Merge the query sanity checks from #21212 to the 3.9 branch.
Props pento, nacin, mdawaffe, DrewAPicture. Built from https://develop.svn.wordpress.org/branches/3.9@32182 git-svn-id: http://core.svn.wordpress.org/branches/3.9@32155 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Gary Pendergast
parent
8b1471168e
commit
e4e09f8491
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@ -177,6 +177,7 @@ function _wp_translate_postdata( $update = false, $post_data = null ) {
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* @return int Post ID.
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*/
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function edit_post( $post_data = null ) {
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global $wpdb;
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if ( empty($post_data) )
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$post_data = &$_POST;
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@ -317,7 +318,19 @@ function edit_post( $post_data = null ) {
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update_post_meta( $post_ID, '_edit_last', get_current_user_id() );
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$success = wp_update_post( $post_data );
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// If the save failed, see if we can sanity check the main fields and try again
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if ( ! $success && is_callable( array( $wpdb, 'strip_invalid_text_for_column' ) ) ) {
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$fields = array( 'post_title', 'post_content', 'post_excerpt' );
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foreach( $fields as $field ) {
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if ( isset( $post_data[ $field ] ) ) {
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$post_data[ $field ] = $wpdb->strip_invalid_text_for_column( $wpdb->posts, $field, $post_data[ $field ] );
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}
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}
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wp_update_post( $post_data );
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}
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// Now that we have an ID we can fix any attachment anchor hrefs
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_fix_attachment_links( $post_ID );
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@ -140,6 +140,43 @@ class wpdb {
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*/
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protected $result;
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/**
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* Cached column info, for sanity checking data before inserting
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*
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* @since 4.2.0
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* @access protected
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* @var array
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*/
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protected $col_meta = array();
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/**
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* Calculated character sets on tables
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*
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* @since 4.2.0
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* @access protected
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* @var array
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*/
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protected $table_charset = array();
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/**
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* Whether text fields in the current query need to be sanity checked.
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*
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* @since 4.2.0
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* @access protected
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* @var bool
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*/
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protected $check_current_query = true;
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/**
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* Flag to ensure we don't run into recursion problems when checking the collation.
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*
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* @since 4.2.0
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* @access protected
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* @see wpdb::check_safe_collation()
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* @var boolean
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*/
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protected $checking_collation = false;
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/**
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* Saved info on the table column
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*
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@ -639,6 +676,14 @@ class wpdb {
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* @param mixed $value The value to set
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*/
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function __set( $name, $value ) {
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$protected_members = array(
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'col_meta',
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'table_charset',
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'check_current_query',
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);
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if ( in_array( $name, $protected_members, true ) ) {
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return;
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}
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$this->$name = $value;
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}
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@ -708,7 +753,7 @@ class wpdb {
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$query = $this->prepare( 'SET NAMES %s', $charset );
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if ( ! empty( $collate ) )
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$query .= $this->prepare( ' COLLATE %s', $collate );
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mysqli_query( $query, $dbh );
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mysqli_query( $dbh, $query );
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}
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} else {
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if ( function_exists( 'mysql_set_charset' ) && $this->has_cap( 'set_charset' ) ) {
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@ -1496,8 +1541,10 @@ class wpdb {
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* @return int|false Number of rows affected/selected or false on error
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*/
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function query( $query ) {
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if ( ! $this->ready )
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if ( ! $this->ready ) {
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$this->check_current_query = true;
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return false;
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}
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/**
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* Filter the database query.
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@ -1517,6 +1564,20 @@ class wpdb {
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// Log how the function was called
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$this->func_call = "\$db->query(\"$query\")";
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// If we're writing to the database, make sure the query will write safely.
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if ( $this->check_current_query && ! $this->check_ascii( $query ) ) {
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$stripped_query = $this->strip_invalid_text_from_query( $query );
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// strip_invalid_text_from_query() can perform queries, so we need
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// to flush again, just to make sure everything is clear.
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$this->flush();
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if ( $stripped_query !== $query ) {
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$this->insert_id = 0;
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return false;
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}
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}
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$this->check_current_query = true;
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// Keep track of the last query for debug..
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$this->last_query = $query;
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@ -1690,23 +1751,29 @@ class wpdb {
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* @return int|false The number of rows affected, or false on error.
