includes/installer/MysqlInstaller.php

   1 <?php
   2 /**
   3  * MySQL-specific installer.
   4  *
   5  * @file
   6  * @ingroup Deployment
   7  */
   8
   9 /**
  10  * Class for setting up the MediaWiki database using MySQL.
  11  *
  12  * @ingroup Deployment
  13  * @since 1.17
  14  */
  15 class MysqlInstaller extends DatabaseInstaller {
  16
  17         protected $globalNames = array(
  18                 'wgDBserver',
  19                 'wgDBname',
  20                 'wgDBuser',
  21                 'wgDBpassword',
  22                 'wgDBprefix',
  23                 'wgDBTableOptions',
  24                 'wgDBmysql5',
  25         );
  26
  27         protected $internalDefaults = array(
  28                 '_MysqlEngine' => 'InnoDB',
  29                 '_MysqlCharset' => 'binary',
  30         );
  31
  32         public $supportedEngines = array( 'InnoDB', 'MyISAM' );
  33
  34         public $minimumVersion = '4.0.14';
  35
  36         public $webUserPrivs = array(
  37                 'DELETE',
  38                 'INSERT',
  39                 'SELECT',
  40                 'UPDATE',
  41                 'CREATE TEMPORARY TABLES',
  42         );
  43
  44         public function getName() {
  45                 return 'mysql';
  46         }
  47
  48         public function __construct( $parent ) {
  49                 parent::__construct( $parent );
  50         }
  51
  52         public function isCompiled() {
  53                 return self::checkExtension( 'mysql' );
  54         }
  55
  56         public function getGlobalDefaults() {
  57                 return array();
  58         }
  59
  60         public function getConnectForm() {
  61                 return
  62                         $this->getTextBox( 'wgDBserver', 'config-db-host' ) .
  63                         $this->parent->getHelpBox( 'config-db-host-help' ) .
  64                         Xml::openElement( 'fieldset' ) .
  65                         Xml::element( 'legend', array(), wfMsg( 'config-db-wiki-settings' ) ) .
  66                         $this->getTextBox( 'wgDBname', 'config-db-name' ) .
  67                         $this->parent->getHelpBox( 'config-db-name-help' ) .
  68                         $this->getTextBox( 'wgDBprefix', 'config-db-prefix' ) .
  69                         $this->parent->getHelpBox( 'config-db-prefix-help' ) .
  70                         Xml::closeElement( 'fieldset' ) .
  71                         $this->getInstallUserBox();
  72         }
  73
  74         public function submitConnectForm() {
  75                 // Get variables from the request.
  76                 $newValues = $this->setVarsFromRequest( array( 'wgDBserver', 'wgDBname', 'wgDBprefix' ) );
  77
  78                 // Validate them.
  79                 $status = Status::newGood();
  80                 if ( !strlen( $newValues['wgDBname'] ) ) {
  81                         $status->fatal( 'config-missing-db-name' );
  82                 } elseif ( !preg_match( '/^[a-zA-Z0-9_]+$/', $newValues['wgDBname'] ) ) {
  83                         $status->fatal( 'config-invalid-db-name', $newValues['wgDBname'] );
  84                 }
  85                 if ( !preg_match( '/^[a-zA-Z0-9_]*$/', $newValues['wgDBprefix'] ) ) {
  86                         $status->fatal( 'config-invalid-db-prefix', $newValues['wgDBprefix'] );
  87                 }
  88                 if ( !$status->isOK() ) {
  89                         return $status;
  90                 }
  91
  92                 // Submit user box
  93                 $status = $this->submitInstallUserBox();
  94                 if ( !$status->isOK() ) {
  95                         return $status;
  96                 }
  97
  98                 // Try to connect
  99                 $status = $this->getConnection();
 100                 if ( !$status->isOK() ) {
 101                         return $status;
 102                 }
 103                 $conn = $status->value;
 104
 105                 // Check version
 106                 $version = $conn->getServerVersion();
 107                 if ( version_compare( $version, $this->minimumVersion ) < 0 ) {
 108                         return Status::newFatal( 'config-mysql-old', $this->minimumVersion, $version );
 109                 }
 110
 111                 return $status;
 112         }
 113
 114         public function getConnection() {
 115                 $status = Status::newGood();
 116                 try {
 117                         $this->db = new DatabaseMysql(
 118                                 $this->getVar( 'wgDBserver' ),
 119                                 $this->getVar( '_InstallUser' ),
 120                                 $this->getVar( '_InstallPassword' ),
 121                                 false,
 122                                 false,
 123                                 0,
 124                                 $this->getVar( 'wgDBprefix' )
 125                         );
 126                         $status->value = $this->db;
 127                 } catch ( DBConnectionError $e ) {
 128                         $status->fatal( 'config-connection-error', $e->getMessage() );
 129                 }
 130                 return $status;
 131         }
 132
 133         public function preUpgrade() {
 134                 global $wgDBuser, $wgDBpassword;
 135
 136                 $status = $this->getConnection();
 137                 if ( !$status->isOK() ) {
 138                         $this->parent->showStatusError( $status );
 139                         return;
 140                 }
 141                 $conn = $status->value;
 142                 $conn->selectDB( $this->getVar( 'wgDBname' ) );
 143
