383 lines
8.5 KiB
PHP
383 lines
8.5 KiB
PHP
<?php
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/**
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* This class handles logging errors to files.
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*
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* @package WPCode
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*/
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if ( ! defined( 'ABSPATH' ) ) {
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exit; // Exit if accessed directly.
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}
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/**
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* WPCode_File_Logger class.
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*/
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class WPCode_File_Logger {
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/**
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* Open file handlers.
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*
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* @var array
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*/
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protected $handles = array();
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/**
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* Limit for log file size.
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*
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* @var int
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*/
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public $log_size_limit;
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/**
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* Cache logs that could not be written directly for writing them later.
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*
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* @var array
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*/
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protected $cached_logs = array();
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/**
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* Whether logging is enabled.
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*
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* @var bool
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*/
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public $enabled;
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/**
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* Constructor.
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*
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* @param int $log_size_limit File size limit for log files in bytes.
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*/
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public function __construct( $log_size_limit = null ) {
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if ( null === $log_size_limit ) {
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$log_size_limit = 5 * 1024 * 1024;
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}
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$this->log_size_limit = apply_filters( 'wpcode_log_file_size_limit', $log_size_limit );
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add_action( 'plugins_loaded', array( $this, 'write_cached_logs' ) );
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}
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/**
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* Close all open file handles.
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*/
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public function __destruct() {
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foreach ( $this->handles as $handle ) {
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if ( is_resource( $handle ) ) {
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fclose( $handle ); // @codingStandardsIgnoreLine.
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}
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}
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}
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/**
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* Write cached logs.
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*/
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public function write_cached_logs() {
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foreach ( $this->cached_logs as $log ) {
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$this->write( $log['entry'], $log['handle'] );
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}
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}
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/**
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* Format an entry for the log file.
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*
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* @param int $timestamp The timestamp for the log entry.
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* @param string $message The error message.
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*
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* @return mixed|void
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*/
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public function format_entry( $timestamp, $message ) {
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$time_string = date( 'c', $timestamp );// phpcs:ignore WordPress.DateTime.RestrictedFunctions.date_date
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$entry = "{$time_string} {$message}";
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return apply_filters(
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'wpcode_format_log_entry',
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$entry,
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array(
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'timestamp' => $timestamp,
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'message' => $message,
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)
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);
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}
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/**
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* Handle a direct request to log something & format it before writing.
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*
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* @param int $timestamp The timestamp for the log entry.
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* @param string $message The error message.
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* @param string $handle The log handle.
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*
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* @return void
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*/
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public function handle( $timestamp, $message, $handle ) {
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if ( ! $this->is_enabled() ) {
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return;
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}
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$entry = $this->format_entry( $timestamp, $message );
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$this->write( $entry, $handle );
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}
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/**
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* Write an entry to a log file by its handle.
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*
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* @param string $entry The entry text.
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* @param string $handle The log handle.
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*
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* @return bool
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*/
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public function write( $entry, $handle ) {
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$result = false;
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if ( $this->should_rotate( $handle ) ) {
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$this->log_rotate( $handle );
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}
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if ( $this->open( $handle ) && is_resource( $this->handles[ $handle ] ) ) {
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$result = fwrite( $this->handles[ $handle ], $entry . PHP_EOL ); // @codingStandardsIgnoreLine.
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} else {
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$this->cache_log( $entry, $handle );
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}
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return false !== $result;
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}
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/**
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* Should the log file be rotated? Returns true if the file is above the size limit.
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*
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* @param string $handle Log handle.
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*
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* @return bool
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*/
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public function should_rotate( $handle ) {
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$file = self::get_file_path( $handle );
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if ( $file ) {
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if ( $this->is_open( $handle ) ) {
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$file_stat = fstat( $this->handles[ $handle ] );
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return $file_stat['size'] > $this->log_size_limit;
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} elseif ( file_exists( $file ) ) {
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return filesize( $file ) > $this->log_size_limit;
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} else {
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return false;
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}
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} else {
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return false;
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}
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}
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/**
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* Rotate log files by adding a suffix up to 10.
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*
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* @param string $handle Log handle.
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*/
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protected function log_rotate( $handle ) {
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for ( $i = 8; $i >= 0; $i -- ) {
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$this->increment_log_infix( $handle, $i );
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}
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$this->increment_log_infix( $handle );
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}
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/**
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* Increment a log file suffix.
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*
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* @param string $handle Log handle.
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* @param null|int $number Optional. Default null. Log suffix number to be incremented.
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*
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* @return bool True if increment was successful, otherwise false.