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*/
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function _insert_replace_helper( $table, $data, $format = null, $type = 'INSERT' ) {
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if ( ! in_array( strtoupper( $type ), array( 'REPLACE', 'INSERT' ) ) )
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if ( ! in_array( strtoupper( $type ), array( 'REPLACE', 'INSERT' ) ) ) {
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return false;
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$this->insert_id = 0;
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$formats = $format = (array) $format;
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$fields = array_keys( $data );
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$formatted_fields = array();
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foreach ( $fields as $field ) {
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if ( !empty( $format ) )
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$form = ( $form = array_shift( $formats ) ) ? $form : $format[0];
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elseif ( isset( $this->field_types[$field] ) )
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$form = $this->field_types[$field];
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else
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$form = '%s';
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$formatted_fields[] = $form;
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}
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$sql = "{$type} INTO `$table` (`" . implode( '`,`', $fields ) . "`) VALUES (" . implode( ",", $formatted_fields ) . ")";
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return $this->query( $this->prepare( $sql, $data ) );
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$data = $this->process_fields( $table, $data, $format );
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if ( false === $data ) {
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return false;
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}
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$formats = $values = array();
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foreach ( $data as $value ) {
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$formats[] = $value['format'];
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$values[] = $value['value'];
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}
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$fields = '`' . implode( '`, `', array_keys( $data ) ) . '`';
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$formats = implode( ', ', $formats );
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$sql = "$type INTO `$table` ($fields) VALUES ($formats)";
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$this->insert_id = 0;
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$this->check_current_query = false;
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return $this->query( $this->prepare( $sql, $values ) );
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}
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/**
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@ -1731,34 +1798,36 @@ class wpdb {
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* @return int|false The number of rows updated, or false on error.
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*/
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function update( $table, $data, $where, $format = null, $where_format = null ) {
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if ( ! is_array( $data ) || ! is_array( $where ) )
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if ( ! is_array( $data ) || ! is_array( $where ) ) {
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return false;
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$formats = $format = (array) $format;
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$bits = $wheres = array();
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foreach ( (array) array_keys( $data ) as $field ) {
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if ( !empty( $format ) )
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$form = ( $form = array_shift( $formats ) ) ? $form : $format[0];
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elseif ( isset($this->field_types[$field]) )
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$form = $this->field_types[$field];
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else
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$form = '%s';
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$bits[] = "`$field` = {$form}";
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}
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$where_formats = $where_format = (array) $where_format;
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foreach ( (array) array_keys( $where ) as $field ) {
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if ( !empty( $where_format ) )
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$form = ( $form = array_shift( $where_formats ) ) ? $form : $where_format[0];
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elseif ( isset( $this->field_types[$field] ) )
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$form = $this->field_types[$field];
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else
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$form = '%s';
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$wheres[] = "`$field` = {$form}";
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$data = $this->process_fields( $table, $data, $format );
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if ( false === $data ) {
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return false;
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}
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$where = $this->process_fields( $table, $where, $where_format );
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if ( false === $where ) {
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return false;
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}
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$sql = "UPDATE `$table` SET " . implode( ', ', $bits ) . ' WHERE ' . implode( ' AND ', $wheres );
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return $this->query( $this->prepare( $sql, array_merge( array_values( $data ), array_values( $where ) ) ) );
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$fields = $conditions = $values = array();
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foreach ( $data as $field => $value ) {
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$fields[] = "`$field` = " . $value['format'];
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$values[] = $value['value'];
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}
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foreach ( $where as $field => $value ) {
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$conditions[] = "`$field` = " . $value['format'];
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$values[] = $value['value'];
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}
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$fields = implode( ', ', $fields );
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$conditions = implode( ' AND ', $conditions );
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$sql = "UPDATE `$table` SET $fields WHERE $conditions";
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$this->check_current_query = false;
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return $this->query( $this->prepare( $sql, $values ) );
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}
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/**
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@ -1780,29 +1849,134 @@ class wpdb {
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* @return int|false The number of rows updated, or false on error.
