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0, 'date_filter' => '', 'date_start' => 0, 'offset' => 0, 'order' => 'desc', 'orderby' => 'modified', 'per_page' => 20, 'source' => '', ); /** * Default values for arguments for the search_within_files method. * * @const array */ public const DEFAULTS_SEARCH_WITHIN_FILES = array( 'offset' => 0, 'per_page' => 50, ); /** * The maximum number of files that can be searched at one time. * * @const int */ public const SEARCH_MAX_FILES = 100; /** * The maximum number of search results that can be returned at one time. * * @const int */ public const SEARCH_MAX_RESULTS = 200; /** * The cache group name to use for caching operations. * * @const string */ private const CACHE_GROUP = 'log-files'; /** * A cache key for storing and retrieving the results of the last logs search. * * @const string */ private const SEARCH_CACHE_KEY = 'logs_previous_search'; /** * Get the file size limit that determines when to rotate a file. * * @return int */ private function get_file_size_limit(): int { $default = 5 * MB_IN_BYTES; /** * Filter the threshold size of a log file at which point it will get rotated. * * @since 3.4.0 * * @param int $file_size_limit The file size limit in bytes. */ $file_size_limit = apply_filters( 'woocommerce_log_file_size_limit', $default ); if ( ! is_int( $file_size_limit ) || $file_size_limit < 1 ) { return $default; } return $file_size_limit; } /** * Write a log entry to the appropriate file, after rotating the file if necessary. * * @param string $source The source property of the log entry, which determines which file to write to. * @param string $text The contents of the log entry to add to a file. * @param int|null $time Optional. The time of the log entry as a Unix timestamp. Defaults to the current time. * * @return bool True if the contents were successfully written to the file. */ public function write_to_file( string $source, string $text, ?int $time = null ): bool { if ( is_null( $time ) ) { $time = time(); } $path = Settings::get_log_directory() . $this->generate_filename( $source, $time ); $file = new File( $path ); $size = $file->get_file_size(); if ( false !== $size && $size >= $this->get_file_size_limit() ) { if ( ! $this->rotate_file( $file ) ) { return false; } $file = new File( $path ); } return $file->write( $text ); } /** * Generate the full name of a file based on source and date values. * * @param string $source The source property of a log entry, which determines the filename. * @param int $time The time of the log entry as a Unix timestamp. * * @return string */ private function generate_filename( string $source, int $time ): string { $file_id = File::generate_file_id( $source, null, $time ); $hash = File::generate_hash( $file_id ); return "$file_id-$hash.log"; } /** * Get all the rotations of a file and increment them, so that they overwrite the previous file with that rotation. * * @param File $file The un-rotated ("current") iteration of the file to rotate. * * @return bool True if the file and all its rotations were successfully rotated. */ private function rotate_file( File $file ): bool { $rotations = $this->get_rotation_siblings( $file ); $max_rotation_marker = self::MAX_FILE_ROTATIONS - 1; // Don't rotate a file with the maximum rotation. unset( $rotations[ $max_rotation_marker ] ); $results = array(); // Rotate starting with oldest first and working backwards. for ( $i = $max_rotation_marker; $i >= 0; $i -- ) { if ( isset( $rotations[ $i ] ) ) { $results[] = $rotations[ $i ]->rotate(); } } $results[] = $file->rotate(); return ! in_array( false, $results, true ); } /** * Get an array of log files. * * @param array $args { * Optional. Arguments to filter and sort the files that are returned. * * @type int $date_end The end of the date range to filter by, as a Unix timestamp. * @type string $date_filter Filter files by one of the date props. 'created' or 'modified'. * @type int $date_start The beginning of the date range to filter by, as a Unix timestamp. * @type int $offset Omit this number of files from the beginning of the list. Works with $per_page to do pagination. * @type string $order The sort direction. 'asc' or 'desc'. Defaults to 'desc'. * @type string $orderby The property to sort the list by. 