public override string SelectAction(ODataPath odataPath, HttpControllerContext controllerContext, ILookup <string, HttpActionDescriptor> actionMap)
{
if (odataPath == null || controllerContext == null || actionMap == null)
{
return(null);
}
if (odataPath.PathTemplate == "~/entityset/key/property" ||
odataPath.PathTemplate == "~/entityset/key/cast/property" ||
odataPath.PathTemplate == "~/singleton/property" ||
odataPath.PathTemplate == "~/singleton/cast/property")
{
var segment = odataPath.Segments[odataPath.Segments.Count - 1] as Microsoft.OData.UriParser.PropertySegment;
if (segment != null)
{
string actionName = actionMap.FindMatchingAction(ActionName);
if (actionName != null)
{
if (odataPath.PathTemplate.StartsWith("~/entityset/key", StringComparison.Ordinal))
{
Microsoft.OData.UriParser.KeySegment keyValueSegment = odataPath.Segments[1] as Microsoft.OData.UriParser.KeySegment;
controllerContext.RouteData.Values[ODataRouteConstants.Key] = string.Join(",", keyValueSegment
.Keys.Select(k => $"{k.Key}={k.Value}"));
}
controllerContext.RouteData.Values["propertyName"] = segment.Property.Name;
return(ActionName);
}
}
}
return(null);
}
//get all keys FromODataUri
public static IEnumerable <KeyValuePair <string, object> > GetKeysFromODataUri(this ODataPath path)
{
foreach (var segment in path.Segments)
{
EdmType edmType = (EdmType)segment.EdmType;
Microsoft.OData.UriParser.KeySegment keySegment = segment as Microsoft.OData.UriParser.KeySegment;
if (keySegment != null)
{
return(keySegment.Keys);
}
}
return(null);
}
public IEnumerable <ControllerActionDescriptor> SelectAction(RouteContext routeContext)
{
// Get a IActionDescriptorCollectionProvider from the global service provider
IActionDescriptorCollectionProvider actionCollectionProvider =
routeContext.HttpContext.RequestServices.GetRequiredService <IActionDescriptorCollectionProvider>();
Contract.Assert(actionCollectionProvider != null);
// Get OData path from HttpContext
Microsoft.AspNet.OData.Routing.ODataPath odataPath = routeContext.HttpContext.ODataFeature().Path;
HttpRequest request = routeContext.HttpContext.Request;
if (request.Method == "GET" && odataPath.PathTemplate.Equals("~/entityset/key"))
{
string controllerName = odataPath.Segments[0].Identifier;
// Get the list of action descriptors for this controller
var actionDescriptors = actionCollectionProvider.ActionDescriptors.Items
.Cast <ControllerActionDescriptor>()
.Where(ad => ad.ControllerName == controllerName && ad.ActionName == "Get");
foreach (var actionDescriptor in actionDescriptors.OrderByDescending(item => item.ActionName.Length))
{
// We are only interested in examining actions with two parameters.
if (actionDescriptor.Parameters.Count != 1)
{
continue;
}
// See if an OdataRouteAttribute exists in the EndpointMetaData
ODataRouteAttribute oDataRouteAttribute = actionDescriptor.EndpointMetadata.OfType <ODataRouteAttribute>().FirstOrDefault();
string actionName = actionDescriptor.ActionName;
Microsoft.OData.UriParser.KeySegment keyFirst = odataPath.Segments[1] as Microsoft.OData.UriParser.KeySegment;
object keyParentId = keyFirst.Keys.ToList()[0].Value;
routeContext.RouteData.Values["odataPath"] = odataPath;
routeContext.RouteData.Values[actionDescriptor.Parameters[0].Name] = keyParentId;
routeContext.RouteData.Values[ODataRouteConstants.Key] = keyParentId;
return(new[] { actionDescriptor });
}
}
else if (request.Method == "GET" && odataPath.PathTemplate.Equals("~/entityset/key/unresolved"))
{
string controllerName = odataPath.Segments[0].Identifier;
// Get the list of action descriptors for this controller
var actionDescriptors = actionCollectionProvider.ActionDescriptors.Items
.Cast <ControllerActionDescriptor>()
.Where(ad => ad.ControllerName == controllerName);
Microsoft.OData.UriParser.KeySegment keyFirst = odataPath.Segments[1] as Microsoft.OData.UriParser.KeySegment;
object keyParentId = keyFirst.Keys.ToList()[0].Value;
string unresolvedPattern = odataPath.Segments[2].ToString();
// Go from longest named action to shortest to ensure that we don't confuse which action to
// call if two actions have similar names such that one is a sub-set of the other.
foreach (var actionDescriptor in actionDescriptors.OrderByDescending(item => item.ActionName.Length))
{
// We are only interested in examining actions with two parameters.
if (actionDescriptor.Parameters.Count != 2)
{
continue;
}
// See if an OdataRouteAttribute exists in the EndpointMetaData
ODataRouteAttribute oDataRouteAttribute = actionDescriptor.EndpointMetadata.OfType <ODataRouteAttribute>().FirstOrDefault();
string actionName = actionDescriptor.ActionName;
if (oDataRouteAttribute != null)
{
string pathTemplate = oDataRouteAttribute.PathTemplate;
// The only template we want to match is in the shape "{ControllerName}({Parameter 1 Name})/{FunctionName}({Parameter 2 Name})
// If the pattern doesn't match that, then return null;
string compareStartPath = string.Format("{0}({{{1}}})/", controllerName, actionDescriptor.Parameters[0].Name);
string compareEndPath = string.Format("({{{0}}})", actionDescriptor.Parameters[1].Name);
if (!pathTemplate.StartsWith(compareStartPath) || !pathTemplate.EndsWith(compareEndPath))
{
return(null);
}
actionName = pathTemplate.Substring(compareStartPath.Length, pathTemplate.Length - compareStartPath.Length - compareEndPath.Length);
}
// The basic assumption here is that the unresolved segment is a string that looks like this:
// "SomeFunctionName(someParameterValue)"
// So the code below attempts to match the right action and strip out the parameter value
// with simple string manipulations.
unresolvedPattern = unresolvedPattern.Replace(actionName, string.Empty);
if (unresolvedPattern.StartsWith("("))
{
unresolvedPattern = unresolvedPattern.Substring(1);
}
else
{
continue;
}
if (unresolvedPattern.EndsWith(")"))
{
unresolvedPattern = unresolvedPattern.Substring(0, unresolvedPattern.Length - 1);
}
else
{
continue;
}
// What is left in unresolvedPattern should be a single value representing the
// second key value for the function. Use what we know to set the route data values
// and return this matching action descriptor.
routeContext.RouteData.Values["odataPath"] = odataPath;
routeContext.RouteData.Values[actionDescriptor.Parameters[0].Name] = keyParentId;
routeContext.RouteData.Values[actionDescriptor.Parameters[1].Name] = unresolvedPattern;
routeContext.RouteData.Values[ODataRouteConstants.Key] = keyParentId;
routeContext.RouteData.Values[ODataRouteConstants.RelatedKey] = unresolvedPattern;
return(new[] { actionDescriptor });
}
}
//else if ("~/entityset/key/navigation")
return(null);
}
