]> scripts.mit.edu Git - autoinstalls/mediawiki.git/blob - maintenance/storage/dumpRev.php
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[autoinstalls/mediawiki.git] / maintenance / storage / dumpRev.php
1 <?php
2 /**
3  * Get the text of a revision, resolving external storage if needed.
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 Maintenance ExternalStorage
22  */
23
24 require_once __DIR__ . '/../Maintenance.php';
25
26 /**
27  * Maintenance script that gets the text of a revision,
28  * resolving external storage if needed.
29  *
30  * @ingroup Maintenance ExternalStorage
31  */
32 class DumpRev extends Maintenance {
33         public function __construct() {
34                 parent::__construct();
35                 $this->addArg( 'rev-id', 'Revision ID', true );
36         }
37
38         public function execute() {
39                 $dbr = $this->getDB( DB_REPLICA );
40                 $row = $dbr->selectRow(
41                         [ 'text', 'revision' ],
42                         [ 'old_flags', 'old_text' ],
43                         [ 'old_id=rev_text_id', 'rev_id' => $this->getArg() ]
44                 );
45                 if ( !$row ) {
46                         $this->error( "Row not found", true );
47                 }
48
49                 $flags = explode( ',', $row->old_flags );
50                 $text = $row->old_text;
51                 if ( in_array( 'external', $flags ) ) {
52                         $this->output( "External $text\n" );
53                         if ( preg_match( '!^DB://(\w+)/(\w+)/(\w+)$!', $text, $m ) ) {
54                                 $es = ExternalStore::getStoreObject( 'DB' );
55                                 $blob = $es->fetchBlob( $m[1], $m[2], $m[3] );
56                                 if ( strtolower( get_class( $blob ) ) == 'concatenatedgziphistoryblob' ) {
57                                         $this->output( "Found external CGZ\n" );
58                                         $blob->uncompress();
59                                         $this->output( "Items: (" . implode( ', ', array_keys( $blob->mItems ) ) . ")\n" );
60                                         $text = $blob->getItem( $m[3] );
61                                 } else {
62                                         $this->output( "CGZ expected at $text, got " . gettype( $blob ) . "\n" );
63                                         $text = $blob;
64                                 }
65                         } else {
66                                 $this->output( "External plain $text\n" );
67                                 $text = ExternalStore::fetchFromURL( $text );
68                         }
69                 }
70                 if ( in_array( 'gzip', $flags ) ) {
71                         $text = gzinflate( $text );
72                 }
73                 if ( in_array( 'object', $flags ) ) {
74                         $obj = unserialize( $text );
75                         $text = $obj->getText();
76                 }
77
78                 if ( is_object( $text ) ) {
79                         $this->error( "Unexpectedly got object of type: " . get_class( $text ) );
80                 } else {
81                         $this->output( "Text length: " . strlen( $text ) . "\n" );
82                         $this->output( substr( $text, 0, 100 ) . "\n" );
83                 }
84         }
85 }
86
87 $maintClass = "DumpRev";
88 require_once RUN_MAINTENANCE_IF_MAIN;