1 | <?php |
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2 | # -- BEGIN LICENSE BLOCK --------------------------------------- |
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3 | # |
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4 | # This file is part of Dotclear 2. |
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5 | # |
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6 | # Copyright (c) 2003-2013 Olivier Meunier & Association Dotclear |
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7 | # Licensed under the GPL version 2.0 license. |
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8 | # See LICENSE file or |
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9 | # http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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10 | # |
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11 | # -- END LICENSE BLOCK ----------------------------------------- |
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12 | if (!defined('DC_RC_PATH')) { return; } |
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13 | |
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14 | class dcUpdate |
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15 | { |
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16 | const ERR_FILES_CHANGED = 101; |
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17 | const ERR_FILES_UNREADABLE = 102; |
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18 | const ERR_FILES_UNWRITALBE = 103; |
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19 | |
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20 | protected $url; |
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21 | protected $subject; |
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22 | protected $version; |
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23 | protected $cache_file; |
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24 | |
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25 | protected $version_info = array( |
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26 | 'version' => null, |
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27 | 'href' => null, |
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28 | 'checksum' => null, |
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29 | 'info' => null, |
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30 | 'notify' => true |
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31 | ); |
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32 | |
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33 | protected $cache_ttl = '-6 hours'; |
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34 | protected $forced_files = array(); |
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35 | |
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36 | /** |
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37 | * Constructor |
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38 | * |
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39 | * @param url string Versions file URL |
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40 | * @param subject string Subject to check |
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41 | * @param version string Version type |
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42 | * @param cache_dir string Directory cache path |
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43 | */ |
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44 | public function __construct($url,$subject,$version,$cache_dir) |
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45 | { |
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46 | $this->url = $url; |
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47 | $this->subject = $subject; |
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48 | $this->version = $version; |
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49 | $this->cache_file = $cache_dir.'/'.$subject.'-'.$version; |
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50 | } |
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51 | |
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52 | /** |
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53 | * Checks for Dotclear updates. |
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54 | * Returns latest version if available or false. |
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55 | * |
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56 | * @param version string Current version to compare |
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57 | * @param nocache boolean Force checking |
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58 | * @return string Latest version if available |
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59 | */ |
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60 | public function check($version, $nocache=false) |
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61 | { |
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62 | $this->getVersionInfo($nocache); |
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63 | $v = $this->getVersion(); |
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64 | if ($v && version_compare($version,$v,'<')) { |
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65 | return $v; |
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66 | } |
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67 | |
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68 | return false; |
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69 | } |
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70 | |
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71 | public function getVersionInfo($nocache=false) |
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72 | { |
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73 | # Check cached file |
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74 | if (is_readable($this->cache_file) && filemtime($this->cache_file) > strtotime($this->cache_ttl) && !$nocache) |
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75 | { |
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76 | $c = @file_get_contents($this->cache_file); |
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77 | $c = @unserialize($c); |
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78 | if (is_array($c)) { |
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79 | $this->version_info = $c; |
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80 | return; |
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81 | } |
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82 | } |
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83 | |
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84 | $cache_dir = dirname($this->cache_file); |
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85 | $can_write = (!is_dir($cache_dir) && is_writable(dirname($cache_dir))) |
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86 | || (!file_exists($this->cache_file) && is_writable($cache_dir)) |
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87 | || is_writable($this->cache_file); |
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88 | |
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89 | # If we can't write file, don't bug host with queries |
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90 | if (!$can_write) { |
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91 | return; |
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92 | } |
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93 | |
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94 | if (!is_dir($cache_dir)) { |
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95 | try { |
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96 | files::makeDir($cache_dir); |
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97 | } catch (Exception $e) { |
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98 | return; |
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99 | } |
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100 | } |
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101 | |
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102 | # Try to get latest version number |
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103 | try |
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104 | { |
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105 | $path = ''; |
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106 | $client = netHttp::initClient($this->url,$path); |
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107 | if ($client !== false) { |
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108 | $client->setTimeout(4); |
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109 | $client->setUserAgent($_SERVER['HTTP_USER_AGENT']); |
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110 | $client->get($path); |
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111 | |
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112 | $this->readVersion($client->getContent()); |
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113 | } |
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114 | } |
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115 | catch (Exception $e) {} |
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116 | |
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117 | # Create cache |
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118 | file_put_contents($this->cache_file,serialize($this->version_info)); |
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119 | } |
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120 | |
