更新管理登录功能

internal/handler/auth.go

@@ -0,0 +1,79 @@
+package handler
+
+import (
+	"net/http"
+
+	"lmvpn/internal/db"
+	"lmvpn/internal/middleware"
+	"lmvpn/internal/model"
+
+	"github.com/gin-gonic/gin"
+	"golang.org/x/crypto/bcrypt"
+)
+
+type loginRequest struct {
+	Username string `json:"username" binding:"required"`
+	Password string `json:"password" binding:"required"`
+}
+
+type loginResponse struct {
+	Token string   `json:"token"`
+	User  userInfo `json:"user"`
+}
+
+type userInfo struct {
+	ID       uint   `json:"id"`
+	Username string `json:"username"`
+	Role     string `json:"role"`
+}
+
+func Login(c *gin.Context) {
+	var req loginRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "请输入用户名和密码"})
+		return
+	}
+
+	var user model.User
+	if err := db.DB.Where("username = ?", req.Username).First(&user).Error; err != nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "用户名或密码错误"})
+		return
+	}
+
+	if err := bcrypt.CompareHashAndPassword([]byte(user.Password), []byte(req.Password)); err != nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "用户名或密码错误"})
+		return
+	}
+
+	if user.Status != 1 {
+		c.JSON(http.StatusForbidden, gin.H{"error": "账号已被禁用"})
+		return
+	}
+
+	token, err := middleware.GenerateToken(user.ID, user.Username, user.Role)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "生成令牌失败"})
+		return
+	}
+
+	c.JSON(http.StatusOK, loginResponse{
+		Token: token,
+		User: userInfo{
+			ID:       user.ID,
+			Username: user.Username,
+			Role:     user.Role,
+		},
+	})
+}
+
+func Me(c *gin.Context) {
+	userID, _ := c.Get("user_id")
+	username, _ := c.Get("username")
+	role, _ := c.Get("role")
+
+	c.JSON(http.StatusOK, userInfo{
+		ID:       userID.(uint),
+		Username: username.(string),
+		Role:     role.(string),
+	})
+}

internal/middleware/auth.go

@@ -0,0 +1,82 @@
+package middleware
+
+import (
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/golang-jwt/jwt/v5"
+)
+
+const (
+	jwtSecret   = "lmvpn-jwt-secret-key-2024"
+	tokenExpire = 24 * time.Hour
+)
+
+type Claims struct {
+	UserID   uint   `json:"user_id"`
+	Username string `json:"username"`
+	Role     string `json:"role"`
+	jwt.RegisteredClaims
+}
+
+func GenerateToken(userID uint, username, role string) (string, error) {
+	claims := Claims{
+		UserID:   userID,
+		Username: username,
+		Role:     role,
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(time.Now().Add(tokenExpire)),
+			IssuedAt:  jwt.NewNumericDate(time.Now()),
+		},
+	}
+
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	return token.SignedString([]byte(jwtSecret))
+}
+
+func ParseToken(tokenStr string) (*Claims, error) {
+	token, err := jwt.ParseWithClaims(tokenStr, &Claims{}, func(token *jwt.Token) (interface{}, error) {
+		return []byte(jwtSecret), nil
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	if claims, ok := token.Claims.(*Claims); ok && token.Valid {
+		return claims, nil
+	}
+
+	return nil, jwt.ErrSignatureInvalid
+}
+
+func AuthMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		authHeader := c.GetHeader("Authorization")
+		if authHeader == "" {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "未提供认证令牌"})
+			c.Abort()
+			return
+		}
+
+		parts := strings.SplitN(authHeader, " ", 2)
+		if len(parts) != 2 || parts[0] != "Bearer" {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "认证格式错误"})
+			c.Abort()
+			return
+		}
+
+		claims, err := ParseToken(parts[1])
+		if err != nil {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "令牌无效或已过期"})
+			c.Abort()
+			return
+		}
+
+		c.Set("user_id", claims.UserID)
+		c.Set("username", claims.Username)
+		c.Set("role", claims.Role)
+		c.Next()
+	}
+}