Viewing file:  ChromePHPHandler.php (5.02 KB) -rw-r--r--
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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\Handler;
use Monolog\Formatter\ChromePHPFormatter;
use Monolog\Formatter\FormatterInterface;
use Monolog\Level;
use Monolog\Utils;
use Monolog\LogRecord;
use Monolog\DateTimeImmutable;
/**
* Handler sending logs to the ChromePHP extension (http://www.chromephp.com/)
*
* This also works out of the box with Firefox 43+
*
* @author Christophe Coevoet <stof@notk.org>
*/
class ChromePHPHandler extends AbstractProcessingHandler
{
use WebRequestRecognizerTrait;
/**
* Version of the extension
*/
protected const VERSION = '4.0';
/**
* Header name
*/
protected const HEADER_NAME = 'X-ChromeLogger-Data';
/**
* Regular expression to detect supported browsers (matches any Chrome, or Firefox 43+)
*/
protected const USER_AGENT_REGEX = '{\b(?:Chrome/\d+(?:\.\d+)*|HeadlessChrome|Firefox/(?:4[3-9]|[5-9]\d|\d{3,})(?:\.\d)*)\b}';
protected static bool $initialized = false;
/**
* Tracks whether we sent too much data
*
* Chrome limits the headers to 4KB, so when we sent 3KB we stop sending
*/
protected static bool $overflowed = false;
/** @var mixed[] */
protected static array $json = [
'version' => self::VERSION,
'columns' => ['label', 'log', 'backtrace', 'type'],
'rows' => [],
];
protected static bool $sendHeaders = true;
/**
* @throws \RuntimeException If the function json_encode does not exist
*/
public function __construct(int|string|Level $level = Level::Debug, bool $bubble = true)
{
parent::__construct($level, $bubble);
if (!function_exists('json_encode')) {
throw new \RuntimeException('PHP\'s json extension is required to use Monolog\'s ChromePHPHandler');
}
}
/**
* @inheritDoc
*/
public function handleBatch(array $records): void
{
if (!$this->isWebRequest()) {
return;
}
$messages = [];
foreach ($records as $record) {
if ($record->level < $this->level) {
continue;
}
$message = $this->processRecord($record);
$messages[] = $message;
}
if (\count($messages) > 0) {
$messages = $this->getFormatter()->formatBatch($messages);
self::$json['rows'] = array_merge(self::$json['rows'], $messages);
$this->send();
}
}
/**
* @inheritDoc
*/
protected function getDefaultFormatter(): FormatterInterface
{
return new ChromePHPFormatter();
}
/**
* Creates & sends header for a record
*
* @see sendHeader()
* @see send()
*/
protected function write(LogRecord $record): void
{
if (!$this->isWebRequest()) {
return;
}
self::$json['rows'][] = $record->formatted;
$this->send();
}
/**
* Sends the log header
*
* @see sendHeader()
*/
protected function send(): void
{
if (self::$overflowed || !self::$sendHeaders) {
return;
}
if (!self::$initialized) {
self::$initialized = true;
self::$sendHeaders = $this->headersAccepted();
if (!self::$sendHeaders) {
return;
}
self::$json['request_uri'] = $_SERVER['REQUEST_URI'] ?? '';
}
$json = Utils::jsonEncode(self::$json, Utils::DEFAULT_JSON_FLAGS & ~JSON_UNESCAPED_UNICODE, true);
$data = base64_encode($json);
if (strlen($data) > 3 * 1024) {
self::$overflowed = true;
$record = new LogRecord(
message: 'Incomplete logs, chrome header size limit reached',
level: Level::Warning,
channel: 'monolog',
datetime: new DateTimeImmutable(true),
);
self::$json['rows'][count(self::$json['rows']) - 1] = $this->getFormatter()->format($record);
$json = Utils::jsonEncode(self::$json, Utils::DEFAULT_JSON_FLAGS & ~JSON_UNESCAPED_UNICODE, true);
$data = base64_encode($json);
}
if (trim($data) !== '') {
$this->sendHeader(static::HEADER_NAME, $data);
}
}
/**
* Send header string to the client
*/
protected function sendHeader(string $header, string $content): void
{
if (!headers_sent() && self::$sendHeaders) {
header(sprintf('%s: %s', $header, $content));
}
}
/**
* Verifies if the headers are accepted by the current user agent
*/
protected function headersAccepted(): bool
{
if (!isset($_SERVER['HTTP_USER_AGENT'])) {
return false;
}
return preg_match(static::USER_AGENT_REGEX, $_SERVER['HTTP_USER_AGENT']) === 1;
}
}
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