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<?php
class Red_Htaccess {
var $items;
function encode_from( $url ) {
return '^'.$this->encode( $url ).'$';
}
function encode2nd( $url ) {
$url = urlencode( $url );
$url = str_replace( '%2F', '/', $url );
$url = str_replace( '%3A', ':', $url );
$url = str_replace( '+', '%20', $url );
$url = str_replace( '%24', '$', $url );
return $url;
}
function encode( $url ) {
$url = urlencode( $url );
$url = str_replace( '%2F', '/', $url );
$url = str_replace( '+', '%20', $url );
$url = str_replace( '.', '\\.', $url );
return $url;
}
function encode_regex( $url ) {
$url = str_replace( ' ', '%20', $url );
$url = str_replace( '.', '\\.', $url );
$url = str_replace( '\\.*', '.*', $url );
$url = str_replace( '%24', '$', $url );
return $url;
}
function add_referrer( $item, $match ) {
$from = $this->encode_from( ltrim( $item->url, '/' ) );
if ( $item->regex )
$from = $this->encode_regex( ltrim( $item->url, '/' ) );
if ( ( $match->url_from || $match->url_notfrom ) && $match->referrer ) {
$this->items[] = sprintf( 'RewriteCond %%{HTTP_REFERER} %s [NC]', ( $match->regex ? $this->encode_regex( $match->referrer ) : $this->encode_from( $match->referrer ) ) );
if ( $match->url_from ) {
$to = $this->target( $item->action_type, $match->url_from, $item->action_code, $item->regex );
$this->items[] = sprintf( 'RewriteRule %s %s', $from, $to );
}
if ( $match->url_notfrom ) {
$to = $this->target( $item->action_type, $match->url_notfrom, $item->action_code, $item->regex );
$this->items[] = sprintf( 'RewriteRule %s %s', $from, $to );
}
}
}
function add_agent( $item, $match ) {
$from = $this->encode( ltrim( $item->url, '/' ) );
if ( $item->regex )
$from = $this->encode_regex( ltrim( $item->url, '/' ) );
if ( ( $match->url_from || $match->url_notfrom ) && $match->user_agent ) {
$this->items[] = sprintf( 'RewriteCond %%{HTTP_USER_AGENT} %s [NC]', ( $match->regex ? $this->encode_regex( $match->user_agent ) : $this->encode2nd( $match->user_agent ) ) );
if ( $match->url_from ) {
$to = $this->target( $item->action_type, $match->url_from, $item->action_code, $item->regex );
$this->items[] = sprintf( 'RewriteRule %s %s', $from, $to );
}
if ( $match->url_notfrom ) {
$to = $this->target( $item->action_type, $match->url_notfrom, $item->action_code, $item->regex );
$this->items[] = sprintf( 'RewriteRule %s %s', $from, $to );
}
}
}
function add_url( $item, $match ) {
$to = $this->target( $item->action_type, $match->url, $item->action_code, $item->regex );
$from = $this->encode_from( ltrim( $item->url, '/' ) );
if ( $item->regex )
$from = $this->encode_regex( ltrim ($item->url, '/' ) );
if ( $to )
$this->items[] = sprintf( 'RewriteRule %s %s', $from, $to );
}
function action_random( $data, $code, $regex ) {
// Pick a WP post at random
global $wpdb;
$post = $wpdb->get_var( "SELECT ID FROM {$wpdb->posts} ORDER BY RAND() LIMIT 0,1" );
$url = parse_url( get_permalink( $post ) );
return sprintf( '%s [R=%d,L]', $this->encode( $url['path'] ), $code );
}
function action_pass( $data, $code, $regex ) {
if ( $regex )
return sprintf( '%s [L]', $this->encode2nd( $data ), $code );
return sprintf( '%s [L]', $this->encode2nd( $data ), $code );
}
function action_error( $data, $code, $regex) {
if ( $code == '410' )
return '/ [G,L]';
return '/ [F,L]';
}
function action_url( $data, $code, $regex ) {
if ( $regex )
return sprintf( '%s [R=%d,L]', $this->encode2nd( $data ), $code );
return sprintf( '%s [R=%d,L]', $this->encode2nd( $data ), $code );
}
function target( $action, $data, $code, $regex ) {
$target = 'action_'.$action;
if ( method_exists( $this, $target ) )
return $this->$target( $data, $code, $regex );
return '';
}
function add( $item ) {
$target = 'add_'.$item->match_type;
if ( method_exists( $this, $target ) )
$this->$target( $item, $item->match );
}
function generate() {
$version = get_plugin_data( __FILE__ );
$version = $version['Version'];
$text[] = '# Created by Redirection';
$text[] = '# '.date ('r');
$text[] = '# Redirection '.$version.' - http://urbangiraffe.com/plugins/redirection/';
$text[] = '';
// Default blocked files - I can't think of a reason not to block these
$text[] = '<Files .htaccess,.svn>';
$text[] = 'order allow,deny';
$text[] = 'deny from all';
$text[] = '</Files>';
$text[] = '';
// mod_rewrite section
$text[] = '';
$text[] = 'Options +FollowSymlinks';
$text[] = '';
$text[] = '<IfModule mod_rewrite.c>';
// Add redirects
if ( is_array( $this->items ) )
$text = array_merge( $text, $this->items );
// End of mod_rewrite
$text[] = '</IfModule>';
$text[] = '';
// End of redirection section
$text[] = '# End of Redirection';
$text[] = '';
$text = implode( "\r\n", $text );
$text = str_replace( "\r\n\r\n\r\n", "\r\n", $text );
$text = str_replace( "\r\n\r\n\r\n", "\r\n", $text );
return $text;
}
function save( $filename, $name ) {
$text = $this->generate( $name );
// Does the file already exist?
if ( file_exists( $filename) ) {
$existing = @file_get_contents( $filename );
// Remove any existing Redirection module
$text .= preg_replace( '@# Created by Redirection(.*?)# End of Redirection@sm', '', $existing );
}
$file = @fopen( $filename, 'w' );
if ( $file ) {
$text = str_replace( "\r\n\r\n\r\n", "\r\n", $text );
$text = str_replace( "\r\n\r\n\r\n", "\r\n", $text );
fwrite( $file, $text );
fclose( $file );
return true;
}
return false;
}
}