Golang util.APIRequestNegotiateV1函数代码示例

func TestTombstoneRecover(t *testing.T) {
	opts := NewNSQLookupdOptions()
	opts.Logger = newTestLogger(t)
	opts.TombstoneLifetime = 50 * time.Millisecond
	tcpAddr, httpAddr, nsqlookupd := mustStartLookupd(opts)
	defer nsqlookupd.Exit()

	topicName := "tombstone_recover"
	topicName2 := topicName + "2"

	conn := mustConnectLookupd(t, tcpAddr)
	defer conn.Close()

	identify(t, conn, "ip.address", 5000, 5555, "fake-version")

	nsq.Register(topicName, "channel1").WriteTo(conn)
	_, err := nsq.ReadResponse(conn)
	equal(t, err, nil)

	nsq.Register(topicName2, "channel2").WriteTo(conn)
	_, err = nsq.ReadResponse(conn)
	equal(t, err, nil)

	endpoint := fmt.Sprintf("http://%s/topic/tombstone?topic=%s&node=%s",
		httpAddr, topicName, "ip.address:5555")
	_, err = util.APIRequestNegotiateV1("POST", endpoint, nil)
	equal(t, err, nil)

	endpoint = fmt.Sprintf("http://%s/lookup?topic=%s", httpAddr, topicName)
	data, err := util.APIRequestNegotiateV1("GET", endpoint, nil)
	equal(t, err, nil)
	producers, _ := data.Get("producers").Array()
	equal(t, len(producers), 0)

	endpoint = fmt.Sprintf("http://%s/lookup?topic=%s", httpAddr, topicName2)
	data, err = util.APIRequestNegotiateV1("GET", endpoint, nil)
	equal(t, err, nil)
	producers, _ = data.Get("producers").Array()
	equal(t, len(producers), 1)

	time.Sleep(75 * time.Millisecond)

	endpoint = fmt.Sprintf("http://%s/lookup?topic=%s", httpAddr, topicName)
	data, err = util.APIRequestNegotiateV1("GET", endpoint, nil)
	equal(t, err, nil)
	producers, _ = data.Get("producers").Array()
	equal(t, len(producers), 1)
}

// GetLookupdTopicChannels returns a []string containing a union of the channels
// from all the given lookupd for the given topic
func GetLookupdTopicChannels(topic string, lookupdHTTPAddrs []string) ([]string, error) {
	success := false
	allChannels := make([]string, 0)
	var lock sync.Mutex
	var wg sync.WaitGroup
	for _, addr := range lookupdHTTPAddrs {
		wg.Add(1)
		endpoint := fmt.Sprintf("http://%s/channels?topic=%s", addr, url.QueryEscape(topic))
		log.Printf("LOOKUPD: querying %s", endpoint)
		go func(endpoint string) {
			data, err := util.APIRequestNegotiateV1("GET", endpoint, nil)
			lock.Lock()
			defer lock.Unlock()
			defer wg.Done()
			if err != nil {
				log.Printf("ERROR: lookupd %s - %s", endpoint, err.Error())
				return
			}
			success = true
			// {"data":{"channels":["test"]}}
			channels, _ := data.Get("channels").StringArray()
			allChannels = util.StringUnion(allChannels, channels)
		}(endpoint)
	}
	wg.Wait()
	sort.Strings(allChannels)
	if success == false {
		return nil, errors.New("unable to query any lookupd")
	}
	return allChannels, nil
}

// GetNSQDTopics returns a []string containing all the topics
// produced by the given nsqd
func GetNSQDTopics(nsqdHTTPAddrs []string) ([]string, error) {
	topics := make([]string, 0)
	var lock sync.Mutex
	var wg sync.WaitGroup
	success := false
	for _, addr := range nsqdHTTPAddrs {
		wg.Add(1)
		endpoint := fmt.Sprintf("http://%s/stats?format=json", addr)
		log.Printf("NSQD: querying %s", endpoint)

		go func(endpoint string) {
			data, err := util.APIRequestNegotiateV1("GET", endpoint, nil)
			lock.Lock()
			defer lock.Unlock()
			defer wg.Done()
			if err != nil {
				log.Printf("ERROR: lookupd %s - %s", endpoint, err.Error())
				return
			}
			success = true
			topicList, _ := data.Get("topics").Array()
			for i := range topicList {
				topicInfo := data.Get("topics").GetIndex(i)
				topics = util.StringAdd(topics, topicInfo.Get("topic_name").MustString())
			}
		}(endpoint)
	}
	wg.Wait()
	sort.Strings(topics)
	if success == false {
		return nil, errors.New("unable to query any nsqd")
	}
	return topics, nil
}

