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<title>[27652] trunk/src: Widget Customizer: Improve error handling.</title>
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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://core.trac.wordpress.org/changeset/27652">27652</a></dd>
<dt>Author</dt> <dd>ocean90</dd>
<dt>Date</dt> <dd>2014-03-22 20:54:17 +0000 (Sat, 22 Mar 2014)</dd>
</dl>
<h3>Log Message</h3>
<pre>Widget Customizer: Improve error handling. First pass.
* Replace Widget_Customizer_Exception with WP_Error
* Call Previewer.cheatin() to show the cheating message if a user can't change widgets
* Call Previewer.login() to show the login form if a user is logged out
* Show a generic error message on failures
see <a href="http://core.trac.wordpress.org/ticket/27419">#27419</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpadminjscustomizewidgetsjs">trunk/src/wp-admin/js/customize-widgets.js</a></li>
<li><a href="#trunksrcwpincludesclasswpcustomizewidgetsphp">trunk/src/wp-includes/class-wp-customize-widgets.php</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpadminjscustomizewidgetsjs"></a>
<div class="modfile"><h4>Modified: trunk/src/wp-admin/js/customize-widgets.js (27651 => 27652)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/src/wp-admin/js/customize-widgets.js 2014-03-22 10:53:10 UTC (rev 27651)
+++ trunk/src/wp-admin/js/customize-widgets.js 2014-03-22 20:54:17 UTC (rev 27652)
</span><span class="lines">@@ -16,7 +16,8 @@
</span><span class="cx"> save_btn_label: '',
</span><span class="cx"> save_btn_tooltip: '',
</span><span class="cx"> remove_btn_label: '',
</span><del>- remove_btn_tooltip: ''
</del><ins>+ remove_btn_tooltip: '',
+ error: '',
</ins><span class="cx"> },
</span><span class="cx"> available_widgets: [], // available widgets for instantiating
</span><span class="cx"> registered_widgets: [], // all widgets registered
</span><span class="lines">@@ -1172,6 +1173,9 @@
</span><span class="cx">
</span><span class="cx"> widget_content = control.container.find( '.widget-content' );
</span><span class="cx">
</span><ins>+ // Remove a previous error message
+ widget_content.find( '.widget-error' ).remove();
+
</ins><span class="cx"> // @todo Support more selectors than IDs?
</span><span class="cx"> if ( $.contains( control.container[0], document.activeElement ) && $( document.activeElement ).is( '[id]' ) ) {
</span><span class="cx"> element_id_to_refocus = $( document.activeElement ).prop( 'id' );
</span><span class="lines">@@ -1219,6 +1223,22 @@
</span><span class="cx"> has_same_inputs_in_response,
</span><span class="cx"> is_instance_identical;
</span><span class="cx">
</span><ins>+ // Check if the user is logged out.
+ if ( '0' === r ) {
+ self.previewer.preview.iframe.hide();
+ self.previewer.login().done( function() {
+ control.updateWidget( args );
+ self.previewer.preview.iframe.show();
+ } );
+ return;
+ }
+
+ // Check for cheaters.
+ if ( '-1' === r ) {
+ self.previewer.cheatin();
+ return;
+ }
+
</ins><span class="cx"> if ( r.success ) {
</span><span class="cx"> sanitized_form = $( '<div>' + r.data.form + '</div>' );
</span><span class="cx">
</span><span class="lines">@@ -1274,9 +1294,7 @@
</span><span class="cx"> * preview finishing loading.
