public virtual HttpControllerDescriptor SelectController(HttpRequestMessage request)
{
if (request == null)
{
throw Error.ArgumentNull("request");
}
IHttpRouteData routeData = request.GetRouteData();
HttpControllerDescriptor controllerDescriptor;
if (routeData != null)
{
IHttpRoute route = routeData.Route;
if (route != null)
{
controllerDescriptor = route.GetDirectRouteController();
if (controllerDescriptor != null)
{
return(controllerDescriptor);
}
}
}
string controllerName = GetControllerName(request);
if (String.IsNullOrEmpty(controllerName))
{
throw new HttpResponseException(request.CreateErrorResponse(
HttpStatusCode.NotFound,
Error.Format(SRResources.ResourceNotFound, request.RequestUri),
Error.Format(SRResources.ControllerNameNotFound, request.RequestUri)));
}
if (_controllerInfoCache.Value.TryGetValue(controllerName, out controllerDescriptor))
{
return(controllerDescriptor);
}
ICollection <Type> matchingTypes = _controllerTypeCache.GetControllerTypes(controllerName);
// ControllerInfoCache is already initialized.
Contract.Assert(matchingTypes.Count != 1);
if (matchingTypes.Count == 0)
{
// no matching types
throw new HttpResponseException(request.CreateErrorResponse(
HttpStatusCode.NotFound,
Error.Format(SRResources.ResourceNotFound, request.RequestUri),
Error.Format(SRResources.DefaultControllerFactory_ControllerNameNotFound, controllerName)));
}
else
{
// multiple matching types
throw CreateAmbiguousControllerException(request.GetRouteData().Route, controllerName, matchingTypes);
}
}
public virtual IHttpController CreateController(HttpControllerContext controllerContext, string controllerName)
{
if (controllerContext == null)
{
throw Error.ArgumentNull("controllerContext");
}
if (String.IsNullOrEmpty(controllerName))
{
throw Error.ArgumentNullOrEmpty("controllerName");
}
HttpControllerDescriptor controllerDescriptor;
if (_controllerInfoCache.Value.TryGetValue(controllerName, out controllerDescriptor))
{
// Create controller instance
return(CreateInstance(controllerContext, controllerDescriptor));
}
ICollection <Type> matchingTypes = _controllerTypeCache.GetControllerTypes(controllerName);
switch (matchingTypes.Count)
{
case 0:
// no matching types
throw new HttpResponseException(controllerContext.Request.CreateResponse(
HttpStatusCode.NotFound,
Error.Format(SRResources.DefaultControllerFactory_ControllerNameNotFound, controllerName)));
case 1:
// single matching type
Type match = matchingTypes.First();
// Add controller descriptor to cache
controllerDescriptor = new HttpControllerDescriptor(_configuration, controllerName, match);
_controllerInfoCache.Value.TryAdd(controllerName, controllerDescriptor);
// Create controller instance
return(CreateInstance(controllerContext, controllerDescriptor));
default:
// multiple matching types
throw new HttpResponseException(controllerContext.Request.CreateResponse(
HttpStatusCode.InternalServerError,
CreateAmbiguousControllerExceptionMessage(controllerContext.RouteData.Route, controllerName, matchingTypes)));
}
}