Class ExceptionMiddleware

src/Extensions/ExceptionMiddleware.cs:5–57

using System.Net;

public class ExceptionMiddleware
{
    private readonly RequestDelegate _next;
    private readonly ILogger _logger;

    public ExceptionMiddleware(RequestDelegate next, ILogger<ExceptionMiddleware> logger)
    {
        _next = next;
        _logger = logger;
    }

    public async Task Invoke(HttpContext context)
    {
        try
        {
            await _next(context);
        }
        catch (TaskCanceledException) when (context.RequestAborted.IsCancellationRequested)
        {
            context.Response.StatusCode = 418; // I'm a teapot
        }
        catch (OperationCanceledException) when (context.RequestAborted.IsCancellationRequested)
        {
            context.Response.StatusCode = 418; // I'm a teapot
        }
        catch (BadHttpRequestException ex) when (context.RequestAborted.IsCancellationRequested || ex.StatusCode == (int)HttpStatusCode.RequestTimeout)
        {
            context.Response.StatusCode = 418; // I'm a teapot
        }
#pragma warning disable CS0618 // Type or member is obsolete
        catch (Microsoft.AspNetCore.Server.Kestrel.Core.BadHttpRequestException)
        {
            context.Response.StatusCode = 418; // I'm a teapot
        }
#pragma warning restore CS0618 // Type or member is obsolete
        catch (HttpRequestException ex)
        {
            context.Response.StatusCode = (int)(ex.StatusCode ?? HttpStatusCode.InternalServerError);

            _logger.LogError(ex, "Dependency error on {Path}", context.Request.Path.Value);
        }
        catch (Microsoft.AspNetCore.Authentication.AuthenticationFailureException)
        {
            context.Response.StatusCode = (int)HttpStatusCode.InternalServerError;
        }
        catch (Exception ex)
        {
            context.Response.StatusCode = (int)HttpStatusCode.InternalServerError;

            _logger.LogError(ex, "Unexpected error on {Path}", context.Request.Path.Value);
        }
    }
}