1 | <?php |
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2 | # ***** BEGIN LICENSE BLOCK ***** |
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3 | # This file is part of Clearbricks. |
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4 | # Copyright (c) 2008 Olivier Meunier and contributors. |
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5 | # All rights reserved. |
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6 | # |
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7 | # Clearbricks is free software; you can redistribute it and/or modify |
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8 | # it under the terms of the GNU General Public License as published by |
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9 | # the Free Software Foundation; either version 2 of the License, or |
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10 | # (at your option) any later version. |
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11 | # |
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12 | # Clearbricks is distributed in the hope that it will be useful, |
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13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | # GNU General Public License for more details. |
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16 | # |
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17 | # You should have received a copy of the GNU General Public License |
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18 | # along with Clearbricks; if not, write to the Free Software |
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19 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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20 | # |
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21 | # ***** END LICENSE BLOCK ***** |
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22 | |
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23 | class fileUnzip |
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24 | { |
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25 | protected $file_name; |
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26 | protected $compressed_list = array(); |
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27 | protected $eo_central = array(); |
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28 | |
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29 | protected $zip_sig = "\x50\x4b\x03\x04"; # local file header signature |
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30 | protected $dir_sig = "\x50\x4b\x01\x02"; # central dir header signature |
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31 | protected $dir_sig_e = "\x50\x4b\x05\x06"; # end of central dir signature |
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32 | protected $fp = null; |
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33 | |
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34 | protected $memory_limit = null; |
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35 | |
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36 | public function __construct($file_name) |
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37 | { |
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38 | $this->file_name = $file_name; |
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39 | } |
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40 | |
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41 | public function __destroy() |
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42 | { |
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43 | $this->close(); |
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44 | } |
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45 | |
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46 | public function close() |
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47 | { |
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48 | if ($this->fp) { |
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49 | fclose($this->fp); |
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50 | } |
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51 | |
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52 | if ($this->memory_limit) { |
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53 | ini_set('memory_limit',$this->memory_limit); |
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54 | } |
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55 | } |
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56 | |
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57 | public function getList($stop_on_file=false,$exclude=false) |
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58 | { |
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59 | if (!empty($this->compressed_list)) { |
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60 | return $this->compressed_list; |
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61 | } |
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62 | |
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63 | if (!$this->loadFileListByEOF($stop_on_file,$exclude)) { |
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64 | if(!$this->loadFileListBySignatures($stop_on_file,$exclude)) { |
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65 | return false; |
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66 | } |
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67 | } |
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68 | |
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69 | return $this->compressed_list; |
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70 | } |
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71 | |
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72 | public function unzipAll($target) |
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73 | { |
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74 | if (empty($this->compressed_list)) { |
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75 | $this->getList(); |
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76 | } |
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77 | |
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78 | foreach ($this->compressed_list as $k => $v) |
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79 | { |
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80 | if ($v['is_dir']) { |
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81 | continue; |
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82 | } |
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83 | |
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84 | $this->unzip($k,$target.'/'.$k); |
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85 | } |
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86 | } |
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87 | |
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88 | public function unzip($file_name,$target=false) |
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89 | { |
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90 | if (empty($this->compressed_list)) { |
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91 | $this->getList($file_name); |
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92 | } |
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93 | |
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94 | if (!isset($this->compressed_list[$file_name])) { |
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95 | throw new Exception(sprintf(__('File %s is not compressed in the zip.'),$file_name)); |
