Java tutorial
/* * jets3t : Java Extra-Tasty S3 Toolkit (for Amazon S3 online storage service) * This is a java.net project, see https://jets3t.dev.java.net/ * * Copyright 2006-2009 James Murty * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.eurocarbdb.application.glycoworkbench.plugin.s3.gui; import java.awt.Frame; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.Insets; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.Calendar; import javax.swing.AbstractAction; import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JComponent; import javax.swing.JDialog; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTextArea; import javax.swing.JTextField; import javax.swing.KeyStroke; import javax.swing.event.DocumentEvent; import javax.swing.event.DocumentListener; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.jets3t.gui.ErrorDialog; import org.jets3t.gui.HyperlinkActivatedListener; import org.jets3t.gui.JHtmlLabel; import org.jets3t.service.Constants; import org.jets3t.service.S3Service; import org.jets3t.service.S3ServiceException; import org.jets3t.service.model.S3Object; /** * Dialog box to query to generate Signed URLs for a given set of objects, based * on URL signing configuration options selected by the user. This dialog does * all the work, prompting for user inputs then generating and displaying the * resultant Signed URLs. * <p> * The caller is responsible for disposing of this dialog. * * @author James Murty * */ public class SignedGetUrlDialog extends JDialog implements ActionListener, DocumentListener { private static final long serialVersionUID = -3243824805519630114L; private static final Log log = LogFactory.getLog(SignedGetUrlDialog.class); private Frame ownerFrame = null; private HyperlinkActivatedListener hyperlinkListener = null; private S3Service s3Service = null; private S3Object[] objects = null; private JCheckBox virtualHostCheckBox = null; private JCheckBox requesterPaysCheckBox = null; private JCheckBox httpsUrlsCheckBox = null; private JTextField expiryTimeTextField = null; private JTextArea signedUrlsTextArea = null; private JButton finishedButton = null; private final Insets insetsDefault = new Insets(3, 5, 3, 5); public SignedGetUrlDialog(Frame ownerFrame, HyperlinkActivatedListener hyperlinkListener, S3Service s3Service, S3Object[] objects) { super(ownerFrame, "Generate Signed GET URLs", true); this.ownerFrame = ownerFrame; this.hyperlinkListener = hyperlinkListener; this.s3Service = s3Service; this.objects = objects; String introductionText = "<html><center>Generate signed GET URLs that you can provide to anyone<br>" + "who needs to access objects in your bucket for a limited time.</center></html>"; JHtmlLabel introductionLabel = new JHtmlLabel(introductionText, hyperlinkListener); introductionLabel.setHorizontalAlignment(JLabel.CENTER); JHtmlLabel expiryTimeLabel = new JHtmlLabel("<html><b>Expiry Time</b> (Hours)</html>", hyperlinkListener); expiryTimeLabel.setHorizontalAlignment(JLabel.RIGHT); JHtmlLabel httpsUrlsLabel = new JHtmlLabel("<html><b>Secure HTTPS URLs?</b></html>", hyperlinkListener); httpsUrlsLabel.setHorizontalAlignment(JLabel.RIGHT); JHtmlLabel virtualHostLabel = new JHtmlLabel("<html><b>Bucket is a Virtual Host?</b></html>", hyperlinkListener); virtualHostLabel.setHorizontalAlignment(JLabel.RIGHT); JHtmlLabel requesterPaysLabel = new JHtmlLabel("<html><b>Bucket is Requester Pays?</b></html>", hyperlinkListener); requesterPaysLabel.setHorizontalAlignment(JLabel.RIGHT); expiryTimeTextField = new JTextField("1.0"); expiryTimeTextField.setToolTipText("How long in hours until the URL will expire"); expiryTimeTextField.getDocument().addDocumentListener(this); httpsUrlsCheckBox = new JCheckBox(); httpsUrlsCheckBox.setSelected(false); httpsUrlsCheckBox.setToolTipText("Check this box to generate secure HTTPS URLs."); httpsUrlsCheckBox.addActionListener(this); virtualHostCheckBox = new JCheckBox(); virtualHostCheckBox.setSelected(false); virtualHostCheckBox.setToolTipText("Check this box if your bucket is configured as a virtual host."); virtualHostCheckBox.addActionListener(this); requesterPaysCheckBox = new JCheckBox(); requesterPaysCheckBox.setSelected(false); requesterPaysCheckBox.setToolTipText("Check this box if the bucket has Requester Pays enabled."); requesterPaysCheckBox.addActionListener(this); finishedButton = new JButton("Finished"); finishedButton.setActionCommand("Finished"); finishedButton.addActionListener(this); signedUrlsTextArea = new JTextArea(); signedUrlsTextArea.setEditable(false); // Set default ENTER and ESCAPE buttons. this.getRootPane().setDefaultButton(finishedButton); this.getRootPane().getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke("ESCAPE"), "ESCAPE"); this.getRootPane().getActionMap().put("ESCAPE", new AbstractAction() { private static final long serialVersionUID = -6225706489569112809L; public void actionPerformed(ActionEvent actionEvent) { setVisible(false); } }); JPanel panel = new JPanel(new GridBagLayout()); int row = 0; panel.add(introductionLabel, new GridBagConstraints(0, row, 6, 1, 0, 0, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL, insetsDefault, 0, 0)); panel.add(expiryTimeLabel, new GridBagConstraints(0, ++row, 1, 1, 0, 0, GridBagConstraints.EAST, GridBagConstraints.HORIZONTAL, insetsDefault, 0, 0)); panel.add(expiryTimeTextField, new GridBagConstraints(1, row, 5, 1, 1, 0, GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, insetsDefault, 0, 0)); panel.add(httpsUrlsLabel, new GridBagConstraints(0, ++row, 1, 1, 0.3, 0, GridBagConstraints.EAST, GridBagConstraints.HORIZONTAL, insetsDefault, 0, 0)); panel.add(httpsUrlsCheckBox, new GridBagConstraints(1, row, 1, 1, 0, 0, GridBagConstraints.WEST, GridBagConstraints.NONE, insetsDefault, 0, 0)); panel.add(virtualHostLabel, new GridBagConstraints(2, row, 1, 1, 0.3, 0, GridBagConstraints.EAST, GridBagConstraints.HORIZONTAL, insetsDefault, 0, 0)); panel.add(virtualHostCheckBox, new GridBagConstraints(3, row, 1, 1, 0, 0, GridBagConstraints.WEST, GridBagConstraints.NONE, insetsDefault, 0, 0)); panel.add(requesterPaysLabel, new GridBagConstraints(4, row, 1, 1, 0.3, 0, GridBagConstraints.EAST, GridBagConstraints.HORIZONTAL, insetsDefault, 0, 0)); panel.add(requesterPaysCheckBox, new GridBagConstraints(5, row, 1, 1, 0, 0, GridBagConstraints.WEST, GridBagConstraints.NONE, insetsDefault, 0, 0)); panel.add(new JScrollPane(signedUrlsTextArea), new GridBagConstraints(0, ++row, 6, 1, 1, 1, GridBagConstraints.CENTER, GridBagConstraints.BOTH, insetsDefault, 0, 0)); panel.add(finishedButton, new GridBagConstraints(0, ++row, 6, 1, 0, 0, GridBagConstraints.CENTER, GridBagConstraints.NONE, insetsDefault, 0, 0)); this.getContentPane().setLayout(new GridBagLayout()); this.getContentPane().add(panel, new GridBagConstraints(0, 0, 1, 1, 1, 1, GridBagConstraints.CENTER, GridBagConstraints.BOTH, insetsDefault, 0, 0)); this.setSize(700, 450); this.setResizable(true); this.setLocationRelativeTo(ownerFrame); generateSignedUrls(); } public void actionPerformed(ActionEvent event) { if (event.getSource().equals(finishedButton)) { this.setVisible(false); } else { generateSignedUrls(); } } public void changedUpdate(DocumentEvent e) { generateSignedUrls(); } public void insertUpdate(DocumentEvent e) { generateSignedUrls(); } public void removeUpdate(DocumentEvent e) { generateSignedUrls(); } protected void generateSignedUrls() { try { signedUrlsTextArea.setText(""); if (expiryTimeTextField.getText().length() == 0) { return; } // Determine expiry time for URL double hoursFromNow = Double.parseDouble(expiryTimeTextField.getText()); int secondsFromNow = (int) (hoursFromNow * 60 * 60); Calendar cal = Calendar.getInstance(); cal.add(Calendar.SECOND, secondsFromNow); long secondsSinceEpoch = cal.getTimeInMillis() / 1000; // Include Requester Pays flag if our service has these buckets enabled. String specialParamName = null; if (requesterPaysCheckBox.isSelected()) { specialParamName = Constants.REQUESTER_PAYS_BUCKET_FLAG; } // Generate URLs StringBuffer signedUrlsBuffer = new StringBuffer(); for (int i = 0; i < objects.length; i++) { S3Object currentObject = objects[i]; boolean disableDnsBuckets = false; String signedUrl = S3Service.createSignedUrl("GET", currentObject.getBucketName(), currentObject.getKey(), specialParamName, null, this.s3Service.getAWSCredentials(), secondsSinceEpoch, virtualHostCheckBox.isSelected(), httpsUrlsCheckBox.isSelected(), disableDnsBuckets); signedUrlsBuffer.append(signedUrl + "\n"); } signedUrlsTextArea.setText(signedUrlsBuffer.toString()); } catch (NumberFormatException e) { String message = "Hours must be a valid decimal value; eg 3, 0.1"; log.error(message, e); ErrorDialog.showDialog(ownerFrame, hyperlinkListener, message, e); } catch (S3ServiceException e) { String message = "Unable to generate public GET URL"; log.error(message, e); ErrorDialog.showDialog(ownerFrame, hyperlinkListener, message, e); } } }