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| 1 | <?php |
| 2 | use MediaWiki\Html\TemplateParser; |
| 3 | |
| 4 | /** |
| 5 | * Thrown when ExtensionRegistry cannot open the extension.json or skin.json file. |
| 6 | * |
| 7 | * We handle this case specially, because it is one of the more |
| 8 | * common errors a new MW sysadmin is likely to encounter and we |
| 9 | * want their initial experience to be good. wfLoadExtension() |
| 10 | * generally happens before MWExceptionRenderer gets installed |
| 11 | * so we cannot use that. |
| 12 | * |
| 13 | * @ingroup ExtensionRegistry |
| 14 | * @internal |
| 15 | */ |
| 16 | class MissingExtensionException extends Exception { |
| 17 | private bool $isSkin; |
| 18 | private string $extName = 'unknown'; |
| 19 | private string $path; |
| 20 | private string $error; |
| 21 | |
| 22 | /** |
| 23 | * @param string $path Path of file that cannot be read |
| 24 | * @param string $error Text of error mtime gave |
| 25 | */ |
| 26 | public function __construct( string $path, string $error ) { |
| 27 | $this->isSkin = str_ends_with( $path, "/skin.json" ); |
| 28 | $m = []; |
| 29 | preg_match( "!/([^/]*)/[^/]*.json$!", $path, $m ); |
| 30 | if ( $m ) { |
| 31 | $this->extName = $m[1]; |
| 32 | } |
| 33 | $this->path = $path; |
| 34 | $this->error = $error; |
| 35 | |
| 36 | parent::__construct( "Error Loading extension. Unable to open file $path: $error" ); |
| 37 | } |
| 38 | |
| 39 | /** |
| 40 | * Output error message as html. |
| 41 | * |
| 42 | * Avoid relying on MW stuff, as it might not be setup yet. |
| 43 | * We don't bother translating, as the user may not have even set lang yet. |
| 44 | * |
| 45 | */ |
| 46 | private function renderHtml() { |
| 47 | if ( !headers_sent() ) { |
| 48 | HttpStatus::header( 500 ); |
| 49 | header( 'Content-Type: text/html; charset=UTF-8' ); |
| 50 | } |
| 51 | |
| 52 | $templateParser = new TemplateParser( null, new EmptyBagOStuff() ); |
| 53 | |
| 54 | try { |
| 55 | echo $templateParser->processTemplate( |
| 56 | 'ExtensionConfigError', |
| 57 | [ |
| 58 | 'version' => MW_VERSION, |
| 59 | 'path' => $this->path, |
| 60 | 'type' => $this->isSkin ? 'skin' : 'extension', |
| 61 | 'error' => $this->error, |
| 62 | 'extName' => $this->extName, |
| 63 | 'trace' => $this->getTraceAsString(), |
| 64 | 'mwLogo' => $this->getMWLogo(), |
| 65 | ] |
| 66 | ); |
| 67 | } catch ( Exception $e ) { |
| 68 | echo 'Error: ' . htmlspecialchars( $e->getMessage() ); |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * Render the error for CLI |
| 74 | */ |
| 75 | private function renderText() { |
| 76 | $type = $this->isSkin ? 'skin' : 'extension'; |
| 77 | echo "Error: The $this->extName $type cannot be loaded. " |
| 78 | . "Check that all of its files are installed properly.\n\n"; |
| 79 | echo $this->getTraceAsString(); |
| 80 | echo "\n"; |
| 81 | } |
| 82 | |
| 83 | /** |
| 84 | * Output an error response and exit. |
| 85 | * |
| 86 | * @return never |
| 87 | */ |
| 88 | public function render() { |
| 89 | if ( wfIsCli() ) { |
| 90 | $this->renderText(); |
| 91 | } else { |
| 92 | $this->renderHtml(); |
| 93 | } |
| 94 | // Make sure that the error gets into logs. |
| 95 | // This will also stop execution. |
| 96 | trigger_error( $this->getMessage(), E_USER_ERROR ); |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * Get the url for the MW logo |
| 101 | * |
| 102 | * @return string |
| 103 | */ |
| 104 | private function getMWLogo() { |
| 105 | global $wgResourceBasePath; |
| 106 | $suffix = "/resources/assets/mediawiki.png"; |
| 107 | if ( $wgResourceBasePath !== null ) { |
| 108 | // We are early in setup, so we can't rely on this. |
| 109 | return $wgResourceBasePath . $suffix; |
| 110 | } |
| 111 | $path = '/'; |
| 112 | foreach ( array_filter( explode( '/', $_SERVER['PHP_SELF'] ) ) as $part ) { |
| 113 | if ( !preg_match( '/\.php$/', $part ) ) { |
| 114 | $path .= "$part/"; |
| 115 | } else { |
| 116 | break; |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | return $path . $suffix; |
| 121 | } |
| 122 | } |