1 | /**
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2 | *############################################################################
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3 | * A component of the Greenstone Librarian Interface, part of the Greenstone
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4 | * digital library suite from the New Zealand Digital Library Project at the
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5 | * University of Waikato, New Zealand.
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6 | *
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7 | * Author: David Bainbridge, NZDL Project, University of Waikato, NZ
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8 | *
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9 | * Copyright (C) 2005 New Zealand Digital Library Project
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10 | *
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11 | * This program is free software; you can redistribute it and/or modify
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12 | * it under the terms of the GNU General Public License as published by
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13 | * the Free Software Foundation; either version 2 of the License, or
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14 | * (at your option) any later version.
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15 | *
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16 | * This program is distributed in the hope that it will be useful,
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17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 | * GNU General Public License for more details.
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20 | *
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21 | * You should have received a copy of the GNU General Public License
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22 | * along with this program; if not, write to the Free Software
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23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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24 | *############################################################################
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25 | */
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26 |
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27 | package org.greenstone.gatherer.util;
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28 |
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29 |
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30 | import java.io.*;
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31 | import java.util.*;
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32 | import java.util.zip.*;
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33 | import org.w3c.dom.*;
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34 |
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35 |
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36 | public class ZipTools
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37 | {
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38 | static public void unzipFile(String zip_file_path, String base_directory_path)
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39 | {
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40 | try {
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41 | ZipFile zip_file = new ZipFile(new File(zip_file_path), ZipFile.OPEN_READ);
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42 |
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43 | Enumeration e = zip_file.entries();
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44 | while (e.hasMoreElements()) {
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45 | ZipEntry zip_entry = (ZipEntry) e.nextElement();
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46 | File zip_entry_file = new File(base_directory_path + zip_entry.getName());
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47 | // System.err.println(" Unzipping: " + zip_entry_file.getAbsolutePath());
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48 |
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49 | // Directory case
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50 | if (zip_entry.isDirectory()) {
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51 | // Create named directory, if it doesn't already exist
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52 | if (!zip_entry_file.exists() && !zip_entry_file.mkdirs()) {
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53 | System.err.println("Error: unable to create directory " + zip_entry_file);
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54 | }
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55 | }
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56 |
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57 | // File case
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58 | else {
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59 | // Write out file to disk
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60 |
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61 | // Make sure its parent directory exists.
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62 | File dir = new File(zip_entry_file.getParent());
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63 | dir.mkdirs();
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64 |
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65 | // Set up input stream
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66 | InputStream zis = zip_file.getInputStream(zip_entry);
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67 | BufferedInputStream bzis = new BufferedInputStream(zis);
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68 | DataInputStream dbzis = new DataInputStream(bzis);
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69 |
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70 | // Set up output stream
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71 | FileOutputStream fzos = new FileOutputStream(zip_entry_file);
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72 | BufferedOutputStream bfzos = new BufferedOutputStream(fzos);
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73 |
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74 | byte[] buf = new byte[1024];
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75 | int len;
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76 | while ((len = dbzis.read(buf)) >= 0) {
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77 | bfzos.write(buf,0,len);
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78 | }
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79 |
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80 | dbzis.close();
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81 | bzis.close();
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82 | zis.close();
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83 |
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84 | bfzos.close();
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85 | fzos.close();
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86 | }
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87 | }
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88 |
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89 | zip_file.close();
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90 | }
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91 | catch (Exception exception) {
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92 | exception.printStackTrace();
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93 | }
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94 | }
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95 |
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96 |
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97 | static public void zipFiles(String zip_file_path, String base_directory_path, String[] relative_file_paths)
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98 | {
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99 | try {
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100 | ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(zip_file_path));
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101 | ZipFilter null_zip_filter = new NullZipFilter();
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102 |
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103 | // Add each file/directory in turn to the zip file
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104 | for (int i = 0; i < relative_file_paths.length; i++) {
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105 | String relative_file_path = relative_file_paths[i];
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106 | addFileToZip(zos, base_directory_path, relative_file_path, null_zip_filter);
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107 | }
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108 |
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109 | zos.close();
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110 | }
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111 | catch (Exception exception) {
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112 | exception.printStackTrace();
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113 | }
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114 | }
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115 |
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116 |
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117 | static public void addFileToZip(ZipOutputStream zos, String base_directory_path, String relative_file_path, ZipFilter zip_filter)
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118 | {
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119 | File file = new File(base_directory_path + File.separator + relative_file_path);
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120 |
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121 | // Check that the file/directory exists
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122 | if (!file.exists()) {
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123 | System.err.println("File " + file + " does not exist!");
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124 | return;
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125 | }
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126 |
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127 | try {
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128 | // Directory case
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129 | if (file.isDirectory()) {
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130 | // Add a zip entry for this directory
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131 | // Actually, don't -- this messes things up completely on Windows and doesn't seem to matter on Linux
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132 | // zos.putNextEntry(new ZipEntry(relative_file_path + File.separator));
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133 |
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134 | // Apply recursively to each of the children of the directory
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135 | File[] child_files = file.listFiles();
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136 | for (int i = 0; i < child_files.length; i++) {
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137 | addFileToZip(zos, base_directory_path, relative_file_path + File.separator + child_files[i].getName(), zip_filter);
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138 | }
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139 | }
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140 |
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141 | // File case
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142 | else {
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143 | // Add a zip entry for this file
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144 | if (zip_filter.shouldIncludeFile(relative_file_path)) {
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145 | // Always use Unix style paths in zip files, even on Windows
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146 | zos.putNextEntry(new ZipEntry(relative_file_path.replace('\\', '/')));
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147 |
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148 | if (zip_filter.shouldIncludeFileContent(relative_file_path)) {
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149 | BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
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150 | byte[] data = new byte[1024];
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151 | int bytes_read;
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152 | while ((bytes_read = zip_filter.filterFileContent(bis, data, 1024)) > -1) {
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153 | zos.write(data, 0, bytes_read);
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154 | }
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155 | bis.close();
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156 | }
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157 | }
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158 | }
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159 | }
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160 | catch (Exception exception) {
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161 | exception.printStackTrace();
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162 | }
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163 | }
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164 |
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165 |
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166 | public interface ZipFilter
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167 | {
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168 | public boolean shouldIncludeFile(String relative_file_path);
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169 |
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170 | public boolean shouldIncludeFileContent(String relative_file_path);
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171 |
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172 | public int filterFileContent(BufferedInputStream bis, byte[] data, int bytes_to_read);
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173 | }
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174 |
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175 |
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176 | static public class NullZipFilter
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177 | implements ZipFilter
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178 | {
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179 | public boolean shouldIncludeFile(String relative_file_path)
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180 | {
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181 | // All files are included
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182 | return true;
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183 | }
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184 |
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185 |
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186 | public boolean shouldIncludeFileContent(String relative_file_path)
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187 | {
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188 | // Content for all files is included
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189 | return true;
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190 | }
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191 |
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192 |
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193 | public int filterFileContent(BufferedInputStream bis, byte[] data, int bytes_to_read)
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194 | {
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195 | try {
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196 | return bis.read(data, 0, bytes_to_read);
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197 | }
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198 | catch (Exception exception) {
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199 | exception.printStackTrace();
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200 | }
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201 |
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202 | return -1;
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203 | }
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204 | }
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205 | }
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