MediaWiki REL1_31
dumpRev.php
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1<?php
24require_once __DIR__ . '/../Maintenance.php';
25
32class 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->fatalError( "Row not found" );
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::class;
88require_once RUN_MAINTENANCE_IF_MAIN;
unserialize
unserialize( $serialized)
Definition ApiMessage.php:192
DumpRev
Maintenance script that gets the text of a revision, resolving external storage if needed.
Definition dumpRev.php:32
DumpRev\execute
execute()
Do the actual work.
Definition dumpRev.php:38
DumpRev\__construct
__construct()
Default constructor.
Definition dumpRev.php:33
Maintenance
Abstract maintenance class for quickly writing and churning out maintenance scripts with minimal effo...
Definition maintenance.txt:39
Maintenance\error
error( $err, $die=0)
Throw an error to the user.
Definition Maintenance.php:416
Maintenance\addArg
addArg( $arg, $description, $required=true)
Add some args that are needed.
Definition Maintenance.php:271
Maintenance\getDB
getDB( $db, $groups=[], $wiki=false)
Returns a database to be used by current maintenance script.
Definition Maintenance.php:1309
Maintenance\getArg
getArg( $argId=0, $default=null)
Get an argument.
Definition Maintenance.php:310
Maintenance\fatalError
fatalError( $msg, $exitCode=1)
Output a message and terminate the current script.
Definition Maintenance.php:439
output
design txt This is a brief overview of the new design More thorough and up to date information is available on the documentation wiki at etc Handles the details of getting and saving to the user table of the and dealing with sessions and cookies OutputPage Encapsulates the entire HTML page that will be sent in response to any server request It is used by calling its functions to add in any and then calling output() to send it all. It could be easily changed to send incrementally if that becomes useful
$maintClass
$maintClass
Definition dumpRev.php:87
php
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
Definition injection.txt:37
RUN_MAINTENANCE_IF_MAIN
require_once RUN_MAINTENANCE_IF_MAIN
Definition maintenance.txt:50
DB_REPLICA
const DB_REPLICA
Definition defines.php:25