diff --git a/.gitignore b/.gitignore
index e54c74e..e28f240 100644
--- a/.gitignore
+++ b/.gitignore
@@ -39,3 +39,4 @@ go.work.sum
 # env file
 .env
 
+agent.md
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..2b96ea1
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "markdown.validate.enabled": true
+}
\ No newline at end of file
diff --git a/auth.go b/auth.go
new file mode 100644
index 0000000..8b04fde
--- /dev/null
+++ b/auth.go
@@ -0,0 +1,170 @@
+package main
+
+import (
+	"crypto/rand"
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"strings"
+	"sync"
+	"time"
+)
+
+type TokenInfo struct {
+	Token     string
+	CreatedAt time.Time
+	UserID    int
+}
+
+var (
+	tokenMap  = make(map[int]*TokenInfo)
+	tokenMux  sync.RWMutex
+	tokenTTL  = time.Hour
+)
+
+func GenerateToken(userID int) (string, error) {
+	randomBytes := make([]byte, 32)
+	_, err := rand.Read(randomBytes)
+	if err != nil {
+		return "", fmt.Errorf("failed to generate random bytes: %w", err)
+	}
+
+	hash := sha256.Sum256(append(randomBytes, []byte(fmt.Sprintf("%d", userID))...))
+	token := base64.URLEncoding.EncodeToString(hash[:])
+
+	tokenMux.Lock()
+	defer tokenMux.Unlock()
+
+	tokenMap[userID] = &TokenInfo{
+		Token:     token,
+		CreatedAt: time.Now(),
+		UserID:    userID,
+	}
+
+	return token, nil
+}
+
+func ValidateToken(userID int, token string) error {
+	tokenMux.RLock()
+	defer tokenMux.RUnlock()
+
+	tokenInfo, exists := tokenMap[userID]
+	if !exists {
+		return errors.New("token not found")
+	}
+
+	if tokenInfo.Token != token {
+		return errors.New("invalid token")
+	}
+
+	if time.Since(tokenInfo.CreatedAt) > tokenTTL {
+		return errors.New("token expired")
+	}
+
+	return nil
+}
+
+func RefreshToken(userID int) (string, error) {
+	tokenMux.Lock()
+	defer tokenMux.Unlock()
+
+	randomBytes := make([]byte, 32)
+	_, err := rand.Read(randomBytes)
+	if err != nil {
+		return "", fmt.Errorf("failed to generate random bytes: %w", err)
+	}
+
+	hash := sha256.Sum256(append(randomBytes, []byte(fmt.Sprintf("%d", userID))...))
+	token := base64.URLEncoding.EncodeToString(hash[:])
+
+	tokenMap[userID] = &TokenInfo{
+		Token:     token,
+		CreatedAt: time.Now(),
+		UserID:    userID,
+	}
+
+	return token, nil
+}
+
+func RemoveToken(userID int) {
+	tokenMux.Lock()
+	defer tokenMux.Unlock()
+	delete(tokenMap, userID)
+}
+
+func GetTokenInfo(userID int) (*TokenInfo, error) {
+	tokenMux.RLock()
+	defer tokenMux.RUnlock()
+
+	tokenInfo, exists := tokenMap[userID]
+	if !exists {
+		return nil, errors.New("token not found")
+	}
+
+	return tokenInfo, nil
+}
+
+func extractUserIDFromToken(token string) (int, error) {
+	tokenMux.RLock()
+	defer tokenMux.RUnlock()
+	for userID, tokenInfo := range tokenMap {
+		if tokenInfo.Token == token {
+			return userID, nil
+		}
+	}
+	return 0, errors.New("invalid token")
+}
+
+func CleanupExpiredTokens() {
+	tokenMux.Lock()
+	defer tokenMux.Unlock()
+
+	for userID, tokenInfo := range tokenMap {
+		if time.Since(tokenInfo.CreatedAt) > tokenTTL {
+			delete(tokenMap, userID)
+		}
+	}
+}
+
+func hashPassword(password string) (string, error) {
+	hash := sha256.Sum256([]byte(password))
+	return hex.EncodeToString(hash[:]), nil
+}
+
+func verifyPassword(password, hashedPassword string) bool {
+	hash, err := hashPassword(password)
+	if err != nil {
+		return false
+	}
+	return hash == hashedPassword
+}
+
+func isValidPassword(password string) bool {
+	if len(password) < 8 {
+		return false
+	}
+
+	hasUpper := false
+	hasLower := false
+	hasDigit := false
+	hasSpecial := false
+
+	specialChars := "!@#$%^&*()_+-=[]{}|;:,.<>?"
+
+	for _, char := range password {
+		switch {
+		case char >= 'A' && char <= 'Z':
+			hasUpper = true
+		case char >= 'a' && char <= 'z':
+			hasLower = true
+		case char >= '0' && char <= '9':
+			hasDigit = true
+		case strings.ContainsRune(specialChars, char):
+			hasSpecial = true
+		}
+	}
+
+	return hasUpper && hasLower && hasDigit && hasSpecial
+}
diff --git a/config.go b/config.go
new file mode 100644
index 0000000..d83af94
--- /dev/null
+++ b/config.go
@@ -0,0 +1,74 @@
+package main
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+)
+
+type Config struct {
+	ListenAddr   string `json:"listenAddr"`
+	ListenPort   string `json:"listenPort"`
+	FrpcPath     string `json:"frpcPath"`
+	InstancePath string `json:"instancePath"`
+	Debug        bool   `json:"debug"`
+}
+
+var globalConfig *Config
+
+func LoadConfig(configPath string) (*Config, error) {
+	data, err := os.ReadFile(configPath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read config file: %w", err)
+	}
+
+	var config Config
+	if err := json.Unmarshal(data, &config); err != nil {
+		return nil, fmt.Errorf("failed to parse config file: %w", err)
+	}
+
+	if config.ListenAddr == "" {
+		config.ListenAddr = "0.0.0.0"
+	}
+
+	if config.ListenPort == "" {
+		config.ListenPort = "8080"
+	}
+
+	if config.FrpcPath == "" {
+		config.FrpcPath = "/usr/bin/frpc"
+	}
+
+	if config.InstancePath == "" {
+		config.InstancePath = "./configs"
+	}
+
+	if err := os.MkdirAll(config.InstancePath, 0755); err != nil {
+		return nil, fmt.Errorf("failed to create config directory: %w", err)
+	}
+
+	globalConfig = &config
+	return &config, nil
+}
+
+func GetConfig() (*Config, error) {
+	if globalConfig == nil {
+		return nil, errors.New("config not loaded")
+	}
+	return globalConfig, nil
+}
+
+func SaveConfig(configPath string, config *Config) error {
+	data, err := json.MarshalIndent(config, "", "  ")
+	if err != nil {
+		return fmt.Errorf("failed to marshal config: %w", err)
+	}
+
+	if err := os.WriteFile(configPath, data, 0644); err != nil {
+		return fmt.Errorf("failed to write config file: %w", err)
+	}
+
+	globalConfig = config
+	return nil
+}
diff --git a/config.json b/config.json
new file mode 100644
index 0000000..7ed520d
--- /dev/null
+++ b/config.json
@@ -0,0 +1,7 @@
+{
+  "listenAddr": "0.0.0.0",
+  "listenPort": "8080",
+  "frpcPath": "/usr/bin/frpc",
+  "instancePath": "./configs",
+  "debug": false
+}
diff --git a/database.db b/database.db
new file mode 100644
index 0000000..1e1667d
Binary files /dev/null and b/database.db differ
diff --git a/database.go b/database.go
