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 /**
  22  * Show an error that looks like an HTTP server error.
  23  * Replacement for wfHttpError().
  24  *
  25  * @since 1.19
  26  * @ingroup Exception
  27  */
  28 class HttpError extends MWException {
  29         private $httpCode, $header, $content;
  30
  31         /**
  32          * Constructor
  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 $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                 $httpMessage = HttpStatus::getMessage( $this->httpCode );
  76
  77                 header( "Status: {$this->httpCode} {$httpMessage}", true, $this->httpCode );
  78                 header( 'Content-type: text/html; charset=utf-8' );
  79
  80                 print $this->getHTML();
  81         }
  82
  83         private function doLog() {
  84                 $logger = MWLoggerFactory::getInstance( 'HttpError' );
  85                 $content = $this->content;
  86
  87                 if ( $content instanceof Message ) {
  88                         $content = $content->text();
  89                 }
  90
  91                 $context = array(
  92                         'file' => $this->getFile(),
  93                         'line' => $this->getLine(),
  94                         'http_code' => $this->httpCode,
  95                 );
  96
  97                 $logMsg = "$content ({http_code}) from {file}:{line}";
  98
  99                 if ( $this->getStatusCode() < 500 ) {
 100                         $logger->info( $logMsg, $context );
 101                 } else {
 102                         $logger->error( $logMsg, $context );
 103                 }
 104         }
 105
 106         /**
 107          * Returns HTML for reporting the HTTP error.
 108          * This will be a minimal but complete HTML document.
 109          *
 110          * @return string HTML
 111          */
 112         public function getHTML() {
 113                 if ( $this->header === null ) {
 114                         $header = HttpStatus::getMessage( $this->httpCode );
 115                 } elseif ( $this->header instanceof Message ) {
 116                         $header = $this->header->escaped();
 117                 } else {
 118                         $header = htmlspecialchars( $this->header );
 119                 }
 120
 121                 if ( $this->content instanceof Message ) {
 122                         $content = $this->content->escaped();
 123                 } else {
 124                         $content = htmlspecialchars( $this->content );
 125                 }
 126
 127                 return "<!DOCTYPE html>\n" .
 128                 "<html><head><title>$header</title></head>\n" .
 129                 "<body><h1>$header</h1><p>$content</p></body></html>\n";
 130         }
 131 }