From 5d8d186d7460832f2e2bf17b16200bfada0962b4 Mon Sep 17 00:00:00 2001
From: wonder <hezhaohui0807@163.com>
Date: Mon, 25 May 2026 16:57:53 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E4=BF=AE=E5=A4=8D=20JWT=20Claims=20?=
 =?UTF-8?q?=E7=B1=BB=E5=9E=8B=E8=BD=AC=E6=8D=A2=E9=97=AE=E9=A2=98?=
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AuthMiddleware 中的 userID 从 JWT claims 解析时，JWT 库默认将数字字段解析为 float64 类型，
但 handler 使用 GetUint 获取，导致类型不匹配。

修复内容：
- 增加 strconv 导入
- 增强类型转换逻辑，支持 float64、int、int64、uint 和 string 类型统一转换为 uint

这将确保用户登录后能正常访问需要认证的接口。
---
 backend/internal/mildware/auth.go | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/backend/internal/mildware/auth.go b/backend/internal/mildware/auth.go
index 550da71..b10a7d3 100755
--- a/backend/internal/mildware/auth.go
+++ b/backend/internal/mildware/auth.go
@@ -2,6 +2,7 @@ package mildware
 
 import (
 	"net/http"
+	"strconv"
 	"strings"
 
 	"gen2d/internal/logger"
@@ -45,7 +46,23 @@ func AuthMiddleware(jwtSecret string) gin.HandlerFunc {
 		}
 
 		if sub, ok := claims["sub"]; ok {
-			c.Set("userID", sub)
+			var userID uint
+			switch v := sub.(type) {
+			case float64:
+				userID = uint(v)
+			case int:
+				userID = uint(v)
+			case int64:
+				userID = uint(v)
+			case uint:
+				userID = v
+			case string:
+				num, err := strconv.ParseUint(v, 10, 64)
+				if err == nil {
+					userID = uint(num)
+				}
+			}
+			c.Set("userID", userID)
 		}
 
 		c.Next()