root / src / gr / ebs / gss / client / FileUploadGearsDialog.java @ 9fd42cf4
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/*
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* Copyright 2009 Electronic Business Systems Ltd.
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*
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* This file is part of GSS.
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*
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* GSS is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GSS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GSS. If not, see <http://www.gnu.org/licenses/>.
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*/
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package gr.ebs.gss.client; |
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import gr.ebs.gss.client.rest.PostCommand; |
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import gr.ebs.gss.client.rest.RestCommand; |
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import gr.ebs.gss.client.rest.RestException; |
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import gr.ebs.gss.client.rest.resource.FileResource; |
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import gr.ebs.gss.client.rest.resource.FolderResource; |
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import java.util.ArrayList; |
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import java.util.Arrays; |
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import java.util.HashMap; |
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import java.util.List; |
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import java.util.Map; |
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import com.google.gwt.core.client.GWT; |
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import com.google.gwt.gears.client.Factory; |
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import com.google.gwt.gears.client.desktop.Desktop; |
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import com.google.gwt.gears.client.desktop.File; |
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import com.google.gwt.gears.client.desktop.OpenFilesHandler; |
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import com.google.gwt.gears.client.httprequest.HttpRequest; |
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import com.google.gwt.gears.client.httprequest.ProgressEvent; |
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import com.google.gwt.gears.client.httprequest.ProgressHandler; |
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import com.google.gwt.gears.client.httprequest.RequestCallback; |
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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.Command; |
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import com.google.gwt.user.client.DeferredCommand; |
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import com.google.gwt.user.client.ui.Button; |
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import com.google.gwt.user.client.ui.ClickListener; |
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import com.google.gwt.user.client.ui.FlexTable; |
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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.HorizontalPanel; |
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import com.google.gwt.user.client.ui.VerticalPanel; |
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import com.google.gwt.user.client.ui.Widget; |
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/**
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* The 'File upload' dialog box implementation with Google Gears support.
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*/
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public class FileUploadGearsDialog extends FileUploadDialog implements Updateable { |
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protected final Factory factory = Factory.getInstance(); |
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/**
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* The array of files to upload.
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*/
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private File[] fileObjects; |
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/**
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* A list of files to upload, created from files array. Used to signal
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* finished state when empty.
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*/
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protected List<File> selectedFiles = new ArrayList<File>(); |
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/**
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* The list of progress bars for individual files.
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*/
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protected List<ProgressBar> progressBars = new ArrayList<ProgressBar>(); |
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private Button browse; |
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private Button submit; |
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private FlexTable generalTable;
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private Map<String, FileResource> toRename; |
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protected List<HttpRequest> requests = new ArrayList<HttpRequest>(); |
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/**
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* The widget's constructor.
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*/
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public FileUploadGearsDialog() {
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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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// Create a panel to hold all of the dialog widgets.
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VerticalPanel panel = new VerticalPanel();
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final HTML info = new HTML("You may select one or more files to upload."); |
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info.addStyleName("gss-uploadNote");
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panel.add(info); |
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// Add an informative label with the folder name.
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Object selection = GSS.get().getFolders().getCurrent().getUserObject();
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folder = (FolderResource) selection; |
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browse = new Button("Browse..."); |
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HorizontalPanel fileUploadPanel = new HorizontalPanel();
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fileUploadPanel.add(browse); |
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generalTable = new FlexTable();
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generalTable.setText(0, 0, "Folder"); |
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generalTable.setText(1, 0, "File"); |
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generalTable.setText(0, 1, folder.getName()); |
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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(1, 0, "props-labels"); |
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generalTable.getCellFormatter().setStyleName(0, 1, "props-values"); |
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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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submit = new Button("Upload"); |
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submit.addClickListener(new ClickListener() {
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public void onClick(Widget sender) { |
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prepareAndSubmit(); |
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} |
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}); |
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submit.setEnabled(false);
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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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Button cancel = new Button("Cancel", new ClickListener() { |
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public void onClick(Widget sender) { |
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cancelUpload(); |
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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("gss-DialogBox");
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browse.addClickListener(new ClickListener() {
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public void onClick(Widget sender) { |
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Desktop desktop = factory.createDesktop(); |
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desktop.openFiles(new OpenFilesHandler() {
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public void onOpenFiles(OpenFilesEvent event) { |
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fileObjects = event.getFiles(); |
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selectedFiles.addAll(Arrays.asList(fileObjects));
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for (int i = 0; i< selectedFiles.size(); i++) { |
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generalTable.setText(i+1, 0, "File"); |
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generalTable.setText(i+1, 1, selectedFiles.get(i).getName()); |
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ProgressBar progress = new ProgressBar(20, 0); |
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generalTable.setWidget(i+1, 2, progress); |
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progressBars.add(progress); |
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generalTable.getCellFormatter().setStyleName(i+1, 0, "props-labels"); |
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generalTable.getCellFormatter().setStyleName(i+1, 1, "props-values"); |
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} |
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submit.setEnabled(true);
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} |
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}); |
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} |
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}); |
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panel.add(buttons); |
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panel.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER); |
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panel.addStyleName("gss-DialogBox");
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addStyleName("gss-DialogBox");
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setWidget(panel); |
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} |
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/**
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* Cancels the file upload.
