computer:wordpress:medien_nur_fuer_eingeloggte_benutzer_freigeben [spring2wiki]

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====== Medien nur für eingeloggte Benutzer freigeben ======
===== Einfach per .htaccess =====
  # require login for media files
  # more info: https://m0n.co/11
  <IfModule mod_rewrite.c>
	RewriteCond %{REQUEST_FILENAME} (.*)
	RewriteCond %{HTTP_COOKIE} !wordpress_logged_in_([a-zA-Z0-9_]*) [NC]
        RewriteRule .* - [QSA,NC,L, R=301]
  </IfModule>

===== Mit php und .htaccess =====
Open up your .htaccess found on the root folder of your website then place the block of code bellow:
	
  RewriteCond %{REQUEST_FILENAME} -s
  RewriteRule ^wp-content/uploads/(.*)$ dl-file.php?file=$1 [QSA,L]

What the code above does is it detects if a file is being accessed directly under wp-content/uploads/ folder, we then redirect the user to dl-file.php to validate if the user has any privilege to view the file.

Now, create the file dl-file.php in your root directory then place the block of code bellow:
	
  /*
  * dl-file.php
  *
  * Protect uploaded files with login.
  *
  * @link http://wordpress.stackexchange.com/questions/37144/protect-wordpress-uploads-if-user-is-not-logged-in
  *
  * @author hakre <http://hakre.wordpress.com/>
  * @license GPL-3.0+
  * @registry SPDX
  */
   
  require_once('wp-load.php');
  
  is_user_logged_in() ||  auth_redirect();
  
  list($basedir) = array_values(array_intersect_key(wp_upload_dir(), array('basedir' => 1)))+array(NULL);
  
  $file =  rtrim($basedir,'/').'/'.str_replace('..', '', isset($_GET[ 'file' ])?$_GET[ 'file' ]:'');
  if (!$basedir || !is_file($file)) {
    status_header(404);
    die('404 &#8212; File not found.');
  }
  
  $mime = wp_check_filetype($file);
  if( false === $mime[ 'type' ] && function_exists( 'mime_content_type' ) )
    $mime[ 'type' ] = mime_content_type( $file );
  
  if( $mime[ 'type' ] )
    $mimetype = $mime[ 'type' ];
  else
    $mimetype = 'image/' . substr( $file, strrpos( $file, '.' ) + 1 );

  header( 'Content-Type: ' . $mimetype ); // always send this
  if ( false === strpos( $_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS' ) )
    header( 'Content-Length: ' . filesize( $file ) );
  
  $last_modified = gmdate( 'D, d M Y H:i:s', filemtime( $file ) );
  $etag = '"' . md5( $last_modified ) . '"';
  header( "Last-Modified: $last_modified GMT" );
  header( 'ETag: ' . $etag );
  header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', time() + 100000000 ) . ' GMT' );
  
  // Support for Conditional GET
  $client_etag = isset( $_SERVER['HTTP_IF_NONE_MATCH'] ) ? stripslashes( $_SERVER['HTTP_IF_NONE_MATCH'] ) : false;
  
  if( ! isset( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) )
    $_SERVER['HTTP_IF_MODIFIED_SINCE'] = false;
  
  $client_last_modified = trim( $_SERVER['HTTP_IF_MODIFIED_SINCE'] );
  // If string is empty, return 0. If not, attempt to parse into a timestamp
  $client_modified_timestamp = $client_last_modified ? strtotime( $client_last_modified ) : 0;
  
  // Make a timestamp for our most recent modification...
  $modified_timestamp = strtotime($last_modified);
  
  if ( ( $client_last_modified && $client_etag )
    ? ( ( $client_modified_timestamp >= $modified_timestamp) && ( $client_etag == $etag ) )
    : ( ( $client_modified_timestamp >= $modified_timestamp) || ( $client_etag == $etag ) )
    ) {
    status_header( 304 );
    exit;
  }
  
  // If we made it this far, just serve the file
  readfile( $file );
  
To prevent direct access to directory listings, simply add the additional code bellow:
	
  Options All -Indexes

Redirect to login page instead of showing Error Message 403 (Forbidden)
	
  ErrorDocument 403 /login.php