many many things

httpsubscriber/httpsubscriber.go

@@ -0,0 +1,54 @@
+package httpsubscriber
+
+import (
+	"encoding/json"
+	"errors"
+	"log"
+	"net/http"
+	"time"
+
+	"github.com/didiercrunch/doorman/shared"
+	"gopkg.in/mgo.v2/bson"
+)
+
+type HttpSubscriber struct {
+	Url      string
+	HartBeat time.Duration
+}
+
+func (s *HttpSubscriber) GetDoormanUpdater() (*shared.DoormanUpdater, error) {
+	resp, err := http.Get(s.Url)
+	if err != nil {
+		return nil, err
+	} else if resp.StatusCode != 200 {
+		return nil, errors.New("bad http status when GETting update, " + resp.Status)
+	}
+	defer resp.Body.Close()
+	de := json.NewDecoder(resp.Body)
+	ret := new(shared.DoormanUpdater)
+	err = de.Decode(ret)
+	return ret, err
+}
+
+func (s *HttpSubscriber) callUpdateHandlerFunction(f shared.UpdateHandlerFunc, data []byte) error {
+	wu := &shared.DoormanUpdater{}
+	if err := json.Unmarshal(data, wu); err != nil {
+		return err
+	} else {
+		return f(wu)
+	}
+}
+
+func (s *HttpSubscriber) Subscribe(abtestId bson.ObjectId, update shared.UpdateHandlerFunc) error {
+	go func() {
+		c := time.Tick(s.HartBeat)
+		for _ = range c {
+			if du, err := s.GetDoormanUpdater(); err != nil {
+				log.Printf("error retrieving doorman %v \n%v\n", abtestId, err)
+			} else {
+				update(du)
+			}
+		}
+	}()
+	return nil
+}