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

   1 /*
   2  * Copyright 2011 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 com.google.gwt.core.client.Scheduler;
  38 import com.google.gwt.http.client.Response;
  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.Resource;
  42 import gr.grnet.pithos.web.client.rest.GetCommand;
  43 import gr.grnet.pithos.web.client.rest.PostCommand;
  44 import gr.grnet.pithos.web.client.rest.PutRequest;
  45 import gr.grnet.pithos.web.client.rest.RestCommand;
  46 import gr.grnet.pithos.web.client.rest.RestException;
  47 import gr.grnet.pithos.web.client.rest.resource.FileResource;
  48 import gr.grnet.pithos.web.client.rest.resource.FolderResource;
  49 import gr.grnet.pithos.web.client.rest.resource.RestResourceWrapper;
  50 import gr.grnet.pithos.web.client.rest.resource.UploadStatusResource;
  51
  52 import java.util.ArrayList;
  53 import java.util.List;
  54
  55 import com.google.gwt.core.client.GWT;
  56 import com.google.gwt.dom.client.NativeEvent;
  57 import com.google.gwt.event.dom.client.ClickEvent;
  58 import com.google.gwt.event.dom.client.ClickHandler;
  59 import com.google.gwt.event.dom.client.KeyCodes;
  60 import com.google.gwt.http.client.URL;
  61 import com.google.gwt.json.client.JSONObject;
  62 import com.google.gwt.json.client.JSONString;
  63 import com.google.gwt.user.client.DeferredCommand;
  64 import com.google.gwt.user.client.Event.NativePreviewEvent;
  65 import com.google.gwt.user.client.Timer;
  66 import com.google.gwt.user.client.ui.Button;
  67 import com.google.gwt.user.client.ui.DialogBox;
  68 import com.google.gwt.user.client.ui.FileUpload;
  69 import com.google.gwt.user.client.ui.FormPanel;
  70 import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteEvent;
  71 import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteHandler;
  72 import com.google.gwt.user.client.ui.FormPanel.SubmitEvent;
  73 import com.google.gwt.user.client.ui.FormPanel.SubmitHandler;
  74 import com.google.gwt.user.client.ui.Grid;
  75 import com.google.gwt.user.client.ui.HTML;
  76 import com.google.gwt.user.client.ui.HasHorizontalAlignment;
  77 import com.google.gwt.user.client.ui.Hidden;
  78 import com.google.gwt.user.client.ui.HorizontalPanel;
  79 import com.google.gwt.user.client.ui.Label;
  80 import com.google.gwt.user.client.ui.VerticalPanel;
  81 import javax.xml.transform.Templates;
  82
  83 /**
  84  * The 'File upload' dialog box implementation.
  85  */
  86 public class FileUploadDialog extends DialogBox {
  87
  88     public static final boolean DONE = true;
  89
  90         /**
  91          * The Form element that performs the file upload.
  92          */
  93         private final FormPanel form = new FormPanel();
  94
  95         private final FileUpload upload = new FileUpload();
  96
  97         private final Label filenameLabel = new Label();
  98
  99     private final Label foldernameLabel = new Label();
 100
 101     private Button submit;
 102
 103         protected Folder folder;
 104
 105     protected GSS app;
 106
 107         /**
 108          * The widget's constructor.
 109          */
 110         public FileUploadDialog() {
 111                 // Set the dialog's caption.
 112                 setText("File upload");
 113                 setAnimationEnabled(true);
 114                 // Since we're going to add a FileUpload widget, we'll need to set the
 115                 // form to use the POST method, and multipart MIME encoding.
 116                 form.setEncoding(FormPanel.ENCODING_MULTIPART);
 117                 form.setMethod(FormPanel.METHOD_POST);
 118
 119                 // Create a panel to hold all of the form widgets.