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*/
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function delete( $table, $where, $where_format = null ) {
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if ( ! is_array( $where ) )
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if ( ! is_array( $where ) ) {
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return false;
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}
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$bits = $wheres = array();
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$where = $this->process_fields( $table, $where, $where_format );
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if ( false === $where ) {
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return false;
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}
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$where_formats = $where_format = (array) $where_format;
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$conditions = $values = array();
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foreach ( $where as $field => $value ) {
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$conditions[] = "`$field` = " . $value['format'];
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$values[] = $value['value'];
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}
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foreach ( array_keys( $where ) as $field ) {
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if ( !empty( $where_format ) ) {
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$form = ( $form = array_shift( $where_formats ) ) ? $form : $where_format[0];
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$conditions = implode( ' AND ', $conditions );
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$sql = "DELETE FROM `$table` WHERE $conditions";
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$this->check_current_query = false;
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return $this->query( $this->prepare( $sql, $values ) );
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}
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/**
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* Processes arrays of field/value pairs and field formats.
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*
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* This is a helper method for wpdb's CRUD methods, which take field/value
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* pairs for inserts, updates, and where clauses. This method first pairs
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* each value with a format. Then it determines the charset of that field,
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* using that to determine if any invalid text would be stripped. If text is
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* stripped, then field processing is rejected and the query fails.
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*
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* @since 4.2.0
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* @access protected
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*
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* @param string $table Table name.
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* @param array $data Field/value pair.
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* @param mixed $format Format for each field.
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* @return array|bool Returns an array of fields that contain paired values
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* and formats. Returns false for invalid values.
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*/
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protected function process_fields( $table, $data, $format ) {
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$data = $this->process_field_formats( $data, $format );
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$data = $this->process_field_charsets( $data, $table );
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if ( false === $data ) {
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return false;
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}
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$converted_data = $this->strip_invalid_text( $data );
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if ( $data !== $converted_data ) {
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return false;
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}
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return $data;
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}
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/**
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* Prepares arrays of value/format pairs as passed to wpdb CRUD methods.
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*
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* @since 4.2.0
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* @access protected
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*
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* @param array $data Array of fields to values.
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* @param mixed $format Formats to be mapped to the values in $data.
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* @return array Array, keyed by field names with values being an array
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* of 'value' and 'format' keys.
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*/
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protected function process_field_formats( $data, $format ) {
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$formats = $original_formats = (array) $format;
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foreach ( $data as $field => $value ) {
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$value = array(
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'value' => $value,
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'format' => '%s',
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);
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if ( ! empty( $format ) ) {
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$value['format'] = array_shift( $formats );
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if ( ! $value['format'] ) {
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$value['format'] = reset( $original_formats );
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}
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} elseif ( isset( $this->field_types[ $field ] ) ) {
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$form = $this->field_types[ $field ];
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$value['format'] = $this->field_types[ $field ];
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}
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$data[ $field ] = $value;
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}
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return $data;
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}
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/**
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* Adds field charsets to field/value/format arrays generated by
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* the {@see wpdb::process_field_formats()} method.
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*
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* @since 4.2.0
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* @access protected
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*
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* @param array $data As it comes from the {@see wpdb::process_field_formats()} method.
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* @param string $table Table name.
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* @return The same array as $data with additional 'charset' keys.
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*/
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protected function process_field_charsets( $data, $table ) {
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foreach ( $data as $field => $value ) {
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if ( '%d' === $value['format'] || '%f' === $value['format'] ) {
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// We can skip this field if we know it isn't a string.
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// This checks %d/%f versus ! %s because it's sprintf() could take more.
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$value['charset'] = false;
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} elseif ( $this->check_ascii( $value['value'] ) ) {
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// If it's ASCII, then we don't need the charset. We can skip this field.
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$value['charset'] = false;
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} else {
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$form = '%s';
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$value['charset'] = $this->get_col_charset( $table, $field );
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if ( is_wp_error( $value['charset'] ) ) {
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return false;
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}
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$wheres[] = "$field = $form";
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// This isn't ASCII. Don't have strip_invalid_text() re-check.
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$value['ascii'] = false;
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}
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$sql = "DELETE FROM $table WHERE " . implode( ' AND ', $wheres );
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return $this->query( $this->prepare( $sql, $where ) );
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$data[ $field ] = $value;
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}
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return $data;
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}
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/**
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* Retrieve one variable from the database.
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@ -1950,6 +2124,508 @@ class wpdb {
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return null;
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}
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/**
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* Retrieves the character set for the given table.
