| 1 |
<?php |
| 2 |
|
| 3 |
/** |
| 4 |
* Convert redirects to .htaccess format |
| 5 |
* |
| 6 |
* Ignores: |
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* - Trailing slash flag |
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* - Query flags |
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*/ |
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class Red_Htaccess { |
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private $items = array(); |
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const INSERT_REGEX = '@\n?# Created by Redirection(?:.*?)# End of Redirection\n?@sm'; |
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|
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private function encode_from( $url ) { |
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$url = $this->encode( $url ); |
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|
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// Apache 2 does not need a leading slashing |
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$url = ltrim( $url, '/' ); |
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|
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// Exactly match the URL |
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return '^' . $url . '$'; |
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} |
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|
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// URL encode some things, but other things can be passed through |
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private function encode2nd( $url ) { |
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$allowed = [ |
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'%2F' => '/', |
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'%3F' => '?', |
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'%3A' => ':', |
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'%3D' => '=', |
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'%26' => '&', |
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'%25' => '%', |
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'+' => '%20', |
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'%24' => '$', |
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'%23' => '#', |
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]; |
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|
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$url = rawurlencode( $url ); |
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return $this->replace_encoding( $url, $allowed ); |
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} |
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|
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private function replace_encoding( $str, $allowed ) { |
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foreach ( $allowed as $before => $after ) { |
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$str = str_replace( $before, $after, $str ); |
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} |
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|
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return $str; |
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} |
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|
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private function encode( $url ) { |
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$allowed = [ |
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'%2F' => '/', |
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'%3F' => '?', |
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'+' => '%20', |
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'.' => '\\.', |
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]; |
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|
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return $this->replace_encoding( rawurlencode( $url ), $allowed ); |
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} |
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|
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private function encode_regex( $url ) { |
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// Remove any newlines |
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$url = preg_replace( "/[\r\n\t].*?$/s", '', $url ); |
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|
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// Remove invalid characters |
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$url = preg_replace( '/[^\PC\s]/u', '', $url ); |
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|
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// Make sure spaces are quoted |
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$url = str_replace( ' ', '%20', $url ); |
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$url = str_replace( '%24', '$', $url ); |
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|
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// No leading slash |
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$url = ltrim( $url, '/' ); |
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|
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// If pattern has a ^ at the start then ensure we don't have a slash immediatley after |
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$url = preg_replace( '@^\^/@', '^', $url ); |
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|
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return $url; |
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} |
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|
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private function add_referrer( $item, $match ) { |
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$from = $this->encode_from( ltrim( $item->get_url(), '/' ) ); |
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if ( $item->is_regex() ) { |
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$from = $this->encode_regex( ltrim( $item->get_url(), '/' ) ); |
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} |
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|
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if ( ( $match->url_from || $match->url_notfrom ) && $match->referrer ) { |
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$this->items[] = sprintf( 'RewriteCond %%{HTTP_REFERER} %s [NC]', ( $match->regex ? $this->encode_regex( $match->referrer ) : $this->encode_from( $match->referrer ) ) ); |
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|
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if ( $match->url_from ) { |
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$to = $this->target( $item->get_action_type(), $match->url_from, $item->get_action_code(), $item->get_match_data() ); |
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$this->items[] = sprintf( 'RewriteRule %s %s', $from, $to ); |
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} |
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|
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if ( $match->url_notfrom ) { |
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$to = $this->target( $item->get_action_type(), $match->url_notfrom, $item->get_action_code(), $item->get_match_data() ); |
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$this->items[] = sprintf( 'RewriteRule %s %s', $from, $to ); |
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} |
