59 lines
2.2 KiB
C#
59 lines
2.2 KiB
C#
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using System.Text.Json;
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using Microsoft.AspNetCore.Authorization;
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using Microsoft.AspNetCore.Authorization.Policy;
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namespace SIGCM2.Api.Authorization;
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/// <summary>
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/// Custom IAuthorizationMiddlewareResultHandler that emits a structured ProblemDetails
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/// response for 403 Forbidden outcomes (authenticated user, missing permission).
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///
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/// For 401 Unauthorized and successful outcomes, delegates to the default handler
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/// so the existing JWT Bearer challenge flow is unaffected (REQ-B-07).
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///
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/// Registered as singleton in Program.cs — depends only on framework services.
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/// </summary>
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public sealed class ForbiddenProblemDetailsHandler : IAuthorizationMiddlewareResultHandler
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{
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private static readonly AuthorizationMiddlewareResultHandler DefaultHandler = new();
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private static readonly JsonSerializerOptions SerializerOptions = new()
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{
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PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
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};
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public async Task HandleAsync(
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RequestDelegate next,
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HttpContext context,
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AuthorizationPolicy policy,
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PolicyAuthorizationResult authorizeResult)
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{
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// Only intercept 403s for authenticated users.
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// If the user is not authenticated, the 401 challenge is handled by JwtBearer (REQ-B-07).
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if (authorizeResult.Forbidden && context.User.Identity?.IsAuthenticated == true)
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{
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var requiredPermission = context.Items["RequiredPermission"] as string;
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context.Response.StatusCode = StatusCodes.Status403Forbidden;
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context.Response.ContentType = "application/problem+json; charset=utf-8";
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var problem = new
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{
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type = "https://sigcm2.local/errors/forbidden",
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title = "Acceso denegado",
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status = 403,
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detail = "No tenés el permiso requerido para ejecutar esta acción.",
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permisoRequerido = requiredPermission,
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};
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await context.Response.WriteAsync(
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JsonSerializer.Serialize(problem, SerializerOptions));
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return;
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}
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// Delegate 401 challenges and successful outcomes to the default handler
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await DefaultHandler.HandleAsync(next, context, policy, authorizeResult);
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}
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}
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