From 6ca8a38faebb0107b8c80c480cbb0d33ee18a671 Mon Sep 17 00:00:00 2001
From: 16337 <1633794139@qq.com>
Date: Sat, 28 Feb 2026 15:47:48 +0800
Subject: [PATCH] =?UTF-8?q?fix(aiot):=20=E5=89=8D=E7=AB=AF=E6=88=AA?=
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给COS预签名URL附加_t=timestamp参数，确保每次刷新截图时
浏览器不使用缓存的旧图片。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 web/src/views/cameraConfig/roiConfig.vue | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/web/src/views/cameraConfig/roiConfig.vue b/web/src/views/cameraConfig/roiConfig.vue
index d689682d7..48bc24e3d 100644
--- a/web/src/views/cameraConfig/roiConfig.vue
+++ b/web/src/views/cameraConfig/roiConfig.vue
@@ -153,7 +153,9 @@ export default {
       getSnapUrl(this.cameraId, force).then(res => {
         const data = res.data || res
         if (data.status === 'ok' && data.url) {
-          this.snapUrl = data.url
+          // 添加时间戳防止浏览器缓存旧截图
+          const url = data.url
+          this.snapUrl = url + (url.includes('?') ? '&' : '?') + '_t=' + Date.now()
           if (data.stale) {
             this.$message.warning('截图为缓存数据，边缘设备可能离线')
           }