Fix panic with replaying a recording

CHANGELOG.md

@@ -34,6 +34,7 @@
 - [#1470](https://github.com/influxdata/kapacitor/pull/1470): Fix error messages for missing fields which are arguments to functions are not clear
 - [#1516](https://github.com/influxdata/kapacitor/pull/1516): Fix bad PagerDuty test the required server info.
 - [#1581](https://github.com/influxdata/kapacitor/pull/1581): Add SNMP sysUpTime to SNMP Trap service
+- [#1547](https://github.com/influxdata/kapacitor/issues/1547): Fix panic on recording replay with HTTPPostHandler.
 
 ## v1.3.3 [2017-08-11]
 

server/server_test.go

@@ -3440,6 +3440,213 @@ test value=1 0000000012
 	}
 }
 
+func TestServer_RecordReplayStreamWithPost(t *testing.T) {
+	s, cli := OpenDefaultServer()
+	defer s.Close()
+
+	id := "testStreamTask"
+	ttype := client.StreamTask
+	dbrps := []client.DBRP{{
+		Database:        "mydb",
+		RetentionPolicy: "myrp",
+	}}
+
+	tmpDir, err := ioutil.TempDir("", "testStreamTaskRecording")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tmpDir)
+	tick := `stream
+    |from()
+        .measurement('test')
+    |window()
+        .period(10s)
+        .every(10s)
+    |count('value')
+    |alert()
+        .id('test-count')
+        .message('{{ .ID }} got: {{ index .Fields "count" }}')
+        .crit(lambda: TRUE)
+        .post('http://localhost:8080')
+        .log('` + tmpDir + `/alert.log')
+`
+
+	task, err := cli.CreateTask(client.CreateTaskOptions{
+		ID:         id,
+		Type:       ttype,
+		DBRPs:      dbrps,
+		TICKscript: tick,
+		Status:     client.Disabled,
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	recording, err := cli.RecordStream(client.RecordStreamOptions{
+		ID:   "recordingid",
+		Task: task.ID,
+		Stop: time.Date(1970, 1, 1, 0, 0, 10, 0, time.UTC),
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if exp, got := "/kapacitor/v1/recordings/recordingid", recording.Link.Href; exp != got {
+		t.Errorf("unexpected recording.Link.Href got %s exp %s", got, exp)
+	}
+
+	points := `test value=1 0000000000
+test value=1 0000000001
+test value=1 0000000001
+test value=1 0000000002
+test value=1 0000000002
+test value=1 0000000003
+test value=1 0000000003
+test value=1 0000000004
+test value=1 0000000005
+test value=1 0000000005
+test value=1 0000000005
+test value=1 0000000006
+test value=1 0000000007
+test value=1 0000000008
+test value=1 0000000009
+test value=1 0000000010
+test value=1 0000000011
+test value=1 0000000012
+`
+	v := url.Values{}
+	v.Add("precision", "s")
+	s.MustWrite("mydb", "myrp", points, v)
+
+	retry := 0
+	for recording.Status == client.Running {
+		time.Sleep(100 * time.Millisecond)
+		recording, err = cli.Recording(recording.Link)
+		if err != nil {
+			t.Fatal(err)
+		}
+		retry++
+		if retry > 10 {
+			t.Fatal("failed to finish recording")
+		}
+	}
+	if recording.Status != client.Finished || recording.Error != "" {
+		t.Errorf("recording failed: %s", recording.Error)
+	}
+
+	replay, err := cli.CreateReplay(client.CreateReplayOptions{
+		ID:            "replayid",
+		Task:          id,
+		Recording:     recording.ID,
+		Clock:         client.Fast,
+		RecordingTime: true,