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} |
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} |
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|
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private function add_agent( $item, $match ) { |
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$from = $this->encode( ltrim( $item->get_url(), '/' ) ); |
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if ( $item->is_regex() ) { |
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$from = $this->encode_regex( ltrim( $item->get_url(), '/' ) ); |
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} |
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|
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if ( ( $match->url_from || $match->url_notfrom ) && $match->user_agent ) { |
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$this->items[] = sprintf( 'RewriteCond %%{HTTP_USER_AGENT} %s [NC]', ( $match->regex ? $this->encode_regex( $match->user_agent ) : $this->encode2nd( $match->user_agent ) ) ); |
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|
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if ( $match->url_from ) { |
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$to = $this->target( $item->get_action_type(), $match->url_from, $item->get_action_code(), $item->get_match_data() ); |
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$this->items[] = sprintf( 'RewriteRule %s %s', $from, $to ); |
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} |
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|
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if ( $match->url_notfrom ) { |
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$to = $this->target( $item->get_action_type(), $match->url_notfrom, $item->get_action_code(), $item->get_match_data() ); |
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$this->items[] = sprintf( 'RewriteRule %s %s', $from, $to ); |
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} |
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} |
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} |
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|
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private function add_server( $item, $match ) { |
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$match->url = $match->url_from; |
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$this->items[] = sprintf( 'RewriteCond %%{HTTP_HOST} ^%s$ [NC]', preg_quote( $match->server ) ); |
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$this->add_url( $item, $match ); |
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} |
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|
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private function add_url( $item, $match ) { |
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$url = $item->get_url(); |
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|
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if ( $item->is_regex() === false && strpos( $url, '?' ) !== false ) { |
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$url_parts = wp_parse_url( $url ); |
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$url = $url_parts['path']; |
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$query = isset( $url_parts['query'] ) ? $url_parts['query'] : ''; |
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$this->items[] = sprintf( 'RewriteCond %%{QUERY_STRING} ^%s$', $query ); |
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} |
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|
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$to = $this->target( $item->get_action_type(), $match->url, $item->get_action_code(), $item->get_match_data() ); |
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$from = $this->encode_from( $url ); |
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|
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if ( $item->is_regex() ) { |
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$from = $this->encode_regex( $item->get_url() ); |
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} |
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|
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if ( $to ) { |
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$this->items[] = sprintf( 'RewriteRule %s %s', $from, $to ); |
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} |
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} |
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|
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private function add_flags( $current, array $flags ) { |
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return $current . ' [' . implode( ',', $flags ) . ']'; |
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} |
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|
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private function get_source_flags( array $existing, array $source, $url ) { |
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$flags = []; |
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|
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if ( isset( $source['flag_case'] ) && $source['flag_case'] ) { |
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$flags[] = 'NC'; |
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} |
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|
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if ( isset( $source['flag_query'] ) && $source['flag_query'] === 'pass' ) { |
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$flags[] = 'QSA'; |
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} |
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|
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if ( strpos( $url, '#' ) !== false ) { |
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$flags[] = 'NE'; |
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} |
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|
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return array_merge( $existing, $flags ); |
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} |
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|
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private function action_random( $data, $code, $match_data ) { |
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// Pick a WP post at random |
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global $wpdb; |
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|
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$post = $wpdb->get_var( "SELECT ID FROM {$wpdb->posts} ORDER BY RAND() LIMIT 0,1" ); |
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$url = wp_parse_url( get_permalink( $post ) ); |
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|
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$flags = [ sprintf( 'R=%d', $code ) ]; |
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$flags[] = 'L'; |
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$flags = $this->get_source_flags( $flags, $match_data['source'], $data ); |
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|
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return $this->add_flags( $this->encode( $url['path'] ), $flags ); |
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} |
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|
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private function action_pass( $data, $code, $match_data ) { |
