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safe-redirect-manager.php
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safe-redirect-manager.php
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<?php
/*
Plugin Name: Safe Redirect Manager
Plugin URI: http://www.10up.com
Description: Easily and safely manage HTTP redirects.
Author: Taylor Lovett (10up)
Version: 1.7.8
Author URI: http://www.10up.com
GNU General Public License, Free Software Foundation <http://creativecommons.org/licenses/GPL/2.0/>
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
if ( defined( 'WP_CLI' ) && WP_CLI ) {
require_once dirname( __FILE__ ) . '/inc/wp-cli.php';
}
class SRM_Safe_Redirect_Manager {
public $redirect_post_type = 'redirect_rule';
private $redirect_nonce_name = 'srm_redirect_nonce';
private $redirect_nonce_action = 'srm-save-redirect-meta';
public $meta_key_redirect_from = '_redirect_rule_from';
public $meta_key_redirect_to = '_redirect_rule_to';
public $meta_key_redirect_status_code = '_redirect_rule_status_code';
public $meta_key_enable_redirect_from_regex = '_redirect_rule_from_regex';
public $cache_key_redirects = '_srm_redirects';
public $valid_status_codes = array( 301, 302, 303, 307, 403, 404 );
public $status_code_labels = array(); // Defined later to allow i18n
private $whitelist_hosts = array();
public $default_max_redirects = 150;
/**
* Sets up redirect manager
*
* @since 1.0
* @uses add_action, add_filter
* @return object
*/
public function __construct() {
$this->status_code_labels = array(
301 => __( 'Moved Permanently', 'safe-redirect-manager' ),
302 => __( 'Found', 'safe-redirect-manager' ),
303 => __( 'See Other', 'safe-redirect-manager' ),
307 => __( 'Temporary Redirect', 'safe-redirect-manager' ),
403 => __( 'Forbidden', 'safe-redirect-manager' ),
404 => __( 'Not Found', 'safe-redirect-manager' ),
);
add_action( 'init', array( $this, 'action_init_load_textdomain' ), 9 );
add_action( 'init', array( $this, 'action_init' ) );
add_action( 'init', array( $this, 'action_register_post_types' ) );
add_action( 'parse_request', array( $this, 'action_parse_request' ), 0 );
add_action( 'save_post', array( $this, 'action_save_post' ) );
add_filter( 'manage_' . $this->redirect_post_type . '_posts_columns' , array( $this, 'filter_redirect_columns' ) );
add_action( 'manage_' . $this->redirect_post_type . '_posts_custom_column' , array( $this, 'action_custom_redirect_columns' ), 10, 2 );
add_action( 'transition_post_status', array( $this, 'action_transition_post_status' ), 10, 3 );
add_filter( 'post_updated_messages', array( $this, 'filter_redirect_updated_messages' ) );
add_action( 'admin_notices', array( $this, 'action_redirect_chain_alert' ) );
add_filter( 'the_title', array( $this, 'filter_admin_title' ), 100, 2 );
add_filter( 'bulk_actions-edit-' . $this->redirect_post_type, array( $this, 'filter_bulk_actions' ) );
add_action( 'admin_print_styles-edit.php', array( $this, 'action_print_logo_css' ), 10, 1 );
add_action( 'admin_print_styles-post.php', array( $this, 'action_print_logo_css' ), 10, 1 );
add_action( 'admin_print_styles-post-new.php', array( $this, 'action_print_logo_css' ), 10, 1 );
add_filter( 'post_type_link', array( $this, 'filter_post_type_link' ), 10, 2 );
// Search filters
add_filter( 'posts_join', array( $this, 'filter_search_join' ) );
add_filter( 'posts_where', array( $this, 'filter_search_where' ) );
add_filter( 'posts_distinct', array( $this, 'filter_search_distinct' ) );
}
/**
* Localize plugin
*
* @since 1.7
* @uses load_plugin_textdomain
* @return void
*/
public function action_init_load_textdomain() {
load_plugin_textdomain( 'safe-redirect-manager', false, basename( dirname( __FILE__ ) ) . '/languages' );
}
/**
* Join posts table with postmeta table on search
*
* @since 1.2
* @param string $join
* @uses get_query_var
* @return string
*/
public function filter_search_join( $join ) {
global $wp_query;
if ( empty( $wp_query ) || $this->redirect_post_type != get_query_var( 'post_type' ) ) {
return $join;
}
global $wpdb;
$s = get_query_var( 's' );
if ( ! empty( $s ) ) {
$join .= " LEFT JOIN $wpdb->postmeta AS m ON ($wpdb->posts.ID = m.post_id) ";
}
return $join;
}
/**
* Return distinct search results
*
* @since 1.2
* @param string $distinct
* @uses get_query_var
* @return string
*/
public function filter_search_distinct( $distinct ) {
global $wp_query;