 120                 VerticalPanel panel = new VerticalPanel();
 121                 form.setWidget(panel);
 122                 final HTML info = new HTML("You may select a file to upload. Install" +
 123                                 " <a href='http://gears.google.com/' target='_blank'>Google " +
 124                                 "Gears</a><br> for uploading multiple files simultaneously.");
 125                 info.addStyleName("pithos-uploadNote");
 126                 panel.add(info);
 127
 128         final Hidden auth = new Hidden("X-Auth-Token", "");
 129         panel.add(auth);
 130                 upload.setName("file");
 131                 filenameLabel.setText("");
 132                 filenameLabel.setVisible(false);
 133                 filenameLabel.setStyleName("props-labels");
 134                 HorizontalPanel fileUploadPanel = new HorizontalPanel();
 135                 fileUploadPanel.add(filenameLabel);
 136                 fileUploadPanel.add(upload);
 137                 Grid generalTable = new Grid(2, 2);
 138                 generalTable.setText(0, 0, "Folder");
 139         generalTable.setWidget(0, 1, foldernameLabel);
 140                 generalTable.setText(1, 0, "File");
 141                 generalTable.setWidget(1, 1, fileUploadPanel);
 142                 generalTable.getCellFormatter().setStyleName(0, 0, "props-labels");
 143         generalTable.getCellFormatter().setStyleName(0, 1, "props-values");
 144                 generalTable.getCellFormatter().setStyleName(1, 0, "props-labels");
 145                 generalTable.getCellFormatter().setStyleName(1, 1, "props-values");
 146                 generalTable.setCellSpacing(4);
 147
 148                 panel.add(generalTable);
 149
 150                 // Create a panel to hold the buttons.
 151                 HorizontalPanel buttons = new HorizontalPanel();
 152
 153                 // Create the 'upload' button, along with a listener that submits the
 154                 // form.
 155                 submit = new Button("Upload", new ClickHandler() {
 156                         @Override
 157                         public void onClick(ClickEvent event) {
 158                                 prepareAndSubmit();
 159                         }
 160                 });
 161                 buttons.add(submit);
 162                 buttons.setCellHorizontalAlignment(submit, HasHorizontalAlignment.ALIGN_CENTER);
 163                 // Create the 'Cancel' button, along with a listener that hides the
 164                 // dialog when the button is clicked.
 165                 final Button cancel = new Button("Cancel", new ClickHandler() {
 166                         @Override
 167                         public void onClick(ClickEvent event) {
 168                                 hide();
 169                         }
 170                 });
 171                 buttons.add(cancel);
 172                 buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);
 173                 buttons.setSpacing(8);
 174                 buttons.addStyleName("pithos-DialogBox");
 175         panel.add(buttons);
 176         panel.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER);
 177
 178                 // Add an event handler to the form.
 179                 form.addSubmitHandler(new SubmitHandler() {
 180
 181                         @Override
 182                         public void onSubmit(SubmitEvent event) {
 183                 auth.setValue(app.getToken()); //This is done here because the app object is not available in the constructor
 184                         }
 185                 });
 186                 form.addSubmitCompleteHandler(new SubmitCompleteHandler() {
 187
 188                         @Override
 189                         public void onSubmitComplete(SubmitCompleteEvent event) {
 190                                 // When the form submission is successfully completed, this
 191                                 // event is fired. Assuming the service returned a response
 192                                 // of type text/html, we can get the result text here (see
 193                                 // the FormPanel documentation for further explanation).
 194                                 String results = event.getResults();
 195
 196                                 // Unfortunately the results are never empty, even in
 197                                 // the absense of errors, so we have to check for '<pre></pre>'.
 198                                 if (results != null && !results.equalsIgnoreCase("<pre></pre>")) {
 199                                         GWT.log(results, null);
 200                                         app.displayError(results);
 201                                 }
 202                 app.updateFolder(folder);
 203                                 hide();
 204                         }
 205                 });
 206
 207
 208                 panel.addStyleName("pithos-DialogBox");
 209                 addStyleName("pithos-DialogBox");
 210                 setWidget(form);
 211         }
 212
 213         @Override
 214         protected void onPreviewNativeEvent(NativePreviewEvent preview) {
 215                 super.onPreviewNativeEvent(preview);
 216
 217                 NativeEvent evt = preview.getNativeEvent();
 218                 if (evt.getType().equals("keydown"))
 219                         // Use the popup's key preview hooks to close the dialog when either
 220                         // enter or escape is pressed.