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96 | } |
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97 | $details =& $this->compressed_list[$file_name]; |
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98 | |
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99 | if ($details['is_dir']) { |
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100 | throw new Exception(sprintf(__('Trying to unzip a folder name %s'),$file_name)); |
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101 | } |
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102 | |
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103 | if (!$details['uncompressed_size']) { |
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104 | return $this->putContent('',$target); |
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105 | } |
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106 | |
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107 | if ($target) { |
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108 | $this->testTargetDir(dirname($target)); |
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109 | } |
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110 | |
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111 | fseek($this->fp(),$details['contents_start_offset']); |
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112 | |
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113 | $this->memoryAllocate($details['compressed_size']); |
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114 | return $this->uncompress( |
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115 | fread($this->fp(), $details['compressed_size']), |
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116 | $details['compression_method'], |
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117 | $details['uncompressed_size'], |
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118 | $target |
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119 | ); |
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120 | } |
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121 | |
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122 | public function getFilesList() |
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123 | { |
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124 | if (empty($this->compressed_list)) { |
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125 | $this->getList(); |
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126 | } |
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127 | |
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128 | $res = array(); |
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129 | foreach ($this->compressed_list as $k => $v) { |
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130 | if (!$v['is_dir']) { |
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131 | $res[] = $k; |
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132 | } |
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133 | } |
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134 | return $res; |
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135 | } |
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136 | |
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137 | public function getDirsList() |
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138 | { |
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139 | if (empty($this->compressed_list)) { |
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140 | $this->getList(); |
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141 | } |
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142 | |
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143 | $res = array(); |
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144 | foreach ($this->compressed_list as $k => $v) { |
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145 | if ($v['is_dir']) { |
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146 | $res[] = substr($k,0,-1); |
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147 | } |
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148 | } |
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149 | return $res; |
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150 | } |
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151 | |
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152 | public function getRootDir() |
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153 | { |
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154 | if (empty($this->compressed_list)) { |
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155 | $this->getList(); |
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156 | } |
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157 | |
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158 | $files = $this->getFilesList(); |
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159 | $dirs = $this->getDirsList(); |
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160 | |
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161 | $root_files = 0; |
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162 | $root_dirs = 0; |
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163 | foreach ($files as $v) { if (strpos($v,'/') === false) { $root_files++; }} |
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164 | foreach ($dirs as $v) { if (strpos($v,'/') === false) { $root_dirs++; }} |
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165 | |
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166 | if ($root_files == 0 && $root_dirs == 1) { |
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167 | return $dirs[0]; |
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168 | } else { |
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169 | return false; |
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170 | } |
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171 | } |
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172 | |
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173 | public function isEmpty() |
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174 | { |
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175 | if (empty($this->compressed_list)) { |
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176 | $this->getList(); |
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177 | } |
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178 | |
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179 | return count($this->compressed_list) == 0; |
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180 | } |
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181 | |
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182 | public function hasFile($f) |
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183 | { |
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184 | if (empty($this->compressed_list)) { |
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185 | $this->getList(); |
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186 | } |
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187 | |
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188 | return isset($this->compressed_list[$f]); |
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189 | } |
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190 | |
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191 | protected function fp() |
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192 | { |
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193 | if ($this->fp === null) { |