if ( empty( $wp_query ) || $this->redirect_post_type != get_query_var( 'post_type' ) ) {
return $distinct;
}
return 'DISTINCT';
}
/**
* Join posts table with postmeta table on search
*
* @since 1.2
* @param string $where
* @uses is_search, get_query_var
* @return string
*/
public function filter_search_where( $where ) {
global $wp_query;
if ( empty( $wp_query ) || $this->redirect_post_type != get_query_var( 'post_type' ) || ! is_search() || empty( $where ) ) {
return $where;
}
$terms = $this->get_search_terms();
if ( empty( $terms ) ) {
return $where;
}
$exact = get_query_var( 'exact' );
$n = ( ! empty( $exact ) ) ? '' : '%';
$search = '';
$seperator = '';
$search .= '(';
// we check the meta values against each term in the search
foreach ( $terms as $term ) {
$search .= $seperator;
// Used esc_sql instead of wpdb->prepare since wpdb->prepare wraps things in quotes
$search .= sprintf( "( ( m.meta_value LIKE '%s%s%s' AND m.meta_key = '%s') OR ( m.meta_value LIKE '%s%s%s' AND m.meta_key = '%s') )", $n, esc_sql( $term ), $n, esc_sql( $this->meta_key_redirect_from ), $n, esc_sql( $term ), $n, esc_sql( $this->meta_key_redirect_to ) );
$seperator = ' OR ';
}
$search .= ')';
$where = preg_replace( '/\(\(\(.*?\)\)\)/is', '((' . $search . '))', $where );
return $where;
}
/**
* Get an array of search terms
*
* @since 1.2
* @uses get_query_var
* @return array
*/
private function get_search_terms() {
$s = get_query_var( 's' );
if ( ! empty( $s ) ) {
preg_match_all( '/".*?("|$)|((?<=[\\s",+])|^)[^\\s",+]+/', stripslashes( $s ), $matches );
$search_terms = array_map( create_function( '$a', 'return trim( $a, "\\"\'\\n\\r " );' ), $matches[0] );
}
return $search_terms;
}
/**
* Swap tools logo for plugin logo
*
* @since 1.1
* @uses plugins_url
* @return void
*/
public function action_print_logo_css() {
if ( $this->is_plugin_page() ) {
?>
<style type="text/css">
#visibility, .view-switch, .posts .inline-edit-col-left .inline-edit-group, #preview-action {
display: none;
}
#srm<?php echo $this->meta_key_redirect_from; ?> {
width: 60%;
}
</style>
<?php
}
}
/**
* Limit the bulk actions available in the Manage Redirects view
*
* @since 1.0
* @return array
*/
public function filter_bulk_actions( $actions ) {
// No bulk editing at this time
unset( $actions['edit'] );
return $actions;
}
/**
* Creates a redirect post, this function will be useful for import/exports scripts
*
* @param string $redirect_from
* @param string $redirect_to
* @param int $status_code
* @param bool $enable_regex
* @param string $post_status
* @since 1.3
* @uses wp_insert_post, update_post_meta
* @return int|WP_Error
*/
public function create_redirect( $redirect_from, $redirect_to, $status_code = 302, $enable_regex = false, $post_status = 'publish' ) {
global $wpdb;
$sanitized_redirect_from = $this->sanitize_redirect_from( $redirect_from );
$sanitized_redirect_to = $this->sanitize_redirect_to( $redirect_to );
$sanitized_status_code = absint( $status_code );
$sanitized_enable_regex = (bool) $enable_regex;
$sanitized_post_status = sanitize_key( $post_status );
// check and make sure no parameters are empty or invalid after sanitation
if ( empty( $sanitized_redirect_from ) || empty( $sanitized_redirect_to ) ) {
return new WP_Error( 'invalid-argument', __( 'Redirect from and/or redirect to arguments are invalid.', 'safe-redirect-manager' ) );
}
if ( ! in_array( $sanitized_status_code, $this->valid_status_codes ) ) {
return new WP_Error( 'invalid-argument', __( 'Invalid status code.', 'safe-redirect-manager' ) );
}
// Check to ensure this redirect doesn't already exist
if ( $wpdb->get_var( $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta WHERE meta_key=%s AND meta_value=%s", $this->meta_key_redirect_from, $sanitized_redirect_from ) ) ) {
return new WP_Error( 'duplicate-redirect', sprintf( __( 'Redirect already exists for %s', 'safe-redirect-manager' ), $sanitized_redirect_from ) );
}
// create the post
$post_args = array(
'post_type' => $this->redirect_post_type,
'post_status' => $sanitized_post_status,
'post_author' => 1,
);
$post_id = wp_insert_post( $post_args );
if ( 0 >= $post_id ) {
return new WP_Error( 'error-creating', __( 'An error occurred creating the redirect.', 'safe-redirect-manager' ) );
}
// update the posts meta info
update_post_meta( $post_id, $this->meta_key_redirect_from, $sanitized_redirect_from );
update_post_meta( $post_id, $this->meta_key_redirect_to, $sanitized_redirect_to );
