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                 '_InstallUser' => 'root',
  31         );
  32
  33         public $supportedEngines = array( 'InnoDB', 'MyISAM' );
  34
  35         public $minimumVersion = '5.0.2';
  36
  37         public $webUserPrivs = array(
  38                 'DELETE',
  39                 'INSERT',
  40                 'SELECT',
  41                 'UPDATE',
  42                 'CREATE TEMPORARY TABLES',
  43         );
  44
  45         /**
  46          * @return string
  47          */
  48         public function getName() {
  49                 return 'mysql';
  50         }
  51
  52         public function __construct( $parent ) {
  53                 parent::__construct( $parent );
  54         }
  55
  56         /**
  57          * @return Bool
  58          */
  59         public function isCompiled() {
  60                 return self::checkExtension( 'mysql' );
  61         }
  62
  63         /**
  64          * @return array
  65          */
  66         public function getGlobalDefaults() {
  67                 return array();
  68         }
  69
  70         /**
  71          * @return string
  72          */
  73         public function getConnectForm() {
  74                 return
  75                         $this->getTextBox( 'wgDBserver', 'config-db-host', array(), $this->parent->getHelpBox( 'config-db-host-help' ) ) .
  76                         Html::openElement( 'fieldset' ) .
  77                         Html::element( 'legend', array(), wfMsg( 'config-db-wiki-settings' ) ) .
  78                         $this->getTextBox( 'wgDBname', 'config-db-name', array( 'dir' => 'ltr' ), $this->parent->getHelpBox( 'config-db-name-help' ) ) .
  79                         $this->getTextBox( 'wgDBprefix', 'config-db-prefix', array( 'dir' => 'ltr' ), $this->parent->getHelpBox( 'config-db-prefix-help' ) ) .
  80                         Html::closeElement( 'fieldset' ) .
  81                         $this->getInstallUserBox();
  82         }
  83
  84         public function submitConnectForm() {
  85                 // Get variables from the request.
  86                 $newValues = $this->setVarsFromRequest( array( 'wgDBserver', 'wgDBname', 'wgDBprefix' ) );
  87
  88                 // Validate them.
  89                 $status = Status::newGood();
  90                 if ( !strlen( $newValues['wgDBserver'] ) ) {
  91                         $status->fatal( 'config-missing-db-host' );
  92                 }
  93                 if ( !strlen( $newValues['wgDBname'] ) ) {
  94                         $status->fatal( 'config-missing-db-name' );
  95                 } elseif ( !preg_match( '/^[a-z0-9_-]+$/i', $newValues['wgDBname'] ) ) {
  96                         $status->fatal( 'config-invalid-db-name', $newValues['wgDBname'] );
  97                 }
  98                 if ( !preg_match( '/^[a-z0-9_-]*$/i', $newValues['wgDBprefix'] ) ) {
  99                         $status->fatal( 'config-invalid-db-prefix', $newValues['wgDBprefix'] );
 100                 }
 101                 if ( !$status->isOK() ) {
 102                         return $status;
 103                 }
 104
 105                 // Submit user box
 106                 $status = $this->submitInstallUserBox();
 107                 if ( !$status->isOK() ) {
 108                         return $status;
 109                 }
 110
 111                 // Try to connect
 112                 $status = $this->getConnection();
 113                 if ( !$status->isOK() ) {
 114                         return $status;
 115                 }
 116                 /**
 117                  * @var $conn DatabaseBase
 118                  */
 119                 $conn = $status->value;
 120
 121                 // Check version
 122                 $version = $conn->getServerVersion();
 123                 if ( version_compare( $version, $this->minimumVersion ) < 0 ) {
 124                         return Status::newFatal( 'config-mysql-old', $this->minimumVersion, $version );
 125                 }
 126
 127                 return $status;
 128         }
 129
 130         /**
 131          * @return Status
 132          */
 133         public function openConnection() {
 134                 $status = Status::newGood();
 135                 try {
 136                         $db = new DatabaseMysql(
 137                                 $this->getVar( 'wgDBserver' ),
 138                                 $this->getVar( '_InstallUser' ),
 139                                 $this->getVar( '_InstallPassword' ),
 140                                 false,
 141                                 false,
 142                                 0,
 143                                 $this->getVar( 'wgDBprefix' )
 144                         );
 145                         $status->value = $db;
 146                 } catch ( DBConnectionError $e ) {
 147                         $status->fatal( 'config-connection-error', $e->getMessage() );
 148                 }
 149                 return $status;
 150         }
 151
 152         public function preUpgrade() {
 153                 global $wgDBuser, $wgDBpassword;
 154
