draft

backend/internal/api/middleware/jwt_auth.go

@@ -0,0 +1,48 @@
+package middleware
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+// TokenParser 解析 JWT token 的接口
+type TokenParser interface {
+	ParseToken(tokenStr string) (string, error)
+}
+
+// JWTAuth 管理后台 JWT 鉴权中间件
+func JWTAuth(parser TokenParser) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		authHeader := c.GetHeader("Authorization")
+		if authHeader == "" {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
+				"code":    "401",
+				"message": "未登录，请先登录",
+			})
+			return
+		}
+
+		parts := strings.SplitN(authHeader, " ", 2)
+		if len(parts) != 2 || parts[0] != "Bearer" {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
+				"code":    "401",
+				"message": "Token 格式错误",
+			})
+			return
+		}
+
+		username, err := parser.ParseToken(parts[1])
+		if err != nil {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
+				"code":    "401",
+				"message": "Token 无效或已过期",
+			})
+			return
+		}
+
+		c.Set("username", username)
+		c.Next()
+	}
+}