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<?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;
/**
* Storage for profiler using files.
*
* @author Alexandre Salomé <alexandre.salome@gmail.com>
*/
class FileProfilerStorage implements ProfilerStorageInterface
{
/**
* Folder where profiler data are stored.
*/
private string $folder;
/**
* Constructs the file storage using a "dsn-like" path.
*
* Example : "file:/path/to/the/storage/folder"
*
* @throws \RuntimeException
*/
public function __construct(string $dsn)
{
if (!str_starts_with($dsn, 'file:')) {
throw new \RuntimeException(\sprintf('Please check your configuration. You are trying to use FileStorage with an invalid dsn "%s". The expected format is "file:/path/to/the/storage/folder".', $dsn));
}
$this->folder = substr($dsn, 5);
if (!is_dir($this->folder) && false === @mkdir($this->folder, 0o777, true) && !is_dir($this->folder)) {
throw new \RuntimeException(\sprintf('Unable to create the storage directory (%s).', $this->folder));
}
}
public function find(?string $ip, ?string $url, ?int $limit, ?string $method, ?int $start = null, ?int $end = null, ?string $statusCode = null, ?\Closure $filter = null): array
{
$file = $this->getIndexFilename();
if (!file_exists($file)) {
return [];
}
$file = fopen($file, 'r');
fseek($file, 0, \SEEK_END);
$result = [];
while (\count($result) < $limit && $line = $this->readLineFromFile($file)) {
$values = str_getcsv($line, ',', '"', '\\');
if (7 > \count($values)) {
// skip invalid lines
continue;
}
[$csvToken, $csvIp, $csvMethod, $csvUrl, $csvTime, $csvParent, $csvStatusCode, $csvVirtualType] = $values + [7 => null];
$csvTime = (int) $csvTime;
$urlFilter = false;
if ($url) {
$urlFilter = str_starts_with($url, '!') ? str_contains($csvUrl, substr($url, 1)) : !str_contains($csvUrl, $url);
}
if ($ip && !str_contains($csvIp, $ip) || $urlFilter || $method && !str_contains($csvMethod, $method) || $statusCode && !str_contains($csvStatusCode, $statusCode)) {
continue;
}
if ($start && $csvTime < $start) {
continue;
}
if ($end && $csvTime > $end) {
continue;
}
$profile = [
'token' => $csvToken,
'ip' => $csvIp,
'method' => $csvMethod,
'url' => $csvUrl,
'time' => $csvTime,
'parent' => $csvParent,
'status_code' => $csvStatusCode,
'virtual_type' => $csvVirtualType ?: 'request',
];
if ($filter && !$filter($profile)) {
continue;
}
$result[$csvToken] = $profile;
}
fclose($file);
return array_values($result);
}
public function purge(): void
{
$flags = \FilesystemIterator::SKIP_DOTS;
$iterator = new \RecursiveDirectoryIterator($this->folder, $flags);
$iterator = new \RecursiveIteratorIterator($iterator, \RecursiveIteratorIterator::CHILD_FIRST);
foreach ($iterator as $file) {
if (is_file($file)) {
unlink($file);
} else {
rmdir($file);
}
}
}
public function read(string $token): ?Profile
{
return $this->doRead($token);
}
/**
* @throws \RuntimeException
*/
public function write(Profile $profile): bool
{
$file = $this->getFilename($profile->getToken());
$profileIndexed = is_file($file);
if (!$profileIndexed) {
// Create directory
$dir = \dirname($file);
if (!is_dir($dir) && false === @mkdir($dir, 0o777, true) && !is_dir($dir)) {
throw new \RuntimeException(\sprintf('Unable to create the storage directory (%s).', $dir));
}
}
$profileToken = $profile->getToken();
// when there are errors in sub-requests, the parent and/or children tokens
// may equal the profile token, resulting in infinite loops
$parentToken = $profile->getParentToken() !== $profileToken ? $profile->getParentToken() : null;
$childrenToken = array_filter(array_map(static fn (Profile $p) => $profileToken !== $p->getToken() ? $p->getToken() : null, $profile->getChildren()));
// Store profile
$data = [
'token' => $profileToken,
'parent' => $parentToken,
'children' => $childrenToken,
'data' => $profile->getCollectors(),
'ip' => $profile->getIp(),
'method' => $profile->getMethod(),
'url' => $profile->getUrl(),
'time' => $profile->getTime(),
'status_code' => $profile->getStatusCode(),
'virtual_type' => $profile->getVirtualType() ?? 'request',
];
$data = serialize($data);
if (\function_exists('gzencode')) {
$data = gzencode($data, 3);
}
if (false === file_put_contents($file, $data, \LOCK_EX)) {
return false;
}
if (!$profileIndexed) {
// Add to index
if (false === $file = fopen($this->getIndexFilename(), 'a')) {
return false;
}
fputcsv($file, [
$profile->getToken(),
$profile->getIp(),
$profile->getMethod(),
$profile->getUrl(),
$profile->getTime() ?: time(),
$profile->getParentToken(),
$profile->getStatusCode(),
$profile->getVirtualType() ?? 'request',
], ',', '"', '\\');
fclose($file);
if (1 === random_int(1, 10)) {
$this->removeExpiredProfiles();
}
}
return true;
}
/**
* Gets filename to store data, associated to the token.