func (s *httpServer) deleteChannelHandler(w http.ResponseWriter, req *http.Request) {
	if req.Method != "POST" {
		s.ctx.nsqadmin.logf("ERROR: invalid %s to POST only method", req.Method)
		http.Error(w, "INVALID_REQUEST", 500)
		return
	}
	reqParams := &util.PostParams{req}

	topicName, channelName, err := util.GetTopicChannelArgs(reqParams)
	if err != nil {
		http.Error(w, err.Error(), 500)
		return
	}

	rd, _ := reqParams.Get("rd")
	if !strings.HasPrefix(rd, "/") {
		rd = fmt.Sprintf("/topic/%s", url.QueryEscape(topicName))
	}

	for _, addr := range s.ctx.nsqadmin.opts.NSQLookupdHTTPAddresses {
		nsqlookupdVersion, err := lookupd.GetVersion(addr)
		if err != nil {
			s.ctx.nsqadmin.logf("ERROR: failed to get nsqlookupd %s version - %s", addr, err)
		}

		uri := "delete_channel"
		if !nsqlookupdVersion.Less(v1EndpointVersion) {
			uri = "channel/delete"
		}

		endpoint := fmt.Sprintf("http://%s/%s?topic=%s&channel=%s",
			addr, uri,
			url.QueryEscape(topicName),
			url.QueryEscape(channelName))
		s.ctx.nsqadmin.logf("LOOKUPD: querying %s", endpoint)
		_, err = util.APIRequestNegotiateV1("POST", endpoint, nil)
		if err != nil {
			s.ctx.nsqadmin.logf("ERROR: lookupd %s - %s", endpoint, err)
			continue
		}
	}

	producerAddrs := s.getProducers(topicName)
	s.performVersionNegotiatedRequestsToNSQD(
		s.ctx.nsqadmin.opts.NSQLookupdHTTPAddresses,
		producerAddrs,
		"delete_channel",
		"channel/delete",
		fmt.Sprintf("topic=%s&channel=%s",
			url.QueryEscape(topicName), url.QueryEscape(channelName)))

	s.notifyAdminAction("delete_channel", topicName, channelName, "", req)

	http.Redirect(w, req, rd, 302)
}

func (s *httpServer) deleteTopicHandler(w http.ResponseWriter, req *http.Request) {
	if req.Method != "POST" {
		s.ctx.nsqadmin.logf("ERROR: invalid %s to POST only method", req.Method)
		http.Error(w, "INVALID_REQUEST", 500)
		return
	}
	reqParams := &util.PostParams{req}

	topicName, err := reqParams.Get("topic")
	if err != nil {
		http.Error(w, "MISSING_ARG_TOPIC", 500)
		return
	}

	rd, _ := reqParams.Get("rd")
	if !strings.HasPrefix(rd, "/") {
		rd = "/"
	}

	// for topic removal, you need to get all the producers *first*
	producerAddrs := s.getProducers(topicName)

	// remove the topic from all the lookupds
	for _, addr := range s.ctx.nsqadmin.opts.NSQLookupdHTTPAddresses {
		nsqlookupdVersion, err := lookupd.GetVersion(addr)
		if err != nil {
			s.ctx.nsqadmin.logf("ERROR: failed to get nsqlookupd %s version - %s", addr, err)
		}

		uri := "delete_topic"
		if !nsqlookupdVersion.Less(v1EndpointVersion) {
			uri = "topic/delete"
		}

		endpoint := fmt.Sprintf("http://%s/%s?topic=%s", addr, uri, topicName)
		s.ctx.nsqadmin.logf("LOOKUPD: querying %s", endpoint)
		_, err = util.APIRequestNegotiateV1("POST", endpoint, nil)
		if err != nil {
			s.ctx.nsqadmin.logf("ERROR: lookupd %s - %s", endpoint, err)
			continue
		}
	}

	s.performVersionNegotiatedRequestsToNSQD(
		s.ctx.nsqadmin.opts.NSQLookupdHTTPAddresses,
		producerAddrs,
		"delete_topic",
		"topic/delete",
		fmt.Sprintf("topic=%s", url.QueryEscape(topicName)))

	s.notifyAdminAction("delete_topic", topicName, "", "", req)

