/// <summary>
/// Finds matched route from the list with specified request
/// </summary>
public RouteMatch Find(IEnumerable <RouteLeaf> routes, HttpRequest request)
{
//split path to route parts
string[] parts = request.Path.Split('/', StringSplitOptions.RemoveEmptyEntries);
if (parts.Length == 0)
{
parts = new[] { "" }
}
;
RouteLeaf route = null;
foreach (RouteLeaf leaf in routes)
{
RouteLeaf found = FindRouteInLeaf(leaf, request.Method, parts, 0);
if (found != null)
{
route = found;
break;
}
}
if (route == null)
{
return(null);
}
RouteMatch match = new RouteMatch();
match.Values = new Dictionary <string, object>(StringComparer.InvariantCultureIgnoreCase);
match.Route = route.Route;
do
{
RoutePath path = route.Path;
//if type is optional parameter we dont need to check if equals
//we just need to read the part value and put it into value list (if doesn't exists put default value)
if (path.Type == RouteType.OptionalParameter)
{
match.Values.Add(path.Value,
parts.Length <= route.Index
? null
: parts[route.Index]);
}
//if type is parameter we dont need to check if equals
//we just need to read the part value and put it into value list
else if (path.Type == RouteType.Parameter)
{
match.Values.Add(path.Value, parts[route.Index]);
}
route = route.Parent;
}while (route != null);
return(match);
}
/// <summary>
/// Creates RoutePath table from the controller type, action method reflection info and full path.
/// </summary>
private List <RoutePath> GetRoutePath(MethodInfo action, string fullpath)
{
List <RoutePath> result = new List <RoutePath>();
if (string.IsNullOrEmpty(fullpath))
{
result.Add(new RoutePath
{
Type = RouteType.Text,
Value = ""
});
return(result);
}
//split path to parts.
//each part will be replaced to RoutePath class with extra information
string[] parts = fullpath.ToLower(new CultureInfo("en-US")).Split('/', StringSplitOptions.RemoveEmptyEntries);
foreach (string part in parts)
{
if (string.IsNullOrEmpty(part))
{
continue;
}
RoutePath route = new RoutePath();
if (part == "[action]")
{
route.Type = RouteType.Text;
route.Value = action.Name.ToLower(new CultureInfo("en-US"));
}
//if the part is parameter check if it's optional or not and set value as parameter name
else if (part.StartsWith('{'))
{
route.Type = part.Substring(1, 1) == "?"
? RouteType.OptionalParameter
: RouteType.Parameter;
route.Value = route.Type == RouteType.OptionalParameter
? part.Substring(2, part.Length - 3)
: part.Substring(1, part.Length - 2);
}
//for all other kinds set the value directly as text type.
else
{
route.Type = RouteType.Text;
route.Value = part;
}
result.Add(route);
}
return(result);
}
/// <summary>
/// Creates all Route objects of the specified Controller type
/// </summary>
public IEnumerable <RouteLeaf> BuildRoutes(Type controllerType)
{
//find base path for the controller
List <RouteLeaf> routes = CreateControllerRoutes(controllerType);
List <RouteLeaf> edges = new List <RouteLeaf>();
foreach (RouteLeaf leaf in routes)
{
edges.AddRange(GetEdgeLeaves(leaf));
}
MethodInfo[] methods = controllerType.GetMethods();
foreach (MethodInfo method in methods)
{
//find method route if exists
List <RouteInfo> methodRoutes = FindActionRoute(method);
if (methodRoutes.Count == 0)
{
continue;
}
foreach (RouteLeaf cleaf in edges)
{
foreach (RouteInfo info in methodRoutes)
{
//get route table from the fullpath
List <RoutePath> path = GetRoutePath(method, info.Pattern);
RouteLeaf leaf = cleaf;
for (int i = 0; i < path.Count; i++)
{
RoutePath rp = path[i];
RouteLeaf child = new RouteLeaf(rp, leaf);
leaf.Children.Add(child);
leaf = child;
if (i == path.Count - 1)
{
bool isAsync = (AsyncStateMachineAttribute)method.GetCustomAttribute(typeof(AsyncStateMachineAttribute)) != null;
if (!isAsync && method.ReturnType.IsGenericType)
{
if (typeof(Task).IsAssignableFrom(method.ReturnType.GetGenericTypeDefinition()))
{
isAsync = true;
}
}
leaf.Route = new Route
{
ActionType = method,
ControllerType = controllerType,
Method = info.Method,
Path = path.ToArray(),
Parameters = BuildParameters(method),
IsAsyncMethod = isAsync
};
}
}
ApplyControllerAttributes(leaf.Route, controllerType);
ApplyActionAttributes(leaf.Route, method);
}
}
}
return(routes);
}