1<?php
2
3/////////////////////////////////////////////////////////////////
4/// getID3() by James Heinrich <info@getid3.org>               //
5//  available at https://github.com/JamesHeinrich/getID3       //
6//            or https://www.getid3.org                        //
7//            or http://getid3.sourceforge.net                 //
8//                                                             //
9// extension.cache.mysqli.php - part of getID3()               //
10// Please see readme.txt for more information                  //
11//                                                             //
12/////////////////////////////////////////////////////////////////
13//                                                             //
14// This extension written by Allan Hansen <ahØartemis*dk>      //
15// Table name mod by Carlo Capocasa <calroØcarlocapocasa*com>  //
16//                                                            ///
17/////////////////////////////////////////////////////////////////
18
19
20/**
21* This is a caching extension for getID3(). It works the exact same
22* way as the getID3 class, but return cached information very fast
23*
24* Example:  (see also demo.cache.mysql.php in /demo/)
25*
26*    Normal getID3 usage (example):
27*
28*       require_once 'getid3/getid3.php';
29*       $getID3 = new getID3;
30*       $getID3->encoding = 'UTF-8';
31*       $info1 = $getID3->analyze('file1.flac');
32*       $info2 = $getID3->analyze('file2.wv');
33*
34*    getID3_cached usage:
35*
36*       require_once 'getid3/getid3.php';
37*       require_once 'getid3/getid3/extension.cache.mysqli.php';
38*       // 5th parameter (tablename) is optional, default is 'getid3_cache'
39*       $getID3 = new getID3_cached_mysqli('localhost', 'database', 'username', 'password', 'tablename');
40*       $getID3->encoding = 'UTF-8';
41*       $info1 = $getID3->analyze('file1.flac');
42*       $info2 = $getID3->analyze('file2.wv');
43*
44*
45* Supported Cache Types    (this extension)
46*
47*   SQL Databases:
48*
49*   cache_type          cache_options
50*   -------------------------------------------------------------------
51*   mysqli              host, database, username, password
52*
53*
54*   DBM-Style Databases:    (use extension.cache.dbm)
55*
56*   cache_type          cache_options
57*   -------------------------------------------------------------------
58*   gdbm                dbm_filename, lock_filename
59*   ndbm                dbm_filename, lock_filename
60*   db2                 dbm_filename, lock_filename
61*   db3                 dbm_filename, lock_filename
62*   db4                 dbm_filename, lock_filename  (PHP5 required)
63*
64*   PHP must have write access to both dbm_filename and lock_filename.
65*
66*
67* Recommended Cache Types
68*
69*   Infrequent updates, many reads      any DBM
70*   Frequent updates                    mysqli
71*/
72
73class getID3_cached_mysqli extends getID3
74{
75	/**
76	 * @var mysqli
77	 */
78	private $mysqli;
79
80	/**
81	 * @var mysqli_result
82	 */
83	private $cursor;
84
85	/**
86	 * @var string
87	 */
88	private $table;
89
90	/**
91	 * @var bool
92	 */
93	private $db_structure_check;
94
95
96	/**
97	 * constructor - see top of this file for cache type and cache_options
98	 *
99	 * @param string $host
100	 * @param string $database
101	 * @param string $username
102	 * @param string $password
103	 * @param string $table
104	 *
105	 * @throws Exception
106	 * @throws getid3_exception
107	 */
108	public function __construct($host, $database, $username, $password, $table='getid3_cache') {
109
110		// Check for mysqli support
111		if (!function_exists('mysqli_connect')) {
112			throw new Exception('PHP not compiled with mysqli support.');
113		}
114
115		// Connect to database
116		$this->mysqli = new mysqli($host, $username, $password);
117		if ($this->mysqli->connect_error) {
118			throw new Exception('Connect Error (' . $this->mysqli->connect_errno . ') ' . $this->mysqli->connect_error);
119		}
120
121		// Select database
122		if (!$this->mysqli->select_db($database)) {
123			throw new Exception('Cannot use database '.$database);
124		}
125
126		// Set table
127		$this->table = $table;
128
129		// Create cache table if not exists
130		$this->create_table();
131
132		$this->db_structure_check = true; // set to false if you know your table structure has already been migrated to use `hash` as the primary key to avoid
133		$this->migrate_db_structure();
134
135		// Check version number and clear cache if changed
136		$version = '';
137		$SQLquery  = 'SELECT `value`';
138		$SQLquery .= ' FROM `'.$this->mysqli->real_escape_string($this->table).'`';
139		$SQLquery .= ' WHERE (`filename` = \''.$this->mysqli->real_escape_string(getID3::VERSION).'\')';
