<?php
/*
* This file is part of the Monolog package.
*
* (c) Jordi Boggiano <[email protected]>
*
* 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 <[email protected]>
* @see http://php.net/manual/en/function.fsockopen.php
*/
class SocketHandler extends AbstractProcessingHandler
{
private $connectionString;
private $connectionTimeout;
private $resource;
private $timeout = 0;
private $writingTimeout = 10;
private $lastSentBytes = null;
private $persistent = false;
private $errno;
private $errstr;
private $lastWritingAt;
/**
* @param string $connectionString Socket connection string
* @param int $level The minimum logging level at which this handler will be triggered
* @param Boolean $bubble Whether the messages that are handled can bubble up the stack or not
*/
public function __construct($connectionString, $level = Logger::DEBUG, $bubble = true)
{
parent::__construct($level, $bubble);
$this->connectionString = $connectionString;
$this->connectionTimeout = (float) ini_get('default_socket_timeout');
}
/**
* Connect (if necessary) and write to the socket
*
* @param array $record
*
* @throws \UnexpectedValueException
* @throws \RuntimeException
*/
protected function write(array $record)
{
$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()
{
if (!$this->isPersistent()) {
$this->closeSocket();
}
}
/**
* Close socket, if open
*/
public function closeSocket()
{
if (is_resource($this->resource)) {
fclose($this->resource);
$this->resource = null;
}
}
/**
* Set socket connection to nbe persistent. It only has effect before the connection is initiated.
*
* @param bool $persistent
*/
public function setPersistent($persistent)
{
$this->persistent = (boolean) $persistent;
}
/**
* Set connection timeout. Only has effect before we connect.
*
* @param float $seconds
*
* @see http://php.net/manual/en/function.fsockopen.php
*/
public function setConnectionTimeout($seconds)
{
$this->validateTimeout($seconds);
$this->connectionTimeout = (float) $seconds;
}
/**
* Set write timeout. Only has effect before we connect.
*
* @param float $seconds
*
* @see http://php.net/manual/en/function.stream-set-timeout.php
*/
public function setTimeout($seconds)
{
$this->validateTimeout($seconds);
$this->timeout = (float) $seconds;
}
/**
* Set writing timeout. Only has effect during connection in the writing cycle.
*
* @param float $seconds 0 for no timeout
*/
public function setWritingTimeout($seconds)
{
$this->validateTimeout($seconds);
$this->writingTimeout = (float) $seconds;
}
/**
* Get current connection string
*
* @return string
*/
public function getConnectionString()
{
return $this->connectionString;
}
/**
* Get persistent setting
*
* @return bool
*/
public function isPersistent()
{
return $this->persistent;
}
/**
* Get current connection timeout setting
*
* @return float
*/
public function getConnectionTimeout()
{
return $this->connectionTimeout;
}
/**
* Get current in-transfer timeout
*
* @return float
*/
public function getTimeout()
{
return $this->timeout;
}
/**
* Get current local writing timeout
*
* @return float
*/
public function getWritingTimeout()
{
return $this->writingTimeout;
}
/**
* Check to see if the socket is currently available.
*
* UDP might appear to be connected but might fail when writing. See http://php.net/fsockopen for details.
*
* @return bool
*/
public function isConnected()
{
return is_resource($this->resource)
&& !feof($this->resource); // on TCP - other party can close connection.
}
/**
* Wrapper to allow mocking
*/
protected function pfsockopen()
{
return @pfsockopen($this->connectionString, -1, $this->errno, $this->errstr, $this->connectionTimeout);
}
/**
* Wrapper to allow mocking
*/
protected function fsockopen()
{
return @fsockopen($this->connectionString, -1, $this->errno, $this->errstr, $this->connectionTimeout);
}
/**
* Wrapper to allow mocking
*
* @see http://php.net/manual/en/function.stream-set-timeout.php
*/
protected function streamSetTimeout()
{
$seconds = floor($this->timeout);
$microseconds = round(($this->timeout - $seconds) * 1e6);
return stream_set_timeout($this->resource, $seconds, $microseconds);
}
/**
* Wrapper to allow mocking
*/
protected function fwrite($data)
{
return @fwrite($this->resource, $data);
}
/**
* Wrapper to allow mocking
*/
protected function streamGetMetadata()
{
return stream_get_meta_data($this->resource);
}
private function validateTimeout($value)
{
$ok = filter_var($value, FILTER_VALIDATE_FLOAT);
if ($ok === false || $value < 0) {
throw new \InvalidArgumentException("Timeout must be 0 or a positive float (got $value)");
}
}
private function connectIfNotConnected()
{
if ($this->isConnected()) {
return;
}
$this->connect();
}
protected function generateDataStream($record)
{
return (string) $record['formatted'];
}
/**
* @return resource|null
*/
protected function getResource()
{
return $this->resource;
}
private function connect()
{
$this->createSocketResource();
$this->setSocketTimeout();
}
private function createSocketResource()
{
if ($this->isPersistent()) {
$resource = $this->pfsockopen();
} else {
$resource = $this->fsockopen();
}
if (!$resource) {
throw new \UnexpectedValueException("Failed connecting to $this->connectionString ($this->errno: $this->errstr)");
}
$this->resource = $resource;
}
private function setSocketTimeout()
{
if (!$this->streamSetTimeout()) {
throw new \UnexpectedValueException("Failed setting timeout with stream_set_timeout()");
}
}
private function writeToSocket($data)
{
$length = strlen($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 = $this->streamGetMetadata();
if ($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 $length)");
}
}
private function writingIsTimedOut($sent)
{
$writingTimeout = (int) floor($this->writingTimeout);
if (0 === $writingTimeout) {
return false;
}
if ($sent !== $this->lastSentBytes) {
$this->lastWritingAt = time();
$this->lastSentBytes = $sent;
return false;
} else {
usleep(100);
}
if ((time() - $this->lastWritingAt) >= $writingTimeout) {
$this->closeSocket();
return true;
}
return false;
}
}