src: Add DMA localagent

[barometer.git] / src / dma / cmd / server / api.go

diff --git a/src/dma/cmd/server/api.go b/src/dma/cmd/server/api.go
new file mode 100644 (file)
index 0000000..e8add0a
--- /dev/null
+++ b/src/dma/cmd/server/api.go
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2017 NEC Corporation
+ *
+ *   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 main
+
+import (
+       "context"
+       "fmt"
+       "github.com/labstack/echo"
+       "io"
+       "net/http"
+       "os"
+       "time"
+)
+
+func runAPIServer(ctx context.Context, config *Config) {
+       confDirPath := config.Server.CollectdConfDir
+       e := echo.New()
+
+       e.GET("/", func(c echo.Context) error {
+               return c.String(http.StatusOK, "GET OK")
+       })
+       e.POST("/collectd/conf", func(c echo.Context) error {
+
+               file, err := c.FormFile("file")
+               if err != nil {
+                       return c.String(http.StatusInternalServerError, "file send NG")
+               }
+
+               src, err := file.Open()
+               if err != nil {
+                       return c.String(http.StatusInternalServerError, "file open NG")
+               }
+               defer src.Close()
+
+               dst, err := os.Create(confDirPath + "/" + file.Filename)
+               if err != nil {
+                       return c.String(http.StatusInternalServerError, "file create NG")
+               }
+               defer dst.Close()
+
+               // Copy
+               if _, err = io.Copy(dst, src); err != nil {
+                       return c.String(http.StatusInternalServerError, "file write NG")
+               }
+
+               err = createCollectdConf()
+               if err != nil {
+                       errstr := fmt.Sprintf("collectd conf NG:%v", err)
+                       return c.String(http.StatusInternalServerError, errstr)
+               }
+               return c.String(http.StatusCreated, "collectd conf OK")
+       })
+
+       // Start server
+       go func() {
+               urlStr := ":" + config.Server.ListenPort
+               if err := e.Start(urlStr); err != nil {
+                       e.Logger.Info("shutting down the server")
+               }
+       }()
+
+       // Wait for context.Done() to gracefully shutdown the server with
+       // a timeout of 10 seconds.
+       <-ctx.Done()
+       ctxShutdown, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+       defer cancel()
+       if err := e.Shutdown(ctxShutdown); err != nil {
+               e.Logger.Fatal(err)
+       }
+
+}