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194 | $this->fp = @fopen($this->file_name,'rb'); |
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195 | } |
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196 | |
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197 | if ($this->fp === false) { |
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198 | throw new Exception('Unable to open file.'); |
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199 | } |
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200 | |
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201 | return $this->fp; |
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202 | } |
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203 | |
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204 | protected function putContent($content,$target=false) |
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205 | { |
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206 | if ($target) { |
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207 | $r = @file_put_contents($target,$content); |
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208 | if ($r === false) { |
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209 | throw new Exception(__('Unable to write destination file.')); |
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210 | } |
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211 | files::inheritChmod($target); |
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212 | return true; |
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213 | } |
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214 | return $content; |
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215 | } |
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216 | |
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217 | protected function testTargetDir($dir) |
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218 | { |
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219 | if (is_dir($dir) && !is_writable($dir)) { |
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220 | throw new Exception(__('Unable to write in target directory, permission denied.')); |
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221 | } |
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222 | |
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223 | if (!is_dir($dir)) { |
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224 | files::makeDir($dir,true); |
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225 | } |
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226 | } |
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227 | |
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228 | protected function uncompress($content,$mode,$size,$target=false) |
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229 | { |
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230 | switch ($mode) |
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231 | { |
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232 | case 0: |
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233 | # Not compressed |
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234 | $this->memoryAllocate($size*2); |
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235 | return $this->putContent($content,$target); |
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236 | case 1: |
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237 | throw new Exception('Shrunk mode is not supported.'); |
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238 | case 2: |
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239 | case 3: |
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240 | case 4: |
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241 | case 5: |
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242 | throw new Exception('Compression factor '.($mode-1).' is not supported.'); |
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243 | case 6: |
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244 | throw new Exception('Implode is not supported.'); |
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245 | case 7: |
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246 | throw new Exception('Tokenizing compression algorithm is not supported.'); |
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247 | case 8: |
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248 | # Deflate |
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249 | if (!function_exists('gzinflate')) { |
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250 | throw new Exception('Gzip functions are not available.'); |
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251 | } |
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252 | $this->memoryAllocate($size*2); |
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253 | return $this->putContent(gzinflate($content,$size),$target); |
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254 | case 9: |
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255 | throw new Exception('Enhanced Deflating is not supported.'); |
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256 | case 10: |
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257 | throw new Exception('PKWARE Date Compression Library Impoloding is not supported.'); |
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258 | case 12: |
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259 | # Bzip2 |
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260 | if (!function_exists('bzdecompress')) { |
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261 | throw new Exception('Bzip2 functions are not available.'); |
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262 | } |
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263 | $this->memoryAllocate($size*2); |
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264 | return $this->putContent(bzdecompress($content),$target); |
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265 | case 18: |
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266 | throw new Exception('IBM TERSE is not supported.'); |
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267 | default: |
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268 | throw new Exception('Unknown uncompress method'); |
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269 | } |
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270 | } |
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271 | |
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272 | protected function loadFileListByEOF($stop_on_file=false,$exclude=false) |
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273 | { |
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274 | $fp = $this->fp(); |
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275 | |
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276 | for ($x=0; $x<1024; $x++) |
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277 | { |
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278 | fseek($fp,-22-$x,SEEK_END); |
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279 | $signature = fread($fp,4); |
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280 | |
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281 | if ($signature == $this->dir_sig_e) |
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282 | { |
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283 | $dir_list = array(); |
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284 | |
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285 | $eodir = array( |
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286 | 'disk_number_this' => unpack('v', fread($fp,2)), |