new file mode 100644
index 0000000..87db93a
--- /dev/null
+++ b/database.go
@@ -0,0 +1,246 @@
+package main
+
+import (
+	"database/sql"
+	"errors"
+	"fmt"
+	"strings"
+
+	_ "modernc.org/sqlite"
+)
+
+var db *sql.DB
+
+type User struct {
+	UserID   int
+	Username string
+	Passwd   string
+	Type     string
+}
+
+func InitDatabase(dbPath string) error {
+	var err error
+	db, err = sql.Open("sqlite", dbPath)
+	if err != nil {
+		return fmt.Errorf("failed to open database: %w", err)
+	}
+
+	if err = db.Ping(); err != nil {
+		return fmt.Errorf("failed to ping database: %w", err)
+	}
+
+	createTableSQL := `
+	CREATE TABLE IF NOT EXISTS userLogin (
+		userID INTEGER PRIMARY KEY AUTOINCREMENT,
+		username TEXT UNIQUE NOT NULL,
+		passwd TEXT NOT NULL,
+		type TEXT NOT NULL DEFAULT 'visitor'
+	);
+	`
+	_, err = db.Exec(createTableSQL)
+	if err != nil {
+		return fmt.Errorf("failed to create table: %w", err)
+	}
+
+	return nil
+}
+
+func CloseDatabase() error {
+	if db != nil {
+		return db.Close()
+	}
+	return nil
+}
+
+func isValidInput(input string) bool {
+	invalidChars := []string{"'", "\"", ";", "--", "/*", "*/", "xp_", "sp_", "EXEC", "EXECUTE", "DROP", "INSERT", "UPDATE", "DELETE", "SELECT"}
+	lowerInput := strings.ToLower(input)
+	for _, chars := range invalidChars {
+		if strings.Contains(lowerInput, chars) {
+			return false
+		}
+	}
+	return true
+}
+
+func AddUser(username, passwd, userType string) (int, error) {
+	if !isValidInput(username) || !isValidInput(passwd) {
+		return 0, errors.New("invalid input: contains illegal characters")
+	}
+
+	if !isValidPassword(passwd) {
+		return 0, errors.New("password does not meet complexity requirements")
+	}
+
+	hashedPasswd, err := hashPassword(passwd)
+	if err != nil {
+		return 0, fmt.Errorf("failed to hash password: %w", err)
+	}
+
+	result, err := db.Exec("INSERT INTO userLogin (username, passwd, type) VALUES (?, ?, ?)",
+		username, hashedPasswd, userType)
+	if err != nil {
+		if strings.Contains(err.Error(), "UNIQUE constraint failed") {
+			return 0, errors.New("username already exists")
+		}
+		return 0, fmt.Errorf("failed to insert user: %w", err)
+	}
+
+	lastID, err := result.LastInsertId()
+	if err != nil {
+		return 0, fmt.Errorf("failed to get last insert id: %w", err)
+	}
+
+	var count int
+	err = db.QueryRow("SELECT COUNT(*) FROM userLogin WHERE userID = ?", lastID).Scan(&count)
+	if err != nil {
+		return 0, fmt.Errorf("failed to verify user insertion: %w", err)
+	}
+
+	if count == 0 {
+		return 0, errors.New("user insertion verification failed")
+	}
+
+	return int(lastID), nil
+}
+
+func GetUserByUsername(username string) (*User, error) {
+	if !isValidInput(username) {
+		return nil, errors.New("invalid input: contains illegal characters")
+	}
+
+	var user User
+	err := db.QueryRow("SELECT userID, username, passwd, type FROM userLogin WHERE username = ?", username).
+		Scan(&user.UserID, &user.Username, &user.Passwd, &user.Type)
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return nil, errors.New("user not found")
+		}
+		return nil, fmt.Errorf("failed to query user: %w", err)
+	}
+
+	return &user, nil
+}
+
+func GetUserByID(userID int) (*User, error) {
+	var user User
+	err := db.QueryRow("SELECT userID, username, passwd, type FROM userLogin WHERE userID = ?", userID).
+		Scan(&user.UserID, &user.Username, &user.Passwd, &user.Type)
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return nil, errors.New("user not found")
+		}
+		return nil, fmt.Errorf("failed to query user: %w", err)
+	}
+
+	return &user, nil
+}
+
+func UpdateUserPassword(userID int, newPasswd string) error {
+	if !isValidInput(newPasswd) {
+		return errors.New("invalid input: contains illegal characters")
+	}
+
+	if !isValidPassword(newPasswd) {
+		return errors.New("password does not meet complexity requirements")
+	}
+
+	hashedPasswd, err := hashPassword(newPasswd)
+	if err != nil {
+		return fmt.Errorf("failed to hash password: %w", err)
+	}
+
+	result, err := db.Exec("UPDATE userLogin SET passwd = ? WHERE userID = ?", hashedPasswd, userID)
+	if err != nil {
+		return fmt.Errorf("failed to update password: %w", err)
+	}
+
+	rowsAffected, err := result.RowsAffected()
+	if err != nil {
+		return fmt.Errorf("failed to get rows affected: %w", err)
+	}
+
+	if rowsAffected == 0 {
+		return errors.New("user not found")
+	}
+
+	return nil
+}
+
+func UpdateUserType(userID int, newType string) error {
+	validTypes := map[string]bool{
+		"superuser": true,
+		"admin":     true,
+		"visitor":   true,
+	}
+
+	if !validTypes[newType] {
+		return errors.New("invalid user type")
+	}
+
+	result, err := db.Exec("UPDATE userLogin SET type = ? WHERE userID = ?", newType, userID)
+	if err != nil {
+		return fmt.Errorf("failed to update user type: %w", err)
+	}
+
+	rowsAffected, err := result.RowsAffected()
+	if err != nil {
+		return fmt.Errorf("failed to get rows affected: %w", err)
+	}
+
+	if rowsAffected == 0 {
+		return errors.New("user not found")
+	}
+
+	return nil
+}
+
+func DeleteUser(userID int) error {
+	result, err := db.Exec("DELETE FROM userLogin WHERE userID = ?", userID)
+	if err != nil {
+		return fmt.Errorf("failed to delete user: %w", err)
+	}
+
+	rowsAffected, err := result.RowsAffected()
+	if err != nil {
+		return fmt.Errorf("failed to get rows affected: %w", err)
+	}
+
+	if rowsAffected == 0 {
+		return errors.New("user not found")
+	}
+
+	return nil
+}
+
+func GetNextAvailableUserID() (int, error) {
+	var maxID int
+	err := db.QueryRow("SELECT COALESCE(MAX(userID), 0) FROM userLogin").Scan(&maxID)
+	if err != nil {
+		return 0, fmt.Errorf("failed to get max userID: %w", err)
+	}
+	return maxID + 1, nil
+}
+
+func GetAllUsers() ([]User, error) {
+	rows, err := db.Query("SELECT userID, username, type FROM userLogin")
+	if err != nil {
+		return nil, fmt.Errorf("failed to query users: %w", err)
+	}
+	defer rows.Close()
+
+	var users []User
+	for rows.Next() {
+		var user User
+		if err := rows.Scan(&user.UserID, &user.Username, &user.Type); err != nil {
+			return nil, fmt.Errorf("failed to scan user: %w", err)
+		}
+		users = append(users, user)
+	}
+
+	if err = rows.Err(); err != nil {
+		return nil, fmt.Errorf("rows error: %w", err)
