public async Task Invoke(HttpContext context)
{
try
{
await _next(context);
}
catch (InternalException ex1)
{
PathString originalPath = context.Request.Path;
if (!ex1.ExceptionHandled)
{
if (string.IsNullOrWhiteSpace(ex1.RequestId))
{
ex1.SetRequestId(context.TraceIdentifier);
}
var scopeContext = new ScopeContext();
scopeContext.WithName(nameof(InternalExceptionHandlerMiddleware));
scopeContext.WithRequestId(string.IsNullOrWhiteSpace(ex1.RequestId) ? context.TraceIdentifier : ex1.RequestId);
scopeContext.Push("HttpStatusCode", ex1.HttpStatusCode.ToString());
scopeContext.Push(InternalHelper.CreateExceptionScopeContext(null, context, ex1));
scopeContext.Push("Path", originalPath.Value);
using (scopeContext.BeginScope(_logger))
{
_logger.LogError(ex1, ex1.UserFriendlyMessage);
ex1.ExceptionHandled = true;
}
if (context.Response.HasStarted)
{
_logger.LogWarning("The response has already started, the error handler will not be executed.");
throw;
}
}
if (_options.ExceptionHandlingPath.HasValue)
{
context.Request.Path = _options.ExceptionHandlingPath;
}
try
{
SetupContextResponse(context, ex1, originalPath.Value);
await _options.ExceptionHandler(context);
return;
}
catch (Exception ex2)
{
// Suppress secondary exceptions, re-throw the original.
_logger.LogError(0, ex2, "An exception was thrown attempting to execute the error handler.");
}
finally
{
context.Request.Path = originalPath;
}
throw; // Re-throw the original if we couldn't handle it
}
catch (Exception ex)
{
PathString originalPath = context.Request.Path;
if (_options.ExceptionHandlingPath.HasValue)
{
context.Request.Path = _options.ExceptionHandlingPath;
}
var internalException = ex.ConvertToInternalException(context.TraceIdentifier);
var scopeContext = new ScopeContext();
scopeContext.WithName("Exception Handler of Request")
.WithRequestId(context.TraceIdentifier)
.Push("Path", originalPath.Value)
.Push(InternalHelper.CreateExceptionScopeContext(null, context, internalException));
using (scopeContext.BeginScope(_logger))
{
_logger.LogError(internalException, internalException.UserFriendlyMessage);
internalException.ExceptionHandled = true;
}
// We can't do anything if the response has already started, just abort.
if (context.Response.HasStarted)
{
_logger.LogWarning("The response has already started, the error handler will not be executed.");
throw;
}
try
{
SetupContextResponse(context, internalException, originalPath.Value);
await _options.ExceptionHandler(context);
return;
}
catch (Exception ex2)
{
// Suppress secondary exceptions, re-throw the original.
_logger.LogError(0, ex2, "An exception was thrown attempting to execute the error handler.");
}
finally
{
context.Request.Path = originalPath;
}
throw; // Re-throw the original if we couldn't handle it
}
}
