Merge pull request #419 from feifeiiiiiiiiiii/feature/refactor_write_config

refactor write config

Author: pleshakov

internal/nginx/nginx.go

@@ -230,15 +230,9 @@ func (nginx *Controller) DeleteIngress(name string) {
 func (nginx *Controller) AddOrUpdateDHParam(dhparam string) (string, error) {
 	fileName := nginx.nginxSecretsPath + "/" + dhparamFilename
 	if !nginx.local {
-		pem, err := os.Create(fileName)
+		err := createFileAndWrite(fileName, []byte(dhparam))
 		if err != nil {
-			return fileName, fmt.Errorf("Couldn't create file %v: %v", fileName, err)
-		}
-		defer pem.Close()
-
-		_, err = pem.WriteString(dhparam)
-		if err != nil {
-			return fileName, fmt.Errorf("Couldn't write to pem file %v: %v", fileName, err)
+			return fileName, fmt.Errorf("Failed to write pem file: %v", err)
 		}
 	}
 	return fileName, nil
@@ -402,15 +396,10 @@ func (nginx *Controller) UpdateMainConfigFile(cfg []byte) {
 	}
 
 	if !nginx.local {
-		w, err := os.Create(filename)
-		if err != nil {
-			glog.Fatalf("Failed to open %v: %v", filename, err)
-		}
-		_, err = w.Write(cfg)
+		err := createFileAndWrite(filename, cfg)
 		if err != nil {
-			glog.Fatalf("Failed to write to %v: %v", filename, err)
+			glog.Fatalf("Failed to write NGINX conf: %v", err)
 		}
-		defer w.Close()
 	}
 	glog.V(3).Infof("The main NGINX config file has been updated")
 }
@@ -425,15 +414,10 @@ func (nginx *Controller) UpdateIngressConfigFile(name string, cfg []byte) {
 	}
 
 	if !nginx.local {
-		w, err := os.Create(filename)
+		err := createFileAndWrite(filename, cfg)
 		if err != nil {
-			glog.Fatalf("Failed to open %v: %v", filename, err)
+			glog.Fatalf("Failed to write Ingress conf: %v", err)
 		}
-		_, err = w.Write(cfg)
-		if err != nil {
-			glog.Fatalf("Failed to write to %v: %v", filename, err)
-		}
-		defer w.Close()
 	}
 	glog.V(3).Infof("The Ingress config file has been updated")
 }
@@ -454,15 +438,10 @@ func (nginx *Controller) UpdateConfigVersionFile() {
 	}
 
 	if !nginx.local {
-		w, err := os.Create(tempname)
+		err := createFileAndWrite(tempname, cfg)
 		if err != nil {
-			glog.Fatalf("Failed to open %v: %v", filename, err)
+			glog.Fatalf("Failed to write version config file: %v", err)
 		}
-		_, err = w.Write(cfg)
-		if err != nil {
-			glog.Fatalf("Failed to write to %v: %v", filename, err)
-		}
-		w.Close()
 
 		err = os.Rename(tempname, filename)
 		if err != nil {
@@ -471,3 +450,19 @@ func (nginx *Controller) UpdateConfigVersionFile() {
 	}
 	glog.V(3).Infof("The config version file has been updated.")
 }
+
+func createFileAndWrite(name string, b []byte) error {
+	w, err := os.Create(name)
+	if err != nil {
+		return fmt.Errorf("Failed to open %v: %v", name, err)
+	}
+
+	defer w.Close()
+
+	_, err = w.Write(b)
+	if err != nil {
+		return fmt.Errorf("Failed to write to %v: %v", name, err)
+	}
+
+	return nil
+}