update_post_meta( $post_id, $this->meta_key_redirect_status_code, $sanitized_status_code );
update_post_meta( $post_id, $this->meta_key_enable_redirect_from_regex, $sanitized_enable_regex );
// We need to update the cache after creating this redirect
$this->update_redirect_cache();
return $post_id;
}
/**
* Whether or not this is an admin page specific to the plugin
*
* @since 1.1
* @uses get_post_type
* @return bool
*/
private function is_plugin_page() {
return (bool) ( get_post_type() == $this->redirect_post_type || ( isset( $_GET['post_type'] ) && $this->redirect_post_type == $_GET['post_type'] ) );
}
/**
* Echoes admin message if redirect chains exist
*
* @since 1.0
* @uses apply_filters
* @return void
*/
public function action_redirect_chain_alert() {
global $hook_suffix;
if ( $this->is_plugin_page() ) {
/**
* check_for_possible_redirect_loops() runs in best case Theta(n^2) so if you have 100 redirects, this method
* will be running slow. Let's disable it by default.
*/
if ( apply_filters( 'srm_check_for_possible_redirect_loops', false ) ) {
if ( $this->check_for_possible_redirect_loops() ) {
?>
<div class="updated">
<p><?php esc_html_e( 'Safe Redirect Manager Warning: Possible redirect loops and/or chains have been created.', 'safe-redirect-manager' ); ?></p>
</div>
<?php
}
} if ( $this->max_redirects_reached() ) {
?>
<?php if ( 'post-new.php' == $hook_suffix ) : ?><style type="text/css">#post { display: none; }</style><?php endif; ?>
<div class="error">
<p><?php esc_html_e( 'Safe Redirect Manager Error: You have reached the maximum allowable number of redirects', 'safe-redirect-manager' ); ?></p>
</div>
<?php
}
}
}
/**
* Returns true if max redirects have been reached
*
* @since 1.0
* @uses apply_filters, get_transient
* @return bool
*/
public function max_redirects_reached() {
if ( false === ( $redirects = get_transient( $this->cache_key_redirects ) ) ) {
$redirects = $this->update_redirect_cache();
}
return ( count( $redirects ) >= $this->default_max_redirects );
}
/**
* Check for potential redirect loops or chains
*
* @since 1.0
* @uses home_url, get_transient
* @return boolean
*/
public function check_for_possible_redirect_loops() {
if ( false === ( $redirects = get_transient( $this->cache_key_redirects ) ) ) {
$redirects = $this->update_redirect_cache();
}
$current_url = parse_url( home_url() );
$this_host = ( is_array( $current_url ) && ! empty( $current_url['host'] ) ) ? $current_url['host'] : '';
foreach ( $redirects as $redirect ) {
$redirect_from = $redirect['redirect_from'];
// check redirect from against all redirect to's
foreach ( $redirects as $compare_redirect ) {
$redirect_to = $compare_redirect['redirect_to'];
$redirect_url = parse_url( $redirect_to );
$redirect_host = ( is_array( $redirect_url ) && ! empty( $redirect_url['host'] ) ) ? $redirect_url['host'] : '';
// check if we are redirecting locally
if ( empty( $redirect_host ) || $redirect_host == $this_host ) {
$redirect_from_url = preg_replace( '/(http:\/\/|https:\/\/|www\.)/i', '', home_url() . $redirect_from );
$redirect_to_url = $redirect_to;
if ( ! preg_match( '/https?:\/\//i', $redirect_to_url ) ) {
$redirect_to_url = $this_host . $redirect_to_url;
} else { $redirect_to_url = preg_replace( '/(http:\/\/|https:\/\/|www\.)/i', '', $redirect_to_url );
}
// possible loop/chain found
if ( $redirect_to_url == $redirect_from_url ) {
return true;
}
}
}
}
return false;
}
/**
* Filters title out for redirect from in post manager
*
* @since 1.0
* @param string $title
* @param int $post_id
* @uses is_admin, get_post_meta
* @return string
*/
public function filter_admin_title( $title, $post_id = 0 ) {
if ( ! is_admin() ) {
return $title;
}
$redirect = get_post( $post_id );
if ( empty( $redirect ) ) {
return $title;
}
if ( $redirect->post_type != $this->redirect_post_type ) {
return $title;
}
$redirect_from = get_post_meta( $post_id, $this->meta_key_redirect_from, true );
if ( ! empty( $redirect_from ) ) {
return $redirect_from;
}
return $title;
}
/**
* Customizes updated messages for redirects
*
* @since 1.0
* @param array $messages
* @uses esc_url, get_permalink, add_query_var, wp_post_revision_title
* @return array
*/
public function filter_redirect_updated_messages( $messages ) {
global $post, $post_ID;
$messages[ $this->redirect_post_type ] = array(
0 => '', // Unused. Messages start at index 1.
