[jira] [Created] (LOG4NET-370) RemoteSyslogAppender doesn't properly handle newline in log message

["Jarrod Alexander (JIRA)" <ji...@apache.org>]

Jarrod Alexander created LOG4NET-370:
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             Summary: RemoteSyslogAppender doesn't properly handle newline in log message
                 Key: LOG4NET-370
                 URL: https://issues.apache.org/jira/browse/LOG4NET-370
             Project: Log4net
          Issue Type: Bug
          Components: Appenders
            Reporter: Jarrod Alexander


RemoteSyslogAppender sends log messages containing newline characters to syslog, however the syslog RFC 3164 states that the message portion of the syslog packet can only contain visible ASCII characters and spaces.  This causes multiline log messages to render on a single line in at least some instances.

The solution appears to be sending each line of the log message as a separate syslog packet.  I have modified RemoteSyslogAppender to support this behavior and will provide a patch file.

Here is the relevant portion of the RFC:

4.1.3 MSG Part of a syslog Packet

   The MSG part will fill the remainder of the syslog packet.  This will
   usually contain some additional information of the process that
   generated the message, and then the text of the message.  There is no
   ending delimiter to this part.  The MSG part of the syslog packet
   MUST contain visible (printing) characters.  The code set
   traditionally and most often used has also been seven-bit ASCII in an
   eight-bit field like that used in the PRI and HEADER parts.  In this
   code set, the only allowable characters are the ABNF VCHAR values
   (%d33-126) and spaces (SP value %d32).  However, no indication of the
   code set used within the MSG is required, nor is it expected.  Other
   code sets MAY be used as long as the characters used in the MSG are
   exclusively visible characters and spaces similar to those described
   above.  The selection of a code set used in the MSG part SHOULD be
   made with thoughts of the intended receiver.  A message containing
   characters in a code set that cannot be viewed or understood by a
   recipient will yield no information of value to an operator or
   administrator looking at it.

http://www.ietf.org/rfc/rfc3164.txt

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