more optimizations

api/settings_file.go

@@ -0,0 +1,45 @@
+package api
+
+import (
+	"dns_service/utils"
+	"io"
+	"net/http"
+	"os"
+)
+
+func SettingsFile(w http.ResponseWriter, req *http.Request) {
+	configPath := os.Getenv("DNSMASQ_CONFIG")
+	if configPath == "" {
+		http.Error(w, "DNSMASQ_CONFIG environment variable not set", http.StatusInternalServerError)
+		return
+	}
+
+	switch req.Method {
+	case "GET":
+		data, err := os.ReadFile(configPath)
+		if err != nil {
+			http.Error(w, "failed to read dnsmasq config file", http.StatusInternalServerError)
+			return
+		}
+		w.Header().Set("Content-Type", "text/plain")
+		w.Write(data)
+	case "POST":
+		bodyBytes, err := io.ReadAll(req.Body)
+		if err != nil {
+			http.Error(w, "failed to read request body", http.StatusBadRequest)
+			return
+		}
+		if err := os.WriteFile(configPath, bodyBytes, 0644); err != nil {
+			http.Error(w, "failed to write dnsmasq config file", http.StatusInternalServerError)
+			return
+		}
+		if err := utils.RestartDnsmasq(); err != nil {
+			http.Error(w, "failed to restart dnsmasq", http.StatusInternalServerError)
+			return
+		}
+		w.Header().Set("Content-Type", "text/plain")
+		w.Write(bodyBytes)
+	default:
+		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+	}
+}