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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\Logger;
/**
* Stores to any socket - uses fsockopen() or pfsockopen().
*
* @author Pablo de Leon Belloc <pablolb@gmail.com>
* @see http://php.net/manual/en/function.fsockopen.php
*
* @phpstan-import-type Record from \Monolog\Logger
* @phpstan-import-type FormattedRecord from AbstractProcessingHandler
*/
class SocketHandler extends AbstractProcessingHandler
{
/** @var string */
private $connectionString;
/** @var float */
private $connectionTimeout;
/** @var resource|null */
private $resource;
/** @var float */
private $timeout = 0.0;
/** @var float */
private $writingTimeout = 10.0;
/** @var ?int */
private $lastSentBytes = null;
/** @var ?int */
private $chunkSize = null;
/** @var bool */
private $persistent = false;
/** @var ?int */
private $errno = null;
/** @var ?string */
private $errstr = null;
/** @var ?float */
private $lastWritingAt = null;
/**
* @param string $connectionString Socket connection string
*/
public function __construct(string $connectionString, $level = Logger::DEBUG, bool $bubble = true)
{
parent::__construct($level, $bubble);
$this->connectionString = $connectionString;
$this->connectionTimeout = (float) ini_get('default_socket_timeout');
}
/**
* Connect (if necessary) and write to the socket
*
* {@inheritDoc}
*
* @throws \UnexpectedValueException
* @throws \RuntimeException
*/
protected function write(array $record): void
{
$this->connectIfNotConnected();
$data = $this->generateDataStream($record);
$this->writeToSocket($data);
}
/**
* We will not close a PersistentSocket instance so it can be reused in other requests.
*/
public function close(): void
{
if (!$this->isPersistent()) {
$this->closeSocket();
}
}
/**
* Close socket, if open
*/
public function closeSocket(): void
{
if (is_resource($this->resource)) {
fclose($this->resource);
$this->resource = null;
}
}
/**
* Set socket connection to be persistent. It only has effect before the connection is initiated.
*/
public function setPersistent(bool $persistent): self
{
$this->persistent = $persistent;
return $this;
}
/**
* Set connection timeout. Only has effect before we connect.
*
* @see http://php.net/manual/en/function.fsockopen.php
*/
public function setConnectionTimeout(float $seconds): self
{
$this->validateTimeout($seconds);
$this->connectionTimeout = $seconds;
return $this;
}
/**
* Set write timeout. Only has effect before we connect.
*
* @see http://php.net/manual/en/function.stream-set-timeout.php
*/
public function setTimeout(float $seconds): self
{
$this->validateTimeout($seconds);
$this->timeout = $seconds;
return $this;
}
/**
* Set writing timeout. Only has effect during connection in the writing cycle.
*
* @param float $seconds 0 for no timeout
*/
public function setWritingTimeout(float $seconds): self
{
$this->validateTimeout($seconds);
$this->writingTimeout = $seconds;
return $this;
}
/**
* Set chunk size. Only has effect during connection in the writing cycle.
*/
public function setChunkSize(int $bytes): self
{
$this->chunkSize = $bytes;
return $this;
}
/**
* Get current connection string
*/
public function getConnectionString(): string
{
return $this->connectionString;
}
/**
* Get persistent setting
*/
public function isPersistent(): bool
{
return $this->persistent;
}
/**
* Get current connection timeout setting
*/
public function getConnectionTimeout(): float
{
return $this->connectionTimeout;
}
/**
* Get current in-transfer timeout
*/
public function getTimeout(): float
{
return $this->timeout;
}
/**
* Get current local writing timeout
*
* @return float
*/
public function getWritingTimeout(): float
{
return $this->writingTimeout;
}
/**
* Get current chunk size
*/
public function getChunkSize(): ?int
{
return $this->chunkSize;
}
/**
* Check to see if the socket is currently available.
*
* UDP might appear to be connected but might fail when writing. See http://php.net/fsockopen for details.
*/
public function isConnected(): bool
{
return is_resource($this->resource)
&& !feof($this->resource); // on TCP - other party can close connection.
