Rename projects to FileShare
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using FileShare_Services.Core;
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namespace FileShare_Services.Extensions
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{
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/// <summary>
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/// Desktop (FileShare-PC) 端点适配器。
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/// 将统一端点转换为桌面端可用的路由处理器，支持过滤器和鉴权管道。
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/// </summary>
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public class DesktopEndpointAdapter
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{
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/// <summary>
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/// 统一端点集合。
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/// </summary>
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private readonly ServiceEndpointCollection _endpoints;
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/// <summary>
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/// 鉴权服务。
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/// </summary>
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private readonly IAuthService _authService;
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/// <summary>
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/// DI 服务提供程序。
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/// </summary>
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private readonly IServiceProvider _serviceProvider;
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/// <summary>
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/// 匹配后的路由结果（与原有 RouteDispatchResult 兼容）。
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/// </summary>
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public class RouteResult
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{
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/// <summary>
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/// 获取是否匹配到路由。
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/// </summary>
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public bool IsMatched { get; init; }
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/// <summary>
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/// 获取 HTTP 状态码。
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/// </summary>
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public int StatusCode { get; init; } = 200;
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/// <summary>
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/// 获取状态描述文本。
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/// </summary>
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public string StatusMessage { get; init; } = "";
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/// <summary>
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/// 获取响应数据。
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/// </summary>
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public object? Data { get; init; }
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/// <summary>
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/// 获取响应头字典。
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/// </summary>
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public Dictionary<string, string> ResponseHeaders { get; init; } = new();
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/// <summary>
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/// 创建成功响应结果。
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/// </summary>
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/// <param name="data">响应数据。</param>
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/// <param name="ctx">端点上下文。</param>
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/// <returns>路由结果。</returns>
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public static RouteResult Success(object? data, ServiceEndpointContext ctx)
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{
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return new RouteResult
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{
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IsMatched = true,
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StatusCode = ctx.StatusCode,
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StatusMessage = ctx.StatusMessage,
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Data = data,
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ResponseHeaders = new Dictionary<string, string>(ctx.ResponseHeaders, StringComparer.OrdinalIgnoreCase),
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};
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}
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/// <summary>
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/// 创建 404 未找到响应。
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/// </summary>
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/// <returns>表示未匹配的路由结果。</returns>
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public static RouteResult NotFound() => new()
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{
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IsMatched = false,
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StatusCode = 404,
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StatusMessage = "Not Found",
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};
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}
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/// <summary>
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/// 初始化桌面端点适配器。
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/// </summary>
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/// <param name="endpoints">端点集合。</param>
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/// <param name="authService">鉴权服务。</param>
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/// <param name="serviceProvider">DI 服务提供程序。</param>
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public DesktopEndpointAdapter(
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ServiceEndpointCollection endpoints,
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IAuthService authService,
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IServiceProvider serviceProvider)
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{
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_endpoints = endpoints;
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_authService = authService;
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_serviceProvider = serviceProvider;
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}
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/// <summary>
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/// 处理来自前端（WebView2 Bridge）的请求。
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/// </summary>
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/// <param name="path">规范化路径，如 "api/wData"</param>
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/// <param name="method">HTTP 方法</param>
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/// <param name="body">请求体字符串</param>
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/// <param name="headers">请求头字典</param>
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/// <param name="query">查询参数字典</param>
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public async Task<RouteResult> HandleRequestAsync(
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string path,
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string method,
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string? body,
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Dictionary<string, string>? headers = null,
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Dictionary<string, string>? query = null)
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{
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// 查找匹配的端点（忽略大小写 + 方法匹配）
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var match = _endpoints.Endpoints
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.Where(e =>
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e.SupportsHost(EndpointHostTarget.Pc) &&
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string.Equals(e.HttpMethod, method, StringComparison.OrdinalIgnoreCase))
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.Select(e => new
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{
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Endpoint = e,
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IsMatched = ServiceEndpointPatternMatcher.TryMatch(e.Pattern, path, out var routeValues),