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121 | public function getVersion() |
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122 | { |
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123 | return $this->version_info['version']; |
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124 | } |
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125 | |
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126 | public function getFileURL() |
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127 | { |
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128 | return $this->version_info['href']; |
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129 | } |
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130 | |
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131 | public function getInfoURL() |
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132 | { |
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133 | return $this->version_info['info']; |
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134 | } |
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135 | |
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136 | public function getChecksum() |
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137 | { |
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138 | return $this->version_info['checksum']; |
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139 | } |
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140 | |
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141 | public function getNotify() |
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142 | { |
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143 | return $this->version_info['notify']; |
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144 | } |
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145 | |
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146 | public function getForcedFiles() |
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147 | { |
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148 | return $this->forced_files; |
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149 | } |
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150 | |
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151 | public function setForcedFiles() |
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152 | { |
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153 | $this->forced_files = func_get_args(); |
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154 | } |
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155 | |
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156 | /** |
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157 | * Sets notification flag. |
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158 | */ |
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159 | public function setNotify($n) |
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160 | { |
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161 | |
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162 | if (!is_writable($this->cache_file)) { |
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163 | return; |
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164 | } |
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165 | |
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166 | $this->version_info['notify'] = (boolean) $n; |
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167 | file_put_contents($this->cache_file,serialize($this->version_info)); |
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168 | } |
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169 | |
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170 | public function checkIntegrity($digests_file,$root) |
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171 | { |
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172 | if (!$digests_file) { |
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173 | throw new Exception(__('Digests file not found.')); |
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174 | } |
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175 | |
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176 | $changes = $this->md5sum($root,$digests_file); |
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177 | |
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178 | if (!empty($changes)) { |
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179 | $e = new Exception('Some files have changed.',self::ERR_FILES_CHANGED); |
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180 | $e->bad_files = $changes; |
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181 | throw $e; |
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182 | } |
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183 | |
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184 | return true; |
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185 | } |
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186 | |
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187 | /** |
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188 | * Downloads new version to destination $dest. |
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189 | */ |
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190 | public function download($dest) |
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191 | { |
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192 | $url = $this->getFileURL(); |
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193 | |
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194 | if (!$url) { |
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195 | throw new Exception(__('No file to download')); |
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196 | } |
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197 | |
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198 | if (!is_writable(dirname($dest))) { |
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199 | throw new Exception(__('Root directory is not writable.')); |
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200 | } |
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201 | |
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202 | try |
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203 | { |
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204 | $client = netHttp::initClient($url,$path); |
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205 | $client->setTimeout(4); |
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206 | $client->setUserAgent($_SERVER['HTTP_USER_AGENT']); |
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207 | $client->useGzip(false); |
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208 | $client->setPersistReferers(false); |
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209 | $client->setOutput($dest); |
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210 | $client->get($path); |
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211 | |
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212 | if ($client->getStatus() != 200) { |
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213 | @unlink($dest); |
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214 | throw new Exception(); |
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215 | } |
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216 | } |
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217 | catch (Exception $e) |
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218 | { |
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219 | throw new Exception(__('An error occurred while downloading archive.')); |
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220 | } |
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221 | } |
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222 | |
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223 | /** |
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224 | * Checks if archive was successfully downloaded. |
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225 | */ |
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226 | public function checkDownload($zip) |
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227 | { |
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228 | $cs = $this->getChecksum(); |
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229 | |
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230 | return $cs && is_readable($zip) && md5_file($zip) == $cs; |
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231 | } |
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232 | |
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233 | /** |
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234 | * Backups changed files before an update. |
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235 | */ |
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236 | public function backup($zip_file,$zip_digests,$root,$root_digests,$dest) |
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237 | { |
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238 | if (!is_readable($zip_file)) { |
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239 | throw new Exception(__('Archive not found.')); |
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240 | } |
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241 | |
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242 | if (!is_readable($root_digests)) { |
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243 | @unlink($zip_file); |
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244 | throw new Exception(__('Unable to read current digests file.')); |