+	}
+
+	return users, nil
+}
diff --git a/frpc.go b/frpc.go
new file mode 100644
index 0000000..008894b
--- /dev/null
+++ b/frpc.go
@@ -0,0 +1,733 @@
+package main
+
+import (
+	"database/sql"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+type InstanceInfo struct {
+	Name        string                 `json:"name"`
+	ServerAddr  string                 `json:"serverAddr"`
+	ServerPort  string                 `json:"serverPort"`
+	AuthMethod  string                 `json:"auth_method"`
+	BootAtStart bool                   `json:"bootAtStart"`
+	RunUser     string                 `json:"runUser"`
+	Additional  map[string]interface{} `json:"additionalProperties"`
+}
+
+type CreateInstanceRequest struct {
+	Token        string                 `json:"token"`
+	TimeStamp    int64                  `json:"timeStamp"`
+	InstanceInfo InstanceInfo           `json:"instanceInfo"`
+	BootAtStart  bool                   `json:"bootAtStart"`
+	RunUser      string                 `json:"runUser"`
+	Additional   map[string]interface{} `json:"additionalProperties"`
+}
+
+type FrpcInstance struct {
+	ID          int
+	UserID      int
+	Name        string
+	ServerAddr  string
+	ServerPort  string
+	AuthMethod  string
+	BootAtStart bool
+	RunUser     string
+	ConfigPath  string
+	CreatedAt   time.Time
+}
+
+var frpcDB *sql.DB
+
+func InitFrpcDatabase(dbPath string) error {
+	var err error
+	frpcDB, err = sql.Open("sqlite", dbPath)
+	if err != nil {
+		return fmt.Errorf("failed to open frpc database: %w", err)
+	}
+
+	if err = frpcDB.Ping(); err != nil {
+		return fmt.Errorf("failed to ping frpc database: %w", err)
+	}
+
+	createTableSQL := `
+	CREATE TABLE IF NOT EXISTS frpcInstances (
+		id INTEGER PRIMARY KEY AUTOINCREMENT,
+		userID INTEGER NOT NULL,
+		name TEXT NOT NULL,
+		serverAddr TEXT NOT NULL,
+		serverPort TEXT NOT NULL,
+		auth_method TEXT NOT NULL,
+		bootAtStart INTEGER NOT NULL DEFAULT 0,
+		runUser TEXT NOT NULL DEFAULT 'root',
+		configPath TEXT NOT NULL,
+		createdAt TEXT NOT NULL,
+		UNIQUE(userID, name)
+	);
+	`
+	_, err = frpcDB.Exec(createTableSQL)
+	if err != nil {
+		return fmt.Errorf("failed to create frpcInstances table: %w", err)
+	}
+
+	return nil
+}
+
+func CloseFrpcDatabase() error {
+	if frpcDB != nil {
+		return frpcDB.Close()
+	}
+	return nil
+}
+
+func CreateInstanceHandler(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		SendErrorResponse(w, http.StatusMethodNotAllowed, "invalid request method")
+		return
+	}
+
+	body, err := io.ReadAll(r.Body)
+	if err != nil {
+		SendErrorResponse(w, http.StatusBadRequest, "failed to read request body")
+		return
+	}
+	defer r.Body.Close()
+
+	var req CreateInstanceRequest
+	if err := json.Unmarshal(body, &req); err != nil {
+		SendErrorResponse(w, http.StatusBadRequest, "invalid request format")
+		return
+	}
+
+	userID, _, err := ValidateRequest(w, r)
+	if err != nil {
+		SendErrorResponse(w, http.StatusUnauthorized, err.Error())
+		return
+	}
+
+	if err := CheckPermission(userID, "superuser", "admin"); err != nil {
+		SendErrorResponse(w, http.StatusForbidden, err.Error())
+		return
+	}
+
+	if req.InstanceInfo.Name == "" || req.InstanceInfo.ServerAddr == "" ||
+		req.InstanceInfo.ServerPort == "" || req.InstanceInfo.AuthMethod == "" {
+		SendErrorResponse(w, http.StatusBadRequest, "missing required fields in instanceInfo")
+		return
+	}
+
+	runUser := req.RunUser
+	if runUser == "" {
+		runUser = "root"
+	}
+
+	user, err := GetUserByID(userID)
+	if err != nil {
+		SendErrorResponse(w, http.StatusInternalServerError, "failed to get user info")
+		return
+	}
+
+	configDir, err := GetConfigDir()
+	if err != nil {
+		SendErrorResponse(w, http.StatusInternalServerError, "failed to get config directory")
+		return
+	}
+
+	configFileName := fmt.Sprintf("superfrpc_%s_%s.toml", user.Username, req.InstanceInfo.Name)
+	configPath := filepath.Join(configDir, configFileName)
+
+	configContent := generateFrpcConfig(req.InstanceInfo)
+	if err := os.WriteFile(configPath, []byte(configContent), 0644); err != nil {
+		SendErrorResponse(w, http.StatusInternalServerError, "failed to create config file")
+		return
+	}
+
+	_, err = frpcDB.Exec(`
+		INSERT INTO frpcInstances (userID, name, serverAddr, serverPort, auth_method, bootAtStart, runUser, configPath, createdAt)
+		VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)
+	`, userID, req.InstanceInfo.Name, req.InstanceInfo.ServerAddr, req.InstanceInfo.ServerPort,
+		req.InstanceInfo.AuthMethod, req.BootAtStart, runUser, configPath, time.Now().Format(time.RFC3339))
+
+	if err != nil {
+		os.Remove(configPath)
+		SendErrorResponse(w, http.StatusInternalServerError, "failed to save instance to database")
+		return
+	}
+
+	if req.BootAtStart {
+		if err := createBootService(user.Username, req.InstanceInfo.Name, configPath, runUser); err != nil {
+			frpcDB.Exec("DELETE FROM frpcInstances WHERE userID = ? AND name = ?", userID, req.InstanceInfo.Name)
+			os.Remove(configPath)
+			SendErrorResponse(w, http.StatusInternalServerError, "failed to create boot service")
+			return
+		}
+	}
+
+	SendSuccessResponse(w, "instance created successfully", map[string]interface{}{
+		"name":        req.InstanceInfo.Name,
+		"configPath":  configPath,
+		"bootAtStart": req.BootAtStart,
+	})
+}
+
+func DeleteInstanceHandler(w http.ResponseWriter, r *http.Request, instanceName string) {
+	if r.Method != http.MethodPost {
+		SendErrorResponse(w, http.StatusMethodNotAllowed, "invalid request method")
+		return
+	}
+
+	userID, _, err := ValidateRequest(w, r)
+	if err != nil {
+		SendErrorResponse(w, http.StatusUnauthorized, err.Error())
+		return
+	}
+
+	if err := CheckPermission(userID, "superuser", "admin"); err != nil {
+		SendErrorResponse(w, http.StatusForbidden, err.Error())
+		return
+	}
+
+	user, err := GetUserByID(userID)
+	if err != nil {
+		SendErrorResponse(w, http.StatusInternalServerError, "failed to get user info")
+		return
+	}
+
+	var instance FrpcInstance
+	err = frpcDB.QueryRow(`
+		SELECT id, userID, name, serverAddr, serverPort, auth_method, bootAtStart, runUser, configPath, createdAt
+		FROM frpcInstances WHERE userID = ? AND name = ?
