Add service API handler stubs for status, stop and restart (#3417)

cmd/admin-handlers.go

@@ -0,0 +1,64 @@
+/*
+ * Minio Cloud Storage, (C) 2016 Minio, Inc.
+ *
+ * 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 cmd
+
+import (
+	"encoding/json"
+	"net/http"
+)
+
+const (
+	minioAdminOpHeader = "X-Minio-Operation"
+)
+
+func (adminAPI adminAPIHandlers) ServiceStatusHandler(w http.ResponseWriter, r *http.Request) {
+	adminAPIErr := checkRequestAuthType(r, "", "", "")
+	if adminAPIErr != ErrNone {
+		writeErrorResponse(w, r, adminAPIErr, r.URL.Path)
+		return
+	}
+	storageInfo := newObjectLayerFn().StorageInfo()
+	jsonBytes, err := json.Marshal(storageInfo)
+	if err != nil {
+		writeErrorResponseNoHeader(w, r, ErrInternalError, r.URL.Path)
+		errorIf(err, "Failed to marshal storage info into json.")
+	}
+	w.WriteHeader(http.StatusOK)
+	writeSuccessResponse(w, jsonBytes)
+}
+
+func (adminAPI adminAPIHandlers) ServiceStopHandler(w http.ResponseWriter, r *http.Request) {
+	adminAPIErr := checkRequestAuthType(r, "", "", "")
+	if adminAPIErr != ErrNone {
+		writeErrorResponse(w, r, adminAPIErr, r.URL.Path)
+		return
+	}
+	// Reply to the client before stopping minio server.
+	w.WriteHeader(http.StatusOK)
+	sendServiceCmd(globalAdminPeers, serviceStop)
+}
+
+func (adminAPI adminAPIHandlers) ServiceRestartHandler(w http.ResponseWriter, r *http.Request) {
+	adminAPIErr := checkRequestAuthType(r, "", "", "")
+	if adminAPIErr != ErrNone {
+		writeErrorResponse(w, r, adminAPIErr, r.URL.Path)
+		return
+	}
+	// Reply to the client before restarting minio server.
+	w.WriteHeader(http.StatusOK)
+	sendServiceCmd(globalAdminPeers, serviceRestart)
+}