From 5bee6fe56c2e8d1fc22b5188d49b6a2500df065f Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Wed, 17 Dec 2014 10:46:48 +0000
Subject: [PATCH] Fix syslog transport to follow the spec closer, fixes #476

---
 src/Monolog/Handler/SyslogUdp/UdpSocket.php | 26 ++++----------------
 tests/Monolog/Handler/UdpSocketTest.php     | 27 ++++++---------------
 2 files changed, 13 insertions(+), 40 deletions(-)

diff --git a/src/Monolog/Handler/SyslogUdp/UdpSocket.php b/src/Monolog/Handler/SyslogUdp/UdpSocket.php
index d87ab9d3..dcf3f1f9 100644
--- a/src/Monolog/Handler/SyslogUdp/UdpSocket.php
+++ b/src/Monolog/Handler/SyslogUdp/UdpSocket.php
@@ -13,7 +13,7 @@ namespace Monolog\Handler\SyslogUdp;
 
 class UdpSocket
 {
-    const DATAGRAM_MAX_LENGTH = 2048;
+    const DATAGRAM_MAX_LENGTH = 65023;
 
     public function __construct($ip, $port = 514)
     {
@@ -24,11 +24,7 @@ class UdpSocket
 
     public function write($line, $header = "")
     {
-        $remaining = $line;
-        while (!is_null($remaining)) {
-            list($chunk, $remaining) = $this->splitLineIfNessesary($remaining, $header);
-            $this->send($chunk);
-        }
+        $this->send($this->assembleMessage($line, $header));
     }
 
     public function close()
@@ -41,22 +37,10 @@ class UdpSocket
         socket_sendto($this->socket, $chunk, strlen($chunk), $flags = 0, $this->ip, $this->port);
     }
 
-    protected function splitLineIfNessesary($line, $header)
+    protected function assembleMessage($line, $header)
     {
-        if ($this->shouldSplitLine($line, $header)) {
-            $chunkSize = self::DATAGRAM_MAX_LENGTH - strlen($header);
-            $chunk = $header . substr($line, 0, $chunkSize);
-            $remaining = substr($line, $chunkSize);
-        } else {
-            $chunk = $header . $line;
-            $remaining = null;
-        }
+        $chunkSize = self::DATAGRAM_MAX_LENGTH - strlen($header);
 
-        return array($chunk, $remaining);
-    }
-
-    protected function shouldSplitLine($remaining, $header)
-    {
-        return strlen($header.$remaining) > self::DATAGRAM_MAX_LENGTH;
+        return $header . substr($line, 0, $chunkSize);
     }
 }
diff --git a/tests/Monolog/Handler/UdpSocketTest.php b/tests/Monolog/Handler/UdpSocketTest.php
index b251974e..bcaf52b3 100644
--- a/tests/Monolog/Handler/UdpSocketTest.php
+++ b/tests/Monolog/Handler/UdpSocketTest.php
@@ -18,7 +18,7 @@ use Monolog\TestCase;
  */
 class UdpSocketTest extends TestCase
 {
-    public function testWeDoNotSplitShortMessages()
+    public function testWeDoNotTruncateShortMessages()
     {
         $socket = $this->getMock('\Monolog\Handler\SyslogUdp\UdpSocket', array('send'), array('lol', 'lol'));
 
@@ -29,29 +29,18 @@ class UdpSocketTest extends TestCase
         $socket->write("The quick brown fox jumps over the lazy dog", "HEADER: ");
     }
 
-    public function testWeSplitLongMessages()
+    public function testLongMessagesAreTruncated()
     {
         $socket = $this->getMock('\Monolog\Handler\SyslogUdp\UdpSocket', array('send'), array('lol', 'lol'));
 
-        $socket->expects($this->at(1))
+        $truncatedString = str_repeat("derp", 16254).'d';
+
+        $socket->expects($this->exactly(1))
             ->method('send')
-            ->with("The quick brown fox jumps over the lazy dog");
+            ->with("HEADER" . $truncatedString);
 
-        $aStringOfLength2048 = str_repeat("derp", 2048/4);
+        $longString = str_repeat("derp", 20000);
 
-        $socket->write($aStringOfLength2048."The quick brown fox jumps over the lazy dog");
-    }
-
-    public function testAllSplitMessagesHasAHeader()
-    {
-        $socket = $this->getMock('\Monolog\Handler\SyslogUdp\UdpSocket', array('send'), array('lol', 'lol'));
-
-        $socket->expects($this->exactly(5))
-            ->method('send')
-            ->with($this->stringStartsWith("HEADER"));
-
-        $aStringOfLength8192 = str_repeat("derp", 2048);
-
-        $socket->write($aStringOfLength8192, "HEADER");
+        $socket->write($longString, "HEADER");
     }
 }