+	`, userID, instanceName).Scan(
+		&instance.ID, &instance.UserID, &instance.Name, &instance.ServerAddr, &instance.ServerPort,
+		&instance.AuthMethod, &instance.BootAtStart, &instance.RunUser, &instance.ConfigPath, &instance.CreatedAt)
+
+	if err == sql.ErrNoRows {
+		SendErrorResponse(w, http.StatusNotFound, "instance not found")
+		return
+	}
+	if err != nil {
+		SendErrorResponse(w, http.StatusInternalServerError, "failed to query instance")
+		return
+	}
+
+	if instance.BootAtStart {
+		if err := removeBootService(user.Username, instanceName); err != nil {
+			SendErrorResponse(w, http.StatusInternalServerError, "failed to remove boot service")
+			return
+		}
+	}
+
+	if _, err := os.Stat(instance.ConfigPath); err == nil {
+		if err := os.Remove(instance.ConfigPath); err != nil {
+			SendErrorResponse(w, http.StatusInternalServerError, "failed to remove config file")
+			return
+		}
+	}
+
+	_, err = frpcDB.Exec("DELETE FROM frpcInstances WHERE id = ?", instance.ID)
+	if err != nil {
+		SendErrorResponse(w, http.StatusInternalServerError, "failed to delete instance from database")
+		return
+	}
+
+	SendSuccessResponse(w, "instance deleted successfully", map[string]interface{}{
+		"name": instanceName,
+	})
+}
+
+func ModifyInstanceHandler(w http.ResponseWriter, r *http.Request, instanceName string) {
+	if r.Method != http.MethodPost {
+		SendErrorResponse(w, http.StatusMethodNotAllowed, "invalid request method")
+		return
+	}
+
+	body, err := io.ReadAll(r.Body)
+	if err != nil {
+		SendErrorResponse(w, http.StatusBadRequest, "failed to read request body")
+		return
+	}
+	defer r.Body.Close()
+
+	var reqMap map[string]interface{}
+	if err := json.Unmarshal(body, &reqMap); err != nil {
+		SendErrorResponse(w, http.StatusBadRequest, "invalid request format")
+		return
+	}
+
+	userID, _, err := ValidateRequest(w, r)
+	if err != nil {
+		SendErrorResponse(w, http.StatusUnauthorized, err.Error())
+		return
+	}
+
+	if err := CheckPermission(userID, "superuser", "admin"); err != nil {
+		SendErrorResponse(w, http.StatusForbidden, err.Error())
+		return
+	}
+
+	user, err := GetUserByID(userID)
+	if err != nil {
+		SendErrorResponse(w, http.StatusInternalServerError, "failed to get user info")
+		return
+	}
+
+	var instance FrpcInstance
+	err = frpcDB.QueryRow(`
+		SELECT id, userID, name, serverAddr, serverPort, auth_method, bootAtStart, runUser, configPath, createdAt
+		FROM frpcInstances WHERE userID = ? AND name = ?
+	`, userID, instanceName).Scan(
+		&instance.ID, &instance.UserID, &instance.Name, &instance.ServerAddr, &instance.ServerPort,
+		&instance.AuthMethod, &instance.BootAtStart, &instance.RunUser, &instance.ConfigPath, &instance.CreatedAt)
+
+	if err == sql.ErrNoRows {
+		SendErrorResponse(w, http.StatusNotFound, "instance not found")
+		return
+	}
+	if err != nil {
+		SendErrorResponse(w, http.StatusInternalServerError, "failed to query instance")
+		return
+	}
+
+	newName := instance.Name
+	newServerAddr := instance.ServerAddr
+	newServerPort := instance.ServerPort
+	newAuthMethod := instance.AuthMethod
+	newRunUser := instance.RunUser
+	newBootAtStart := instance.BootAtStart
+
+	if v, ok := reqMap["name"].(string); ok && v != "" {
+		newName = v
+	}
+	if v, ok := reqMap["serverAddr"].(string); ok && v != "" {
+		newServerAddr = v
+	}
+	if v, ok := reqMap["serverPort"].(string); ok && v != "" {
+		newServerPort = v
+	}
+	if v, ok := reqMap["auth_method"].(string); ok && v != "" {
+		newAuthMethod = v
+	}
+	if v, ok := reqMap["runUser"].(string); ok && v != "" {
+		newRunUser = v
+	}
+	if v, ok := reqMap["bootAtStart"].(bool); ok {
+		newBootAtStart = v
+	}
+
+	oldConfigPath := instance.ConfigPath
+	var newConfigPath string
+	if newName != instance.Name || newRunUser != instance.RunUser {
+		configDir, err := GetConfigDir()
+		if err != nil {
+			SendErrorResponse(w, http.StatusInternalServerError, "failed to get config directory")
+			return
+		}
+
+		newConfigFileName := fmt.Sprintf("superfrpc_%s_%s.toml", user.Username, newName)
+		newConfigPath = filepath.Join(configDir, newConfigFileName)
+
+		if oldConfigPath != newConfigPath {
+			if _, err := os.Stat(oldConfigPath); err == nil {
+				if err := os.Rename(oldConfigPath, newConfigPath); err != nil {
+					SendErrorResponse(w, http.StatusInternalServerError, "failed to rename config file")
+					return
+				}
+			}
+		}
+	} else {
+		newConfigPath = oldConfigPath
+	}
+
+	info := InstanceInfo{
+		Name:       newName,
+		ServerAddr: newServerAddr,
+		ServerPort: newServerPort,
+		AuthMethod: newAuthMethod,
+		RunUser:    newRunUser,
+	}
+
+	configContent := generateFrpcConfig(info)
+	if err := os.WriteFile(newConfigPath, []byte(configContent), 0644); err != nil {
+		SendErrorResponse(w, http.StatusInternalServerError, "failed to update config file")
+		return
+	}
+
+	_, err = frpcDB.Exec(`
+		UPDATE frpcInstances 
+		SET name = ?, serverAddr = ?, serverPort = ?, auth_method = ?, bootAtStart = ?, runUser = ?, configPath = ?