 144                 # Determine existing default character set
 145                 if ( $conn->tableExists( "revision" ) ) {
 146                         $revision = $conn->escapeLike( $this->getVar( 'wgDBprefix' ) . 'revision' );
 147                         $res = $conn->query( "SHOW TABLE STATUS LIKE '$revision'" );
 148                         $row = $conn->fetchObject( $res );
 149                         if ( !$row ) {
 150                                 $this->parent->showMessage( 'config-show-table-status' );
 151                                 $existingSchema = false;
 152                                 $existingEngine = false;
 153                         } else {
 154                                 if ( preg_match( '/^latin1/', $row->Collation ) ) {
 155                                         $existingSchema = 'mysql4';
 156                                 } elseif ( preg_match( '/^utf8/', $row->Collation ) ) {
 157                                         $existingSchema = 'mysql5';
 158                                 } elseif ( preg_match( '/^binary/', $row->Collation ) ) {
 159                                         $existingSchema = 'mysql5-binary';
 160                                 } else {
 161                                         $existingSchema = false;
 162                                         $this->parent->showMessage( 'config-unknown-collation' );
 163                                 }
 164                                 if ( isset( $row->Engine ) ) {
 165                                         $existingEngine = $row->Engine;
 166                                 } else {
 167                                         $existingEngine = $row->Type;
 168                                 }
 169                         }
 170                 } else {
 171                         $existingSchema = false;
 172                         $existingEngine = false;
 173                 }
 174
 175                 if ( $existingSchema && $existingSchema != $this->getVar( '_MysqlCharset' ) ) {
 176                         $this->parent->showMessage( 'config-mysql-charset-mismatch', $this->getVar( '_MysqlCharset' ), $existingSchema );
 177                         $this->setVar( '_MysqlCharset', $existingSchema );
 178                 }
 179                 if ( $existingEngine && $existingEngine != $this->getVar( '_MysqlEngine' ) ) {
 180                         $this->parent->showMessage( 'config-mysql-egine-mismatch', $this->getVar( '_MysqlEngine' ), $existingEngine );
 181                         $this->setVar( '_MysqlEngine', $existingEngine );
 182                 }
 183
 184                 # Normal user and password are selected after this step, so for now
 185                 # just copy these two
 186                 $wgDBuser = $this->getVar( '_InstallUser' );
 187                 $wgDBpassword = $this->getVar( '_InstallPassword' );
 188         }
 189
 190         /**
 191          * Get a list of storage engines that are available and supported
 192          */
 193         public function getEngines() {
 194                 $engines = array( 'InnoDB', 'MyISAM' );
 195                 $status = $this->getConnection();
 196                 if ( !$status->isOK() ) {
 197                         return $engines;
 198                 }
 199                 $conn = $status->value;
 200
 201                 $version = $conn->getServerVersion();
 202                 if ( version_compare( $version, "4.1.2", "<" ) ) {
 203                         // No SHOW ENGINES in this version
 204                         return $engines;
 205                 }
 206
 207                 $engines = array();
 208                 $res = $conn->query( 'SHOW ENGINES' );
 209                 foreach ( $res as $row ) {
 210                         if ( $row->Support == 'YES' || $row->Support == 'DEFAULT' ) {
 211                                 $engines[] = $row->Engine;
 212                         }
 213                 }
 214                 $engines = array_intersect( $this->supportedEngines, $engines );
 215                 return $engines;
 216         }
 217
 218         /**
 219          * Get a list of character sets that are available and supported
 220          */
 221         public function getCharsets() {
 222                 $status = $this->getConnection();
 223                 $mysql5 = array( 'binary', 'utf8' );
 224                 $mysql4 = array( 'mysql4' );
 225                 if ( !$status->isOK() ) {
 226                         return $mysql5;
 227                 }
 228                 if ( version_compare( $status->value->getServerVersion(), '4.1.0', '>=' ) ) {
 229                         return $mysql5;
 230                 }
 231                 return $mysql4;
 232         }
 233
 234         /**
 235          * Return true if the install user can create accounts
 236          */
 237         public function canCreateAccounts() {
 238                 $status = $this->getConnection();
 239                 if ( !$status->isOK() ) {
 240                         return false;
 241                 }
 242                 $conn = $status->value;
 243
 244                 // Check version, need INFORMATION_SCHEMA and CREATE USER
 245                 if ( version_compare( $conn->getServerVersion(), '5.0.2', '<' ) ) {
 246                         return false;
 247                 }
 248
 249                 // Get current account name
 250                 $currentName = $conn->selectField( '', 'CURRENT_USER()', '', __METHOD__ );
 251                 $parts = explode( '@', $currentName );
 252                 if ( count( $parts ) != 2 ) {
 253                         return false;
 254                 }
 255                 $quotedUser = $conn->addQuotes( $parts[0] ) .
