includes/installer/OracleInstaller.php

   1 <?php
   2 /**
   3  * Oracle-specific installer.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Deployment
  22  */
  23
  24 /**
  25  * Class for setting up the MediaWiki database using Oracle.
  26  *
  27  * @ingroup Deployment
  28  * @since 1.17
  29  */
  30 class OracleInstaller extends DatabaseInstaller {
  31
  32         protected $globalNames = array(
  33                 'wgDBserver',
  34                 'wgDBname',
  35                 'wgDBuser',
  36                 'wgDBpassword',
  37                 'wgDBprefix',
  38         );
  39
  40         protected $internalDefaults = array(
  41                 '_OracleDefTS' => 'USERS',
  42                 '_OracleTempTS' => 'TEMP',
  43                 '_InstallUser' => 'SYSTEM',
  44         );
  45
  46         public $minimumVersion = '9.0.1'; // 9iR1
  47
  48         protected $connError = null;
  49
  50         public function getName() {
  51                 return 'oracle';
  52         }
  53
  54         public function isCompiled() {
  55                 return self::checkExtension( 'oci8' );
  56         }
  57
  58         public function getConnectForm() {
  59                 if ( $this->getVar( 'wgDBserver' ) == 'localhost' ) {
  60                         $this->parent->setVar( 'wgDBserver', '' );
  61                 }
  62                 return $this->getTextBox( 'wgDBserver', 'config-db-host-oracle', array(), $this->parent->getHelpBox( 'config-db-host-oracle-help' ) ) .
  63                         Html::openElement( 'fieldset' ) .
  64                         Html::element( 'legend', array(), wfMessage( 'config-db-wiki-settings' )->text() ) .
  65                         $this->getTextBox( 'wgDBprefix', 'config-db-prefix' ) .
  66                         $this->getTextBox( '_OracleDefTS', 'config-oracle-def-ts' ) .
  67                         $this->getTextBox( '_OracleTempTS', 'config-oracle-temp-ts', array(), $this->parent->getHelpBox( 'config-db-oracle-help' ) ) .
  68                         Html::closeElement( 'fieldset' ) .
  69                         $this->parent->getWarningBox( wfMessage( 'config-db-account-oracle-warn' )->text() ) .
  70                         $this->getInstallUserBox() .
  71                         $this->getWebUserBox();
  72         }
  73
  74         public function submitInstallUserBox() {
  75                 parent::submitInstallUserBox();
  76                 $this->parent->setVar( '_InstallDBname', $this->getVar( '_InstallUser' ) );
  77                 return Status::newGood();
  78         }
  79
  80         public function submitConnectForm() {
  81                 // Get variables from the request
  82                 $newValues = $this->setVarsFromRequest( array( 'wgDBserver', 'wgDBprefix', 'wgDBuser', 'wgDBpassword' ) );
  83                 $this->parent->setVar( 'wgDBname', $this->getVar( 'wgDBuser' ) );
  84
  85                 // Validate them
  86                 $status = Status::newGood();
  87                 if ( !strlen( $newValues['wgDBserver'] ) ) {
  88                         $status->fatal( 'config-missing-db-server-oracle' );
  89                 } elseif ( !self::checkConnectStringFormat( $newValues['wgDBserver'] ) ) {
  90                         $status->fatal( 'config-invalid-db-server-oracle', $newValues['wgDBserver'] );
  91                 }
  92                 if ( !preg_match( '/^[a-zA-Z0-9_]*$/', $newValues['wgDBprefix'] ) ) {
  93                         $status->fatal( 'config-invalid-schema', $newValues['wgDBprefix'] );
  94                 }
  95                 if ( !$status->isOK() ) {
  96                         return $status;
  97                 }
  98
  99                 // Submit user box
 100                 $status = $this->submitInstallUserBox();
 101                 if ( !$status->isOK() ) {
 102                         return $status;
 103                 }
 104
 105                 // Try to connect trough multiple scenarios
 106                 // Scenario 1: Install with a manually created account
 107                 $status = $this->getConnection();
 108                 if ( !$status->isOK() ) {
 109                         if ( $this->connError == 28009 ) {
 110                                 // _InstallUser seems to be a SYSDBA
