1 | <?php |
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2 | // +----------------------------------------------------------------------+ |
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3 | // | PHP version 5 | |
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4 | // +----------------------------------------------------------------------+ |
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5 | // | Copyright (c) 2002-2006 James Heinrich, Allan Hansen | |
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6 | // +----------------------------------------------------------------------+ |
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7 | // | This source file is subject to version 2 of the GPL license, | |
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8 | // | that is bundled with this package in the file license.txt and is | |
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9 | // | available through the world-wide-web at the following url: | |
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10 | // | http://www.gnu.org/copyleft/gpl.html | |
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11 | // +----------------------------------------------------------------------+ |
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12 | // | getID3() - http://getid3.sourceforge.net or http://www.getid3.org | |
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13 | // +----------------------------------------------------------------------+ |
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14 | // | Authors: James Heinrich <infoØgetid3*org> | |
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15 | // | Allan Hansen <ahØartemis*dk> | |
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16 | // +----------------------------------------------------------------------+ |
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17 | // | extension.cache.mysql.php | |
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18 | // | MySQL Cache Extension. | |
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19 | // | dependencies: getid3. | |
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20 | // +----------------------------------------------------------------------+ |
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21 | // |
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22 | // $Id: extension.cache.mysql.php 3318 2009-05-20 21:54:10Z vdigital $ |
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23 | |
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24 | |
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25 | /** |
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26 | * This is a caching extension for getID3(). It works the exact same |
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27 | * way as the getID3 class, but return cached information very fast |
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28 | * |
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29 | * Example: (see also demo.cache.mysql.php in /demo/) |
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30 | * |
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31 | * Normal getID3 usage (example): |
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32 | * |
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33 | * require_once 'getid3/getid3.php'; |
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34 | * $getid3 = new getid3; |
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35 | * $getid3->encoding = 'UTF-8'; |
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36 | * try { |
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37 | * $info1 = $getid3->Analyse('file1.flac'); |
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38 | * $info2 = $getid3->Analyse('file2.wv'); |
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39 | * .... |
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40 | * |
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41 | * getID3_cached usage: |
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42 | * |
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43 | * require_once 'getid3/getid3.php'; |
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44 | * require_once 'getid3/getid3/extension.cache.mysql.php'; |
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45 | * $getid3 = new getid3_cached_mysql('localhost', 'database', 'username', 'password'); |
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46 | * $getid3->encoding = 'UTF-8'; |
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47 | * try { |
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48 | * $info1 = $getid3->analyse('file1.flac'); |
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49 | * $info2 = $getid3->analyse('file2.wv'); |
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50 | * ... |
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51 | * |
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52 | * |
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53 | * Supported Cache Types (this extension) |
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54 | * |
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55 | * SQL Databases: |
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56 | * |
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57 | * cache_type cache_options |
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58 | * ------------------------------------------------------------------- |
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59 | * mysql host, database, username, password |
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60 | * |
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61 | * |
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62 | * DBM-Style Databases: (use extension.cache.dbm) |
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63 | * |
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64 | * cache_type cache_options |
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65 | * ------------------------------------------------------------------- |
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66 | * gdbm dbm_filename, lock_filename |
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67 | * ndbm dbm_filename, lock_filename |
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68 | * db2 dbm_filename, lock_filename |
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69 | * db3 dbm_filename, lock_filename |
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70 | * db4 dbm_filename, lock_filename (PHP5 required) |
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71 | * |
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72 | * PHP must have write access to both dbm_filename and lock_filename. |
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73 | * |
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74 | * |
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75 | * Recommended Cache Types |
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76 | * |
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77 | * Infrequent updates, many reads any DBM |
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78 | * Frequent updates mysql |
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79 | */ |
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80 | |
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81 | |
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82 | class getid3_cached_mysql extends getID3 |
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83 | { |
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84 | |
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85 | private $cursor; |
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86 | private $connection; |
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87 | |
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88 | |