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*
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* @since 4.2.0
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* @access protected
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*
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* @param string $table Table name.
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* @return string|WP_Error Table character set, {@see WP_Error} object if it couldn't be found.
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*/
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protected function get_table_charset( $table ) {
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$tablekey = strtolower( $table );
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/**
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* Filter the table charset value before the DB is checked.
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*
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* Passing a non-null value to the filter will effectively short-circuit
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* checking the DB for the charset, returning that value instead.
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*
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* @since 4.2.0
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*
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* @param string $charset The character set to use. Default null.
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* @param string $table The name of the table being checked.
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*/
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$charset = apply_filters( 'pre_get_table_charset', null, $table );
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if ( null !== $charset ) {
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return $charset;
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}
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if ( isset( $this->table_charset[ $tablekey ] ) ) {
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return $this->table_charset[ $tablekey ];
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}
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$charsets = $columns = array();
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$results = $this->get_results( "SHOW FULL COLUMNS FROM `$table`" );
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if ( ! $results ) {
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return new WP_Error( 'wpdb_get_table_charset_failure' );
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}
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foreach ( $results as $column ) {
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$columns[ strtolower( $column->Field ) ] = $column;
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}
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$this->col_meta[ $tablekey ] = $columns;
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foreach ( $columns as $column ) {
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if ( ! empty( $column->Collation ) ) {
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list( $charset ) = explode( '_', $column->Collation );
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$charsets[ strtolower( $charset ) ] = true;
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}
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list( $type ) = explode( '(', $column->Type );
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// A binary/blob means the whole query gets treated like this.
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if ( in_array( strtoupper( $type ), array( 'BINARY', 'VARBINARY', 'TINYBLOB', 'MEDIUMBLOB', 'BLOB', 'LONGBLOB' ) ) ) {
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$this->table_charset[ $tablekey ] = 'binary';
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return 'binary';
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}
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}
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// utf8mb3 is an alias for utf8.
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if ( isset( $charsets['utf8mb3'] ) ) {
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$charsets['utf8'] = true;
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unset( $charsets['utf8mb3'] );
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}
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// Check if we have more than one charset in play.
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$count = count( $charsets );
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if ( 1 === $count ) {
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$charset = key( $charsets );
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} elseif ( 0 === $count ) {
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||||
// No charsets, assume this table can store whatever.
|
||||
$charset = false;
|
||||
} else {
|
||||
// More than one charset. Remove latin1 if present and recalculate.
|
||||
unset( $charsets['latin1'] );
|
||||
$count = count( $charsets );
|
||||
if ( 1 === $count ) {
|
||||
// Only one charset (besides latin1).
|
||||
$charset = key( $charsets );
|
||||
} elseif ( 2 === $count && isset( $charsets['utf8'], $charsets['utf8mb4'] ) ) {
|
||||
// Two charsets, but they're utf8 and utf8mb4, use utf8.
|
||||
$charset = 'utf8';
|
||||
} else {
|
||||
// Two mixed character sets. ascii.
|
||||
$charset = 'ascii';
|
||||
}
|
||||
}
|
||||
|
||||
$this->table_charset[ $tablekey ] = $charset;
|
||||
return $charset;
|
||||
}
|
||||
|
||||
/**
|
||||
* Retrieves the character set for the given column.
|
||||
*
|
||||
* @since 4.2.0
|
||||
* @access public
|
||||
*
|
||||
* @param string $table Table name.
|
||||
* @param string $column Column name.
|
||||
* @return mixed Column character set as a string. False if the column has no
|
||||
* character set. {@see WP_Error} object if there was an error.
|
||||
*/
|
||||
public function get_col_charset( $table, $column ) {
|
||||
$tablekey = strtolower( $table );
|
||||
$columnkey = strtolower( $column );
|
||||
|
||||
/**
|
||||
* Filter the column charset value before the DB is checked.
|
||||
*
|
||||
* Passing a non-null value to the filter will short-circuit
|
||||
* checking the DB for the charset, returning that value instead.
|
||||
*
|
||||
* @since 4.2.0
|
||||
*
|
||||
* @param string $charset The character set to use. Default null.
|
||||
* @param string $table The name of the table being checked.
