressHandler(new ProgressHandler() {
 408                         @Override
 409                         public void onProgress(ProgressEvent event) {
 410                                 double pcnt = (double) event.getLoaded() / event.getTotal();
 411                                 progressBars.get(index).setProgress((int) Math.floor(pcnt * 100));
 412                         }
 413                 });
 414                 request.send(file.getBlob());
 415         }
 416
 417         /**
 418          * Perform the final actions after the files are uploaded.
 419          */
 420         protected void finish() {
 421                 if (!selectedFiles.isEmpty()) return;
 422                 hide();
 423                 GSS.get().showFileList(true);
 424                 GSS.get().getStatusPanel().updateStats();
 425         }
 426
 427         /**
 428          * Same as URL.encode, but also encode apostrophe since browsers aren't
 429          * consistent about it (FF encodes, IE does not).
 430          */
 431         protected String encode(String decodedURL) {
 432                 String retv = decodedURL.replaceAll("@", "_"); // Replace bad character
 433                 retv = URL.encodeComponent(retv);
 434                 retv = retv.replaceAll("'", "%27");
 435                 return retv;
 436         }
 437
 438 }