initial commit

server/internal/middleware/auth.go

@@ -0,0 +1,86 @@
+package middleware
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	"github.com/novablog/server/internal/utils"
+)
+
+// AuthMiddleware JWT 认证中间件
+func AuthMiddleware(jwtManager *utils.JWTManager) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		// 从 Header 获取 Token
+		authHeader := c.GetHeader("Authorization")
+		if authHeader == "" {
+			c.JSON(http.StatusUnauthorized, gin.H{
+				"error": "authorization header is required",
+			})
+			c.Abort()
+			return
+		}
+
+		// 解析 Bearer Token
+		parts := strings.SplitN(authHeader, " ", 2)
+		if len(parts) != 2 || parts[0] != "Bearer" {
+			c.JSON(http.StatusUnauthorized, gin.H{
+				"error": "invalid authorization header format",
+			})
+			c.Abort()
+			return
+		}
+
+		tokenString := parts[1]
+
+		// 验证 Token
+		claims, err := jwtManager.ParseToken(tokenString)
+		if err != nil {
+			c.JSON(http.StatusUnauthorized, gin.H{
+				"error": err.Error(),
+			})
+			c.Abort()
+			return
+		}
+
+		// 将用户信息存入上下文
+		c.Set("userID", claims.UserID)
+		c.Set("username", claims.Username)
+		c.Set("role", claims.Role)
+
+		c.Next()
+	}
+}
+
+// AdminMiddleware 管理员权限中间件
+func AdminMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		role, exists := c.Get("role")
+		if !exists || role != "admin" {
+			c.JSON(http.StatusForbidden, gin.H{
+				"error": "admin permission required",
+			})
+			c.Abort()
+			return
+		}
+		c.Next()
+	}
+}
+
+// GetUserID 从上下文获取用户 ID
+func GetUserID(c *gin.Context) (uint, bool) {
+	userID, exists := c.Get("userID")
+	if !exists {
+		return 0, false
+	}
+	return userID.(uint), true
+}
+
+// GetUsername 从上下文获取用户名
+func GetUsername(c *gin.Context) (string, bool) {
+	username, exists := c.Get("username")
+	if !exists {
+		return "", false
+	}
+	return username.(string), true
+}