|
||||
* @param string $column The name of the column being checked.
|
||||
*/
|
||||
$charset = apply_filters( 'pre_get_col_charset', null, $table, $column );
|
||||
if ( null !== $charset ) {
|
||||
return $charset;
|
||||
}
|
||||
|
||||
// Skip this entirely if this isn't a MySQL database.
|
||||
if ( false === $this->is_mysql ) {
|
||||
return false;
|
||||
}
|
||||
|
||||
if ( empty( $this->table_charset[ $tablekey ] ) ) {
|
||||
// This primes column information for us.
|
||||
$table_charset = $this->get_table_charset( $table );
|
||||
if ( is_wp_error( $table_charset ) ) {
|
||||
return $table_charset;
|
||||
}
|
||||
}
|
||||
|
||||
// If still no column information, return the table charset.
|
||||
if ( empty( $this->col_meta[ $tablekey ] ) ) {
|
||||
return $this->table_charset[ $tablekey ];
|
||||
}
|
||||
|
||||
// If this column doesn't exist, return the table charset.
|
||||
if ( empty( $this->col_meta[ $tablekey ][ $columnkey ] ) ) {
|
||||
return $this->table_charset[ $tablekey ];
|
||||
}
|
||||
|
||||
// Return false when it's not a string column.
|
||||
if ( empty( $this->col_meta[ $tablekey ][ $columnkey ]->Collation ) ) {
|
||||
return false;
|
||||
}
|
||||
|
||||
list( $charset ) = explode( '_', $this->col_meta[ $tablekey ][ $columnkey ]->Collation );
|
||||
return $charset;
|
||||
}
|
||||
|
||||
/**
|
||||
* Check if a string is ASCII.
|
||||
*
|
||||
* The negative regex is faster for non-ASCII strings, as it allows
|
||||
* the search to finish as soon as it encounters a non-ASCII character.
|
||||
*
|
||||
* @since 4.2.0
|
||||
* @access protected
|
||||
*
|
||||
* @param string $string String to check.
|
||||
* @return bool True if ASCII, false if not.
|
||||
*/
|
||||
protected function check_ascii( $string ) {
|
||||
if ( function_exists( 'mb_check_encoding' ) ) {
|
||||
if ( mb_check_encoding( $string, 'ASCII' ) ) {
|
||||
return true;
|
||||
}
|
||||
} elseif ( ! preg_match( '/[^\x00-\x7F]/', $string ) ) {
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* Check if the query is accessing a collation considered safe on the current version of MySQL.
|
||||
*
|
||||
* @since 4.2.0
|
||||
* @access protected
|
||||
*
|
||||
* @param string $query The query to check.
|
||||
* @return bool True if the collation is safe, false if it isn't.
|
||||
*/
|
||||
protected function check_safe_collation( $query ) {
|
||||
if ( $this->checking_collation ) {
|
||||
return true;
|
||||
}
|
||||
$table = $this->get_table_from_query( $query );
|
||||
if ( ! $table ) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$this->checking_collation = true;
|
||||
$this->get_table_charset( $table );
|
||||
$this->checking_collation = false;
|
||||
|
||||
$table = strtolower( $table );
|
||||
if ( empty( $this->col_meta[ $table ] ) ) {
|
||||
return false;
|
||||
}
|
||||
|
||||
foreach( $this->col_meta[ $table ] as $col ) {
|
||||
if ( empty( $col->Collation ) ) {
|
||||
continue;
|
||||
}
|
||||
|
||||
if ( ! in_array( $col->Collation, array( 'utf8_general_ci', 'utf8_bin', 'utf8mb4_general_ci', 'utf8mb4_bin' ), true ) ) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* Strips any invalid characters based on value/charset pairs.
|
||||
*
|
||||
* @since 4.2.0
|
||||
* @access protected
|
||||
*
|
||||
* @param array $data Array of value arrays. Each value array has the keys
|
||||
* 'value' and 'charset'. An optional 'ascii' key can be
|
||||
* set to false to avoid redundant ASCII checks.
|
||||
* @return array|WP_Error The $data parameter, with invalid characters removed from
|
||||
* each value. This works as a passthrough: any additional keys
|
||||
* such as 'field' are retained in each value array. If we cannot
|
||||
* remove invalid characters, a {@see WP_Error} object is returned.
