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.DeferredCommand;
  48 import com.google.gwt.user.client.ui.Button;
  49 import com.google.gwt.user.client.ui.FlexTable;
  50 import com.google.gwt.user.client.ui.HTML;
  51 import com.google.gwt.user.client.ui.HasHorizontalAlignment;
  52 import com.google.gwt.user.client.ui.HorizontalPanel;
  53 import com.google.gwt.user.client.ui.VerticalPanel;
  54
  55 /**
  56  * The 'File upload' dialog box implementation with Google Gears support.
  57  */
  58 public class FileUploadGearsDialog extends FileUploadDialog implements Updateable {
  59
  60         protected final Factory factory = Factory.getInstance();
  61
  62         /**
  63          * The array of files to upload.
  64          */
  65         private File[] fileObjects;
  66
  67         /**
  68          * A list of files to upload, created from files array. Used to signal
  69          * finished state when empty.
  70          */
  71         protected List<File> selectedFiles = new ArrayList<File>();
  72
  73         /**
  74          * The list of progress bars for individual files.
  75          */
  76         protected List<ProgressBar> progressBars = new ArrayList<ProgressBar>();
  77
  78         private Button browse;
  79
  80         private Button submit;
  81
  82         private FlexTable generalTable;
  83
  84         private Map<String, FileResource> toRename;
  85
  86         protected List<HttpRequest> requests = new ArrayList<HttpRequest>();
  87
  88         private boolean canContinue = true;
  89
  90         /**
  91          * The widget's constructor.
  92          */
  93         public FileUploadGearsDialog() {
  94                 // Set the dialog's caption.
  95                 setText("File upload");
  96                 setAnimationEnabled(true);
  97                 // Create a panel to hold all of the dialog widgets.
  98                 VerticalPanel panel = new VerticalPanel();
  99                 final HTML info = new HTML("You may select one or more files to upload.");
 100                 info.addStyleName("gss-uploadNote");
 101                 panel.add(info);
 102                 // Add an informative label with the folder name.
 103                 Object selection = GSS.get().getFolders().getCurrent().getUserObject();
 104                 folder = (FolderResource) selection;
 105
 106                 browse = new Button("Browse...");
 107
 108                 HorizontalPanel fileUploadPanel = new HorizontalPanel();
 109                 fileUploadPanel.add(browse);
 110
 111                 generalTable = new FlexTable();
 112                 generalTable.setText(0, 0, "Folder");
 113                 generalTable.setText(1, 0, "File");
 114                 generalTable.setText(0, 1, folder.getName());
 115                 generalTable.setWidget(1, 1, fileUploadPanel);
 116                 generalTable.getCellFormatter().setStyleName(0, 0, "props-labels");
 117                 generalTable.getCellFormatter().setStyleName(1, 0, "props-labels");
 118                 generalTable.getCellFormatter().setStyleName(0, 1, "props-values");
 119                 generalTable.getCellFormatter().setStyleName(1, 1, "props-values");
 120                 generalTable.setCellSpacing(4);
 121
 122                 panel.add(generalTable);
 123
 124                 // Create a panel to hold the buttons.
 125                 HorizontalPanel buttons = new HorizontalPanel();
 126
 127                 submit = new Button("Upload");
 128                 submit.addClickHandler(new ClickHandler() {
 129                         @Override
 130                         public void onClick(ClickEvent event) {
 131                                 prepareAndSubmit();
 132                         }
 133                 });
 134                 submit.setEnabled(false);
 135                 buttons.add(submit);
 136                 buttons.setCellHorizontalAlignment(submit, HasHorizontalAlignment.ALIGN_CENTER);
 137                 // Create the 'Cancel' button, along with a listener that hides the
 138                 // dialog when the button is clicked.
 139                 Button cancel = new Button("Cancel", new ClickHandler() {
 140                         @Override
 141                         public void onClick(ClickEvent event) {
 142                                 canContinue = false;
 143                                 cancelUpload();
 144                         }
 145                 });
 146                 buttons.add(cancel);
 147                 buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);
 148                 buttons.setSpacing(8);
 149                 buttons.addStyleName("gss-DialogBox");
 150
 151                 browse.addClickHandler(new ClickHandler() {
 152                         @Override
 153                         public void onClick(ClickEvent event) {
 154                                 Desktop desktop = factory.createDesktop();
 155                                 desktop.openFiles(new OpenFilesHandler() {
 156
 157                                         @Override
 158                                         public void onOpenFiles(OpenFilesEvent ofevent) {
 159                                                 fileObjects = ofevent.getFiles();
 160                                                 selectedFiles.addAll(Arrays.asList(fileObjects));
 161                                                 for (int i = 0; i< selectedFiles.size(); i++) {
 162                                                         generalTable.setText(i+1, 0, "File");
 163                                                         generalTable.setText(i+1, 1, selectedFiles.get(i).getName());
 164                                                         ProgressBar progress = new ProgressBar(20, 0);
 165                                                         generalTable.setWidget(i+1, 2, progress);
 166                                                         progressBars.add(progress);
 167                                                         generalTable.getCellFormatter().setStyleName(i+1, 0, "props-labels");
 168                                                         generalTable.getCellFormatter().setStyleName(i+1, 1, "props-values");
 169                                                 }
 170                                                 submit.setEnabled(true);
 171                                         }
 172                                 });
 173                         }
 174                 });
 175
 176                 panel.add(buttons);
 177                 panel.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER);
 178                 panel.addStyleName("gss-DialogBox");
 179                 addStyleName("gss-DialogBox");
 180                 setWidget(panel);
 181         }
 182
 183         /**
 184          * Cancels the file upload.
