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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.AspNetCore.Mvc.Filters;
using Microsoft.Extensions.Logging;
namespace Microsoft.AspNetCore.Mvc.Infrastructure;
internal sealed partial class ClientErrorResultFilter : IAlwaysRunResultFilter, IOrderedFilter
{
internal const int FilterOrder = -2000;
private readonly IClientErrorFactory _clientErrorFactory;
private readonly ILogger<ClientErrorResultFilter> _logger;
public ClientErrorResultFilter(
IClientErrorFactory clientErrorFactory,
ILogger<ClientErrorResultFilter> logger)
{
_clientErrorFactory = clientErrorFactory ?? throw new ArgumentNullException(nameof(clientErrorFactory));
_logger = logger ?? throw new ArgumentNullException(nameof(logger));
}
/// <summary>
/// Gets the filter order. Defaults to -2000 so that it runs early.
/// </summary>
public int Order => FilterOrder;
public void OnResultExecuted(ResultExecutedContext context)
{
}
public void OnResultExecuting(ResultExecutingContext context)
{
ArgumentNullException.ThrowIfNull(context);
if (!(context.Result is IClientErrorActionResult clientError))
{
return;
}
// We do not have an upper bound on the allowed status code. This allows this filter to be used
// for 5xx and later status codes.
if (clientError.StatusCode < 400)
{
return;
}
var result = _clientErrorFactory.GetClientError(context, clientError);
if (result == null)
{
return;
}
Log.TransformingClientError(_logger, context.Result.GetType(), result.GetType(), clientError.StatusCode);
context.Result = result;
}
private static partial class Log
{
[LoggerMessage(49, LogLevel.Trace, "Replacing {InitialActionResultType} with status code {StatusCode} with {ReplacedActionResultType}.", EventName = "ClientErrorResultFilter")]
public static partial void TransformingClientError(ILogger logger, Type initialActionResultType, Type replacedActionResultType, int? statusCode);
}
}
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