+		WHERE id = ?
+	`, newName, newServerAddr, newServerPort, newAuthMethod, newBootAtStart, newRunUser, newConfigPath, instance.ID)
+
+	if err != nil {
+		SendErrorResponse(w, http.StatusInternalServerError, "failed to update instance in database")
+		return
+	}
+
+	if instance.BootAtStart && !newBootAtStart {
+		removeBootService(user.Username, instanceName)
+	} else if !instance.BootAtStart && newBootAtStart {
+		createBootService(user.Username, newName, newConfigPath, newRunUser)
+	} else if instance.BootAtStart && newBootAtStart && (instance.Name != newName || instance.RunUser != newRunUser) {
+		removeBootService(user.Username, instanceName)
+		createBootService(user.Username, newName, newConfigPath, newRunUser)
+	}
+
+	SendSuccessResponse(w, "instance modified successfully", map[string]interface{}{
+		"name":       newName,
+		"configPath": newConfigPath,
+	})
+}
+
+func ListInstancesHandler(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		SendErrorResponse(w, http.StatusMethodNotAllowed, "invalid request method")
+		return
+	}
+
+	userID, _, err := ValidateRequest(w, r)
+	if err != nil {
+		SendErrorResponse(w, http.StatusUnauthorized, err.Error())
+		return
+	}
+
+	userType, err := GetUserType(userID)
+	if err != nil {
+		SendErrorResponse(w, http.StatusInternalServerError, "failed to get user type")
+		return
+	}
+
+	rows, err := frpcDB.Query(`
+		SELECT id, userID, name, serverAddr, serverPort, auth_method, bootAtStart, runUser, configPath, createdAt
+		FROM frpcInstances WHERE userID = ?
+	`, userID)
+	if err != nil {
+		SendErrorResponse(w, http.StatusInternalServerError, "failed to query instances")
+		return
+	}
+	defer rows.Close()
+
+	var instances []map[string]interface{}
+	for rows.Next() {
+		var instance FrpcInstance
+		var createdAtStr string
+		if err := rows.Scan(
+			&instance.ID, &instance.UserID, &instance.Name, &instance.ServerAddr, &instance.ServerPort,
+			&instance.AuthMethod, &instance.BootAtStart, &instance.RunUser, &instance.ConfigPath, &createdAtStr,
+		); err != nil {
+			SendErrorResponse(w, http.StatusInternalServerError, "failed to scan instance")
+			return
+		}
+
+		instanceData := map[string]interface{}{
+			"name":        instance.Name,
+			"serverAddr":  instance.ServerAddr,
+			"serverPort":  instance.ServerPort,
+			"auth_method": instance.AuthMethod,
+			"bootAtStart": instance.BootAtStart,
+			"runUser":     instance.RunUser,
+			"configPath":  instance.ConfigPath,
+			"createdAt":   createdAtStr,
+		}
+
+		if userType == "visitor" {
+			delete(instanceData, "serverAddr")
+			delete(instanceData, "serverPort")
+			delete(instanceData, "auth_method")
+		}
+
+		instances = append(instances, instanceData)
+	}
+
+	if instances == nil {
+		instances = []map[string]interface{}{}
+	}
+
+	SendSuccessResponse(w, "instances retrieved successfully", instances)
+}
+
+func generateFrpcConfig(info InstanceInfo) string {
+	var sb strings.Builder
+	sb.WriteString("[common]\n")
+	sb.WriteString(fmt.Sprintf("server_addr = %s\n", info.ServerAddr))
+	sb.WriteString(fmt.Sprintf("server_port = %s\n", info.ServerPort))
+	sb.WriteString(fmt.Sprintf("auth_method = %s\n", info.AuthMethod))
+
+	for key, value := range info.Additional {
+		sb.WriteString(fmt.Sprintf("%s = %v\n", key, value))
+	}
+
+	return sb.String()
+}
+
+func GetConfigDir() (string, error) {
+	config, err := GetConfig()
+	if err != nil {
+		return "", err
+	}
+	return config.InstancePath, nil
+}
+
+func GetFrpcPath() (string, error) {
+	config, err := GetConfig()
+	if err != nil {
+		return "", err
+	}
+	return config.FrpcPath, nil
+}
+
+func detectInitSystem() string {
+	if _, err := os.Stat("/run/systemd/system"); err == nil {
+		return "systemd"
+	}
+	if _, err := os.Stat("/etc/init.d"); err == nil {
+		return "init.d"
+	}
+	return "unknown"
+}
+
+func createBootService(username, instanceName, configPath, runUser string) error {
+	initSystem := detectInitSystem()
+
+	switch initSystem {
+	case "systemd":
+		return createSystemdService(username, instanceName, configPath, runUser)
+	case "init.d":
+		return createInitDService(username, instanceName, configPath, runUser)
+	default:
+		return errors.New("unsupported init system")
+	}
+}
+
+func createSystemdService(username, instanceName, configPath, runUser string) error {
+	frpcPath, err := GetFrpcPath()
+	if err != nil {
+		return err
+	}
+
+	serviceName := fmt.Sprintf("superfrpc_%s_%s", username, instanceName)
+	serviceContent := fmt.Sprintf(`[Unit]
+Description=superfrpc_%s_%s
+After=network.target
+
+[Service]
+Type=simple
+ExecStart=%s -c %s
+User=%s
+Restart=on-failure
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
+`, username, instanceName, frpcPath, configPath, runUser)
+
+	servicePath := filepath.Join("/etc/systemd/system", serviceName+".service")
+	if err := os.WriteFile(servicePath, []byte(serviceContent), 0644); err != nil {
+		return fmt.Errorf("failed to create systemd service file: %w", err)
+	}
+
+	cmd := exec.Command("systemctl", "enable", serviceName)
+	if output, err := cmd.CombinedOutput(); err != nil {
+		os.Remove(servicePath)
+		return fmt.Errorf("failed to enable service: %s, output: %s", err, output)
+	}
+
+	cmd = exec.Command("systemctl", "daemon-reload")
+	if output, err := cmd.CombinedOutput(); err != nil {
+		return fmt.Errorf("failed to reload daemon: %s, output: %s", err, output)
+	}
+
+	return nil
+}
+
+func createInitDService(username, instanceName, configPath, runUser string) error {
+	frpcPath, err := GetFrpcPath()
+	if err != nil {
+		return err
+	}
+
+	serviceName := fmt.Sprintf("superfrpc_%s_%s", username, instanceName)
+
+	var serviceContent string
+	runUserArg := ""
+	if runUser != "" && runUser != "root" {
+		runUserArg = runUser
+		serviceContent = fmt.Sprintf(`#!/bin/sh
+
+### BEGIN INIT INFO
+# Provides:          %s
+# Required-Start:    $network $remote_fs $syslog
+# Required-Stop:     $network $remote_fs $syslog
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
+# Description:       superfrpc %s %s
+### END INIT INFO
+
+NAME="%s"
+PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
+DAEMON=%s
+DAEMON_ARGS="-c %s"
+SCRIPTNAME=/etc/init.d/$NAME
+USER=%s
+
+[ -x "$DAEMON" ] || exit 0
+
+case "$1" in
+  start)
+        echo -n "Starting $NAME: "
+        start-stop-daemon -S -c $USER -b -m -p /var/run/$NAME.pid --start --exec $DAEMON -- $DAEMON_ARGS
+        echo "$NAME."