'created', 'modified', 'source', 'size'. Defaults to 'modified'. * @type int $per_page The number of files to include in the list. Works with $offset to do pagination. * @type string $source Only include files from this source. * } * @param bool $count_only Optional. True to return a total count of the files. * * @return File[]|int|WP_Error */ public function get_files( array $args = array(), bool $count_only = false ) { $args = wp_parse_args( $args, self::DEFAULTS_GET_FILES ); $pattern = $args['source'] . '*.log'; $paths = glob( Settings::get_log_directory() . $pattern ); if ( false === $paths ) { return new WP_Error( 'wc_log_directory_error', __( 'Could not access the log file directory.', 'woocommerce' ) ); } $files = $this->convert_paths_to_objects( $paths ); if ( $args['date_filter'] && $args['date_start'] && $args['date_end'] ) { switch ( $args['date_filter'] ) { case 'created': $files = array_filter( $files, fn( $file ) => $file->get_created_timestamp() >= $args['date_start'] && $file->get_created_timestamp() <= $args['date_end'] ); break; case 'modified': $files = array_filter( $files, fn( $file ) => $file->get_modified_timestamp() >= $args['date_start'] && $file->get_modified_timestamp() <= $args['date_end'] ); break; } } if ( true === $count_only ) { return count( $files ); } $multi_sorter = function( $sort_sets, $order_sets ) { $comparison = 0; while ( ! empty( $sort_sets ) ) { $set = array_shift( $sort_sets ); $order = array_shift( $order_sets ); if ( 'desc' === $order ) { $comparison = $set[1] <=> $set[0]; } else { $comparison = $set[0] <=> $set[1]; } if ( 0 !== $comparison ) { break; } } return $comparison; }; switch ( $args['orderby'] ) { case 'created': $sort_callback = function( $a, $b ) use ( $args, $multi_sorter ) { $sort_sets = array( array( $a->get_created_timestamp(), $b->get_created_timestamp() ), array( $a->get_source(), $b->get_source() ), array( $a->get_rotation() || -1, $b->get_rotation() || -1 ), ); $order_sets = array( $args['order'], 'asc', 'asc' ); return $multi_sorter( $sort_sets, $order_sets ); }; break; case 'modified': $sort_callback = function( $a, $b ) use ( $args, $multi_sorter ) { $sort_sets = array( array( $a->get_modified_timestamp(), $b->get_modified_timestamp() ), array( $a->get_source(), $b->get_source() ), array( $a->get_rotation() || -1, $b->get_rotation() || -1 ), ); $order_sets = array( $args['order'], 'asc', 'asc' ); return $multi_sorter( $sort_sets, $order_sets ); }; break; case 'source': $sort_callback = function( $a, $b ) use ( $args, $multi_sorter ) { $sort_sets = array( array( $a->get_source(), $b->get_source() ), array( $a->get_created_timestamp(), $b->get_created_timestamp() ), array( $a->get_rotation() || -1, $b->get_rotation() || -1 ), ); $order_sets = array( $args['order'], 'desc', 'asc' ); return $multi_sorter( $sort_sets, $order_sets ); }; break; case 'size': $sort_callback = function( $a, $b ) use ( $args, $multi_sorter ) { $sort_sets = array( array( $a->get_file_size(), $b->get_file_size() ), array( $a->get_source(), $b->get_source() ), array( $a->get_rotation() || -1, $b->get_rotation() || -1 ), ); $order_sets = array( $args['order'], 'asc', 'asc' ); return $multi_sorter( $sort_sets, $order_sets ); }; break; } usort( $files, $sort_callback ); return array_slice( $files, $args['offset'], $args['per_page'] ); } /** * Get one or more File instances from an array of file IDs. * * @param array $file_ids An array of file IDs (file basename without the hash). * * @return File[] */ public function get_files_by_id( array $file_ids ): array { $log_directory = Settings::get_log_directory(); $paths = array(); foreach ( $file_ids as $file_id ) { // Look for the standard filename format first, which includes a hash. $glob = glob( $log_directory . $file_id . '-*.log' ); if ( ! $glob ) { $glob = glob( $log_directory . $file_id . '.log' ); } if ( is_array( $glob ) ) { $paths = array_merge( $paths, $glob ); } } $files = $this->convert_paths_to_objects( array_unique( $paths ) ); return $files; } /** * Get a File instance from a file ID. * * @param string $file_id A file ID (file basename without the hash). * * @return File|WP_Error */ public function get_file_by_id( string $file_id ) { $result = $this->get_files_by_id( array( $file_id ) ); if ( count( $result ) < 1 ) { return new WP_Error( 'wc_log_file_error', esc_html__( 'This file does not exist.', 'woocommerce' ) ); } if ( count( $result ) > 1 ) { return new WP_Error( 'wc_log_file_error', esc_html__( 'Multiple files match this ID.', 'woocommerce' ) ); } return reset( $result ); } /** * Get File instances for a given file ID and all of its related rotations. * * @param string $file_id A file ID (file basename without the hash). * * @return File[]|WP_Error An associative array where the rotation integer of the file is the key, and a "current" * key for the iteration of the file that hasn't been rotated (if it exists). */ public function get_file_rotations( string $file_id ) { $file = $this->get_file_by_id( $file_id ); if ( is_wp_error( $file ) ) { return $file; } $current = array(); if ( is_null( $file->get_rotation() ) ) { $current['current'] = $file; } else { $current_file_id = File::generate_file_id( $file->get_source(), null, $this->get_filename_timestamp( $file ) ); $result = $this->get_file_by_id( $current_file_id ); if ( ! is_wp_error( $result ) ) { $current['current'] = $result; } } return array_merge( $current, $this->get_rotation_siblings( $file ) ); } /** * Get the creation timestamp encoded in a file's name, or 0 if it doesn't use the standard format. * * @param File $file The file to get the timestamp from. * * @return int */ private function get_filename_timestamp( File $file ): int { return $file->has_standard_filename() ? $file->get_created_timestamp() : 0; } /** * Get File instances for the existing rotations of a file. * * @param File $file Any iteration of a file, from which the source and creation date are taken. * * @return File[] An associative array where the rotation integer of the file is the key, sorted by rotation. */ private function get_rotation_siblings( File $file ): array { $source = $file->get_source(); $created = $this->get_filename_timestamp( $file ); $rotations_pattern = sprintf( '.[%s]', implode( '', range( 0, self::MAX_FILE_ROTATIONS - 1 ) ) ); $created_pattern = $created ? '-' . gmdate( 'Y-m-d', $created ) . '-' : ''; $rotation_pattern = Settings::get_log_directory() . $source . $rotations_pattern . $created_pattern . '*.log'; $rotation_paths = glob( $rotation_pattern ); $rotation_files = $this->convert_paths_to_objects( $rotation_paths ); $rotations = array(); foreach ( $rotation_files as $rotation_file ) { if ( $rotation_file->is_readable() ) { $rotations[ $rotation_file->get_rotation() ] = $rotation_file; } } ksort( $rotations ); return $rotations; } /** * Helper method to get an array of File instances. * * @param array $paths An array of absolute file paths. * * @return File[] */ private function convert_paths_to_objects( array $paths ): array { $files = array_map( function( $path ) { $file = new File( $path ); return $file->is_readable() ? $file : null; }, $paths ); return array_filter( $files ); } /** * Get a list of sources for existing log files. * * @return array|WP_Error */ public function get_file_sources() { $paths = glob( Settings::get_log_directory() . '*.log' ); if ( false === $paths ) { return new WP_Error( 'wc_log_directory_error', __( 'Could not access the log file directory.', 'woocommerce' ) ); } $all_sources = array_map( function( $path ) { $file = new File( $path ); return $file->is_readable() ? $file->get_source() : null; }, $paths ); return array_unique( array_filter( $all_sources ) ); } /** * Delete one or more files from the filesystem. * * @param array $file_ids An array of file IDs (file basename without the hash). * * @return int The number of files that were deleted. */ public function delete_files( array $file_ids ): int { $deleted = 0; $files = $this->get_files_by_id( $file_ids ); foreach ( $files as $file ) { $result = $file->delete(); if ( true === $result ) { $deleted ++; } } if ( $deleted > 0 ) { $this->invalidate_cache(); } return $deleted; } /** * Delete files of a given source that were last modified before a given time. * * Files are enumerated lazily and are neither sorted nor turned into File instances, so this * stays cheap on directories holding a large number of files, unlike get_files(). * * @param string $source Match files whose name begins with this source. * @param int $modified_before Only delete files modified before this Unix timestamp. * @param int $limit The maximum number of files to delete. * * @return int The number of files that were deleted. */ public function delete_stale_files( string $source, int $modified_before, int $limit ): int { if ( '' === $source || $limit < 1 ) { return 0; } try { $filesystem = FilesystemUtil::get_wp_filesystem_direct(); $iterator = new \FilesystemIterator( Settings::get_log_directory(), \FilesystemIterator::SKIP_DOTS | \FilesystemIterator::CURRENT_AS_PATHNAME | \FilesystemIterator::KEY_AS_FILENAME ); } catch ( Exception $exception ) { // Surface this so a persistent failure to reach the log directory doesn't stay silent. wc_get_logger()->warning( sprintf( 'Could not enumerate the log directory to delete stale "%1$s" files: %2$s', $source, $exception->getMessage() ), array( 'source' => 'wc-logs-cleanup' ) ); return 0; } $deleted = 0; foreach ( $iterator as $basename => $path ) { if ( ! str_starts_with( (string) $basename, $source ) || ! str_ends_with( (string) $basename, '.log' ) ) { continue; } $path = (string) $path; $modified = $filesystem->mtime( $path ); if ( false === $modified || $modified >= $modified_before ) { continue; } if ( $filesystem->delete( $path, false, 'f' ) ) { ++$deleted; } if ( $deleted >= $limit ) { break; } } if ( $deleted > 0 ) { $this->invalidate_cache(); } return $deleted; } /** * Stream a single file to the browser without zipping it