 185          */
 186         private void cancelUpload() {
 187                 for (HttpRequest request: requests)
 188                         request.abort();
 189                 hide();
 190         }
 191
 192         /**
 193          * Check whether the specified file name exists in the selected folder.
 194          */
 195         private boolean canContinue(File file) {
 196                 String fileName = getFilename(file.getName());
 197                 if (getFileForName(fileName) == null)
 198                         // For file creation, check to see if the file already exists.
 199                         for (FileResource fileRes : files)
 200                                 if (!fileRes.isDeleted() && fileRes.getName().equals(fileName))
 201                                         return false;
 202                 return true;
 203         }
 204
 205         @Override
 206         public void prepareAndSubmit() {
 207                 GSS app = GSS.get();
 208                 if (selectedFiles.size() == 0) {
 209                         app.displayError("You must select a file!");
 210                         hide();
 211                         return;
 212                 }
 213                 for (File file: selectedFiles)
 214                         if (!canContinue(file)) {
 215                                 app.displayError("The file name " + file.getName() +
 216                                                         " already exists in this folder");
 217                                 hide();
 218                                 return;
 219                         }
 220                 submit.setEnabled(false);
 221                 browse.setVisible(false);
 222                 List<String> toUpdate = new ArrayList<String>();
 223                 toRename = new HashMap<String, FileResource>();
 224                 for (File file: selectedFiles) {
 225                         String fname = getFilename(file.getName());
 226                         if (getFileForName(fname) == null) {
 227                                 // We are going to create a file, so we check to see if there is a
 228                                 // trashed file with the same name.
 229                                 FileResource same = null;
 230                                 for (FileResource fres : folder.getFiles())
 231                                         if (fres.isDeleted() && fres.getName().equals(fname))
 232                                                 same = fres;
 233                                 // In that case add it to the list of files to rename.
 234                                 if (same != null)
 235                                         toRename.put(getBackupFilename(fname), same);
 236                         } else
 237                                 // If we are updating a file add it to the list of files to update.
 238                                 toUpdate.add(fname);
 239                 }
 240
 241                 if (!toUpdate.isEmpty()) {
 242                         StringBuffer sb = new StringBuffer();
 243                         for (String name: toUpdate)
 244                                 sb.append(name).append("<br/>");
 245                         // We are going to update existing files, so show a confirmation dialog.
 246                         ConfirmationDialog confirm = new ConfirmationDialog("Are you sure " +
 247                                         "you want to update the following files?<br/><i>" + sb +
 248                                         "</i>", "Update") {
 249
 250                                 @Override
 251                                 public void cancel() {
 252                                         hide();
 253                                 }
 254
 255                                 @Override
 256                                 public void confirm() {
 257                                         confirmRename();
 258                                 }
 259
 260                         };
 261                         confirm.center();
 262                 } else
 263                         confirmRename();
 264         }
 265
 266         /**
 267          * Confirm the renames of synonymous files already in the trash.
 268          */
 269         private void confirmRename() {
 270                 if (!toRename.isEmpty()) {
 271                         StringBuffer sb = new StringBuffer();
 272                         for (FileResource file: toRename.values())
 273                                 sb.append(file.getName()).append("<br/>");
 274                         ConfirmationDialog confirm = new ConfirmationDialog("Files " +
 275                                         "with the following names already exist in the trash. If" +
 276                                         " you continue,<br/>the trashed files will be renamed " +
 277                                         "automatically for you:<br/><i>" + sb + "</i>", "Continue") {
 278
 279                                 @Override
 280                                 public void cancel() {
 281                                         hide();
 282                                 }
 283
 284                                 @Override
 285                                 public void confirm() {
 286                                         updateTrashedFiles();
 287                                 }
 288
 289                         };
 290                         confirm.center();
 291                 } else
 292                         uploadFiles();
 293         }
 294
 295         /**
 296          * Rename the conflicting trashed files with the supplied new names.