+        ;;
+  stop)
+        echo -n "Stopping $NAME: "
+        start-stop-daemon -K -p /var/run/$NAME.pid
+        rm -f /var/run/$NAME.pid
+        echo "$NAME."
+        ;;
+  restart)
+        $0 stop
+        $0 start
+        ;;
+  status)
+        if [ -f /var/run/$NAME.pid ]; then
+            echo "$NAME is running (pid $(cat /var/run/$NAME.pid))"
+        else
+            echo "$NAME is not running"
+        fi
+        ;;
+  *)
+        echo "Usage: $SCRIPTNAME {start|stop|restart|status}"
+        exit 1
+        ;;
+esac
+
+exit 0
+`, serviceName, username, instanceName, serviceName, frpcPath, configPath, runUserArg)
+	} else {
+		serviceContent = fmt.Sprintf(`#!/bin/sh
+
+### BEGIN INIT INFO
+# Provides:          %s
+# Required-Start:    $network $remote_fs $syslog
+# Required-Stop:     $network $remote_fs $syslog
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
+# Description:       superfrpc %s %s
+### END INIT INFO
+
+NAME="%s"
+PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
+DAEMON=%s
+DAEMON_ARGS="-c %s"
+SCRIPTNAME=/etc/init.d/$NAME
+
+[ -x "$DAEMON" ] || exit 0
+
+case "$1" in
+  start)
+        echo -n "Starting $NAME: "
+        start-stop-daemon -S -b -m -p /var/run/$NAME.pid --start --exec $DAEMON -- $DAEMON_ARGS
+        echo "$NAME."
+        ;;
+  stop)
+        echo -n "Stopping $NAME: "
+        start-stop-daemon -K -p /var/run/$NAME.pid
+        rm -f /var/run/$NAME.pid
+        echo "$NAME."
+        ;;
+  restart)
+        $0 stop
+        $0 start
+        ;;
+  status)
+        if [ -f /var/run/$NAME.pid ]; then
+            echo "$NAME is running (pid $(cat /var/run/$NAME.pid))"
+        else
+            echo "$NAME is not running"
+        fi
+        ;;
+  *)
+        echo "Usage: $SCRIPTNAME {start|stop|restart|status}"
+        exit 1
+        ;;
+esac
+
+exit 0
+`, serviceName, username, instanceName, serviceName, frpcPath, configPath)
+	}
+
+	servicePath := filepath.Join("/etc/init.d", serviceName)
+	if err := os.WriteFile(servicePath, []byte(serviceContent), 0755); err != nil {
+		return fmt.Errorf("failed to create init.d service file: %w", err)
+	}
+
+	cmd := exec.Command("/etc/init.d", serviceName, "enable")
+	if output, err := cmd.CombinedOutput(); err != nil {
+		os.Remove(servicePath)
+		return fmt.Errorf("failed to enable service: %s, output: %s", err, output)
+	}
+
+	return nil
+}
+
+func removeBootService(username, instanceName string) error {
+	initSystem := detectInitSystem()
+
+	serviceName := fmt.Sprintf("superfrpc_%s_%s", username, instanceName)
+
+	switch initSystem {
+	case "systemd":
+		cmd := exec.Command("systemctl", "disable", serviceName)
+		cmd.CombinedOutput()
+
+		servicePath := filepath.Join("/etc/systemd/system", serviceName+".service")
+		os.Remove(servicePath)
+
+		cmd = exec.Command("systemctl", "daemon-reload")
+		cmd.CombinedOutput()
+
+	case "init.d":
+		cmd := exec.Command("/etc/init.d", serviceName, "disable")
+		cmd.CombinedOutput()
+
+		servicePath := filepath.Join("/etc/init.d", serviceName)
+		os.Remove(servicePath)
+	}
+
+	return nil
+}
+
+func GetUserInstances(userID int) ([]FrpcInstance, error) {
+	rows, err := frpcDB.Query(`
+		SELECT id, userID, name, serverAddr, serverPort, auth_method, bootAtStart, runUser, configPath, createdAt
+		FROM frpcInstances WHERE userID = ?
+	`, userID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var instances []FrpcInstance
+	for rows.Next() {
+		var instance FrpcInstance
+		var createdAtStr string
+		if err := rows.Scan(
+			&instance.ID, &instance.UserID, &instance.Name, &instance.ServerAddr, &instance.ServerPort,
+			&instance.AuthMethod, &instance.BootAtStart, &instance.RunUser, &instance.ConfigPath, &createdAtStr,
+		); err != nil {
+			return nil, err
+		}
+		instance.CreatedAt, _ = time.Parse(time.RFC3339, createdAtStr)
+		instances = append(instances, instance)
+	}
+
+	return instances, nil
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..035103c
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,18 @@
+module super-frpc
+
+go 1.24.0
+
+require modernc.org/sqlite v1.46.1
+
+require (
+	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/ncruces/go-strftime v1.0.0 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
+	golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546 // indirect
+	golang.org/x/sys v0.37.0 // indirect
+	modernc.org/libc v1.67.6 // indirect
+	modernc.org/mathutil v1.7.1 // indirect
+	modernc.org/memory v1.11.0 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..28bd8d8
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,25 @@
+github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
+github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
+github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/mattn/go-sqlite3 v1.14.34 h1:3NtcvcUnFBPsuRcno8pUtupspG/GM+9nZ88zgJcp6Zk=
+github.com/mattn/go-sqlite3 v1.14.34/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=
+github.com/ncruces/go-strftime v1.0.0 h1:HMFp8mLCTPp341M/ZnA4qaf7ZlsbTc+miZjCLOFAw7w=
+github.com/ncruces/go-strftime v1.0.0/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
+github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
+github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
+golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546 h1:mgKeJMpvi0yx/sU5GsxQ7p6s2wtOnGAHZWCHUM4KGzY=
+golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546/go.mod h1:j/pmGrbnkbPtQfxEe5D0VQhZC6qKbfKifgD0oM7sR70=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.37.0 h1:fdNQudmxPjkdUTPnLn5mdQv7Zwvbvpaxqs831goi9kQ=
+golang.org/x/sys v0.37.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+modernc.org/libc v1.67.6 h1:eVOQvpModVLKOdT+LvBPjdQqfrZq+pC39BygcT+E7OI=
+modernc.org/libc v1.67.6/go.mod h1:JAhxUVlolfYDErnwiqaLvUqc8nfb2r6S6slAgZOnaiE=