	http.Redirect(w, req, rd, 302)
}

// GetVersion returns a semver.Version object by querying /info
func GetVersion(addr string) (*semver.Version, error) {
	endpoint := fmt.Sprintf("http://%s/info", addr)
	log.Printf("version negotiation %s", endpoint)
	info, err := util.APIRequestNegotiateV1("GET", endpoint, nil)
	if err != nil {
		log.Printf("ERROR: %s - %s", endpoint, err)
		return nil, err
	}
	version := info.Get("version").MustString("unknown")
	return semver.Parse(version)
}

func TestTombstoneUnregister(t *testing.T) {
	log.SetOutput(ioutil.Discard)
	defer log.SetOutput(os.Stdout)

	options := NewNSQLookupdOptions()
	options.TombstoneLifetime = 50 * time.Millisecond
	tcpAddr, httpAddr, nsqlookupd := mustStartLookupd(options)
	defer nsqlookupd.Exit()

	topicName := "tombstone_unregister"

	conn := mustConnectLookupd(t, tcpAddr)
	identify(t, conn, "ip.address", 5000, 5555, "fake-version")

	nsq.Register(topicName, "channel1").WriteTo(conn)
	_, err := nsq.ReadResponse(conn)
	assert.Equal(t, err, nil)

	endpoint := fmt.Sprintf("http://%s/topic/tombstone?topic=%s&node=%s",
		httpAddr, topicName, "ip.address:5555")
	_, err = util.APIRequestNegotiateV1("POST", endpoint, nil)
	assert.Equal(t, err, nil)

	endpoint = fmt.Sprintf("http://%s/lookup?topic=%s", httpAddr, topicName)
	data, err := util.APIRequestNegotiateV1("GET", endpoint, nil)
	assert.Equal(t, err, nil)
	producers, _ := data.Get("producers").Array()
	assert.Equal(t, len(producers), 0)

	nsq.UnRegister(topicName, "").WriteTo(conn)
	_, err = nsq.ReadResponse(conn)
	assert.Equal(t, err, nil)

	time.Sleep(55 * time.Millisecond)

	endpoint = fmt.Sprintf("http://%s/lookup?topic=%s", httpAddr, topicName)
	data, err = util.APIRequestNegotiateV1("GET", endpoint, nil)
	assert.Equal(t, err, nil)
	producers, _ = data.Get("producers").Array()
	assert.Equal(t, len(producers), 0)
}

func TestTombstonedNodes(t *testing.T) {
	log.SetOutput(ioutil.Discard)
	defer log.SetOutput(os.Stdout)

	options := NewNSQLookupdOptions()
	tcpAddr, httpAddr, nsqlookupd := mustStartLookupd(options)
	defer nsqlookupd.Exit()

	lookupdHTTPAddrs := []string{fmt.Sprintf("%s", httpAddr)}

	topicName := "inactive_nodes"

	conn := mustConnectLookupd(t, tcpAddr)
	identify(t, conn, "ip.address", 5000, 5555, "fake-version")

	go func() {
		for {
			time.Sleep(5 * time.Millisecond)
			nsq.Ping().WriteTo(conn)
			_, err := nsq.ReadResponse(conn)
			if err != nil {
				return
			}
		}
	}()

	nsq.Register(topicName, "channel1").WriteTo(conn)
	_, err := nsq.ReadResponse(conn)
	assert.Equal(t, err, nil)

	producers, _ := lookuputil.GetLookupdProducers(lookupdHTTPAddrs)
	assert.Equal(t, len(producers), 1)
	assert.Equal(t, len(producers[0].Topics), 1)
	assert.Equal(t, producers[0].Topics[0].Topic, topicName)
	assert.Equal(t, producers[0].Topics[0].Tombstoned, false)

	endpoint := fmt.Sprintf("http://%s/topic/tombstone?topic=%s&node=%s",
		httpAddr, topicName, "ip.address:5555")
	_, err = util.APIRequestNegotiateV1("POST", endpoint, nil)
	assert.Equal(t, err, nil)

	producers, _ = lookuputil.GetLookupdProducers(lookupdHTTPAddrs)
	assert.Equal(t, len(producers), 1)
	assert.Equal(t, len(producers[0].Topics), 1)
	assert.Equal(t, producers[0].Topics[0].Topic, topicName)
	assert.Equal(t, producers[0].Topics[0].Tombstoned, true)

