Golang http_api.NewReqParams函數代碼示例

func (s *httpServer) doTombstoneTopicProducer(w http.ResponseWriter, req *http.Request, ps httprouter.Params) (interface{}, error) {
	reqParams, err := http_api.NewReqParams(req)
	if err != nil {
		return nil, http_api.Err{400, "INVALID_REQUEST"}
	}

	topicName, err := reqParams.Get("topic")
	if err != nil {
		return nil, http_api.Err{400, "MISSING_ARG_TOPIC"}
	}

	node, err := reqParams.Get("node")
	if err != nil {
		return nil, http_api.Err{400, "MISSING_ARG_NODE"}
	}

	s.ctx.nsqlookupd.logf("DB: setting tombstone for [email protected]%s of topic(%s)", node, topicName)
	producers := s.ctx.nsqlookupd.DB.FindProducers("topic", topicName, "")
	for _, p := range producers {
		thisNode := fmt.Sprintf("%s:%d", p.peerInfo.BroadcastAddress, p.peerInfo.HTTPPort)
		if thisNode == node {
			p.Tombstone()
		}
	}

	return nil, nil
}

func (s *httpServer) doPauseTopic(w http.ResponseWriter, req *http.Request, ps httprouter.Params) (interface{}, error) {
	reqParams, err := http_api.NewReqParams(req)
	if err != nil {
		s.ctx.nsqd.logf("ERROR: failed to parse request params - %s", err)
		return nil, http_api.Err{400, "INVALID_REQUEST"}
	}

	topicName, err := reqParams.Get("topic")
	if err != nil {
		return nil, http_api.Err{400, "MISSING_ARG_TOPIC"}
	}

	topic, err := s.ctx.nsqd.GetExistingTopic(topicName)
	if err != nil {
		return nil, http_api.Err{404, "TOPIC_NOT_FOUND"}
	}

	if strings.Contains(req.URL.Path, "unpause") {
		err = topic.UnPause()
	} else {
		err = topic.Pause()
	}
	if err != nil {
		s.ctx.nsqd.logf("ERROR: failure in %s - %s", req.URL.Path, err)
		return nil, http_api.Err{500, "INTERNAL_ERROR"}
	}

	// pro-actively persist metadata so in case of process failure
	// nsqd won't suddenly (un)pause a topic
	s.ctx.nsqd.Lock()
	s.ctx.nsqd.PersistMetadata()
	s.ctx.nsqd.Unlock()
	return nil, nil
}

func (s *httpServer) doEmptyTopic(w http.ResponseWriter, req *http.Request, ps httprouter.Params) (interface{}, error) {
	reqParams, err := http_api.NewReqParams(req)
	if err != nil {
		s.ctx.nsqd.logf("ERROR: failed to parse request params - %s", err)
		return nil, http_api.Err{400, "INVALID_REQUEST"}
	}

	topicName, err := reqParams.Get("topic")
	if err != nil {
		return nil, http_api.Err{400, "MISSING_ARG_TOPIC"}
	}

	if !protocol.IsValidTopicName(topicName) {
		return nil, http_api.Err{400, "INVALID_TOPIC"}
	}

	topic, err := s.ctx.nsqd.GetExistingTopic(topicName)
	if err != nil {
		return nil, http_api.Err{404, "TOPIC_NOT_FOUND"}
	}

	err = topic.Empty()
	if err != nil {
		return nil, http_api.Err{500, "INTERNAL_ERROR"}
	}

	return nil, nil
}

func (s *httpServer) doDeleteTopic(w http.ResponseWriter, req *http.Request, ps httprouter.Params) (interface{}, error) {
	reqParams, err := http_api.NewReqParams(req)
	if err != nil {
		return nil, http_api.Err{400, "INVALID_REQUEST"}
	}

	topicName, err := reqParams.Get("topic")
	if err != nil {
		return nil, http_api.Err{400, "MISSING_ARG_TOPIC"}
	}

	registrations := s.ctx.nsqlookupd.DB.FindRegistrations("channel", topicName, "*")
	for _, registration := range registrations {
		s.ctx.nsqlookupd.logf("DB: removing channel(%s) from topic(%s)", registration.SubKey, topicName)
		s.ctx.nsqlookupd.DB.RemoveRegistration(registration)
	}

	registrations = s.ctx.nsqlookupd.DB.FindRegistrations("topic", topicName, "")
	for _, registration := range registrations {
		s.ctx.nsqlookupd.logf("DB: removing topic(%s)", topicName)
		s.ctx.nsqlookupd.DB.RemoveRegistration(registration)
	}