</span><span class="cx"> */
</span><span class="cx"> is_instance_identical = _( control.setting() ).isEqual( r.data.instance );
</span><del>- if ( is_instance_identical ) {
- control.container.removeClass( 'previewer-loading' );
- } else {
</del><ins>+ if ( ! is_instance_identical ) {
</ins><span class="cx"> control.is_widget_updating = true; // suppress triggering another updateWidget
</span><span class="cx"> control.setting( r.data.instance );
</span><span class="cx"> control.is_widget_updating = false;
</span><span class="lines">@@ -1286,26 +1304,24 @@
</span><span class="cx"> complete_callback.call( control, null, { no_change: is_instance_identical, ajax_finished: true } );
</span><span class="cx"> }
</span><span class="cx"> } else {
</span><del>- window.console && window.console.log( r );
- message = 'FAIL';
</del><ins>+ message = self.i18n.error;
</ins><span class="cx"> if ( r.data && r.data.message ) {
</span><span class="cx"> message = r.data.message;
</span><span class="cx"> }
</span><span class="cx"> if ( complete_callback ) {
</span><span class="cx"> complete_callback.call( control, message );
</span><span class="cx"> } else {
</span><del>- throw new Error( message );
</del><ins>+ widget_content.prepend( '<p class="widget-error"><strong>' + message + '</strong></p>' );
</ins><span class="cx"> }
</span><span class="cx"> }
</span><span class="cx"> } );
</span><span class="cx"> jqxhr.fail( function ( jqXHR, textStatus ) {
</span><span class="cx"> if ( complete_callback ) {
</span><span class="cx"> complete_callback.call( control, textStatus );
</span><del>- } else {
- throw new Error( textStatus );
</del><span class="cx"> }
</span><span class="cx"> } );
</span><span class="cx"> jqxhr.always( function () {
</span><ins>+ control.container.removeClass( 'previewer-loading' );
</ins><span class="cx"> control.container.removeClass( 'widget-form-loading' );
</span><span class="cx"> inputs.each( function () {
</span><span class="cx"> $( this ).removeData( 'state' + update_number );
</span></span></pre></div>
<a id="trunksrcwpincludesclasswpcustomizewidgetsphp"></a>
<div class="modfile"><h4>Modified: trunk/src/wp-includes/class-wp-customize-widgets.php (27651 => 27652)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/src/wp-includes/class-wp-customize-widgets.php 2014-03-22 10:53:10 UTC (rev 27651)
+++ trunk/src/wp-includes/class-wp-customize-widgets.php 2014-03-22 20:54:17 UTC (rev 27652)
</span><span class="lines">@@ -424,17 +424,14 @@
</span><span class="cx"> /**
</span><span class="cx"> * Convert a widget setting ID (option path) to its id_base and number components
</span><span class="cx"> *
</span><del>- * @throws Widget_Customizer_Exception
- * @throws Exception
- *
</del><span class="cx"> * @param string $setting_id
</span><del>- * @param array
- * @return array
</del><ins>+ * @return WP_Error|array
</ins><span class="cx"> */
</span><span class="cx"> static function parse_widget_setting_id( $setting_id ) {
</span><span class="cx"> if ( ! preg_match( '/^(widget_(.+?))(?:\[(\d+)\])?$/', $setting_id, $matches ) ) {
</span><del>- throw new Widget_Customizer_Exception( sprintf( 'Invalid widget setting ID: %s', $setting_id ) );
</del><ins>+ return new WP_Error( 'invalid_setting_id', 'Invalid widget setting ID' );
</ins><span class="cx"> }
</span><ins>+
</ins><span class="cx"> $id_base = $matches[2];
</span><span class="cx"> $number = isset( $matches[3] ) ? intval( $matches[3] ) : null;
</span><span class="cx"> return compact( 'id_base', 'number' );
</span><span class="lines">@@ -500,6 +497,7 @@
</span><span class="cx"> 'save_btn_tooltip' => ( 'Save and preview changes before publishing them.' ),
</span><span class="cx"> 'remove_btn_label' => __( 'Remove' ),
</span><span class="cx"> 'remove_btn_tooltip' => ( 'Trash widget by moving it to the inactive widgets sidebar.' ),
</span><ins>+ 'error' => __('An error has occurred. Please reload the page and try again.'),
</ins><span class="cx"> ),
</span><span class="cx"> 'tpl' => array(
</span><span class="cx"> 'widget_reorder_nav' => $widget_reorder_nav_tpl,
</span><span class="lines">@@ -912,108 +910,106 @@
</span><span class="cx"> * Find and invoke the widget update and control callbacks. Requires that
</span><span class="cx"> * $_POST be populated with the instance data.
