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<?php
/**
* Backend for uploading files from previously stored file.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup Upload
*/
/**
* Implements uploading from previously stored file.
*
* @ingroup Upload
* @author Bryan Tong Minh
*/
class UploadFromStash extends UploadBase {
protected $mFileKey, $mVirtualTempPath, $mFileProps, $mSourceType;
// an instance of UploadStash
private $stash;
//LocalFile repo
private $repo;
/**
* @param $user User
* @param $stash UploadStash
* @param $repo FileRepo
*/
public function __construct( $user = false, $stash = false, $repo = false ) {
// user object. sometimes this won't exist, as when running from cron.
$this->user = $user;
if( $repo ) {
$this->repo = $repo;
} else {
$this->repo = RepoGroup::singleton()->getLocalRepo();
}
if( $stash ) {
$this->stash = $stash;
} else {
if( $user ) {
wfDebug( __METHOD__ . " creating new UploadStash instance for " . $user->getId() . "\n" );
} else {
wfDebug( __METHOD__ . " creating new UploadStash instance with no user\n" );
}
$this->stash = new UploadStash( $this->repo, $this->user );
}
}
/**
* @param $key string
* @return bool
*/
public static function isValidKey( $key ) {
// this is checked in more detail in UploadStash
return (bool)preg_match( UploadStash::KEY_FORMAT_REGEX, $key );
}
/**
* @param $request WebRequest
*
* @return Boolean
*/
public static function isValidRequest( $request ) {
// this passes wpSessionKey to getText() as a default when wpFileKey isn't set.
// wpSessionKey has no default which guarantees failure if both are missing
// (though that should have been caught earlier)
return self::isValidKey( $request->getText( 'wpFileKey', $request->getText( 'wpSessionKey' ) ) );
}
/**
* @param $key string
* @param $name string
*/
public function initialize( $key, $name = 'upload_file', $initTempFile = true ) {
/**
* Confirming a temporarily stashed upload.
* We don't want path names to be forged, so we keep
* them in the session on the server and just give
* an opaque key to the user agent.
*/
$metadata = $this->stash->getMetadata( $key );
$this->initializePathInfo( $name,
$initTempFile ? $this->getRealPath( $metadata['us_path'] ) : false,
$metadata['us_size'],
false
);
$this->mFileKey = $key;
$this->mVirtualTempPath = $metadata['us_path'];
$this->mFileProps = $this->stash->getFileProps( $key );
$this->mSourceType = $metadata['us_source_type'];
}
/**
* @param $request WebRequest
*/
public function initializeFromRequest( &$request ) {
// sends wpSessionKey as a default when wpFileKey is missing
$fileKey = $request->getText( 'wpFileKey', $request->getText( 'wpSessionKey' ) );
// chooses one of wpDestFile, wpUploadFile, filename in that order.
$desiredDestName = $request->getText( 'wpDestFile', $request->getText( 'wpUploadFile', $request->getText( 'filename' ) ) );
$this->initialize( $fileKey, $desiredDestName );
}
/**
* @return string
*/
public function getSourceType() {
return $this->mSourceType;
}
/**
* Get the base 36 SHA1 of the file
* @return string
*/
public function getTempFileSha1Base36() {
return $this->mFileProps['sha1'];
}
/*
* protected function verifyFile() inherited
*/
/**
* Stash the file.
*
* @param $user User
* @return UploadStashFile
*/
public function stashFile( User $user = null ) {
// replace mLocalFile with an instance of UploadStashFile, which adds some methods
// that are useful for stashed files.
$this->mLocalFile = parent::stashFile( $user );
return $this->mLocalFile;
}
/**
* This should return the key instead of the UploadStashFile instance, for backward compatibility.
* @return String
*/
public function stashSession() {
return $this->stashFile()->getFileKey();
}
/**
* Remove a temporarily kept file stashed by saveTempUploadedFile().
* @return bool success
*/
public function unsaveUploadedFile() {
return $this->stash->removeFile( $this->mFileKey );
}
/**
* Perform the upload, then remove the database record afterward.
* @param $comment string
* @param $pageText string
* @param $watch bool
* @param $user User
* @return Status
*/
public function performUpload( $comment, $pageText, $watch, $user ) {
$rv = parent::performUpload( $comment, $pageText, $watch, $user );
$this->unsaveUploadedFile();
return $rv;
}
}
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