improve responses

server/handler/vmModifyEvent.go

@@ -29,31 +29,42 @@ func (h *Handler) VmModifyEvent(w http.ResponseWriter, r *http.Request) {
 
 	reqBody, err := io.ReadAll(r.Body)
 	if err != nil {
-		h.Logger.Error("Invalid data received", "error", err)
-		fmt.Fprintf(w, "Invalid data received")
+		h.Logger.Error("Invalid data received", "length", len(reqBody), "error", err)
+		w.Header().Set("Content-Type", "application/json")
 		w.WriteHeader(http.StatusInternalServerError)
+		json.NewEncoder(w).Encode(map[string]string{
+			"status":  "ERROR",
+			"message": fmt.Sprintf("Invalid data received: '%s'", err),
+		})
 		return
-	} else {
-		h.Logger.Debug("received input data", "length", len(reqBody))
 	}
 
 	// Decode the JSON body into CloudEventReceived struct
 	var event models.CloudEventReceived
 	if err := json.Unmarshal(reqBody, &event); err != nil {
-		h.Logger.Error("unable to decode json", "error", err)
-		prettyPrint(reqBody)
-		http.Error(w, "Invalid JSON body", http.StatusBadRequest)
+		h.Logger.Error("Unable to decode json request body", "length", len(reqBody), "error", err)
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusInternalServerError)
+		json.NewEncoder(w).Encode(map[string]string{
+			"status":  "ERROR",
+			"message": fmt.Sprintf("Unable to decode json request body: '%s'", err),
+		})
 		return
 	} else {
-		h.Logger.Debug("successfully decoded JSON")
+		//h.Logger.Debug("successfully decoded JSON")
 		//prettyPrint(event)
 	}
 
 	if event.CloudEvent.Data.ConfigChanges == nil {
 		h.Logger.Warn("Received event contains no config change")
 		prettyPrint(event)
+		w.Header().Set("Content-Type", "application/json")
 		w.WriteHeader(http.StatusAccepted)
-		fmt.Fprintf(w, "Processed update event but no config changes were found\n")
+		json.NewEncoder(w).Encode(map[string]string{
+			"status":  "OK",
+			"message": fmt.Sprintf("Received update event successfully but no config changes were found"),
+		})
+		return
 	} else {
 		h.Logger.Debug("Received event contains config change info", "source", event.CloudEvent.Source,
 			"id", event.CloudEvent.ID,
@@ -128,10 +139,6 @@ func (h *Handler) VmModifyEvent(w http.ResponseWriter, r *http.Request) {
 						}
 					}
 				}
-
-				// TODO - recalculate total disk size
-				//h.Logger.Debug("Detected config change for VM disk")
-
 			}
 		}
 
@@ -179,7 +186,10 @@ func (h *Handler) VmModifyEvent(w http.ResponseWriter, r *http.Request) {
 			} else {
 				h.Logger.Debug("created database record", "insert_result", result)
 				w.WriteHeader(http.StatusOK)
-				fmt.Fprintf(w, "Processed update event: %v\n", result)
+				json.NewEncoder(w).Encode(map[string]string{
+					"status":  "OK",
+					"message": fmt.Sprintf("Successfully processed vm modify event"),
+				})
 				return
 			}
 		} else {