public bool TryMapping(IHttpContext context, IPathStack path)
{
int index = path.Index;
foreach (string keyword in keywords)
if (!keyword.Equals(path.Pop(), StringComparison.CurrentCultureIgnoreCase))
{
path.ReverseToIndex(index);
return false;
}
return true;
}
public IHttpHandler ParseRoute(IHttpContext context, IPathStack path)
{
if (_controllers == null)
return null;
foreach (IEntryControllerBinding c in _controllers)
{
IHttpHandler handler;
int index = path.Index;
context.Route.ReverseToIndex(-1);
if (c.TryBinding(context, path, out handler))
{
while (handler is IParentActionHandler)
if (!(handler as IParentActionHandler).TryBinding(path, out handler))
return null;
return handler;
}
else
path.ReverseToIndex(index);
}
return null;
}
public IHttpHandler ParseRoute(IHttpContext context, IPathStack path, object controller)
{
IControllerBinding[] bindings = GetControllerBindings(controller.GetType());
if (bindings != null)
{
int index = path.Index;
int controllerIndex = context.Route.Index;
foreach (IControllerBinding binding in bindings)
{
IHttpHandler handler;
if (binding.TryBinding(context, path, controller, out handler))
return handler;
else
{
context.Route.ReverseToIndex(controllerIndex);
path.ReverseToIndex(index);
}
}
}
return null;
}
public virtual bool TryBinding(IHttpContext context, IPathStack path, object controller, out IHttpHandler handler)
{
if (_handlers == null)
{
handler = null;
return false;
}
int bestIndex = -1;
int bestOverloadWeight = -1;
object[] bestParameters = null;
ActionHandler bestHandler = null;
int index = path.Index;
object[] parameters;
int overloadWeight;
foreach (ActionHandler h in _handlers)
{
if (h.Binding.TryBinding(context, path, out parameters, out overloadWeight)
&& (overloadWeight > bestOverloadWeight || (
overloadWeight == bestOverloadWeight && parameters.Length < bestParameters.Length //The fewer parameters the better if same overload weight
)) && (path.IsAtEnd || h is ParentActionHandler))
{
bestIndex = path.Index;
bestHandler = h;
bestParameters = parameters;
bestOverloadWeight = overloadWeight;
}
path.ReverseToIndex(index);
}
if (bestHandler == null)
{
handler = null;
return false;
}
// shouldTrailSlash = bestIndex == index; I.e. the best mapping hasn't used a path
if (bestIndex == index ^ path.TrailingSlash ^ DisableTrailingSlash && !(bestHandler is ParentActionHandler) && context.Request.HttpMethod == "GET")
{
// TODO: Make more efficient by simply extracting the final path section and use relative redirect: ../pathsection or ./pathsection/
IPathStack newPath = new PathStack(false);
newPath.Push(path);
newPath.TrailingSlash = !path.TrailingSlash;
context.Route.Dispose();
context.Response.Redirect("~/" + newPath.ToString(), false);
context.Response.StatusCode = 301;
context.Response.End();
}
path.ReverseToIndex(bestIndex);
if (controller == null) controller = _controllerCreator();
context.Route.AddController(controller, index); // Controller is bound, add it to the route context
handler = bestHandler.GetHttpHandler(context, controller, bestParameters);
return true;
}
bool IActionBinding.TryBinding(IHttpContext context, IPathStack path, out object[] parameters, out int overloadWeight)
{
foreach (IMappingBinding mapping in this.Mappings)
if (!mapping.TryMapping(context, path))
{
parameters = null;
overloadWeight = 0;
return false;
}
// Allow IExtension to affect mapping?
//foreach (IExtension extension in this.Extensions)
// if (!extension.TryMapping(context, path))
// return false;
overloadWeight = Mappings.Count * 10000;
if (Bindings == null)
{
parameters = new object[0];
return true;
}
int l = Bindings.Length;
parameters = new object[Bindings.Length];
for (int i = 0; i < l; i++)
{
ParamBindings pb = Bindings[i];
if (pb.IsIn)
{
bool bound = false;
int index = path.Index;
foreach (IParameterBinding bindable in pb.Bindings)
{
object obj;
int weight;
if (bindable.TryBinding(context, path, out obj, out weight))
{
bool constrained = false;
if (pb.Constraints != null)
foreach (IBindingConstraint constraint in pb.Constraints)
if (!constraint.TryConstraint(context, obj))
{
constrained = true;
path.ReverseToIndex(index);
break;
}
if (!constrained)
{
overloadWeight += weight;
parameters[i] = obj;
bound = true;
break;
}
}
else
{
path.ReverseToIndex(index);
}
}
if (!bound)
{
overloadWeight = 0;
parameters = null;
return false;
}
}
}
return true;
}
public void Push(IPathStack path)
{
if (_readOnly)
throw new InvalidOperationException("This PathStack is read only.");
if (path == null)
throw new InvalidOperationException("The PathStack cannot Push null.");
int index = path.Index;
path.ReverseToIndex(0);
while (!path.IsAtEnd)
this.Push(path.Pop());
this._trailingSlash = path.TrailingSlash;
path.ReverseToIndex(index);
QueryString.Add(path.QueryString);
}
private bool TryBinding(IPathStack path, out object obj)
{
if (path.IsAtEnd)
{
obj = null;
return false;
}
int index = path.Index;
if (_emptyPath != null && _emptyPath.TryMapping(null, path))
{
obj = _emptyValueSet ? _emptyValue : (DefaultValue != null ? DefaultValue : (BindingTargetType.IsValueType ? Activator.CreateInstance(BindingTargetType) : null));
return true;
}
path.ReverseToIndex(index);
if (_deserializer != null)
{
return _deserializer(path, out obj);
}
else
{
string nextPath = path.Peek();
if (Extension != null)
{
if (!nextPath.EndsWith(Extension, StringComparison.CurrentCultureIgnoreCase))
{
obj = null;
return false;
}
nextPath = nextPath.Substring(0, nextPath.Length - Extension.Length);
}
bool f = SerializationHelper.TryDeserialize(nextPath, BindingTargetType, out obj);
if (f)
{
path.Pop();
return true;
}
else
return false;
}
}
