Configure xApp metrics in xApp description

[ric-plt/vespamgr.git] / cmd / vesmgr / httpserver.go

diff --git a/cmd/vesmgr/httpserver.go b/cmd/vesmgr/httpserver.go
new file mode 100644 (file)
index 0000000..585319e
--- /dev/null
+++ b/cmd/vesmgr/httpserver.go
@@ -0,0 +1,78 @@
+/*
+ *  Copyright (c) 2019 AT&T Intellectual Property.
+ *  Copyright (c) 2018-2019 Nokia.
+ *
+ *  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 (
+       "fmt"
+       "io/ioutil"
+       "net"
+       "net/http"
+)
+
+const SupervisionUrl = "/supervision/"
+
+func startHttpServer(listener net.Listener, xappnotifUrl string, notif_ch chan []byte, supervision_ch chan chan string) {
+       go runHttpServer(listener, xappnotifUrl, notif_ch, supervision_ch)
+}
+
+func runHttpServer(listener net.Listener, xappNotifUrl string, notif_ch chan []byte, supervision_ch chan chan string) {
+
+       logger.Info("vesmgr http server serving at %s", listener.Addr())
+
+       http.HandleFunc(xappNotifUrl, func(w http.ResponseWriter, r *http.Request) {
+
+               switch r.Method {
+               case "POST":
+                       logger.Info("httpServer: POST in %s", xappNotifUrl)
+                       body, err := ioutil.ReadAll(r.Body)
+                       defer r.Body.Close()
+                       if err != nil {
+                               logger.Error("httpServer: Invalid body in POST request")
+                               return
+                       }
+                       notif_ch <- body
+                       return
+               default:
+                       logger.Error("httpServer: Invalid method %s to %s", r.Method, r.URL.Path)
+                       http.Error(w, "405 method not allowed", http.StatusMethodNotAllowed)
+                       return
+               }
+       })
+
+       http.HandleFunc(SupervisionUrl, func(w http.ResponseWriter, r *http.Request) {
+
+               switch r.Method {
+               case "GET":
+                       logger.Info("httpServer: GET supervision")
+                       supervision_ack_ch := make(chan string)
+                       // send supervision to the main loop
+                       supervision_ch <- supervision_ack_ch
+                       reply := <-supervision_ack_ch
+                       logger.Info("httpServer: supervision ack from the main loop: %s", reply)
+                       fmt.Fprintf(w, reply)
+                       return
+               default:
+                       logger.Error("httpServer: invalid method %s to %s", r.Method, r.URL.Path)
+                       http.Error(w, "405 method not allowed", http.StatusMethodNotAllowed)
+                       return
+               }
+
+       })
+
+       http.Serve(listener, nil)
+}