rfc5424: fix panic on empty msg

Author: mcuadros

rfc5424/rfc5424.go

@@ -531,8 +531,8 @@ func parseStructuredData(buff []byte, cursor *int, l int) (string, error) {
 	var found bool
 
 	if *cursor >= l {
-                return "-", nil
-        }
+		return "-", nil
+	}
 
 	if buff[*cursor] == NILVALUE {
 		*cursor++

rfc5424/rfc5424_test.go

@@ -23,9 +23,10 @@ func (s *Rfc5424TestSuite) TestParser_Valid(c *C) {
 		"<165>1 2003-08-24T05:14:15.000003-07:00 192.0.2.1 myproc 8710 - - %% It's time to make the do-nuts.",
 		// with STRUCTURED-DATA
 		`<165>1 2003-10-11T22:14:15.003Z mymachine.example.com evntslog - ID47 [exampleSDID@32473 iut="3" eventSource="Application" eventID="1011"] An application event log entry...`,
-
 		// STRUCTURED-DATA Only
 		`<165>1 2003-10-11T22:14:15.003Z mymachine.example.com evntslog - ID47 [exampleSDID@32473 iut="3" eventSource= "Application" eventID="1011"][examplePriority@32473 class="high"]`,
+		// STRUCTURED-DATA Only
+		`<165>1 2003-10-11T22:14:15.003Z mymachine.example.com evntslog - ID47 `,
 	}
 
 	tmpTs, err := time.Parse("-07:00", "-07:00")
@@ -84,6 +85,19 @@ func (s *Rfc5424TestSuite) TestParser_Valid(c *C) {
 			"structured_data": `[exampleSDID@32473 iut="3" eventSource= "Application" eventID="1011"][examplePriority@32473 class="high"]`,
 			"message":         "",
 		},
+		syslogparser.LogParts{
+			"priority":        165,
+			"facility":        20,
+			"severity":        5,
+			"version":         1,
+			"timestamp":       time.Date(2003, time.October, 11, 22, 14, 15, 3*10e5, time.UTC),
+			"hostname":        "mymachine.example.com",
+			"app_name":        "evntslog",
+			"proc_id":         "-",
+			"msg_id":          "ID47",
+			"structured_data": "-",
+			"message":         "",
+		},
 	}
 
 	c.Assert(len(fixtures), Equals, len(expected))