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if exp, got := "/kapacitor/v1/replays/replayid", replay.Link.Href; exp != got {
+		t.Errorf("unexpected replay.Link.Href got %s exp %s", got, exp)
+	}
+	if exp, got := id, replay.Task; exp != got {
+		t.Errorf("unexpected replay.Task got %s exp %s", got, exp)
+	}
+
+	retry = 0
+	for replay.Status == client.Running {
+		time.Sleep(100 * time.Millisecond)
+		replay, err = cli.Replay(replay.Link)
+		if err != nil {
+			t.Fatal(err)
+		}
+		retry++
+		if retry > 10 {
+			t.Fatal("failed to finish replay")
+		}
+	}
+	if replay.Status != client.Finished || replay.Error != "" {
+		t.Errorf("replay failed: %s", replay.Error)
+	}
+
+	f, err := os.Open(filepath.Join(tmpDir, "alert.log"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer f.Close()
+	type response struct {
+		ID      string          `json:"id"`
+		Message string          `json:"message"`
+		Time    time.Time       `json:"time"`
+		Level   string          `json:"level"`
+		Data    influxql.Result `json:"data"`
+	}
+	exp := response{
+		ID:      "test-count",
+		Message: "test-count got: 15",
+		Time:    time.Date(1970, 1, 1, 0, 0, 10, 0, time.UTC),
+		Level:   "CRITICAL",
+		Data: influxql.Result{
+			Series: imodels.Rows{
+				{
+					Name:    "test",
+					Columns: []string{"time", "count"},
+					Values: [][]interface{}{
+						{
+							time.Date(1970, 1, 1, 0, 0, 10, 0, time.UTC).Format(time.RFC3339Nano),
+							15.0,
+						},
+					},
+				},
+			},
+		},
+	}
+	got := response{}
+	d := json.NewDecoder(f)
+	d.Decode(&got)
+	if !reflect.DeepEqual(exp, got) {
+		t.Errorf("unexpected alert log:\ngot %v\nexp %v", got, exp)
+	}
+
+	recordings, err := cli.ListRecordings(nil)
+	if err != nil {
+		t.Error(err)
+	}
+	if exp, got := 1, len(recordings); exp != got {
+		t.Fatalf("unexpected recordings list:\ngot %v\nexp %v\nrecordings %v", got, exp, recordings)
+	}
+
+	err = cli.DeleteRecording(recordings[0].Link)
+	if err != nil {
+		t.Error(err)
+	}
+
+	recordings, err = cli.ListRecordings(nil)
+	if err != nil {
+		t.Error(err)
+	}
+	if exp, got := 0, len(recordings); exp != got {
+		t.Errorf("unexpected recordings list after delete:\ngot %v\nexp %v\nrecordings %v", got, exp, recordings)
+	}
+
+	replays, err := cli.ListReplays(nil)
+	if err != nil {
+		t.Error(err)
+	}
+	if exp, got := 1, len(replays); exp != got {
+		t.Fatalf("unexpected replays list:\ngot %v\nexp %v\nreplays %v", got, exp, replays)
+	}
+
+	err = cli.DeleteReplay(replays[0].Link)
+	if err != nil {
+		t.Error(err)
+	}
+
+	replays, err = cli.ListReplays(nil)
+	if err != nil {
+		t.Error(err)
+	}
+	if exp, got := 0, len(replays); exp != got {
+		t.Errorf("unexpected replays list after delete:\ngot %v\nexp %v\nreplays %v", got, exp, replays)
+	}
+}
+
 func TestServer_RecordReplayBatch(t *testing.T) {
 	c := NewConfig()
 	c.InfluxDB[0].Enabled = true

task_master.go

@@ -252,6 +252,7 @@ func (tm *TaskMaster) New(id string) *TaskMaster {
 	n.VictorOpsService = tm.VictorOpsService
 	n.PagerDutyService = tm.PagerDutyService
 	n.PushoverService = tm.PushoverService
+	n.HTTPPostService = tm.HTTPPostService
 	n.SlackService = tm.SlackService
 	n.TelegramService = tm.TelegramService
 	n.SNMPTrapService = tm.SNMPTrapService