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$flags = $this->get_source_flags( [ 'L' ], $match_data['source'], $data ); |
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|
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return $this->add_flags( $this->encode2nd( $data ), $flags ); |
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} |
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|
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private function action_error( $data, $code, $match_data ) { |
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$flags = $this->get_source_flags( [ 'F' ], $match_data['source'], $data ); |
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|
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if ( $code === 410 ) { |
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$flags = $this->get_source_flags( [ 'G' ], $match_data['source'], $data ); |
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} |
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|
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return $this->add_flags( '/', $flags ); |
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} |
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|
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private function action_url( $data, $code, $match_data ) { |
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$flags = [ sprintf( 'R=%d', $code ) ]; |
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$flags[] = 'L'; |
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$flags = $this->get_source_flags( $flags, $match_data['source'], $data ); |
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|
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return $this->add_flags( $this->encode2nd( $data ), $flags ); |
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} |
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|
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private function target( $action, $data, $code, $match_data ) { |
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$target = 'action_' . $action; |
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|
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if ( method_exists( $this, $target ) ) { |
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return $this->$target( $data, $code, $match_data ); |
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} |
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|
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return ''; |
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} |
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|
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private function generate() { |
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$version = red_get_plugin_data( dirname( dirname( __FILE__ ) ) . '/redirection.php' ); |
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|
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if ( count( $this->items ) === 0 ) { |
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return ''; |
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} |
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|
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$text = [ |
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'# Created by Redirection', |
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'# ' . date( 'r' ), |
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'# Redirection ' . trim( $version['Version'] ) . ' - https://redirection.me', |
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'', |
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'<IfModule mod_rewrite.c>', |
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]; |
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|
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// Add http => https option |
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$options = red_get_options(); |
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if ( $options['https'] ) { |
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$text[] = 'RewriteCond %{HTTPS} off'; |
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$text[] = 'RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI}'; |
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} |
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|
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// Add redirects |
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$text = array_merge( $text, array_filter( array_map( [ $this, 'sanitize_redirect' ], $this->items ) ) ); |
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|
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// End of mod_rewrite |
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$text[] = '</IfModule>'; |
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$text[] = ''; |
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|
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// End of redirection section |
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$text[] = '# End of Redirection'; |
| 252 |
|
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$text = implode( "\n", $text ); |
| 254 |
return "\n" . $text . "\n"; |
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} |
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|
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public function add( $item ) { |
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$target = 'add_' . $item->get_match_type(); |
| 259 |
|
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if ( method_exists( $this, $target ) && $item->is_enabled() ) { |
| 261 |
$this->$target( $item, $item->match ); |
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} |
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} |
| 264 |
|
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public function get( $existing = false ) { |
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$text = $this->generate(); |
| 267 |
|
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if ( $existing ) { |
| 269 |
if ( preg_match( self::INSERT_REGEX, $existing ) > 0 ) { |
| 270 |
$text = preg_replace( self::INSERT_REGEX, str_replace( '$', '\\$', $text ), $existing ); |
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} else { |
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$text = $text . "\n" . trim( $existing ); |
| 273 |
} |
| 274 |
} |
| 275 |
|
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return trim( $text ); |
| 277 |
} |
| 278 |
|
| 279 |
public function sanitize_redirect( $text ) { |
| 280 |
return str_replace( [ '<?', '>' ], '', $text ); |
| 281 |
} |
| 282 |
|
| 283 |
public function sanitize_filename( $filename ) { |
| 284 |
return str_replace( '.php', '', $filename ); |
| 285 |
} |
| 286 |
|
| 287 |
public function save( $filename, $content_to_save = false ) { |
| 288 |
$existing = false; |
| 289 |
$filename = $this->sanitize_filename( $filename ); |
| 290 |
|
| 291 |
if ( file_exists( $filename ) ) { |
| 292 |
$existing = file_get_contents( $filename ); |
| 293 |
} |
| 294 |
|
| 295 |
$file = @fopen( $filename, 'w' ); |
| 296 |
if ( $file ) { |
| 297 |
$result = fwrite( $file, $this->get( $existing ) ); |
| 298 |
fclose( $file ); |
| 299 |
|
| 300 |
return $result !== false; |
| 301 |
} |
| 302 |
|
| 303 |
return false; |
| 304 |
} |
| 305 |
} |
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|
