7e8623730b
- 将 file 目录下的命名空间从 BuildFlow.Host.Endpoints.file 统一为 BuildFlow.Host.Endpoints.File - 将 im 目录下的命名空间从 BuildFlow.Host.Endpoints.im 统一为 BuildFlow.Host.Endpoints.IM - 将 rag 目录下的命名空间从 BuildFlow.Host.Endpoints.rag 统一为 BuildFlow.Host.Endpoints.Rag - 将 workflow 目录下的命名空间从 BuildFlow.Host.Endpoints.workflow 统一为 BuildFlow.Host.Endpoints.Workflow - 将 platform 目录下的命名空间从 BuildFlow.Host.Endpoints.rag 统一为 BuildFlow.Host.Endpoints.Platform - 修复了多个端点类的命名空间大小写不一致的问题
43 lines
1.6 KiB
C#
43 lines
1.6 KiB
C#
using System.Net.Mime;
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using File.Application.Features.Files.Queries;
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using MediatR;
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namespace BuildFlow.Host.Endpoints.File.Files;
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/// <summary>
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/// 文件预览端点。GET /api/files/preview，流式返回文件内容供内联展示（非下载）。
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/// 后端从 S3 拉流透传，前端永远不接触 S3 URL 和凭据。
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/// 鉴权：[Authorize] + JWT 中间件从 token query 参数读 JWT（img src / window.open 无法带 header）。
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/// 该路径在 ApiResponseMiddlewareOptions.PassthroughPrefixes 注册，绕过响应包裹中间件的缓冲。
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/// </summary>
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[Authorize]
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public class GetFilePreviewEndpoint(IMediator mediator) : Endpoint<GetFilePreviewRequest>
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{
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public override void Configure()
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{
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Get("/files/preview");
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}
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public override async Task HandleAsync(GetFilePreviewRequest req, CancellationToken ct)
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{
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// 复用下载查询（返回 Stream + ContentType + FileName）
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var result = await mediator.Send(new DownloadFileQuery(req.ObjectKey), ct);
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// inline = 浏览器内联展示（图片/PDF 直接渲染），而非触发下载
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HttpContext.Response.ContentType = result.ContentType;
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var disposition = new ContentDisposition { FileName = result.FileName, Inline = true };
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HttpContext.Response.Headers.ContentDisposition = disposition.ToString();
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// 流式透传：S3 流 → HTTP 响应体
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try
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{
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await result.Stream.CopyToAsync(HttpContext.Response.Body, ct);
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await HttpContext.Response.Body.FlushAsync(ct);
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}
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finally
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{
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await result.Stream.DisposeAsync();
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}
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}
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}
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