include/dba.php

   1 <?php
   2 require_once("dbm.php");
   3
   4 # if PDO is avaible for mysql, use the new database abstraction
   5 # TODO: PDO is disabled for release 3.3. We need to investigate why
   6 # the update from 3.2 fails with pdo
   7 /*
   8 if (class_exists('\PDO') && in_array('mysql', PDO::getAvailableDrivers())) {
   9   require_once("library/dddbl2/dddbl.php");
  10   require_once("include/dba_pdo.php");
  11 }
  12 */
  13
  14
  15 require_once('include/datetime.php');
  16
  17 /**
  18  * @class MySQL database class
  19  *
  20  * For debugging, insert 'dbg(1);' anywhere in the program flow.
  21  * dbg(0); will turn it off. Logging is performed at LOGGER_DATA level.
  22  * When logging, all binary info is converted to text and html entities are escaped so that
  23  * the debugging stream is safe to view within both terminals and web pages.
  24  *
  25  */
  26
  27 if (! class_exists('dba')) {
  28 class dba {
  29
  30         private $debug = 0;
  31         private $db;
  32         private $result;
  33         public  $mysqli = true;
  34         public  $connected = false;
  35         public  $error = false;
  36
  37         function __construct($server, $user, $pass, $db, $install = false) {
  38                 global $a;
  39
  40                 $stamp1 = microtime(true);
  41
  42                 $server = trim($server);
  43                 $user = trim($user);
  44                 $pass = trim($pass);
  45                 $db = trim($db);
  46
  47                 if (!(strlen($server) && strlen($user))) {
  48                         $this->connected = false;
  49                         $this->db = null;
  50                         return;
  51                 }
  52
  53                 if ($install) {
  54                         if (strlen($server) && ($server !== 'localhost') && ($server !== '127.0.0.1')) {
  55                                 if (! dns_get_record($server, DNS_A + DNS_CNAME + DNS_PTR)) {
  56                                         $this->error = sprintf( t('Cannot locate DNS info for database server \'%s\''), $server);
  57                                         $this->connected = false;
  58                                         $this->db = null;
  59                                         return;
  60                                 }
  61                         }
  62                 }
  63
  64                 if (class_exists('mysqli')) {
  65                         $this->db = @new mysqli($server,$user,$pass,$db);
  66                         if (! mysqli_connect_errno()) {
  67                                 $this->connected = true;
  68                         }
  69                         if (isset($a->config["system"]["db_charset"])) {
  70                                 $this->db->set_charset($a->config["system"]["db_charset"]);
  71                         }
  72                 } else {
  73                         $this->mysqli = false;
  74                         $this->db = mysql_connect($server,$user,$pass);
  75                         if ($this->db && mysql_select_db($db,$this->db)) {
  76                                 $this->connected = true;
  77                         }
  78                         if (isset($a->config["system"]["db_charset"]))
  79                                 mysql_set_charset($a->config["system"]["db_charset"], $this->db);
  80                 }
  81                 if (!$this->connected) {
  82                         $this->db = null;
  83                         if (!$install) {
  84                                 system_unavailable();
  85                         }
  86                 }
  87
  88                 $a->save_timestamp($stamp1, "network");
  89         }
  90
  91         public function getdb() {
  92                 return $this->db;
  93         }
  94
  95         /**
  96          * @brief Returns the MySQL server version string
  97          *
  98          * This function discriminate between the deprecated mysql API and the current
  99          * object-oriented mysqli API. Example of returned string: 5.5.46-0+deb8u1
 100          *
 101          * @return string
 102          */
 103         public function server_info() {
 104                 if ($this->mysqli) {
 105                         $return = $this->db->server_info;
 106                 } else {
 107                         $return = mysql_get_server_info($this->db);
 108                 }
 109                 return $return;
 110         }
 111
 112         /**
 113          * @brief Returns the number of rows
 114          *
 115          * @return integer
 116          */
 117         public function num_rows() {
 118                 if (!$this->result) {
 119                         return 0;
 120                 }
 121
 122                 if ($this->mysqli) {
 123                         $return = $this->result->num_rows;
 124                 } else {
 125                         $return = mysql_num_rows($this->result);
 126                 }
 127                 return $return;
 128         }
 129
 130         public function q($sql, $onlyquery = false) {
 131                 global $a;
 132
 133                 if (!$this->db || !$this->connected) {
 134                         return false;
 135                 }
 136
 137                 $this->error = '';
 138
 139                 // Check the connection (This can reconnect the connection - if configured)
 140                 if ($this->mysqli) {
 141                         $connected = $this->db->ping();
 142                 } else {
 143                         $connected = mysql_ping($this->db);
 144                 }
 145                 $connstr = ($connected ? "Connected" : "Disonnected");
 146
 147                 $stamp1 = microtime(true);
 148
 149                 $orig_sql = $sql;
 150
 151                 if (x($a->config,'system') && x($a->config['system'], 'db_callstack')) {
 152                         $sql = "/*".$a->callstack()." */ ".$sql;
 153                 }
 154
 155                 if ($this->mysqli) {
 156                         $result = @$this->db->query($sql);
 157                 } else {
 158                         $result = @mysql_query($sql,$this->db);
 159                 }
 160                 $stamp2 = microtime(true);
 161                 $duration = (float)($stamp2-$stamp1);
 162
 163                 $a->save_timestamp($stamp1, "database");
 164
 165                 if (strtolower(substr($orig_sql, 0, 6)) != "select") {
 166                         $a->save_timestamp($stamp1, "database_write");
 167                 }
 168                 if (x($a->config,'system') && x($a->config['system'],'db_log')) {
 169                         if (($duration > $a->config["system"]["db_loglimit"])) {
 170                                 $duration = round($duration, 3);
 171                                 $backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
 172                                 @file_put_contents($a->config["system"]["db_log"], datetime_convert()."\t".$duration."\t".