+modernc.org/mathutil v1.7.1 h1:GCZVGXdaN8gTqB1Mf/usp1Y/hSqgI2vAGGP4jZMCxOU=
+modernc.org/mathutil v1.7.1/go.mod h1:4p5IwJITfppl0G4sUEDtCr4DthTaT47/N3aT6MhfgJg=
+modernc.org/memory v1.11.0 h1:o4QC8aMQzmcwCK3t3Ux/ZHmwFPzE6hf2Y5LbkRs+hbI=
+modernc.org/memory v1.11.0/go.mod h1:/JP4VbVC+K5sU2wZi9bHoq2MAkCnrt2r98UGeSK7Mjw=
+modernc.org/sqlite v1.46.1 h1:eFJ2ShBLIEnUWlLy12raN0Z1plqmFX9Qe3rjQTKt6sU=
+modernc.org/sqlite v1.46.1/go.mod h1:CzbrU2lSB1DKUusvwGz7rqEKIq+NUd8GWuBBZDs9/nA=
diff --git a/handlers.go b/handlers.go
new file mode 100644
index 0000000..fd6322b
--- /dev/null
+++ b/handlers.go
@@ -0,0 +1,286 @@
+package main
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"strconv"
+	"time"
+)
+
+type RegisterRequest struct {
+	Username  string `json:"username"`
+	Passwd    string `json:"passwd"`
+	TimeStamp int64  `json:"timeStamp"`
+	Type      string `json:"type"`
+}
+
+type LoginRequest struct {
+	Username  string `json:"username"`
+	Passwd    string `json:"passwd"`
+	TimeStamp int64  `json:"timeStamp"`
+}
+
+type Response struct {
+	Success bool        `json:"success"`
+	Message string      `json:"message,omitempty"`
+	Data    interface{} `json:"data,omitempty"`
+}
+
+func RegisterHandler(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		SendErrorResponse(w, http.StatusMethodNotAllowed, "invalid request method")
+		return
+	}
+
+	body, err := io.ReadAll(r.Body)
+	if err != nil {
+		SendErrorResponse(w, http.StatusBadRequest, "failed to read request body")
+		return
+	}
+	defer r.Body.Close()
+
+	var req RegisterRequest
+	if err := json.Unmarshal(body, &req); err != nil {
+		SendErrorResponse(w, http.StatusBadRequest, "invalid request format")
+		return
+	}
+
+	if req.Username == "" || req.Passwd == "" {
+		SendErrorResponse(w, http.StatusBadRequest, "username and password are required")
+		return
+	}
+
+	currentTime := time.Now().UnixMilli()
+	if !globalConfig.Debug && (currentTime-req.TimeStamp > 3000 || req.TimeStamp-currentTime > 3000) {
+		SendErrorResponse(w, http.StatusBadRequest, "timestamp out of valid range")
+		return
+	}
+
+	if !isValidInput(req.Username) || !isValidInput(req.Passwd) {
+		SendErrorResponse(w, http.StatusBadRequest, "invalid input: contains illegal characters")
+		return
+	}
+
+	if !isValidPassword(req.Passwd) {
+		SendErrorResponse(w, http.StatusBadRequest, "password does not meet complexity requirements (must contain uppercase, lowercase, digit, and special character)")
+		return
+	}
+
+	userType := req.Type
+	if userType == "" {
+		userType = "visitor"
+	}
+
+	validTypes := map[string]bool{
+		"superuser": true,
+		"admin":     true,
+		"visitor":   true,
+	}
+	if !validTypes[userType] {
+		SendErrorResponse(w, http.StatusBadRequest, "invalid user type")
+		return
+	}
+
+	userID, err := AddUser(req.Username, req.Passwd, userType)
+	if err != nil {
+		SendErrorResponse(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	user, err := GetUserByID(userID)
+	if err != nil {
+		SendErrorResponse(w, http.StatusInternalServerError, "failed to retrieve user after registration")
+		return
+	}
+
+	SendSuccessResponse(w, "user registered successfully", map[string]interface{}{
+		"userID":   user.UserID,
+		"username": user.Username,
+		"type":     user.Type,
+	})
+}
+
+func LoginHandler(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		SendErrorResponse(w, http.StatusMethodNotAllowed, "invalid request method")
+		return
+	}
+
+	body, err := io.ReadAll(r.Body)
+	if err != nil {
+		SendErrorResponse(w, http.StatusBadRequest, "failed to read request body")
+		return
+	}
+	defer r.Body.Close()
+
+	var req LoginRequest
+	if err := json.Unmarshal(body, &req); err != nil {
+		SendErrorResponse(w, http.StatusBadRequest, "invalid request format")
+		return
+	}
+
+	if req.Username == "" || req.Passwd == "" {
+		SendErrorResponse(w, http.StatusBadRequest, "username and password are required")
+		return
+	}
+
+	currentTime := time.Now().UnixMilli()
+	if !globalConfig.Debug && (currentTime-req.TimeStamp > 3000 || req.TimeStamp-currentTime > 3000) {
+		SendErrorResponse(w, http.StatusBadRequest, "timestamp out of valid range")
+		return
+	}
+
+	if !isValidInput(req.Username) || !isValidInput(req.Passwd) {
+		SendErrorResponse(w, http.StatusBadRequest, "invalid input: contains illegal characters")
+		return
+	}
+
+	user, err := GetUserByUsername(req.Username)
+	if err != nil {
+		SendErrorResponse(w, http.StatusUnauthorized, "invalid username or password")
+		return
+	}
+
+	if !verifyPassword(req.Passwd, user.Passwd) {
+		SendErrorResponse(w, http.StatusUnauthorized, "invalid username or password")
+		return
+	}
+
+	token, err := GenerateToken(user.UserID)
+	if err != nil {
+		SendErrorResponse(w, http.StatusInternalServerError, "failed to generate token")
+		return
+	}
+
+	SendSuccessResponse(w, "login successful", map[string]interface{}{
+		"token":    token,
+		"userID":   user.UserID,
+		"username": user.Username,
+		"type":     user.Type,
+	})
+}
+
+func SendErrorResponse(w http.ResponseWriter, statusCode int, message string) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(statusCode)
+	resp := Response{
+		Success: false,
+		Message: message,
+	}
+	jsonResp, err := json.Marshal(resp)
+	if err != nil {
+		log.Printf("failed to marshal error response: %v", err)
+		return
+	}
+	w.Write(jsonResp)
+}
+
+func SendSuccessResponse(w http.ResponseWriter, message string, data interface{}) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusOK)
+	resp := Response{
+		Success: true,
+		Message: message,
+		Data:    data,
+	}
+	jsonResp, err := json.Marshal(resp)
+	if err != nil {
+		log.Printf("failed to marshal success response: %v", err)
+		return
+	}
+	w.Write(jsonResp)
+}
+
+func ValidateRequest(w http.ResponseWriter, r *http.Request, requiredFields ...string) (int, string, error) {