1 => sprintf( __( 'Redirect rule updated.', 'safe-redirect-manager' ), esc_url( get_permalink( $post_ID ) ) ),
2 => __( 'Custom field updated.', 'safe-redirect-manager' ),
3 => __( 'Custom field deleted.', 'safe-redirect-manager' ),
4 => __( 'Redirect rule updated.', 'safe-redirect-manager' ),
/* translators: %s: date and time of the revision */
5 => isset( $_GET['revision'] ) ? sprintf( __( 'Redirect rule restored to revision from %s', 'safe-redirect-manager' ), wp_post_revision_title( (int) $_GET['revision'], false ) ) : false,
6 => sprintf( __( 'Redirect rule published.', 'safe-redirect-manager' ), esc_url( get_permalink( $post_ID ) ) ),
7 => __( 'Redirect rule saved.', 'safe-redirect-manager' ),
8 => sprintf( __( 'Redirect rule submitted.', 'safe-redirect-manager' ), esc_url( add_query_arg( 'preview', 'true', get_permalink( $post_ID ) ) ) ),
9 => sprintf( __( 'Redirect rule scheduled for: <strong>%1$s</strong>.', 'safe-redirect-manager' ),
// translators: Publish box date format, see http://php.net/date
date_i18n( __( 'M j, Y @ G:i' ), strtotime( $post->post_date ) ), esc_url( get_permalink( $post_ID ) ) ),
10 => sprintf( __( 'Redirect rule draft updated.', 'safe-redirect-manager' ), esc_url( add_query_arg( 'preview', 'true', get_permalink( $post_ID ) ) ) ),
);
return $messages;
}
/**
* Clear redirect cache if appropriate post type is transitioned
*
* @since 1.0
* @param string $new_status
* @param string $old_status
* @param object $post
* @uses delete_transient
* @return void
*/
public function action_transition_post_status( $new_status, $old_status, $post ) {
if ( ! is_object( $post ) ) {
return;
}
// recreate redirect cache
if ( $this->redirect_post_type == $post->post_type ) {
delete_transient( $this->cache_key_redirects );
$this->update_redirect_cache();
}
}
/**
* Displays custom columns on redirect manager screen
*
* @since 1.0
* @param string $column
* @param int $post_id
* @uses get_post_meta, esc_html, admin_url
* @return void
*/
public function action_custom_redirect_columns( $column, $post_id ) {
if ( 'srm' . $this->meta_key_redirect_to == $column ) {
echo esc_html( get_post_meta( $post_id, $this->meta_key_redirect_to, true ) );
} elseif ( 'srm' . $this->meta_key_redirect_status_code == $column ) {
echo absint( get_post_meta( $post_id, $this->meta_key_redirect_status_code, true ) );
}
}
/**
* Add new columns to manage redirect screen
*
* @since 1.0
* @param array $columns
* @return array
*/
public function filter_redirect_columns( $columns ) {
$columns[ 'srm' . $this->meta_key_redirect_to ] = __( 'Redirect To', 'safe-redirect-manager' );
$columns[ 'srm' . $this->meta_key_redirect_status_code ] = __( 'HTTP Status Code', 'safe-redirect-manager' );
// Change the title column
$columns['title'] = __( 'Redirect From', 'safe-redirect-manager' );
// Move date column to the back
unset( $columns['date'] );
$columns['date'] = __( 'Date', 'safe-redirect-manager' );
return $columns;
}
/**
* Saves meta info for redirect rules
*
* @since 1.0
* @param int $post_id
* @uses current_user_can, get_post_type, wp_verify_nonce, update_post_meta, delete_post_meta
* @return void
*/
public function action_save_post( $post_id ) {
if ( ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) || ! current_user_can( 'edit_post', $post_id ) || 'revision' == get_post_type( $post_id ) ) {
return;
}
// Update post meta for redirect rules
if ( ! empty( $_POST[ $this->redirect_nonce_name ] ) && wp_verify_nonce( $_POST[ $this->redirect_nonce_name ], $this->redirect_nonce_action ) ) {