140		$SQLquery .= ' AND (`hash` = \'getID3::VERSION\')';
141		if ($this->cursor = $this->mysqli->query($SQLquery)) {
142			list($version) = $this->cursor->fetch_array();
143		}
144		if ($version != getID3::VERSION) {
145			$this->clear_cache();
146		}
147
148		parent::__construct();
149	}
150
151
152	/**
153	 * clear cache
154	 */
155	public function clear_cache() {
156		$this->mysqli->query('TRUNCATE TABLE `'.$this->mysqli->real_escape_string($this->table).'`');
157		$this->mysqli->query('INSERT INTO `'.$this->mysqli->real_escape_string($this->table).'` (`hash`, `filename`, `filesize`, `filetime`, `analyzetime`, `value`) VALUES (\'getID3::VERSION\', \''.getID3::VERSION.'\', -1, -1, -1, \''.getID3::VERSION.'\')');
158	}
159
160
161	/**
162	 * migrate database structure if needed
163	 */
164	public function migrate_db_structure() {
165		// Check for table structure
166		if ($this->db_structure_check) {
167			$SQLquery  = 'SHOW COLUMNS';
168			$SQLquery .= ' FROM `'.$this->mysqli->real_escape_string($this->table).'`';
169			$SQLquery .= ' LIKE \'hash\'';
170			$this->cursor = $this->mysqli->query($SQLquery);
171			if ($this->cursor->num_rows == 0) {
172				// table has not been migrated, add column, add hashes, change index
173				$SQLquery  = 'ALTER TABLE `getid3_cache` DROP PRIMARY KEY, ADD `hash` CHAR(32) NOT NULL DEFAULT \'\' FIRST, ADD PRIMARY KEY(`hash`)';
174				$this->mysqli->query($SQLquery);
175
176				$SQLquery  = 'UPDATE `getid3_cache` SET';
177				$SQLquery .= ' `hash` = MD5(`filename`, `filesize`, `filetime`)';
178				$SQLquery .= ' WHERE (`filesize` > -1)';
179				$this->mysqli->query($SQLquery);
180
181				$SQLquery  = 'UPDATE `getid3_cache` SET';
182				$SQLquery .= ' `hash` = \'getID3::VERSION\'';
183				$SQLquery .= ' WHERE (`filesize` = -1)';
184				$SQLquery .= '   AND (`filetime` = -1)';
185				$SQLquery .= '   AND (`filetime` = -1)';
186				$this->mysqli->query($SQLquery);
187			}
188		}
189	}
190
191
192	/**
193	 * analyze file
194	 *
195	 * @param string   $filename
196	 * @param int      $filesize
197	 * @param string   $original_filename
198	 * @param resource $fp
199	 *
200	 * @return mixed
201	 */
202	public function analyze($filename, $filesize=null, $original_filename='', $fp=null) {
203
204		$filetime = 0;
205		if (file_exists($filename)) {
206
207			// Short-hands
208			$filetime = filemtime($filename);
209			$filesize =  filesize($filename);
210
211			// Lookup file
212			$SQLquery  = 'SELECT `value`';
213			$SQLquery .= ' FROM `'.$this->mysqli->real_escape_string($this->table).'`';
214			$SQLquery .= ' WHERE (`hash` = \''.$this->mysqli->real_escape_string(md5($filename.$filesize.$filetime)).'\')';
215			$this->cursor = $this->mysqli->query($SQLquery);
216			if ($this->cursor->num_rows > 0) {
217				// Hit
218				list($result) = $this->cursor->fetch_array();
219				return unserialize(base64_decode($result));
220			}
221		}
222
223		// Miss
224		$analysis = parent::analyze($filename, $filesize, $original_filename, $fp);
225
226		// Save result
227		if (file_exists($filename)) {
228			$SQLquery  = 'INSERT INTO `'.$this->mysqli->real_escape_string($this->table).'` (`hash`, `filename`, `filesize`, `filetime`, `analyzetime`, `value`) VALUES (';
229			$SQLquery .=   '\''.$this->mysqli->real_escape_string(md5($filename.$filesize.$filetime)).'\'';
230			$SQLquery .= ', \''.$this->mysqli->real_escape_string($filename).'\'';
231			$SQLquery .= ', \''.$this->mysqli->real_escape_string($filesize).'\'';
232			$SQLquery .= ', \''.$this->mysqli->real_escape_string($filetime).'\'';
233			$SQLquery .= ', UNIX_TIMESTAMP()';
234			$SQLquery .= ', \''.$this->mysqli->real_escape_string(base64_encode(serialize($analysis))).'\'';
235			$SQLquery .= ')';
236			$this->cursor = $this->mysqli->query($SQLquery);
237		}
238		return $analysis;
239	}
240
241
242	/**
243	 * (re)create mysqli table
244	 *
245	 * @param bool $drop
246	 */
247	private function create_table($drop=false) {
248		if ($drop) {
249			$SQLquery  = 'DROP TABLE IF EXISTS `'.$this->mysqli->real_escape_string($this->table).'`';
250			$this->mysqli->query($SQLquery);
251		}
252		$SQLquery  = 'CREATE TABLE IF NOT EXISTS `'.$this->mysqli->real_escape_string($this->table).'` (';
253		$SQLquery .=   '`hash` CHAR(32) NOT NULL DEFAULT \'\'';
254		$SQLquery .= ', `filename` VARCHAR(1000) NOT NULL DEFAULT \'\'';
255		$SQLquery .= ', `filesize` INT(11) NOT NULL DEFAULT \'0\'';
256		$SQLquery .= ', `filetime` INT(11) NOT NULL DEFAULT \'0\'';
257		$SQLquery .= ', `analyzetime` INT(11) NOT NULL DEFAULT \'0\'';
258		$SQLquery .= ', `value` LONGTEXT NOT NULL';
259		$SQLquery .= ', PRIMARY KEY (`hash`))';
260		$this->cursor = $this->mysqli->query($SQLquery);
261		echo $this->mysqli->error;
262	}
263}
264