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<?php
/*
* 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\WildfireFormatter;
/**
* Simple FirePHP Handler (http://www.firephp.org/), which uses the Wildfire protocol.
*
* @author Eric Clemmons (@ericclemmons) <eric@uxdriven.com>
*/
class FirePHPHandler extends AbstractProcessingHandler
{
/**
* WildFire JSON header message format
*/
const PROTOCOL_URI = 'http://meta.wildfirehq.org/Protocol/JsonStream/0.2';
/**
* FirePHP structure for parsing messages & their presentation
*/
const STRUCTURE_URI = 'http://meta.firephp.org/Wildfire/Structure/FirePHP/FirebugConsole/0.1';
/**
* Must reference a "known" plugin, otherwise headers won't display in FirePHP
*/
const PLUGIN_URI = 'http://meta.firephp.org/Wildfire/Plugin/FirePHP/Library-FirePHPCore/0.3';
/**
* Header prefix for Wildfire to recognize & parse headers
*/
const HEADER_PREFIX = 'X-Wf';
/**
* Whether or not Wildfire vendor-specific headers have been generated & sent yet
*/
protected static $initialized = false;
/**
* Shared static message index between potentially multiple handlers
* @var int
*/
protected static $messageIndex = 1;
protected static $sendHeaders = true;
/**
* Base header creation function used by init headers & record headers
*
* @param array $meta Wildfire Plugin, Protocol & Structure Indexes
* @param string $message Log message
* @return array Complete header string ready for the client as key and message as value
*/
protected function createHeader(array $meta, $message)
{
$header = sprintf('%s-%s', self::HEADER_PREFIX, join('-', $meta));
return array($header => $message);
}
/**
* Creates message header from record
*
* @see createHeader()
* @param array $record
* @return string
*/
protected function createRecordHeader(array $record)
{
// Wildfire is extensible to support multiple protocols & plugins in a single request,
// but we're not taking advantage of that (yet), so we're using "1" for simplicity's sake.
return $this->createHeader(
array(1, 1, 1, self::$messageIndex++),
$record['formatted']
);
}
/**
* {@inheritDoc}
*/
protected function getDefaultFormatter()
{
return new WildfireFormatter();
}
/**
* Wildfire initialization headers to enable message parsing
*
* @see createHeader()
* @see sendHeader()
* @return array
*/
protected function getInitHeaders()
{
// Initial payload consists of required headers for Wildfire
return array_merge(
$this->createHeader(array('Protocol', 1), self::PROTOCOL_URI),
$this->createHeader(array(1, 'Structure', 1), self::STRUCTURE_URI),
$this->createHeader(array(1, 'Plugin', 1), self::PLUGIN_URI)
);
}
/**
* Send header string to the client
*
* @param string $header
* @param string $content
*/
protected function sendHeader($header, $content)
{
if (!headers_sent() && self::$sendHeaders) {
header(sprintf('%s: %s', $header, $content));
}
}
/**
* Creates & sends header for a record, ensuring init headers have been sent prior
*
* @see sendHeader()
* @see sendInitHeaders()
* @param array $record
*/
protected function write(array $record)
{
if (!self::$sendHeaders) {
return;
}
// WildFire-specific headers must be sent prior to any messages
if (!self::$initialized) {
self::$initialized = true;
self::$sendHeaders = $this->headersAccepted();
if (!self::$sendHeaders) {
return;
}
foreach ($this->getInitHeaders() as $header => $content) {
$this->sendHeader($header, $content);
}
}
$header = $this->createRecordHeader($record);
if (trim(current($header)) !== '') {
$this->sendHeader(key($header), current($header));
}
}
/**
* Verifies if the headers are accepted by the current user agent
*
* @return Boolean
*/
protected function headersAccepted()
{
if (!empty($_SERVER['HTTP_USER_AGENT']) && preg_match('{\bFirePHP/\d+\.\d+\b}', $_SERVER['HTTP_USER_AGENT'])) {
return true;
}
return isset($_SERVER['HTTP_X_FIREPHP_VERSION']);
}
/**
* BC getter for the sendHeaders property that has been made static
*/
public function __get($property)
{
if ('sendHeaders' !== $property) {
throw new \InvalidArgumentException('Undefined property '.$property);
}
return static::$sendHeaders;
}
/**
* BC setter for the sendHeaders property that has been made static
*/
public function __set($property, $value)
{
if ('sendHeaders' !== $property) {
throw new \InvalidArgumentException('Undefined property '.$property);
}
static::$sendHeaders = $value;
}
}
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