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RouteValues = routeValues,
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})
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.FirstOrDefault(candidate => candidate.IsMatched);
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var endpoint = match?.Endpoint;
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if (endpoint is null)
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{
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return RouteResult.NotFound();
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}
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// 构建上下文
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var ctx = new ServiceEndpointContext
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{
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Path = path,
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Method = method,
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Body = body,
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Headers = headers ?? new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase),
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Query = query ?? new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase),
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RouteValues = match!.RouteValues,
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Items = { ["ServiceProvider"] = _serviceProvider },
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};
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try
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{
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// 1. 鉴权检查
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if (endpoint.RequireAuthorization)
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{
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var user = await _authService.AuthenticateAsync(ctx);
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if (user is null)
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{
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ctx.StatusCode = 401;
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ctx.StatusMessage = "Unauthorized";
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ctx.ResponseBody = new { success = false, error = "Unauthorized" };
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return RouteResult.Success(ctx.ResponseBody, ctx);
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}
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if (endpoint.Roles.Count > 0)
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{
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var authorized = await _authService.AuthorizeAsync(user, $"roles:{string.Join(',', endpoint.Roles)}");
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if (!authorized)
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{
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ctx.StatusCode = 403;
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ctx.StatusMessage = "Forbidden";
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ctx.ResponseBody = new { success = false, error = "Forbidden" };
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return RouteResult.Success(ctx.ResponseBody, ctx);
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}
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}
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else if (!string.IsNullOrEmpty(endpoint.Policy))
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{
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var authorized = await _authService.AuthorizeAsync(user, endpoint.Policy);
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if (!authorized)
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{
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ctx.StatusCode = 403;
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ctx.StatusMessage = "Forbidden";
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ctx.ResponseBody = new { success = false, error = "Forbidden" };
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return RouteResult.Success(ctx.ResponseBody, ctx);
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}
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}
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ctx.Items["User"] = user;
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}
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// 2. 构建过滤管道：全局过滤器 → 端点过滤器 → 处理器
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var pipeline = BuildPipeline(endpoint);
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// 3. 执行管道
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await pipeline(ctx);
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return RouteResult.Success(ctx.ResponseBody, ctx);
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}
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catch (Exception ex)
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{
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ctx.StatusCode = 500;
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ctx.StatusMessage = "Internal Server Error";
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ctx.ResponseBody = new { success = false, error = ex.Message };
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return RouteResult.Success(ctx.ResponseBody, ctx);
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}
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}
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/// <summary>
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/// 构建过滤管道（全局过滤器 + 端点过滤器 → 端点处理器）。
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/// </summary>
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private EndpointFilterDelegate BuildPipeline(ServiceEndpoint endpoint)
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{
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// 最内层：端点处理器
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EndpointFilterDelegate handler = async (ctx) =>
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{
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ctx.ResponseBody = await endpoint.Handler(ctx);
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};
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// 先包裹端点专属过滤器（后注册的先执行）
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var filters = new List<IEndpointFilter>();
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filters.AddRange(_endpoints.GlobalFilters);
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filters.AddRange(endpoint.Filters);
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for (int i = filters.Count - 1; i >= 0; i--)
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{
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var filter = filters[i];
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var next = handler;
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handler = (ctx) => filter.InvokeAsync(ctx, next);
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}
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return handler;
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}
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}
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/// <summary>
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/// Desktop 端的辅助扩展。不依赖 IServiceCollection（由宿主项目自行完成 DI 注册）。
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/// </summary>
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public static class DesktopServiceExtensions
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{
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/// <summary>
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/// 快速构建 DesktopEndpointAdapter（用于非 DI 场景如 MainWindow）。
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/// </summary>
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public static DesktopEndpointAdapter CreateAdapter(
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this ServiceEndpointCollection endpoints,
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IServiceProvider serviceProvider)
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{
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var auth = (serviceProvider.GetService(typeof(IAuthService)) as IAuthService) ?? new AnonymousAuthService();
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return new DesktopEndpointAdapter(endpoints, auth, serviceProvider);
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}
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}
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}
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