+	body, err := io.ReadAll(r.Body)
+	if err != nil {
+		return 0, "", errors.New("failed to read request body")
+	}
+	defer r.Body.Close()
+
+	var reqMap map[string]interface{}
+	if err := json.Unmarshal(body, &reqMap); err != nil {
+		return 0, "", errors.New("invalid request format")
+	}
+
+	token, ok := reqMap["token"].(string)
+	if !ok || token == "" {
+		return 0, "", errors.New("token is required")
+	}
+
+	timeStamp, ok := reqMap["timeStamp"].(float64)
+	if !ok {
+		return 0, "", errors.New("timeStamp is required")
+	}
+
+	currentTime := time.Now().UnixMilli()
+	if !globalConfig.Debug && (currentTime-int64(timeStamp) > 3000 || int64(timeStamp)-currentTime > 3000) {
+		return 0, "", errors.New("timestamp out of valid range")
+	}
+
+	userID, err := extractUserIDFromToken(token)
+	if err != nil {
+		return 0, "", err
+	}
+
+	if err := ValidateToken(userID, token); err != nil {
+		return 0, "", err
+	}
+
+	for _, field := range requiredFields {
+		if _, ok := reqMap[field]; !ok {
+			return 0, "", fmt.Errorf("required field %s is missing", field)
+		}
+	}
+
+	return userID, token, nil
+}
+
+func GetUserType(userID int) (string, error) {
+	user, err := GetUserByID(userID)
+	if err != nil {
+		return "", err
+	}
+	return user.Type, nil
+}
+
+func CheckPermission(userID int, requiredTypes ...string) error {
+	userType, err := GetUserType(userID)
+	if err != nil {
+		return err
+	}
+
+	for _, t := range requiredTypes {
+		if userType == t {
+			return nil
+		}
+	}
+
+	return errors.New("permission denied")
+}
+
+func GetClientIP(r *http.Request) string {
+	forwarded := r.Header.Get("X-Forwarded-For")
+	if forwarded != "" {
+		return forwarded
+	}
+	return r.RemoteAddr
+}
+
+func LogRequest(r *http.Request, userID int) {
+	log.Printf("[%s] %s %s - UserID: %d - IP: %s",
+		time.Now().Format("2006-01-02 15:04:05"),
+		r.Method,
+		r.URL.Path,
+		userID,
+		GetClientIP(r),
+	)
+}
+
+func IntToString(i int) string {
+	return strconv.Itoa(i)
+}
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..25090b9
--- /dev/null
+++ b/main.go
@@ -0,0 +1,141 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+	"os/signal"
+	"strings"
+	"syscall"
+	"time"
+)
+
+func main() {
+	configPath := flag.String("config", "./config.json", "path to config file")
+	dbPath := flag.String("db", "./database.db", "path to database file")
+	flag.Parse()
+
+	if _, err := os.Stat(*configPath); os.IsNotExist(err) {
+		defaultConfig := `{
+	listenAddr": "	"0.0.0.0",
+	"listenPort": "8080",
+	"configDir": "./configs"
+}`
+		if err := os.WriteFile(*configPath, []byte(defaultConfig), 0644); err != nil {
+			log.Fatalf("failed to create default config file: %v", err)
+		}
+		log.Printf("created default config file at %s", *configPath)
+	}
+
+	_, err := LoadConfig(*configPath)
+	if err != nil {
+		log.Fatalf("failed to load config: %v", err)
+	}
+
+	if err := InitDatabase(*dbPath); err != nil {
+		log.Fatalf("failed to initialize database: %v", err)
+	}
+	log.Println("database initialized successfully")
+
+	if err := InitFrpcDatabase(*dbPath); err != nil {
+		log.Printf("warning: failed to initialize frpc database: %v", err)
+	}
+
+	config, err := GetConfig()
+	if err != nil {
+		log.Fatalf("failed to get config: %v", err)
+	}
+
+	setupRoutes()
+
+	addr := fmt.Sprintf("%s:%s", config.ListenAddr, config.ListenPort)
+	server := &http.Server{
+		Addr:         addr,
+		ReadTimeout:  15 * time.Second,
+		WriteTimeout: 15 * time.Second,
+		IdleTimeout:  60 * time.Second,
+	}
+
+	go func() {
+		log.Printf("server starting on %s", addr)
+		if err := server.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+			log.Fatalf("failed to start server: %v", err)
+		}
+	}()
+
+	quit := make(chan os.Signal, 1)
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
+	<-quit
+
+	log.Println("shutting down server...")
+
+	if err := server.Close(); err != nil {
+		log.Printf("server closed with error: %v", err)
+	}
+
+	if err := CloseDatabase(); err != nil {
+		log.Printf("error closing database: %v", err)
+	}
+
+	if err := CloseFrpcDatabase(); err != nil {
+		log.Printf("error closing frpc database: %v", err)
+	}
+
+	log.Println("server stopped")
+}
+
+func setupRoutes() {
+	http.HandleFunc("/register", RegisterHandler)
+	http.HandleFunc("/login", LoginHandler)
+
+	http.HandleFunc("/frpcAct/instanceMgr/create", CreateInstanceHandler)
+	http.HandleFunc("/frpcAct/instanceMgr/list", ListInstancesHandler)
+
+	http.HandleFunc("/frpcAct/instanceMgr/", func(w http.ResponseWriter, r *http.Request) {
+		path := r.URL.Path
+		if len(path) < len("/frpcAct/instanceMgr/") {
+			SendErrorResponse(w, http.StatusNotFound, "invalid path")
+			return
+		}
+
+		remainingPath := path[len("/frpcAct/instanceMgr/"):]
+
+		if r.Method == http.MethodPost {
+			if remainingPath == "create" {
+				CreateInstanceHandler(w, r)
+				return
+			}
+
+			if remainingPath == "list" {
+				ListInstancesHandler(w, r)
+				return
+			}
+
+			if strings.HasSuffix(remainingPath, "/delete") {
+				instanceName := strings.TrimSuffix(remainingPath, "/delete")
+				instanceName = strings.Trim(instanceName, "/")
+				DeleteInstanceHandler(w, r, instanceName)
+				return
+			}
+
+			if strings.Contains(remainingPath, "/modify/") {
+				parts := strings.SplitN(remainingPath, "/modify/", 2)
+				if len(parts) == 2 {
+					instanceName := strings.Trim(parts[0], "/")
+					ModifyInstanceHandler(w, r, instanceName)
+					return
+				}
+			}
+
+			instanceName := strings.Trim(remainingPath, "/")
+			if instanceName != "" {
+				ListInstancesHandler(w, r)
+				return
+			}
+		}
+
+		SendErrorResponse(w, http.StatusNotFound, "endpoint not found")
+	})
+}
diff --git a/super-frpc-linux b/super-frpc-linux
new file mode 100644
index 0000000..198561a
Binary files /dev/null and b/super-frpc-linux differ