if ( ! empty( $_POST[ 'srm' . $this->meta_key_enable_redirect_from_regex ] ) ) {
$allow_regex = (bool) $_POST[ 'srm' . $this->meta_key_enable_redirect_from_regex ];
update_post_meta( $post_id, $this->meta_key_enable_redirect_from_regex, $allow_regex );
} else {
$allow_regex = false;
delete_post_meta( $post_id, $this->meta_key_enable_redirect_from_regex );
}
if ( ! empty( $_POST[ 'srm' . $this->meta_key_redirect_from ] ) ) {
update_post_meta( $post_id, $this->meta_key_redirect_from, $this->sanitize_redirect_from( $_POST[ 'srm' . $this->meta_key_redirect_from ], $allow_regex ) );
} else {
delete_post_meta( $post_id, $this->meta_key_redirect_from );
}
if ( ! empty( $_POST[ 'srm' . $this->meta_key_redirect_to ] ) ) {
update_post_meta( $post_id, $this->meta_key_redirect_to, $this->sanitize_redirect_to( $_POST[ 'srm' . $this->meta_key_redirect_to ] ) );
} else {
delete_post_meta( $post_id, $this->meta_key_redirect_to );
}
if ( ! empty( $_POST[ 'srm' . $this->meta_key_redirect_status_code ] ) ) {
update_post_meta( $post_id, $this->meta_key_redirect_status_code, absint( $_POST[ 'srm' . $this->meta_key_redirect_status_code ] ) );
} else {
delete_post_meta( $post_id, $this->meta_key_redirect_status_code );
}
/**
* This fixes an important bug where the redirect cache was not up-to-date. Previously the cache was only being
* updated on transition_post_status which gets called BEFORE save post. But since save_post is where all the important
* redirect info is saved, updating the cache before it is not sufficient.
*/
$this->update_redirect_cache();
}
}
/**
* Registers post types for plugin
*
* @since 1.0
* @uses register_post_type, _x, plugins_url, apply_filters
* @return void
*/
public function action_register_post_types() {
$redirect_labels = array(
'name' => _x( 'Safe Redirect Manager', 'post type general name', 'safe-redirect-manager' ),
'singular_name' => _x( 'Redirect', 'post type singular name', 'safe-redirect-manager' ),
'add_new' => _x( 'Create Redirect Rule', 'redirect rule', 'safe-redirect-manager' ),
'add_new_item' => __( 'Safe Redirect Manager', 'safe-redirect-manager' ),
'edit_item' => __( 'Edit Redirect Rule', 'safe-redirect-manager' ),
'new_item' => __( 'New Redirect Rule', 'safe-redirect-manager' ),
'all_items' => __( 'Safe Redirect Manager', 'safe-redirect-manager' ),
'view_item' => __( 'View Redirect Rule', 'safe-redirect-manager' ),
'search_items' => __( 'Search Redirects', 'safe-redirect-manager' ),
'not_found' => __( 'No redirect rules found.', 'safe-redirect-manager' ),
'not_found_in_trash' => __( 'No redirect rules found in trash.', 'safe-redirect-manager' ),
'parent_item_colon' => '',
'menu_name' => __( 'Safe Redirect Manager', 'safe-redirect-manager' ),
);
$redirect_capability = 'manage_options';
$redirect_capability = apply_filters( 'srm_restrict_to_capability', $redirect_capability );
$capabilities = array(
'edit_post' => $redirect_capability,
'read_post' => $redirect_capability,
'delete_post' => $redirect_capability,
'delete_posts' => $redirect_capability,
'edit_posts' => $redirect_capability,
'edit_others_posts' => $redirect_capability,
'publish_posts' => $redirect_capability,
'read_private_posts' => $redirect_capability,
);
$redirect_args = array(
'labels' => $redirect_labels,
'public' => false,
'publicly_queryable' => true,
'show_ui' => true,
'show_in_menu' => 'tools.php',
'query_var' => false,
'rewrite' => false,
'capability_type' => 'post',
'capabilities' => $capabilities,
'has_archive' => false,
'hierarchical' => false,
'register_meta_box_cb' => array( $this, 'action_redirect_rule_metabox' ),
