| 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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