Symfony Profiler

<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\HttpKernel\Profiler;
use Psr\Log\LoggerInterface;
use Symfony\Component\HttpFoundation\Exception\ConflictingHeadersException;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\DataCollector\DataCollectorInterface;
use Symfony\Component\HttpKernel\DataCollector\LateDataCollectorInterface;
use Symfony\Contracts\Service\ResetInterface;
/**
* Profiler.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class Profiler implements ResetInterface
{
private $storage;
/**
* @var DataCollectorInterface[]
*/
private $collectors = [];
private $logger;
private $initiallyEnabled = true;
private $enabled = true;
public function __construct(ProfilerStorageInterface $storage, LoggerInterface $logger = null, bool $enable = true)
{
$this->storage = $storage;
$this->logger = $logger;
$this->initiallyEnabled = $this->enabled = $enable;
}
/**
* Disables the profiler.
*/
public function disable()
{
$this->enabled = false;
}
/**
* Enables the profiler.
*/
public function enable()
{
$this->enabled = true;
}
/**
* Loads the Profile for the given Response.
*
* @return Profile|null
*/
public function loadProfileFromResponse(Response $response)
{
if (!$token = $response->headers->get('X-Debug-Token')) {
return null;
}
return $this->loadProfile($token);
}
/**
* Loads the Profile for the given token.
*
* @return Profile|null
*/
public function loadProfile(string $token)
{
return $this->storage->read($token);
}
/**
* Saves a Profile.
*
* @return bool
*/
public function saveProfile(Profile $profile)
{
// late collect
foreach ($profile->getCollectors() as $collector) {
if ($collector instanceof LateDataCollectorInterface) {
$collector->lateCollect();
}
}
if (!($ret = $this->storage->write($profile)) && null !== $this->logger) {
$this->logger->warning('Unable to store the profiler information.', ['configured_storage' => \get_class($this->storage)]);
}
return $ret;
}
/**
* Purges all data from the storage.
*/
public function purge()
{
$this->storage->purge();
}
/**
* Finds profiler tokens for the given criteria.
*
* @param string|null $limit The maximum number of tokens to return
* @param string|null $start The start date to search from
* @param string|null $end The end date to search to
*
* @return array
*
* @see https://php.net/datetime.formats for the supported date/time formats
*/
public function find(?string $ip, ?string $url, ?string $limit, ?string $method, ?string $start, ?string $end, string $statusCode = null)
{
return $this->storage->find($ip, $url, $limit, $method, $this->getTimestamp($start), $this->getTimestamp($end), $statusCode);
}
/**
* Collects data for the given Response.
*
* @return Profile|null
*/
public function collect(Request $request, Response $response, \Throwable $exception = null)
{
if (false === $this->enabled) {
return null;
}
$profile = new Profile(substr(hash('sha256', uniqid(mt_rand(), true)), 0, 6));
$profile->setTime(time());
$profile->setUrl($request->getUri());
$profile->setMethod($request->getMethod());
$profile->setStatusCode($response->getStatusCode());
try {
$profile->setIp($request->getClientIp());
} catch (ConflictingHeadersException $e) {
$profile->setIp('Unknown');
}
if ($prevToken = $response->headers->get('X-Debug-Token')) {
$response->headers->set('X-Previous-Debug-Token', $prevToken);
}
$response->headers->set('X-Debug-Token', $profile->getToken());
foreach ($this->collectors as $collector) {
$collector->collect($request, $response, $exception);
// we need to clone for sub-requests
$profile->addCollector(clone $collector);
}
return $profile;
}
public function reset()
{
foreach ($this->collectors as $collector) {
$collector->reset();
}
$this->enabled = $this->initiallyEnabled;
}
/**
* Gets the Collectors associated with this profiler.
*
* @return array
*/
public function all()
{
return $this->collectors;
}
/**
* Sets the Collectors associated with this profiler.
*
* @param DataCollectorInterface[] $collectors An array of collectors
*/
public function set(array $collectors = [])
{
$this->collectors = [];
foreach ($collectors as $collector) {
$this->add($collector);
}
}
/**
* Adds a Collector.
*/
public function add(DataCollectorInterface $collector)
{
$this->collectors[$collector->getName()] = $collector;
}
/**
* Returns true if a Collector for the given name exists.
*
* @param string $name A collector name
*
* @return bool
*/
public function has(string $name)
{
return isset($this->collectors[$name]);
}
/**
* Gets a Collector by name.
*
* @param string $name A collector name
*
* @return DataCollectorInterface
*
* @throws \InvalidArgumentException if the collector does not exist
*/
public function get(string $name)
{
if (!isset($this->collectors[$name])) {
throw new \InvalidArgumentException(sprintf('Collector "%s" does not exist.', $name));
}
return $this->collectors[$name];
}
private function getTimestamp(?string $value): ?int
{
if (null === $value || '' === $value) {
return null;
}
try {
$value = new \DateTime(is_numeric($value) ? '@'.$value : $value);
} catch (\Exception $e) {
return null;
}
return $value->getTimestamp();
}
}

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