finishing Syslog formatter (#1689)

* feat: Syslog formatter

* feat: Syslog formatter, app name

* update syslogFormatter

* Remove legacy syntax

Co-authored-by: Dalibor Karlović <dalibor.karlovic@sigwin.hr>
Co-authored-by: Renat Gabdullin <renatobyj@gmail.com>

src/Monolog/Formatter/SyslogFormatter.php

@@ -0,0 +1,67 @@
+<?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\Formatter;
+
+use Monolog\Handler\Syslog\SyslogUtils;
+use Monolog\Level;
+use Monolog\LogRecord;
+
+/**
+ * Serializes a log message according to RFC 5424
+ *
+ * @author Dalibor Karlović <dalibor.karlovic@sigwin.hr>
+ * @author Renat Gabdullin <renatobyj@gmail.com>
+ */
+class SyslogFormatter extends LineFormatter
+{
+    private const SYSLOG_FACILITY_USER = 1;
+    private const FORMAT = "<%extra.priority%>1 %datetime% %extra.hostname% %extra.app-name% %extra.procid% %channel% %extra.structured-data% %level_name%: %message% %context% %extra%\n";
+    private const NILVALUE = '-';
+
+    private string $hostname;
+    private int $procid;
+
+    public function __construct(private string $applicationName = self::NILVALUE)
+    {
+        parent::__construct(self::FORMAT, 'Y-m-d\TH:i:s.uP', true, true);
+        $this->hostname = (string) gethostname();
+        $this->procid = (int) getmypid();
+    }
+
+    public function format(LogRecord $record): string
+    {
+        $record->extra = $this->formatExtra($record);
+
+        return parent::format($record);
+    }
+
+    /**
+     * @param LogRecord $record
+     * @return array<string, mixed>
+     */
+    private function formatExtra(LogRecord $record): array
+    {
+        $extra = $record->extra;
+        $extra['app-name'] = $this->applicationName;
+        $extra['hostname'] = $this->hostname;
+        $extra['procid'] = $this->procid;
+        $extra['priority'] = self::calculatePriority($record->level);
+        $extra['structured-data'] = self::NILVALUE;
+        
+        return $extra;
+    }
+
+    private static function calculatePriority(Level $level): int
+    {
+        return (self::SYSLOG_FACILITY_USER * 8) + SyslogUtils::toSyslogPriority($level);
+    }
+}

src/Monolog/Handler/AbstractSyslogHandler.php

@@ -22,23 +22,6 @@ abstract class AbstractSyslogHandler extends AbstractProcessingHandler
 {
     protected int $facility;
 
-    /**
-     * Translates Monolog log levels to syslog log priorities.
-     */
-    protected function toSyslogPriority(Level $level): int
-    {
-        return match ($level) {
-            Level::Debug     => \LOG_DEBUG,
-            Level::Info      => \LOG_INFO,
-            Level::Notice    => \LOG_NOTICE,
-            Level::Warning   => \LOG_WARNING,
-            Level::Error     => \LOG_ERR,
-            Level::Critical  => \LOG_CRIT,
-            Level::Alert     => \LOG_ALERT,
-            Level::Emergency => \LOG_EMERG,
-        };
-    }
-
     /**
      * List of valid log facility names.
      * @var array<string, int>

src/Monolog/Handler/SyslogUdp/UdpSocket.php → src/Monolog/Handler/Syslog/SyslogUdp/UdpSocket.php

@@ -9,7 +9,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Monolog\Handler\SyslogUdp;
+namespace Monolog\Handler\Syslog\SyslogUdp;
 
 use Monolog\Utils;
 use Socket;

src/Monolog/Handler/Syslog/SyslogUtils.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Monolog\Handler\Syslog;
+
+use Monolog\Level;
+
+class SyslogUtils
+{
+    public static function toSyslogPriority(Level $level): int
+    {
+        return match ($level) {
+            Level::Debug     => \LOG_DEBUG,
+            Level::Info      => \LOG_INFO,
+            Level::Notice    => \LOG_NOTICE,
+            Level::Warning   => \LOG_WARNING,
+            Level::Error     => \LOG_ERR,
+            Level::Critical  => \LOG_CRIT,
+            Level::Alert     => \LOG_ALERT,
+            Level::Emergency => \LOG_EMERG,
+        };
+    }
+}

src/Monolog/Handler/SyslogHandler.php

@@ -11,6 +11,7 @@
 
 namespace Monolog\Handler;
 