}
/**
* Wrapper to allow mocking
*
* @return resource|false
*/
protected function pfsockopen()
{
return @pfsockopen($this->connectionString, -1, $this->errno, $this->errstr, $this->connectionTimeout);
}
/**
* Wrapper to allow mocking
*
* @return resource|false
*/
protected function fsockopen()
{
return @fsockopen($this->connectionString, -1, $this->errno, $this->errstr, $this->connectionTimeout);
}
/**
* Wrapper to allow mocking
*
* @see http://php.net/manual/en/function.stream-set-timeout.php
*
* @return bool
*/
protected function streamSetTimeout()
{
$seconds = floor($this->timeout);
$microseconds = round(($this->timeout - $seconds) * 1e6);
if (!is_resource($this->resource)) {
throw new \LogicException('streamSetTimeout called but $this->resource is not a resource');
}
return stream_set_timeout($this->resource, (int) $seconds, (int) $microseconds);
}
/**
* Wrapper to allow mocking
*
* @see http://php.net/manual/en/function.stream-set-chunk-size.php
*
* @return int|bool
*/
protected function streamSetChunkSize()
{
if (!is_resource($this->resource)) {
throw new \LogicException('streamSetChunkSize called but $this->resource is not a resource');
}
if (null === $this->chunkSize) {
throw new \LogicException('streamSetChunkSize called but $this->chunkSize is not set');
}
return stream_set_chunk_size($this->resource, $this->chunkSize);
}
/**
* Wrapper to allow mocking
*
* @return int|bool
*/
protected function fwrite(string $data)
{
if (!is_resource($this->resource)) {
throw new \LogicException('fwrite called but $this->resource is not a resource');
}
return @fwrite($this->resource, $data);
}
/**
* Wrapper to allow mocking
*
* @return mixed[]|bool
*/
protected function streamGetMetadata()
{
if (!is_resource($this->resource)) {
throw new \LogicException('streamGetMetadata called but $this->resource is not a resource');
}
return stream_get_meta_data($this->resource);
}
private function validateTimeout(float $value): void
{
if ($value < 0) {
throw new \InvalidArgumentException("Timeout must be 0 or a positive float (got $value)");
}
}
private function connectIfNotConnected(): void
{
if ($this->isConnected()) {
return;
}
$this->connect();
}
/**
* @phpstan-param FormattedRecord $record
*/
protected function generateDataStream(array $record): string
{
return (string) $record['formatted'];
}
/**
* @return resource|null
*/
protected function getResource()
{
return $this->resource;
}
private function connect(): void
{
$this->createSocketResource();
$this->setSocketTimeout();
$this->setStreamChunkSize();
}
private function createSocketResource(): void
{
if ($this->isPersistent()) {
$resource = $this->pfsockopen();
} else {
$resource = $this->fsockopen();
}
if (is_bool($resource)) {
throw new \UnexpectedValueException("Failed connecting to $this->connectionString ($this->errno: $this->errstr)");
}
$this->resource = $resource;
}
private function setSocketTimeout(): void
{
if (!$this->streamSetTimeout()) {
throw new \UnexpectedValueException("Failed setting timeout with stream_set_timeout()");
}
}
private function setStreamChunkSize(): void
{
if ($this->chunkSize && !$this->streamSetChunkSize()) {
throw new \UnexpectedValueException("Failed setting chunk size with stream_set_chunk_size()");
}
}
private function writeToSocket(string $data): void
{
$length = strlen($data);
$sent = 0;
$this->lastSentBytes = $sent;
while ($this->isConnected() && $sent < $length) {
if (0 == $sent) {
$chunk = $this->fwrite($data);
} else {
$chunk = $this->fwrite(substr($data, $sent));
}
if ($chunk === false) {
throw new \RuntimeException("Could not write to socket");
}
$sent += $chunk;
$socketInfo = $this->streamGetMetadata();
if (is_array($socketInfo) && $socketInfo['timed_out']) {
throw new \RuntimeException("Write timed-out");
}
if ($this->writingIsTimedOut($sent)) {
throw new \RuntimeException("Write timed-out, no data sent for `{$this->writingTimeout}` seconds, probably we got disconnected (sent $sent of $length)");
}
}
if (!$this->isConnected() && $sent < $length) {
throw new \RuntimeException("End-of-file reached, probably we got disconnected (sent $sent of $length)");
}
}
private function writingIsTimedOut(int $sent): bool
{
// convert to ms
if (0.0 == $this->writingTimeout) {
return false;
}
if ($sent !== $this->lastSentBytes) {
$this->lastWritingAt = microtime(true);
$this->lastSentBytes = $sent;
return false;
} else {
usleep(100);
}
if ((microtime(true) - $this->lastWritingAt) >= $this->writingTimeout) {
$this->closeSocket();
return true;
}
return false;
}
}