63 lines
1.9 KiB
C#
63 lines
1.9 KiB
C#
using System.Text.Json;
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namespace MealPlan.Api.Middleware;
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/// <summary>
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/// Converts unhandled exceptions into RFC-7807-style JSON problem responses and logs them.
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/// Internal details are never leaked to the client.
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/// </summary>
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public class ExceptionMiddleware
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{
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private readonly RequestDelegate _next;
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private readonly ILogger<ExceptionMiddleware> _logger;
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public ExceptionMiddleware(RequestDelegate next, ILogger<ExceptionMiddleware> logger)
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{
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_next = next;
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_logger = logger;
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}
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public async Task InvokeAsync(HttpContext context)
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{
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try
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{
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await _next(context);
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}
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catch (OperationCanceledException) when (context.RequestAborted.IsCancellationRequested)
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{
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// Client disconnected; nothing actionable to report.
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_logger.LogDebug("Request {Path} was cancelled by the client", context.Request.Path);
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Unhandled exception for {Method} {Path}",
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context.Request.Method, context.Request.Path);
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if (context.Response.HasStarted)
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{
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throw;
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}
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context.Response.Clear();
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context.Response.StatusCode = StatusCodes.Status500InternalServerError;
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context.Response.ContentType = "application/problem+json";
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var payload = new
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{
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type = "https://httpstatuses.io/500",
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title = "An unexpected error occurred.",
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status = StatusCodes.Status500InternalServerError,
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traceId = context.TraceIdentifier,
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};
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await context.Response.WriteAsync(JsonSerializer.Serialize(payload));
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}
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}
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}
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public static class ExceptionMiddlewareExtensions
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{
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public static IApplicationBuilder UseExceptionMiddleware(this IApplicationBuilder app) =>
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app.UseMiddleware<ExceptionMiddleware>();
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}
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