	return nil, nil
}

func (s *httpServer) doLookup(w http.ResponseWriter, req *http.Request, ps httprouter.Params) (interface{}, error) {
	reqParams, err := http_api.NewReqParams(req)
	if err != nil {
		return nil, http_api.Err{400, "INVALID_REQUEST"}
	}

	topicName, err := reqParams.Get("topic")
	if err != nil {
		return nil, http_api.Err{400, "MISSING_ARG_TOPIC"}
	}

	registration := s.ctx.nsqlookupd.DB.FindRegistrations("topic", topicName, "")
	if len(registration) == 0 {
		return nil, http_api.Err{404, "TOPIC_NOT_FOUND"}
	}

	channels := s.ctx.nsqlookupd.DB.FindRegistrations("channel", topicName, "*").SubKeys()
	producers := s.ctx.nsqlookupd.DB.FindProducers("topic", topicName, "")
	producers = producers.FilterByActive(s.ctx.nsqlookupd.opts.InactiveProducerTimeout,
		s.ctx.nsqlookupd.opts.TombstoneLifetime)
	return map[string]interface{}{
		"channels":  channels,
		"producers": producers.PeerInfo(),
	}, nil
}

func (s *httpServer) doStats(w http.ResponseWriter, req *http.Request, ps httprouter.Params) (interface{}, error) {
	reqParams, err := http_api.NewReqParams(req)
	if err != nil {
		s.ctx.nsqd.logf("ERROR: failed to parse request params - %s", err)
		return nil, http_api.Err{400, "INVALID_REQUEST"}
	}
	formatString, _ := reqParams.Get("format")
	topicName, _ := reqParams.Get("topic")
	channelName, _ := reqParams.Get("channel")
	jsonFormat := formatString == "json"

	stats := s.ctx.nsqd.GetStats()
	health := s.ctx.nsqd.GetHealth()
	startTime := s.ctx.nsqd.GetStartTime()
	uptime := time.Since(startTime)

	// If we WERE given a topic-name, remove stats for all the other topics:
	if len(topicName) > 0 {
		// Find the desired-topic-index:
		for _, topicStats := range stats {
			if topicStats.TopicName == topicName {
				// If we WERE given a channel-name, remove stats for all the other channels:
				if len(channelName) > 0 {
					// Find the desired-channel:
					for _, channelStats := range topicStats.Channels {
						if channelStats.ChannelName == channelName {
							topicStats.Channels = []ChannelStats{channelStats}
							// We've got the channel we were looking for:
							break
						}
					}
				}

				// We've got the topic we were looking for:
				stats = []TopicStats{topicStats}
				break
			}
		}
	}

	if !jsonFormat {
		return s.printStats(stats, health, startTime, uptime), nil
	}

	return struct {
		Version   string       `json:"version"`
		Health    string       `json:"health"`
		StartTime int64        `json:"start_time"`
		Topics    []TopicStats `json:"topics"`
	}{version.Binary, health, startTime.Unix(), stats}, nil
}

func (s *httpServer) topicsHandler(w http.ResponseWriter, req *http.Request, ps httprouter.Params) (interface{}, error) {
	var messages []string

	reqParams, err := http_api.NewReqParams(req)
	if err != nil {
		return nil, http_api.Err{400, err.Error()}
	}

	var topics []string
	if len(s.ctx.nsqadmin.getOpts().NSQLookupdHTTPAddresses) != 0 {
		topics, err = s.ci.GetLookupdTopics(s.ctx.nsqadmin.getOpts().NSQLookupdHTTPAddresses)
	} else {
		topics, err = s.ci.GetNSQDTopics(s.ctx.nsqadmin.getOpts().NSQDHTTPAddresses)
	}
	if err != nil {
		pe, ok := err.(clusterinfo.PartialErr)
		if !ok {
			s.ctx.nsqadmin.logf("ERROR: failed to get topics - %s", err)
			return nil, http_api.Err{502, fmt.Sprintf("UPSTREAM_ERROR: %s", err)}
		}
		s.ctx.nsqadmin.logf("WARNING: %s", err)
		messages = append(messages, pe.Error())
	}

