root / src / gr / grnet / pithos / web / client / FileUploadDialog.java @ bdda6b2f
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/*
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* Copyright 2011 GRNET S.A. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* The views and conclusions contained in the software and
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* documentation are those of the authors and should not be
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* interpreted as representing official policies, either expressed
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* or implied, of GRNET S.A.
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*/
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package gr.grnet.pithos.web.client; |
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import com.google.gwt.core.client.Scheduler; |
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import com.google.gwt.http.client.Response; |
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import gr.grnet.pithos.web.client.foldertree.File; |
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import gr.grnet.pithos.web.client.foldertree.Folder; |
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import gr.grnet.pithos.web.client.foldertree.Resource; |
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import gr.grnet.pithos.web.client.rest.GetCommand; |
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import gr.grnet.pithos.web.client.rest.PostCommand; |
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import gr.grnet.pithos.web.client.rest.PutRequest; |
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import gr.grnet.pithos.web.client.rest.RestCommand; |
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import gr.grnet.pithos.web.client.rest.RestException; |
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import gr.grnet.pithos.web.client.rest.resource.FileResource; |
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import gr.grnet.pithos.web.client.rest.resource.FolderResource; |
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import gr.grnet.pithos.web.client.rest.resource.RestResourceWrapper; |
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import gr.grnet.pithos.web.client.rest.resource.UploadStatusResource; |
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import java.util.ArrayList; |
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import java.util.List; |
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import com.google.gwt.core.client.GWT; |
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import com.google.gwt.dom.client.NativeEvent; |
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import com.google.gwt.event.dom.client.ClickEvent; |
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import com.google.gwt.event.dom.client.ClickHandler; |
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import com.google.gwt.event.dom.client.KeyCodes; |
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import com.google.gwt.http.client.URL; |
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import com.google.gwt.json.client.JSONObject; |
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import com.google.gwt.json.client.JSONString; |
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import com.google.gwt.user.client.DeferredCommand; |
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import com.google.gwt.user.client.Event.NativePreviewEvent; |
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import com.google.gwt.user.client.Timer; |
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import com.google.gwt.user.client.ui.Button; |
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import com.google.gwt.user.client.ui.DialogBox; |
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import com.google.gwt.user.client.ui.FileUpload; |
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import com.google.gwt.user.client.ui.FormPanel; |
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import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteEvent; |
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import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteHandler; |
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import com.google.gwt.user.client.ui.FormPanel.SubmitEvent; |
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import com.google.gwt.user.client.ui.FormPanel.SubmitHandler; |
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import com.google.gwt.user.client.ui.Grid; |
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import com.google.gwt.user.client.ui.HTML; |
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import com.google.gwt.user.client.ui.HasHorizontalAlignment; |
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import com.google.gwt.user.client.ui.Hidden; |
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import com.google.gwt.user.client.ui.HorizontalPanel; |
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import com.google.gwt.user.client.ui.Label; |
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import com.google.gwt.user.client.ui.VerticalPanel; |
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import javax.xml.transform.Templates; |
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/**
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* The 'File upload' dialog box implementation.
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*/
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public class FileUploadDialog extends DialogBox { |
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public static final boolean DONE = true; |
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/**
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* The Form element that performs the file upload.
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*/
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private final FormPanel form = new FormPanel(); |
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private final FileUpload upload = new FileUpload(); |
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private final Label filenameLabel = new Label(); |
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private final Label foldernameLabel = new Label(); |
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private Button submit; |
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protected Folder folder;
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protected GSS app;
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/**
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* The widget's constructor.
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*/
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public FileUploadDialog() {
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// Set the dialog's caption.
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setText("File upload");
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setAnimationEnabled(true);
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// Since we're going to add a FileUpload widget, we'll need to set the
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// form to use the POST method, and multipart MIME encoding.
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form.setEncoding(FormPanel.ENCODING_MULTIPART); |
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form.setMethod(FormPanel.METHOD_POST); |
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// Create a panel to hold all of the form widgets.
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VerticalPanel panel = new VerticalPanel();
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form.setWidget(panel); |
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final HTML info = new HTML("You may select a file to upload. Install" + |
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" <a href='http://gears.google.com/' target='_blank'>Google " +
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"Gears</a><br> for uploading multiple files simultaneously.");
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info.addStyleName("pithos-uploadNote");
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panel.add(info); |
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final Hidden auth = new Hidden("X-Auth-Token", ""); |
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panel.add(auth); |
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upload.setName("file");
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filenameLabel.setText("");
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filenameLabel.setVisible(false);
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filenameLabel.setStyleName("props-labels");
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HorizontalPanel fileUploadPanel = new HorizontalPanel();
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fileUploadPanel.add(filenameLabel); |
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fileUploadPanel.add(upload); |
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Grid generalTable = new Grid(2, 2); |
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generalTable.setText(0, 0, "Folder"); |
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generalTable.setWidget(0, 1, foldernameLabel); |
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generalTable.setText(1, 0, "File"); |
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generalTable.setWidget(1, 1, fileUploadPanel); |
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generalTable.getCellFormatter().setStyleName(0, 0, "props-labels"); |
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generalTable.getCellFormatter().setStyleName(0, 1, "props-values"); |
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generalTable.getCellFormatter().setStyleName(1, 0, "props-labels"); |
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generalTable.getCellFormatter().setStyleName(1, 1, "props-values"); |
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generalTable.setCellSpacing(4);
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panel.add(generalTable); |
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// Create a panel to hold the buttons.