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*/
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protected function increment_log_infix( $handle, $number = null ) {
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if ( null === $number ) {
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$suffix = '';
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$next_suffix = '.0';
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} else {
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$suffix = '.' . $number;
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$next_suffix = '.' . ( $number + 1 );
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}
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$rename_from = self::get_file_path( "{$handle}{$suffix}" );
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$rename_to = self::get_file_path( "{$handle}{$next_suffix}" );
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if ( $this->is_open( $rename_from ) ) {
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$this->close( $rename_from );
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}
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if ( is_writable( $rename_from ) ) { // phpcs:ignore WordPress.VIP.FileSystemWritesDisallow.file_ops_is_writable
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return rename( $rename_from, $rename_to ); // phpcs:ignore WordPress.VIP.FileSystemWritesDisallow.file_ops_rename
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} else {
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return false;
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}
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}
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/**
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* Open a log file for writing.
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*
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* @param string $handle Log handle.
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*
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* @return bool
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*/
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public function open( $handle = 'log' ) {
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if ( $this->is_open( $handle ) ) {
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return true;
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}
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$file = self::get_file_path( $handle );
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if ( $file ) {
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if ( ! file_exists( $file ) ) {
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$temphandle = @fopen( $file, 'w+' ); // @codingStandardsIgnoreLine.
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if ( is_resource( $temphandle ) ) {
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@fclose( $temphandle ); // @codingStandardsIgnoreLine.
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if ( defined( 'FS_CHMOD_FILE' ) ) {
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@chmod( $file, FS_CHMOD_FILE ); // @codingStandardsIgnoreLine.
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}
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}
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}
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$resource = @fopen( $file, 'a' ); // @codingStandardsIgnoreLine.
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if ( $resource ) {
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$this->handles[ $handle ] = $resource;
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return true;
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}
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}
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return false;
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}
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/**
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* Close a log file.
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*
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* @param string $handle Log handle.
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*
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* @return void
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*/
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public function close( $handle = 'log' ) {
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if ( $this->is_open( $handle ) ) {
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@fclose( $this->handles[ $handle ] ); // @codingStandardsIgnoreLine.
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unset( $this->handles[ $handle ] );
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}
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}
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/**
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* Check if a handle is open.
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*
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* @param string $handle Log handle.
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*
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* @return bool True if $handle is open.
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*/
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protected function is_open( $handle ) {
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return array_key_exists( $handle, $this->handles ) && is_resource( $this->handles[ $handle ] );
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}
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/**
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* Get the file path for a log handle.
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*
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* @param string $handle Log handle.
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*
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* @return string
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*/
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public static function get_file_path( $handle ) {
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$date_suffix = date( 'Y-m-d', time() );// phpcs:ignore WordPress.DateTime.RestrictedFunctions.date_date
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$hash_suffix = wp_hash( $handle );
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$filename = sanitize_file_name( implode( '-', array( $handle, $date_suffix, $hash_suffix ) ) . '.log' );
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return self::get_log_dir() . $filename;
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}
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/**
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* Get the log directory path while also making sure it exists & we have an index.html and a .htaccess file in it.
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*
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* @return string
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*/
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public static function get_log_dir() {
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$uploads = wp_upload_dir();
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$base_path = trailingslashit( $uploads['basedir'] ) . 'wpcode-logs/';
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if ( ! file_exists( $base_path ) ) {
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wp_mkdir_p( $base_path );
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WPCode_File_Cache::create_index_html_file( $base_path );
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WPCode_File_Cache::create_htaccess_file( $base_path );
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}
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return $base_path;
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}
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/**
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* Store a log entry in the cache for writing later.
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*
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* @param string $entry Log entry.
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* @param string $handle Log handle.
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*
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* @return void
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*/
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public function cache_log( $entry, $handle ) {
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$this->cached_logs[] = array(
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'entry' => $entry,
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'handle' => $handle,
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);
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}
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/**
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* Is logging errors enabled?
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*
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* @return bool
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*/
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public function is_enabled() {
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if ( ! isset( $this->enabled ) ) {
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$this->enabled = boolval( wpcode()->settings->get_option( 'error_logging', false ) );
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}
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return $this->enabled;
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}
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/**
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* Go through the logs folder and return a list of all .log files.
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*
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* @return array
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*/
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public function get_logs() {
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$logs = array();
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$files = glob( self::get_log_dir() . '*.log' );
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if ( ! empty( $files ) ) {
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foreach ( $files as $file ) {
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$logs[] = array(
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'filename' => basename( $file ),
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'path' => $file,
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'size' => filesize( $file ),
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);
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}
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}
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return $logs;
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}
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/**
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* Delete a log file by its name.
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*
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* @param string $name Log name.
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*
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* @return void
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*/
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public function delete_log( $name ) {
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// If the file doesn't include the .log extension, add it.
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if ( ! preg_match( '/\.log$/', $name ) ) {
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$name .= '.log';
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}
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$real_file_path = realpath( self::get_log_dir() . $name );
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$real_base_path = realpath( self::get_log_dir() ) . DIRECTORY_SEPARATOR;
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if ( false === $real_file_path || strpos( $real_file_path, $real_base_path ) !== 0 ) {
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// Traversal attempt.
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return;
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}
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// Delete the file from the server.
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@unlink( $real_file_path ); // @codingStandardsIgnoreLine.
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}
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}
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