	inactive, _ := reqParams.Get("inactive")
	if inactive == "true" {
		topicChannelMap := make(map[string][]string)
		if len(s.ctx.nsqadmin.getOpts().NSQLookupdHTTPAddresses) == 0 {
			goto respond
		}
		for _, topicName := range topics {
			producers, _ := s.ci.GetLookupdTopicProducers(
				topicName, s.ctx.nsqadmin.getOpts().NSQLookupdHTTPAddresses)
			if len(producers) == 0 {
				topicChannels, _ := s.ci.GetLookupdTopicChannels(
					topicName, s.ctx.nsqadmin.getOpts().NSQLookupdHTTPAddresses)
				topicChannelMap[topicName] = topicChannels
			}
		}
	respond:
		return struct {
			Topics  map[string][]string `json:"topics"`
			Message string              `json:"message"`
		}{topicChannelMap, maybeWarnMsg(messages)}, nil
	}

	return struct {
		Topics  []string `json:"topics"`
		Message string   `json:"message"`
	}{topics, maybeWarnMsg(messages)}, nil
}

func (s *httpServer) graphiteHandler(w http.ResponseWriter, req *http.Request, ps httprouter.Params) (interface{}, error) {
	reqParams, err := http_api.NewReqParams(req)
	if err != nil {
		return nil, http_api.Err{400, "INVALID_REQUEST"}
	}

	metric, err := reqParams.Get("metric")
	if err != nil || metric != "rate" {
		return nil, http_api.Err{400, "INVALID_ARG_METRIC"}
	}

	target, err := reqParams.Get("target")
	if err != nil {
		return nil, http_api.Err{400, "INVALID_ARG_TARGET"}
	}

	params := url.Values{}
	params.Set("from", fmt.Sprintf("-%dsec", s.ctx.nsqadmin.getOpts().StatsdInterval*2/time.Second))
	params.Set("until", fmt.Sprintf("-%dsec", s.ctx.nsqadmin.getOpts().StatsdInterval/time.Second))
	params.Set("format", "json")
	params.Set("target", target)
	query := fmt.Sprintf("/render?%s", params.Encode())
	url := s.ctx.nsqadmin.getOpts().GraphiteURL + query

	s.ctx.nsqadmin.logf("GRAPHITE: %s", url)

	var response []struct {
		Target     string       `json:"target"`
		DataPoints [][]*float64 `json:"datapoints"`
	}
	err = s.client.GETV1(url, &response)
	if err != nil {
		s.ctx.nsqadmin.logf("ERROR: graphite request failed - %s", err)
		return nil, http_api.Err{500, "INTERNAL_ERROR"}
	}

	var rateStr string
	rate := *response[0].DataPoints[0][0]
	if rate < 0 {
		rateStr = "N/A"
	} else {
		rateDivisor := s.ctx.nsqadmin.getOpts().StatsdInterval / time.Second
		rateStr = fmt.Sprintf("%.2f", rate/float64(rateDivisor))
	}
	return struct {
		Rate string `json:"rate"`
	}{rateStr}, nil
}

func (s *httpServer) doChannels(w http.ResponseWriter, req *http.Request, ps httprouter.Params) (interface{}, error) {
	reqParams, err := http_api.NewReqParams(req)
	if err != nil {
		return nil, http_api.Err{400, "INVALID_REQUEST"}
	}

	topicName, err := reqParams.Get("topic")
	if err != nil {
		return nil, http_api.Err{400, "MISSING_ARG_TOPIC"}
	}

	channels := s.ctx.nsqlookupd.DB.FindRegistrations("channel", topicName, "*").SubKeys()
	return map[string]interface{}{
		"channels": channels,
	}, nil
}

func (s *httpServer) doDeleteTopic(w http.ResponseWriter, req *http.Request, ps httprouter.Params) (interface{}, error) {
	reqParams, err := http_api.NewReqParams(req)
	if err != nil {
		s.ctx.nsqd.logf("ERROR: failed to parse request params - %s", err)
		return nil, http_api.Err{400, "INVALID_REQUEST"}
	}

	topicName, err := reqParams.Get("topic")
	if err != nil {
		return nil, http_api.Err{400, "MISSING_ARG_TOPIC"}
	}

	err = s.ctx.nsqd.DeleteExistingTopic(topicName)
	if err != nil {
		return nil, http_api.Err{404, "TOPIC_NOT_FOUND"}
	}

	return nil, nil
}

func (s *httpServer) getExistingTopicFromQuery(req *http.Request) (*http_api.ReqParams, *Topic, string, error) {
	reqParams, err := http_api.NewReqParams(req)
	if err != nil {
		s.ctx.nsqd.logf("ERROR: failed to parse request params - %s", err)
		return nil, nil, "", http_api.Err{400, "INVALID_REQUEST"}
	}

	topicName, channelName, err := http_api.GetTopicChannelArgs(reqParams)
	if err != nil {
		return nil, nil, "", http_api.Err{400, err.Error()}
	}

