Add newline to influx line-protocol if not present

closes #2297

CHANGELOG.md

@@ -80,8 +80,9 @@ plugins, not just statsd.
 - [#1973](https://github.com/influxdata/telegraf/issues/1973): Partial fix: logparser CLF pattern with IPv6 addresses.
 - [#1975](https://github.com/influxdata/telegraf/issues/1975) & [#2102](https://github.com/influxdata/telegraf/issues/2102): Fix thread-safety when using multiple instances of the statsd input plugin.
 - [#2027](https://github.com/influxdata/telegraf/issues/2027): docker input: interface conversion panic fix.
-- [#1814](https://github.com/influxdata/telegraf/issues/1814): snmp: ensure proper context is present on error messages
+- [#1814](https://github.com/influxdata/telegraf/issues/1814): snmp: ensure proper context is present on error messages.
 - [#2299](https://github.com/influxdata/telegraf/issues/2299): opentsdb: add tcp:// prefix if no scheme provided.
+- [#2297](https://github.com/influxdata/telegraf/issues/2297): influx parser: parse line-protocol without newlines.
 
 ## v1.1.2 [2016-12-12]
 

plugins/inputs/http_listener/http_listener.go

@@ -300,9 +300,6 @@ func (h *HTTPListener) serveWrite(res http.ResponseWriter, req *http.Request) {
 }
 
 func (h *HTTPListener) parse(b []byte, t time.Time) error {
-	if !bytes.HasSuffix(b, []byte("\n")) {
-		b = append(b, '\n')
-	}
 	metrics, err := h.parser.ParseWithDefaultTime(b, t)
 
 	for _, m := range metrics {

plugins/parsers/influx/parser.go

@@ -16,6 +16,9 @@ type InfluxParser struct {
 }
 
 func (p *InfluxParser) ParseWithDefaultTime(buf []byte, t time.Time) ([]telegraf.Metric, error) {
+	if !bytes.HasSuffix(buf, []byte("\n")) {
+		buf = append(buf, '\n')
+	}
 	// parse even if the buffer begins with a newline
 	buf = bytes.TrimPrefix(buf, []byte("\n"))
 	metrics, err := metric.ParseWithDefaultTime(buf, t)

plugins/parsers/influx/parser_test.go

@@ -18,10 +18,11 @@ var (
 )
 
 const (
-	validInflux        = "cpu_load_short,cpu=cpu0 value=10 1257894000000000000\n"
-	validInfluxNewline = "\ncpu_load_short,cpu=cpu0 value=10 1257894000000000000\n"
-	invalidInflux      = "I don't think this is line protocol\n"
-	invalidInflux2     = "{\"a\": 5, \"b\": {\"c\": 6}}\n"
+	validInflux          = "cpu_load_short,cpu=cpu0 value=10 1257894000000000000\n"
+	validInfluxNewline   = "\ncpu_load_short,cpu=cpu0 value=10 1257894000000000000\n"
+	validInfluxNoNewline = "cpu_load_short,cpu=cpu0 value=10 1257894000000000000"
+	invalidInflux        = "I don't think this is line protocol\n"
+	invalidInflux2       = "{\"a\": 5, \"b\": {\"c\": 6}}\n"
 )
 
 const influxMulti = `
@@ -69,6 +70,18 @@ func TestParseValidInflux(t *testing.T) {
 		"cpu": "cpu0",
 	}, metrics[0].Tags())
 	assert.Equal(t, exptime, metrics[0].Time().UnixNano())
+
+	metrics, err = parser.Parse([]byte(validInfluxNoNewline))
+	assert.NoError(t, err)
+	assert.Len(t, metrics, 1)
+	assert.Equal(t, "cpu_load_short", metrics[0].Name())
+	assert.Equal(t, map[string]interface{}{
+		"value": float64(10),
+	}, metrics[0].Fields())
+	assert.Equal(t, map[string]string{
+		"cpu": "cpu0",
+	}, metrics[0].Tags())
+	assert.Equal(t, exptime, metrics[0].Time().UnixNano())
 }
 
 func TestParseLineValidInflux(t *testing.T) {