	conn.Close()
}

func TestChannelUnregister(t *testing.T) {
	opts := NewNSQLookupdOptions()
	opts.Logger = newTestLogger(t)
	tcpAddr, httpAddr, nsqlookupd := mustStartLookupd(opts)
	defer nsqlookupd.Exit()

	topics := nsqlookupd.DB.FindRegistrations("topic", "*", "*")
	equal(t, len(topics), 0)

	topicName := "channel_unregister"

	conn := mustConnectLookupd(t, tcpAddr)
	defer conn.Close()

	tcpPort := 5000
	httpPort := 5555
	identify(t, conn, "ip.address", tcpPort, httpPort, "fake-version")

	nsq.Register(topicName, "ch1").WriteTo(conn)
	v, err := nsq.ReadResponse(conn)
	equal(t, err, nil)
	equal(t, v, []byte("OK"))

	topics = nsqlookupd.DB.FindRegistrations("topic", topicName, "")
	equal(t, len(topics), 1)

	channels := nsqlookupd.DB.FindRegistrations("channel", topicName, "*")
	equal(t, len(channels), 1)

	nsq.UnRegister(topicName, "ch1").WriteTo(conn)
	v, err = nsq.ReadResponse(conn)
	equal(t, err, nil)
	equal(t, v, []byte("OK"))

	topics = nsqlookupd.DB.FindRegistrations("topic", topicName, "")
	equal(t, len(topics), 1)

	// we should still have mention of the topic even though there is no producer
	// (ie. we haven't *deleted* the channel, just unregistered as a producer)
	channels = nsqlookupd.DB.FindRegistrations("channel", topicName, "*")
	equal(t, len(channels), 1)

	endpoint := fmt.Sprintf("http://%s/lookup?topic=%s", httpAddr, topicName)
	data, err := util.APIRequestNegotiateV1("GET", endpoint, nil)
	equal(t, err, nil)
	returnedProducers, err := data.Get("producers").Array()
	equal(t, err, nil)
	equal(t, len(returnedProducers), 1)
}

func TestClientAttributes(t *testing.T) {
	log.SetOutput(ioutil.Discard)
	defer log.SetOutput(os.Stdout)

	userAgent := "Test User Agent"

	options := NewNSQDOptions()
	options.Verbose = true
	options.SnappyEnabled = true
	tcpAddr, httpAddr, nsqd := mustStartNSQD(options)
	defer nsqd.Exit()

	conn, err := mustConnectNSQD(tcpAddr)
	assert.Equal(t, err, nil)

	data := identify(t, conn, map[string]interface{}{
		"snappy":     true,
		"user_agent": userAgent,
	}, frameTypeResponse)
	resp := struct {
		Snappy    bool   `json:"snappy"`
		UserAgent string `json:"user_agent"`
	}{}
	err = json.Unmarshal(data, &resp)
	assert.Equal(t, err, nil)
	assert.Equal(t, resp.Snappy, true)

	r := snappystream.NewReader(conn, snappystream.SkipVerifyChecksum)
	w := snappystream.NewWriter(conn)

	topicName := "test_client_attributes" + strconv.Itoa(int(time.Now().Unix()))
	sub(t, readWriter{r, w}, topicName, "ch")

	// need to give nsqd a chance to sub the client
	time.Sleep(50 * time.Millisecond)

	testUrl := fmt.Sprintf("http://127.0.0.1:%d/stats?format=json", httpAddr.Port)

	statsData, err := util.APIRequestNegotiateV1("GET", testUrl, nil)
	if err != nil {
		t.Fatalf(err.Error())
	}
	client := statsData.Get("topics").GetIndex(0).Get("channels").GetIndex(0).Get("clients").GetIndex(0)
	assert.Equal(t, client.Get("user_agent").MustString(), userAgent)
	assert.Equal(t, client.Get("snappy").MustBool(), true)
}

func TestClientAttributes(t *testing.T) {
	userAgent := "Test User Agent"

	opts := NewNSQDOptions()
	opts.Logger = newTestLogger(t)
	opts.Verbose = true
	opts.SnappyEnabled = true
	tcpAddr, httpAddr, nsqd := mustStartNSQD(opts)
	defer nsqd.Exit()

	conn, err := mustConnectNSQD(tcpAddr)
	equal(t, err, nil)
	defer conn.Close()

	data := identify(t, conn, map[string]interface{}{
		"snappy":     true,
		"user_agent": userAgent,
	}, frameTypeResponse)
	resp := struct {
		Snappy    bool   `json:"snappy"`
		UserAgent string `json:"user_agent"`
	}{}
	err = json.Unmarshal(data, &resp)
	equal(t, err, nil)
	equal(t, resp.Snappy, true)