 155                 $status = $this->getConnection();
 156                 if ( !$status->isOK() ) {
 157                         $this->parent->showStatusError( $status );
 158                         return;
 159                 }
 160                 /**
 161                  * @var $conn DatabaseBase
 162                  */
 163                 $conn = $status->value;
 164                 $conn->selectDB( $this->getVar( 'wgDBname' ) );
 165
 166                 # Determine existing default character set
 167                 if ( $conn->tableExists( "revision", __METHOD__ ) ) {
 168                         $revision = $conn->buildLike( $this->getVar( 'wgDBprefix' ) . 'revision' );
 169                         $res = $conn->query( "SHOW TABLE STATUS $revision", __METHOD__ );
 170                         $row = $conn->fetchObject( $res );
 171                         if ( !$row ) {
 172                                 $this->parent->showMessage( 'config-show-table-status' );
 173                                 $existingSchema = false;
 174                                 $existingEngine = false;
 175                         } else {
 176                                 if ( preg_match( '/^latin1/', $row->Collation ) ) {
 177                                         $existingSchema = 'latin1';
 178                                 } elseif ( preg_match( '/^utf8/', $row->Collation ) ) {
 179                                         $existingSchema = 'utf8';
 180                                 } elseif ( preg_match( '/^binary/', $row->Collation ) ) {
 181                                         $existingSchema = 'binary';
 182                                 } else {
 183                                         $existingSchema = false;
 184                                         $this->parent->showMessage( 'config-unknown-collation' );
 185                                 }
 186                                 if ( isset( $row->Engine ) ) {
 187                                         $existingEngine = $row->Engine;
 188                                 } else {
 189                                         $existingEngine = $row->Type;
 190                                 }
 191                         }
 192                 } else {
 193                         $existingSchema = false;
 194                         $existingEngine = false;
 195                 }
 196
 197                 if ( $existingSchema && $existingSchema != $this->getVar( '_MysqlCharset' ) ) {
 198                         $this->setVar( '_MysqlCharset', $existingSchema );
 199                 }
 200                 if ( $existingEngine && $existingEngine != $this->getVar( '_MysqlEngine' ) ) {
 201                         $this->setVar( '_MysqlEngine', $existingEngine );
 202                 }
 203
 204                 # Normal user and password are selected after this step, so for now
 205                 # just copy these two
 206                 $wgDBuser = $this->getVar( '_InstallUser' );
 207                 $wgDBpassword = $this->getVar( '_InstallPassword' );
 208         }
 209
 210         /**
 211          * Get a list of storage engines that are available and supported
 212          *
 213          * @return array
 214          */
 215         public function getEngines() {
 216                 $status = $this->getConnection();
 217
 218                 /**
 219                  * @var $conn DatabaseBase
 220                  */
 221                 $conn = $status->value;
 222
 223                 $engines = array();
 224                 $res = $conn->query( 'SHOW ENGINES', __METHOD__ );
 225                 foreach ( $res as $row ) {
 226                         if ( $row->Support == 'YES' || $row->Support == 'DEFAULT' ) {
 227                                 $engines[] = $row->Engine;
 228                         }
 229                 }
 230                 $engines = array_intersect( $this->supportedEngines, $engines );
 231                 return $engines;
 232         }
 233
 234         /**
 235          * Get a list of character sets that are available and supported
 236          *
 237          * @return array
 238          */
 239         public function getCharsets() {
 240                 return array( 'binary', 'utf8' );
 241         }
 242
 243         /**
 244          * Return true if the install user can create accounts
 245          *
 246          * @return bool
 247          */
 248         public function canCreateAccounts() {
 249                 $status = $this->getConnection();
 250                 if ( !$status->isOK() ) {
 251                         return false;
 252                 }
 253                 /**
 254                  * @var $conn DatabaseBase
 255                  */
 256                 $conn = $status->value;
 257
 258                 // Get current account name
 259                 $currentName = $conn->selectField( '', 'CURRENT_USER()', '', __METHOD__ );
 260                 $parts = explode( '@', $currentName );
 261                 if ( count( $parts ) != 2 ) {
 262                         return false;
 263                 }
 264                 $quotedUser = $conn->addQuotes( $parts[0] ) .
