MediaWiki  1.30.0
dumpRev.php
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1 <?php
24 require_once __DIR__ . '/../Maintenance.php';
25 
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;
DumpRev
Maintenance script that gets the text of a revision, resolving external storage if needed.
Definition: dumpRev.php:32
ExternalStore\fetchFromURL
static fetchFromURL( $url, array $params=[])
Fetch data from given URL.
Definition: ExternalStore.php:75
unserialize
unserialize( $serialized)
Definition: ApiMessage.php:185
RUN_MAINTENANCE_IF_MAIN
require_once RUN_MAINTENANCE_IF_MAIN
Definition: maintenance.txt:50
Maintenance
Abstract maintenance class for quickly writing and churning out maintenance scripts with minimal effo...
Definition: maintenance.txt:39
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:35
DumpRev\__construct
__construct()
Default constructor.
Definition: dumpRev.php:33
$blob
$blob
Definition: testCompression.php:63
DB_REPLICA
const DB_REPLICA
Definition: defines.php:25
ExternalStore\getStoreObject
static getStoreObject( $proto, array $params=[])
Get an external store object of the given type, with the given parameters.
Definition: ExternalStore.php:54
$dbr
if(! $regexes) $dbr
Definition: cleanup.php:94
$maintClass
$maintClass
Definition: dumpRev.php:87
Maintenance\addArg
addArg( $arg, $description, $required=true)
Add some args that are needed.
Definition: Maintenance.php:267
Maintenance\getDB
getDB( $db, $groups=[], $wiki=false)
Returns a database to be used by current maintenance script.
Definition: Maintenance.php:1251
Maintenance\error
error( $err, $die=0)
Throw an error to the user.
Definition: Maintenance.php:392
Maintenance\output
output( $out, $channel=null)
Throw some output to the user.
Definition: Maintenance.php:373
DumpRev\execute
execute()
Do the actual work.
Definition: dumpRev.php:38
Maintenance\getArg
getArg( $argId=0, $default=null)
Get an argument.
Definition: Maintenance.php:306
$flags
it s the revision text itself In either if gzip is the revision text is gzipped $flags
Definition: hooks.txt:2801