remove debug output and add empty post body test

plugins/inputs/http_listener/http_listener.go

@@ -106,34 +106,25 @@ func (t *HttpListener) ServeHTTP(res http.ResponseWriter, req *http.Request) {
 		var path = req.URL.Path[1:]
 
 		if path == "write" {
-			log.Printf("Received write request: [%s]\n", string(body))
-
 			var metrics []telegraf.Metric
-			if len(body) == 0 {
+			metrics, err = t.parser.Parse(body)
-				log.Printf("No metrics to parse\n")
+			if err == nil {
+				t.storeMetrics(metrics)
 			} else {
-				metrics, err = t.parser.Parse(body)
+				log.Printf("Problem parsing body: [%s], Error: %s\n", string(body), err)
-				if err == nil {
+				res.WriteHeader(500)
-					t.storeMetrics(metrics)
+				res.Write([]byte("ERROR parsing metrics"))
-					log.Printf("Persisted %d metrics\n", len(metrics))
-				} else {
-					log.Printf("Problem parsing body: [%s], Error: %s\n", string(body), err)
-					res.WriteHeader(500)
-					res.Write([]byte("ERROR parsing metrics"))
-				}
-				res.WriteHeader(204)
-				res.Write([]byte(""))
 			}
+			res.WriteHeader(204)
+			res.Write([]byte(""))
 		} else if path == "query" {
 			// Deliver a dummy response to the query endpoint, as some InfluxDB clients test endpoint availability with a query
-			log.Printf("Received query request: [%s]\n", string(body))
 			res.Header().Set("Content-Type", "application/json")
 			res.Header().Set("X-Influxdb-Version", "1.0")
 			res.WriteHeader(200)
 			res.Write([]byte("{\"results\":[]}"))
 		} else {
 			// Don't know how to respond to calls to other endpoints
-			log.Printf("Received unknown %s request: [%s]\n", path, string(body))
 			res.WriteHeader(404)
 			res.Write([]byte("Not Found"))
 		}

plugins/inputs/http_listener/http_listener_test.go

@@ -22,6 +22,8 @@ cpu_load_short,host=server05 value=12.0 1422568543702900257
 cpu_load_short,host=server06 value=12.0 1422568543702900257
 `
 	badMsg = "blahblahblah: 42\n"
+
+	emptyMsg = ""
 )
 
 func newTestHttpListener() (*HttpListener) {
@@ -46,7 +48,7 @@ func TestWriteHTTP(t *testing.T) {
 	// post single message to listener
 	var resp, err = http.Post("http://localhost:8186/write?db=mydb", "", bytes.NewBuffer([]byte(testMsg)))
 	require.NoError(t, err)
-	require.EqualValues(t, resp.StatusCode, 204)
+	require.EqualValues(t, 204, resp.StatusCode)
 
 	time.Sleep(time.Millisecond * 15)
 	acc.AssertContainsTaggedFields(t, "cpu_load_short",
@@ -57,7 +59,7 @@ func TestWriteHTTP(t *testing.T) {
 	// post multiple message to listener
 	resp, err = http.Post("http://localhost:8186/write?db=mydb", "", bytes.NewBuffer([]byte(testMsgs)))
 	require.NoError(t, err)
-	require.EqualValues(t, resp.StatusCode, 204)
+	require.EqualValues(t, 204, resp.StatusCode)
 
 	time.Sleep(time.Millisecond * 15)
 	hostTags := []string{"server02", "server03",
@@ -85,7 +87,25 @@ func TestWriteHTTPInvalid(t *testing.T) {
 	// post single message to listener
 	var resp, err = http.Post("http://localhost:8186/write?db=mydb", "", bytes.NewBuffer([]byte(badMsg)))
 	require.NoError(t, err)
-	require.EqualValues(t, resp.StatusCode, 500)
+	require.EqualValues(t, 500, resp.StatusCode)
+}
+
+func TestWriteHTTPEmpty(t *testing.T) {
+	time.Sleep(time.Millisecond * 250)
+
+	listener := newTestHttpListener()
+	listener.parser, _ = parsers.NewInfluxParser()
+
+	acc := &testutil.Accumulator{}
+	require.NoError(t, listener.Start(acc))
+	defer listener.Stop()
+
+	time.Sleep(time.Millisecond * 25)
+
+	// post single message to listener
+	var resp, err = http.Post("http://localhost:8186/write?db=mydb", "", bytes.NewBuffer([]byte(emptyMsg)))
+	require.NoError(t, err)
+	require.EqualValues(t, 204, resp.StatusCode)
 }
 
 func TestQueryHTTP(t *testing.T) {
@@ -103,6 +123,6 @@ func TestQueryHTTP(t *testing.T) {
 	// post query to listener
 	var resp, err = http.Post("http://localhost:8186/query?db=&q=CREATE+DATABASE+IF+NOT+EXISTS+%22mydb%22", "", nil)
 	require.NoError(t, err)
-	require.EqualValues(t, resp.StatusCode, 200)
+	require.EqualValues(t, 200, resp.StatusCode)
 }