| package org.apache.maven.archiva.applet; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| import java.applet.Applet; |
| import java.awt.BorderLayout; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.security.AccessController; |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| import java.security.PrivilegedAction; |
| |
| import javax.swing.JLabel; |
| import javax.swing.JProgressBar; |
| |
| /** |
| * Applet that takes a file on the local filesystem and checksums it for sending to the server. |
| * |
| */ |
| public class ChecksumApplet |
| extends Applet |
| { |
| private static final int CHECKSUM_BUFFER_SIZE = 8192; |
| |
| private static final int BYTE_MASK = 0xFF; |
| |
| private JProgressBar progressBar; |
| |
| public void init() |
| { |
| setLayout( new BorderLayout() ); |
| progressBar = new JProgressBar(); |
| progressBar.setStringPainted( true ); |
| add( progressBar, BorderLayout.CENTER ); |
| JLabel label = new JLabel( "Checksum progress: " ); |
| add( label, BorderLayout.WEST ); |
| } |
| |
| public String generateMd5( final String file ) |
| throws IOException, NoSuchAlgorithmException |
| { |
| return AccessController.doPrivileged( new PrivilegedAction<String>() |
| { |
| public String run() |
| { |
| try |
| { |
| return checksumFile( file ); |
| } |
| catch ( NoSuchAlgorithmException e ) |
| { |
| return "Error checksumming file: " + e.getMessage(); |
| } |
| catch ( FileNotFoundException e ) |
| { |
| return "Couldn't find the file: " + e.getMessage(); |
| } |
| catch ( IOException e ) |
| { |
| return "Error reading file: " + e.getMessage(); |
| } |
| } |
| } ); |
| } |
| |
| protected String checksumFile( String file ) |
| throws NoSuchAlgorithmException, IOException |
| { |
| MessageDigest digest = MessageDigest.getInstance( "MD5" ); |
| |
| File f = new File( file ); |
| long total = f.length(); |
| InputStream fis = new FileInputStream( f ); |
| try |
| { |
| long totalRead = 0; |
| byte[] buffer = new byte[CHECKSUM_BUFFER_SIZE]; |
| int numRead; |
| do |
| { |
| numRead = fis.read( buffer ); |
| if ( numRead > 0 ) |
| { |
| digest.update( buffer, 0, numRead ); |
| totalRead += numRead; |
| progressBar.setValue( (int) ( totalRead * progressBar.getMaximum() / total ) ); |
| } |
| } |
| while ( numRead != -1 ); |
| } |
| finally |
| { |
| fis.close(); |
| } |
| |
| return byteArrayToHexStr( digest.digest() ); |
| } |
| |
| protected static String byteArrayToHexStr( byte[] data ) |
| { |
| String output = ""; |
| |
| for ( int cnt = 0; cnt < data.length; cnt++ ) |
| { |
| //Deposit a byte into the 8 lsb of an int. |
| int tempInt = data[cnt] & BYTE_MASK; |
| |
| //Get hex representation of the int as a string. |
| String tempStr = Integer.toHexString( tempInt ); |
| |
| //Append a leading 0 if necessary so that each hex string will contain 2 characters. |
| if ( tempStr.length() == 1 ) |
| { |
| tempStr = "0" + tempStr; |
| } |
| |
| //Concatenate the two characters to the output string. |
| output = output + tempStr; |
| } |
| |
| return output.toUpperCase(); |
| } |
| } |