</span><span class="cx"> *
</span><del>- * @throws Widget_Customizer_Exception
- * @throws Exception
- *
- * @param string $widget_id
- * @return array
</del><ins>+ * @param string $widget_id
+ * @return WP_Error|array
</ins><span class="cx"> */
</span><span class="cx"> static function call_widget_update( $widget_id ) {
</span><span class="cx"> global $wp_registered_widget_updates, $wp_registered_widget_controls;
</span><span class="cx">
</span><span class="cx"> $options_transaction = new Options_Transaction();
</span><span class="cx">
</span><del>- try {
- $options_transaction->start();
- $parsed_id = self::parse_widget_id( $widget_id );
- $option_name = 'widget_' . $parsed_id['id_base'];
</del><ins>+ $options_transaction->start();
+ $parsed_id = self::parse_widget_id( $widget_id );
+ $option_name = 'widget_' . $parsed_id['id_base'];
</ins><span class="cx">
</span><del>- /**
- * If a previously-sanitized instance is provided, populate the input vars
- * with its values so that the widget update callback will read this instance
- */
- $added_input_vars = array();
- if ( ! empty( $_POST['sanitized_widget_setting'] ) ) {
- $sanitized_widget_setting = json_decode( self::get_post_value( 'sanitized_widget_setting' ), true );
- if ( empty( $sanitized_widget_setting ) ) {
- throw new Widget_Customizer_Exception( 'Malformed sanitized_widget_setting' );
- }
- $instance = self::sanitize_widget_instance( $sanitized_widget_setting );
- if ( is_null( $instance ) ) {
- throw new Widget_Customizer_Exception( 'Unsanitary sanitized_widget_setting' );
- }
- if ( ! is_null( $parsed_id['number'] ) ) {
- $value = array();
- $value[$parsed_id['number']] = $instance;
- $key = 'widget-' . $parsed_id['id_base'];
</del><ins>+ /**
+ * If a previously-sanitized instance is provided, populate the input vars
+ * with its values so that the widget update callback will read this instance
+ */
+ $added_input_vars = array();
+ if ( ! empty( $_POST['sanitized_widget_setting'] ) ) {
+ $sanitized_widget_setting = json_decode( self::get_post_value( 'sanitized_widget_setting' ), true );
+ if ( empty( $sanitized_widget_setting ) ) {
+ $options_transaction->rollback();
+ return new WP_Error( 'malformed_data', 'Malformed sanitized_widget_setting' );
+ }
+
+ $instance = self::sanitize_widget_instance( $sanitized_widget_setting );
+ if ( is_null( $instance ) ) {
+ $options_transaction->rollback();
+ return new WP_Error( 'unsanitary_data', 'Unsanitary sanitized_widget_setting' );
+ }
+
+ if ( ! is_null( $parsed_id['number'] ) ) {
+ $value = array();
+ $value[$parsed_id['number']] = $instance;
+ $key = 'widget-' . $parsed_id['id_base'];
+ $_REQUEST[$key] = $_POST[$key] = wp_slash( $value );
+ $added_input_vars[] = $key;
+ } else {
+ foreach ( $instance as $key => $value ) {
</ins><span class="cx"> $_REQUEST[$key] = $_POST[$key] = wp_slash( $value );
</span><span class="cx"> $added_input_vars[] = $key;
</span><del>- } else {
- foreach ( $instance as $key => $value ) {
- $_REQUEST[$key] = $_POST[$key] = wp_slash( $value );
- $added_input_vars[] = $key;
- }
</del><span class="cx"> }
</span><span class="cx"> }
</span><ins>+ }
</ins><span class="cx">
</span><del>- /**
- * Invoke the widget update callback
- */
- foreach ( (array) $wp_registered_widget_updates as $name => $control ) {
- if ( $name === $parsed_id['id_base'] && is_callable( $control['callback'] ) ) {
- ob_start();
- call_user_func_array( $control['callback'], $control['params'] );
- ob_end_clean();
- break;
- }
</del><ins>+ /**
+ * Invoke the widget update callback
+ */
+ foreach ( (array) $wp_registered_widget_updates as $name => $control ) {
+ if ( $name === $parsed_id['id_base'] && is_callable( $control['callback'] ) ) {
