Initial decoding from incoming block changes.

cmd/mtwebmapper/tilesupdater.go

@@ -4,7 +4,11 @@
 
 package main
 
-import "net/http"
+import (
+	"encoding/json"
+	"log"
+	"net/http"
+)
 
 type tileUpdater struct {
 	mapDir    string
@@ -12,6 +16,11 @@ type tileUpdater struct {
 	redisPort int
 }
 
+type xz struct {
+	X int16
+	Z int16
+}
+
 func newTileUpdater(mapDir, redisHost string, redisPort int) *tileUpdater {
 	return &tileUpdater{
 		mapDir:    mapDir,
@@ -21,5 +30,14 @@ func newTileUpdater(mapDir, redisHost string, redisPort int) *tileUpdater {
 }
 
 func (tu *tileUpdater) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
-	// TODO: Implement me!
+	var err error
+	var data []xz
+	decoder := json.NewDecoder(r.Body)
+	if err = decoder.Decode(&data); err != nil {
+		log.Printf("WARN: JSON document broken: %s", err)
+		http.Error(rw, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
+		return
+	}
+	log.Printf("Changes: #%d %+v\n", len(data), data)
+	rw.WriteHeader(http.StatusOK)
 }