init: 初始化项目

internal/auth/middleware.go

@@ -0,0 +1,104 @@
+package auth
+
+import (
+	"nebula/internal/api/response"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+// JWTMiddleware JWT 认证中间件
+func JWTMiddleware(jwtService *JWTService) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		authHeader := c.GetHeader("Authorization")
+		if authHeader == "" {
+			response.Fail(c, 401, "missing authorization header")
+			c.Abort()
+			return
+		}
+
+		// 解析 Bearer token
+		parts := strings.SplitN(authHeader, " ", 2)
+		if len(parts) != 2 || parts[0] != "Bearer" {
+			response.Fail(c, 401, "invalid authorization header format")
+			c.Abort()
+			return
+		}
+
+		tokenString := parts[1]
+
+		// 验证 token
+		claims, err := jwtService.ValidateToken(tokenString)
+		if err != nil {
+			response.Fail(c, 401, "invalid or expired token")
+			c.Abort()
+			return
+		}
+
+		// 将用户信息保存到上下文
+		c.Set("user_id", claims.UserID)
+		c.Set("username", claims.Username)
+		c.Set("role", claims.Role)
+
+		c.Next()
+	}
+}
+
+// OptionalJWTMiddleware 可选的 JWT 中间件（token 无效不报错）
+func OptionalJWTMiddleware(jwtService *JWTService) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		authHeader := c.GetHeader("Authorization")
+		if authHeader != "" {
+			parts := strings.SplitN(authHeader, " ", 2)
+			if len(parts) == 2 && parts[0] == "Bearer" {
+				tokenString := parts[1]
+				if claims, err := jwtService.ValidateToken(tokenString); err == nil {
+					c.Set("user_id", claims.UserID)
+					c.Set("username", claims.Username)
+					c.Set("role", claims.Role)
+				}
+			}
+		}
+		c.Next()
+	}
+}
+
+// AdminMiddleware 管理员权限中间件（需要先使用 JWTMiddleware）
+func AdminMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		role, exists := c.Get("role")
+		if !exists || role != "admin" {
+			response.Fail(c, 403, "admin access required")
+			c.Abort()
+			return
+		}
+		c.Next()
+	}
+}
+
+// GetCurrentUserID 从上下文获取当前用户 ID
+func GetCurrentUserID(c *gin.Context) (string, bool) {
+	userID, exists := c.Get("user_id")
+	if !exists {
+		return "", false
+	}
+	return userID.(string), true
+}
+
+// GetCurrentUsername 从上下文获取当前用户名
+func GetCurrentUsername(c *gin.Context) (string, bool) {
+	username, exists := c.Get("username")
+	if !exists {
+		return "", false
+	}
+	return username.(string), true
+}
+
+// GetCurrentUserRole 从上下文获取当前用户角色
+func GetCurrentUserRole(c *gin.Context) (string, bool) {
+	role, exists := c.Get("role")
+	if !exists {
+		return "", false
+	}
+	return role.(string), true
+}