 256                         '@' . $conn->addQuotes( $parts[1] );
 257
 258                 // The user needs to have INSERT on mysql.* to be able to CREATE USER
 259                 // The grantee will be double-quoted in this query, as required
 260                 $res = $conn->select( 'INFORMATION_SCHEMA.USER_PRIVILEGES', '*',
 261                         array( 'GRANTEE' => $quotedUser ), __METHOD__ );
 262                 $insertMysql = false;
 263                 $grantOptions = array_flip( $this->webUserPrivs );
 264                 foreach ( $res as $row ) {
 265                         if ( $row->PRIVILEGE_TYPE == 'INSERT' ) {
 266                                 $insertMysql = true;
 267                         }
 268                         if ( $row->IS_GRANTABLE ) {
 269                                 unset( $grantOptions[$row->PRIVILEGE_TYPE] );
 270                         }
 271                 }
 272
 273                 // Check for DB-specific privs for mysql.*
 274                 if ( !$insertMysql ) {
 275                         $row = $conn->selectRow( 'INFORMATION_SCHEMA.SCHEMA_PRIVILEGES', '*',
 276                                 array(
 277                                         'GRANTEE' => $quotedUser,
 278                                         'TABLE_SCHEMA' => 'mysql',
 279                                         'PRIVILEGE_TYPE' => 'INSERT',
 280                                 ), __METHOD__ );
 281                         if ( $row ) {
 282                                 $insertMysql = true;
 283                         }
 284                 }
 285
 286                 if ( !$insertMysql ) {
 287                         return false;
 288                 }
 289
 290                 // Check for DB-level grant options
 291                 $res = $conn->select( 'INFORMATION_SCHEMA.SCHEMA_PRIVILEGES', '*',
 292                         array(
 293                                 'GRANTEE' => $quotedUser,
 294                                 'IS_GRANTABLE' => 1,
 295                         ), __METHOD__ );
 296                 foreach ( $res as $row ) {
 297                         $regex = $conn->likeToRegex( $row->TABLE_SCHEMA );
 298                         if ( preg_match( $regex, $this->getVar( 'wgDBname' ) ) ) {
 299                                 unset( $grantOptions[$row->PRIVILEGE_TYPE] );
 300                         }
 301                 }
 302                 if ( count( $grantOptions ) ) {
 303                         // Can't grant everything
 304                         return false;
 305                 }
 306                 return true;
 307         }
 308
 309         public function getSettingsForm() {
 310                 if ( $this->canCreateAccounts() ) {
 311                         $noCreateMsg = false;
 312                 } else {
 313                         $noCreateMsg = 'config-db-web-no-create-privs';
 314                 }
 315                 $s = $this->getWebUserBox( $noCreateMsg );
 316
 317                 // Do engine selector
 318                 $engines = $this->getEngines();
 319                 // If the current default engine is not supported, use an engine that is
 320                 if ( !in_array( $this->getVar( '_MysqlEngine' ), $engines ) ) {
 321                         $this->setVar( '_MysqlEngine', reset( $engines ) );
 322                 }
 323                 if ( count( $engines ) >= 2 ) {
 324                         $s .= $this->getRadioSet( array(
 325                                 'var' => '_MysqlEngine',
 326                                 'label' => 'config-mysql-engine',
 327                                 'itemLabelPrefix' => 'config-mysql-',
 328                                 'values' => $engines
 329                         ));
 330                         $s .= $this->parent->getHelpBox( 'config-mysql-engine-help' );
 331                 }
 332
 333                 // If the current default charset is not supported, use a charset that is
 334                 $charsets = $this->getCharsets();
 335                 if ( !in_array( $this->getVar( '_MysqlCharset' ), $charsets ) ) {
 336                         $this->setVar( '_MysqlCharset', reset( $charsets ) );
 337                 }
 338
 339                 // Do charset selector
 340                 if ( count( $charsets ) >= 2 ) {
 341                         $s .= $this->getRadioSet( array(
 342                                 'var' => '_MysqlCharset',
 343                                 'label' => 'config-mysql-charset',
 344                                 'itemLabelPrefix' => 'config-mysql-',
 345                                 'values' => $charsets
 346                         ));
 347                         $s .= $this->parent->getHelpBox( 'config-mysql-charset-help' );
 348                 }
 349
 350                 return $s;
 351         }
 352
 353         public function submitSettingsForm() {
 354                 $newValues = $this->setVarsFromRequest( array( '_MysqlEngine', '_MysqlCharset' ) );