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*/
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private void cancelUpload() { |
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for (HttpRequest request: requests)
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request.abort(); |
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hide(); |
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} |
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/**
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* Check whether the specified file name exists in the selected folder.
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*/
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private boolean canContinue(File file) { |
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String fileName = getFilename(file.getName());
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if (getFileForName(fileName) == null) |
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// For file creation, check to see if the file already exists.
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for (FileResource fileRes : files)
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if (!fileRes.isDeleted() && fileRes.getName().equals(fileName))
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return false; |
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return true; |
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} |
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@Override
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public void prepareAndSubmit() { |
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GSS app = GSS.get(); |
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if (selectedFiles.size() == 0) { |
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app.displayError("You must select a file!");
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hide(); |
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return;
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} |
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for (File file: selectedFiles) |
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if (!canContinue(file)) {
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app.displayError("The file name " + file.getName() +
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" already exists in this folder");
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hide(); |
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return;
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} |
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submit.setEnabled(false);
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browse.setVisible(false);
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List<String> toUpdate = new ArrayList<String>(); |
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toRename = new HashMap<String, FileResource>(); |
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for (File file: selectedFiles) { |
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String fname = getFilename(file.getName());
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if (getFileForName(fname) == null) { |
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// We are going to create a file, so we check to see if there is a
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// trashed file with the same name.
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FileResource same = null;
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for (FileResource fres : folder.getFiles())
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if (fres.isDeleted() && fres.getName().equals(fname))
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same = fres; |
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// In that case add it to the list of files to rename.
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if (same != null) |
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toRename.put(getBackupFilename(fname), same); |
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} else
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// If we are updating a file add it to the list of files to update.
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toUpdate.add(fname); |
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} |
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if (!toUpdate.isEmpty()) {
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StringBuffer sb = new StringBuffer(); |
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for (String name: toUpdate) |
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sb.append(name).append("<br/>");
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// We are going to update existing files, so show a confirmation dialog.
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ConfirmationDialog confirm = new ConfirmationDialog("Are you sure " + |
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"you want to update the following files?<br/><i>" + sb +
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"</i>", "Update") { |
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@Override
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public void cancel() { |
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hide(); |
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} |
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@Override
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public void confirm() { |
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confirmRename(); |
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} |
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}; |
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confirm.center(); |
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} else
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confirmRename(); |
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} |
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/**
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* Confirm the renames of synonymous files already in the trash.
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*/
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private void confirmRename() { |
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if (!toRename.isEmpty()) {
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StringBuffer sb = new StringBuffer(); |
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for (FileResource file: toRename.values())
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sb.append(file.getName()).append("<br/>");
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ConfirmationDialog confirm = new ConfirmationDialog("Files " + |
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"with the following names already exist in the trash. If" +
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" you continue,<br/>the trashed files will be renamed " +
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"automatically for you:<br/><i>" + sb + "</i>", "Continue") { |
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@Override
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public void cancel() { |
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hide(); |
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} |
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@Override
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public void confirm() { |
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updateTrashedFiles(); |
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} |
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}; |
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confirm.center(); |
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} else
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uploadFiles(); |
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} |
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/**
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* Rename the conflicting trashed files with the supplied new names.