 111                                 // Scenario 2: Create user with SYSDBA and install with new user
 112                                 $status = $this->submitWebUserBox();
 113                                 if ( !$status->isOK() ) {
 114                                         return $status;
 115                                 }
 116                                 $status = $this->openSYSDBAConnection();
 117                                 if ( !$status->isOK() ) {
 118                                         return $status;
 119                                 }
 120                                 if ( !$this->getVar( '_CreateDBAccount' ) ) {
 121                                         $status->fatal( 'config-db-sys-create-oracle' );
 122                                 }
 123                         } else {
 124                                 return $status;
 125                         }
 126                 } else {
 127                         // check for web user credentials
 128                         // Scenario 3: Install with a priviliged user but use a restricted user
 129                         $statusIS3 = $this->submitWebUserBox();
 130                         if ( !$statusIS3->isOK() ) {
 131                                 return $statusIS3;
 132                         }
 133                 }
 134
 135                 /**
 136                  * @var $conn DatabaseBase
 137                  */
 138                 $conn = $status->value;
 139
 140                 // Check version
 141                 $version = $conn->getServerVersion();
 142                 if ( version_compare( $version, $this->minimumVersion ) < 0 ) {
 143                         return Status::newFatal( 'config-oracle-old', $this->minimumVersion, $version );
 144                 }
 145
 146                 return $status;
 147         }
 148
 149         public function openConnection() {
 150                 $status = Status::newGood();
 151                 try {
 152                         $db = new DatabaseOracle(
 153                                 $this->getVar( 'wgDBserver' ),
 154                                 $this->getVar( '_InstallUser' ),
 155                                 $this->getVar( '_InstallPassword' ),
 156                                 $this->getVar( '_InstallDBname' ),
 157                                 0,
 158                                 $this->getVar( 'wgDBprefix' )
 159                         );
 160                         $status->value = $db;
 161                 } catch ( DBConnectionError $e ) {
 162                         $this->connError = $e->db->lastErrno();
 163                         $status->fatal( 'config-connection-error', $e->getMessage() );
 164                 }
 165                 return $status;
 166         }
 167
 168         public function openSYSDBAConnection() {
 169                 $status = Status::newGood();
 170                 try {
 171                         $db = new DatabaseOracle(
 172                                 $this->getVar( 'wgDBserver' ),
 173                                 $this->getVar( '_InstallUser' ),
 174                                 $this->getVar( '_InstallPassword' ),
 175                                 $this->getVar( '_InstallDBname' ),
 176                                 DBO_SYSDBA,
 177                                 $this->getVar( 'wgDBprefix' )
 178                         );
 179                         $status->value = $db;
 180                 } catch ( DBConnectionError $e ) {
 181                         $this->connError = $e->db->lastErrno();
 182                         $status->fatal( 'config-connection-error', $e->getMessage() );
 183                 }
 184                 return $status;
 185         }
 186
 187         public function needsUpgrade() {
 188                 $tempDBname = $this->getVar( 'wgDBname' );
 189                 $this->parent->setVar( 'wgDBname', $this->getVar( 'wgDBuser' ) );
 190                 $retVal = parent::needsUpgrade();
 191                 $this->parent->setVar( 'wgDBname', $tempDBname );
 192                 return $retVal;
 193         }
 194
 195         public function preInstall() {
 196                 # Add our user callback to installSteps, right before the tables are created.