first. * * @param string $file_id A file ID (file basename without the hash). * * @return WP_Error|void Only returns something if there is an error. */ public function export_single_file( $file_id ) { $file = $this->get_file_by_id( $file_id ); if ( is_wp_error( $file ) ) { return $file; } $file_name = $file->get_file_id() . '.log'; $exporter = new FileExporter( $file->get_path(), $file_name ); return $exporter->emit_file(); } /** * Create a zip archive of log files and stream it to the browser. * * @param array $file_ids An array of file IDs (file basename without the hash). * * @return WP_Error|void Only returns something if there is an error. */ public function export_multiple_files( array $file_ids ) { $files = $this->get_files_by_id( $file_ids ); if ( count( $files ) < 1 ) { return new WP_Error( 'wc_logs_invalid_file', __( 'Could not access the specified files.', 'woocommerce' ) ); } $temp_dir = get_temp_dir(); if ( ! is_dir( $temp_dir ) || ! wp_is_writable( $temp_dir ) ) { return new WP_Error( 'wc_logs_invalid_directory', __( 'Could not write to the temp directory. Try downloading files one at a time instead.', 'woocommerce' ) ); } require_once ABSPATH . 'wp-admin/includes/class-pclzip.php'; $path = trailingslashit( $temp_dir ) . 'woocommerce_logs_' . gmdate( 'Y-m-d_H-i-s' ) . '.zip'; $file_paths = array_map( fn( $file ) => $file->get_path(), $files ); $archive = new PclZip( $path ); $archive->create( $file_paths, PCLZIP_OPT_REMOVE_ALL_PATH ); $exporter = new FileExporter( $path ); return $exporter->emit_file(); } /** * Search within a set of log files for a particular string. * * @param string $search The string to search for. * @param array $args Optional. Arguments for pagination of search results. * @param array $file_args Optional. Arguments to filter and sort the files that are returned. See get_files(). * @param bool $count_only Optional. True to return a total count of the matches. * * @return array|int|WP_Error When matches are found, each array item is an associative array that includes the * file ID, line number, and the matched string with HTML markup around the matched parts. */ public function search_within_files( string $search, array $args = array(), array $file_args = array(), bool $count_only = false ) { if ( '' === $search ) { return $count_only ? 0 : array(); } $search = esc_html( $search ); $args = wp_parse_args( $args, self::DEFAULTS_SEARCH_WITHIN_FILES ); $file_args = array_merge( $file_args, array( 'offset' => 0, 'per_page' => self::SEARCH_MAX_FILES, ) ); $cache_key = WC_Cache_Helper::get_prefixed_key( self::SEARCH_CACHE_KEY, self::CACHE_GROUP ); $query = wp_json_encode( array( $search, $args, $file_args ) ); $cache = wp_cache_get( $cache_key ); $is_cached = isset( $cache['query'], $cache['results'] ) && $query === $cache['query']; if ( true === $is_cached ) { $matched_lines = $cache['results']; } else { $files = $this->get_files( $file_args ); if ( is_wp_error( $files ) ) { return $files; } // Max string size * SEARCH_MAX_RESULTS = ~1MB largest possible cache entry. $max_string_size = 5 * KB_IN_BYTES; $matched_lines = array(); foreach ( $files as $file ) { $stream = $file->get_stream(); $line_number = 1; while ( ! feof( $stream ) ) { $line = fgets( $stream, $max_string_size ); if ( ! is_string( $line ) ) { continue; } $sanitized_line = esc_html( trim( $line ) ); if ( false !== stripos( $sanitized_line, $search ) ) { $matched_lines[] = array( 'file_id' => $file->get_file_id(), 'line_number' => $line_number, 'line' => $sanitized_line, ); } if ( count( $matched_lines ) >= self::SEARCH_MAX_RESULTS ) { $file->close_stream(); break 2; } if ( false !== strstr( $line, PHP_EOL ) ) { $line_number ++; } } $file->close_stream(); } $to_cache = array( 'query' => $query, 'results' => $matched_lines, ); wp_cache_set( $cache_key, $to_cache, self::CACHE_GROUP, DAY_IN_SECONDS ); } if ( true === $count_only ) { return count( $matched_lines ); } return array_slice( $matched_lines, $args['offset'], $args['per_page'] ); } /** * Calculate the size, in bytes, of the log directory. * * @return int */ public function get_log_directory_size(): int { $bytes = 0; $path = realpath( Settings::get_log_directory( false ) ); if ( empty( $path ) ) { return 0; } if ( wp_is_writable( $path ) ) { $iterator = new \RecursiveIteratorIterator( new \RecursiveDirectoryIterator( $path, \FilesystemIterator::SKIP_DOTS ), \RecursiveIteratorIterator::CATCH_GET_CHILD ); foreach ( $iterator as $file ) { $bytes += $file->getSize(); } } return $bytes; } /** * Invalidate the cache group related to log file data. * * @return bool True on successfully invalidating the cache. */ public function invalidate_cache(): bool { return WC_Cache_Helper::invalidate_cache_group( self::CACHE_GROUP ); } }