private static bool TryProcessPrefixTemplate(HttpRequest request, RoutePattern routePattern, out string path)
{
// TODO: Do you have a better way to process the prefix template?
Contract.Assert(request != null);
Contract.Assert(routePattern != null);
HttpContext httpContext = request.HttpContext;
TemplateBinderFactory factory = request.HttpContext.RequestServices.GetRequiredService <TemplateBinderFactory>();
TemplateBinder templateBinder = factory.Create(routePattern);
RouteValueDictionary ambientValues = GetAmbientValues(httpContext);
var templateValuesResult = templateBinder.GetValues(ambientValues, request.RouteValues);
if (templateValuesResult == null)
{
// We're missing one of the required values for this route.
path = default;
return(false);
}
if (!templateBinder.TryProcessConstraints(httpContext, templateValuesResult.CombinedValues, out var _, out var _))
{
path = default;
return(false);
}
path = templateBinder.BindValues(templateValuesResult.AcceptedValues);
int index = path.IndexOf("?", StringComparison.Ordinal); // remove the query string
if (index >= 0)
{
path = path.Substring(0, index);
}
return(true);
}