 197                 $callback = array(
 198                         'name' => 'user',
 199                         'callback' => array( $this, 'setupUser' )
 200                 );
 201                 $this->parent->addInstallStep( $callback, 'database' );
 202         }
 203
 204         public function setupDatabase() {
 205                 $status = Status::newGood();
 206                 return $status;
 207         }
 208
 209         public function setupUser() {
 210                 global $IP;
 211
 212                 if ( !$this->getVar( '_CreateDBAccount' ) ) {
 213                         return Status::newGood();
 214                 }
 215
 216                 // normaly only SYSDBA users can create accounts
 217                 $status = $this->openSYSDBAConnection();
 218                 if ( !$status->isOK() ) {
 219                         if ( $this->connError == 1031 ) {
 220                                 // insufficient  privileges (looks like a normal user)
 221                                 $status = $this->openConnection();
 222                                 if ( !$status->isOK() ) {
 223                                         return $status;
 224                                 }
 225                         } else {
 226                                 return $status;
 227                         }
 228                 }
 229                 $this->db = $status->value;
 230                 $this->setupSchemaVars();
 231
 232                 if ( !$this->db->selectDB( $this->getVar( 'wgDBuser' ) ) ) {
 233                         $this->db->setFlag( DBO_DDLMODE );
 234                         $error = $this->db->sourceFile( "$IP/maintenance/oracle/user.sql" );
 235                         if ( $error !== true || !$this->db->selectDB( $this->getVar( 'wgDBuser' ) ) ) {
 236                                 $status->fatal( 'config-install-user-failed', $this->getVar( 'wgDBuser' ), $error );
 237                         }
 238                 } elseif ( $this->db->getFlag( DBO_SYSDBA ) ) {
 239                         $status->fatal( 'config-db-sys-user-exists-oracle', $this->getVar( 'wgDBuser' ) );
 240                 }
 241
 242                 if ( $status->isOK() ) {
 243                         // user created or already existing, switching back to a normal connection
 244                         // as the new user has all needed privileges to setup the rest of the schema
 245                         // i will be using that user as _InstallUser from this point on
 246                         $this->db->close();
 247                         $this->db = false;
 248                         $this->parent->setVar( '_InstallUser', $this->getVar( 'wgDBuser' ) );
 249                         $this->parent->setVar( '_InstallPassword', $this->getVar( 'wgDBpassword' ) );
 250                         $this->parent->setVar( '_InstallDBname', $this->getVar( 'wgDBuser' ) );
 251                         $status = $this->getConnection();
 252                 }
 253
 254                 return $status;
 255         }
 256
 257         /**
 258          * Overload: after this action field info table has to be rebuilt
 259          * @return Status
 260          */
 261         public function createTables() {
 262                 $this->setupSchemaVars();
 263                 $this->db->setFlag( DBO_DDLMODE );
 264                 $this->parent->setVar( 'wgDBname', $this->getVar( 'wgDBuser' ) );
 265                 $status = parent::createTables();
 266                 $this->db->clearFlag( DBO_DDLMODE );
 267
 268                 $this->db->query( 'BEGIN fill_wiki_info; END;' );
 269
 270                 return $status;
 271         }
 272
 273         public function getSchemaVars() {
 274                 $varNames = array(
 275                         # These variables are used by maintenance/oracle/user.sql
 276                         '_OracleDefTS',
 277                         '_OracleTempTS',
 278                         'wgDBuser',
 279                         'wgDBpassword',
 280
 281                         # These are used by tables.sql
 282                         'wgDBprefix',
 283                 );
 284                 $vars = array();
 285                 foreach ( $varNames as $name ) {
 286                         $vars[$name] = $this->getVar( $name );
 287                 }
 288                 return $vars;
 289         }
 290
 291         public function getLocalSettings() {
 292                 $prefix = $this->getVar( 'wgDBprefix' );
 293                 return
 294 "# Oracle specific settings
 295 \$wgDBprefix = \"{$prefix}\";
 296 ";
 297         }
 298
 299         /**
 300          * Function checks the format of Oracle connect string
 301          * The actual validity of the string is checked by attempting to connect
 302          *
 303          * Regex should be able to validate all connect string formats
 304          * [//](host|tns_name)[:port][/service_name][:POOLED]
 305          * http://www.orafaq.com/wiki/EZCONNECT
 306          *
 307          * @since 1.22
 308          *
 309          * @param string $connect_string
 310          *
 311          * @return bool Whether the connection string is valid.
 312          */
 313         public static function checkConnectStringFormat( $connect_string ) {
 314                 $isValid  = preg_match( '/^[[:alpha:]][\w\-]*(?:\.[[:alpha:]][\w\-]*){0,2}$/', $connect_string ); // TNS name
 315                 $isValid |= preg_match( '/^(?:\/\/)?[\w\-\.]+(?::[\d]+)?(?:\/(?:[\w\-\.]+(?::(pooled|dedicated|shared))?)?(?:\/[\w\-\.]+)?)?$/', $connect_string ); // EZConnect
 316                 return (bool)$isValid;
 317         }
 318
 319 }