	topic, err := s.ctx.nsqd.GetExistingTopic(topicName)
	if err != nil {
		return nil, nil, "", http_api.Err{404, "TOPIC_NOT_FOUND"}
	}

	return reqParams, topic, channelName, err
}

func (s *httpServer) doCreateChannel(w http.ResponseWriter, req *http.Request, ps httprouter.Params) (interface{}, error) {
	reqParams, err := http_api.NewReqParams(req)
	if err != nil {
		return nil, http_api.Err{400, "INVALID_REQUEST"}
	}

	topicName, channelName, err := http_api.GetTopicChannelArgs(reqParams)
	if err != nil {
		return nil, http_api.Err{400, err.Error()}
	}

	s.ctx.nsqlookupd.logf("DB: adding channel(%s) in topic(%s)", channelName, topicName)
	key := Registration{"channel", topicName, channelName}
	s.ctx.nsqlookupd.DB.AddRegistration(key)

	s.ctx.nsqlookupd.logf("DB: adding topic(%s)", topicName)
	key = Registration{"topic", topicName, ""}
	s.ctx.nsqlookupd.DB.AddRegistration(key)

	return nil, nil
}

func (s *httpServer) doCreateTopic(w http.ResponseWriter, req *http.Request, ps httprouter.Params) (interface{}, error) {
	reqParams, err := http_api.NewReqParams(req)
	if err != nil {
		return nil, http_api.Err{400, "INVALID_REQUEST"}
	}

	topicName, err := reqParams.Get("topic")
	if err != nil {
		return nil, http_api.Err{400, "MISSING_ARG_TOPIC"}
	}

	if !protocol.IsValidTopicName(topicName) {
		return nil, http_api.Err{400, "INVALID_ARG_TOPIC"}
	}

	s.ctx.nsqlookupd.logf("DB: adding topic(%s)", topicName)
	key := Registration{"topic", topicName, ""}
	s.ctx.nsqlookupd.DB.AddRegistration(key)

	return nil, nil
}

func (s *httpServer) doTopics(w http.ResponseWriter, req *http.Request, ps httprouter.Params) (interface{}, error) {
	reqParams, err := http_api.NewReqParams(req)
	if err != nil {
		return nil, http_api.Err{400, err.Error()}
	}

	var topics []string
	if len(s.ctx.nsqadmin.opts.NSQLookupdHTTPAddresses) != 0 {
		topics, _ = s.ci.GetLookupdTopics(s.ctx.nsqadmin.opts.NSQLookupdHTTPAddresses)
	} else {
		topics, _ = s.ci.GetNSQDTopics(s.ctx.nsqadmin.opts.NSQDHTTPAddresses)
	}

	inactive, _ := reqParams.Get("inactive")
	if inactive == "true" {
		topicChannelMap := make(map[string][]string)
		if len(s.ctx.nsqadmin.opts.NSQLookupdHTTPAddresses) == 0 {
			goto respond
		}
		for _, topicName := range topics {
			producerList, _ := s.ci.GetLookupdTopicProducers(
				topicName, s.ctx.nsqadmin.opts.NSQLookupdHTTPAddresses)
			if len(producerList) == 0 {
				topicChannels, _ := s.ci.GetLookupdTopicChannels(
					topicName, s.ctx.nsqadmin.opts.NSQLookupdHTTPAddresses)
				topicChannelMap[topicName] = topicChannels
			}
		}
	respond:
		return struct {
			Topics map[string][]string `json:"topics"`
		}{topicChannelMap}, nil
	}

	return struct {
		Topics []string `json:"topics"`
	}{topics}, nil
}

func (s *httpServer) doDeleteChannel(w http.ResponseWriter, req *http.Request, ps httprouter.Params) (interface{}, error) {
	reqParams, err := http_api.NewReqParams(req)
	if err != nil {
		return nil, http_api.Err{400, "INVALID_REQUEST"}
	}

	topicName, channelName, err := http_api.GetTopicChannelArgs(reqParams)
	if err != nil {
		return nil, http_api.Err{400, err.Error()}
	}

	registrations := s.ctx.nsqlookupd.DB.FindRegistrations("channel", topicName, channelName)
	if len(registrations) == 0 {
		return nil, http_api.Err{404, "CHANNEL_NOT_FOUND"}
	}

	s.ctx.nsqlookupd.logf("DB: removing channel(%s) from topic(%s)", channelName, topicName)
	for _, registration := range registrations {
		s.ctx.nsqlookupd.DB.RemoveRegistration(registration)
	}

	return nil, nil
}