using System;
using System.IO;
using System.Net.Mime;
using System.Net.Sockets;
using System.Threading.Tasks;
using MediaBrowser.Common.Extensions;
using MediaBrowser.Controller.Authentication;
using MediaBrowser.Controller.Configuration;
using MediaBrowser.Controller.Net;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
namespace Jellyfin.Server.Middleware
{
///
/// Exception Middleware.
///
public class ExceptionMiddleware
{
private readonly RequestDelegate _next;
private readonly ILogger _logger;
private readonly IServerConfigurationManager _configuration;
///
/// Initializes a new instance of the class.
///
/// Next request delegate.
/// Instance of the interface.
/// Instance of the interface.
public ExceptionMiddleware(
RequestDelegate next,
ILogger logger,
IServerConfigurationManager serverConfigurationManager)
{
_next = next;
_logger = logger;
_configuration = serverConfigurationManager;
}
///
/// Invoke request.
///
/// Request context.
/// Task.
public async Task Invoke(HttpContext context)
{
try
{
await _next(context).ConfigureAwait(false);
}
catch (Exception ex)
{
if (context.Response.HasStarted)
{
_logger.LogWarning("The response has already started, the exception middleware will not be executed.");
throw;
}
ex = GetActualException(ex);
bool ignoreStackTrace =
ex is SocketException
|| ex is IOException
|| ex is OperationCanceledException
|| ex is SecurityException
|| ex is AuthenticationException
|| ex is FileNotFoundException;
if (ignoreStackTrace)
{
_logger.LogError(
"Error processing request: {ExceptionMessage}. URL {Method} {Url}.",
ex.Message.TrimEnd('.'),
context.Request.Method,
context.Request.Path);
}
else
{
_logger.LogError(
ex,
"Error processing request. URL {Method} {Url}.",
ex.Message.TrimEnd('.'),
context.Request.Method,
context.Request.Path);
}
context.Response.StatusCode = GetStatusCode(ex);
context.Response.ContentType = MediaTypeNames.Text.Plain;
var errorContent = NormalizeExceptionMessage(ex.Message);
await context.Response.WriteAsync(errorContent).ConfigureAwait(false);
}
}
private static Exception GetActualException(Exception ex)
{
if (ex is AggregateException agg)
{
var inner = agg.InnerException;
if (inner != null)
{
return GetActualException(inner);
}
var inners = agg.InnerExceptions;
if (inners.Count > 0)
{
return GetActualException(inners[0]);
}
}
return ex;
}
private static int GetStatusCode(Exception ex)
{
switch (ex)
{
case ArgumentException _: return StatusCodes.Status400BadRequest;
case SecurityException _: return StatusCodes.Status401Unauthorized;
case DirectoryNotFoundException _:
case FileNotFoundException _:
case ResourceNotFoundException _: return StatusCodes.Status404NotFound;
case MethodNotAllowedException _: return StatusCodes.Status405MethodNotAllowed;
default: return StatusCodes.Status500InternalServerError;
}
}
private string NormalizeExceptionMessage(string msg)
{
if (msg == null)
{
return string.Empty;
}
// Strip any information we don't want to reveal
return msg.Replace(
_configuration.ApplicationPaths.ProgramSystemPath,
string.Empty,
StringComparison.OrdinalIgnoreCase)
.Replace(
_configuration.ApplicationPaths.ProgramDataPath,
string.Empty,
StringComparison.OrdinalIgnoreCase);
}
}
}