Implement UDP socket server and add package installation check utility

cmd/httpsocket/main.go

@@ -0,0 +1,36 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+	"packets/configs"
+	"packets/internal/consts"
+	"path/filepath"
+)
+
+type ConfigTOML struct {
+	Config struct {
+		DefaultHttpPort int    `toml:"httpPort"`
+		DefaultCacheDir string `toml:"cacheDir"`
+	} `toml:"Config"`
+}
+
+func main() {
+
+	cfg, err := configs.GetConfigTOML()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	pid := os.Getpid()
+	if err := os.WriteFile(filepath.Join(consts.DefaultLinux_d, "http.pid"), []byte(fmt.Sprint(pid)), 0664); err != nil {
+		fmt.Println("error saving subprocess pid", err)
+	}
+
+	fs := http.FileServer(http.Dir(cfg.Config.Cache_d))
+	http.Handle("/", fs)
+
+	log.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", cfg.Config.HttpPort), nil))
+}