 265                         '@' . $conn->addQuotes( $parts[1] );
 266
 267                 // The user needs to have INSERT on mysql.* to be able to CREATE USER
 268                 // The grantee will be double-quoted in this query, as required
 269                 $res = $conn->select( 'INFORMATION_SCHEMA.USER_PRIVILEGES', '*',
 270                         array( 'GRANTEE' => $quotedUser ), __METHOD__ );
 271                 $insertMysql = false;
 272                 $grantOptions = array_flip( $this->webUserPrivs );
 273                 foreach ( $res as $row ) {
 274                         if ( $row->PRIVILEGE_TYPE == 'INSERT' ) {
 275                                 $insertMysql = true;
 276                         }
 277                         if ( $row->IS_GRANTABLE ) {
 278                                 unset( $grantOptions[$row->PRIVILEGE_TYPE] );
 279                         }
 280                 }
 281
 282                 // Check for DB-specific privs for mysql.*
 283                 if ( !$insertMysql ) {
 284                         $row = $conn->selectRow( 'INFORMATION_SCHEMA.SCHEMA_PRIVILEGES', '*',
 285                                 array(
 286                                         'GRANTEE' => $quotedUser,
 287                                         'TABLE_SCHEMA' => 'mysql',
 288                                         'PRIVILEGE_TYPE' => 'INSERT',
 289                                 ), __METHOD__ );
 290                         if ( $row ) {
 291                                 $insertMysql = true;
 292                         }
 293                 }
 294
 295                 if ( !$insertMysql ) {
 296                         return false;
 297                 }
 298
 299                 // Check for DB-level grant options
 300                 $res = $conn->select( 'INFORMATION_SCHEMA.SCHEMA_PRIVILEGES', '*',
 301                         array(
 302                                 'GRANTEE' => $quotedUser,
 303                                 'IS_GRANTABLE' => 1,
 304                         ), __METHOD__ );
 305                 foreach ( $res as $row ) {
 306                         $regex = $conn->likeToRegex( $row->TABLE_SCHEMA );
 307                         if ( preg_match( $regex, $this->getVar( 'wgDBname' ) ) ) {
 308                                 unset( $grantOptions[$row->PRIVILEGE_TYPE] );
 309                         }
 310                 }
 311                 if ( count( $grantOptions ) ) {
 312                         // Can't grant everything
 313                         return false;
 314                 }
 315                 return true;
 316         }
 317
 318         /**
 319          * @return string
 320          */
 321         public function getSettingsForm() {
 322                 if ( $this->canCreateAccounts() ) {
 323                         $noCreateMsg = false;
 324                 } else {
 325                         $noCreateMsg = 'config-db-web-no-create-privs';
 326                 }
 327                 $s = $this->getWebUserBox( $noCreateMsg );
 328
 329                 // Do engine selector
 330                 $engines = $this->getEngines();
 331                 // If the current default engine is not supported, use an engine that is
 332                 if ( !in_array( $this->getVar( '_MysqlEngine' ), $engines ) ) {
 333                         $this->setVar( '_MysqlEngine', reset( $engines ) );
 334                 }
 335
 336                 $s .= Xml::openElement( 'div', array(
 337                         'id' => 'dbMyisamWarning'
 338                 ));
 339                 $s .= $this->parent->getWarningBox( wfMsg( 'config-mysql-myisam-dep' ) );
 340                 $s .= Xml::closeElement( 'div' );
 341
 342                 if( $this->getVar( '_MysqlEngine' ) != 'MyISAM' ) {
 343                         $s .= Xml::openElement( 'script', array( 'type' => 'text/javascript' ) );
 344                         $s .= '$(\'#dbMyisamWarning\').hide();';
 345                         $s .= Xml::closeElement( 'script' );
 346                 }
 347
 348                 if ( count( $engines ) >= 2 ) {
 349                         $s .= $this->getRadioSet( array(
 350                                 'var' => '_MysqlEngine',
 351                                 'label' => 'config-mysql-engine',