 173                                                 basename($backtrace[1]["file"])."\t".
 174                                                 $backtrace[1]["line"]."\t".$backtrace[2]["function"]."\t".
 175                                                 substr($sql, 0, 2000)."\n", FILE_APPEND);
 176                         }
 177                 }
 178
 179                 if ($this->mysqli) {
 180                         if ($this->db->errno) {
 181                                 $this->error = $this->db->error;
 182                                 $this->errorno = $this->db->errno;
 183                         }
 184                 } elseif (mysql_errno($this->db)) {
 185                         $this->error = mysql_error($this->db);
 186                         $this->errorno = mysql_errno($this->db);
 187                 }
 188
 189                 if (strlen($this->error)) {
 190                         logger('DB Error ('.$connstr.') '.$this->errorno.': '.$this->error);
 191                 }
 192
 193                 if ($this->debug) {
 194
 195                         $mesg = '';
 196
 197                         if ($result === false) {
 198                                 $mesg = 'false';
 199                         } elseif ($result === true) {
 200                                 $mesg = 'true';
 201                         } else {
 202                                 if ($this->mysqli) {
 203                                         $mesg = $result->num_rows . ' results' . EOL;
 204                                 } else {
 205                                         $mesg = mysql_num_rows($result) . ' results' . EOL;
 206                                 }
 207                         }
 208
 209                         $str =  'SQL = ' . printable($sql) . EOL . 'SQL returned ' . $mesg
 210                                 . (($this->error) ? ' error: ' . $this->error : '')
 211                                 . EOL;
 212
 213                         logger('dba: ' . $str );
 214                 }
 215
 216                 /**
 217                  * If dbfail.out exists, we will write any failed calls directly to it,
 218                  * regardless of any logging that may or may nor be in effect.
 219                  * These usually indicate SQL syntax errors that need to be resolved.
 220                  */
 221
 222                 if ($result === false) {
 223                         logger('dba: ' . printable($sql) . ' returned false.' . "\n" . $this->error);
 224                         if (file_exists('dbfail.out')) {
 225                                 file_put_contents('dbfail.out', datetime_convert() . "\n" . printable($sql) . ' returned false' . "\n" . $this->error . "\n", FILE_APPEND);
 226                         }
 227                 }
 228
 229                 if (($result === true) || ($result === false)) {
 230                         return $result;
 231                 }
 232                 if ($onlyquery) {
 233                         $this->result = $result;
 234                         return true;
 235                 }
 236
 237                 $r = array();
 238                 if ($this->mysqli) {
 239                         if ($result->num_rows) {
 240                                 while($x = $result->fetch_array(MYSQLI_ASSOC))
 241                                         $r[] = $x;
 242                                 $result->free_result();
 243                         }
 244                 } else {
 245                         if (mysql_num_rows($result)) {
 246                                 while($x = mysql_fetch_array($result, MYSQL_ASSOC))
 247                                         $r[] = $x;
 248                                 mysql_free_result($result);
 249                         }
 250                 }
 251
 252                 //$a->save_timestamp($stamp1, "database");
 253
 254                 if ($this->debug) {
 255                         logger('dba: ' . printable(print_r($r, true)));
 256                 }
 257                 return($r);
 258         }
 259
 260         public function qfetch() {
 261                 $x = false;
 262
 263                 if ($this->result) {
 264                         if ($this->mysqli) {
 265                                 if ($this->result->num_rows)
 266                                         $x = $this->result->fetch_array(MYSQLI_ASSOC);
 267                         } else {
 268                                 if (mysql_num_rows($this->result))
 269                                         $x = mysql_fetch_array($this->result, MYSQL_ASSOC);
 270                         }
 271                 }
 272                 return($x);
 273         }
 274
 275         public function qclose() {
 276                 if ($this->result) {
 277                         if ($this->mysqli) {
 278                                 $this->result->free_result();
 279                         } else {
 280                                 mysql_free_result($this->result);
 281                         }
 282                 }
 283         }
 284
 285         public function dbg($dbg) {
 286                 $this->debug = $dbg;
 287         }
 288
 289         public function escape($str) {
 290                 if ($this->db && $this->connected) {