'menu_position' => 80,
'supports' => array( '' ),
);
register_post_type( $this->redirect_post_type, $redirect_args );
}
/**
* Registers meta boxes for redirect rule post type
*
* @since 1.0
* @uses add_meta_box
* @return void
*/
public function action_redirect_rule_metabox() {
add_meta_box( 'redirect_settings', __( 'Redirect Settings', 'safe-redirect-manager' ), array( $this, 'redirect_rule_metabox' ), $this->redirect_post_type, 'normal', 'core' );
}
/**
* Echoes HTML for redirect rule meta box
*
* @since 1.0
* @param object $post
* @uses wp_nonce_field, get_post_meta, esc_attr, selected
* @return void
*/
public function redirect_rule_metabox( $post ) {
wp_nonce_field( $this->redirect_nonce_action, $this->redirect_nonce_name );
$redirect_from = get_post_meta( $post->ID, $this->meta_key_redirect_from, true );
$redirect_to = get_post_meta( $post->ID, $this->meta_key_redirect_to, true );
$status_code = get_post_meta( $post->ID, $this->meta_key_redirect_status_code, true );
$enable_regex = get_post_meta( $post->ID, $this->meta_key_enable_redirect_from_regex, true );
if ( empty( $status_code ) ) {
$status_code = apply_filters( 'srm_default_direct_status', 302 );
}
?>
<p>
<label for="srm<?php echo $this->meta_key_redirect_from; ?>"><?php esc_html_e( 'Redirect From:', 'safe-redirect-manager' ); ?></label><br />
<input type="text" name="srm<?php echo $this->meta_key_redirect_from; ?>" id="srm<?php echo $this->meta_key_redirect_from; ?>" value="<?php echo esc_attr( $redirect_from ); ?>" />
<input type="checkbox" name="srm<?php echo $this->meta_key_enable_redirect_from_regex; ?>" id="srm<?php echo $this->meta_key_enable_redirect_from_regex; ?>" <?php checked( true, (bool) $enable_regex ); ?> value="1" />
<label for="srm<?php echo $this->meta_key_enable_redirect_from_regex; ?>"><?php esc_html_e( 'Enable Regular Expressions (advanced)', 'safe-redirect-manager' ); ?></label>
</p>
<p class="description"><?php _e( 'This path should be relative to the root of this WordPress installation (or the sub-site, if you are running a multi-site). Appending a (*) wildcard character will match all requests with the base. Warning: Enabling regular expressions will disable wildcards and completely change the way the * symbol is interpretted.', 'safe-redirect-manager' ); ?></p>
<p>
<label for="srm<?php echo $this->meta_key_redirect_to; ?>"><?php esc_html_e( 'Redirect To:', 'safe-redirect-manager' ); ?></label><br />
<input class="widefat" type="text" name="srm<?php echo $this->meta_key_redirect_to; ?>" id="srm<?php echo $this->meta_key_redirect_to; ?>" value="<?php echo esc_attr( $redirect_to ); ?>" /><br />
<p class="description"><?php esc_html_e( 'This can be a URL or a path relative to the root of your website (not your WordPress installation). Ending with a (*) wildcard character will append the request match to the redirect.', 'safe-redirect-manager' ); ?></p>
<p>
<label for="srm<?php echo $this->meta_key_redirect_status_code; ?>"><?php esc_html_e( 'HTTP Status Code:', 'safe-redirect-manager' ); ?></label>
<select name="srm<?php echo $this->meta_key_redirect_status_code; ?>" id="srm<?php echo $this->meta_key_redirect_status_code; ?>">
<?php foreach ( $this->valid_status_codes as $code ) : ?>
<option value="<?php echo esc_attr( $code ); ?>" <?php selected( $status_code, $code ); ?>><?php echo esc_html( $code . ' ' . $this->status_code_labels[ $code ] ); ?></option>
<?php endforeach; ?>
</select>
<em><?php esc_html_e( "If you don't know what this is, leave it as is.", 'safe-redirect-manager' ); ?></em>
</p>
<?php
}
/**