+use Monolog\Handler\Syslog\SyslogUtils;
 use Monolog\Level;
 use Monolog\Utils;
 use Monolog\LogRecord;
@@ -61,6 +62,6 @@ class SyslogHandler extends AbstractSyslogHandler
         if (!openlog($this->ident, $this->logopts, $this->facility)) {
             throw new \LogicException('Can\'t open syslog for ident "'.$this->ident.'" and facility "'.$this->facility.'"' . Utils::getRecordMessageForException($record));
         }
-        syslog($this->toSyslogPriority($record->level), (string) $record->formatted);
+        syslog(SyslogUtils::toSyslogPriority($record->level), (string) $record->formatted);
     }
 }

src/Monolog/Handler/SyslogUdpHandler.php

@@ -13,7 +13,8 @@ namespace Monolog\Handler;
 
 use DateTimeInterface;
 use Monolog\Level;
-use Monolog\Handler\SyslogUdp\UdpSocket;
+use Monolog\Handler\Syslog\SyslogUdp\UdpSocket;
+use Monolog\Handler\Syslog\SyslogUtils;
 use Monolog\Utils;
 use Monolog\LogRecord;
 
@@ -70,7 +71,7 @@ class SyslogUdpHandler extends AbstractSyslogHandler
     {
         $lines = $this->splitMessageIntoLines($record->formatted);
 
-        $header = $this->makeCommonSyslogHeader($this->toSyslogPriority($record->level), $record->datetime);
+        $header = $this->makeCommonSyslogHeader(SyslogUtils::toSyslogPriority($record->level), $record->datetime);
 
         foreach ($lines as $line) {
             $this->socket->write($line, $header);

tests/Monolog/Formatter/SyslogFormatterTest.php

@@ -0,0 +1,113 @@
+<?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\Formatter;
+
+use DateTimeImmutable;
+use Monolog\Level;
+use Monolog\LogRecord;
+use PHPUnit\Framework\TestCase;
+
+class SyslogFormatterTest extends TestCase
+{
+    /**
+     * @dataProvider formatDataProvider
+     *
+     * @param string $expected
+     * @param DateTimeImmutable $dateTime
+     * @param string $channel
+     * @param Level $level
+     * @param string $message
+     * @param string|null $appName
+     * @param mixed[] $context
+     * @param mixed[] $extra
+     * @return void
+     */
+    public function testFormat(
+        string $expected,
+        DateTimeImmutable $dateTime,
+        string $channel,
+        Level $level,
+        string $message,
+        string $appName = null,
+        array $context = [],
+        array $extra = []
+    ): void {
+        if ($appName !== null) {
+            $formatter = new SyslogFormatter($appName);
+        } else {
+            $formatter = new SyslogFormatter();
+        }
+
+        $record = new LogRecord(
+            datetime: $dateTime,
+            channel: $channel,
+            level: $level,
+            message: $message,
+            context: $context,
+            extra: $extra
+        );
+
+        $message = $formatter->format($record);
+
+        $this->assertEquals($expected, $message);
+    }
+
+    /**
+     * @return mixed[]
+     */
+    public function formatDataProvider(): array
+    {
+        return [
+            'error' => [
+                'expected' => "<11>1 1970-01-01T00:00:00.000000+00:00 " . gethostname() . " - " . getmypid() ." meh - ERROR: log  \n",
+                'dateTime' => new DateTimeImmutable("@0"),
+                'channel' => 'meh',
+                'level' => Level::Error,
+                'message' => 'log',
+            ],
+            'info' => [
+                'expected' => "<11>1 1970-01-01T00:00:00.000000+00:00 " . gethostname() . " - " . getmypid() ." meh - ERROR: log  \n",
+                'dateTime' => new DateTimeImmutable("@0"),
+                'channel' => 'meh',
+                'level' => Level::Error,
+                'message' => 'log',
+            ],
+            'with app name' => [
+                'expected' => "<11>1 1970-01-01T00:00:00.000000+00:00 " . gethostname() . " my-app " . getmypid() ." meh - ERROR: log  \n",
+                'dateTime' => new DateTimeImmutable("@0"),
+                'channel' => 'meh',
+                'level' => Level::Error,
+                'message' => 'log',
+                'appName' => 'my-app',
+            ],
+            'with context' => [
+                'expected' => "<11>1 1970-01-01T00:00:00.000000+00:00 " . gethostname() . " - " . getmypid() ." meh - ERROR: log {\"additional-context\":\"test\"} \n",
+                'dateTime' => new DateTimeImmutable("@0"),
+                'channel' => 'meh',
+                'level' => Level::Error,
+                'message' => 'log',
+                'appName' => null,
+                'context' => ['additional-context' => 'test'],
+            ],
+            'with extra' => [
+                'expected' => "<11>1 1970-01-01T00:00:00.000000+00:00 " . gethostname() . " - " . getmypid() ." meh - ERROR: log  {\"userId\":1}\n",
+                'dateTime' => new DateTimeImmutable("@0"),
+                'channel' => 'meh',
+                'level' => Level::Error,
+                'message' => 'log',
+                'appName' => null,
+                'context' => [],
+                'extra' => ['userId' => 1],
+            ],
+        ];
+    }
+}