 291                         if ($this->mysqli) {
 292                                 return @$this->db->real_escape_string($str);
 293                         } else {
 294                                 return @mysql_real_escape_string($str,$this->db);
 295                         }
 296                 }
 297         }
 298
 299         function connected() {
 300                 if ($this->mysqli) {
 301                         $connected = $this->db->ping();
 302                 } else {
 303                         $connected = mysql_ping($this->db);
 304                 }
 305                 return $connected;
 306         }
 307
 308         function __destruct() {
 309                 if ($this->db) {
 310                         if ($this->mysqli) {
 311                                 $this->db->close();
 312                         } else {
 313                                 mysql_close($this->db);
 314                         }
 315                 }
 316         }
 317 }}
 318
 319 if (! function_exists('printable')) {
 320 function printable($s) {
 321         $s = preg_replace("~([\x01-\x08\x0E-\x0F\x10-\x1F\x7F-\xFF])~",".", $s);
 322         $s = str_replace("\x00",'.',$s);
 323         if (x($_SERVER,'SERVER_NAME')) {
 324                 $s = escape_tags($s);
 325         }
 326         return $s;
 327 }}
 328
 329 // Procedural functions
 330 if (! function_exists('dbg')) {
 331 function dbg($state) {
 332         global $db;
 333         if ($db) {
 334                 $db->dbg($state);
 335         }
 336 }}
 337
 338 if (! function_exists('dbesc')) {
 339 function dbesc($str) {
 340         global $db;
 341         if ($db && $db->connected) {
 342                 return($db->escape($str));
 343         } else {
 344                 return(str_replace("'","\\'",$str));
 345         }
 346 }}
 347
 348
 349
 350 // Function: q($sql,$args);
 351 // Description: execute SQL query with printf style args.
 352 // Example: $r = q("SELECT * FROM `%s` WHERE `uid` = %d",
 353 //                   'user', 1);
 354
 355 if (! function_exists('q')) {
 356 function q($sql) {
 357
 358         global $db;
 359         $args = func_get_args();
 360         unset($args[0]);
 361
 362         if ($db && $db->connected) {
 363                 $stmt = @vsprintf($sql,$args); // Disabled warnings
 364                 //logger("dba: q: $stmt", LOGGER_ALL);
 365                 if ($stmt === false)
 366                         logger('dba: vsprintf error: ' . print_r(debug_backtrace(),true), LOGGER_DEBUG);
 367                 return $db->q($stmt);
 368         }
 369
 370         /**
 371          *
 372          * This will happen occasionally trying to store the
 373          * session data after abnormal program termination
 374          *
 375          */
 376         logger('dba: no database: ' . print_r($args,true));
 377         return false;
 378
 379 }}
 380
 381 /**
 382  * @brief Performs a query with "dirty reads"
 383  *
 384  * By doing dirty reads (reading uncommitted data) no locks are performed
 385  * This function can be used to fetch data that doesn't need to be reliable.
 386  *
 387  * @param $args Query parameters (1 to N parameters of different types)
 388  * @return array Query array
 389  */
 390 function qu($sql) {
 391
 392         global $db;
 393         $args = func_get_args();
 394         unset($args[0]);
 395
 396         if ($db && $db->connected) {
 397                 $stmt = @vsprintf($sql,$args); // Disabled warnings
 398                 if ($stmt === false)
 399                         logger('dba: vsprintf error: ' . print_r(debug_backtrace(),true), LOGGER_DEBUG);
 400                 $db->q("SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;");
 401                 $retval = $db->q($stmt);
 402                 $db->q("SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;");
 403                 return $retval;
 404         }
 405
 406         /**
 407          *
 408          * This will happen occasionally trying to store the
 409          * session data after abnormal program termination
 410          *
 411          */
 412         logger('dba: no database: ' . print_r($args,true));
 413         return false;
 414
 415 }
 416
 417 /**
 418  *
 419  * Raw db query, no arguments
 420  *
 421  */
 422
 423 if (! function_exists('dbq')) {
 424 function dbq($sql) {
 425
 426         global $db;
 427         if ($db && $db->connected) {
 428                 $ret = $db->q($sql);
 429         } else {
 430                 $ret = false;
 431         }
 432         return $ret;
 433 }}
 434
 435
 436 // Caller is responsible for ensuring that any integer arguments to
 437 // dbesc_array are actually integers and not malformed strings containing
 438 // SQL injection vectors. All integer array elements should be specifically
 439 // cast to int to avoid trouble.
 440
 441
 442 if (! function_exists('dbesc_array_cb')) {
 443 function dbesc_array_cb(&$item, $key) {
 444         if (is_string($item))
 445                 $item = dbesc($item);
 446 }}
 447
 448
 449 if (! function_exists('dbesc_array')) {
 450 function dbesc_array(&$arr) {
 451         if (is_array($arr) && count($arr)) {
 452                 array_walk($arr,'dbesc_array_cb');
 453         }
 454 }}
 455
 456
 457 function dba_timer() {
 458         return microtime(true);
 459 }