dev 分支暂存

backend/gateway/internal/middleware/auth.go

@@ -0,0 +1,54 @@
+package middleware
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+
+	"github.com/yourname/cyrene-ai/gateway/internal/config"
+)
+
+// Auth 用户键值在context中的key
+const UserIDKey = "user_id"
+
+// JWTAuth JWT认证中间件
+func JWTAuth(cfg *config.Config) 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
+		}
+
+		// Bearer token
+		parts := strings.SplitN(authHeader, " ", 2)
+		if len(parts) != 2 || strings.ToLower(parts[0]) != "bearer" {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "认证格式错误"})
+			c.Abort()
+			return
+		}
+
+		tokenString := parts[1]
+		userID, err := cfg.ValidateToken(tokenString)
+		if err != nil {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "认证令牌无效或已过期"})
+			c.Abort()
+			return
+		}
+
+		// 将userID注入上下文
+		c.Set(UserIDKey, userID)
+		c.Next()
+	}
+}
+
+// GetUserID 从上下文获取用户ID
+func GetUserID(c *gin.Context) string {
+	userID, _ := c.Get(UserIDKey)
+	if userID == nil {
+		return ""
+	}
+	return userID.(string)
+}