 355                 $status = $this->submitWebUserBox();
 356                 if ( !$status->isOK() ) {
 357                         return $status;
 358                 }
 359
 360                 // Validate the create checkbox
 361                 $canCreate = $this->canCreateAccounts();
 362                 if ( !$canCreate ) {
 363                         $this->setVar( '_CreateDBAccount', false );
 364                         $create = false;
 365                 } else {
 366                         $create = $this->getVar( '_CreateDBAccount' );
 367                 }
 368
 369                 if ( !$create ) {
 370                         // Test the web account
 371                         try {
 372                                 $webConn = new Database(
 373                                         $this->getVar( 'wgDBserver' ),
 374                                         $this->getVar( 'wgDBuser' ),
 375                                         $this->getVar( 'wgDBpassword' ),
 376                                         false,
 377                                         false,
 378                                         0,
 379                                         $this->getVar( 'wgDBprefix' )
 380                                 );
 381                         } catch ( DBConnectionError $e ) {
 382                                 return Status::newFatal( 'config-connection-error', $e->getMessage() );
 383                         }
 384                 }
 385
 386                 // Validate engines and charsets
 387                 // This is done pre-submit already so it's just for security
 388                 $engines = $this->getEngines();
 389                 if ( !in_array( $this->getVar( '_MysqlEngine' ), $engines ) ) {
 390                         $this->setVar( '_MysqlEngine', reset( $engines ) );
 391                 }
 392                 $charsets = $this->getCharsets();
 393                 if ( !in_array( $this->getVar( '_MysqlCharset' ), $charsets ) ) {
 394                         $this->setVar( '_MysqlCharset', reset( $charsets ) );
 395                 }
 396                 return Status::newGood();
 397         }
 398
 399         public function preInstall() {
 400                 # Add our user callback to installSteps, right before the tables are created.
 401                 $callback = array(
 402                         array(
 403                                 'name' => 'user',
 404                                 'callback' => array( $this, 'setupUser' ),
 405                         )
 406                 );
 407                 $this->parent->addInstallStepFollowing( "tables", $callback );
 408         }
 409
 410         public function setupDatabase() {
 411                 $status = $this->getConnection();
 412                 if ( !$status->isOK() ) {
 413                         return $status;
 414                 }
 415                 $conn = $status->value;
 416                 $dbName = $this->getVar( 'wgDBname' );
 417                 if( !$conn->selectDB( $dbName ) ) {
 418                         $conn->query( "CREATE DATABASE `$dbName`" );
 419                         $conn->selectDB( $dbName );
 420                 }
 421                 return $status;
 422         }
 423
 424         public function setupUser() {
 425                 global $IP;
 426
 427                 if ( !$this->getVar( '_CreateDBAccount' ) ) {
 428                         return Status::newGood();
 429                 }
 430
 431                 $status = $this->getConnection();
 432                 if ( !$status->isOK() ) {
 433                         return $status;
 434                 }
 435
 436                 $db = $this->getVar( 'wgDBname' );
 437                 $this->db->selectDB( $db );
 438                 $error = $this->db->sourceFile( "$IP/maintenance/users.sql" );
 439                 if ( $error !== true ) {
 440                         $status->fatal( 'config-install-user-failed', $this->getVar( 'wgDBuser' ), $error );
 441                 }
 442
 443                 return $status;
 444         }
 445
 446         public function getTableOptions() {
 447                 return array( 'engine' => $this->getVar( '_MysqlEngine' ),
 448                         'default charset' => $this->getVar( '_MysqlCharset' ) );
 449         }
 450
 451         public function getLocalSettings() {
 452                 $dbmysql5 = wfBoolToStr( $this->getVar( 'wgDBmysql5', true ) );
 453                 $prefix = $this->getVar( 'wgDBprefix' );
 454                 $opts = $this->getTableOptions();
 455                 $tblOpts = "ENGINE=" . $opts['engine'] . ', DEFAULT CHARSET=' . $opts['default charset'];
 456                 return
 457 "# MySQL specific settings
 458 \$wgDBprefix         = \"{$prefix}\";
 459
 460 # MySQL table options to use during installation or update
 461 \$wgDBTableOptions   = \"{$tblOpts}\";
 462
 463 # Experimental charset support for MySQL 4.1/5.0.
 464 \$wgDBmysql5 = {$dbmysql5};";
 465         }
 466 }