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245 | } |
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246 | |
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247 | # Stop everything if a backup already exists and can not be overrided |
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248 | if (!is_writable(dirname($dest)) && !file_exists($dest)) { |
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249 | throw new Exception(__('Root directory is not writable.')); |
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250 | } |
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251 | |
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252 | if (file_exists($dest) && !is_writable($dest)) { |
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253 | return false; |
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254 | } |
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255 | |
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256 | $b_fp = @fopen($dest,'wb'); |
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257 | if ($b_fp === false) { |
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258 | return false; |
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259 | } |
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260 | |
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261 | $zip = new fileUnzip($zip_file); |
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262 | $b_zip = new fileZip($b_fp); |
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263 | |
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264 | if (!$zip->hasFile($zip_digests)) |
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265 | { |
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266 | @unlink($zip_file); |
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267 | throw new Exception(__('Downloaded file does not seem to be a valid archive.')); |
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268 | } |
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269 | |
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270 | $opts = FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES; |
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271 | $cur_digests = file($root_digests,$opts); |
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272 | $new_digests = explode("\n",$zip->unzip($zip_digests)); |
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273 | $new_files = $this->getNewFiles($cur_digests,$new_digests); |
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274 | $zip->close(); |
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275 | unset($opts,$cur_digests,$new_digests,$zip); |
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276 | |
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277 | $not_readable = array(); |
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278 | |
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279 | if (!empty($this->forced_files)) { |
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280 | $new_files = array_merge($new_files,$this->forced_files); |
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281 | } |
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282 | |
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283 | foreach ($new_files as $file) |
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284 | { |
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285 | if (!$file || !file_exists($root.'/'.$file)) { |
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286 | continue; |
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287 | } |
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288 | |
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289 | try { |
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290 | $b_zip->addFile($root.'/'.$file,$file); |
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291 | } catch (Exception $e) { |
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292 | $not_readable[] = $file; |
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293 | } |
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294 | } |
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295 | |
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296 | # If only one file is not readable, stop everything now |
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297 | if (!empty($not_readable)) { |
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298 | $e = new Exception('Some files are not readable.',self::ERR_FILES_UNREADABLE); |
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299 | $e->bad_files = $not_readable; |
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300 | throw $e; |
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301 | } |
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302 | |
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303 | $b_zip->write(); |
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304 | fclose($b_fp); |
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305 | $b_zip->close(); |
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306 | |
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307 | return true; |
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308 | } |
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309 | |
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310 | /** |
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311 | * Upgrade process. |
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312 | */ |
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313 | public function performUpgrade($zip_file,$zip_digests,$zip_root,$root,$root_digests) |
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314 | { |
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315 | if (!is_readable($zip_file)) { |
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316 | throw new Exception(__('Archive not found.')); |
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317 | } |
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318 | |
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319 | if (!is_readable($root_digests)) { |
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320 | @unlink($zip_file); |
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321 | throw new Exception(__('Unable to read current digests file.')); |
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322 | } |
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323 | |
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324 | $zip = new fileUnzip($zip_file); |
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325 | |
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326 | if (!$zip->hasFile($zip_digests)) |
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327 | { |
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328 | @unlink($zip_file); |
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329 | throw new Exception(__('Downloaded file does not seem to be a valid archive.')); |
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330 | } |
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331 | |
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332 | $opts = FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES; |
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333 | $cur_digests = file($root_digests,$opts); |
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334 | $new_digests = explode("\n",$zip->unzip($zip_digests)); |
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335 | $new_files = self::getNewFiles($cur_digests,$new_digests); |
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336 | |
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337 | if (!empty($this->forced_files)) { |
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338 | $new_files = array_merge($new_files,$this->forced_files); |
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339 | } |
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340 | |
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341 | $zip_files = array(); |
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342 | $not_writable = array(); |
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343 | |
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344 | foreach ($new_files as $file) |
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345 | { |
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346 | if (!$file) { |
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347 | continue; |
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348 | } |
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349 | |
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350 | if (!$zip->hasFile($zip_root.'/'.$file)) { |
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351 | @unlink($zip_file); |
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352 | throw new Exception(__('Incomplete archive.')); |
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353 | } |
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354 | |
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355 | $dest = $dest_dir = $root.'/'.$file; |
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356 | while (!is_dir($dest_dir = dirname($dest_dir))); |
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357 | |
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358 | if ((file_exists($dest) && !is_writable($dest)) || |
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359 | (!file_exists($dest) && !is_writable($dest_dir))) { |
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360 | $not_writable[] = $file; |
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361 | continue; |
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362 | } |