 352                                 'itemLabelPrefix' => 'config-mysql-',
 353                                 'values' => $engines,
 354                                 'itemAttribs' => array(
 355                                         'MyISAM' => array(
 356                                                 'class' => 'showHideRadio',
 357                                                 'rel'   => 'dbMyisamWarning'),
 358                                         'InnoDB' => array(
 359                                                 'class' => 'hideShowRadio',
 360                                                 'rel'   => 'dbMyisamWarning')
 361                         )));
 362                         $s .= $this->parent->getHelpBox( 'config-mysql-engine-help' );
 363                 }
 364
 365                 // If the current default charset is not supported, use a charset that is
 366                 $charsets = $this->getCharsets();
 367                 if ( !in_array( $this->getVar( '_MysqlCharset' ), $charsets ) ) {
 368                         $this->setVar( '_MysqlCharset', reset( $charsets ) );
 369                 }
 370
 371                 // Do charset selector
 372                 if ( count( $charsets ) >= 2 ) {
 373                         $s .= $this->getRadioSet( array(
 374                                 'var' => '_MysqlCharset',
 375                                 'label' => 'config-mysql-charset',
 376                                 'itemLabelPrefix' => 'config-mysql-',
 377                                 'values' => $charsets
 378                         ));
 379                         $s .= $this->parent->getHelpBox( 'config-mysql-charset-help' );
 380                 }
 381
 382                 return $s;
 383         }
 384
 385         /**
 386          * @return Status
 387          */
 388         public function submitSettingsForm() {
 389                 $this->setVarsFromRequest( array( '_MysqlEngine', '_MysqlCharset' ) );
 390                 $status = $this->submitWebUserBox();
 391                 if ( !$status->isOK() ) {
 392                         return $status;
 393                 }
 394
 395                 // Validate the create checkbox
 396                 $canCreate = $this->canCreateAccounts();
 397                 if ( !$canCreate ) {
 398                         $this->setVar( '_CreateDBAccount', false );
 399                         $create = false;
 400                 } else {
 401                         $create = $this->getVar( '_CreateDBAccount' );
 402                 }
 403
 404                 if ( !$create ) {
 405                         // Test the web account
 406                         try {
 407                                 new DatabaseMysql(
 408                                         $this->getVar( 'wgDBserver' ),
 409                                         $this->getVar( 'wgDBuser' ),
 410                                         $this->getVar( 'wgDBpassword' ),
 411                                         false,
 412                                         false,
 413                                         0,
 414                                         $this->getVar( 'wgDBprefix' )
 415                                 );
 416                         } catch ( DBConnectionError $e ) {
 417                                 return Status::newFatal( 'config-connection-error', $e->getMessage() );
 418                         }
 419                 }
 420
 421                 // Validate engines and charsets
 422                 // This is done pre-submit already so it's just for security
 423                 $engines = $this->getEngines();
 424                 if ( !in_array( $this->getVar( '_MysqlEngine' ), $engines ) ) {
 425                         $this->setVar( '_MysqlEngine', reset( $engines ) );
 426                 }
 427                 $charsets = $this->getCharsets();
 428                 if ( !in_array( $this->getVar( '_MysqlCharset' ), $charsets ) ) {
 429                         $this->setVar( '_MysqlCharset', reset( $charsets ) );
 430                 }
 431                 return Status::newGood();
 432         }
 433
 434         public function preInstall() {
 435                 # Add our user callback to installSteps, right before the tables are created.
