includes/exception/HttpError.php

   1 <?php
   2 /**
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  16  * http://www.gnu.org/copyleft/gpl.html
  17  *
  18  * @file
  19  */
  20
  21 use MediaWiki\Logger\LoggerFactory;
  22
  23 /**
  24  * Show an error that looks like an HTTP server error.
  25  * Replacement for wfHttpError().
  26  *
  27  * @since 1.19
  28  * @ingroup Exception
  29  */
  30 class HttpError extends MWException {
  31         private $httpCode, $header, $content;
  32
  33         /**
  34          * @param int $httpCode HTTP status code to send to the client
  35          * @param string|Message $content Content of the message
  36          * @param string|Message|null $header Content of the header (\<title\> and \<h1\>)
  37          */
  38         public function __construct( $httpCode, $content, $header = null ) {
  39                 parent::__construct( $content );
  40                 $this->httpCode = (int)$httpCode;
  41                 $this->header = $header;
  42                 $this->content = $content;
  43         }
  44
  45         /**
  46          * We don't want the default exception logging as we got our own logging set
  47          * up in self::report.
  48          *
  49          * @see MWException::isLoggable
  50          *
  51          * @since 1.24
  52          * @return bool
  53          */
  54         public function isLoggable() {
  55                 return false;
  56         }
  57
  58         /**
  59          * Returns the HTTP status code supplied to the constructor.
  60          *
  61          * @return int
  62          */
  63         public function getStatusCode() {
  64                 return $this->httpCode;
  65         }
  66
  67         /**
  68          * Report and log the HTTP error.
  69          * Sends the appropriate HTTP status code and outputs an
  70          * HTML page with an error message.
  71          */
  72         public function report() {
  73                 $this->doLog();
  74
  75                 HttpStatus::header( $this->httpCode );
  76                 header( 'Content-type: text/html; charset=utf-8' );
  77
  78                 print $this->getHTML();
  79         }
  80
  81         private function doLog() {
  82                 $logger = LoggerFactory::getInstance( 'HttpError' );
  83                 $content = $this->content;
  84
  85                 if ( $content instanceof Message ) {
  86                         $content = $content->text();
  87                 }
  88
  89                 $context = [
  90                         'file' => $this->getFile(),
  91                         'line' => $this->getLine(),
  92                         'http_code' => $this->httpCode,
  93                 ];
  94
  95                 $logMsg = "$content ({http_code}) from {file}:{line}";
  96
  97                 if ( $this->getStatusCode() < 500 ) {
  98                         $logger->info( $logMsg, $context );
  99                 } else {
 100                         $logger->error( $logMsg, $context );
 101                 }
 102         }
 103
 104         /**
 105          * Returns HTML for reporting the HTTP error.
 106          * This will be a minimal but complete HTML document.
 107          *
 108          * @return string HTML
 109          */
 110         public function getHTML() {
 111                 if ( $this->header === null ) {
 112                         $titleHtml = htmlspecialchars( HttpStatus::getMessage( $this->httpCode ) );
 113                 } elseif ( $this->header instanceof Message ) {
 114                         $titleHtml = $this->header->escaped();
 115                 } else {
 116                         $titleHtml = htmlspecialchars( $this->header );
 117                 }
 118
 119                 if ( $this->content instanceof Message ) {
 120                         $contentHtml = $this->content->escaped();
 121                 } else {
 122                         $contentHtml = nl2br( htmlspecialchars( $this->content ) );
 123                 }
 124
 125                 return "<!DOCTYPE html>\n" .
 126                 "<html><head><title>$titleHtml</title></head>\n" .
 127                 "<body><h1>$titleHtml</h1><p>$contentHtml</p></body></html>\n";
 128         }
 129 }