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287 | 'disk_number' => unpack('v', fread($fp,2)), |
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288 | 'total_entries_this' => unpack('v', fread($fp,2)), |
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289 | 'total_entries' => unpack('v', fread($fp,2)), |
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290 | 'size_of_cd' => unpack('V', fread($fp,4)), |
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291 | 'offset_start_cd' => unpack('V', fread($fp,4)) |
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292 | ); |
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293 | |
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294 | $zip_comment_len = unpack('v', fread($fp,2)); |
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295 | $eodir['zipfile_comment'] = $zip_comment_len[1] ? fread($fp,$zip_comment_len) : ''; |
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296 | |
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297 | $this->eo_central = array( |
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298 | 'disk_number_this' => $eodir['disk_number_this'][1], |
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299 | 'disk_number' => $eodir['disk_number'][1], |
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300 | 'total_entries_this' => $eodir['total_entries_this'][1], |
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301 | 'total_entries' => $eodir['total_entries'][1], |
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302 | 'size_of_cd' => $eodir['size_of_cd'][1], |
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303 | 'offset_start_cd' => $eodir['offset_start_cd'][1], |
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304 | 'zipfile_comment' => $eodir['zipfile_comment'] |
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305 | ); |
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306 | |
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307 | fseek($fp, $this->eo_central['offset_start_cd']); |
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308 | $signature = fread($fp,4); |
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309 | |
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310 | while ($signature == $this->dir_sig) |
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311 | { |
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312 | $dir = array(); |
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313 | $dir['version_madeby'] = unpack("v",fread($fp, 2)); # version made by |
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314 | $dir['version_needed'] = unpack("v",fread($fp, 2)); # version needed to extract |
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315 | $dir['general_bit_flag'] = unpack("v",fread($fp, 2)); # general purpose bit flag |
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316 | $dir['compression_method'] = unpack("v",fread($fp, 2)); # compression method |
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317 | $dir['lastmod_time'] = unpack("v",fread($fp, 2)); # last mod file time |
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318 | $dir['lastmod_date'] = unpack("v",fread($fp, 2)); # last mod file date |
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319 | $dir['crc-32'] = fread($fp,4); # crc-32 |
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320 | $dir['compressed_size'] = unpack("V",fread($fp, 4)); # compressed size |
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321 | $dir['uncompressed_size'] = unpack("V",fread($fp, 4)); # uncompressed size |
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322 | |
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323 | $file_name_len = unpack("v",fread($fp, 2)); # filename length |
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324 | $extra_field_len = unpack("v",fread($fp, 2)); # extra field length |
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325 | $file_comment_len = unpack("v",fread($fp, 2)); # file comment length |
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326 | |
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327 | $dir['disk_number_start'] = unpack("v",fread($fp, 2)); # disk number start |
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328 | $dir['internal_attributes'] = unpack("v",fread($fp, 2)); # internal file attributes-byte1 |
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329 | $dir['external_attributes1'] = unpack("v",fread($fp, 2)); # external file attributes-byte2 |
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330 | $dir['external_attributes2'] = unpack("v",fread($fp, 2)); # external file attributes |
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331 | $dir['relative_offset'] = unpack("V",fread($fp, 4)); # relative offset of local header |
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332 | $dir['file_name'] = $this->cleanFileName(fread($fp, $file_name_len[1])); # filename |
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333 | $dir['extra_field'] = $extra_field_len[1] ? fread($fp, $extra_field_len[1]) : ''; # extra field |
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334 | $dir['file_comment'] = $file_comment_len[1] ? fread($fp, $file_comment_len[1]) : ''; # file comment |
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335 | |
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336 | $dir_list[$dir['file_name']] = array( |
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337 | 'version_madeby' => $dir['version_madeby'][1], |
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338 | 'version_needed' => $dir['version_needed'][1], |
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339 | 'general_bit_flag' => str_pad(decbin($dir['general_bit_flag'][1]), 8, '0', STR_PAD_LEFT), |
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340 | 'compression_method' => $dir['compression_method'][1], |
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341 | 'lastmod_datetime' => $this->getTimeStamp($dir['lastmod_date'][1],$dir['lastmod_time'][1]), |
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342 | 'crc-32' => str_pad(dechex(ord($dir['crc-32'][3])), 2, '0', STR_PAD_LEFT). |
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343 | str_pad(dechex(ord($dir['crc-32'][2])), 2, '0', STR_PAD_LEFT). |
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344 | str_pad(dechex(ord($dir['crc-32'][1])), 2, '0', STR_PAD_LEFT). |
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345 | str_pad(dechex(ord($dir['crc-32'][0])), 2, '0', STR_PAD_LEFT), |
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346 | 'compressed_size' => $dir['compressed_size'][1], |
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347 | 'uncompressed_size' => $dir['uncompressed_size'][1], |
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348 | 'disk_number_start' => $dir['disk_number_start'][1], |
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349 | 'internal_attributes' => $dir['internal_attributes'][1], |
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350 | 'external_attributes1' => $dir['external_attributes1'][1], |
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351 | 'external_attributes2' => $dir['external_attributes2'][1], |
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352 | 'relative_offset' => $dir['relative_offset'][1], |
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353 | 'file_name' => $dir['file_name'], |
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354 | 'extra_field' => $dir['extra_field'], |