	r := snappystream.NewReader(conn, snappystream.SkipVerifyChecksum)
	w := snappystream.NewWriter(conn)
	readValidate(t, r, frameTypeResponse, "OK")

	topicName := "test_client_attributes" + strconv.Itoa(int(time.Now().Unix()))
	sub(t, readWriter{r, w}, topicName, "ch")

	testUrl := fmt.Sprintf("http://127.0.0.1:%d/stats?format=json", httpAddr.Port)

	statsData, err := util.APIRequestNegotiateV1("GET", testUrl, nil)
	equal(t, err, nil)

	client := statsData.Get("topics").GetIndex(0).Get("channels").GetIndex(0).Get("clients").GetIndex(0)
	equal(t, client.Get("user_agent").MustString(), userAgent)
	equal(t, client.Get("snappy").MustBool(), true)
}

// GetLookupdTopicProducers returns a []string of the broadcast_address:http_port of all the
// producers for a given topic by unioning the results returned from the given lookupd
func GetLookupdTopicProducers(topic string, lookupdHTTPAddrs []string) ([]string, error) {
	success := false
	allSources := make([]string, 0)
	var lock sync.Mutex
	var wg sync.WaitGroup

	for _, addr := range lookupdHTTPAddrs {
		wg.Add(1)

		endpoint := fmt.Sprintf("http://%s/lookup?topic=%s", addr, url.QueryEscape(topic))
		log.Printf("LOOKUPD: querying %s", endpoint)

		go func(endpoint string) {
			data, err := util.APIRequestNegotiateV1("GET", endpoint, nil)
			lock.Lock()
			defer lock.Unlock()
			defer wg.Done()
			if err != nil {
				log.Printf("ERROR: lookupd %s - %s", endpoint, err.Error())
				return
			}
			success = true
			producers := data.Get("producers")
			producersArray, _ := producers.Array()
			for i := range producersArray {
				producer := producers.GetIndex(i)
				broadcastAddress := producer.Get("broadcast_address").MustString()
				httpPort := producer.Get("http_port").MustInt()
				key := net.JoinHostPort(broadcastAddress, strconv.Itoa(httpPort))
				allSources = util.StringAdd(allSources, key)
			}
		}(endpoint)
	}
	wg.Wait()
	if success == false {
		return nil, errors.New("unable to query any lookupd")
	}
	return allSources, nil
}

func (s *httpServer) performVersionNegotiatedRequestsToNSQD(
	nsqlookupdAddrs []string, nsqdAddrs []string,
	deprecatedURI string, v1URI string, queryString string) {
	var err error
	// get producer structs in one set of up-front requests
	// so we can negotiate versions
	//
	// (this returns an empty list if there are no nsqlookupd configured)
	producers, _ := lookupd.GetLookupdProducers(nsqlookupdAddrs)
	for _, addr := range nsqdAddrs {
		var nodeVer *semver.Version

		uri := deprecatedURI
		producer := producerSearch(producers, addr)
		if producer != nil {
			nodeVer = producer.VersionObj
		} else {
			// we couldn't find the node in our list
			// so ask it for a version directly
			nodeVer, err = lookupd.GetVersion(addr)
			if err != nil {
				s.ctx.nsqadmin.logf("ERROR: failed to get nsqd %s version - %s", addr, err)
			}
		}

		if nodeVer != nil && !nodeVer.Less(v1EndpointVersion) {
			uri = v1URI
		}

		endpoint := fmt.Sprintf("http://%s/%s?%s", addr, uri, queryString)
		s.ctx.nsqadmin.logf("NSQD: querying %s", endpoint)
		_, err := util.APIRequestNegotiateV1("POST", endpoint, nil)
		if err != nil {
			s.ctx.nsqadmin.logf("ERROR: nsqd %s - %s", endpoint, err)
			continue
		}
	}
}

func TestTombstonedNodes(t *testing.T) {
	opts := NewNSQLookupdOptions()
	opts.Logger = newTestLogger(t)
	tcpAddr, httpAddr, nsqlookupd := mustStartLookupd(opts)
	defer nsqlookupd.Exit()

	lookupdHTTPAddrs := []string{fmt.Sprintf("%s", httpAddr)}

	topicName := "inactive_nodes"

	conn := mustConnectLookupd(t, tcpAddr)
	defer conn.Close()