+ ob_start();
+ call_user_func_array( $control['callback'], $control['params'] );
+ ob_end_clean();
+ break;
</ins><span class="cx"> }
</span><ins>+ }
</ins><span class="cx">
</span><del>- // Clean up any input vars that were manually added
- foreach ( $added_input_vars as $key ) {
- unset( $_POST[$key] );
- unset( $_REQUEST[$key] );
- }
</del><ins>+ // Clean up any input vars that were manually added
+ foreach ( $added_input_vars as $key ) {
+ unset( $_POST[$key] );
+ unset( $_REQUEST[$key] );
+ }
</ins><span class="cx">
</span><del>- /**
- * Make sure the expected option was updated
- */
- if ( 0 !== $options_transaction->count() ) {
- if ( count( $options_transaction->options ) > 1 ) {
- throw new Widget_Customizer_Exception( sprintf( 'Widget %1$s unexpectedly updated more than one option.', $widget_id ) );
- }
- $updated_option_name = key( $options_transaction->options );
- if ( $updated_option_name !== $option_name ) {
- throw new Widget_Customizer_Exception( sprintf( 'Widget %1$s updated option "%2$s", but expected "%3$s".', $widget_id, $updated_option_name, $option_name ) );
- }
</del><ins>+ /**
+ * Make sure the expected option was updated
+ */
+ if ( 0 !== $options_transaction->count() ) {
+ if ( count( $options_transaction->options ) > 1 ) {
+ $options_transaction->rollback();
+ return new WP_Error( 'unexpected_update', 'Widget unexpectedly updated more than one option.' );
</ins><span class="cx"> }
</span><span class="cx">
</span><del>- /**
- * Obtain the widget control with the updated instance in place
- */
- ob_start();
- $form = $wp_registered_widget_controls[$widget_id];
- if ( $form ) {
- call_user_func_array( $form['callback'], $form['params'] );
</del><ins>+ $updated_option_name = key( $options_transaction->options );
+ if ( $updated_option_name !== $option_name ) {
+ $options_transaction->rollback();
+ return new WP_Error( 'wrong_option', sprintf( 'Widget updated option "%1$s", but expected "%2$s".', $updated_option_name, $option_name ) );
</ins><span class="cx"> }
</span><del>- $form = ob_get_clean();
</del><ins>+ }
</ins><span class="cx">
</span><del>- /**
- * Obtain the widget instance
- */
- $option = get_option( $option_name );
- if ( null !== $parsed_id['number'] ) {
- $instance = $option[$parsed_id['number']];
- } else {
- $instance = $option;
- }
</del><ins>+ /**
+ * Obtain the widget control with the updated instance in place
+ */
+ ob_start();
+ $form = $wp_registered_widget_controls[$widget_id];
+ if ( $form ) {
+ call_user_func_array( $form['callback'], $form['params'] );
+ }
+ $form = ob_get_clean();
</ins><span class="cx">
</span><del>- $options_transaction->rollback();
- return compact( 'instance', 'form' );
</del><ins>+ /**
+ * Obtain the widget instance
+ */
+ $option = get_option( $option_name );
+ if ( null !== $parsed_id['number'] ) {
+ $instance = $option[$parsed_id['number']];
+ } else {
+ $instance = $option;
</ins><span class="cx"> }
</span><del>- catch ( Exception $e ) {
- $options_transaction->rollback();
- throw $e;
- }
</del><ins>+
+ $options_transaction->rollback();
+ return compact( 'instance', 'form' );
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> /**
</span><span class="lines">@@ -1026,53 +1022,47 @@
</span><span class="cx"> * @action wp_ajax_update_widget
</span><span class="cx"> */
</span><span class="cx"> static function wp_ajax_update_widget() {
</span><del>- $generic_error = __( 'An error has occurred. Please reload the page and try again.' );
</del><span class="cx">
</span><del>- try {
- if ( ! check_ajax_referer( self::UPDATE_WIDGET_AJAX_ACTION, self::UPDATE_WIDGET_NONCE_POST_KEY, false ) ) {
- throw new Widget_Customizer_Exception( ( 'Nonce check failed. Reload and try again?' ) );
