includes/WebRequestUpload.php

   1 <?php
   2 /**
   3  * Object to access the $_FILES array
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * Object to access the $_FILES array
  25  *
  26  * @ingroup HTTP
  27  */
  28 class WebRequestUpload {
  29         protected $request;
  30         protected $doesExist;
  31         protected $fileInfo;
  32
  33         /**
  34          * Constructor. Should only be called by WebRequest
  35          *
  36          * @param WebRequest $request The associated request
  37          * @param string $key Key in $_FILES array (name of form field)
  38          */
  39         public function __construct( $request, $key ) {
  40                 $this->request = $request;
  41                 $this->doesExist = isset( $_FILES[$key] );
  42                 if ( $this->doesExist ) {
  43                         $this->fileInfo = $_FILES[$key];
  44                 }
  45         }
  46
  47         /**
  48          * Return whether a file with this name was uploaded.
  49          *
  50          * @return bool
  51          */
  52         public function exists() {
  53                 return $this->doesExist;
  54         }
  55
  56         /**
  57          * Return the original filename of the uploaded file
  58          *
  59          * @return string|null Filename or null if non-existent
  60          */
  61         public function getName() {
  62                 if ( !$this->exists() ) {
  63                         return null;
  64                 }
  65
  66                 global $wgContLang;
  67                 $name = $this->fileInfo['name'];
  68
  69                 # Safari sends filenames in HTML-encoded Unicode form D...
  70                 # Horrid and evil! Let's try to make some kind of sense of it.
  71                 $name = Sanitizer::decodeCharReferences( $name );
  72                 $name = $wgContLang->normalize( $name );
  73                 wfDebug( __METHOD__ . ": {$this->fileInfo['name']} normalized to '$name'\n" );
  74                 return $name;
  75         }
  76
  77         /**
  78          * Return the file size of the uploaded file
  79          *
  80          * @return int File size or zero if non-existent
  81          */
  82         public function getSize() {
  83                 if ( !$this->exists() ) {
  84                         return 0;
  85                 }
  86
  87                 return $this->fileInfo['size'];
  88         }
  89
  90         /**
  91          * Return the path to the temporary file
  92          *
  93          * @return string|null Path or null if non-existent
  94          */
  95         public function getTempName() {
  96                 if ( !$this->exists() ) {
  97                         return null;
  98                 }
  99
 100                 return $this->fileInfo['tmp_name'];
 101         }
 102
 103         /**
 104          * Return the upload error. See link for explanation
 105          * https://secure.php.net/manual/en/features.file-upload.errors.php
 106          *
 107          * @return int One of the UPLOAD_ constants, 0 if non-existent
 108          */
 109         public function getError() {
 110                 if ( !$this->exists() ) {
 111                         return 0; # UPLOAD_ERR_OK
 112                 }
 113
 114                 return $this->fileInfo['error'];
 115         }
 116
 117         /**
 118          * Returns whether this upload failed because of overflow of a maximum set
 119          * in php.ini
 120          *
 121          * @return bool
 122          */
 123         public function isIniSizeOverflow() {
 124                 if ( $this->getError() == UPLOAD_ERR_INI_SIZE ) {
 125                         # PHP indicated that upload_max_filesize is exceeded
 126                         return true;
 127                 }
 128
 129                 $contentLength = $this->request->getHeader( 'Content-Length' );
 130                 $maxPostSize = wfShorthandToInteger(
 131                         ini_get( 'post_max_size' ) ?: ini_get( 'hhvm.server.max_post_size' ),
 132                         0
 133                 );
 134
 135                 if ( $maxPostSize && $contentLength > $maxPostSize ) {
 136                         # post_max_size is exceeded
 137                         return true;
 138                 }
 139
 140                 return false;
 141         }
 142 }