* Localize plugin
*
* @since 1.0
* @uses load_plugin_textdomain, plugin_basename
* @return void
*/
public function action_init() {
load_plugin_textdomain( 'safe-redirect-manager', false, dirname( plugin_basename( __FILE__ ) ) . '/languages/' );
$this->default_max_redirects = apply_filters( 'srm_max_redirects', $this->default_max_redirects );
}
/**
* Apply whitelisted hosts to allowed_redirect_hosts filter
*
* @since 1.0
* @param array $content
* @return array
*/
public function filter_allowed_redirect_hosts( $content ) {
foreach ( $this->whitelist_hosts as $host ) {
$without_www = preg_replace( '/^www\./i', '', $host );
$with_www = 'www.' . $without_www;
if ( ! in_array( $without_www, $content ) ) { $content[] = $without_www;
}
if ( ! in_array( $with_www, $content ) ) { $content[] = $with_www;
}
}
return $content;
}
/**
* Get redirects from the database
*
* @since 1.6
* @param array $args Any arguments to filter by
* @return array $redirects An array of redirects
*/
public function get_redirects( $args = array() ) {
$redirects = array();
if ( $this->default_max_redirects > 50 ) {
$posts_per_page = 50;
} else { $posts_per_page = $this->default_max_redirects;
}
$i = 1;
do {
$defaults = array(
'posts_per_page' => $posts_per_page,
'post_status' => 'publish',
'paged' => $i,
);
$query_args = array_merge( $defaults, $args );
// Some arguments that don't need to be configurable
$query_args['post_type'] = $this->redirect_post_type;
$query_args['no_found_rows'] = true;
$query_args['update_term_cache'] = false;
$redirect_query = new WP_Query( $query_args );
foreach ( $redirect_query->posts as $redirect ) {
$redirects[] = array(
'ID' => $redirect->ID,
'post_status' => $redirect->post_status,
'redirect_from' => get_post_meta( $redirect->ID, $this->meta_key_redirect_from, true ),
'redirect_to' => get_post_meta( $redirect->ID, $this->meta_key_redirect_to, true ),
'status_code' => (int) get_post_meta( $redirect->ID, $this->meta_key_redirect_status_code, true ),
'enable_regex' => (bool) get_post_meta( $redirect->ID, $this->meta_key_enable_redirect_from_regex, true ),
);
}
if ( count( $redirects ) == $this->default_max_redirects
|| count( $redirect_query->posts ) < $posts_per_page ) {
$build = false;
} else { $build = true;
}
$i++;
} while ( $build );
return $redirects;
}
/**
* Force update on the redirect cache and return cache
*
* @since 1.0
* @uses set_transient, get_post_meta, the_post, have_posts, get_the_ID
* @return array
*/
public function update_redirect_cache() {
$redirect_cache = $this->get_redirects();
set_transient( $this->cache_key_redirects, $redirect_cache );
return $redirect_cache;
}
/**
* Check current url against redirects
*
* @since 1.0
* @uses esc_url_raw, wp_safe_redirect, untrailingslashit, get_transient, add_filter
* @return void
*/
public function action_parse_request() {
// Don't redirect from wp-admin
if ( is_admin() ) {
return;
}
// get redirects from cache or recreate it
if ( false === ( $redirects = get_transient( $this->cache_key_redirects ) ) ) {
$redirects = $this->update_redirect_cache();
}
// If we have no redirects, there is no need to continue
if ( empty( $redirects ) ) {
return;
}
// get requested path and add a / before it
$requested_path = esc_url_raw( $_SERVER['REQUEST_URI'] );
$requested_path = stripslashes( $requested_path );
$requested_path = untrailingslashit( $requested_path );
if ( empty( $requested_path ) ) {
$requested_path = '/';
}
/**
* If WordPress resides in a directory that is not the public root, we have to chop
* the pre-WP path off the requested path.