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355 | 'file_comment' => $dir['file_comment'] |
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356 | ); |
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357 | $signature = fread($fp, 4); |
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358 | } |
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359 | |
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360 | foreach ($dir_list as $k => $v) |
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361 | { |
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362 | if ($exclude && preg_match($exclude,$k)) { |
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363 | continue; |
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364 | } |
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365 | |
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366 | $i = $this->getFileHeaderInformation($v['relative_offset']); |
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367 | |
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368 | $this->compressed_list[$k]['file_name'] = $k; |
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369 | $this->compressed_list[$k]['is_dir'] = $v['external_attributes1'] == 16 || substr($k,-1,1) == '/'; |
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370 | $this->compressed_list[$k]['compression_method'] = $v['compression_method']; |
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371 | $this->compressed_list[$k]['version_needed'] = $v['version_needed']; |
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372 | $this->compressed_list[$k]['lastmod_datetime'] = $v['lastmod_datetime']; |
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373 | $this->compressed_list[$k]['crc-32'] = $v['crc-32']; |
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374 | $this->compressed_list[$k]['compressed_size'] = $v['compressed_size']; |
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375 | $this->compressed_list[$k]['uncompressed_size'] = $v['uncompressed_size']; |
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376 | $this->compressed_list[$k]['lastmod_datetime'] = $v['lastmod_datetime']; |
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377 | $this->compressed_list[$k]['extra_field'] = $i['extra_field']; |
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378 | $this->compressed_list[$k]['contents_start_offset'] = $i['contents_start_offset']; |
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379 | |
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380 | if(strtolower($stop_on_file) == strtolower($k)) { |
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381 | break; |
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382 | } |
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383 | } |
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384 | return true; |
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385 | } |
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386 | } |
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387 | return false; |
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388 | } |
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389 | |
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390 | protected function loadFileListBySignatures($stop_on_file=false,$exclude=false) |
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391 | { |
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392 | $fp = $this->fp(); |
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393 | fseek($fp,0); |
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394 | |
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395 | $return = false; |
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396 | while(true) |
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397 | { |
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398 | $details = $this->getFileHeaderInformation(); |
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399 | if (!$details) { |
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400 | fseek($fp,12-4,SEEK_CUR); # 12: Data descriptor - 4: Signature (that will be read again) |
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401 | $details = $this->getFileHeaderInformation(); |
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402 | } |
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403 | if (!$details) { |
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404 | break; |
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405 | } |
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406 | $filename = $details['file_name']; |
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407 | |
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408 | if ($exclude && preg_match($exclude,$filename)) { |
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409 | continue; |
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410 | } |
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411 | |
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412 | $this->compressed_list[$filename] = $details; |
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413 | $return = true; |
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414 | |
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415 | if (strtolower($stop_on_file) == strtolower($filename)) { |
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416 | break; |
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417 | } |
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418 | } |
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419 | |
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420 | return $return; |
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421 | } |
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422 | |
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423 | protected function getFileHeaderInformation($start_offset=false) |
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424 | { |
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425 | $fp = $this->fp(); |
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426 | |
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427 | if ($start_offset !== false) { |
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428 | fseek($fp,$start_offset); |
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429 | } |
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430 | |
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431 | $signature = fread($fp, 4); |
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432 | if ($signature == $this->zip_sig) |
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433 | { |
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434 | # Get information about the zipped file |
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435 | $file = array(); |
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436 | $file['version_needed'] = unpack("v",fread($fp, 2)); # version needed to extract |
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437 | $file['general_bit_flag'] = unpack("v",fread($fp, 2)); # general purpose bit flag |
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438 | $file['compression_method'] = unpack("v",fread($fp, 2)); # compression method |
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439 | $file['lastmod_time'] = unpack("v",fread($fp, 2)); # last mod file time |
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440 | $file['lastmod_date'] = unpack("v",fread($fp, 2)); # last mod file date |
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441 | $file['crc-32'] = fread($fp,4); # crc-32 |
