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<?php declare(strict_types=1);
/*
* This file is part of the Monolog package.
*
* (c) Jordi Boggiano <j.boggiano@seld.be>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Monolog;
final class Utils
{
const DEFAULT_JSON_FLAGS = JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE | JSON_PRESERVE_ZERO_FRACTION | JSON_INVALID_UTF8_SUBSTITUTE | JSON_PARTIAL_OUTPUT_ON_ERROR;
public static function getClass(object $object): string
{
$class = \get_class($object);
return 'c' === $class[0] && 0 === strpos($class, "class@anonymous\0") ? get_parent_class($class).'@anonymous' : $class;
}
public static function substr(string $string, int $start, ?int $length = null): string
{
if (extension_loaded('mbstring')) {
return mb_strcut($string, $start, $length);
}
return substr($string, $start, (null === $length) ? strlen($string) : $length);
}
/**
* Makes sure if a relative path is passed in it is turned into an absolute path
*
* @param string $streamUrl stream URL or path without protocol
*/
public static function canonicalizePath(string $streamUrl): string
{
$prefix = '';
if ('file://' === substr($streamUrl, 0, 7)) {
$streamUrl = substr($streamUrl, 7);
$prefix = 'file://';
}
// other type of stream, not supported
if (false !== strpos($streamUrl, '://')) {
return $streamUrl;
}
// already absolute
if (substr($streamUrl, 0, 1) === '/' || substr($streamUrl, 1, 1) === ':' || substr($streamUrl, 0, 2) === '\\\\') {
return $prefix.$streamUrl;
}
$streamUrl = getcwd() . '/' . $streamUrl;
return $prefix.$streamUrl;
}
/**
* Return the JSON representation of a value
*
* @param mixed $data
* @param int $encodeFlags flags to pass to json encode, defaults to DEFAULT_JSON_FLAGS
* @param bool $ignoreErrors whether to ignore encoding errors or to throw on error, when ignored and the encoding fails, "null" is returned which is valid json for null
* @throws \RuntimeException if encoding fails and errors are not ignored
* @return string when errors are ignored and the encoding fails, "null" is returned which is valid json for null
*/
public static function jsonEncode($data, ?int $encodeFlags = null, bool $ignoreErrors = false): string
{
if (null === $encodeFlags) {
$encodeFlags = self::DEFAULT_JSON_FLAGS;
}
if ($ignoreErrors) {
$json = @json_encode($data, $encodeFlags);
if (false === $json) {
return 'null';
}
return $json;
}
$json = json_encode($data, $encodeFlags);
if (false === $json) {
$json = self::handleJsonError(json_last_error(), $data);
}
return $json;
}
/**
* Handle a json_encode failure.
*
* If the failure is due to invalid string encoding, try to clean the
* input and encode again. If the second encoding attempt fails, the
* initial error is not encoding related or the input can't be cleaned then
* raise a descriptive exception.
*
* @param int $code return code of json_last_error function
* @param mixed $data data that was meant to be encoded
* @param int $encodeFlags flags to pass to json encode, defaults to JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE | JSON_PRESERVE_ZERO_FRACTION
* @throws \RuntimeException if failure can't be corrected
* @return string JSON encoded data after error correction
*/
public static function handleJsonError(int $code, $data, ?int $encodeFlags = null): string
{
if ($code !== JSON_ERROR_UTF8) {
self::throwEncodeError($code, $data);
}
if (is_string($data)) {
self::detectAndCleanUtf8($data);
} elseif (is_array($data)) {
array_walk_recursive($data, array('Monolog\Utils', 'detectAndCleanUtf8'));
} else {
self::throwEncodeError($code, $data);
}
if (null === $encodeFlags) {
$encodeFlags = self::DEFAULT_JSON_FLAGS;
}
$json = json_encode($data, $encodeFlags);
if ($json === false) {
self::throwEncodeError(json_last_error(), $data);
}
return $json;
}
/**
* Throws an exception according to a given code with a customized message
*
* @param int $code return code of json_last_error function
* @param mixed $data data that was meant to be encoded
* @throws \RuntimeException
*/
private static function throwEncodeError(int $code, $data): void
{
switch ($code) {
case JSON_ERROR_DEPTH:
$msg = 'Maximum stack depth exceeded';
break;
case JSON_ERROR_STATE_MISMATCH:
$msg = 'Underflow or the modes mismatch';
break;
case JSON_ERROR_CTRL_CHAR:
$msg = 'Unexpected control character found';
break;
case JSON_ERROR_UTF8:
$msg = 'Malformed UTF-8 characters, possibly incorrectly encoded';
break;
default:
$msg = 'Unknown error';
}
throw new \RuntimeException('JSON encoding failed: '.$msg.'. Encoding: '.var_export($data, true));
}
/**
* Detect invalid UTF-8 string characters and convert to valid UTF-8.
*
* Valid UTF-8 input will be left unmodified, but strings containing
* invalid UTF-8 codepoints will be reencoded as UTF-8 with an assumed
* original encoding of ISO-8859-15. This conversion may result in
* incorrect output if the actual encoding was not ISO-8859-15, but it
* will be clean UTF-8 output and will not rely on expensive and fragile
* detection algorithms.
*
* Function converts the input in place in the passed variable so that it
* can be used as a callback for array_walk_recursive.
*
* @param mixed $data Input to check and convert if needed, passed by ref
*/
private static function detectAndCleanUtf8(&$data): void
{
if (is_string($data) && !preg_match('//u', $data)) {
$data = preg_replace_callback(
'/[\x80-\xFF]+/',
function ($m) {
return utf8_encode($m[0]);
},
$data
);
$data = str_replace(
['¤', '¦', '¨', '´', '¸', '¼', '½', '¾'],
['€', 'Š', 'š', 'Ž', 'ž', 'Œ', 'œ', 'Ÿ'],
$data
);
}
}
}