	identify(t, conn, "ip.address", 5000, 5555, "fake-version")

	nsq.Register(topicName, "channel1").WriteTo(conn)
	_, err := nsq.ReadResponse(conn)
	equal(t, err, nil)

	producers, _ := lookuputil.GetLookupdProducers(lookupdHTTPAddrs)
	equal(t, len(producers), 1)
	equal(t, len(producers[0].Topics), 1)
	equal(t, producers[0].Topics[0].Topic, topicName)
	equal(t, producers[0].Topics[0].Tombstoned, false)

	endpoint := fmt.Sprintf("http://%s/topic/tombstone?topic=%s&node=%s",
		httpAddr, topicName, "ip.address:5555")
	_, err = util.APIRequestNegotiateV1("POST", endpoint, nil)
	equal(t, err, nil)

	producers, _ = lookuputil.GetLookupdProducers(lookupdHTTPAddrs)
	equal(t, len(producers), 1)
	equal(t, len(producers[0].Topics), 1)
	equal(t, producers[0].Topics[0].Topic, topicName)
	equal(t, producers[0].Topics[0].Tombstoned, true)
}

func TestNsqdToLookupd(t *testing.T) {
	topicName := "cluster_test" + strconv.Itoa(int(time.Now().Unix()))

	hostname, err := os.Hostname()
	equal(t, err, nil)

	url := fmt.Sprintf("http://127.0.0.1:4151/topic/create?topic=%s", topicName)
	_, err = util.APIRequestNegotiateV1("POST", url, nil)
	equal(t, err, nil)

	url = fmt.Sprintf("http://127.0.0.1:4151/channel/create?topic=%s&channel=ch", topicName)
	_, err = util.APIRequestNegotiateV1("POST", url, nil)
	equal(t, err, nil)

	// allow some time for nsqd to push info to nsqlookupd
	time.Sleep(350 * time.Millisecond)

	data, err := util.APIRequestNegotiateV1("GET", "http://127.0.0.1:4161/debug", nil)
	equal(t, err, nil)

	topicData := data.Get("topic:" + topicName + ":")
	producers, _ := topicData.Array()
	equal(t, len(producers), 1)

	producer := topicData.GetIndex(0)
	equal(t, producer.Get("hostname").MustString(), hostname)
	equal(t, producer.Get("broadcast_address").MustString(), hostname)
	equal(t, producer.Get("tcp_port").MustInt(), 4150)
	equal(t, producer.Get("tombstoned").MustBool(), false)

	channelData := data.Get("channel:" + topicName + ":ch")
	producers, _ = channelData.Array()
	equal(t, len(producers), 1)

	producer = topicData.GetIndex(0)
	equal(t, producer.Get("hostname").MustString(), hostname)
	equal(t, producer.Get("broadcast_address").MustString(), hostname)
	equal(t, producer.Get("tcp_port").MustInt(), 4150)
	equal(t, producer.Get("tombstoned").MustBool(), false)

	data, err = util.APIRequestNegotiateV1("GET", "http://127.0.0.1:4161/lookup?topic="+topicName, nil)
	equal(t, err, nil)

	producers, _ = data.Get("producers").Array()
	equal(t, len(producers), 1)

	producer = data.Get("producers").GetIndex(0)
	equal(t, producer.Get("hostname").MustString(), hostname)
	equal(t, producer.Get("broadcast_address").MustString(), hostname)
	equal(t, producer.Get("tcp_port").MustInt(), 4150)

	channels, _ := data.Get("channels").Array()
	equal(t, len(channels), 1)

	channel := channels[0].(string)
	equal(t, channel, "ch")

	data, err = util.APIRequestNegotiateV1("POST", "http://127.0.0.1:4151/topic/delete?topic="+topicName, nil)
	equal(t, err, nil)

	// allow some time for nsqd to push info to nsqlookupd
	time.Sleep(350 * time.Millisecond)

	data, err = util.APIRequestNegotiateV1("GET", "http://127.0.0.1:4161/lookup?topic="+topicName, nil)
	equal(t, err, nil)

	producers, _ = data.Get("producers").Array()
	equal(t, len(producers), 0)

	data, err = util.APIRequestNegotiateV1("GET", "http://127.0.0.1:4161/debug", nil)
	equal(t, err, nil)

	producers, _ = data.Get("topic:" + topicName + ":").Array()
	equal(t, len(producers), 0)

	producers, _ = data.Get("channel:" + topicName + ":ch").Array()
	equal(t, len(producers), 0)
}