MediaWiki  master
ViewAction.php
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1 <?php
28 class ViewAction extends FormlessAction {
29 
30  public function getName() {
31  return 'view';
32  }
33 
34  public function onView() {
35  return null;
36  }
37 
38  public function show() {
39  $config = $this->context->getConfig();
40 
41  if (
42  $config->get( 'DebugToolbar' ) == false && // don't let this get stuck on pages
43  $this->page->checkTouched() // page exists and is not a redirect
44  ) {
45  // Include any redirect in the last-modified calculation
46  $redirFromTitle = $this->page->getRedirectedFrom();
47  if ( !$redirFromTitle ) {
48  $touched = $this->page->getTouched();
49  } elseif ( $config->get( 'MaxRedirects' ) <= 1 ) {
50  $touched = max( $this->page->getTouched(), $redirFromTitle->getTouched() );
51  } else {
52  // Don't bother following the chain and getting the max mtime
53  $touched = null;
54  }
55 
56  // Send HTTP 304 if the IMS matches or otherwise set expiry/last-modified headers
57  if ( $touched && $this->getOutput()->checkLastModified( $touched ) ) {
58  wfDebug( __METHOD__ . ": done 304\n" );
59  return;
60  }
61  }
62 
63  $this->page->view();
64  }
65 }
getOutput()
Get the OutputPage being used for this instance.
Definition: Action.php:208
target page
An action that views article content.
Definition: ViewAction.php:28
wfDebug( $text, $dest='all', array $context=[])
Sends a line to the debug log if enabled or, optionally, to a comment in output.
this hook is for auditing only or null if authentication failed before getting that far or null if we can t even determine that When $user is not null
Definition: hooks.txt:767
An action which just does something, without showing a form first.
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