 436                 $callback = array(
 437                         'name' => 'user',
 438                         'callback' => array( $this, 'setupUser' ),
 439                 );
 440                 $this->parent->addInstallStep( $callback, 'tables' );
 441         }
 442
 443         /**
 444          * @return Status
 445          */
 446         public function setupDatabase() {
 447                 $status = $this->getConnection();
 448                 if ( !$status->isOK() ) {
 449                         return $status;
 450                 }
 451                 $conn = $status->value;
 452                 $dbName = $this->getVar( 'wgDBname' );
 453                 if( !$conn->selectDB( $dbName ) ) {
 454                         $conn->query( "CREATE DATABASE " . $conn->addIdentifierQuotes( $dbName ), __METHOD__ );
 455                         $conn->selectDB( $dbName );
 456                 }
 457                 $this->setupSchemaVars();
 458                 return $status;
 459         }
 460
 461         /**
 462          * @return Status
 463          */
 464         public function setupUser() {
 465                 $dbUser = $this->getVar( 'wgDBuser' );
 466                 if( $dbUser == $this->getVar( '_InstallUser' ) ) {
 467                         return Status::newGood();
 468                 }
 469                 $status = $this->getConnection();
 470                 if ( !$status->isOK() ) {
 471                         return $status;
 472                 }
 473
 474                 $this->setupSchemaVars();
 475                 $dbName = $this->getVar( 'wgDBname' );
 476                 $this->db->selectDB( $dbName );
 477                 $server = $this->getVar( 'wgDBserver' );
 478                 $password = $this->getVar( 'wgDBpassword' );
 479                 $grantableNames = array();
 480
 481                 if ( $this->getVar( '_CreateDBAccount' ) ) {
 482                         // Before we blindly try to create a user that already has access,
 483                         try { // first attempt to connect to the database
 484                                 new DatabaseMysql(
 485                                         $server,
 486                                         $dbUser,
 487                                         $password,
 488                                         false,
 489                                         false,
 490                                         0,
 491                                         $this->getVar( 'wgDBprefix' )
 492                                 );
 493                                 $grantableNames[] = $this->buildFullUserName( $dbUser, $server );
 494                                 $tryToCreate = false;
 495                         } catch ( DBConnectionError $e ) {
 496                                 $tryToCreate = true;
 497                         }
 498                 } else {
 499                         $grantableNames[] = $this->buildFullUserName( $dbUser, $server );
 500                         $tryToCreate = false;
 501                 }
 502
 503                 if( $tryToCreate ) {
 504                         $createHostList = array($server,
 505                                 'localhost',
 506                                 'localhost.localdomain',
 507                                 '%'
 508                         );
 509
 510                         $createHostList = array_unique( $createHostList );
 511                         $escPass = $this->db->addQuotes( $password );
 512
 513                         foreach( $createHostList as $host ) {
 514                                 $fullName = $this->buildFullUserName( $dbUser, $host );
 515                                 if( !$this->userDefinitelyExists( $dbUser, $host ) ) {
 516                                         try{
 517                                                 $this->db->begin();
 518                                                 $this->db->query( "CREATE USER $fullName IDENTIFIED BY $escPass", __METHOD__ );
 519                                                 $this->db->commit();
 520                                                 $grantableNames[] = $fullName;
 521                                         } catch( DBQueryError $dqe ) {
 522                                                 if( $this->db->lastErrno() == 1396 /* ER_CANNOT_USER */ ) {
 523                                                         // User (probably) already exists
 524                                                         $this->db->rollback();
 525                                                         $status->warning( 'config-install-user-alreadyexists', $dbUser );
 526                                                         $grantableNames[] = $fullName;
 527                                                         break;
 528                                                 } else {