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442 | $file['compressed_size'] = unpack("V",fread($fp, 4)); # compressed size |
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443 | $file['uncompressed_size'] = unpack("V",fread($fp, 4)); # uncompressed size |
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444 | |
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445 | $file_name_len = unpack("v",fread($fp, 2)); # filename length |
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446 | $extra_field_len = unpack("v",fread($fp, 2)); # extra field length |
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447 | |
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448 | $file['file_name'] = $this->cleanFileName(fread($fp,$file_name_len[1])); # filename |
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449 | $file['extra_field'] = $extra_field_len[1] ? fread($fp, $extra_field_len[1]) : ''; # extra field |
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450 | $file['contents_start_offset'] = ftell($fp); |
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451 | |
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452 | # Look for the next file |
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453 | fseek($fp, $file['compressed_size'][1], SEEK_CUR); |
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454 | |
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455 | # Mount file table |
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456 | $i = array( |
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457 | 'file_name' => $file['file_name'], |
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458 | 'is_dir' => substr($file['file_name'],-1,1) == '/', |
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459 | 'compression_method' => $file['compression_method'][1], |
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460 | 'version_needed' => $file['version_needed'][1], |
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461 | 'lastmod_datetime' => $this->getTimeStamp($file['lastmod_date'][1],$file['lastmod_time'][1]), |
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462 | 'crc-32' => str_pad(dechex(ord($file['crc-32'][3])), 2, '0', STR_PAD_LEFT). |
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463 | str_pad(dechex(ord($file['crc-32'][2])), 2, '0', STR_PAD_LEFT). |
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464 | str_pad(dechex(ord($file['crc-32'][1])), 2, '0', STR_PAD_LEFT). |
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465 | str_pad(dechex(ord($file['crc-32'][0])), 2, '0', STR_PAD_LEFT), |
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466 | 'compressed_size' => $file['compressed_size'][1], |
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467 | 'uncompressed_size' => $file['uncompressed_size'][1], |
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468 | 'extra_field' => $file['extra_field'], |
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469 | 'general_bit_flag' => str_pad(decbin($file['general_bit_flag'][1]), 8, '0', STR_PAD_LEFT), |
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470 | 'contents_start_offset'=>$file['contents_start_offset'] |
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471 | ); |
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472 | return $i; |
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473 | } |
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474 | return false; |
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475 | } |
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476 | |
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477 | protected function getTimeStamp($date,$time) |
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478 | { |
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479 | $BINlastmod_date = str_pad(decbin($date), 16, '0', STR_PAD_LEFT); |
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480 | $BINlastmod_time = str_pad(decbin($time), 16, '0', STR_PAD_LEFT); |
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481 | $lastmod_dateY = bindec(substr($BINlastmod_date, 0, 7))+1980; |
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482 | $lastmod_dateM = bindec(substr($BINlastmod_date, 7, 4)); |
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483 | $lastmod_dateD = bindec(substr($BINlastmod_date, 11, 5)); |
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484 | $lastmod_timeH = bindec(substr($BINlastmod_time, 0, 5)); |
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485 | $lastmod_timeM = bindec(substr($BINlastmod_time, 5, 6)); |
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486 | $lastmod_timeS = bindec(substr($BINlastmod_time, 11, 5)) * 2; |
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487 | |
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488 | return mktime($lastmod_timeH, $lastmod_timeM, $lastmod_timeS, $lastmod_dateM, $lastmod_dateD, $lastmod_dateY); |
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489 | } |
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490 | |
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491 | protected function cleanFileName($n) |
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492 | { |
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493 | $n = str_replace('../','',$n); |
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494 | $n = preg_replace('#^/+#','',$n); |
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495 | return $n; |
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496 | } |
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497 | |
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498 | protected function memoryAllocate($size) |
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499 | { |
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500 | $mem_used = function_exists('memory_get_usage') ? @memory_get_usage() : 4000000; |
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501 | $mem_limit = @ini_get('memory_limit'); |
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502 | if ($mem_used && $mem_limit) |
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503 | { |
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504 | $mem_limit = files::str2bytes($mem_limit); |
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505 | $mem_avail = $mem_limit-$mem_used-(512*1024); |
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506 | $mem_needed = $size; |
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507 | |
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508 | if ($mem_needed > $mem_avail) |
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509 | { |
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510 | if (@ini_set('memory_limit',$mem_limit+$mem_needed+$mem_used) === false) { |
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511 | throw new Exception(__('Not enough memory to open file.')); |
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512 | } |
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513 | |
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514 | if (!$this->memory_limit) { |
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515 | $this->memory_limit = $mem_limit; |
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516 | } |
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517 | } |
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518 | } |
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519 | } |
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520 | } |
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521 | ?> |
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