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363 | |
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364 | $zip_files[] = $file; |
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365 | } |
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366 | |
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367 | # If only one file is not writable, stop everything now |
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368 | if (!empty($not_writable)) { |
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369 | $e = new Exception('Some files are not writable',self::ERR_FILES_UNWRITALBE); |
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370 | $e->bad_files = $not_writable; |
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371 | throw $e; |
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372 | } |
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373 | |
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374 | # Everything's fine, we can write files, then do it now |
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375 | $can_touch = function_exists('touch'); |
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376 | foreach ($zip_files as $file) { |
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377 | $zip->unzip($zip_root.'/'.$file, $root.'/'.$file); |
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378 | if ($can_touch) { |
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379 | @touch($root.'/'.$file); |
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380 | } |
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381 | } |
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382 | @unlink($zip_file); |
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383 | } |
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384 | |
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385 | protected function getNewFiles($cur_digests,$new_digests) |
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386 | { |
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387 | $cur_md5 = $cur_path = $cur_digests; |
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388 | $new_md5 = $new_path = $new_digests; |
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389 | |
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390 | array_walk($cur_md5, array($this,'parseLine'),1); |
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391 | array_walk($cur_path,array($this,'parseLine'),2); |
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392 | array_walk($new_md5, array($this,'parseLine'),1); |
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393 | array_walk($new_path,array($this,'parseLine'),2); |
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394 | |
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395 | $cur = array_combine($cur_md5,$cur_path); |
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396 | $new = array_combine($new_md5,$new_path); |
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397 | |
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398 | return array_values(array_diff_key($new,$cur)); |
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399 | } |
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400 | |
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401 | protected function readVersion($str) |
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402 | { |
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403 | try |
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404 | { |
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405 | $xml = new SimpleXMLElement($str,LIBXML_NOERROR); |
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406 | $r = $xml->xpath("/versions/subject[@name='".$this->subject."']/release[@name='".$this->version."']"); |
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407 | |
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408 | if (!empty($r) && is_array($r)) |
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409 | { |
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410 | $r = $r[0]; |
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411 | $this->version_info['version'] = isset($r['version']) ? (string) $r['version'] : null; |
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412 | $this->version_info['href'] = isset($r['href']) ? (string) $r['href'] : null; |
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413 | $this->version_info['checksum'] = isset($r['checksum']) ? (string) $r['checksum'] : null; |
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414 | $this->version_info['info'] = isset($r['info']) ? (string) $r['info'] : null; |
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415 | } |
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416 | } |
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417 | catch (Exception $e) |
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418 | { |
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419 | throw $e; |
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420 | } |
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421 | } |
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422 | |
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423 | protected function md5sum($root,$digests_file) |
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424 | { |
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425 | if (!is_readable($digests_file)) { |
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426 | throw new Exception(__('Unable to read digests file.')); |
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427 | } |
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428 | |
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429 | $opts = FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES; |
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430 | $contents = file($digests_file,$opts); |
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431 | |
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432 | $changes = array(); |
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433 | |
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434 | foreach ($contents as $digest) |
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435 | { |
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436 | if (!preg_match('#^([\da-f]{32})\s+(.+?)$#',$digest,$m)) { |
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437 | continue; |
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438 | } |
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439 | |
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440 | $md5 = $m[1]; |
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441 | $filename = $root.'/'.$m[2]; |
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442 | |
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443 | # Invalid checksum |
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444 | if (!is_readable($filename) || !self::md5_check($filename, $md5)) { |
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445 | $changes[] = substr($m[2],2); |
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446 | } |
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447 | } |
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448 | |
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449 | # No checksum found in digests file |
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450 | if (empty($md5)) { |
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451 | throw new Exception(__('Invalid digests file.')); |
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452 | } |
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453 | |
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454 | return $changes; |
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455 | } |
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456 | |
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457 | protected function parseLine(&$v,$k,$n) |
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458 | { |
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459 | if (!preg_match('#^([\da-f]{32})\s+(.+?)$#',$v,$m)) { |
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460 | return; |
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461 | } |
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462 | |
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463 | $v = $n == 1 ? md5($m[2].$m[1]) : substr($m[2],2); |
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464 | } |
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465 | |
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466 | protected static function md5_check($filename,$md5) |
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467 | { |
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468 | if (md5_file($filename) == $md5) { |
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469 | return true; |
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470 | } else { |
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471 | $filecontent = file_get_contents($filename); |
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472 | $filecontent = str_replace ("\r\n","\n",$filecontent); |
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473 | $filecontent = str_replace ("\r","\n",$filecontent); |
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474 | if (md5($filecontent) == $md5) return true; |
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475 | } |
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476 | return false; |
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477 | } |
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478 | } |
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