|
||||
*/
|
||||
protected function strip_invalid_text( $data ) {
|
||||
// Some multibyte character sets that we can check in PHP.
|
||||
$mb_charsets = array(
|
||||
'ascii' => 'ASCII',
|
||||
'big5' => 'BIG-5',
|
||||
'eucjpms' => 'eucJP-win',
|
||||
'gb2312' => 'EUC-CN',
|
||||
'ujis' => 'EUC-JP',
|
||||
'utf32' => 'UTF-32',
|
||||
);
|
||||
|
||||
$supported_charsets = array();
|
||||
if ( function_exists( 'mb_list_encodings' ) ) {
|
||||
$supported_charsets = mb_list_encodings();
|
||||
}
|
||||
|
||||
$db_check_string = false;
|
||||
|
||||
foreach ( $data as &$value ) {
|
||||
$charset = $value['charset'];
|
||||
|
||||
// Column isn't a string, or is latin1, which will will happily store anything.
|
||||
if ( false === $charset || 'latin1' === $charset ) {
|
||||
continue;
|
||||
}
|
||||
|
||||
if ( ! is_string( $value['value'] ) ) {
|
||||
continue;
|
||||
}
|
||||
|
||||
// ASCII is always OK.
|
||||
if ( ! isset( $value['ascii'] ) && $this->check_ascii( $value['value'] ) ) {
|
||||
continue;
|
||||
}
|
||||
|
||||
// Convert the text locally.
|
||||
if ( $supported_charsets ) {
|
||||
if ( isset( $mb_charsets[ $charset ] ) && in_array( $mb_charsets[ $charset ], $supported_charsets ) ) {
|
||||
$value['value'] = mb_convert_encoding( $value['value'], $mb_charsets[ $charset ], $mb_charsets[ $charset ] );
|
||||
continue;
|
||||
}
|
||||
}
|
||||
|
||||
// utf8 can be handled by regex, which is a bunch faster than a DB lookup.
|
||||
if ( 'utf8' === $charset || 'utf8mb3' === $charset || 'utf8mb4' === $charset ) {
|
||||
$regex = '/
|
||||
(
|
||||
(?: [\x00-\x7F] # single-byte sequences 0xxxxxxx
|
||||
| [\xC2-\xDF][\x80-\xBF] # double-byte sequences 110xxxxx 10xxxxxx
|
||||
| \xE0[\xA0-\xBF][\x80-\xBF] # triple-byte sequences 1110xxxx 10xxxxxx * 2
|
||||
| [\xE1-\xEC][\x80-\xBF]{2}
|
||||
| \xED[\x80-\x9F][\x80-\xBF]
|
||||
| [\xEE-\xEF][\x80-\xBF]{2}';
|
||||
|
||||
if ( 'utf8mb4' === $charset) {
|
||||
$regex .= '
|
||||
| \xF0[\x90-\xBF][\x80-\xBF]{2} # four-byte sequences 11110xxx 10xxxxxx * 3
|
||||
| [\xF1-\xF3][\x80-\xBF]{3}
|
||||
| \xF4[\x80-\x8F][\x80-\xBF]{2}
|
||||
';
|
||||
}
|
||||
|
||||
$regex .= '){1,50} # ...one or more times
|
||||
)
|
||||
| . # anything else
|
||||
/x';
|
||||
$value['value'] = preg_replace( $regex, '$1', $value['value'] );
|
||||
continue;
|
||||
}
|
||||
|
||||
// We couldn't use any local conversions, send it to the DB.
|
||||
$value['db'] = $db_check_string = true;
|
||||
}
|
||||
unset( $value ); // Remove by reference.