*/
protected function getFilename(string $token): string
{
// Uses 4 last characters, because first are mostly the same.
$folderA = substr($token, -2, 2);
$folderB = substr($token, -4, 2);
return $this->folder.'/'.$folderA.'/'.$folderB.'/'.$token;
}
/**
* Gets the index filename.
*/
protected function getIndexFilename(): string
{
return $this->folder.'/index.csv';
}
/**
* Reads a line in the file, backward.
*
* This function automatically skips the empty lines and do not include the line return in result value.
*
* @param resource $file The file resource, with the pointer placed at the end of the line to read
*/
protected function readLineFromFile($file): mixed
{
$line = '';
$position = ftell($file);
if (0 === $position) {
return null;
}
while (true) {
$chunkSize = min($position, 1024);
$position -= $chunkSize;
fseek($file, $position);
if (0 === $chunkSize) {
// bof reached
break;
}
$buffer = fread($file, $chunkSize);
if (false === ($upTo = strrpos($buffer, "\n"))) {
$line = $buffer.$line;
continue;
}
$position += $upTo;
$line = substr($buffer, $upTo + 1).$line;
fseek($file, max(0, $position), \SEEK_SET);
if ('' !== $line) {
break;
}
}
return '' === $line ? null : $line;
}
protected function createProfileFromData(string $token, array $data, ?Profile $parent = null): Profile
{
$profile = new Profile($token);
$profile->setIp($data['ip']);
$profile->setMethod($data['method']);
$profile->setUrl($data['url']);
$profile->setTime($data['time']);
$profile->setStatusCode($data['status_code']);
$profile->setVirtualType($data['virtual_type'] ?: 'request');
$profile->setCollectors($data['data']);
if (!$parent && $data['parent']) {
$parent = $this->read($data['parent']);
}
if ($parent) {
$profile->setParent($parent);
}
foreach ($data['children'] as $token) {
if (null !== $childProfile = $this->doRead($token, $profile)) {
$profile->addChild($childProfile);
}
}
return $profile;
}
private function doRead($token, ?Profile $profile = null): ?Profile
{
if (!$token || !file_exists($file = $this->getFilename($token))) {
return null;
}
$h = fopen($file, 'r');
flock($h, \LOCK_SH);
$data = stream_get_contents($h);
flock($h, \LOCK_UN);
fclose($h);
if (\function_exists('gzdecode')) {
$data = @gzdecode($data) ?: $data;
}
if (!$data = unserialize($data, ['allowed_classes' => true])) {
return null;
}
return $this->createProfileFromData($token, $data, $profile);
}
private function removeExpiredProfiles(): void
{
$minimalProfileTimestamp = time() - 2 * 86400;
$file = $this->getIndexFilename();
$handle = fopen($file, 'r');
if ($offset = is_file($file.'.offset') ? (int) file_get_contents($file.'.offset') : 0) {
fseek($handle, $offset);
}
while ($line = fgets($handle)) {
$values = str_getcsv($line, ',', '"', '\\');
if (7 > \count($values)) {
// skip invalid lines
$offset += \strlen($line);
continue;
}
[$csvToken, , , , $csvTime] = $values;
if ($csvTime >= $minimalProfileTimestamp) {
break;
}
@unlink($this->getFilename($csvToken));
$offset += \strlen($line);
}
fclose($handle);
file_put_contents($file.'.offset', $offset);
}
}