Merge pull request #4 from tomwilkie/frank-server

Add AppenderHandler

frankenstein/server.go

@@ -0,0 +1,63 @@
+// Copyright 2016 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package frankenstein
+
+import (
+	"bytes"
+	"net/http"
+
+	"github.com/golang/protobuf/proto"
+	"github.com/prometheus/common/log"
+	"github.com/prometheus/common/model"
+
+	"github.com/prometheus/prometheus/storage"
+	"github.com/prometheus/prometheus/storage/remote/generic"
+)
+
+// AppenderHandler returns a http.Handler that accepts protobuf formatted
+// metrics and sends them to the supplied appender.
+func AppenderHandler(appender storage.SampleAppender) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		req := &generic.GenericWriteRequest{}
+		buf := bytes.Buffer{}
+		_, err := buf.ReadFrom(r.Body)
+		if err != nil {
+			log.Errorf(err.Error())
+			http.Error(w, err.Error(), http.StatusBadRequest)
+			return
+		}
+		err = proto.Unmarshal(buf.Bytes(), req)
+		if err != nil {
+			log.Errorf(err.Error())
+			http.Error(w, err.Error(), http.StatusBadRequest)
+			return
+		}
+
+		for _, ts := range req.Timeseries {
+			metric := model.Metric{}
+			for _, l := range ts.Labels {
+				metric[model.LabelName(l.GetName())] = model.LabelValue(l.GetValue())
+			}
+
+			for _, s := range ts.Samples {
+				appender.Append(&model.Sample{
+					Value:     model.SampleValue(s.GetValue()),
+					Timestamp: model.Time(s.GetTimestampMs()),
+				})
+			}
+		}
+
+		w.WriteHeader(http.StatusNoContent)
+	})
+}