|
||||
|
||||
if ( $db_check_string ) {
|
||||
$queries = array();
|
||||
foreach ( $data as $col => $value ) {
|
||||
if ( ! empty( $value['db'] ) ) {
|
||||
if ( ! isset( $queries[ $value['charset'] ] ) ) {
|
||||
$queries[ $value['charset'] ] = array();
|
||||
}
|
||||
|
||||
// Split the CONVERT() calls by charset, so we can make sure the connection is right
|
||||
$queries[ $value['charset'] ][ $col ] = $this->prepare( "CONVERT( %s USING {$value['charset']} )", $value['value'] );
|
||||
}
|
||||
}
|
||||
|
||||
$connection_charset = $this->charset;
|
||||
foreach ( $queries as $charset => $query ) {
|
||||
if ( ! $query ) {
|
||||
continue;
|
||||
}
|
||||
|
||||
// Change the charset to match the string(s) we're converting
|
||||
if ( $charset !== $connection_charset ) {
|
||||
$connection_charset = $charset;
|
||||
$this->set_charset( $this->dbh, $charset );
|
||||
}
|
||||
|
||||
$this->check_current_query = false;
|
||||
|
||||
$row = $this->get_row( "SELECT " . implode( ', ', $query ), ARRAY_N );
|
||||
if ( ! $row ) {
|
||||
$this->set_charset( $this->dbh, $connection_charset );
|
||||
return new WP_Error( 'wpdb_strip_invalid_text_failure' );
|
||||
}
|
||||
|
||||
$cols = array_keys( $query );
|
||||
$col_count = count( $cols );
|
||||
for ( $ii = 0; $ii < $col_count; $ii++ ) {
|
||||
$data[ $cols[ $ii ] ]['value'] = $row[ $ii ];
|
||||
}
|
||||
}
|
||||
|
||||
// Don't forget to change the charset back!
|
||||
if ( $connection_charset !== $this->charset ) {
|
||||
$this->set_charset( $this->dbh );
|
||||
}
|
||||
}
|
||||
|
||||
return $data;
|
||||
}
|
||||
|
||||
/**
|
||||
* Strips any invalid characters from the query.
|
||||
*
|
||||
* @since 4.2.0
|
||||
* @access protected
|
||||
*
|
||||
* @param string $query Query to convert.
|
||||
* @return string|WP_Error The converted query, or a {@see WP_Error} object if the conversion fails.
|
||||
*/
|
||||
protected function strip_invalid_text_from_query( $query ) {
|
||||
$table = $this->get_table_from_query( $query );
|
||||
if ( $table ) {
|
||||
$charset = $this->get_table_charset( $table );
|
||||
if ( is_wp_error( $charset ) ) {
|
||||
return $charset;
|
||||
}
|
||||
|
||||
// We can't reliably strip text from tables containing binary/blob columns
|
||||
if ( 'binary' === $charset ) {
|
||||
return $query;
|
||||
}
|
||||
} else {
|
||||
$charset = $this->charset;
|
||||
}
|
||||
|
||||
$data = array(
|
||||
'value' => $query,
|
||||
'charset' => $charset,
|
||||
'ascii' => false,
|
||||
);
|
||||
|
||||
$data = $this->strip_invalid_text( array( $data ) );
|
||||
if ( is_wp_error( $data ) ) {
|
||||
return $data;
|
||||
}
|
||||
|
||||
return $data[0]['value'];
|
||||
}
|
||||
|
||||
/**
|
||||
* Strips any invalid characters from the string for a given table and column.
|
||||
*
|
||||
* @since 4.2.0
|
||||
* @access public
|
||||
*
|
||||
* @param string $table Table name.
|
||||
* @param string $column Column name.
|
||||
* @param string $value The text to check.
|
||||
* @return string|WP_Error The converted string, or a `WP_Error` object if the conversion fails.
|
||||
*/
|
||||
public function strip_invalid_text_for_column( $table, $column, $value ) {
|
||||
if ( ! is_string( $value ) || $this->check_ascii( $value ) ) {
|
||||
return $value;
|
||||
}
|
||||
|
||||
$charset = $this->get_col_charset( $table, $column );
|
||||
if ( ! $charset ) {
|
||||
// Not a string column.
|
||||
return $value;
|
||||
} elseif ( is_wp_error( $charset ) ) {
|
||||
// Bail on real errors.
|
||||
return $charset;
|
||||
}
|
||||
|
||||
$data = array(
|
||||
$column => array(
|
||||
'value' => $value,
|
||||
'charset' => $charset,
|
||||
'ascii' => false,
|
||||
)
|
||||
);
|
||||
|
||||
$data = $this->strip_invalid_text( $data );
|
||||
if ( is_wp_error( $data ) ) {
|
||||
return $data;
|
||||
}
|
||||
|
||||
return $data[ $column ]['value'];
|
||||
}
|
||||
|
||||
/**
|
||||
* Find the first table name referenced in a query.