 529                                                         // If we couldn't create for some bizzare reason and the
 530                                                         // user probably doesn't exist, skip the grant
 531                                                         $this->db->rollback();
 532                                                         $status->warning( 'config-install-user-create-failed', $dbUser, $dqe->getText() );
 533                                                 }
 534                                         }
 535                                 } else {
 536                                         $status->warning( 'config-install-user-alreadyexists', $dbUser );
 537                                         $grantableNames[] = $fullName;
 538                                         break;
 539                                 }
 540                         }
 541                 }
 542
 543                 // Try to grant to all the users we know exist or we were able to create
 544                 $dbAllTables = $this->db->addIdentifierQuotes( $dbName ) . '.*';
 545                 foreach( $grantableNames as $name ) {
 546                         try {
 547                                 $this->db->begin();
 548                                 $this->db->query( "GRANT ALL PRIVILEGES ON $dbAllTables TO $name", __METHOD__ );
 549                                 $this->db->commit();
 550                         } catch( DBQueryError $dqe ) {
 551                                 $this->db->rollback();
 552                                 $status->fatal( 'config-install-user-grant-failed', $dbUser, $dqe->getText() );
 553                         }
 554                 }
 555
 556                 return $status;
 557         }
 558
 559         /**
 560          * Return a formal 'User'@'Host' username for use in queries
 561          * @param $name String Username, quotes will be added
 562          * @param $host String Hostname, quotes will be added
 563          * @return String
 564          */
 565         private function buildFullUserName( $name, $host ) {
 566                 return $this->db->addQuotes( $name ) . '@' . $this->db->addQuotes( $host );
 567         }
 568
 569         /**
 570          * Try to see if the user account exists. Our "superuser" may not have
 571          * access to mysql.user, so false means "no" or "maybe"
 572          * @param $host String Hostname to check
 573          * @param $user String Username to check
 574          * @return boolean
 575          */
 576         private function userDefinitelyExists( $host, $user ) {
 577                 try {
 578                         $res = $this->db->selectRow( 'mysql.user', array( 'Host', 'User' ),
 579                                 array( 'Host' => $host, 'User' => $user ), __METHOD__ );
 580                         return (bool)$res;
 581                 } catch( DBQueryError $dqe ) {
 582                         return false;
 583                 }
 584
 585         }
 586
 587         /**
 588          * Return any table options to be applied to all tables that don't
 589          * override them.
 590          *
 591          * @return String
 592          */
 593         protected function getTableOptions() {
 594                 $options = array();
 595                 if ( $this->getVar( '_MysqlEngine' ) !== null ) {
 596                         $options[] = "ENGINE=" . $this->getVar( '_MysqlEngine' );
 597                 }
 598                 if ( $this->getVar( '_MysqlCharset' ) !== null ) {
 599                         $options[] = 'DEFAULT CHARSET=' . $this->getVar( '_MysqlCharset' );
 600                 }
 601                 return implode( ', ', $options );
 602         }
 603
 604         /**
 605          * Get variables to substitute into tables.sql and the SQL patch files.
 606          *
 607          * @return array
 608          */
 609         public function getSchemaVars() {
 610                 return array(
 611                         'wgDBTableOptions' => $this->getTableOptions(),
 612                         'wgDBname' => $this->getVar( 'wgDBname' ),
 613                         'wgDBuser' => $this->getVar( 'wgDBuser' ),
 614                         'wgDBpassword' => $this->getVar( 'wgDBpassword' ),
 615                 );
 616         }
 617
 618         public function getLocalSettings() {
 619                 $dbmysql5 = wfBoolToStr( $this->getVar( 'wgDBmysql5', true ) );
 620                 $prefix = LocalSettingsGenerator::escapePhpString( $this->getVar( 'wgDBprefix' ) );
 621                 $tblOpts = LocalSettingsGenerator::escapePhpString( $this->getTableOptions() );
 622                 return
 623 "# MySQL specific settings
 624 \$wgDBprefix         = \"{$prefix}\";
 625
 626 # MySQL table options to use during installation or update
 627 \$wgDBTableOptions   = \"{$tblOpts}\";
 628
 629 # Experimental charset support for MySQL 5.0.
 630 \$wgDBmysql5 = {$dbmysql5};";
 631         }
 632 }