Merge feature/merge-upstream: 数据看板视频封面接口 + Cookie 编辑弹窗全屏化

2026-07-03 23:35:06 +08:00
parent cf40a7e89a 45d3a3de4d
commit a0133fe02d
3 changed files with 87 additions and 22 deletions
@@ -238,6 +238,75 @@ namespace dy.net.Controllers
            return new EmptyResult();
        }

+        /// <summary>
+        /// 获取视频封面图片
+        /// </summary>
+        /// <param name="id">视频ID</param>
+        [Authorize]
+        [HttpGet("cover/{id}")]
+        public async Task<IActionResult> GetVideoCover([FromRoute] string id)
+        {
+            try
+            {
+                var video = await douyinVideoService.GetById(id);
+                if (video == null)
+                {
+                    return GetDefaultCoverImage();
+                }
+
+                // 优先使用本地保存的封面
+                if (!string.IsNullOrWhiteSpace(video.VideoCoverSavePath) && System.IO.File.Exists(video.VideoCoverSavePath))
+                {
+                    var contentType = GetImageContentType(video.VideoCoverSavePath);
+                    var fileStream = System.IO.File.OpenRead(video.VideoCoverSavePath);
+                    return File(fileStream, contentType);
+                }
+
+                // 本地封面缺失时回落到默认占位图
+                return GetDefaultCoverImage();
+            }
+            catch (Exception ex)
+            {
+                Serilog.Log.Error(ex, $"获取视频封面失败: {id}");
+                return GetDefaultCoverImage();
+            }
+        }
+
+        /// <summary>
+        /// 默认封面占位图（SVG）
+        /// </summary>
+        private IActionResult GetDefaultCoverImage()
+        {
+            var svgContent = @"<svg width=""400"" height=""225"" xmlns=""http://www.w3.org/2000/svg"">
+  <rect width=""400"" height=""225"" fill=""#f0f0f0""/>
+  <text x=""50%"" y=""50%"" font-family=""Arial, sans-serif"" font-size=""16"" fill=""#999"" text-anchor=""middle"" dy="".3em"">暂无封面</text>
+</svg>";
+            var svgBytes = System.Text.Encoding.UTF8.GetBytes(svgContent);
+            return File(svgBytes, "image/svg+xml");
+        }
+
+        /// <summary>
+        /// 根据文件扩展名获取图片 Content-Type
+        /// </summary>
+        private string GetImageContentType(string fileName)
+        {
+            if (string.IsNullOrWhiteSpace(fileName))
+            {
+                return "image/jpeg";
+            }
+            var extension = Path.GetExtension(fileName).ToLowerInvariant();
+            return extension switch
+            {
+                ".jpg" or ".jpeg" => "image/jpeg",
+                ".png" => "image/png",
+                ".gif" => "image/gif",
+                ".webp" => "image/webp",
+                ".svg" => "image/svg+xml",
+                ".bmp" => "image/bmp",
+                _ => "image/jpeg"
+            };
+        }
+
        /// <summary>
        /// 播放视频
        /// </summary>