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HorizontalPanel buttons = new HorizontalPanel();
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// Create the 'upload' button, along with a listener that submits the
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// form.
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submit = new Button("Upload", new ClickHandler() { |
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@Override
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public void onClick(ClickEvent event) { |
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prepareAndSubmit(); |
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} |
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}); |
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buttons.add(submit); |
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buttons.setCellHorizontalAlignment(submit, HasHorizontalAlignment.ALIGN_CENTER); |
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// Create the 'Cancel' button, along with a listener that hides the
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// dialog when the button is clicked.
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final Button cancel = new Button("Cancel", new ClickHandler() { |
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@Override
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public void onClick(ClickEvent event) { |
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hide(); |
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} |
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}); |
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buttons.add(cancel); |
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buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER); |
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buttons.setSpacing(8);
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buttons.addStyleName("pithos-DialogBox");
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panel.add(buttons); |
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panel.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER); |
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// Add an event handler to the form.
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form.addSubmitHandler(new SubmitHandler() {
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@Override
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public void onSubmit(SubmitEvent event) { |
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auth.setValue(app.getToken()); //This is done here because the app object is not available in the constructor
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} |
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}); |
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form.addSubmitCompleteHandler(new SubmitCompleteHandler() {
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@Override
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public void onSubmitComplete(SubmitCompleteEvent event) { |
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// When the form submission is successfully completed, this
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// event is fired. Assuming the service returned a response
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// of type text/html, we can get the result text here (see
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// the FormPanel documentation for further explanation).
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String results = event.getResults();
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// Unfortunately the results are never empty, even in
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// the absense of errors, so we have to check for '<pre></pre>'.
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if (results != null && !results.equalsIgnoreCase("<pre></pre>")) { |
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GWT.log(results, null);
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app.displayError(results); |
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} |
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app.updateFolder(folder); |
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hide(); |
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} |
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}); |
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panel.addStyleName("pithos-DialogBox");
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addStyleName("pithos-DialogBox");
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setWidget(form); |
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} |
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@Override
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protected void onPreviewNativeEvent(NativePreviewEvent preview) { |
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super.onPreviewNativeEvent(preview);
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NativeEvent evt = preview.getNativeEvent(); |
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if (evt.getType().equals("keydown")) |
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// Use the popup's key preview hooks to close the dialog when either
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// enter or escape is pressed.
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switch (evt.getKeyCode()) {
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case KeyCodes.KEY_ENTER:
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prepareAndSubmit(); |
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break;
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case KeyCodes.KEY_ESCAPE:
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hide(); |
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break;
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} |
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} |
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/**
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* Make any last minute checks and start the upload.
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*/
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protected void prepareAndSubmit() { |
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if (upload.getFilename().length() == 0) { |
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app.displayError("You must select a file!");
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return;
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} |
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final String fname = getFilename(upload.getFilename()); |
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String apath = app.getApiPath() + app.getUsername() + folder.getUri() + "/" + fname; |
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form.setAction(apath); |
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submit.setEnabled(false);
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upload.setVisible(false);
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filenameLabel.setText(fname); |
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filenameLabel.setVisible(true);
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if (getFileForName(fname) == null) { |
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doUpload(apath); |
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} |
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else {
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// We are going to update an existing file, so show a confirmation dialog.
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ConfirmationDialog confirm = new ConfirmationDialog("Are you sure " + |
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"you want to update " + fname + "?", "Update") { |
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@Override
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public void cancel() { |
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FileUploadDialog.this.hide(); |
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} |
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@Override
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public void confirm() { |
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form.submit(); |
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} |
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}; |
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confirm.center(); |
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} |
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} |
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private void doUpload(String path) { |
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PutRequest createFile = new PutRequest(path) {
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@Override
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public void onSuccess(Resource result) { |
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form.submit(); |
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} |
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@Override
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public void onError(Throwable t) { |
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GWT.log("", t);
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if (t instanceof RestException) { |
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app.displayError("Unable to create file:" + ((RestException) t).getHttpStatusText());
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} |
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else
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app.displayError("System error creating file:" + t.getMessage());
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} |
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}; |
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createFile.setHeader("X-Auth-Token", app.getToken());
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createFile.setHeader("Content-Length", "0"); |
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Scheduler.get().scheduleDeferred(createFile); |
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} |
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/**
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* Returns the file name from a potential full path argument. Apparently IE
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* insists on sending the full path name of a file when uploading, forcing
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* us to trim the extra path info. Since this is only observed on Windows we
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* get to check for a single path separator value.
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*
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* @param name the potentially full path name of a file
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* @return the file name without extra path information
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*/
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protected String getFilename(String name) { |
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int pathSepIndex = name.lastIndexOf("\\"); |
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if (pathSepIndex == -1) { |
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pathSepIndex = name.lastIndexOf("/");
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if (pathSepIndex == -1) |
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return name;
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} |
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return name.substring(pathSepIndex + 1); |
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} |
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protected File getFileForName(String name){ |
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for (File f : folder.getFiles()) |
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if (!f.isInTrash() && f.getName().equals(name))
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return f;
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return null; |
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} |
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public void setApp(GSS app) { |
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this.app = app;
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} |
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public void setFolder(Folder folder) { |
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this.folder = folder;
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foldernameLabel.setText(folder.getName()); |
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} |
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} |