public Task InvokeAsync(IQueryContext context)
{
if (_options.UseComplexityMultipliers == true &&
_options.MaxOperationComplexity.HasValue)
{
if (IsContextIncomplete(context))
{
context.Result = QueryResult.CreateError(
ErrorBuilder.New()
.SetMessage(CoreResources
.MaxComplexityMiddleware_Prerequisite)
.Build());
return(Task.CompletedTask);
}
else
{
var visitorContext = MaxComplexityVisitorContext.New(
context.Schema,
context.Operation.Variables,
_calculation);
int complexity = _visitor.Visit(
context.Document,
context.Operation.Definition,
visitorContext);
if (IsAllowedComplexity(complexity))
{
return(_next(context));
}
else
{
IError error = ErrorBuilder.New()
.SetMessage(string.Format(
CultureInfo.InvariantCulture,
CoreResources
.MaxComplexityMiddleware_NotAllowed,
complexity,
_options.MaxOperationComplexity))
.AddLocation(context.Operation.Definition)
.Build();
context.Result = QueryResult.CreateError(error);
return(Task.CompletedTask);
}
}
}
return(_next(context));
}
public Task InvokeAsync(IQueryContext context)
{
if (_options.UseComplexityMultipliers == true &&
_options.MaxOperationComplexity.HasValue)
{
if (IsContextIncomplete(context))
{
context.Result = QueryResult.CreateError(new QueryError(
"The max complexity middleware expects the " +
"query document to be parsed and the operation " +
"to be resolved."));
return(Task.CompletedTask);
}
else
{
var visitorContext = MaxComplexityVisitorContext.New(
context.Schema,
context.Operation.Variables,
_calculation);
int complexity = _visitor.Visit(
context.Document,
context.Operation.Definition,
visitorContext);
if (IsAllowedComplexity(complexity))
{
return(_next(context));
}
else
{
Location[] locations =
context.Operation.Definition.Location == null
? null
: QueryError.ConvertLocation(
context.Operation.Definition.Location);
context.Result = QueryResult.CreateError(new QueryError(
"The operation that shall be executed has a " +
$"complexity of {complexity}. \n" +
"The maximum allowed query complexity is " +
$"{_options.MaxOperationComplexity}.",
locations));
return(Task.CompletedTask);
}
}
}
return(_next(context));
}