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*/
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private void updateTrashedFiles() { |
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for (final String name: toRename.keySet()) { |
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JSONObject json = new JSONObject();
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json.put("name", new JSONString(name)); |
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PostCommand cf = new PostCommand(toRename.get(name).getUri() + "?update=", json.toString(), 200) { |
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@Override
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public void onComplete() { |
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toRename.remove(name); |
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uploadFiles(); |
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} |
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@Override
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public void onError(Throwable t) { |
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GSS app = GSS.get(); |
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GWT.log("", t);
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if (t instanceof RestException) { |
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int statusCode = ((RestException) t).getHttpStatusCode();
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if (statusCode == 405) |
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app.displayError("You don't have the necessary permissions");
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else if (statusCode == 404) |
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app.displayError("User in permissions does not exist");
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else if (statusCode == 409) |
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app.displayError("A file with the same name already exists");
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else if (statusCode == 413) |
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app.displayError("Your quota has been exceeded");
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else
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app.displayError("Unable to modify file:" + ((RestException) t).getHttpStatusText());
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} else
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app.displayError("System error modifying file:" + t.getMessage());
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} |
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}; |
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DeferredCommand.addCommand(cf); |
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} |
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} |
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/**
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* Checks if the renaming step for already trashed files is complete and
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* starts file uploads.
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*/
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private void uploadFiles() { |
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if (!toRename.isEmpty()) return; |
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for (int i = 0; i< fileObjects.length; i++) { |
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final int index = i; |
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DeferredCommand.addCommand(new Command() {
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public void execute() { |
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doSend(fileObjects[index], index); |
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} |
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}); |
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} |
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} |
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/**
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* Perform the HTTP request to upload the specified file.
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*/
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protected void doSend(final File file, final int index) { |
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final GSS app = GSS.get();
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HttpRequest request = factory.createHttpRequest(); |
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requests.add(request); |
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String method = "PUT"; |
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String path;
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final String filename = getFilename(file.getName()); |
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path = folder.getUri(); |
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if (!path.endsWith("/")) |
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path = path + "/";
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path = path + encode(filename); |
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String token = app.getToken();
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String resource = path.substring(app.getApiPath().length()-1, path.length()); |
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String date = RestCommand.getDate();
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String sig = RestCommand.calculateSig(method, date, resource, RestCommand.base64decode(token));
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request.open(method, path); |
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request.setRequestHeader("X-GSS-Date", date);
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request.setRequestHeader("Authorization", app.getCurrentUserResource().getUsername() + " " + sig); |
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request.setRequestHeader("Accept", "application/json; charset=utf-8"); |
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request.setCallback(new RequestCallback() {
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public void onResponseReceived(HttpRequest req) { |
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int state = req.getReadyState();
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if (state != 4) return; |
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switch(req.getStatus()) {
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case 201: // Created falls through to updated. |
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case 204: |
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selectedFiles.remove(file); |
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finish(); |
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break;
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case 403: |
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SessionExpiredDialog dlg = new SessionExpiredDialog();
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dlg.center(); |
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break;
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case 405: |
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app.displayError("You don't have permission to " +
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"upload file " + filename);
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break;
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case 409: |
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app.displayError("A folder with the name " + filename +
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" already exists at this level");
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break;
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case 413: |
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app.displayError("There is not enough free space " +
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"available for uploading " + filename);
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break;
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default:
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app.displayError("Error uploading file " + filename +
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": " + req.getStatus());
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} |
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} |
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}); |
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request.getUpload().setProgressHandler(new ProgressHandler() {
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public void onProgress(ProgressEvent event) { |
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double pcnt = (double) event.getLoaded() / event.getTotal(); |
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progressBars.get(index).setProgress((int) Math.floor(pcnt * 100)); |
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} |
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}); |
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request.send(file.getBlob()); |
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} |
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/**
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* Perform the final actions after the files are uploaded.
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*/
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protected void finish() { |
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if (!selectedFiles.isEmpty()) return; |
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hide(); |
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GSS.get().showFileList(true);
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GSS.get().getStatusPanel().updateStats(); |
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} |
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/**
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* Same as URL.encode, but also encode apostrophe since browsers aren't
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* consistent about it (FF encodes, IE does not).
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*/
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protected String encode(String decodedURL) { |
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String retv = URL.encode(decodedURL); |
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retv = retv.replaceAll("'", "%27"); |
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return retv;
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} |
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} |