- }
- if ( ! current_user_can( 'edit_theme_options' ) ) {
- throw new Widget_Customizer_Exception( ( 'Current user cannot!' ) ); // @todo translate
- }
- if ( ! isset( $_POST['widget-id'] ) ) {
- throw new Widget_Customizer_Exception( ( 'Incomplete request' ) ); // @todo translate
- }
</del><ins>+ if ( ! is_user_logged_in() ) {
+ wp_die( 0 );
+ }
</ins><span class="cx">
</span><del>- unset( $_POST[self::UPDATE_WIDGET_NONCE_POST_KEY], $_POST['action'] );
</del><ins>+ check_ajax_referer( self::UPDATE_WIDGET_AJAX_ACTION, self::UPDATE_WIDGET_NONCE_POST_KEY );
</ins><span class="cx">
</span><del>- do_action( 'load-widgets.php' );
- do_action( 'widgets.php' );
- do_action( 'sidebar_admin_setup' );
</del><ins>+ if ( ! current_user_can( 'edit_theme_options' ) ) {
+ wp_die( -1 );
+ }
</ins><span class="cx">
</span><del>- $widget_id = self::get_post_value( 'widget-id' );
- $parsed_id = self::parse_widget_id( $widget_id );
- $id_base = $parsed_id['id_base'];
</del><ins>+ if ( ! isset( $_POST['widget-id'] ) ) {
+ wp_send_json_error();
+ }
</ins><span class="cx">
</span><del>- if ( isset( $_POST['widget-' . $id_base] ) && is_array( $_POST['widget-' . $id_base] ) && preg_match( '/__i__|%i%/', key( $_POST['widget-' . $id_base] ) ) ) {
- throw new Widget_Customizer_Exception( 'Cannot pass widget templates to create new instances; apply template vars in JS' );
- }
</del><ins>+ unset( $_POST[self::UPDATE_WIDGET_NONCE_POST_KEY], $_POST['action'] );
</ins><span class="cx">
</span><del>- $updated_widget = self::call_widget_update( $widget_id ); // => {instance,form}
- $form = $updated_widget['form'];
- $instance = self::sanitize_widget_js_instance( $updated_widget['instance'] );
</del><ins>+ do_action( 'load-widgets.php' );
+ do_action( 'widgets.php' );
+ do_action( 'sidebar_admin_setup' );
</ins><span class="cx">
</span><del>- wp_send_json_success( compact( 'form', 'instance' ) );
</del><ins>+ $widget_id = self::get_post_value( 'widget-id' );
+ $parsed_id = self::parse_widget_id( $widget_id );
+ $id_base = $parsed_id['id_base'];
+
+ if ( isset( $_POST['widget-' . $id_base] ) && is_array( $_POST['widget-' . $id_base] ) && preg_match( '/__i__|%i%/', key( $_POST['widget-' . $id_base] ) ) ) {
+ wp_send_json_error();
</ins><span class="cx"> }
</span><del>- catch( Exception $e ) {
- if ( $e instanceof Widget_Customizer_Exception ) {
- $message = $e->getMessage();
- } else {
- error_log( sprintf( '%s in %s: %s', get_class( $e ), __FUNCTION__, $e->getMessage() ) );
- $message = $generic_error;
- }
- wp_send_json_error( compact( 'message' ) );
</del><ins>+
+ $updated_widget = self::call_widget_update( $widget_id ); // => {instance,form}
+ if ( is_wp_error( $updated_widget ) ) {
+ wp_send_json_error();
</ins><span class="cx"> }
</span><ins>+
+ $form = $updated_widget['form'];
+ $instance = self::sanitize_widget_js_instance( $updated_widget['instance'] );
+
+ wp_send_json_success( compact( 'form', 'instance' ) );
</ins><span class="cx"> }
</span><span class="cx"> }
</span><span class="cx">
</span><del>-class Widget_Customizer_Exception extends Exception {}
-
</del><span class="cx"> class Options_Transaction {
</span><span class="cx">
</span><span class="cx"> /**
</span><span class="lines">@@ -1204,9 +1194,6 @@
</span><span class="cx"> else if ( 'update' === $option_operation['operation'] ) {
</span><span class="cx"> update_option( $option_operation['option_name'], $option_operation['old_value'] );
</span><span class="cx"> }
</span><del>- else {
- throw new Exception( 'Unexpected operation' );
- }
</del><span class="cx"> }
</span><span class="cx"> $this->_is_current = false;
</span><span class="cx"> }
</span></span></pre>
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