*/
$parsed_home_url = parse_url( home_url() );
if ( isset( $parsed_home_url['path'] ) && '/' != $parsed_home_url['path'] ) {
$requested_path = preg_replace( '@' . $parsed_home_url['path'] . '@i', '', $requested_path, 1 );
}
// Allow redirects to be filtered
$redirects = apply_filters( 'srm_registered_redirects', $redirects, $requested_path );
// Allow for case insensitive redirects
$case_insensitive = apply_filters( 'srm_case_insensitive_redirects', true );
if ( $case_insensitive ) {
$regex_flag = 'i';
// normalized path is used for matching but not for replace
$normalized_requested_path = strtolower( $requested_path );
} else {
$regex_flag = '';
$normalized_requested_path = $requested_path;
}
foreach ( (array) $redirects as $redirect ) {
$redirect_from = untrailingslashit( $redirect['redirect_from'] );
if ( empty( $redirect_from ) ) {
$redirect_from = '/'; // this only happens in the case where there is a redirect on the root
}
$redirect_to = $redirect['redirect_to'];
$status_code = $redirect['status_code'];
$enable_regex = ( isset( $redirect['enable_regex'] ) ) ? $redirect['enable_regex'] : false;
// check if the redirection destination is valid, otherwise just skip it
if ( empty( $redirect_to ) ) {
continue;
}
// check if requested path is the same as the redirect from path
if ( $enable_regex ) {
$matched_path = preg_match( '@' . $redirect_from . '@' . $regex_flag, $requested_path );
} else {
if ( $case_insensitive ) {
$redirect_from = strtolower( $redirect_from );
}
$matched_path = ( $normalized_requested_path == $redirect_from );
// check if the redirect_from ends in a wildcard
if ( ! $matched_path && (strrpos( $redirect_from, '*' ) === strlen( $redirect_from ) - 1) ) {
$wildcard_base = substr( $redirect_from, 0, strlen( $redirect_from ) - 1 );
// mark as match if requested path matches the base of the redirect from
$matched_path = (substr( $normalized_requested_path, 0, strlen( $wildcard_base ) ) == $wildcard_base);
if ( (strrpos( $redirect_to, '*' ) == strlen( $redirect_to ) - 1 ) ) {
$redirect_to = rtrim( $redirect_to, '*' ) . ltrim( substr( $requested_path, strlen( $wildcard_base ) ), '/' );
}
}
}
if ( $matched_path ) {
// whitelist redirect to host if necessary
$parsed_redirect = parse_url( $redirect_to );
if ( is_array( $parsed_redirect ) && ! empty( $parsed_redirect['host'] ) ) {
$this->whitelist_hosts[] = $parsed_redirect['host'];
add_filter( 'allowed_redirect_hosts' , array( $this, 'filter_allowed_redirect_hosts' ) );
}
// Allow for regex replacement in $redirect_to
if ( $enable_regex ) {
$redirect_to = preg_replace( '@' . $redirect_from . '@' . $regex_flag, $redirect_to, $requested_path );
}
$sanitized_redirect_to = esc_url_raw( $redirect_to );
do_action( 'srm_do_redirect', $requested_path, $sanitized_redirect_to, $status_code );
if ( defined( 'PHPUNIT_SRM_TESTSUITE' ) && PHPUNIT_SRM_TESTSUITE ) {
// Don't actually redirect if we are testing
return;
}
header( 'X-Safe-Redirect-Manager: true' );
// if we have a valid status code, then redirect with it
if ( in_array( $status_code, $this->valid_status_codes ) ) {
wp_safe_redirect( $sanitized_redirect_to, $status_code );
} else { wp_safe_redirect( $sanitized_redirect_to );
}
exit;
}
}
}
/**
* Sanitize redirect to path
*
* The only difference between this function and just calling esc_url_raw is
* esc_url_raw( 'test' ) == 'http://test', whereas sanitize_redirect_path( 'test' ) == '/test'
*
* @since 1.0
* @param string $path
* @uses esc_url_raw
* @return string
*/
public function sanitize_redirect_to( $path ) {
$path = trim( $path );
if ( preg_match( '/^www\./i', $path ) ) {
$path = 'http://' . $path;
}
if ( ! preg_match( '/^https?:\/\//i', $path ) ) {
if ( strpos( $path, '/' ) !== 0 ) {
$path = '/' . $path;
}
}
return esc_url_raw( $path );
}
/**
* Sanitize redirect from path
*
* @since 1.0
* @param string $path
* @param boolean $allow_regex
* @uses esc_url_raw
* @return string
*/
public function sanitize_redirect_from( $path, $allow_regex = false ) {
$path = trim( $path );
if ( empty( $path ) ) {
return '';
}
// dont accept paths starting with a .
if ( ! $allow_regex && strpos( $path, '.' ) === 0 ) {
return '';
}
// turn path in to absolute
if ( preg_match( '/https?:\/\//i', $path ) ) {
$path = preg_replace( '/^(http:\/\/|https:\/\/)(www\.)?[^\/?]+\/?(.*)/i', '/$3', $path );
} elseif ( ! $allow_regex && strpos( $path, '/' ) !== 0 ) {
$path = '/' . $path;
}
// the @ symbol will break our regex engine
$path = str_replace( '@', '', $path );
return $path;
}
/**
* Return a permalink for a redirect post, which is the "redirect from"
* URL for that redirect.
*
* @since 1.7
* @param string $permalink The permalink
* @param object $post A Post object
* @uses home_url, get_post_meta
* @return string The permalink
*/
public function filter_post_type_link( $permalink, $post ) {