private FieldsParserResult ParseImpl(HttpRequest request)
{
if (!request.Query.ContainsKey(FieldsParameterName))
{
return(FieldsParserResult.NoValue());
}
var isError = !Fields.TryParse(request.Query[FieldsParameterName][0], out var fields);
if (isError)
{
return(FieldsParserResult.Failed());
}
return(FieldsParserResult.Success(fields));
}
/// <summary>
/// Parses the fields parameter from the request.
/// </summary>
/// <param name="request">The request.</param>
/// <returns>The parsed fields.</returns>
public FieldsParserResult Parse(HttpRequest request)
{
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
FieldsParserResult fieldsResult = default;
var httpContext = request.HttpContext;
if (!httpContext.Items.ContainsKey(FieldsCacheKey))
{
httpContext.Items[FieldsCacheKey] = fieldsResult = this.ParseImpl(request);
}
else
{
fieldsResult = (FieldsParserResult)httpContext.Items[FieldsCacheKey];
}
return(fieldsResult);
}