tests/Monolog/Handler/SyslogUdpHandlerTest.php

@@ -35,7 +35,7 @@ class SyslogUdpHandlerTest extends TestCase
         $handler->setFormatter(new \Monolog\Formatter\ChromePHPFormatter());
 
         $time = '2014-01-07T12:34:56+00:00';
-        $socket = $this->getMockBuilder('Monolog\Handler\SyslogUdp\UdpSocket')
+        $socket = $this->getMockBuilder('Monolog\Handler\Syslog\SyslogUdp\UdpSocket')
             ->onlyMethods(['write'])
             ->setConstructorArgs(['lol'])
             ->getMock();
@@ -56,7 +56,7 @@ class SyslogUdpHandlerTest extends TestCase
         $handler = new SyslogUdpHandler("127.0.0.1", 514, "authpriv");
         $handler->setFormatter($this->getIdentityFormatter());
 
-        $socket = $this->getMockBuilder('Monolog\Handler\SyslogUdp\UdpSocket')
+        $socket = $this->getMockBuilder('Monolog\Handler\Syslog\SyslogUdp\UdpSocket')
             ->onlyMethods(['write'])
             ->setConstructorArgs(['lol'])
             ->getMock();
@@ -81,7 +81,7 @@ class SyslogUdpHandlerTest extends TestCase
 
         $handler->setFormatter(new \Monolog\Formatter\ChromePHPFormatter());
 
-        $socket = $this->getMockBuilder('\Monolog\Handler\SyslogUdp\UdpSocket')
+        $socket = $this->getMockBuilder('\Monolog\Handler\Syslog\SyslogUdp\UdpSocket')
             ->setConstructorArgs(['lol', 999])
             ->onlyMethods(['write'])
             ->getMock();

tests/Monolog/Handler/UdpSocketTest.php

@@ -12,7 +12,7 @@
 namespace Monolog\Handler;
 
 use Monolog\Test\TestCase;
-use Monolog\Handler\SyslogUdp\UdpSocket;
+use Monolog\Handler\Syslog\SyslogUdp\UdpSocket;
 
 /**
  * @requires extension sockets
@@ -21,7 +21,7 @@ class UdpSocketTest extends TestCase
 {
     public function testWeDoNotTruncateShortMessages()
     {
-        $socket = $this->getMockBuilder('Monolog\Handler\SyslogUdp\UdpSocket')
+        $socket = $this->getMockBuilder('Monolog\Handler\Syslog\SyslogUdp\UdpSocket')
             ->onlyMethods(['send'])
             ->setConstructorArgs(['lol'])
             ->getMock();
@@ -35,7 +35,7 @@ class UdpSocketTest extends TestCase
 
     public function testLongMessagesAreTruncated()
     {
-        $socket = $this->getMockBuilder('Monolog\Handler\SyslogUdp\UdpSocket')
+        $socket = $this->getMockBuilder('Monolog\Handler\Syslog\SyslogUdp\UdpSocket')
             ->onlyMethods(['send'])
             ->setConstructorArgs(['lol'])
             ->getMock();