|
||||
*
|
||||
* @since 4.2.0
|
||||
* @access protected
|
||||
*
|
||||
* @param string $query The query to search.
|
||||
* @return string|false $table The table name found, or false if a table couldn't be found.
|
||||
*/
|
||||
protected function get_table_from_query( $query ) {
|
||||
// Remove characters that can legally trail the table name.
|
||||
$query = rtrim( $query, ';/-#' );
|
||||
|
||||
// Allow (select...) union [...] style queries. Use the first query's table name.
|
||||
$query = ltrim( $query, "\r\n\t (" );
|
||||
|
||||
/*
|
||||
* Strip everything between parentheses except nested selects and use only 1,000
|
||||
* chars of the query.
|
||||
*/
|
||||
$query = preg_replace( '/\((?!\s*select)[^(]*?\)/is', '()', substr( $query, 0, 1000 ) );
|
||||
|
||||
// Quickly match most common queries.
|
||||
if ( preg_match( '/^\s*(?:'
|
||||
. 'SELECT.*?\s+FROM'
|
||||
. '|INSERT(?:\s+LOW_PRIORITY|\s+DELAYED|\s+HIGH_PRIORITY)?(?:\s+IGNORE)?(?:\s+INTO)?'
|
||||
. '|REPLACE(?:\s+LOW_PRIORITY|\s+DELAYED)?(?:\s+INTO)?'
|
||||
. '|UPDATE(?:\s+LOW_PRIORITY)?(?:\s+IGNORE)?'
|
||||
. '|DELETE(?:\s+LOW_PRIORITY|\s+QUICK|\s+IGNORE)*(?:\s+FROM)?'
|
||||
. ')\s+`?([\w-]+)`?/is', $query, $maybe ) ) {
|
||||
return $maybe[1];
|
||||
}
|
||||
|
||||
// SHOW TABLE STATUS and SHOW TABLES
|
||||
if ( preg_match( '/^\s*(?:'
|
||||
. 'SHOW\s+TABLE\s+STATUS.+(?:LIKE\s+|WHERE\s+Name\s*=\s*)'
|
||||
. '|SHOW\s+(?:FULL\s+)?TABLES.+(?:LIKE\s+|WHERE\s+Name\s*=\s*)'
|
||||
. ')\W([\w-]+)\W/is', $query, $maybe ) ) {
|
||||
return $maybe[1];
|
||||
}
|
||||
|
||||
// Big pattern for the rest of the table-related queries.
|
||||
if ( preg_match( '/^\s*(?:'
|
||||
. '(?:EXPLAIN\s+(?:EXTENDED\s+)?)?SELECT.*?\s+FROM'
|
||||
. '|DESCRIBE|DESC|EXPLAIN|HANDLER'
|
||||
. '|(?:LOCK|UNLOCK)\s+TABLE(?:S)?'
|
||||
. '|(?:RENAME|OPTIMIZE|BACKUP|RESTORE|CHECK|CHECKSUM|ANALYZE|REPAIR).*\s+TABLE'
|
||||
. '|TRUNCATE(?:\s+TABLE)?'
|
||||
. '|CREATE(?:\s+TEMPORARY)?\s+TABLE(?:\s+IF\s+NOT\s+EXISTS)?'
|
||||
. '|ALTER(?:\s+IGNORE)?\s+TABLE'
|
||||
. '|DROP\s+TABLE(?:\s+IF\s+EXISTS)?'
|
||||
. '|CREATE(?:\s+\w+)?\s+INDEX.*\s+ON'
|
||||
. '|DROP\s+INDEX.*\s+ON'
|
||||
. '|LOAD\s+DATA.*INFILE.*INTO\s+TABLE'
|
||||
. '|(?:GRANT|REVOKE).*ON\s+TABLE'
|
||||
. '|SHOW\s+(?:.*FROM|.*TABLE)'
|
||||
. ')\s+\(*\s*`?([\w-]+)`?\s*\)*/is', $query, $maybe ) ) {
|
||||
return $maybe[1];
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* Load the column metadata from the last query.
|
||||
*
|
||||
|
|
|
|||
Loading…
Reference in New Issue