 221                         switch (evt.getKeyCode()) {
 222                                 case KeyCodes.KEY_ENTER:
 223                                         prepareAndSubmit();
 224                                         break;
 225                                 case KeyCodes.KEY_ESCAPE:
 226                                         hide();
 227                                         break;
 228                         }
 229         }
 230
 231         /**
 232          * Make any last minute checks and start the upload.
 233          */
 234         protected void prepareAndSubmit() {
 235         if (upload.getFilename().length() == 0) {
 236             app.displayError("You must select a file!");
 237             return;
 238         }
 239         final String fname = getFilename(upload.getFilename());
 240         String apath = app.getApiPath() + app.getUsername() + folder.getUri() + "/" + fname;
 241         form.setAction(apath);
 242         submit.setEnabled(false);
 243         upload.setVisible(false);
 244         filenameLabel.setText(fname);
 245         filenameLabel.setVisible(true);
 246
 247                 if (getFileForName(fname) == null) {
 248                         doUpload(apath);
 249                 }
 250                 else {
 251                         // We are going to update an existing file, so show a confirmation dialog.
 252                         ConfirmationDialog confirm = new ConfirmationDialog("Are you sure " +
 253                                         "you want to update " + fname + "?", "Update") {
 254
 255                                 @Override
 256                                 public void cancel() {
 257                                         FileUploadDialog.this.hide();
 258                                 }
 259
 260                                 @Override
 261                                 public void confirm() {
 262                                         form.submit();
 263                                 }
 264
 265                         };
 266                         confirm.center();
 267                 }
 268         }
 269
 270     private void doUpload(String path) {
 271         PutRequest createFile = new PutRequest(path) {
 272             @Override
 273             public void onSuccess(Resource result) {
 274                 form.submit();
 275             }
 276
 277             @Override
 278             public void onError(Throwable t) {
 279                 GWT.log("", t);
 280                 if (t instanceof RestException) {
 281                     app.displayError("Unable to create file:" + ((RestException) t).getHttpStatusText());
 282                 }
 283                 else
 284                     app.displayError("System error creating file:" + t.getMessage());
 285             }
 286         };
 287         createFile.setHeader("X-Auth-Token", app.getToken());
 288         createFile.setHeader("Content-Length", "0");
 289         Scheduler.get().scheduleDeferred(createFile);
 290     }
 291
 292     /**
 293          * Returns the file name from a potential full path argument. Apparently IE
 294          * insists on sending the full path name of a file when uploading, forcing
 295          * us to trim the extra path info. Since this is only observed on Windows we
 296          * get to check for a single path separator value.
 297          *
 298          * @param name the potentially full path name of a file
 299          * @return the file name without extra path information
 300          */
 301         protected String getFilename(String name) {
 302                 int pathSepIndex = name.lastIndexOf("\\");
 303                 if (pathSepIndex == -1) {
 304                         pathSepIndex = name.lastIndexOf("/");
 305                         if (pathSepIndex == -1)
 306                                 return name;
 307                 }
 308                 return name.substring(pathSepIndex + 1);
 309         }
 310
 311         protected File getFileForName(String name){
 312                 for (File f : folder.getFiles())
 313                         if (!f.isInTrash() && f.getName().equals(name))
 314                                 return f;
 315                 return null;
 316         }
 317
 318     public void setApp(GSS app) {
 319         this.app = app;
 320     }
 321
 322     public void setFolder(Folder folder) {
 323         this.folder = folder;
 324         foldernameLabel.setText(folder.getName());
 325     }
 326 }