/// <summary>
/// Process an individual request.
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public async Task Invoke(HttpContext context)
{
try
{
await _next(context);
}
catch (Exception ex)
{
_logger.LogError(0, ex, "An unhandled exception has occurred while executing the request");
if (context.Response.HasStarted)
{
_logger.LogWarning("The response has already started, the error page middleware will not be executed.");
throw;
}
try
{
context.Response.Clear();
context.Response.StatusCode = 500;
await DisplayException(context, ex);
if (_diagnosticSource.IsEnabled("Microsoft.AspNetCore.Diagnostics.UnhandledException"))
{
_diagnosticSource.Write("Microsoft.AspNetCore.Diagnostics.UnhandledException", new { httpContext = context, exception = ex });
}
return;
}
catch (Exception ex2)
{
// If there's a Exception while generating the error page, re-throw the original exception.
_logger.LogError(0, ex2, "An exception was thrown attempting to display the error page.");
}
throw;
}
}
