private async Task HandleWithDefaultHandlerAsync(HttpContext context, Exception exception)
{
string originalExceptionName = exception.GetType().FullName;
try
{
await this.defaultExceptionHandler.HandleAsync(context, exception);
}
catch (Exception handlerException)
{
string exceptionName = handlerException.GetType().FullName;
if (!this.hostEnvironment.IsProduction())
{
var response = new ExceptionResponse <Exception>(
"DefaultExceptionHandlerThrewException",
$"Exception {exceptionName} thrown with message {handlerException.Message} when handling exception {originalExceptionName} with message {exception.Message}",
handlerException);
await context.Response.WriteJsonAsync(HttpStatusCode.InternalServerError, response);
}
else
{
context.Response.StatusCode = (int)HttpStatusCode.InternalServerError;
}
}
}
private async Task HandleExceptionAsync(HttpContext context, Exception exception)
{
if (context.Response.HasStarted)
{
return;
}
context.Response.Clear();
Type exceptionHandlerType = ExceptionHandlerInterfaceType.MakeGenericType(exception.GetType());
dynamic exceptionHandler;
try
{
exceptionHandler = this.serviceProvider.GetService(exceptionHandlerType);
}
catch (Exception)
{
await this.HandleWithDefaultHandlerAsync(context, exception);
return;
}
if (exceptionHandler == null)
{
await this.HandleWithDefaultHandlerAsync(context, exception);
return;
}
MethodInfo handleMethod = exceptionHandlerType.GetTypeInfo().GetMethod("HandleAsync");
try
{
if (!(handleMethod is null))
{
await handleMethod.Invoke(exceptionHandler, new object[] { context, exception });
}
}
catch (Exception handleException)
{
string exceptionName = handleException.GetType().FullName;
string originalExceptionName = exception.GetType().FullName;
if (!this.hostEnvironment.IsProduction())
{
var response = new ExceptionResponse <Exception>(
"ExceptionHandlerThrewException",
$"Exception {exceptionName} thrown with message {handleException.Message} when handling exception {originalExceptionName} with message {exception.Message}",
handleException);
await context.Response.WriteJsonAsync(HttpStatusCode.InternalServerError, response);
}
else
{
context.Response.StatusCode = (int)HttpStatusCode.InternalServerError;
}
}
}
/// <summary>
/// Handles the specified exception for the given context.
/// </summary>
/// <param name="context">The request context.</param>
/// <param name="exception">The exception thrown.</param>
/// <returns>An asynchronous operation.</returns>
public async Task HandleAsync(HttpContext context, Exception exception)
{
var response = new ExceptionResponse <Exception>("UnhandledException", "An unhandled exception occurred.", exception);
await context.Response.WriteJsonAsync(HttpStatusCode.InternalServerError, response);
}
