Implemented worker command

http/uuids_worker.go

@@ -0,0 +1,89 @@
+package http
+
+import (
+	"encoding/json"
+	"fmt"
+	"net"
+	"net/http"
+	"time"
+
+	"github.com/gorilla/mux"
+	"github.com/mono83/slf/wd"
+
+	"github.com/elyby/chrly/api/mojang"
+	"github.com/elyby/chrly/mojangtextures"
+)
+
+type UuidsProvider interface {
+	GetUuid(username string) (*mojang.ProfileInfo, error)
+}
+
+type UUIDsWorker struct {
+	ListenSpec string
+
+	UUIDsProvider mojangtextures.UUIDsProvider
+	Logger        wd.Watchdog
+}
+
+func (ctx *UUIDsWorker) Run() error {
+	ctx.Logger.Info(fmt.Sprintf("Starting, HTTP on: %s\n", ctx.ListenSpec))
+
+	listener, err := net.Listen("tcp", ctx.ListenSpec)
+	if err != nil {
+		return err
+	}
+
+	server := &http.Server{
+		ReadTimeout:    60 * time.Second,
+		WriteTimeout:   60 * time.Second, // TODO: should I adjust this values?
+		MaxHeaderBytes: 1 << 16,
+		Handler:        ctx.CreateHandler(),
+	}
+
+	// noinspection GoUnhandledErrorResult
+	go server.Serve(listener)
+
+	s := waitForSignal()
+	ctx.Logger.Info(fmt.Sprintf("Got signal: %v, exiting.", s))
+
+	return nil
+}
+
+func (ctx *UUIDsWorker) CreateHandler() http.Handler {
+	router := mux.NewRouter().StrictSlash(true)
+	router.NotFoundHandler = http.HandlerFunc(NotFound)
+
+	router.Handle("/api/worker/mojang-uuid/{username}", http.HandlerFunc(ctx.GetUUID)).Methods("GET")
+
+	return router
+}
+
+func (ctx *UUIDsWorker) GetUUID(response http.ResponseWriter, request *http.Request) {
+	username := parseUsername(mux.Vars(request)["username"])
+	profile, err := ctx.UUIDsProvider.GetUuid(username)
+	if err != nil {
+		if _, ok := err.(*mojang.TooManyRequestsError); ok {
+			ctx.Logger.Warning("Got 429 Too Many Requests")
+			response.WriteHeader(http.StatusTooManyRequests)
+			return
+		}
+
+		ctx.Logger.Warning("Got non success response: :err", wd.ErrParam(err))
+		response.Header().Set("Content-Type", "application/json")
+		response.WriteHeader(http.StatusInternalServerError)
+		result, _ := json.Marshal(map[string]interface{}{
+			"provider": err.Error(),
+		})
+		_, _ = response.Write(result)
+		return
+	}
+
+	if profile == nil {
+		response.WriteHeader(http.StatusNoContent)
+		return
+	}
+
+	response.Header().Set("Content-Type", "application/json")
+	responseData, _ := json.Marshal(profile)
+	_, _ = response.Write(responseData)
+}