Golang GlobResponse.Matches方法代码示例

func findHandler(w http.ResponseWriter, req *http.Request) {

	logger.Debugln("request: ", req.URL.RequestURI())

	Metrics.FindRequests.Add(1)

	rewrite, _ := url.ParseRequestURI(req.URL.RequestURI())
	v := rewrite.Query()
	format := req.FormValue("format")
	v.Set("format", "protobuf")
	rewrite.RawQuery = v.Encode()

	query := req.FormValue("query")
	var tld string
	if i := strings.IndexByte(query, '.'); i > 0 {
		tld = query[:i]
	}
	// lookup tld in our map of where they live to reduce the set of
	// servers we bug with our find
	Config.mu.RLock()
	var backends []string
	var ok bool
	if backends, ok = Config.metricPaths[tld]; !ok || backends == nil || len(backends) == 0 {
		backends = Config.Backends
	}
	Config.mu.RUnlock()

	responses := multiGet(backends, rewrite.RequestURI())

	if responses == nil || len(responses) == 0 {
		logger.Logln("find: error querying backends for: ", rewrite.RequestURI())
		http.Error(w, "find: error querying backends", http.StatusInternalServerError)
		return
	}

	metrics, paths := findHandlerPB(w, req, responses)

	// update our cache of which servers have which metrics
	Config.mu.Lock()
	for k, v := range paths {
		Config.metricPaths[k] = v
	}
	Config.mu.Unlock()

	switch format {
	case "protobuf":
		w.Header().Set("Content-Type", "application/protobuf")
		var result pb.GlobResponse
		query := req.FormValue("query")
		result.Name = &query
		result.Matches = metrics
		b, _ := proto.Marshal(&result)
		w.Write(b)
	case "json":
		w.Header().Set("Content-Type", "application/json")
		jEnc := json.NewEncoder(w)
		jEnc.Encode(metrics)
	case "", "pickle":
		w.Header().Set("Content-Type", "application/pickle")

		var result []map[string]interface{}

		for _, metric := range metrics {
			mm := map[string]interface{}{
				"metric_path": *metric.Path,
				"isLeaf":      *metric.IsLeaf,
			}
			result = append(result, mm)
		}

		pEnc := pickle.NewEncoder(w)
		pEnc.Encode(result)
	}
}

func findHandler(wr http.ResponseWriter, req *http.Request) {
	// URL: /metrics/find/?local=1&format=pickle&query=the.metric.path.with.glob

	t0 := time.Now()

	Metrics.FindRequests.Add(1)

	req.ParseForm()
	format := req.FormValue("format")
	query := req.FormValue("query")

	if format != "json" && format != "pickle" && format != "protobuf" {
		Metrics.FindErrors.Add(1)
		logger.Logf("dropping invalid uri (format=%s): %s",
			format, req.URL.RequestURI())
		http.Error(wr, "Bad request (unsupported format)",
			http.StatusBadRequest)
		return
	}

	if query == "" {
		Metrics.FindErrors.Add(1)
		logger.Logf("dropping invalid request (query=): %s", req.URL.RequestURI())
		http.Error(wr, "Bad request (no query)", http.StatusBadRequest)
		return
	}

	files, leafs := expandGlobs(query)

	if format == "json" || format == "protobuf" {
		name := req.FormValue("query")
		response := pb.GlobResponse{
			Name:    &name,
			Matches: make([]*pb.GlobMatch, 0),
		}

		for i, p := range files {
			response.Matches = append(response.Matches, &pb.GlobMatch{Path: proto.String(p), IsLeaf: proto.Bool(leafs[i])})
		}

		var b []byte
		var err error
		switch format {
		case "json":
			b, err = json.Marshal(response)
		case "protobuf":
			b, err = proto.Marshal(&response)
		}
		if err != nil {
			Metrics.FindErrors.Add(1)
			logger.Logf("failed to create %s data for glob %s: %s",
				format, *response.Name, err)
			return
		}
		wr.Write(b)
	} else if format == "pickle" {
		// [{'metric_path': 'metric', 'intervals': [(x,y)], 'isLeaf': True},]
		var metrics []map[string]interface{}
		var m map[string]interface{}

		for i, p := range files {
			m = make(map[string]interface{})
			m["metric_path"] = p
			// m["intervals"] = dunno how to do a tuple here
			m["isLeaf"] = leafs[i]
			metrics = append(metrics, m)
		}

		wr.Header().Set("Content-Type", "application/pickle")
		pEnc := pickle.NewEncoder(wr)
		pEnc.Encode(metrics)
	}

	if len(files) == 0 {
		// to get an idea how often we search for nothing
		Metrics.FindZero.Add(1)
	}

	logger.Debugf("find: %d hits for %s in %v", len(files), req.FormValue("query"), time.Since(t0))
	return
}