 297          */
 298         private void updateTrashedFiles() {
 299                 for (final String name: toRename.keySet()) {
 300                         JSONObject json = new JSONObject();
 301                         json.put("name", new JSONString(name));
 302                         PostCommand cf = new PostCommand(toRename.get(name).getUri() + "?update=", json.toString(), 200) {
 303
 304                                 @Override
 305                                 public void onComplete() {
 306                                         toRename.remove(name);
 307                                         uploadFiles();
 308                                 }
 309
 310                                 @Override
 311                                 public void onError(Throwable t) {
 312                                         GSS app = GSS.get();
 313                                         GWT.log("", t);
 314                                         if (t instanceof RestException) {
 315                                                 int statusCode = ((RestException) t).getHttpStatusCode();
 316                                                 if (statusCode == 405)
 317                                                         app.displayError("You don't have the necessary permissions");
 318                                                 else if (statusCode == 404)
 319                                                         app.displayError("User in permissions does not exist");
 320                                                 else if (statusCode == 409)
 321                                                         app.displayError("A file with the same name already exists");
 322                                                 else if (statusCode == 413)
 323                                                         app.displayError("Your quota has been exceeded");
 324                                                 else
 325                                                         app.displayError("Unable to modify file:" + ((RestException) t).getHttpStatusText());
 326                                         } else
 327                                                 app.displayError("System error modifying file:" + t.getMessage());
 328                                 }
 329
 330                         };
 331                         DeferredCommand.addCommand(cf);
 332                 }
 333         }
 334
 335         /**
 336          * Checks if the renaming step for already trashed files is complete and
 337          * starts file uploads.
 338          */
 339         private void uploadFiles() {
 340                 if (!toRename.isEmpty()) return;
 341                 if (canContinue){
 342                         doSend(selectedFiles);
 343                 }
 344         }
 345
 346         /**
 347          * Perform the HTTP request to upload the specified file.
 348          */
 349         protected void doSend(final List<File> filesRemaining) {
 350                 final GSS app = GSS.get();
 351                 HttpRequest request = factory.createHttpRequest();
 352                 requests.add(request);
 353                 String method = "PUT";
 354
 355                 String path;
 356                 final String filename = getFilename(filesRemaining.get(0).getName());
 357                 path = folder.getUri();
 358                 if (!path.endsWith("/"))
 359                         path = path + "/";
 360                 path = path + encode(filename);
 361
 362                 String token = app.getToken();
 363                 String resource = path.substring(app.getApiPath().length()-1, path.length());
 364                 String date = RestCommand.getDate();
 365                 String sig = RestCommand.calculateSig(method, date, resource, RestCommand.base64decode(token));
 366                 request.open(method, path);
 367                 request.setRequestHeader("X-GSS-Date", date);
 368                 request.setRequestHeader("Authorization", app.getCurrentUserResource().getUsername() + " " + sig);
 369                 request.setRequestHeader("Accept", "application/json; charset=utf-8");
 370                 request.setCallback(new RequestCallback() {
 371                         @Override
 372                         public void onResponseReceived(HttpRequest req) {
 373                                 int state = req.getReadyState();
 374                                 if (state != 4) return;
 375                                 switch(req.getStatus()) {
 376                                         case 201: // Created falls through to updated.
 377                                         case 204:
 378                                                 filesRemaining.remove(0);
 379                                                 if(filesRemaining.isEmpty()){
 380                                                         selectedFiles = filesRemaining;
 381                                                         finish();
 382                                                         break;
 383                                                 }
 384                                                 selectedFiles = filesRemaining;
 385                                                 doSend(filesRemaining);
 386                                                 break;
 387                                         case 403:
 388                                                 SessionExpiredDialog dlg = new SessionExpiredDialog();
 389                                                 dlg.center();
 390                                                 break;
 391                                         case 405:
 392                                                 app.displayError("You don't have permission to " +
 393                                                                 "upload file " + filename);
 394                                                 break;
 395                                         case 409:
 396                                                 app.displayError("A folder with the name " + filename +
 397                                                                 " already exists at this level");
 398                                                 break;
 399                                         case 413:
 400                                                 app.displayError("There is not enough free space " +
 401                                                                 "available for uploading " + filename);
 402                                                 break;
 403                                         default:
 404                                                 app.displayError("Error uploading file " + filename +
 405                                                                         ": " + req.getStatus());
 406                                 }
 407                         }
 408                 });
 409                 request.getUpload().setProgressHandler(new ProgressHandler() {
 410                         @Override
 411                         public void onProgress(ProgressEvent event) {
 412                                 double pcnt = (double) event.getLoaded() / event.getTotal();
 413                                 progressBars.get(0).setProgress((int) Math.floor(pcnt * 100));
 414                                 if(pcnt*100 == 100)
 415                                         progressBars.remove(0);
 416                         }
 417                 });
 418                 request.send(filesRemaining.get(0).getBlob());
 419         }
 420
 421         /**
 422          * Perform the final actions after the files are uploaded.
 423          */
 424         protected void finish() {
 425                 if (!selectedFiles.isEmpty()) return;
 426                 hide();
 427                 GSS.get().showFileList(true);
 428                 GSS.get().getStatusPanel().updateStats();
 429         }
 430
 431         /**
 432          * Same as URL.encode, but also encode apostrophe since browsers aren't
 433          * consistent about it (FF encodes, IE does not).
 434          */
 435         protected String encode(String decodedURL) {
 436                 String retv = decodedURL.replaceAll("@", "_"); // Replace bad character
 437                 retv = URL.encodeComponent(retv);
 438                 retv = retv.replaceAll("'", "%27");
 439                 return retv;
 440         }
 441
 442 }