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89 | public function __construct($host, $database, $username, $password) { |
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90 | |
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91 | // Check for mysql support |
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92 | if (!function_exists('mysql_pconnect')) { |
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93 | throw new getid3_exception('PHP not compiled with mysql support.'); |
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94 | } |
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95 | |
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96 | // Connect to database |
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97 | $this->connection = @mysql_pconnect($host, $username, $password); |
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98 | if (!$this->connection) { |
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99 | throw new getid3_exception('mysql_pconnect() failed - check permissions and spelling.'); |
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100 | } |
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101 | |
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102 | // Select database |
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103 | if (!@mysql_select_db($database, $this->connection)) { |
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104 | throw new getid3_exception('Cannot use database '.$database); |
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105 | } |
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106 | |
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107 | // Create cache table if not exists |
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108 | $this->create_table(); |
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109 | |
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110 | // Check version number and clear cache if changed |
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111 | $this->cursor = mysql_query("SELECT `value` FROM `getid3_cache` WHERE (`filename` = '".getid3::VERSION."') AND (`filesize` = '-1') AND (`filetime` = '-1') AND (`analyzetime` = '-1')", $this->connection); |
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112 | list($version) = @mysql_fetch_array($this->cursor); |
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113 | if ($version != getid3::VERSION) { |
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114 | $this->clear_cache(); |
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115 | } |
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116 | |
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117 | parent::__construct(); |
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118 | } |
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119 | |
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120 | |
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121 | |
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122 | public function clear_cache() { |
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123 | |
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124 | $this->cursor = mysql_query("DELETE FROM `getid3_cache`", $this->connection); |
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125 | $this->cursor = mysql_query("INSERT INTO `getid3_cache` VALUES ('".getid3::VERSION."', -1, -1, -1, '".getid3::VERSION."')", $this->connection); |
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126 | } |
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127 | |
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128 | |
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129 | |
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130 | public function Analyze($filename) { |
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131 | |
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132 | if (file_exists($filename)) { |
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133 | |
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134 | // Short-hands |
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135 | $filetime = filemtime($filename); |
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136 | $filesize = filesize($filename); |
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137 | $filenam2 = mysql_escape_string($filename); |
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138 | |
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139 | // Loopup file |
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140 | $this->cursor = mysql_query("SELECT `value` FROM `getid3_cache` WHERE (`filename`='".$filenam2."') AND (`filesize`='".$filesize."') AND (`filetime`='".$filetime."')", $this->connection); |
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141 | list($result) = @mysql_fetch_array($this->cursor); |
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142 | |
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143 | // Hit |
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144 | if ($result) { |
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145 | return unserialize($result); |
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146 | } |
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147 | } |
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148 | |
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149 | // Miss |
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150 | $result = parent::Analyze($filename); |
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151 | |
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152 | // Save result |
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153 | if (file_exists($filename)) { |
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154 | $res2 = mysql_escape_string(serialize($result)); |
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155 | $this->cursor = mysql_query("INSERT INTO `getid3_cache` (`filename`, `filesize`, `filetime`, `analyzetime`, `value`) VALUES ('".$filenam2."', '".$filesize."', '".$filetime."', '".time()."', '".$res2."')", $this->connection); |
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156 | } |
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157 | return $result; |
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158 | } |
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159 | |
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160 | |
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161 | |
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162 | // (re)create sql table |
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163 | private function create_table($drop = false) { |
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164 | |
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165 | $this->cursor = mysql_query("CREATE TABLE IF NOT EXISTS `getid3_cache` ( |
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166 | `filename` VARCHAR(255) NOT NULL DEFAULT '', |
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167 | `filesize` INT(11) NOT NULL DEFAULT '0', |
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168 | `filetime` INT(11) NOT NULL DEFAULT '0', |
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169 | `analyzetime` INT(11) NOT NULL DEFAULT '0', |
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170 | `value` TEXT NOT NULL, |
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171 | PRIMARY KEY (`filename`,`filesize`,`filetime`)) TYPE=MyISAM", $this->connection); |
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172 | echo mysql_error($this->connection); |
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173 | } |
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174 | } |
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175 | |
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176 | |
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177 | ?> |
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